Hair curler apparatus

Abstract

To provide a hair curler apparatus.SOLUTION: A hair curler has an inlet end having an air inlet, a longitudinally spaced apart second end, a longitudinal axis and a plurality of axially spaced apart curler outlets. A land portion is located between adjacent curler outlets and an air flow passage from the air inlet to the curler outlets.SELECTED DRAWING: Figure 108

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to hair care, and more particularly to hair curling. [Background technology]

[0002] Nothing stated below is intended to be an admission that anything described below is part of the prior art or part of the common general knowledge of those skilled in the art.

[0003] Conventional hair curlers employ a heated rod around which a user manually wraps the hair to be curled. While the hair is wrapped around the rod, heat is transferred from the heated rod to the hair to curl the hair. A clip may be provided to hold the hair in place against the heated rod as heat from the rod is transferred to the hair to curl it.

[0004] Curlers that use the Coanda effect to assist in winding the hair around the curlers are also known, see, for example, U.S. Patent Nos. 5,393, 6,433, 6,598, 7,671, 7,813, and 7,943. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent No. 3119234 [Patent Document 2] European Patent No. 3119235 [Patent Document 3] European Patent No. 3119236 Summary of the Invention [Means for solving the problem]

[0006] The following general overview is provided to introduce the reader to the more detailed discussion that follows. This overview is not intended to limit or define any claimed or unclaimed inventions. One or more inventions may reside in any combination or subcombination of elements or process steps disclosed in any part of this specification, including the claims and figures.

[0007] The hair curling device includes an air flow path, the air flow path including an air moving member such as a motor and a fan assembly, extending between an air inlet and an air outlet. The air outlet is formed in a curler head. The curler head is also referred to herein as a hair curler. The curler head is elongated along a longitudinal axis and supports hair wrapped around the longitudinal axis. In some examples, the curler head extends longitudinally between a first end and a second end, the air inlet being at the first end, also referred to herein as the inlet end. Optionally, the curler head is a removable attachment that is removably attached to a body (e.g., a hair dryer or hair curler) that includes an air moving member (e.g., a blower). The air outlet formed in the curler head includes one or more curler outlets. The curler outlets are positioned and shaped to provide an air flow stream for positioning a user's hair in a curling action.

[0008] According to one aspect of the present disclosure, which may be used alone or in combination with any one or more other aspects, instead of or in addition to a hair dryer or hair curler including an air movement member, an air movement member may be included in the curler head.

[0009] According to another aspect of the present disclosure, which may be used alone or in combination with any one or more other aspects, the curler head has one or more curler outlets that direct air exiting the curler outlet to flow around a longitudinal axis of the curler head to help the hair to wrap or wrap around the curler head. The curler outlet includes a duct that extends from an inlet port to an outlet port, which may be in an outer wall of an airflow passage inside the curler head. The inlet port may be a slot-shaped inlet port. The length dimension of the slot-shaped port may extend partially or completely angularly around the longitudinal axis of the curler head. The multiple slot-shaped inlet ports may be arranged in the shape of one or more axially spaced annular rings that open into one or more curler outlet ducts, each annular ring including multiple slot-shaped ports angularly spaced apart from one another. The curler outlet may be arranged to provide airflow at multiple locations around the longitudinal axis, for example to encourage the hair to curl about the longitudinal axis. Alternatively or additionally, the curler outlets may be positioned to provide airflow at multiple locations along the length of the longitudinal axis, for example to provide the user with a larger working surface for receiving the user's hair than if the airflow was restricted to only a single longitudinal portion of the head.

[0010] According to this or other embodiments, the curler outlet may be a tangential air outlet and / or may direct air tangentially to the longitudinal axis of the curler head to wrap the hair around the longitudinal axis. Alternatively or in addition, the curler outlet may direct air across a surface to attach the air flow to the surface (Coanda effect).

[0011] According to another aspect of the disclosure, which may be used alone or in combination with any one or more of the other aspects, the curler outlets of the curler head are arranged in an annular set of angularly positioned curler outlets. The curler outlets may include outlet ports that extend generally parallel to the longitudinal axis of the curler head. Each annular set may be axially spaced apart from the other annular sets. Consecutive longitudinally spaced apart sets may together form multiple rows of outlet ports, each row extending along the longitudinal axis. The rows may be generally linear or may take on another shape, such as a helical shape.

[0012] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, longitudinally consecutive curler outlets, which may otherwise be arranged in an axially extending column, are radially and / or angularly shifted relative to one another. The angularly shifted outlets may, for example, form a helical row of outlet ports extending along the longitudinal axis. The curler outlets may be arranged in a staggered arrangement, in which every other curler outlet along the longitudinal axis is axially aligned with an intervening outlet that is angularly or radially shifted relative to the other. Some or all of the outlets may be axially spaced apart.

[0013] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the longitudinally consecutive curler outlets are longitudinally spaced apart from one another by closed (non-porous) land portions of the body sidewall. In some examples, the closed portions of the body sidewall are permanently closed, such as continuous walls. Optionally, all curler outlets direct air in a common direction (e.g., the curler head is configured to direct air only clockwise or counterclockwise).

[0014] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the curler head may be selectively reconfigurable to direct air in a clockwise or counterclockwise direction. Thus, a single curler may be usable to create right-handed and left-handed curls. Thus, the curler head may have some outlets that direct air in a counterclockwise direction and some outlets that direct air in a clockwise direction. The curler head may be reconfigurable such that in a right-handed curl mode, air exits from a first set of outlet ports that direct air in one direction, and in a left-handed curl mode, air exits from a second set of outlet ports that direct air in the opposite direction. Thus, the curler head may be selectively reconfigurable between a clockwise configuration and a counterclockwise configuration (or between a right-handed curl mode configuration and a left-handed curl mode configuration) by opening one set of outlets and leaving the other set closed. Optionally, all curler outlets that are open at one time direct air in a common direction (ie, clockwise or counterclockwise).

[0015] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the airflow from the curler outlet is directed longitudinally. The curler outlet is shaped such that the exit vector of the airflow includes a longitudinal component in addition to a tangential component. The longitudinal component can make up at least 25%, at least 30%, or at least 40% of the exit vector.

[0016] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the curler outlet is or includes an annular band extending partially or completely around the longitudinal axis of the curler head. The annular band of the curler air outlet can include a plurality of vanes defining an outlet passage that directs the airflow out of the curler outlet. The vanes direct the airflow along a desired outlet vector, optionally including a tangential component. The annular band of the curler air outlet can generate a conical or cylindrical airflow.

[0017] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the annular band of curler air outlets can generate an air flow on one axial side (e.g., the side toward the inlet end of the curler head or the side toward the tip of the curler head). Optionally, the annular band of curler air outlets can generate air flows on both axial sides. The air flows on each axial side can rotate in the same direction and exit at a similar angle relative to the longitudinal axis. Thus, the annular band of curler air outlets can generate a bidirectional air flow. The curler outlets can generate an air flow along a vector with a longitudinal component directed toward the inlet end of the curler head and another air flow along a vector with a longitudinal component directed toward the opposite tip of the curler head.

[0018] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the longitudinal component of the air outlet vector from the curler outlet closest to the inlet end of the curler head may be directed away from the inlet end. All curler outlets of the longitudinal curler segment closest to the inlet end may direct air generally away from the inlet end. Directing air away from the inlet end prevents hair from moving beyond the inlet end, for example onto an integrated handle or blower to which the curler head is attached. This may improve the user experience by keeping the hair on the curler head. All of the curler outlets of the curler head located closest to the inlet end of the curler head may direct air along an outlet vector that includes a longitudinal component directed away from the inlet end. Similarly, all of the curler outlets of the curler head located closest to the tip of the curler head opposite the inlet end of the curler head may direct air along an outlet vector that includes a longitudinal component directed away from the tip. A curler outlet located intermediate the inlet end outlet and the tip outlet can direct air along an outlet vector having a longitudinal component directed toward the inlet end and / or toward the tip. Thus, a longitudinal segment can have curler outlets from which air is directed with opposite longitudinal components (toward the inlet end and toward the outlet end), and these longitudinal segments can be separated by closed longitudinal segments (i.e., segments without air outlets) that form intervening land portions.

[0019] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the curler outlet includes an outlet passage or duct from an inlet port of the curler outlet to an outlet port of the curler outlet, the outlet passage having a cross-sectional airflow area (transverse to the flow of air therethrough) that varies along the flow direction of the outlet passage. This variation may be due to diverging and / or converging inner and outer walls and / or side walls (e.g., formed by vanes as discussed above). The diverging and / or converging walls result in an expansion zone and / or a contraction zone. An expansion zone is a portion of a duct downstream of an inlet port and upstream of an outlet port where the airflow area of ​​the duct expands. A contraction zone is a portion of a duct upstream of an outlet port and downstream of an inlet port where the airflow area of ​​the duct decreases. By including an expansion zone and / or a contraction zone, the airflow velocity of an air jet generated by the outlet is adjusted (e.g., increased and / or decreased). The curler outlet duct may include an outlet end flared zone at the outlet end of the duct. The outlet end flared zone extends to and includes one or more outlet ports of the outlet duct of the curler outlet. The transverse airflow area of ​​the outlet end flared zone may increase along the outlet end flared zone toward the outlet port. In some examples, the transverse airflow area of ​​the duct is greatest at the outlet port. The outlet end flared zone may extend entirely from the inlet port or may extend from a midpoint between the inlet port and the outlet port.

[0020] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the land portions are textured to improve the adhesion of air flow to the outer surface of the curler head. For example, some or all of the land portions can include a surface texture selected to improve the adhesion of air to its surface. The textured land portions can be at points or extend as bands, such as spirals, and can include or consist of radially elevated and / or depressed portions on the surface of the land portions, such as bulges or depressions. The transition between the radially elevated and depressed portions can be generally smooth or can include a small step (e.g., less than 15%, less than 10%, or less than 5% of the diameter of the curler head).

[0021] According to another aspect of the present disclosure, which may be used alone or in combination with any one or more other aspects, the hair receiving surface, e.g., the land portion, is textured to inhibit movement of hair across the surface in a particular direction. In some examples, the textured hair receiving surface is a directional grip surface. The directional grip surface is shaped to inhibit movement of hair across the surface in a selected direction or directions. In some examples, the texture is selected to inhibit hair from moving across the surface in an angular direction (i.e., the unwinding direction). In some examples, the texture is selected so as not to inhibit hair from sliding axially across the surface.

[0022] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the hair receiving surface (e.g., some or all of the land portions and / or the annular strip at the curler outlet) is formed of a thermally conductive material (e.g., metal or plastic with metal embedded therein) to enhance heat transfer to the hair.

[0023] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the land portion (which may be provided for use with the Coanda effect) has a cross-sectional shape and / or size that varies along the longitudinal axis. The land portion forms a radially outer surface of the curler head, which radially outer surface varies in radial width along the axial direction of the curler head. Thus, the land portion forms an annular radially outer surface having a diameter that varies along the longitudinal axis. Optionally, the land portion forms a generally continuous land surface as the shape and / or size changes to encourage airflow to remain attached to the land portion or to include a small step (e.g., less than 15%, less than 10%, or less than 5% of the diameter of the curler head).

[0024] According to another aspect of the present disclosure, which may be used alone or in combination with any one or more other aspects, the minimum cross airflow area through the duct of the curler outlet may vary along the longitudinal length of the curler head. For example, the curler outlet may include a plurality of discontinuous curler outlets arranged from a first location, which may be located at or toward the inlet end of the curler head, to a second location, which may be located at or toward the opposite end of the curler head, which may be located distal to the inlet end of the curler head. The opposite end may optionally be closed. The minimum cross airflow area through the duct of the curler outlet may be larger at the opposite end than at the first end, and may increase continuously from the first end to the opposite end. Alternatively, the minimum cross airflow area through the duct of the curler outlet may be smaller at the opposite end than at the first end, and may decrease continuously from the first end to the opposite end. The reduction in airflow area may be the result of a smaller curler outlet port. Alternatively or additionally, the number of curler outlets in the annular strip may increase or decrease from the first end or inlet end to the opposite end.

[0025] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the air flow path through the interior of the curler head to the curler outlet has a cross-path air flow area that decreases from one end to the other end. The reduction in size may be reflected in a narrowing diameter of the curler head, which reduces the internal opening diameter of the curler head, and the curler head may narrow from one end to the other end. The cross-path air flow area of ​​the air flow path may decrease continuously or in steps. The body sidewall may narrow continuously or in steps. In some examples, the curler head narrows from the first end or inlet end to the second end. Alternatively, the curler head may have an internal conduit with a similarly varying diameter.

[0026] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the magnitude of the exit vector from the curler outlet can vary along some or all of the longitudinal length of the curler head. The magnitude can be smallest for the curler outlet and / or the longitudinal curler segment closest to the inlet end of the curler head. This can reduce the force that carries the hair beyond the inlet end of the curler head, for example onto an integrated handle or onto a blower to which the curler head is attached. The variation in magnitude can be brought about by varying the minimum cross-sectional airflow area of ​​the curler outlet transverse to the direction of flow through the outlet (e.g., throttling the outlet duct of the inlet end curler outlet). Thus, the cross-sectional area of ​​the outlet can vary along some or all of the longitudinal length of the curler head. The cross-sectional area may vary continuously or in steps. The cross-sectional area may vary to generate a generally uniform flow of air exiting through the outlet along the longitudinal length of the curler head.

[0027] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the curler head is reconfigurable between a clockwise configuration, in which air exits the curler outlet in a clockwise direction, and a counterclockwise configuration, in which air exits the curler outlet in a counterclockwise direction, by partially or fully opening or closing one or more valves. By adjusting one or more valves, the flow paths within the curler head can be reconfigured to allow the curler head to be reconfigured between the clockwise and counterclockwise configurations, and can be reconfigurable with a minimum of moving parts.

[0028] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head can also be used as a concentrator and / or diffuser. The curler head can include one or more secondary air outlets in addition to the curler outlet, which are arranged to direct the air flow as a concentrator and / or diffuser. Optionally, the curler head is selectively reconfigurable between all three of the concentrator configuration, the diffuser configuration, and the curler configuration. The diffuser and / or concentrator can be provided at a second end of the curler head.

[0029] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the curler head includes an inlet bleed valve and / or an outlet bleed valve. The inlet bleed valve and / or the outlet bleed valve are selectively openable while the curler outlets remain open and lead to a common portion of the air flow path from which some or all of the curler outlets open. Any such bleed valves may be located in any suitable location. The bleed valve may be an inlet bleed valve or a bleed air inlet, such as a venturi inlet that draws air into the curler head. In use, the bleed air inlet provides additional air to the curler outlet. The additional air may be cooler air that, when combined with the air already flowing through the curler head, reduces the temperature of the air exiting the curler outlet, for example, to set the curl. The air exiting through the bleed air inlet may bypass and / or be introduced downstream of the heating element of the curler head and / or the heating element of a blower used in cooperation with the curler head. The bleed valve may be an outlet bleed valve or a bleed air outlet, which is an outlet that can be selectively opened while the curler outlet is open and that opens from a common portion of the air flow path (from which the curler outlet opens). In use, the bleed air outlet draws air flow from the curler outlet to reduce the amount of air flow exiting the curler outlet, thereby reducing the curling force and allowing, for example, easier removal of hair after the curls have been set. The bleed air inlet and / or outlet may be in the curler head and / or in a blower used in cooperation with the curler head. If the bleed valve is an inlet bleed valve in the curler head, it may be located at the inlet end to provide additional air upstream of any curler outlet. The bleed air outlet may be upstream of all or some of the curler outlets.

[0030] According to another aspect of the disclosure, which can be used alone or in combination with any one or more other aspects, the curler head can include a venturi at the inlet end of the curler head. The venturi creates a pressure drop, and the curler head includes one or more air inlets that lead into the venturi to draw air into the curler head at the inlet end of the curler head. Drawing air into the curler head at the inlet end of the curler head can pull hair down against the curler head at the inlet end of the curler head. This prevents hair from moving beyond the inlet end of the curler head, for example, onto an integrated handle or onto a blower to which the curler head is attached.

[0031] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, the curler head includes an axially extending surface indentation on a surface of the curler head. The curler outlet is disposed in the axially extending indentation to direct air into an outlet vector that includes a tangential component. The curler outlet may consist of an outlet port that opens through the body sidewall, such as where the port opens through a generally radially extending portion of the sidewall formed by a lateral surface of the indentation.

[0032] According to another aspect of the disclosure, which can be used alone or in combination with any one or more of the other aspects, the curler head has a longitudinally extending segment at a first end without a curler outlet. The portion at the first end of the curler head has, for example, a closed or non-porous body sidewall extending from the first end over an axial extent. The axial extent can be at least 10%, at least 20%, or at least 30% of the total axial extent of the curler head. A head air inlet is at the first end, and an air passage extends from the inlet through a closed end portion of the sidewall. An air moving member, such as a motor and fan assembly (e.g., a blower) and / or a heater, can be provided in the non-porous portion.

[0033] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head includes auxiliary second end heating. In an example where the curler head receives heated air from a blower at a first end, the first end can receive more heat energy from the air than the opposite second end of the curler head. Thus, the auxiliary second end heating provides more uniform heating along the length of the curler head between the first end and the second end. Thus, a heating element can be provided downstream of at least the first annular strip of the curler outlet.

[0034] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head includes an air movement member. By including an air movement member in the curler head, the air flow (e.g., amount or speed) can be more finely controlled to allow the air flow to be optimized for the curler head. In examples where the curler head includes an air movement member, the hair dryer or hair curler may not include an air movement member (e.g., a blower).

[0035] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head includes a heating member. The heating member of the curler head may be in addition to or instead of the heating member of the hair dryer or hair curler. The heating member includes an electrical heating element, and if the heating member generates infrared (IR) radiation, the heating member may include an infrared absorbing member. The infrared radiation source may include a radiating element encased in an infrared transparent housing.

[0036] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head directly heats the hair to reduce the amount of thermal energy swept away by the air used to position the hair. Thus, the curler head includes a heated hair receiving surface, such as a land portion between the annular bands of the curler outlet. The heated surface may be formed by a heating member (e.g., a heating element and / or an infrared absorbing member) and / or the heated surface may be in conductive thermal communication with the heating member. The heated surface conductively heats the hair positioned against the heated surface. Alternatively or in addition, the heated surface acts as an infrared radiation source that directs infrared radiation to adjacent hairs. In some examples, the heated surface is thermally isolated from the air flow path through the curler head to reduce the transfer of thermal energy to the air flow. For example, the heated surface can form the outer surface of the curler head and overlie an insulating layer extending between the heated surface and the air flow path within the curler head. The insulating layer prevents the transfer of heat from the heated surface to the airflow. The heated surface may be metal, such as a metal filled plastic.

[0037] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more other aspects, the curler head is an inductively charged curler head. The curler head includes an internal energy storage member (e.g., a battery, a capacitor such as an ultracapacitor, etc.), and the internal energy storage member is charged by wireless charging through electromagnetic induction.

[0038] According to another aspect of the present disclosure, which can be used alone or in combination with any one or more aspects, the curler head is formed by separately manufacturing a main tube and a set of rings or bands and then placing the rings onto the main tube by sliding them axially over the main tube.

[0039] According to another aspect of the disclosure, which may be used alone or in combination with any one or more other aspects, rings or bands may be disposed along the main pipe in longitudinal abutment with one another. The rings or bands may each be a single wall (e.g., formed in a single molding) and each may define one or more curler outlets opening through the single wall. The abutting rings or bands may abut without overlapping. The abutting rings or bands may be secured to one another and / or to the main pipe, for example by welding.

[0040] Those skilled in the art will appreciate that the apparatus or methods disclosed herein may embody any one or more of the features contained herein, and that the features may be used in any specific combination or subcombination.

[0041] These and other aspects and features of various embodiments are described in more detail below.

[0042] In order that the described embodiments may be better understood and to show more clearly how same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which: [Brief description of the drawings]

[0043] [Figure 1] 1 is a vertical cross-sectional view of a hair curling device according to an embodiment; [Diagram 2] 1 is a perspective view of a second or opposite end of a curler head, the second end including a curler head air outlet, according to one embodiment. [Diagram 3] FIG. 3 is a perspective view of a first or inlet end of the curler head of FIG. 2. [Figure 4] FIG. 3 is a vertical sectional view of a portion of the curler head of FIG. 2. [Diagram 5] 3 is a cross-sectional view of the curler head of FIG. 2 through one of the curler outlet bands. FIG. [Figure 6] FIG. 3 is a vertical sectional view of the curler head of FIG. 2. [Figure 7] 6 is a perspective view of a portion of the curler head of FIG. 2, seen from the portion of the curler head of FIG. 5; FIG. [Figure 8] FIG. 3 is a top cutaway view of the curler head of FIG. 2. [Figure 9] FIG. 3 is a top view of the curler head of FIG. 2. [Figure 10] FIG. 13 is a top view of a curler head according to another embodiment. [Figure 11] 11 is a perspective view of a first end of the curler head of FIG. 10. FIG. [Figure 12] FIG. 11 is a cross-sectional view of the curler head of FIG. 10. [Figure 13] FIG. 11 is a vertical sectional view of the curler head of FIG. 10. [Figure 14] FIG. 13 is a top view of a curler head according to another embodiment. [Figure 15] 15 is a perspective view of a first end of the curler head of FIG. 14. FIG. [Figure 16] FIG. 15 is a cross-sectional view of the curler head of FIG. 14. [Figure 17] FIG. 15 is a first vertical sectional view of the curler head of FIG. 14. [Figure 18] FIG. 15 is a second vertical sectional view of the curler head of FIG. 14. [Figure 19] FIG. 11 is a vertical sectional view of a hair curler device according to another embodiment. [Figure 20] FIG. 13 is a top view of a curler head according to another embodiment. [Figure 21] 21 is a perspective view of a first end of the curler head of FIG. 20. FIG. [Figure 22] FIG. 21 is a vertical sectional view of the curler head of FIG. 20. [Figure 23] FIG. 21 is a cross-sectional view of the curler head of FIG. 20 with the internal valve removed. [Figure 24] FIG. 21 is a cross-sectional view of the curler head of FIG. 20, showing the internal valve. [Diagram 25] 13 is a perspective view of a second end of the curler head according to another embodiment. FIG. [Figure 26] FIG. 26 is a perspective view of a first end of the curler head of FIG. 25. [Figure 27]FIG. 26 is a vertical sectional view of the curler head of FIG. 25. [Figure 28] FIG. 26 is a cross-sectional view of the curler head of FIG. 25. [Figure 29] FIG. 2 is a perspective view of a first end of a curler head according to one embodiment. [Diagram 30] 30 is a perspective view of another first end of the curler head of FIG. 29. [Diagram 31] FIG. 30 is a cross-sectional view of the curler head of FIG. 29. [Diagram 32] FIG. 30 is a vertical sectional view of the curler head of FIG. 29. [Diagram 33] FIG. 30 is a top view of the curler head of FIG. 29. [Diagram 34] FIG. 30 is a cutaway top view of the curler head of FIG. 29. [Diagram 35] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Diagram 36] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 37] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 38] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 39] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 40] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 41] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 42] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 43] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 44] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Diagram 45] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Figure 46] FIG. 11 is a vertical cross-sectional view of a portion of a curler head according to another embodiment. [Figure 47]13 is a perspective view of a second end of the curler head according to another embodiment. FIG. [Figure 48] FIG. 48 is a perspective view of a first end of the curler head of FIG. 47. [Figure 49] FIG. 48 is a vertical cross-sectional view of a portion of the curler head of FIG. 47. [Figure 50] FIG. 11 is a vertical sectional view of a curler head according to another embodiment. [Figure 51] FIG. 51 is a perspective view of a first end of the curler head of FIG. 50. [Figure 52] 51 is a perspective view of another first end of the curler head of FIG. 50. FIG. [Diagram 53] 51 is a perspective view of a second end of the curler head of FIG. 50. FIG. [Figure 54] FIG. 51 is a top view of the curler head of FIG. 50. [Figure 55] FIG. 51 is a cutaway top view of the curler head of FIG. 50. [Figure 56] 13 is a perspective view of a second end of the curler head according to another embodiment. FIG. [Figure 57] FIG. 11 is a perspective view of a second end of a curler head according to another embodiment. [Figure 58] FIG. 11 is a perspective view of a second end of a curler head according to another embodiment. [Figure 59] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 60] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 61] 13 is a perspective view of a second end of the curler head according to another embodiment. FIG. [Figure 62] FIG. 62 is a perspective view of a first end of the curler head of FIG. 61. [Figure 63] FIG. 62 is a cross-sectional view of the curler head of FIG. 61. [Figure 64] FIG. 62 is a vertical sectional view of the curler head of FIG. 61. [Figure 65] 13 is a perspective view of a second end of the curler head according to another embodiment. FIG. [Figure 66] FIG. 66 is a perspective view of a first end of the curler head of FIG. 65. [Figure 67]FIG. 66 is a cross-sectional view of the curler head of FIG. [Figure 68] FIG. 66 is a vertical sectional view of the curler head of FIG. 65. [Figure 69] FIG. 13 is a perspective view of a first end of a curler head according to another embodiment. [Figure 70] FIG. 70 is a cross-sectional view of the curler head of FIG. 69. [Figure 71] FIG. 70 is a longitudinal sectional view of the curler head of FIG. 69. [Figure 72] FIG. 70 is a cutaway perspective view of the curler head of FIG. 69; [Figure 73] FIG. 13 is a schematic diagram of a curler head according to another embodiment. [Figure 74] FIG. 2 is a schematic diagram of a hair curler device according to another embodiment. [Figure 75] FIG. 2 is a schematic diagram of a hair curler device according to another embodiment. [Figure 76] FIG. 2 is a schematic diagram of the hair curler device of FIG. 1 housed in a charging stand. [Figure 77] 1 is a flowchart of a method for manufacturing a curler head. [Figure 78] FIG. 13 is a top perspective view of a curler head according to another embodiment. [Figure 79] FIG. 79 is a perspective view of a first end of the curler head of FIG. 78. [Figure 80] FIG. 79 is a cross-sectional view of the curler head of FIG. 78. [Figure 81] FIG. 79 is a longitudinal sectional view of the curler head of FIG. 78. [Figure 82] FIG. 79 is a second perspective top view of the curler head of FIG. 78. [Figure 83] FIG. 79 is a cutaway top perspective view of the curler head of FIG. 78; [Figure 84] FIG. 79 is a top perspective view of the main tube of the curler head of FIG. 78. [Figure 85] FIG. 13 is a top perspective view of a curler head according to another embodiment. [Figure 86] FIG. 86 is a perspective view of a first end of the curler head of FIG. 85. [Figure 87] FIG. 86 is a cross-sectional view of the curler head of FIG. 85. [Figure 88] FIG. 86 is a vertical sectional view of the curler head of FIG. 85. [Figure 89] FIG. 86 is a second perspective top view of the curler head of FIG. 85. [Figure 90] FIG. 86 is a cutaway top perspective view of the curler head of FIG. 85; [Figure 91] FIG. 13 is a top view of a curler head according to another embodiment. [Figure 92] FIG. 13 is a top perspective view of a curler head according to another embodiment. [Figure 93] 93 is an enlarged view of a portion of the horizontal and vertical sectional views of the curler head of FIG. 92. [Figure 94] FIG. 93 is a vertical sectional view of the curler head of FIG. 92. [Figure 95] FIG. 93 is a second perspective top view of the curler head of FIG. 92. [Figure 96] FIG. 93 is a cutaway top perspective view of the curler head of FIG. 92; [Figure 97] FIG. 13 is a perspective view of a curler head according to another embodiment. [Figure 98] FIG. 98 is a perspective view of a first end of the curler head of FIG. 97. [Figure 99] FIG. 98 is a cross-sectional view of the curler head of FIG. 97. [Figure 100] FIG. 98 is a vertical sectional view of the curler head of FIG. 97. [Figure 101] FIG. 98 is a second perspective top view of the curler head of FIG. 97. [Figure 102] FIG. 98 is a cutaway top perspective view of the curler head of FIG. 97; [Figure 103] FIG. 98 is a top perspective view of the main tube of the curler head of FIG. 97. [Figure 104] FIG. 13 is a perspective view of a curler head according to another embodiment. [Figure 105] FIG. 105 is a perspective view of a first end of the curler head of FIG. 104. [Fig. 106] FIG. 105 is a cross-sectional view of the curler head of FIG. 104. [Figure 107] FIG. 105 is a vertical sectional view of the curler head of FIG. 104. [Figure 108] FIG. 105 is a second perspective top view of the curler head of FIG. 104. [Fig. 109] FIG. 105 is a cutaway top perspective view of the curler head of FIG. 104; [Figure 110] FIG. 105 is a top perspective view of the main tube of the curler head of FIG. 104. [Figure 111] FIG. 13 is a perspective view of a curler head according to another embodiment. [Figure 112] FIG. 112 is a perspective view of a first end of the curler head of FIG. [Figure 113] FIG. 112 is a cross-sectional view of the curler head of FIG. [Fig. 114] FIG. 112 is a vertical sectional view of the curler head of FIG. [Fig. 115] FIG. 112 is a second perspective top view of the curler head of FIG. 111. [Fig. 116] FIG. 112 is a cutaway top perspective view of the curler head of FIG. 111; [Figure 117] FIG. 112 is a top perspective view of the main tube of the curler head of FIG. 111. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0044] The drawings included herein are for the purpose of illustrating various examples of the articles, methods, and apparatus of the teachings herein and are not intended to limit the scope of the teachings in any way.

[0045] Various apparatus, methods, and compositions are described below to provide examples of embodiments of each claimed invention. Any embodiment described below does not limit any claimed invention, and any claimed invention may include apparatus and methods other than those described below. The claimed invention is not limited to apparatus, methods, and compositions having all of the features of any one apparatus, method, or composition described below, nor to features common to more than one or all of the apparatus, methods, or compositions described below. An apparatus, method, or composition described below may not be an embodiment of any claimed invention. Any invention disclosed in the apparatus, method, or composition described below that is not claimed in this document may be the subject of other means of protection, such as a continuing patent application, and the applicant, inventor, and / or owner does not intend to relinquish, abandon, or make available to the public any such invention by disclosing it in this document.

[0046] The terms "one embodiment," "embodiment," "embodiments," "the embodiment," "the embodiment," "one or more embodiments," "some embodiments," and "one embodiment" mean "one or more, but not all, embodiments of the present invention," unless expressly specified otherwise.

[0047] The terms "including" and "comprising" and variations thereof mean "including, but not limited to," unless expressly stated otherwise. A list of items does not imply that any or all of the items are mutually exclusive, unless expressly stated otherwise. The terms "a," "an," and "the" mean "one or more," unless expressly stated otherwise.

[0048] As used herein and in the claims, two or more members are said to be "coupled," "connected," "attached," or "fastened" when the members are joined or operated together directly or indirectly (i.e., through one or more intermediate members) to the extent that a connection occurs. As used herein and in the claims, two or more members are said to be "directly coupled," "directly connected," "directly attached," or "directly fastened" when the members are connected in physical contact with one another. None of the terms "coupled," "connected," "attached," and "fastened" distinguish between the manner in which two or more members are joined together.

[0049] Further, it will be understood that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or similar elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, those skilled in the art will understand that the example embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to obscure the example embodiments described herein. Additionally, the description should not be considered as limiting the scope of the example embodiments described herein.

[0050] General Description of Hair Curling Machine Referring to Figure 1, an exemplary embodiment of a hair curling device is shown generally at 100. The exemplary hair curling device 100 of Figure 1 is a handheld hair curling device that can be generally operated with one hand to curl hair while holding its weight in one hand.

[0051] The hair curling device 100 includes a curler head 102. The curler head 102 is also referred to herein as a hair curler. The curler head 102 includes a body 104. The body 104 may be of any suitable shape, such as cylindrical, ovoid, or conical. The body has a centrally located, longitudinally extending shaft 110 that extends between a head first end 112 and a head second end 114. The curler head is elongated along the longitudinal axis 110 and receives and supports hair wrapped about the longitudinal axis 110.

[0052] 2-9, in the illustrated example, the body 104 is a generally cylindrical housing extending along a longitudinal axis 110. The curler head 102 can be of any suitable size. In some examples, the curler head has a diameter 124 (FIG. 5) between 12 mm and 50 mm, between 15 mm and 40 mm, or between 18 mm and 35 mm. The body 104 includes a body sidewall 120 that extends between a head first end 112 and a head second end 114. It will be appreciated that the curler head may be of any shape and size.

[0053] 2-9, the exemplary body 104 includes an end wall 122 (FIG. 6) that closes the head second end 114. The end wall 122 can extend generally transverse to the longitudinal axis 110. The end wall 122 can be generally planar. In use, the second end 114 can be closed. In some examples, the second end 114 can be selectively openable. With reference to FIG. 81, the exemplary end wall 122 can be selectively removable to open the second end 114. Alternatively, the end wall can be movably attached (e.g., translatably or rotatably) to open a portion or all of the second end, or can have a movable flap that is opened when an accessory tool is attached to the second end of the curler head.

[0054] With reference to FIG. 6, the exemplary curler head 102 includes a head air passage 130 extending through the body 104. The head air passage 130 may take any suitable route, such as linear or non-linear, single flow or counter flow, through the curler head 102 between the inlet and the outlet. With reference to FIGS. 2-9, the exemplary curler head has a head air passage 130 that is a single flow path. With reference to FIGS. 2-9, the exemplary curler head has a head air passage 130 that is a generally straight air passage. The single flow and / or straight path reduces back pressure caused by changes in air flow direction. The head air passage 130 may extend generally parallel to the longitudinal axis 110. It will be appreciated that the head air passage 130 may be provided by a hollow interior of the curler head or by one or more conduits located within or forming the curler head.

[0055] A head air inlet 132 leads into the head air flow passage. The head air inlet may be at any suitable location on the body and may be of any suitable type. In some examples, the head air inlet 132 is at an end of the body 104. Having the head air inlet at the end of the body allows the single-flow air flow passage to extend through a greater length of the body than if the air flow inlet were at the middle portion of the body. With reference to Figures 2-9, the head air inlet 132 is at a first end 112 of the body 104, also referred to herein as the inlet end 112 of the body 104. The head air inlet 132 may be any suitable type of inlet, such as a tangential inlet or an axial inlet. With reference to Figure 6, the exemplary head air inlet 132 is an axial inlet. Air entering the air inlet travels generally parallel to the longitudinal axis 110 while passing through the air inlet. An axial air inlet reduces back pressure and turbulence.

[0056] Opening from the head air passage is a head air outlet 134. The head air outlet 134 includes an exit port 136 (see FIG. 4). It will be appreciated that the exit port 136 may have any suitable shape, such as generally oval, generally circular, generally rectangular, generally square, or generally slot-shaped (having a width that is much greater than its height, such as at least 5 times). Referring now to FIGS. 10-18, an exemplary head air outlet 134 consists of an exit port 136, and the characteristics of the air flow through the air outlet (e.g., the velocity, direction, and cross-sectional shape of the air stream exiting the exit port 136 transverse to the direction of air flow) are determined by the orientation of the exit port 136 and the shape of the air passage 110 upstream of the exit port and / or the exit port 136.

[0057] The head air outlet 134 may be a curler outlet 150 or may be an outlet for a different purpose, such as an exhaust outlet or a diffuser outlet, in which case such an outlet may be at a second end of the curler head and therefore may be referred to as the outlet end of the curler head.

[0058] The curler outlet 150 is positioned and shaped to provide an airflow stream for positioning the user's hair in a curling action. As illustrated in FIG. 4, the head air outlet 134 also includes a duct 138 upstream of the outlet port 136 from which the outlet port 136 opens. The duct 138 directs the airflow through the air outlet and / or shapes the airflow exiting the outlet. With reference to FIG. 4, the exemplary air outlet 134 includes a duct 138 extending between the inlet port 140 and the outlet port 136.

[0059] Any suitable inlet port 140 and / or outlet port 136 may be used. In some examples, the inlet port 140 is a slot-shaped port. With reference to Figs. 104-110, an exemplary inlet end segment 280 at the inlet end 112 includes a slot-shaped inlet port 140 (Figs. 107 and 110). The slot-shaped port 140 includes a major dimension 141 and a minor dimension 143, where the major dimension 141 may be at least three times, at least four times, or at least five times the size of the minor dimension 143. The major dimension of the slot-shaped port 140 may extend annularly (angularly) about the longitudinal axis 110. The curler head 102 may include multiple slot-shaped ports 140 forming an annular ring. A curler outlet 150 or a set 151 of annularly arranged outlets 150 may be provided by one or more annular rings of the slot-shaped ports 140. 104-110, the exemplary head 102 includes a plurality of slot-shaped ports 140 that form two annular rings of inlet ports 140. The slot-shaped inlet ports 140 can form any suitable number of annular rings of inlet ports for a given segment 280. With reference to FIGS. 111-117, the exemplary head 102 includes one ring of slot-shaped inlet ports 140 for the curler segment 280a closest to the inlet end 112, two rings of slot-shaped inlet ports 140 for the next curler segment 280a along the axis 110 toward the opposite (tip) end 114, and so on.

[0060] Disposed within the duct are one or more air guide members or vanes 142 (see, for example, vanes 142 in FIG. 8, where the vanes 142 define opposing sidewalls of the duct 138). The air guide members or vanes 142 help to guide the airflow through the duct and / or shape the airflow exiting the air outlet.

[0061] 2-9, and in particular FIG. 7, an exemplary curler outlet 150 is located in the body sidewall 120 of the body 104. The curler outlet 150 can generate an airflow that is directed at least partially radially around the outer surface of the curler head. Thus, the airflow can be directed partially tangentially or tangentially, and the curler outlet 150 can be a tangential outlet. A tangential outlet is shaped to direct the airflow to exit the air outlet along an outlet vector 152 that includes a tangential component 154 that is tangential to the longitudinal axis 110. The tangential component 154 helps position the hair in a curled state relative to the longitudinal axis 110. The tangential component 154 can comprise at least 25%, at least 30%, or at least 40% of the outlet vector 152. In some examples, the tangential component 154 comprises at least 50% of the outlet vector 152. In some examples, the tangential component 154 constitutes substantially all of the exit vector 152 .

[0062] In some examples, the air outlets of the curler head 102 have a radially outer surface (e.g., outer wall 260, see FIG. 42) that is located radially outward of an adjacent land portion 160 at the outlet port 136. The land portion 160 (sometimes referred to as a land surface), such as a closed wall portion as illustrated in FIG. 6, is partially or completely air impermeable. The radially outer surface that is radially outward of an adjacent land 160 portion enables the air outlet to direct air along an outlet vector that has a tangential component along the land portion.

[0063] In some examples, the curler outlet 150 directs the airflow across the land surface 160 of the body sidewall 120. The exit port 136 of the curler outlet 150 is radially outward of the land surface 160. It will be appreciated that in some examples, the radially inner end of the exit port 136 touches the land surface 160, but in some examples, the port may be adjacent to the land surface without touching it (e.g., the port is located radially outward of the land portion 160, see FIG. 93). The airflow directed across the surface can flow along the surface (e.g., by the Coanda effect). Thus, hairs drawn by the airflow are drawn across the surface. Drawing the hair to the surface helps position the hair against the body sidewall 120. In some examples, the land surface 160 is curved with respect to the exit vector 152. 2-9, the exemplary land surface 160 is a curved surface relative to the exit vector 152 such that the air flow attached to the land surface 160 causes hair attached to the land surface 160 to be drawn along the curvature of the land surface 160. As illustrated, the land portion 160 is curved in a plane transverse to the longitudinal axis 110. The curved land surface 160 aids in shaping a user's hair into a curl for a curling action. However, the curler exit 150 may not direct the air across the land surface. Now referring to FIGS. 10-18, the exemplary curler exit 150 does not direct the air stream across the land surface.

[0064] 2-9, the one or more curler outlets are positioned to provide airflow at multiple locations about the longitudinal axis 110. As illustrated, the multiple outlet ports 136 radially outward of the land portion 160 extend 360° about the axis 110. By providing airflow at multiple locations about the longitudinal axis 110, the hair can be encouraged to curl about the longitudinal axis 110.

[0065] 2-9, the one or more curler outlets are positioned to provide airflow at multiple locations along the length of the longitudinal axis 110. By providing airflow at multiple locations along the length of the longitudinal axis, a larger work surface (e.g., multiple land portions 160) can be provided to the user for receiving the user's hair than if the airflow was restricted to only the longitudinal portions of the sidewalls.

[0066] Airflow at multiple locations around and / or along the longitudinal axis can be provided by the same air outlet or by multiple separate air outlets. In some examples, curler head 102 includes only a single curler outlet 150, such as when curler outlet 150 is a spiral slot between first end 112 and second end 114 of curler head 102. The slot may be interrupted by supports (e.g., to hold the slot edges in place) and / or vanes to direct the airflow. In some examples, curler head 102 includes multiple curler outlets 150 (e.g., outlets 150 in Figures 2-9). Multiple curler outlets 150 can provide better airflow control than a single outlet. As further described elsewhere herein, multiple curler outlets 150 can be axially and / or angularly spaced apart from one another and / or radially, circumferentially, and / or longitudinally staggered. Curler outlet 150 can be any of the curler outlets described herein.

[0067] 2-9, in some examples, the head air flow path 130 includes an air passage 170 in the body 104. In some examples, the air passage 170 includes at least one passage inlet 172 and at least one passage outlet 174. It will be appreciated that the air passage 170 may be a hollow interior of the body. Alternatively, the air passage 170 may be one or more separate conduits disposed in and / or forming the curler head. For example, the curler head 102 includes two or more air passages 170, such as multiple primary air flow passages 290, and / or one or more primary air flow passages 290 and one or more secondary air flow passages 292 as described elsewhere herein (see, e.g., FIG. 17).

[0068] Each conduit or hollow interior may have one or more air inlets 172 and one or more air outlets 174. The air outlets may be curler outlets 150 and / or outlets at the second end (if end wall 122 is not present, see e.g., FIG. 6).

[0069] Optionally, the minimum cross-sectional airflow area of ​​passageway outlet 174 (i.e., the airflow area perpendicular to the airflow direction at its minimum point) may be less than the minimum cross-sectional airflow area of ​​passageway inlet 172 to facilitate a pressure build-up in the chamber. In such a case, air passageway 170 may also be referred to herein as a pressure chamber. Alternatively or in addition, the cross-sectional airflow area of ​​curler outlet 150 may be sized to produce a generally constant amount of airflow (amount per minute in each ring 246 along the axial length of the curler head).

[0070] As illustrated in FIGS. 2-9, the air passage 170 includes an inlet at a first end 176, a second end 178 opposite the first end is closed by the second end wall 122, and an exemplary chamber inlet 172 is the open end of the first end 176. In some examples, the head air flow path comprises the air passage 170. With reference to FIGS. 2-9, and particularly to FIG. 6, the air passage air inlet 172 is the head air inlet 132, and the air passage air outlet 174 is the head air outlet 134. The air passage 170 may be a manifold that is upstream and in flow communication with a number of curler outlets 150. The air passage 170 may be any suitable shape, such as cylindrical, ovoid, or conical. The air passage 170 may have a shape generally the same as the shape of the body 104. With reference to FIGS. 2-9, the exemplary pneumatic chamber 170 has a generally cylindrical shape extending between a chamber first end 176 and a chamber second end 178 .

[0071] Referring again to FIG. 1 , the hair curling device 100 also includes an air movement member 180 in fluid communication with the head air passage 130 of the curler head 102 when the hair curling device 100 is in use. The air movement member 180 is provided to generate airflow through the air passage, and any air movement member may be used. The air movement member 180 may include a motor and fan assembly. The motor and fan assembly includes a motor and at least one fan in air flow communication with the head air passage 130. As illustrated, the air movement member is upstream of the curler outlet to force air through the curler outlet. In other embodiments, the air movement member may be downstream of some or all of the air outlets 174.

[0072] The air movement member 180 may be part of the curler head 102 or may be on a detachable blower 182 (e.g., a hair dryer). In some examples, the curler head 102 is an attachment that is removably attached to the blower 182. With reference to FIG. 1 , the exemplary blower 182 is a hair dryer that is operable to be used as a hair dryer with the curler head detached, and the curler head 102 is an attachment that is removably attachable to the hair dryer. It will be understood that in some examples, as described further elsewhere herein, the air movement member 180 is provided as part of the curler head, e.g., within the body 104 of the curler head 102, and the curler head 102 is operable to be used alone as a curler.

[0073] The accessory curler head 102 and the separable blower 182 may be joined by a releasable coupling 184. Any releasable coupling 184 may be used. The releasable coupling includes a releasable fastener 186 on the head and / or blower. It will be appreciated that the fastener 186 may be any suitable fastener, such as a screw fastener, a bayonet mount, a magnetic fastener, a clasp fastener, or a snap fastener. With reference to FIGS. 2-9, an exemplary fastener 186 on the curler head 102 is a slot for receiving a protrusion (e.g., a pin) on the blower to releasably secure the curler head to the blower. With reference to FIG. 1, a first end of the exemplary accessory curler head is received within an outlet opening 188 of the separable blower 182. It will be appreciated that the coupling between the head and the blower may be a fluid-tight coupling. It will also be appreciated that the outlet of the blower may be the same as the air passage air inlet 172 of the curler head.

[0074] The hair curling device 100 may alternatively or additionally include one or more heating elements 191. Any suitable element that applies thermal energy to the hair and / or the air flow and / or one or more surfaces of the curler head itself may be used as the heating element 191. As illustrated in FIG. 1, the heating element 191 is an electrical current heating element 190 that includes a resistor that converts electrical energy into thermal energy. The exemplary electrical current heating element 190 of FIG. 1 is disposed in the air flow path of the hair dryer to heat the air flowing past the resistor. Alternatively, the heating element may be a thin-film electric heating element that may be attached to the inner surface of the curler head.

[0075] Alternatively or in addition, the heating member 191 may include an infrared absorbing member 370. The energized heating element 190 may be an infrared radiation source arranged to direct infrared energy towards the infrared absorbing member. Referring to FIG. 88, an exemplary infrared absorbing member 370 is arranged to receive infrared radiation from an energized infrared heating element 190. The use of an infrared absorbing member 370 allows for a greater variety of shapes and positions of the heating member 191 than using only an energized heating element 190, such as any of those described in more detail elsewhere herein. The infrared absorbing member 370 is heated by an energized infrared radiation source 190, which may be part of the curler head 102 or may be an energized heating element 190 of a blower 182 used in cooperation with the curler head 102.

[0076] Heating member 191 may be in any suitable location and may be of any suitable shape. Heating element 190 that directly heats air or infrared absorbing member 370 may be in any suitable location in direct communication with air flow passage 130, such as radially below curler outlet 150 or in a closed segment 222 of body side wall 120 where no curler outlet is provided. For example, referring to Figs. 73 and 74, an exemplary curler head 102 includes heating element 190 radially below one or more curler outlets 150. The exemplary curler head of Figs. 73 and 74 is still removably securable to blower 182 in which air movement member 180 is provided.

[0077] Alternatively or additionally, a heating member 191, such as infrared absorbing member 370, can be in conductive thermal communication with the hair wrapped about curler head 102 (e.g., an infrared absorbing member including a metal or metal-filled plastic forming land portion 160, or a heating element 190 forming or in direct conductive thermal communication with land portion 160). Thus, a heating member 191, such as infrared absorbing member 370, can be in thermal communication with the curler head, such as an inner and / or outer surface of the curler head, to heat part or all of the curler head in addition to or instead of heating the air in the airflow passages.

[0078] Alternatively or additionally, the heating element 191 may be positioned to direct infrared energy directly at the hair wrapped about the curler head (e.g., an infrared radiation source on the surface of the curler head 102, or within the curler head 102 but covered only by an infrared transparent material). It will be appreciated that the infrared heating element 190 that generates the infrared radiation to provide heat may be within the air flow path 130 or outside of the air flow path 130 (i.e., does not have to be within the air flow path 130). Removing the heating element 190 from the air flow path 130 reduces back pressure. The heating element 191 positioned in conductive thermal communication with the hair wrapped about the curler head 102 may also act as an infrared radiation source due to the temperature and material of the heating element 191.

[0079] The electrical heating element 190 may be part of the curler head 102 or may be upstream of the curler head, such as in the blower 182 if the curler head 102 is removably attachable to the blower 182. With reference to FIG. 1, an exemplary hair curling device 100 includes a heating element 190 and an air movement member 180 in the blower 182. Thus, the blower 182 can be used for other purposes, such as being used as a hair dryer without the curler head 102. However, in some examples, the curler head 102 includes the heating element 190 instead of (e.g., if the blower does not include a heating element or if the curler head 102 can be used without a blower) or in addition to the heating element in the blower. Including a heating element in the curler head 102 allows for greater control over heating. With reference to FIG. 75, an exemplary curler head includes a heating element 190 and an air movement member 180 and is usable independently of the blower. It will be appreciated that the hair curling device 100 and / or curler head 102 may include more than one heating element 190 and may include different types of heating elements 190. It will also be appreciated that, as will be discussed below, the curler head, if it includes an electrically powered element, may include an electrical connector (e.g., a female electrical connector) that mates with an electrical connector (e.g., a male electrical connector) of the blower when the curler head is attached to the blower.

[0080] The hair curling device 100 may optionally include a handle 192 having a hand grip portion 194. The handle may be any suitable handle that allows a user to apply the curler head to the user's hair. With reference to FIG. 1, the exemplary handle 192 includes a hand grip portion 194 that extends along a handle axis 196 that is generally parallel to the longitudinal axis 110 of the curler head 102. As illustrated, the hand grip portion is part of the exterior surface of the blower. In some examples, the handle axis 196 is generally coaxial with the longitudinal axis 110. However, it will be understood that in some examples, the handle axis 196 may be angled relative to the longitudinal axis, such as a pistol grip handle. For example, the handle may be a pistol grip handle that is attached to a sidewall of the blower (e.g., at its rear end), or the handle may be attached to the rear end.

[0081] If the curler head 102 is an attachment, the handle 192 may be provided on another component of the hair curling device 100, such as the blower 182. Optionally, the handle 192 is on a member of the hair curling device 100 that includes the heaviest component of the hair curling device 100, which is typically the air movement member 180 and / or the energy storage member. With reference to FIG. 1 , the exemplary handle 192 is part of the blower 182, and the curler head 102 is an attachment that is removably attached to the blower 182. However, in some examples, the handle 192 is on the curler head 102. With reference to FIG. 75 , the exemplary handle 192 is on the curler head 102 rather than a separate blower, and the curler head 102 includes the air movement member 180 within the head.

[0082] Air movement member 180 rotates about an axis of rotation 198 (e.g., a motor axis of rotation of a motor and fan assembly). With reference to FIG. 1 , an exemplary axis of rotation 198 is generally parallel to longitudinal axis 110 of curler head 102. An axis of rotation 198 generally parallel to the longitudinal axis of the curler head may improve the feel of device 100 in the hand. Rotation axis 198 may be generally coaxial with longitudinal axis 110. An axis of rotation generally coaxial with the longitudinal axis may improve the feel of device 100 in the hand. However, it will be understood that rotation axis 198 may be at any angle relative to longitudinal axis 110.

[0083] The air movement member 180 and / or the heating element 190 are powered. The curler apparatus 100 may also include one or more additional powered components, such as a touch screen or other control interface. Power is provided by one or more on-board energy storage devices 200 (e.g., one or more batteries, one or more capacitors, and / or a removable pack of batteries or capacitors) and / or by an external source (e.g., via a power cord). With reference to FIG. 1, the exemplary hair curling apparatus 100 includes a power cord 202 electrically coupled to and providing power to the air movement member 180 and the heating element 190. The power cord 202 is connectable to a household mains power supply. It will be understood that the power cord and / or the energy storage member may be provided in any suitable location. Optionally, the power cord 202 may be plugged into the blower 182 (e.g., attached or removably attached to the blower 182) and / or the energy storage member may be located within the blower. The coupling 184 between the blower 182 and the curler head 102 may include a power transfer coupling if the curler head 102 includes a powered component (e.g., if the blower includes an air moving member and the curler head includes a heating element). Optionally, for example, if the curler head is operable to be used alone, the power cord 202 may plug directly into the curler head and / or an energy storage member may be located in the curler head.

[0084] The following is a discussion of a number of aspects disclosed herein, namely annular set of curler outlets, shifted adjacent curler outlets, longitudinally spaced air outlets, longitudinally directed air flow, annular bands of curler outlets, bidirectional curler outlets, curler outlets with varying cross air flow area, air flow textured land portions, grip textured hair receiving surfaces, thermally conductive hair receiving surfaces, land surfaces with varying radial extent, longitudinally reducing outlet air flow area, longitudinally narrowing head air flow passages, valve reconfigurable air flow direction, secondary application outlets, bleed valves, axially extending surface depressions, first end without curler outlets, supplemental second end heating, air movement members within the curler head, heating members within the curler head, direct hair heating, inductive charging, methods of manufacture using separately formed rings and tubes, user interfaces, and accessories. Each aspect can be used alone or in combination or subcombination with one or more of the other aspects disclosed herein.

[0085] Carla Exit Circular Set The following is a description of curler head 102 having curler outlet 150. According to this embodiment, any configuration of curler outlet 150 can be used.

[0086] As illustrated in FIGS. 2-9, the outlets 150 can be arranged in one or more annular sets 151 or rings to form a band of outlets. An annular set includes multiple curler outlets 150 positioned angularly about some or all of the longitudinal axis 110. The curler outlets may be positioned adjacent to one another (e.g., the outlet ports 136 may extend generally continuously about some or all of the longitudinal axis 110) or may be spaced apart. For example, a single annular set of curler outlets may include four, five, six, seven, eight or more curler outlets 150. As illustrated in FIG. 7, the outlet ports 136 are positioned adjacent to one another and the outlets 150 extend continuously about the longitudinal axis 150.

[0087] The curler head 102 may include a single annular set or multiple annular sets. If multiple annular sets are provided, the annular sets may be spaced apart along some or all of the length of the curler head. As illustrated in FIG. 2, the curler head 102 includes five annular sets of outlets separated by land portions 160. All of the outlets in a single annular set may be the same, or some or all may be different. Alternatively or additionally, each annular set may be the same, or some or all may be different.

[0088] As illustrated in FIG. 3 , the outlet ports 136 of each annular set can be generally aligned with some or all of the outlet ports in the other annular sets, thereby forming longitudinally contiguous sets that together form multiple rows of outlet ports 136, with each set extending along the longitudinal axis 110.

[0089] Alternatively, the outlets may be arranged in a generally linear or helical row. The outlets 150 may be axially positioned without land portions between them. As illustrated in FIGS. 20-24, the outlet ports 136 of an annular set 151 of curler outlets are angularly aligned to extend in a plurality of longitudinal rows 153 generally parallel to the longitudinal axis 110. As illustrated in FIG. 20, the set 151 includes a first set 151a of open curler outlets 150, a second set 151b of open curler outlets 150, and a third set 151c of open curler outlets 150. The outlet ports 136 of the exemplary first set 151a are axially aligned with the outlet ports 136 of the exemplary second set 151b and the outlet ports 136 of the exemplary third set 151c. With further reference to Figures 20-24, the illustrative first set 151a, second set 151b and third set 151c of curler outlets 150 define a plurality of axially extending rows 153 of axially aligned outlet ports 136 (e.g., linear rows 153).

[0090] Alternatively, as illustrated in Figures 69 and 71, the exit ports 136 may extend axially at an angle relative to the axis 110, as described below under the heading of shifted adjacent curler exits. With reference to Figure 91, the exit ports 136 extend at an angle 137 relative to the axis 110. With reference to Figures 69-72, the exemplary curler head 102 includes rows 153 of exit ports 136 that are not axially aligned. The exemplary rows 153 in Figures 69-72 are helical. For each row of exit ports in the exemplary curler head 102 of Figures 69-72, the exit ports 136 are positioned at an angle about the longitudinal axis. For each row 153 of outlet ports 136, the outlet ports 136 of the second set of outlet ports 151b are positioned at an angle about the longitudinal axis 110 from the outlet ports 136 of the first set of outlet ports 151a, and the outlet ports of the third set of outlet ports 151c are positioned at an angle about the longitudinal axis 110 from the outlet ports of the second set of outlet ports 151b.

[0091] Shifted adjacent car exit The following is a description of a curler head according to this embodiment having multiple curler outlets, where longitudinally successive curler outlets are radially and / or angularly shifted from one another. Any configuration of curler outlets 150 may be used.

[0092] Radially shifted curler outlets 150 extend at different radial distances from the axial center of the curler head. The radial distance may decrease or increase at a constant rate along any portion of the length of the curler head, and / or the radial distance may increase or decrease in a step pattern.

[0093] 65-68, exemplary curler outlets 150 are arranged such that longitudinally successive curler outlets are radially shifted relative to one another. Curler head 102 includes first curler outlet 150e and second curler outlet 150f that is longitudinally successive with respect to the first curler outlet (i.e., successive along longitudinal axis 110, either directly adjacent to or separated by closed land portion 160 of curler head 102). With reference to FIGS. 65-68, exemplary first outlet 150e is at a first location a first radial distance away from longitudinal axis 110, and exemplary second curler outlet 150f is at a second location a second radial distance away from longitudinal axis 110, the second radial distance being less than the first radial distance. In some examples, the curler head includes curler outlets at three or more radial distances from the longitudinal axis 110, where the radial distances of the curler outlets decrease regularly along the longitudinal axis. With reference to Figures 65-68, an exemplary curler head includes curler outlets at five radial distances where the radial distances of the curler outlets decrease regularly along the longitudinal axis.

[0094] The angularly shifted outlets can, for example, form a helical row of outlet ports extending along the longitudinal axis. Optionally, the curler outlets can be staggered such that every other curler outlet along the longitudinal axis is axially aligned with an intervening outlet that is angularly or radially shifted relative to the other.

[0095] 69-72, the exemplary curler outlets are arranged such that longitudinally adjacent curler outlets are angularly shifted relative to one another, with exemplary first curler outlet 150e being in a first angular position and exemplary second curler outlet 150f being in a second angular position different from the first angular position. With reference to Figures 69-72, the exemplary curler head includes staggered curler outlets 150, with every other longitudinally successive curler outlet being longitudinally aligned.

[0096] Longitudinally spaced air outlets The following is a description of curler head 102 according to this embodiment having multiple curler outlets, longitudinally consecutive open curler outlets longitudinally spaced from one another by closed land portions of the body sidewall. Any configuration of curler outlets 150 can be used.

[0097] Curler outlets 150 may be arranged in sets, with the curler outlets of each set either angularly positioned about the longitudinal axis or axially aligned, as discussed above.

[0098] As previously discussed, the curler head can include a plurality of land portions 160 disposed continuously along the length of the curler head. The land portions 160 separate axially spaced curler outlets 150, such as the annular set of curler outlets previously discussed. As illustrated in Figures 2-9, the land portions 160 of the body sidewall are normally closed portions, such as a continuous wall.

[0099] Alternatively, the closed portion of the body sidewall may include selectively openable curler outlets, such that the sidewall of the curler head is selectively openable. As discussed below, the curler head may be adjustable to direct air in a clockwise and counterclockwise direction. In such a case, the curler head 102 may include a curler outlet 150 oriented clockwise and a separate curler outlet 150 oriented counterclockwise. The clockwise and counterclockwise outlets are selectively openable. The curler head may be selectively switchable between a clockwise and a counterclockwise configuration by opening one set or the other of the outlets (e.g., via selective reconfiguration of the valve assembly or the curler head). For example, the clockwise outlets may be open and the counterclockwise outlets may be closed. Thus, the counterclockwise outlets define a closed portion of the body sidewall when closed.

[0100] 2-9, the longitudinal spacing between the longitudinally spaced outlets 150 provides a longitudinally extending hair receiving surface 210 between the curler outlets. The hair receiving surface allows hair wrapped around the body sidewall 120 to be stabilized against the body sidewall. The longitudinally extending hair receiving surface can improve the user experience and / or allow the body sidewall to better interact with the hair (e.g., for heat transfer or hair retention, as further described elsewhere herein). In some examples, longitudinally consecutive curler outlets are longitudinally spaced apart by at least 2, at least 3, or at least 4 times the average longitudinal extent of the curler outlets 150. In some examples, longitudinally consecutive curler outlets are longitudinally spaced apart by at least 4 mm, at least 6 mm, or at least 8 mm.

[0101] In some examples, the land portion or closed body sidewall adjacent to the curler outlet is a closed longitudinal segment. For example, the closed longitudinal segment of the generally cylindrical body sidewall 120 is a closed annular portion of the body sidewall. The closed longitudinal segment allows the hair to wrap around the longitudinal axis against the body sidewall. With reference to Figures 2-9, the exemplary curler head 102 has a closed longitudinal segment 222. The closed longitudinal segment 222 of the exemplary curler head 102 of Figures 2-9 is an annular ring and forms a land portion 160 across which the adjacent curler outlet can direct airflow.

[0102] If the closed portion of the body sidewall includes closed curler outlets, the longitudinal spacing provides space for those closed outlets, allowing, for example, a user to switch between clockwise and counterclockwise configurations of the curler head by closing one set of outlets and opening another set for each configuration. With reference to FIGS. 20-24, an exemplary curler head 102 has open curler outlets 150 separated by a closed portion 220 of the body sidewall. The curler outlets 150 are arranged in sets of curler outlets 150 positioned at an angle relative to the longitudinal axis. The exemplary curler head 102 of FIGS. 20-24 includes a first set of curler outlets 150a oriented clockwise and a second set of curler outlets 150b oriented counterclockwise. The open curler outlets 150 are the outlets of one set while the other set is closed. Thus, longitudinally consecutive curler outlets of a common set are longitudinally spaced apart from one another and, when open, are separated by closed portion 220 of the body sidewall that includes the closed outlets of the other set. With reference to Figures 20-24, when one of sets 150a, 150b is open and the other is closed, land portion 160 includes first section 222a positioned between first set 151a and second set 151b of curler outlets 150 and second section 222b positioned between second set 151b and third set 151c of curler outlets 150. It will be appreciated that additional sets of open curler outlets and sections of land portion 160 may be included.

[0103] Longitudinal air flow The following is a description of a longitudinally oriented curler exit airflow. According to this embodiment, curler exit 150 is shaped such that airflow exit vector 152 includes a longitudinal component 230, but optionally also includes a component that is angularly oriented about the curler head. Any configuration of curler exit 150 can be used.

[0104] It will be appreciated that the exit vector 152 of the curler exit 150, which includes the longitudinal component 230, may also optionally include a tangential or radial component. The tangential component provides a curling force that helps wrap the hair around the curler head, or to wrap the hair around the curler head without the user having to rotate the curler head to wrap the hair around the curler head.

[0105] 7, in some examples, the exit vector 152 has an angle 232 with respect to a plane perpendicular to the longitudinal axis, the angle being between 10° and 30°, between 15° and 25°, between 17° and 23°, or about 20°. In some embodiments, the tangential component 154 of the exit vector of the curler exit 150 may be at least 25%, at least 50%, or at least 60% of the exit vector 152, with the remainder being the longitudinal component, while in other embodiments, the tangential component 154 may be less than 25%, less than 10%, or in some examples, negligible (e.g., less than 5%). The longitudinal component 230 may make up at least 25%, at least 30%, or at least 40% of the exit vector 152. For example, the longitudinal component 230 may be between 15% and 75%, between 30% and 75%, or between 30% and 60%.

[0106] Referring to FIG. 7, by including a longitudinal component 230 in the outlet vector 152, the curler outlet can at least aid in positioning the hair against a longitudinally adjacent portion of the curler head 102, such as the closed portion 220 of the body sidewall, such as the closed longitudinal segment 222 (which may be a land portion 160), and hair overlying the closed portion of the body sidewall can be positioned by airflow from the longitudinally adjacent curler outlet.

[0107] 2-9, curler outlet 150 is shaped to direct exiting air along an outlet vector 152 that includes a longitudinal component. With reference to FIG. 4, exemplary outlet vector 152 is defined by the shape of duct 138, such as by vanes 142. In some examples, the outlet end of duct 138 extends in a direction that includes tangential and longitudinal components relative to longitudinal axis 110.

[0108] The longitudinal component 230 of the exit vector may be selected based on the airflow velocity and / or volumetric flow rate of the airflow in combination with the axial length of the longitudinal segment 222 around which the user's hair is intended to wrap. Optionally, the longitudinal component is sufficient such that the curling force of the air (resulting in a tangential component of the air exiting the exit port 136) extends across all or substantially all of the adjacent longitudinal segments 222.

[0109] In some examples, the angle of longitudinal component 230 is proportional to the magnitude of the longitudinal spacing between the curling outlets (e.g., spaced-apart annular sets of curler outlets) and / or inversely proportional to the air velocity and / or volumetric airflow rate exiting the curler outlets. For example, the longer the axial length of closed longitudinal segment 222, the larger the angle of longitudinal component 230 can be. The greater the air velocity and / or volumetric airflow rate exiting the curler outlets, the smaller the angle of longitudinal component 230 can be.

[0110] It will be appreciated that if air is directed onto the closed longitudinal segment 222 from each axial end thereof, for example, if the closed longitudinal segment 222 is located between two axially spaced annular sets of bidirectional curler outlets 150c, as illustrated in FIG. 33 and discussed later, the longitudinal component 230 may be reduced because air from each bidirectional curler outlet 150c is directed onto the closed longitudinal segment 222, essentially air exiting one of the bidirectional curler outlets 150c may extend across only about half of the axial length of the closed longitudinal segment 222. If air is instead directed onto the closed longitudinal segment 222 from only one annular set of curler outlets (e.g., one-way curler outlet 150d, as illustrated in FIG. 33 and discussed later), air exiting one-way curler outlet 150d may extend across the entire axial length of the closed longitudinal segment 222.

[0111] Circular strip at the exit of Carla The following is a description of the annular band or ring 246 of curler air outlets 150. According to this embodiment, multiple curler outlets 150 are disposed at least partially (e.g., 50%, 60%, 75%) around the longitudinal axis 110 of the curler head, optionally entirely or essentially entirely around the longitudinal axis 110 of the curler head. The curler outlets 150 may be spaced apart or adjacent to one another. Any configuration of curler outlets 150 may be used.

[0112] The curler outlets 150 of the band 246 may be flush with the outer surface of the curler head (e.g., the outlet ports 136 may be flush with the outer surface, as illustrated in FIG. 63), or may be positioned radially outward of the outer surface of an adjacent land portion 160 (e.g., some or all of the outlet ports 136 may be radially outward of the outer surface of an adjacent land portion, as illustrated in FIG. 2).

[0113] As discussed below, the swaths 246 of curler outlet 150 may be unidirectional or bidirectional. Alternatively or in addition, curler outlet 150 may direct the air axially, radially, or a combination thereof, as discussed above. Thus, as discussed above, curler outlet 150 may direct the airflow along an outlet vector having a tangential component such that swaths 246 generate a conical or cylindrical airflow.

[0114] The multiple annular bands of curler air outlets may be separated from one another by land portions 160 or may be positioned adjacent to one another, as discussed herein.

[0115] 2-9, the curler outlet of the curler air outlet annular strip 150 includes a duct 138 that extends between an inlet port 140 and an outlet port 136. The duct 138 of the exemplary curler outlet annular strip 150 of FIGS. 2-9 extends from the inlet port 140 to the longitudinally oriented outlet port 136, thereby redirecting the air flow.

[0116] As illustrated, the outlet ports 136 are located on radially extending sides 246a, 246b of the annular band 246. For example, as illustrated in FIG. 2, in a bidirectional band 246, the outlet ports 246 are located on the axially outward facing side 246a and the axially inward facing side 246b. As illustrated, the outlet ports 136 face along the longitudinal axis 110. It will be understood that the radially extending sides 246a, 246b can extend at an angle to the longitudinal axis, and thus the ports 136 need not face axially.

[0117] The curler outlet 150 is configured to generate an airflow that exits the duct 138 in a desired direction. Thus, the duct is shaped to provide a selected direction of airflow. Thus, the curler outlet 150 may include at least one tangentially angled vane 142 to impart a tangential component to the exit vector. It will be appreciated that the vane may also include another angular component in addition to the tangential component. It will be appreciated that the vane may be a radially extending sidewall of the duct 138.

[0118] As illustrated in Figures 2-9 and 25-28, and particularly Figure 7, the vanes 142 extend at an angle that includes a tangential component and a longitudinal component. Thus, the vanes 142 may be radially spiral vanes, which spiral radially outward from the inlet port 140.

[0119] The curvature of the vane 142 may be constant along the length of the vane 142 from the inlet port 140 to the outlet port 136. Alternatively, the curvature of the vane 142 may vary along the length of the vane. For example, the vane curvature may transition from upstream to downstream toward an increasing longitudinal angle 236, or from upstream to downstream toward an increasing tangential angle 232.

[0120] With reference to Figures 2-9, and particularly to Figure 3, it will be appreciated that vanes 142 may separate the ducts 138 of the annular band of curler air outlets from one another. The multiple ducts 138 of the annular band of curler air outlets 150 are angularly positioned about the longitudinal axis 110. The number of vanes may be selected based on the desired angle and any longitudinal overlap of the vanes. In some examples, the annular band of curler air outlets includes between 4-15 vanes, 5-12 vanes, 6-12 vanes, 6-10 vanes, 7-11 vanes, or 8-10 vanes.

[0121] As illustrated in Figure 55, the vanes 142 may overlap one another so that air entering one duct 138 (e.g., the leftmost duct in Figure 55 terminating in the line with reference numeral 262) from an inlet port 140 may travel through the duct where it is axially spaced from an adjacent duct 138 (the middle duct terminating in the line with reference numeral 250) having inlet ports that are spaced clockwise about the longitudinal axis 110. Alternatively, the ducts may not overlap.

[0122] 2-9, the annular bands 150 of curler air outlets are each adjacent to an annular closed (i.e., air impermeable) longitudinal segment 222. The exemplary annular closed longitudinal segments 222 form an annular land surface 160. The exemplary curler outlets 150 direct airflow across the annular land surface 160 to draw hair around the annular land surface 160. The annular bands 150 of curler air outlets have a longitudinal length 240, and the closed longitudinal segments 222 have a longitudinal length that may be at least 1.5 times, at least 2 times, or at least 3 times the length 240 of the outlets 150.

[0123] 2-9, curler head 102 includes a plurality of annular bands of curler air outlets 150. As in the exemplary embodiment of FIGS. 2-9, annular bands of curler air outlets 150 can be located longitudinally on either side of an annular land surface 160.

[0124] Optionally, as discussed below, curler head 102 can include at least one annular band 150 of curler air outlets that directs air along an exit vector having a longitudinal component 230 toward first end 112 of head 102, and at least one annular band 150 of curler air outlets that directs air along an exit vector having a longitudinal component 230 toward second end 114 of head 102 (bidirectional band). Curler head 102 can include multiple annular bands of curler air outlets, each directing air along an exit vector having a longitudinal component 230 toward a common end of head 102, such as toward first end 112 of curler head 102 as illustrated in FIG.

[0125] As illustrated, an annular band of curler air outlets may form a raised ring of the body or an annular band of curler air outlets may be provided on the body. A radially outer diameter 242 of outlet 136 is greater than a diameter 244 of adjacent land portion 160. With reference to Figures 2-9, and particularly Figures 3 and 4, the exemplary curler head 102 includes a plurality of longitudinally spaced apart raised rings or bands 246.

[0126] In some examples, the curler head 102 can include a concave land portion 160. The concave land portion 160 can be annular. The annular concave land portion 160 can be bounded at one or both ends by a raised ring 246 formed by the annular band of the curler air outlet 150. With reference to Figures 2-9, all of the land portions 160 of the exemplary curler head 102 are concave land portions 160.

[0127] 4, the outlet port 136 has a height 248. The height 248 can be selected based on the desired airflow characteristics. For example, if the outlet port 136 is angularly wide, the height 248 can be reduced.

[0128] Two-way car exit The following is a description of curler outlets that generate an air flow along a vector with a longitudinal component directed towards the first end 112 and another air flow along a vector with a longitudinal component directed towards the second end 114. According to this embodiment, the annular band of curler air outlets can include a first set 150 of curler outlets that direct air towards the first end 112 and a second set 150 of curler outlets that direct air towards the second end 114.

[0129] As illustrated in Figures 25-34, curler outlets 150c are provided as an annular band of curler outlets with outlet ports 136 facing in each direction along longitudinal axis 110. With reference to Figures 29-34, and particularly to Figure 34, the exemplary bidirectional annular band of curler air outlets 150c includes vanes 142 that divide the airflow into first and second components directed respectively above and below longitudinal axis 110.

[0130] In contrast, in Figures 33 and 34, curler outlet 150d is provided as an annular band of curler outlets with outlet ports 136 facing in only one direction along longitudinal axis 110 (i.e., a unidirectional band of curler outlets).

[0131] In some examples, the curler head includes multiple bidirectional outlets. In some examples, the curler head includes multiple bidirectional outlets 150c and multiple unidirectional curler outlets 150d. Optionally, as illustrated, the curler head 102 can have unidirectional bands 150d of curler outlets at the axial ends of the portion of the curler having the outlet ports 136 and one or more bidirectional annular bands 150c of curler air outlets therebetween.

[0132] 29-34, each annular land portion 160 of the curler head can be a section that can be covered (introduces airflow) by one or two adjacent curler outlets 150. In the exemplary embodiment of FIGS. 29-34, and with particular reference to FIG. 33, section 1A is covered by a one-way outlet 150d at the first end 112, section 1B is covered by one side of a two-way outlet 150c, section 2A is covered by the other side of a two-way outlet 150c, section 2B is covered by one side of another two-way outlet 150c, section 3A is covered by the other side of a two-way outlet 150c, section 3B is covered by one side of another two-way outlet 150c, section 4A is covered by the other side of a two-way outlet 150c, and section 4B is covered by a one-way outlet 150d at the second end 114.

[0133] An angularly extending wall 143 may separate the two ducts 138a, 138b, as illustrated in Figure 34. Alternatively, for example if the wall 143 is not provided, the ducts 138a, 138b may be a single duct with the two outlet ports 136 facing in opposite directions.

[0134] In some embodiments, an annular band of curler outlets is located on either side of each section. The annular bands of curler outlets on either side may all be unidirectional, all be bidirectional, or may include both unidirectional and bidirectional outlets. With reference to FIGS. 35-38, an exemplary curler head 102 includes four sections. It will be appreciated that a curler head may have more or fewer sections. In some examples, a curler head with an annular land portion includes three sections. In some examples, a curler head with an annular land portion includes five sections.

[0135] It will be appreciated that in different embodiments, the covering of the sections can be achieved by different arrangements of the curler outlets 150. Figures 35-38 illustrate various embodiments. Referring to Figure 35, an exemplary curler head 102 has sections 1A and 1B covered by a first unidirectional outlet 150 at a first end 112, sections 2A and 2B covered by a second unidirectional outlet 150, sections 3A and 3B covered by a third unidirectional outlet 150, section 4A covered by a fourth unidirectional outlet 150, and section 4B covered by a fifth unidirectional outlet 150 at a second end 114, with all but the fifth outlet directed toward the second end 114. Referring to FIG. 36, an exemplary curler head 102 has sections 1A and 1B covered by a first unidirectional outlet 150, sections 2A and 2B covered by a second unidirectional outlet 150, sections 3A and 3B covered by a third unidirectional outlet 150, and sections 4A and 4B covered by a fourth unidirectional outlet 150 at the second end 114, each of the outlets 150 directed toward the first end 112. Referring to FIG. 37, an exemplary curler head 102 has section 1A covered by a first unidirectional outlet 150 at a first end 112, section 1B covered by a second unidirectional outlet 150, sections 2A and 2B covered by a third unidirectional outlet 150, sections 3A and 3B covered by a fourth unidirectional outlet 150, and sections 4A and 4B covered by a fifth unidirectional outlet 150 at a second end 114, with all but the first outlet facing toward the first end 112. Referring to FIG. 38, an exemplary curler head 102 has section 1A covered by a first unidirectional outlet 150 at a first end 112, sections 1B and 2A covered by a first bidirectional outlet 150, sections 2B and 3A covered by a second bidirectional outlet 150, sections 3B and 4A covered by a third bidirectional outlet 150, and section 4B covered by a second unidirectional outlet 150 at a second end 114.

[0136] It will also be appreciated that two unidirectional bands 150d of curler outlets can be positioned adjacent to one another with the outlet ports 136 facing in different axial directions, thereby essentially providing a bidirectional annular band of curler outlets 150.

[0137] The curler outlet closest to the head inlet end is directed away from the head inlet end. The following is a description of a curler head having a curler outlet 150 at the inlet end 112 that is shaped to direct air away from the inlet end 112. Directing the air away from the inlet end of the curler head 102 prevents hair from being carried past the end 112, such as onto an integrated handle or onto the body of the blower to which the curler head 102 is attached. Any configuration of curler outlet 150 can be used.

[0138] According to this embodiment, curler outlet 150 closest to inlet end 112 is shaped to direct air along an outlet vector 152 that includes a longitudinal component 230 directed away from inlet end 112. Outlet vector 152 may not include a component in the direction of the inlet end, or may have a small component directed towards the inlet end.

[0139] As discussed elsewhere herein, the curler head can include longitudinally continuous segments 280 having a constant longitudinal extent. The segments 280 can be curler segments 280a that include one or more curler outlets 150, or non-curler segments 280b that do not include any curler outlets 150. The non-curler segments 280b can be closed segments (e.g., closed segments 222). In some examples, the non-curler segments 280b include one or more inlets (e.g., venturi inlets). In some examples, the non-curler segments 280b include outlets that are not curler outlets (e.g., bleed air outlets). In some examples, each curler outlet 150 of the longitudinal curler segments 280a closest to the inlet end 112 is shaped to direct air along an outlet vector 152 whose only longitudinal component 230 is directed away from the inlet end 112. In some examples, the curler segment 280a closest to the entrance end 112 is the segment 280 of the entrance end 112 (ie, not separated from the entrance end 112 by one or more non-curler segments 280b).

[0140] 104-110, the example curler head 102 includes multiple longitudinal segments 280, including a curler segment 280a at the inlet end 112. The inlet end curler segment 280a directs exit air away from the inlet end 112. The example inlet end segment 280a of FIGS. 104-110 includes a set 151 of outlets 150, each of which is shaped to direct air along an outlet vector 152 that includes a longitudinal component 230 directed away from the inlet end 112.

[0141] It will be appreciated that in some examples, all of the curler outlets 150 of the curler head 102 direct air away from the inlet end 112 (i.e., toward the opposite end 114 relative to the longitudinal axis). However, in some examples, the curler head 102 also includes one or more curler outlets 150 that direct air toward the inlet end 112 relative to the longitudinal axis. In some examples, the curler head 102 includes curler segments 280a that direct the airflow in the opposite longitudinal direction. In such examples, the curler head 102 includes at least one segment 280a that directs air toward the inlet end 112 (i.e., the vector 152 includes a longitudinal component 230 that is directed toward the inlet end) and another curler segment 280a that directs air toward the opposite end 114 (i.e., the vector 152 includes a longitudinal component 230 that is directed toward the opposite end). 104-110 includes an opposite end or tip curler segment 280a at an opposite end 114 of head 102, with each curler outlet 150 of opposite end curler segment 280a shaped to direct air along an outlet vector 152 that has only one longitudinal component 230 directed toward inlet end 112. Thus, the inlet end curler segment 280a and the opposite end curler segment 280a of the example head 102 of FIGS. 104-110 direct air in generally opposite directions relative to longitudinal axis 110.

[0142] In some examples, two or more curler segments 280a direct air toward the inlet end 112 relative to the longitudinal axis. In some examples, all but one of the curler segments 280a direct air toward the inlet end 112 relative to the longitudinal axis. The example head 102 of FIGS. 104-110 includes multiple curler segments 280a that direct air toward the inlet end 112 relative to the longitudinal axis 110 and a single curler segment 280a at the inlet end 112 that directs air toward the opposite end 114 relative to the longitudinal axis 110.

[0143] The curler segments 280a that direct air in opposite directions relative to the longitudinal axis can be separated by a non-curler segment 280b. The non-curler segment 280b can be a closed segment that provides a land portion between the two curler segments 280a that direct air in opposite directions. With reference to FIGS. 104-110, the exemplary head 102 includes an inlet end segment 281 that is a curler segment 280a at the inlet end 112 that directs air toward the opposite end 114. The exemplary head 102 of FIGS. 104-110 includes an intervening non-curler segment 285 between the inlet end segment 281 and a further curler segment 283 that directs air toward the inlet end 112 relative to the longitudinal axis 110. The exemplary intervening non-curler segment 285 of FIGS. 104-110 is a closed segment that provides a land portion 160 between the segment 283 and the segment 281.

[0144] The intervening non-curler segments 285 of any of the curler heads disclosed herein may be of any suitable shape. The intervening non-curler segments 285 may have a varying (e.g., gradually varying and / or step-changing) radial extent, with a maximum radial extent at an intermediate portion of the segment 285 (e.g., a portion spaced from each longitudinal end of the segment by at least 10%, 20%, or 25% of the longitudinal length of the segment). The maximum radial extent of the intervening non-curler segments 285 may be generally at the longitudinal mid-portion of the segment. With reference to FIGS. 104-110, an exemplary intervening non-curler segment 285 is generally bell-shaped along the longitudinal axis 110. A segment that is bell-shaped along the longitudinal axis 110, 160 has a smoothly increasing and then decreasing diameter along the longitudinal axis 110. The exemplary segment 285 of Figures 104-110 is generally bell-shaped, with a maximum radial extent at the longitudinal midpoint of the segment.

[0145] In the exemplary embodiment of Figures 104-110, curler segments 280a adjacent to both longitudinal ends of an intervening non-curler segment 285 are shaped to direct air in opposite directions (i.e., clockwise or counterclockwise) along an exit vector 152 having a tangential component 154. This aids in capturing hair on the curler head 102. In some embodiments, curler segments 280a adjacent to both longitudinal ends of an intervening non-curler segment 285 are shaped to direct air in the same direction (i.e., clockwise or counterclockwise) along an exit vector 152 having a tangential component 154. This can reduce turbulence at the interface of the air stream.

[0146] Curler outlet with variable cross airflow area The following is a description of curler outlet 150 having a cross airflow area that varies along the length of the curler outlet. This variation can be due to inner and outer walls that move away and / or toward, and / or angular side walls that move away and / or toward (e.g., formed by vanes 142). Any configuration of curler outlet 150 can be used.

[0147] The curler outlet 150 may include an expansion zone and / or a contraction zone. An expansion zone is a portion of the duct 138 downstream of the inlet port 140 and upstream of the outlet port 136 where the airflow area of ​​the duct expands. A contraction zone is a portion of the duct upstream of the outlet port 136 and downstream of the inlet port 140 where the airflow area of ​​the duct decreases. The inclusion of a contraction zone increases the airflow velocity of the air jet generated by the outlet. The expansion zone reduces back pressure which, in combination with a contraction zone, can accelerate the airflow through the duct.

[0148] 40, 43-46 and 54-55, exemplary expansion zones 250 each have a minimum cross-sectional airflow area that is greater than the airflow area of ​​the inlet port 140 and / or the outlet port 136. In some examples, the expansion zone 250 is a portion of the duct 138 that extends over at least 3 mm, at least 5 mm, or at least 10 mm. The expansion zone 250 can be located anywhere along the length of the duct 138.

[0149] 39-55, the exemplary contraction zones 252 each have a maximum transverse airflow area that is less than a minimum transverse airflow area of ​​at least a portion of the duct 138. In some examples, the contraction zones 252 have a maximum transverse airflow area that is less than the airflow area of ​​the inlet port 140 and / or the outlet port 136. In some examples, the contraction zone 252 is a portion of the outlet duct 138 that extends over at least 3 mm, at least 5 mm, or at least 10 mm. The contraction zone 252 can be located anywhere along the length of the duct 138. In some examples, the contraction zone extends to the outlet port 136.

[0150] 39-55, the exemplary duct 138 is formed by an outer wall 260 (e.g., of a raised ring or annular band 246) and an inner wall 262 that radially underlies the outer wall 260. With reference to FIGS. 39-55, the exemplary duct 138 has an angular width defined by the vanes 142. The transverse airflow area of ​​the duct 138 is defined by a combination of the spacing between the sidewalls (e.g., vanes 142 in the example of FIGS. 39-55) and the spacing between the radially outer and radially inner walls.

[0151] By increasing the spacing between the outer and inner walls and / or increasing the spacing (e.g., angular spacing) between the side walls, the cross air flow area of ​​the duct 138 is increased, which can be used, for example, to form an expansion zone 250. With reference to FIGS. 39-44 and 37-55, the exemplary duct 138 is formed radially outward of the air passage 170. The inner wall 262 of the exemplary duct of FIGS. 39-44 and 37-55 has an inner diameter that is generally the same as the inner diameter of the adjacent land portion 160. By forming the duct outside the air passage 170, the duct wall can be prevented from impeding the flow of air through the air passage 170. With reference to FIGS. 45 and 46, the exemplary duct 138 is formed at least partially within the air passage 170. The inlet port 140 of the curler outlet duct is located within the passage 170. The exemplary radially inner surface of the inlet port 140 is located radially inward of the radial exit wall 160 of the passage 170. The inner wall 262 of the exemplary duct of Figures 45 and 46 has an inner diameter that is smaller than the inner diameter of the adjacent land portion 160. The inlet port extending the duct into the air passage 170 allows the overall diameter of the curler head to be reduced.

[0152] By reducing the spacing between the outer and inner walls and / or reducing the angular spacing between the vanes, the cross airflow area of ​​the duct 138 is reduced, which can be used, for example, to form a contraction zone 252. With reference to Figures 40, 43, 44 and 47-49, an exemplary contraction zone 252 is formed by reducing the diameter of the outer wall 260 toward the downstream end of the duct 138. With reference to Figures 44 and 45, an exemplary contraction zone 252 is formed by expanding the diameter of the inner wall 262 toward the downstream end of the duct. With reference to Figures 54 and 55, an exemplary contraction zone is formed by reducing the angular spacing between the vanes 142 toward the downstream end of the duct 138.

[0153] When both the contraction zone 252 and the expansion zone 250 are provided in a single duct 138 , the contraction zone 252 may be downstream, optionally immediately downstream, of the expansion zone 250 .

[0154] In some examples, the expansion zone 250 may be an outlet end expansion zone 250 at the outlet end of the duct 138. The outlet end expansion zone 250 extends to and includes the outlet port 136. With reference to Figures 111-117, and particularly to Figure 114, an exemplary outlet 134a has an outlet end expansion zone 250 that extends to and includes the outlet port 136. The cross airflow area of ​​the outlet end expansion zone 250 may increase along the expansion zone toward the outlet port 136.

[0155] The outlet end flared section can extend from the inlet port 140 to the outlet port 136 or from an intermediate location between the inlet port 140 and the outlet port 136. While the exemplary outlet end flared zone 250 in FIGS. 111-117 extends from an intermediate location 144 between the inlet port 140 and the outlet port 136 to the outlet port 136, it will be understood that in other examples, the outlet end flared zone 250 may extend from the inlet port 140 to the outlet port 136. The transverse airflow area of ​​the duct 138 transverse to the direction of airflow through the duct at the inlet port 140 may be smaller than the transverse airflow area of ​​the duct 138 at the outlet port 136. With reference to FIGS. 111-117, the transverse airflow area of ​​the inlet port 140 of the exemplary outlet 134a is smaller than the transverse airflow area of ​​the outlet port 136. In some examples, the transverse airflow area of ​​the duct 138 is greatest at the outlet port 136. In some examples, the cross-sectional air flow area of ​​the duct 138 is smallest at the inlet port 140 .

[0156] 111-117, the transverse airflow area of ​​the exemplary outlet end flared zone 250 increases gradually along the length of the outlet end flared zone 250. It will be appreciated that the transverse airflow area of ​​the outlet end flared zone 250 can increase gradually and / or in steps. It will be appreciated that the increase in the transverse airflow area may be a combination of gradual and stepwise increases, such as an initial gradual increase, followed by a stepwise increase, followed by a further gradual increase. With reference to FIGS. 111-117, the transverse airflow area of ​​the exemplary outlet end flared zone 250 increases continuously along the length of the outlet end flared zone 250. It will be appreciated that the transverse airflow area of ​​the outlet end flared zone 250 can increase continuously or can include one or more portions where the transverse airflow area remains unchanged (e.g., between the steps of the stepwise increase in the transverse airflow area). 111-117, the transverse airflow area increases towards the outlet port 136 due to the increasing separation distance between the inner wall 262 and the outer wall 260. It will be appreciated that the increase in transverse airflow area may be due to any suitable increasing separation distance between the walls forming the duct 138.

[0157] Airflow textured land area Below is a description of a land portion that is textured to improve airflow (e.g., Coanda airflow): The land portion includes a surface texture selected to improve air adhesion to the surface.

[0158] In some examples, the textured land portion includes radially elevated portions and radially depressed portions, and the transition between the radially elevated portions and the radially depressed portions may be generally smooth or may include a small step (e.g., less than 15%, less than 10%, or less than 5% of the diameter of the curler head).

[0159] The land portion 160 may include vanes or ridges 270 that rise from the land portion 160. With reference to FIG. 57, an exemplary land portion includes a plurality of ridges 270 that are generally parallel to one another. The ridges 270 may extend generally transverse to the direction of airflow across the land portion 160 (i.e., generally transverse to the exit vector 152). The ridges may extend straight, as illustrated, or may be curved.

[0160] It will be appreciated that other surface textures may be used in addition to or in lieu of the vanes or ridges. For example, the land portion 160 may include discontinuous spaced apart raised surfaces, such as indentations 272 (see, e.g., FIG. 56). It will be appreciated that the indentations 272 may be arranged in linear or curvilinear rows, where the rows may extend generally transverse to the direction of airflow across the land portion 160.

[0161] Grip textured hair receiving surface The following is a description of hair receiving surfaces that are textured to inhibit movement of hair across the surface. In some examples, the textured hair receiving surface is a directional grip surface. The directional grip surface is shaped to inhibit movement of hair across the surface in a selected direction or directions. In some examples, the texture is selected to inhibit hair from moving across the surface in an angular direction (i.e., the unwinding direction). In some examples, the texture is selected so as not to inhibit hair from sliding axially across the surface.

[0162] The grip textured surface allows for the use of airflow that provides less gripping force to hold hair in place during curling. The directional gripping surface reduces the gripping force required from the airflow while allowing the user to remove hair by moving their hair in the release direction. In some examples, some or all of the land surface is a grip textured hair receiving surface (see, e.g., FIG. 58).

[0163] In some examples, the land portion has a unidirectional mechanical hair engagement member 274 that engages the hair as it rotates around the land portion in a first direction 276 and allows the hair to rotate around the land portion in a second direction 278 opposite the first direction 276. The gripping textured surface of the exemplary curler head of FIG. 58 includes a plurality of scales or shingles with raised sides. As illustrated, the scales are layered such that the clockwise side is under another scale and the counterclockwise side is over another scale.

[0164] It will be appreciated that the grip textured surface can have any suitable texture.

[0165] Thermally conductive hair receiving surface The following is a description of a hair receiving surface formed of a thermally conductive material to enhance heat transfer to the hair. Thermally conductive materials have a high heat transfer rate. According to this embodiment, the hair receiving surface can be part or all of any portion of the exterior surface of the curler head 102, such as the land portion 160 and / or the annular band 246.

[0166] In some examples, the hair receiving surface is formed of a thermally conductive material that forms a land portion (i.e., a Coanda surface) onto which the curler outlet directs the airflow. In some examples, the hair receiving surface is formed of a thermally conductive material that forms a surface that overlies the curler outlet.

[0167] The thermally conductive walls that form the hair receiving surface improve heat transfer to the hair, allowing for a cooler curling action and / or a faster curling action. A larger amount of heat required to set the curl can be conductively transferred from the body side walls of the curler head to the hair.

[0168] The body sidewalls can be formed of or covered with a thermally conductive material. In some examples, the hair receiving surface is formed of metal (e.g., aluminum or copper), ceramic, carbon, metal-filled plastic, ceramic-filled plastic, or carbon-filled plastic. If the walls are covered, the thermally conductive material can be provided by spraying, electrodeposition, or the like.

[0169] 2-9, the radially outer surface of the exemplary annular land portion 160 is a metallic surface (eg, an aluminum or copper sleeve) and the radially outer surface of the raised ring 246 is a metallic surface.

[0170] It will be appreciated that the presence or amount of thermally conductive material may be uniform or may vary along the length of curler head 102. For example, more thermally conductive material or material with a higher thermal conductivity may be provided toward opposing end 114 than inlet end 112.

[0171] Land surface with variable radial extent The following is a description of land portions having cross-sectional shapes and / or sizes that vary along the longitudinal axis (in a plane transverse to the longitudinal axis 110). Such land portions can be used with airflow that diverges at an angle about the curler axis 110, and can be used as provided for use with the Coanda effect.

[0172] According to this embodiment, the land portions form a radially outer surface of curler head 102 that varies in radial extent along some or all of the axial length of curler head 102. Thus, the annular radially outer surface has a diameter that varies along some or all of the longitudinal axis.

[0173] In instances where a land portion is provided for use with the Coanda effect, the land portion forms a generally continuous land surface as the shape and / or size changes to encourage the air flow to remain attached to the land portion or to include small steps (e.g., less than 15%, less than 10%, or less than 5% of the diameter of the curler head).

[0174] A land portion of varying shape can improve airflow dynamics within or over the surface of the curler head. With reference to Fig. 59, an exemplary land portion 160 has a diameter that increases smoothly along the longitudinal axis and then remains constant. With reference to Fig. 60, an exemplary land portion 160 has a diameter that increases smoothly along the longitudinal axis 110 and then decreases.

[0175] Curler head 102 can incorporate various types of land portions. As illustrated in Figures 78-84, curler head 102 can include land portion 160a of varying radial extent and land portion 160b of constant radial extent, both portions 160a and 160b adjacent at least one curler outlet 150.

[0176] It will be appreciated that the land segments may include a series of axially positioned land segments having a common contour, as illustrated. As illustrated in FIG. 59, each land segment 160 has a wide end and a narrow end. The narrow end is located at the wide end of the next adjacent land segment. Alternatively, the land segments may be separated by land segments having a constant diameter.

[0177] It will be appreciated that the diameter of the land portion may vary along the portion of the curler head having the air outlet, and the diameter may vary at a constant rate or in a repeating pattern, as illustrated in Figures 59 and 60.

[0178] It will be appreciated that the junction of the narrow end of a land portion and the wider end of an adjacent land portion may form curler outlet 150 and may provide annular band 246. See, e.g., Figures 59, 87 and 88.

[0179] Longitudinally decreasing outlet airflow area The following is a description of a curler head in which the minimum cross-sectional airflow area of ​​some or all of the curler outlets along some or all of the longitudinal length of the curler head decreases from one end of the curler head to the other. According to this aspect, any configuration of curler outlets 150 can be used.

[0180] According to this aspect, the minimum cross-sectional airflow area of ​​the curler outlets can vary continuously along some or all of the length of the curler head. The minimum cross-sectional airflow area of ​​the curler outlets may vary axially at a constant rate or by increasing or decreasing amounts. It will be appreciated that the minimum cross-sectional airflow areas of some of the curler outlets arranged in succession in the axial direction may be the same and need not all vary for the next axially successive curler outlet.

[0181] It will be appreciated that the minimum cross-sectional air flow area of ​​the curler outlet may decrease from the inlet end to the opposite end or from the opposite end to the inlet end.

[0182] It will be appreciated that if a single curler outlet is provided at a particular axial location along the curler head, the minimum cross airflow area may be the area of ​​the single curler outlet at that location. However, as discussed earlier herein, if the curler outlets are provided in strip 246, the minimum cross airflow area may be the combined cross airflow area of ​​all of the curler outlets in strip 246. Thus, a reduction in airflow area may be the result of using curler outlets with a smaller minimum cross airflow area and / or the result of providing fewer curler outlets in the same axial segment along the curler head. Adjusting the size and / or number of outlets in the strip can result in a more uniform airflow from the outlets along the axial length of the curler head.

[0183] 61-64, the exemplary curler head includes longitudinally consecutive segments 280 having a constant longitudinal extent. The exemplary curler head 102 of FIGS. 61-64 includes a curler outlet 150 in each segment 280. The curler outlets 150 of the segments 280 together define a minimum transverse exit airflow area for the segment 280. In the exemplary embodiment of FIGS. 61-64, the minimum transverse exit airflow area for each segment 280 is smaller than the longitudinally consecutive segments 280 toward the first end 112. The reduction in transverse exit airflow area in the exemplary curler head 102 of FIGS. 61-64 is due to a reduction in the size of the curler outlets 150 (i.e., a reduction in the longitudinal extent 282). However, it will be appreciated that in other examples, the reduction may also or alternatively be due to a reduction in the number of curler outlets in the axial position of the segment 280. The exemplary curler head 102 of Figures 61-64 has a gradually decreasing minimum cross-exit airflow area for each segment along its length, although it will be understood that in some instances the reduction may be irregular.

[0184] The curler head 102 includes at least three segments 280 arranged along a longitudinal axis, with a first segment having a minimum cross-sectional airflow area of ​​a curler outlet of the first segment that is greater than a minimum cross-sectional airflow area of ​​a curler outlet of a second segment, and the second segment having a minimum cross-sectional airflow area of ​​a curler outlet of the second segment that is greater than a minimum cross-sectional airflow area of ​​a curler outlet of a third segment. The first, second, and third segments may be separated by intervening segments, but in some examples the first, second, and third segments are directly adjacent to one another.

[0185] Head air passage narrows longitudinally The following is a description of a curler head having an air flow passage along some or all of its axial length and an axially decreasing cross-sectional airflow area. According to this embodiment, any configuration of curler outlet 150 can be used.

[0186] According to this aspect, the transverse airflow area of ​​the curler head can vary continuously along any portion of the length of the curler head. The transverse airflow area of ​​the curler head can vary axially at a constant rate or can vary by increasing or decreasing amounts.

[0187] It will be appreciated that the cross-sectional airflow area of ​​the curler head may decrease from the inlet end to the opposite end, or from the opposite end to the inlet end.

[0188] The reduction in size may be reflected in a narrowing diameter of the curler head, which may narrow from one end to the other. The cross-sectional air flow area of ​​the air flow passage may decrease continuously or in steps. For example, the body sidewall may narrow continuously or in steps. In some examples, the curler head narrows from the first or inlet end to the second end.

[0189] 65-68, an exemplary curler head 102 has an airflow passage 130 with a cross-path airflow area that decreases from the upstream end to the downstream end. The exemplary airflow passage 130 of FIGS. 65-68 has a stepwise narrowing cross-path airflow area. The stepwise narrowing airflow passage can have any suitable number of steps, such as five steps as illustrated.

[0190] It will be appreciated that the air flow path through the curler head need not necessarily be defined by the sidewalls of the curler head, but may be provided by one or more conduits located in the curler head and the air flow path through the curler.

[0191] It will be appreciated that this aspect may be used in conjunction with, or instead of, a longitudinal reduction in the outlet airflow area.

[0192] Variable exit vector magnitude The following is a description of a curler head in which the magnitude of the exit vector 152 varies from one longitudinal segment 280 to another longitudinal segment 280. The magnitude of the exit vector 152 for the curler segment 280a closest to one longitudinal end of the curler head may be smaller than the curler segment 280a at the midpoint and / or the opposite longitudinal end. The exit vector may be smallest for the curler segment 280a closest to one or both of the longitudinal ends of the curler head. The variation in magnitude of the exit vector 152 may be due, for example, to varying the minimum transverse exit airflow area of ​​the exit longitudinally.

[0193] The exit vector 152 of the curler segment 280a closest to the inlet end 112 can be smaller than, for example, the segment closest to the opposite end 114 and / or the segment midway between the inlet end 112 and the outlet end 114. A relatively smaller exit vector 152 at the inlet end 112 can reduce the effect of the airflow on hair that passes over the inlet end 112 of the curler head 102 and falls off the curler head 102. For example, a relatively smaller exit vector 152 at the inlet end 112 can reduce hair wrapping around an integrated handle or blower to which the curler head 102 is attached.

[0194] The exit vector 152 of a longitudinal segment 280 is the sum of the vectors of the curler exits 150 of that segment 280. For example, the longitudinal segment 280 of the curler head 102 may include one or more annular ring exits 150, or annular sets 151 forming a band of exits 150. With reference to FIGS. 111-117, and particularly FIG. 111, the exemplary curler head 102 includes five longitudinal segments 280, including one non-curler segment 280b and four curler segments 280a. The exit vector 152 of the curler segment 280a closest to the inlet end 112 of the curler head 102 may be smaller than at least one of the exit vectors 152 of the remaining curler segments 280a. The exit vector 152 of the curler segment 280a closest to the inlet end 112 of the example head 102 of FIGS. 111-117 is smaller than the exit vector 152 of each of the remaining curler segments 280a. The exit vector 152 of the curler segment 280a closest to the inlet end 112 of the example head 102 of FIGS. 111-117 includes a longitudinal component directed toward the inlet end 112, and the reduced magnitude of the exit vector 152 may reduce the effect of airflow on hair beyond the inlet end 112. Although the example inlet end curler segment 280a of FIGS. 111-117 is spaced from the inlet end 112 by a non-curler segment 280b that does not include a curler exit 150, it will be understood that the inlet end curler segment 280a may alternatively be the segment 280 closest to the inlet end 112 (i.e., not spaced by a non-curler segment 280).

[0195] The magnitude of the exit vector 152 may be varied in any suitable manner. In some examples, the magnitude of the exit vector 152 is varied by varying the minimum cross airflow area of ​​the segment 280 (e.g., throttling the duct 138 of the inlet end curler segment 280). With reference to Figures 111-117, and particularly Figure 114, the minimum cross airflow area of ​​the duct 138 of the inlet end curler segment 280a is less than the minimum cross airflow area of ​​each of the ducts 138 of each of the other curler segments 280 (e.g., due to the number of inlet ports 140 varying between segments 280). It will be appreciated that the magnitude of the exit vector 152 of a segment may also or alternatively be varied by, for example, positioning the segment further from the inlet to the curler airflow path and / or varying the cross airflow area of ​​the curler head airflow path upstream of the duct 138.

[0196] Reconfigurable airflow direction via valve Below is a description of a curler head that is reconfigurable between clockwise and counterclockwise configurations by reconfiguring some or all of the flow paths therethrough, such that a single curler head can be used to create curls on the right and left side of a user's head.

[0197] According to this aspect, curler head 102 may be reconfigurable between a clockwise configuration and a counterclockwise configuration. In the clockwise configuration, some or all of the open curler outlets 150 direct air in a generally clockwise direction. In the counterclockwise configuration, some or all of the open curler outlets 150 direct air in a generally counterclockwise direction. A user may wish to switch between clockwise and counterclockwise airflow when switching between curling hair on different sides (right and left) of the user's head.

[0198] It will be appreciated that the curler head can be reconfigured in any suitable manner. In some examples, the curler head 102 includes a clockwise oriented curler outlet 150 and a counterclockwise oriented curler outlet 150 and can be selectively switched between using the clockwise oriented curler outlet 150 and the counterclockwise oriented curler outlet 150. For example, a valve can be used to switch the outlet. It will be appreciated that in other examples, the curler head can be reconfigured in other ways, such as by redirecting the curler outlet, for example, by changing the angle of vanes in the duct or shifting the location of the outlet or inlet ports along the length of the duct.

[0199] Thus, the curler head can have curler outlets that generate a clockwise flow and curler outlets that provide a counterclockwise flow. The curler head can be reconfigured to selectively open some or all of the curler outlets that generate a clockwise flow and / or some or a portion of the flow paths leading to those curler outlets. Similarly, the curler head can be reconfigured to selectively open some or all of the curler outlets that generate a counterclockwise flow and / or some or a portion of the flow paths leading to those curler outlets.

[0200] For example, one or more valves can be provided to reconfigure the curler head. This aspect can allow the curler head to be reconfigured quickly and with minimal moving parts.

[0201] 14-18 and 20-24, exemplary curler heads 102 each include an air outlet directional valve 208 that is movable between a first position in which curler head 102 is in a clockwise configuration and a second position in which curler head 102 is in a counterclockwise configuration. Air outlet directional valve 208 can control whether clockwise oriented curler outlet 150a or counterclockwise oriented curler outlet 150b is open.

[0202] Any suitable air outlet directional valve 208 can be used to selectively direct air to a curler outlet that directs air clockwise or a curler outlet that directs air counterclockwise. With reference to Figures 14-18, an exemplary air outlet directional valve 208 includes a rotating tube (that rotates angularly) having an opening selectively alignable with a curler outlet 150b that is oriented counterclockwise and a curler outlet 150a that is oriented clockwise. With reference to Figures 20-24, an exemplary air outlet directional valve 208 includes a sliding tube (that slides longitudinally) having an opening selectively alignable with a curler outlet 150b that is oriented counterclockwise and a curler outlet 150a that is oriented clockwise.

[0203] It will be appreciated that the curler head can have a first flow path extending to a clockwise oriented curler outlet 150a and a second flow path extending to a counterclockwise oriented curler outlet 150b. The two flow paths can extend from a header, which can be at the inlet end of the curler head, for example, and a single valve (e.g., a gate valve) can be movable to selectively open the first and second air flow paths.

[0204] Secondary application outlet Below is a description of a curler head that can also be used as a concentrator and / or diffuser.

[0205] It will be appreciated that the concentrator and / or diffuser can be provided in any suitable manner. For example, according to this aspect, the curler head can have an attachment removably connectable thereto that functions as the concentrator and / or diffuser. Alternatively, the curler head can have an outlet built therein that functions as the concentrator and / or diffuser.

[0206] According to this embodiment, the curler head can include, in addition to curler outlet 150, one or more secondary air outlets that direct the air flow as a concentrator and / or diffuser.

[0207] Optionally, the curler head is selectively reconfigurable between all three of the concentrator configuration, the diffuser configuration and the curler configuration.

[0208] The outlet of the diffuser and / or concentrator can be located anywhere in the curler head, and is optionally located at second end 114 of curler head 102 .

[0209] In some examples, the curler head includes more than one air flow path, including a first air flow path for the curler outlet 150 and a second air flow path for a secondary air outlet 294. With reference to FIGS. 14-18, the air flow path 130 of the example curler head 102 includes a primary branch 290 leading to the curler outlet 150 and a secondary air flow branch 292 leading to a secondary air outlet 294. The primary branch 290 may be referred to as an axially extending passage 290 for curling air, and the secondary air flow branch 292 may be referred to as an axially extending passage 292 for diffuser air for examples in which the secondary air outlet can be used to provide a concentrator air flow or a diffuser air flow. The example curler head of FIGS. 14-18 includes a single secondary air flow branch 292 that extends between (i.e., within) the multiple primary air flow branches 290. With reference to FIGS. 14-18, the example secondary air flow branch 292 is formed by a longitudinally extending tube.

[0210] It will be appreciated that the secondary air flow branch 292 may be disposed within the primary air flow branch 290 or may extend axially alongside the primary air flow branch 290 .

[0211] The secondary air outlets 294 are arranged in any suitable arrangement to form a desired styling tool. In some examples, the secondary air outlets 294 are arranged such that the curler head 102 is used as a diffuser when the secondary air outlets 294 are open. With reference to FIG. 14, the exemplary secondary air outlets 294 are arranged such that the curler head 102 is used as a diffuser when the secondary air outlets 294 are open because the secondary air outlets 294 are generally evenly distributed over a curved (domed as illustrated, but could be cylindrical, for example) surface.

[0212] In some examples, the curler head is selectively reconfigurable between a curler configuration and a secondary configuration. In the curler configuration, some or all of the curler outlets 150 are open and some or all of the one or more secondary air outlets 294 are closed. In the secondary configuration, at least some of the one or more secondary air outlets 294 are open and some or all of the curler outlets 150 are closed.

[0213] As discussed above with respect to the clockwise and counterclockwise configurations, the curler head may be reconfigurable to selectively open some or all of curler outlets 150 and / or some or a portion of the flow paths leading to curler outlets 150. Similarly, the curler head may be reconfigurable to selectively open some or all of secondary air outlets 294 and / or some or a portion of the flow paths leading to secondary air outlets 294.

[0214] In some examples, curler head 102 includes a valve movable between a first position and a second position, where in the first position primary air flow branch 290 is open such that the curler outlet leads to head inlet 132 and secondary air flow branch 292 is closed. In the second position primary air flow branch 290 is closed and secondary air flow branch 292 is open such that the secondary air outlet leads to head air inlet 132. Similar to the mechanisms described with respect to the clockwise and counterclockwise configurations, it will be appreciated that the valve may also or alternatively selectively block or unblock the air outlet directly (e.g., rather than blocking the entire branch), such as when the curler and secondary air outlet open from a common air flow path.

[0215] Bleed valve The following is a description of a curler head that includes a bleed valve that is selectively openable to open the bleed air inlet and / or the bleed air outlet.

[0216] In use, the bleed air inlet can introduce ambient air into the flow path through some or all of the curler, thereby increasing the amount of air in the air flow path 130. The larger amount of air can be used, for example, to increase the curling force to position the hair. Alternatively or in addition, if the bleed air inlet is upstream of the curler outlet but downstream of the heating element, the bleed air can reduce the temperature of the air provided to the curler outlet 150. The cooler air can be used, for example, to set the curl after the hair has been heated and positioned into a suitable shape. Thus, the bleed valve can be operable to introduce ambient air into the air flow passage at the end of the curling action, for example after the hair has been heated for a sufficient time to form a curl, such that the temperature of the air exiting the air outlet when the bleed valve is opened is reduced. For example, a user can operate an actuator to open the bleed inlet, or the curler head can automatically open the bleed inlet after a sensor detects that the hair has reached a target temperature or that a curling action has occurred for a preset time.

[0217] Any valve can be used as the bleed air inlet. In some examples, the bleed air inlet includes a venturi that draws air into the curler head 102 when the inlet is open.

[0218] In use, the bleed air outlet reduces the amount of air exiting the curler outlet 150 by bleeding off a portion of the air. The reduced amount of air exiting the curler outlet reduces the curling force acting on the hair. Reducing the curling force can, for example, allow a user to more easily release their hair from the curler head 102 after a curling action. In some examples, the bleed air outlet can be operable at the end of a curling action, such that air is exhausted from the air flow passages upstream of some or all of the curler outlets 150, thereby reducing the curling force generated by the curler outlet. It will be appreciated that the secondary air outlet 294 can be used as a bleed air outlet if the curler head is operable as a concentrator or diffuser.

[0219] It will thus be appreciated that the outlet of the bleed air inlet and / or the inlet of the outlet bleed valve may be selectively openable while the curler outlet remains open and, when open, is in flow communication with the common portion of the air flow path into which the curler outlet opens.

[0220] The bleed valve can be located in any suitable location. In some examples, the bleed valve is located at the first end 112 of the curler head 102.

[0221] The bleed valve may be selectively openable by any suitable actuator. The bleed valve may be openable by a pressure differential across the valve (i.e., opening in response to a reduction in pressure in the curler head 102). In some examples, the bleed valve may be selectively openable in response to a user command, such as a command to turn down the heat of the air by letting in air that bypasses some or all of the heating elements, or a command to turn out air to reduce the curling force by reducing the flow through the curler outlet 150. Any suitable valve may be used, such as a valve that selectively closes the inlet or outlet duct or port directly, or a valve that selectively closes a portion of the air flow path. The bleed valve may control one inlet and / or outlet, or it may control two or more inlets and / or two or more outlets.

[0222] 14-18, the exemplary curler head 102 includes a bleed air inlet 300 downstream of the head inlet 132 and upstream of the curler outlet 150 that is selectively closed by a bleed valve 301. In use, the head inlet 132 leads to a blower 182 that moves heated air, and the exemplary bleed air inlet 300 provides an air inlet that bypasses the heating element of the blower.

[0223] The exemplary bleed air outlet 302 of Figures 14-18 opens from a common airflow branch with the curler outlet, and is also selectively closed by bleed valve 301. In some examples, the bleed air outlet is one or more of the secondary outlets, where secondary air outlet 294 is openable while the curler outlet is open and is from a common airflow branch with curler outlet 150 (i.e., in addition to being openable while the curler outlet is closed to function as a secondary air outlet). With reference to Figures 14-18, in an exemplary embodiment, secondary outlet 294 and curler outlet 150 do not open from a common airflow branch, and curler head 102 includes a bleed air outlet 302 that is separate from secondary outlet 294. If the curler head does not include a secondary outlet 294, or if the secondary outlet 294 opens from the same airflow branch as the curler outlet 150 but is not openable while the curler outlet 150 is open, the curler head can also or alternatively include a separate bleed air outlet 302.

[0224] Curler head 102 can have both a bleed air outlet and a bleed air inlet. Curler head 102 can have both a bleed air inlet and a bleed air outlet that are operable (e.g., sequentially operable) by a single toggle (e.g., button). For example, the button or switch can be pressed partway through a full stroke for the bleed air inlet and all the way through for the bleed air outlet, or pressed once for the bleed air inlet and again for the bleed air outlet.

[0225] A venturi having an air inlet drawing in from an inlet end The following is a description of a curler head having a venturi with an air inlet leading to the interior. The air inlet extends from the exterior of the curler head. The air inlet may open at a location on the side wall of the curler head at the inlet end to draw air towards the curler head. In use, drawing air towards the side wall of the curler head at the inlet end draws hair down against the curler head at the inlet end. This prevents hair from moving beyond the inlet end, for example onto an integrated handle or onto a blower to which the curler head is attached.

[0226] The venturi may be at the inlet end, in which case the air inlet may be an aperture in the sidewall forming the venturi. It will be appreciated that, alternatively or in addition, the air inlet may include a duct extending from an inlet port at the inlet end to another location along the curler head. In some examples, the inlet end venturi is at a segment 280 of the curler head at the inlet end 112, which segment 280 includes a venturi, with one or more inlets through the sidewall of the curler head leading into the venturi to draw air through the sidewall of the curler head 102. Drawing air through the sidewall of the curler head 102 at the inlet end 112 encourages, for example, hair to remain on the curler head 112, rather than moving beyond the end 112 onto an integrated handle or onto the body of a blower to which the head 102 is attached.

[0227] 111-117, the exemplary head 102 includes a segment 280 at the inlet end 112 that includes a venturi 340. The venturi 340 may be formed in any suitable manner. The exemplary venturi 340 of FIGS. 111-117 is formed by gradually reducing and then increasing the diameter of the head air passage 130. The gradual change in transverse airflow area may reduce turbulence in the air passage during use. However, it will be appreciated that the venturi 340 may also or alternatively be formed using a non-gradual change in transverse airflow area, such as one or more step reductions in transverse airflow area followed by one or more step increases in transverse airflow area.

[0228] The inlet 300 leads into a venturi 340 in the inlet end segment 280 (i.e., the segment closest to the inlet end 112) such that, in use, airflow drawn through the inlet 300 pulls hair near the inlet end 112 down against the curler head 102, e.g., to prevent movement of the hair beyond the inlet end 112. Any suitable inlet shape can be used. The exemplary inlets 300 in Figs. 111-117 are arranged in an annular ring of discontinuous inlets 300 of generally constant size. The exemplary inlets 300 in Figs. 111-117 are each rectangular with generally equal longitudinal and angular extents. However, the inlets 300 may be slot-shaped or circular, for example. The exemplary inlets 300 in Figs. 111-117 are each simple apertures in a sidewall of the segment 280. However, the inlet 300 may include a duct extending between the outer end and the inner end, the duct may have one or more bends, for example. It will be appreciated that the inlet 300 may also function as a bleed air inlet and may optionally be closeable.

[0229] In operation, air flowing axially through the curler head core (eg, induced by a fan and motor assembly) draws air through the apertures in the sidewalls where it combines with air flowing through the airflow passages in the curler head core.

[0230] Axially extending surface depression The following is a description of a curler head having axially extending surface indentations in a surface of the curler head (e.g., an axially extending curved segment of the outer wall of the curler head). Thus, according to this embodiment, the indentations define axially extending lobes. Any curler outlet 150 may be used.

[0231] Thus, the curler head may include multiple parallel airflow branches. The multiple airflow branches may be angularly adjacent or angularly spaced apart. The multiple airflow branches may be formed by angularly adjacent longitudinally extending tubes. These tubes or ducts may be individually formed conduits that are secured together or may be integrally formed.

[0232] 10-18, the exemplary curler head 102 includes generally parallel, axially extending recesses 310. The exemplary axially extending recesses 310 extend generally parallel to the longitudinal axis.

[0233] 10-18, the exemplary curler head 102 includes a bundle of axially extending tubes 312 that extend generally parallel to one another. The exemplary tubes each form an airflow branch between the head inlet 132 and the outlet 134. In some examples, the recesses 310 are formed by abutting multiple tubes of the bundle of tubes 312, although it will be appreciated that the axially extending recesses 310 may be formed by raised portions of a single tube.

[0234] The outlets in the recesses may be curler outlets 150 and / or secondary air outlets 294. Curler outlets 150 are optionally in axially extending recesses to direct air on an outlet vector that includes a tangential component 154. Curler outlets 150 may comprise outlet ports 136 that open through a body sidewall, such as when opening through a generally radially extending portion of a sidewall formed by a lateral surface of the recess.

[0235] First end without a curler outlet The following is a description of a curler head that includes a first end 112 having a non-curler segment 280b (e.g., closed segment 222) without a curler outlet. According to this embodiment, the outlet 134 is axially spaced from the head air inlet 132 of the curler head 102.

[0236] That portion of the first end 112 of the curler head has a closed (air impermeable) body sidewall 120 that extends across an axial extent from the first end 112. The axial extent can be at least 10%, at least 20%, or at least 30% of the total axial extent of the curler head. A head air inlet 132 is at the first end 112, and an air passage 130 extends from the inlet 132 through the closed end portion of the sidewall.

[0237] 14-18, the example curler head 102 includes a closed end portion 222 without a curler outlet 150. The closed end portion 222 can provide space for additional components axially spaced from the curler outlet 150, such as a heating element, an air movement member, and / or a valve assembly. The example closed end portion 222 of FIGS. 14-18 includes a selectively openable bleed air inlet 300. The closed end portion provides space within the curler head without the need for a corresponding curler outlet.

[0238] Auxiliary second end heating The following is a description of providing supplemental heating to the head second end 114. Supplemental heating at the second end is used to provide more uniform heating along the length of the curler head 102. In an example where the curler head 102 is used with a blower 182 providing heated air, the heated air enters the curler head at the head first end 112 and then travels along the air passage 130 towards the head second end 114. As the air travels to the head second end 114, energy is transferred to the walls of the curler head 102 and lost to the outside environment. As a result, the energy carried by the air entering the curler head 102 heats the head first end 112 more than the head second end 114.

[0239] Supplemental second end heating includes using a heating member 191 (e.g., an electrical heating element 190 to heat the air or a portion of the curler head itself, and / or an infrared emitting source in combination with an infrared absorbing member 370) at the head second end 114. As discussed elsewhere herein, the heating member 191 may be provided in the air flow path to heat the air, may be oriented in conductive thermal communication with hair wrapped about the head 102, and / or may be positioned to direct infrared energy directly at hair wrapped about the curler head.

[0240] It will be appreciated that the heating member may be positioned to heat air flowing through an internal air passage within the curler head, or may be positioned to conductively heat a portion of the curler head itself.

[0241] It will be appreciated that the supplemental heating member 191 may be located only at the second end 114 or may be provided axially inwardly thereof. For example, the supplemental heating member 191 may be positioned and operable to provide additional heat downstream from the inlet 132 such that a uniform or more uniform temperature is provided by the curler head along the axial length of the curler head having the curler air outlet 150. Thus, the air exiting the curler outlet along the length of the curler head may be uniform or generally uniform (e.g., ±5, 10, 15° C.).

[0242] 85-90, in an exemplary embodiment, curler head 102 includes an electrical heating element 190 that generates infrared radiation. The exemplary heating element of FIGS. 85-90 is positioned to direct infrared radiation toward an infrared absorbing member 370 disposed along the length of curler head 102.

[0243] The exemplary infrared absorbing member 370 of Figures 85-90 comprises iron and / or carbon and is in conductive thermal communication with the hair wrapped around the head 102 and forms an outer surface of the head 102 (e.g., forming the land portion 160).

[0244] The exemplary infrared radiation source 190 in FIGS. 85-90 is at the head second end 114. In some examples, the infrared radiation source 190 for supplemental second end heating is provided within the last 25% of the length of the curler head 102, within the last 20% of the length of the curler head 102, or within the last 10% of the length of the curler head. By providing the infrared radiation source 190 at the second end 114, the heat energy generated by the radiation source 190 is concentrated at the second end 114 because the radiation source 190 provides more energy to the closer absorbing members 370 (i.e., the absorbing members 370 closer to the second end 114). It will be appreciated that the infrared absorbing members 370 may also or alternatively be provided only at the second end 114.

[0245] Air moving member in curler head The following is a description of curler head 102 including one or more air movement members 180. The inclusion of air movement members in curler head 102 can provide greater control over the airflow (e.g., amount or velocity) allowing the airflow to be optimized for the curler head. Curler head 102 including air movement members can be separate from a blower and can form a stand-alone curler apparatus 100.

[0246] The air movement member may be located radially below one or more curler outlets 150 or may be located within a closed segment 222 of body sidewall 120 where no curler outlets are provided. With reference to FIGURE 75, an exemplary curler head includes an air movement member 180 and is usable independently of a blower.

[0247] It will be appreciated that the air movement member may be complementary to the air movement member in the blower and may be used simultaneously with that air movement member for part or all of the time that the curler head is used. For example, the air movement member may be activated when a higher flow rate is desired.

[0248] Heating element in curler head The following is a description of the curler head 102 including the heating element 191.

[0249] According to this embodiment, the heating member may be positioned to heat the air flowing through an internal air passage within the curler head, or may be positioned to conductively heat a portion of the curler head itself. Thus, the heating member 191 may be an infrared emitting source in combination with an electrical current heating element 190 and / or an infrared absorbing member 370 to heat the air or a portion of the curler head itself.

[0250] 85-90, the exemplary heating element 190 is an infrared heating element. The exemplary infrared heating element 190 of FIGS. 85-90 includes a heat dissipating element 372 (e.g., a resistive filament) encased in a housing 374. The housing 374 is transparent to infrared radiation (i.e., includes at least one window formed of a material transparent to infrared radiation). In some examples, the housing 374 is formed of infrared-transparent aluminum.

[0251] The infrared radiation source 190 of the curler head 102 can be used to directly heat hair (e.g., hair positioned against the head 102 by an airflow) and / or can be used to heat one or more infrared absorbing members 370 of the curler head 102. All or a portion of the curler head 102 can be lined with an infrared absorbing material (e.g., iron and / or carbon) that forms one or more infrared absorbing members 370. The infrared absorbing members 370 can be lined on the inner and / or outer surfaces of the curler head 102. The exemplary curler head 102 of Figures 85-90 is lined with an infrared absorbing member 370 that forms the land portion 160.

[0252] Any suitable infrared absorbing member 370 may be used. The infrared absorbing member 370 may be a layer of infrared absorbing material that forms the exterior surface of the curler head 102, or may be covered with a thermal insulating layer (e.g., plastic) to reduce the possibility of contact burns.

[0253] The infrared absorbing member 370 may be formed in the curler head 102 in any suitable manner. In some examples, the infrared absorbing member 370 is combined with the body of the curler head 102. In some examples, the infrared absorbing member 370 is formed by vapor deposition, such as vapor deposition of a thermally conductive plastic (e.g., an infrared absorbing material such as iron in a plastic) or by applying a layer of an infrared absorbing material such as carbon by spray deposition.

[0254] The infrared heating element 190 can extend along all or part of the length of the curler head 102. As illustrated in Figures 85-90, the infrared heating element 190 can be provided at the head second end 114.

[0255] direct hair heating Below is a description of a curler head that heats the hair directly to reduce the amount of heat energy swept away by the air used to position the hair.

[0256] According to this embodiment, the curler head includes a heated hair receiving surface of the curler head 102. The heated hair receiving surface is heated by a heating element 190 of the curler head 102 and / or a heating element 190 of a cooperating blower 182. In some examples, the heated hair receiving surface is separated from the air flow passage 130 to prevent transfer of heat from the heated hair receiving surface to the airflow. The heated hair receiving surface may be separated from the air flow passage 130 by an underlying insulating layer.

[0257] By providing a heated hair receiving surface, thermal energy can be transferred directly to the hair received at the surface via conductive transfer. This reduces energy loss to the surrounding environment and allows the curler 100 to effectively increase the temperature of the hair using less energy than if the thermal energy were carried by air. By separating the heated surface from the air flow, the amount of heat swept away from the curler head 102 by the air flow is reduced. Thus, the air flow can be used primarily or solely to position hair around the curler without substantially heating the hair. Heat can be provided by the heated surface via conductive transfer and / or infrared radiation of hair positioned against the heated surface.

[0258] The heated surface can be heated in any suitable manner. The curler head 102 can include a heating element 190, which is an infrared radiation source that directs infrared energy to an absorbing member 370 that forms the heated surface or is in conductive thermal communication with the heated surface. Alternatively or additionally, the curler head 102 can include a heating element 190 that forms the heated surface itself or is in conductive thermal communication with the heated surface. With reference to FIGS. 92-96, an exemplary curler head 102 includes a plurality of electrical current heating elements 190. The exemplary heating elements 190 in FIGS. 92-96 are flat heating elements (e.g., thin film heating elements) that form the land portion 160 and, optionally, the radially outer surface of the curler outlet 150 nearest the first end 112 for direct conductive heat transfer to hairs placed against these heated surfaces.

[0259] 92-96, the exemplary heating element 191 defines a heated surface 380. The heated surface 380 is separated from the air flow path 130. By separating the heated surface 380 from the air flow path, the transfer of thermal energy to the air, which may otherwise be significantly lost to the surrounding environment, is reduced.

[0260] Heated surface 380 is separated from air flow path 130 by an insulating layer 382. Insulating layer 382 underlies heated surface 380 and inhibits heat transfer from heated surface 380 to the air in air flow path 130. Insulating layer 382 may be formed of any suitable material, such as a thermoplastic material. With reference to FIGS. 92-96, an exemplary insulating layer 382 underlies heated surface 380, and heated surface 380 extends across outer land portion 160 of curler outlet 150.

[0261] inductive charging The following is a description of the inductively charged curler head 102. The curler head includes an internal energy storage member 200, which is charged by wireless charging through electromagnetic induction.

[0262] Referring to FIG. 76, the exemplary curler head 102 includes a power receiving side 320 (e.g., a receiving coil) that cooperates with a charging stand 322 to receive power. The charging stand is operable to generate a magnetic field (e.g., via a coil in the stand) at the power receiving side 320 of the curler head to generate a current in the power receiving side 320. The exemplary curler head is oriented such that its longitudinal axis is generally vertical when charging. The charging stand 322 includes a base 324 and a cradle 326 positioned relative to the base 324 to hold the curler head such that its longitudinal axis is generally vertical. In some examples, an end of the curler head is received in a recess 328 of the induction charging stand. The power receiving side 320 can be at the end that is received in the recess 328. The recess 328 can be surrounded by a power transmitting portion of the charging stand.

[0263] In some examples, a component 330 of an inductive charging stand is received in a recess 332 in the end of the curler head 102. The component 330 may include a power transmitting portion of the charging stand. The recess 332 may be surrounded by the power receiving side 320.

[0264] It will be appreciated that any inductively charging member may be used, which may be of any configuration capable of inductively altering the curler head.

[0265] Manufacturing method The following is a description of a method for manufacturing the curler head 102.

[0266] According to this embodiment, the curler head 102 can be formed by separately manufacturing the main tube and set of rings and then placing the rings by sliding them axially over the main tube.

[0267] 77 and 78-84, the curler head 102 can be formed by a manufacturing method 350. The method 350 includes, at step 354, forming a main tube 352, such as by forming an aluminum tube from a sheet of aluminum or molding a plastic tube. In use, the main tube 352 can function as a framework to which further portions of the curler head 102 are secured.

[0268] The main tube 352 includes apertures 353 therethrough. The apertures 353 are provided to allow air to flow through the main tube 352 and out of the curler outlet 150 of the curler head 102. The apertures 353 may form the inlet ports 140 of the curler outlet 150. With particular reference to FIG. 84 , the exemplary tube 352 includes apertures 353 at regular intervals along the length of the tube 352.

[0269] The aperture is formed in the wall of the main tube 352 by any suitable method. In some examples, the aperture 353 is formed by molding the tube in which the aperture 353 is formed, such as when the tube is injection molded or 3D printed plastic. In some examples, the aperture 353 is formed by cutting out a portion of the tube side wall, such as when the tube is formed from a rolled piece of metal (e.g., aluminum).

[0270] The method 350 includes, at step 356, forming one or more rings 358. The exemplary ring 358 of FIGS. 78-84 includes vanes 142 and an outer wall 260. Alternatively or in addition, vanes 142 may be provided on the main pipe 352. As illustrated in FIG. 81, the curler head 102 may include different types of rings 358a, 358b, such as for forming different types of outlets or different types of curler outlets 150. The rings 358 may be plastic and may be formed, for example, by injection molding or 3D printing. The rings 358 may include an infrared absorbing member 370. At step 360, the rings 358 are slid onto the pipe over the inlet port 140 to complete the duct 138.

[0271] The ring 358 may be secured to the main tube 352 in any suitable manner. In some examples, the ring 358 is fastened using fasteners. For example, the ring may be snapped into place on the main tube 352 using snap-fit ​​fasteners on the ring 358 and / or the tube 352, the ring may be held by cooperating magnetic fasteners on the ring 358 and the tube 352, or the ring may be secured by a separate fastener, such as a threaded fastener. Alternatively or additionally, the ring 358 may be bonded to the tube 352, such as by adhesive or welding. With reference to FIG. 77, the exemplary method 350 includes, at step 362, heating a curler head to mount the ring onto the tube (e.g., to melt the plastic of the ring and fuse the ring to the plastic or metal tube).

[0272] Abutting Segment The following is a description of a curler head 280 in which the outlet 150 is formed of one single wall, with adjacent walls abutting one another longitudinally to form the curler head outer wall 260. The adjacent walls may abut without overlapping.

[0273] 97-103, and in particular FIG. 100, the exemplary curler head 102 includes a main tube 352 and a plurality of rings 358 attached to the tube. The rings 352 are formed of one unitary body and define one or more curler outlets 150 opening therethrough. Adjacent rings 352 abut one another at seams 390. In use, the curler head 102 can be assembled by molding the tube 352, molding the rings 358, sliding the rings 358 over the tube 352, and securing the rings 358 to the tube 352 and / or adjacent rings 358.

[0274] The ring 358 may be secured to the tube 352 and / or adjacent ring 358 in any suitable manner, such as with fasteners, welding, or adhesive. In the exemplary embodiment of FIGS. 97-103, the ring 352 is secured to the tube 352 and adjacent ring 358 by welding an inner surface of the ring 352 to the tube 352 and welding a longitudinal end of the ring 352 to an adjacent ring 352 across a seam 390. Welding may be accomplished, for example, by heating a curler head to fit the ring over the tube (e.g., to melt the plastic of the ring and fuse the ring to the plastic or metal tube).

[0275] User Interface The following is a description of the user interfaces 204. The hair curling device 100 may include one or more user interfaces 204 for controlling one or more operations of the hair curling device 100.

[0276] The user interface 204 can include at least an on / off actuator that controls whether the air movement member 180 is on or off. In some examples, the user interface 204 can also include additional controls, such as controls for setting the rotational speed of the air movement member, and / or controls for turning a heating element on / off and / or setting the temperature of the heating element, and / or controls for shifting, opening, or closing a valve.

[0277] It will be appreciated that the actuator may be any suitable user interface, such as an on / off toggle, a push button, a display screen, a touch screen, a sliding switch, or the like.

[0278] 14-18 and 20-24, an example user interface 204 includes a valve toggle 206 for controlling the position of a valve 208.

[0279] In some examples, the hair curling device 100 includes a blower user interface 204 for the blower 182 and a head user interface 204 for the curler head 102. The user interface 204 may include simple circuitry for controlling the controllable elements of the hair curling device 100, or may include one or more computer processors and / or data storage systems that store instructions (e.g., to allow a user to select pre-programmed modes of operation). In some examples, the user interface 204 includes a user-operable (i.e., manual) or energized actuator that is drivingly coupled to an actuatable member, such as a valve.

[0280] accessories As illustrated in FIG. 19, in some examples, the curler device 100 includes one or more attachments 212. The attachment 212 may be a sprayer having a nozzle 214 directed toward the hair-receiving surface of the curler head 102. The sprayer can spray a fluid, such as water, onto the hair. Wet hair can be set more easily than dry hair. The sprayer can include a reservoir 216 in fluid communication with the nozzle 214 and a pump 218 operable to selectively move fluid from the reservoir to the nozzle.

[0281] The term "and / or" as used herein is intended to represent an inclusive "or." That is, "X and / or Y" is intended to mean, for example, X or Y, or both. As a further example, "X, Y, and / or Z" is intended to mean X or Y or Z, or any combination thereof.

[0282] Although the above description describes features of the example embodiments, it will be understood that some features and / or functions of the described embodiments can be modified without departing from the spirit and principles of operation of the described embodiments. For example, various features described by the illustrated embodiments or examples can be selectively combined with each other. Thus, what has been described above is intended to be illustrative and not limiting of the claimed concepts. Those skilled in the art will appreciate that other variations and modifications can be made without departing from the scope of the present invention as defined in the appended claims. The claims should not be limited by the preferred embodiments and examples, but should be given the broadest interpretation consistent with the specification as a whole.

[0283] Terms Clause Set A 1. A hair curler having an inlet end having an air inlet, a longitudinally spaced second end, a longitudinal axis, and a plurality of axially spaced air outlets, some of the air outlets directing air in a clockwise direction and other air outlets directing air in a counterclockwise direction. 2. The hair curler of clause 1, further comprising a valve operable to selectively direct air to an air outlet that directs air in a clockwise direction and an air outlet that directs air in a counterclockwise direction. 3. A hair curler as described in clause 1, wherein the air outlet comprises a plurality of sets of air outlets, each set of air outlets comprising a plurality of air outlets positioned at an angle around the longitudinal axis. 4. The hair curler of clause 3, wherein the multiple sets of air outlets include a first set of air outlets and a second set of air outlets, the first set of air outlets directing air in a clockwise direction and the second set of air outlets directing air in a counterclockwise direction. 5. The hair curler of clause 4, further comprising a valve operable to selectively direct air to a first set of air outlets that directs air in a clockwise direction and a second set of air outlets that directs air in a counterclockwise direction. 6. The hair curler of clause 3, wherein the multiple sets of air outlets include a first set of air outlets and a second set of air outlets, and the land portion is located between the first set of air outlets and the second set of air outlets. 7. A hair curler as described in clause 6, the land portion of which is airtight. 8. The hair curler of clause 1, wherein the air outlet has a radially outer surface located radially outward of the land portion at the location of the air outlet. 9. A hair curler as described in clause 1, wherein the land portion is positioned between adjacent air outlets. 10. The hair curler of clause 1, wherein the air outlets direct air generally along an outer surface of the hair curler, and wherein air exiting the air outlets travels along the outer surface. 11. A hair curler as described in clause 1, wherein each air outlet includes an outlet duct extending from an inlet port to an outlet port, the outlet port having a radially outer surface located radially outward of the land portion at the location of the outlet port. 12. A hair curler as described in clause 1, wherein each air outlet includes an outlet duct extending from an inlet port to an outlet port, and the air flow path includes a passageway inside the air curler and an inlet port air located within the passageway. 13. The hair curler of clause 12, wherein the passage has a radially outer wall and the inlet port has a radially inner surface located radially inward of the radially outer wall. 14. A hair curler as described in clause 1, wherein the air outlet comprises a plurality of sets of air outlets, each set of air outlets comprising a plurality of air outlets angularly positioned about the longitudinal axis, the plurality of sets of air outlets comprising a first set of air outlets and a second set of air outlets, each air outlet comprising an outlet duct extending from an inlet port to an outlet port, and the outlet ports of the first set of air outlets are axially aligned with the outlet ports of the second set of air outlets and the outlet ports of the third set of air outlets. 15. The hair curler described in clause 1, wherein the air outlet comprises a plurality of sets of air outlets, each set of air outlets comprising a plurality of air outlets angularly positioned about the longitudinal axis, the plurality of sets of air outlets comprising a first set of air outlets, a second set of air outlets and a third set of air outlets, each air outlet comprising an outlet duct extending from an inlet port to an outlet port, the first, second and third sets of air outlets defining a plurality of axially extending rows of outlet ports that are axially aligned. 16. The hair curler according to clause 1, wherein the air outlet comprises a plurality of sets of air outlets, each set of air outlets comprising a plurality of air outlets positioned at an angle about the longitudinal axis, the plurality of sets of air outlets comprising a first set of air outlets, a second set of air outlets and a third set of air outlets, each air outlet comprising an outlet duct extending from an inlet port to an outlet port, the first, second and third sets of air outlets defining a plurality of axially extending rows of outlet ports, and for each row of outlet ports the outlet ports are positioned at an angle about the longitudinal axis. 17. A hair curler as described in clause 1, wherein the air outlet comprises a plurality of sets of air outlets, each set of air outlets comprising a plurality of air outlets positioned at an angle around the longitudinal axis, the plurality of sets of air outlets comprising a first set of air outlets, a second set of air outlets and a third set of air outlets, each air outlet comprising an outlet duct extending from an inlet port to an outlet port, and for each row of outlet ports, the outlet ports of the second set of outlet ports are positioned at an angle around the longitudinal axis from the outlet ports of the first set of outlet ports and the outlet ports of the third set of outlet ports are positioned at an angle around the longitudinal axis from the outlet ports of the second set of outlet ports.

[0284] Clause Set B 1. A hair curler having an inlet end having an air inlet, a longitudinally spaced second end, a longitudinal axis, a plurality of curling air outlets, a diffuser air outlet, and a valve operable between a first position in which the curling air outlet is in fluid communication with the air inlet and a second position in which the diffuser air outlet is in fluid communication with the air inlet. 2. A hair curler as described in clause 1, comprising a body extending between an inlet end and a second end, the curler air outlet being provided along the longitudinal extent of the body, and the diffuser air outlet being provided at the second end. 3. The hair curler of claim 1, further comprising a removably attachable diffuser attachment, the diffuser attachment being provided at the diffuser air outlet. 4. The hair curler according to clause 3, wherein the diffuser attachment is provided at the second end. 5. The hair curler of clause 1, further comprising a user-operable actuator drivingly connected to the valve. 6. A hair curler as described in clause 1, wherein the curling air outlet comprises a plurality of sets of curling air outlets, each set of curling air outlets comprising a plurality of curling air outlets positioned at an angle about the longitudinal axis. 7. The hair curler of clause 6, wherein the multiple sets of curling air outlets include a first set of curling air outlets and a second set of curling air outlets, the first set of curling air outlets directing air in a clockwise direction and the second set of curling air outlets directing air in a counterclockwise direction. 8. The hair curler of clause 7, further comprising a valve operable to selectively direct air to a first set of curling air outlets that directs air in a clockwise direction and a second set of curling air outlets that directs air in a counterclockwise direction. 9. The hair curler of clause 6, wherein the multiple sets of curling air outlets include a first set of curling air outlets and a second set of curling air outlets, and the land portion is located between the first set of air outlets and the second set of air outlets. 10. A hair curler as described in clause 9, the land portion of which is airtight. 11. The hair curler according to clause 1, comprising a curling air axially extending passage disposed upstream of the curling air outlet and downstream of the valve, and a diffuser air axially extending passage disposed upstream of the diffuser air outlet and downstream of the valve. 12. A hair curler as described in clause 11, wherein the diffuser air axially extending passage is disposed within the curling air axially extending passage. 13. A hair curler as described in clause 11, wherein each curling air outlet includes an outlet duct extending from an inlet port to an outlet port, the outlet port having a radially outer surface located radially outward of an airtight land portion at the location of the outlet port. 14. The hair curler according to clause 13, wherein the inlet port is located in the curling air axially extending passage. 15. A hair curler as described in clause 14, wherein the curling air axially extending passage has a radially outer wall and the inlet port has a radially inner surface located radially inward of the radially outer wall. 16. A hair curler as described in clause 1, wherein the curling air outlet includes a plurality of axially spaced outlet ports, and the land portion is located between adjacent outlet ports. 17. A hair curler as described in clause 13, the land portion of which is airtight. 18. The hair curler of claim 11, further comprising a bleed valve in the curling air axially extending passage. 19. The hair curler of claim 11, further comprising a pressure relief valve in the curling air axially extending passageway. 20. The hair curler of claim 19, further comprising a bleed valve in the curling air axially extending passage.

[0285] Clause Set C 1. A hair curler having an inlet end having an air inlet, a longitudinally spaced second end, a bleed valve, and an air flow path from the air inlet to an air outlet. 2. The hair curler as described in clause 1, wherein the bleed valve is operable during the curling operation, and when ambient air is introduced into the air flow passage and the bleed valve is opened, the temperature of the air exiting the air outlet is reduced. 3. A hair curler as described in clause 1, wherein the bleed valve is operable at the end of the curling action to introduce ambient air into the air flow passage and reduce the curling force generated by the air outlet. 4. The hair curler according to clause 1, wherein the bleed valve is located at the inlet end of the hair curler. 5. The hair curler according to clause 1, wherein the bleed valve is located inside the hair curler and located longitudinally between the inlet end and the air outlet. 6. The hair curler described in clause 1, wherein the air outlet comprises a first annular band of curler air outlets including a plurality of outlet ducts, each outlet duct extending from an inlet port to an outlet port, the outlet ports being positioned at angles around the hair curler. 7. A hair curler as described in clause 6, wherein the air exiting the outlet duct exits at an angle of between 10° and 30° from a plane intersecting the longitudinal axis of the hair curler. 8. A hair curler as described in clause 6, wherein the air exiting the outlet duct exits at an angle of 15 to 25° or 17 to 23° from a plane intersecting the longitudinal axis of the hair curler. 9. A hair curler as described in clause 1, wherein the second end is closed. 10. The hair curler according to clause 8, wherein the second end is openable. 11. A hair curler as described in clause 6, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 12. A hair curler as described in clause 6, wherein the land portion extends in a direction away from the first annular strip of curler air outlets and the outlet port is located radially outward of an outer surface of the land portion. 13. A hair curler as described in clause 6, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the location of the first annular band of the curler air outlet. 14. The hair curler of clause 6, further comprising a second annular band of curler air outlets spaced longitudinally from the first annular band of curler air outlets, the land portion being positioned between the first annular band of curler air outlets and the second annular band of curler air outlets, each of the first and second annular bands of curler air outlets including a plurality of outlet ducts, the outlet ducts of the first annular band of curler air outlets generating a first Coanda air flow and the outlet ducts of the second annular band of curler air outlets generating a second Coanda air flow. 15. A hair curler as described in clause 6, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, the land portion having a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, the first Coanda air flow rotating around the first portion of the land portion and the second Coanda air flow rotating around the second portion of the land portion. 16. The hair curler according to clause 1, wherein the air outlet includes a plurality of outlet ducts, at least some of the outlet ducts having an upstream expansion zone and a downstream contraction zone. 17. A hair curler as described in clause 1, wherein the air outlet includes a plurality of outlet ducts, at least some of the outlet ducts having a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 18. The hair curler of clause 6, wherein the land portion extends away from the first annular strip of the curler air outlet, and the land portion comprises metal. 19. A hair curler as described in clause 18, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 20. A hair curler as described in clause 6, wherein a first set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a first side of the first annular strip of curler air outlet facing longitudinally inward towards the air inlet of the hair curler, and a second set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a second side of the first annular strip of curler air outlet facing longitudinally outward towards the second end of the hair curler. 21. The hair curler according to clause 6, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is smooth. 22. The hair curler of clause 6, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is textured. 23. A hair curler as described in clause 22, wherein the land portion has a recessed surface. 24. A hair curler as described in clause 22, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 25. A hair curler as described in clause 22, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 26. A hair curler as described in clause 1, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion has a unidirectional mechanical hair engagement member that engages the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite the first direction. 27. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 28. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 29. A hair curler as described in clause 6, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is impermeable to air. 30. The hair curler of clause 6, wherein the first annular band of the curler air outlet includes a raised ring extending about the longitudinal axis. 31. A hair curler as described in clause 1, wherein the bleed valve includes a venturi.

[0286] Clause Set D 1. A hair curler having an inlet end, a longitudinally spaced second end, and a longitudinal axis, the inlet end having an air inlet, (a) a first annular band of curler air outlets including a plurality of first outlet ducts, each first outlet duct extending from an inlet port to an outlet port, the first annular band of curler air outlets being located a first distance from the inlet end, the first outlet ports being positioned at an angle about the longitudinal axis; (b) a second annular band of curler air outlets including a plurality of second outlet ducts, each of the second outlet ducts extending from an inlet port to an outlet port, the second annular band of curler air outlets located a second distance from the inlet end, the second outlet ports being positioned angularly about the longitudinal axis, the second distance being greater than the first distance; (c) an air flow passage from the air inlet to the first and second annular bands of the curler air outlet; (d) an airtight land portion extending between the first annular strip of the curler air outlet and the second annular strip of the curler air outlet, the land portion having a longitudinal length greater than a longitudinal length of the first annular strip of the curler air outlet; A hair curler equipped with 2. A hair curler as described in clause 1, wherein the second end is closed. 3. A hair curler as described in clause 1, wherein the second end is openable. 4. The hair curler according to clause 1, wherein the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 5. A hair curler as described in clause 1, wherein each of the first outlet ducts extends from an inlet port in air flow communication with the air inlet and an outlet port, the outlet port being located radially outward of the outer surface of the land portion. 6. A hair curler as described in clause 1, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the position of the first annular band of the curler air outlet. 7. A hair curler as described in clause 1, wherein the first outlet duct generates a first Coanda airflow and the second outlet duct generates a second Coanda airflow. 8. A hair curler as described in clause 7, wherein the land portion has a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, the first Coanda air flow rotating around the first portion of the land portion and the second Coanda air flow rotating around the second portion of the land portion. 9. The hair curler according to clause 7, wherein the air exiting each of the first and second outlet ducts exits at an angle of between 10° and 30° from a plane transverse to the longitudinal axis of the hair curler. 10. A hair curler as described in clause 7, wherein the air exiting each of the first and second outlet ducts exits at an angle of 15 to 25° or 17 to 23° from a plane intersecting the longitudinal axis of the hair curler. 11. The hair curler according to clause 1, wherein at least some of the first and second outlet ducts have an upstream expansion zone and a downstream contraction zone. 12. A hair curler as described in clause 1, wherein at least some of the first and second outlet ducts have a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 13. A hair curler as described in clause 1, wherein the land portion comprises metal. 14. A hair curler as described in clause 13, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 15. A hair curler as described in clause 1, wherein a first set of outlet ports of the second outlet duct of the second annular strip of curler air outlet is provided on a first side of the second annular strip of curler air outlet facing longitudinally inward towards the air inlet of the hair curler, and a second set of outlet ports of the second outlet duct of the second annular strip of curler air outlet is provided on a second side of the second annular strip of curler air outlet facing longitudinally outward towards the second end of the hair curler. 16. The hair curler of clause 1, further comprising a bleed valve. 17. The hair curler as described in clause 16, wherein the bleed valve is operable during the curling operation whereby ambient air is introduced into the air flow passage and the temperature of the air exiting the outlet port is reduced when the bleed valve is opened. 18. A hair curler as described in clause 16, wherein the bleed valve is operable at the end of the curling action so that ambient air is introduced into the air flow passage and the curling force generated by the outlet duct is reduced. 19. The hair curler according to clause 16, wherein the bleed valve is located at the first end of the hair curler. 20. A hair curler as described in clause 16, wherein the bleed valve is located inside the hair curler and located longitudinally between the inlet end and the first annular strip of the curler air outlet. 21. A hair curler as described in clause 1, wherein the land portion is smooth. 22. A hair curler as described in clause 1, wherein the land portion is textured. 23. A hair curler as described in clause 22, wherein the land portion has a recessed surface. 24. A hair curler as described in clause 22, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 25. A hair curler as described in clause 22, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 26. A hair curler as described in clause 1, wherein the land portion has a unidirectional mechanical hair engagement member that engages with the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite to the first direction. 27. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 28. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 29. A hair curler as described in clause 1, the land portion of which is airtight. 30. A hair curler as described in clause 1, wherein each of the first and second annular bands of the curler air outlets includes a raised ring extending around the longitudinal axis.

[0287] Clause Set E 1. A hair curler having an inlet end, a longitudinally spaced second end, and a longitudinal axis, the inlet end having an air inlet, a first annular strip of curler air outlets, a land portion extending away from the first annular strip of curler air outlets, and an air flow passage from the air inlet to the first annular strip of curler air outlets, the first annular strip of curler air outlets including a plurality of outlet ducts, each outlet duct extending from an inlet port to an outlet port, the outlet ports positioned at an angle about the longitudinal axis, and the outlet ducts generating a Coanda air flow. 2. The hair curler of claim 1, wherein the air exiting the outlet port exits at an angle of between 10° and 30° from a plane intersecting the longitudinal axis of the hair curler. 3. A hair curler as described in clause 1, wherein the air exiting the outlet duct exits at an angle of 15 to 25° or 17 to 23° from a plane intersecting the longitudinal axis of the hair curler. 4. A hair curler as described in clause 1, wherein the second end is closed. 5. The hair curler according to clause 1, wherein the second end is openable. 6. The hair curler according to clause 1, wherein the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 7. A hair curler as described in clause 1, wherein each of the first outlet ducts extends from an inlet port in air flow communication with the air inlet and an outlet port, the outlet ports being located radially outward of the outer surface of the land portion. 8. A hair curler as described in clause 1, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the position of the first annular band of the curler air outlet. 9. A hair curler as described in clause 1, further comprising a second annular band of curler air outlets spaced longitudinally from the first annular band of curler air outlets, the land portion being positioned between the first annular band of curler air outlets and the second annular band of curler air outlets, an outlet duct of the first annular band of curler air outlets generating a first Coanda air flow and an outlet duct of the second annular band of curler air outlets generating a second Coanda air flow. 10. A hair curler as described in clause 9, wherein the land portion has a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, the first Coanda air flow rotating around the first portion of the land portion and the second Coanda air flow rotating around the second portion of the land portion. 11. The hair curler according to clause 1, wherein at least some of the outlet ducts have an upstream expansion zone and a downstream contraction zone. 12. A hair curler as described in clause 1, wherein at least some of the outlet ducts have a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 13. A hair curler as described in clause 1, wherein the land portion comprises metal. 14. A hair curler as described in clause 13, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 15. A hair curler as described in clause 1, wherein a first set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a first side of the first annular strip of curler air outlet facing longitudinally inward toward the air inlet of the hair curler, and a second set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a second side of the first annular strip of curler air outlet facing longitudinally outward toward the second end of the hair curler. 16. The hair curler of clause 1, further comprising a bleed valve. 17. A hair curler as described in clause 16, wherein the bleed valve is operable during the curling operation, and ambient air is introduced into the air flow passage so that when the bleed valve is opened, the temperature of the air exiting the outlet port is reduced. 18. A hair curler as described in clause 16, wherein the bleed valve is operable at the end of the curling action so that ambient air is introduced into the air flow passage and the curling force generated by the outlet duct is reduced. 19. The hair curler according to clause 16, wherein the bleed valve is located at the first end of the hair curler. 20. A hair curler as described in clause 16, wherein the bleed valve is located inside the hair curler and located longitudinally between the inlet end and the first annular strip of the curler air outlet. 21. A hair curler as described in clause 1, wherein the land portion is smooth. 22. A hair curler as described in clause 1, wherein the land portion is textured. 23. A hair curler as described in clause 22, wherein the land portion has a recessed surface. 24. A hair curler as described in clause 22, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 25. A hair curler as described in clause 22, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 26. A hair curler as described in clause 1, wherein the land portion has a unidirectional mechanical hair engagement member that engages with the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite to the first direction. 27. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 28. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 29. A hair curler as described in clause 1, the land portion of which is airtight. 30. The hair curler of clause 1, wherein the first annular band of the curler air outlet includes a raised ring extending around the longitudinal axis.

[0288] Clause Set F 1. A hair curler having an inlet end, a longitudinally spaced second end, and a longitudinal axis, the inlet end having an air inlet, a first annular strip of curler air outlet, a land portion extending away from the first annular strip of curler air outlet, and an air flow passage from the air inlet to the first annular strip of curler air outlet, the first annular strip of curler air outlet including a plurality of outlet ducts, each outlet duct extending from an inlet port to an outlet port and including angularly spaced apart vanes, the outlet ports being angularly positioned about the hair curler, and at the outlet ports the vanes extending at an angle of 10° to 30° from a plane transverse to the longitudinal axis of the hair curler. 2. A hair curler as described in clause 1, wherein at the exit port, the vanes extend at an angle of 15 to 25 degrees from a plane intersecting the longitudinal axis of the hair curler. 3. The hair curler of claim 1, wherein at the exit port, the vanes extend at an angle of 17 to 23 degrees from a plane intersecting the longitudinal axis of the hair curler. 4. A hair curler as described in clause 1, wherein the second end is closed. 5. The hair curler according to clause 1, wherein the second end is openable. 6. The hair curler according to clause 1, wherein the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 7. A hair curler as described in clause 1, wherein each of the first outlet ducts extends from an inlet port in air flow communication with the air inlet and an outlet port, the outlet ports being located radially outward of the outer surface of the land portion. 8. A hair curler as described in clause 1, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the position of the first annular band of the curler air outlet. 9. A hair curler as described in clause 1, further comprising a second annular band of curler air outlets spaced longitudinally from the first annular band of curler air outlets, the land portion being positioned between the first annular band of curler air outlets and the second annular band of curler air outlets, an outlet duct of the first annular band of curler air outlets generating a first Coanda air flow and an outlet duct of the second annular band of curler air outlets generating a second Coanda air flow. 10. A hair curler as described in clause 9, wherein the land portion has a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, the first Coanda air flow rotating around the first portion of the land portion and the second Coanda air flow rotating around the second portion of the land portion. 11. The hair curler according to clause 1, wherein at least some of the outlet ducts have an upstream expansion zone and a downstream contraction zone. 12. A hair curler as described in clause 1, wherein at least some of the outlet ducts have a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 13. A hair curler as described in clause 1, wherein the land portion comprises metal. 14. A hair curler as described in clause 13, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 15. A hair curler as described in clause 1, wherein a first set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a first side of the first annular strip of curler air outlet facing longitudinally inward toward the air inlet of the hair curler, and a second set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a second side of the first annular strip of curler air outlet facing longitudinally outward toward the second end of the hair curler. 16. The hair curler of clause 1, further comprising a bleed valve. 17. A hair curler as described in clause 16, wherein the bleed valve is operable during the curling operation, and ambient air is introduced into the air flow passage so that when the bleed valve is opened, the temperature of the air exiting the outlet port is reduced. 18. A hair curler as described in clause 16, wherein the bleed valve is operable at the end of the curling action so that ambient air is introduced into the air flow passage and the curling force generated by the outlet duct is reduced. 19. The hair curler according to clause 16, wherein the bleed valve is located at the first end of the hair curler. 20. A hair curler as described in clause 16, wherein the bleed valve is located inside the hair curler and located longitudinally between the inlet end and the first annular strip of the curler air outlet. 21. A hair curler as described in clause 1, wherein the land portion is smooth. 22. A hair curler as described in clause 1, wherein the land portion is textured. 23. A hair curler as described in clause 22, wherein the land portion has a recessed surface. 24. A hair curler as described in clause 22, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 25. A hair curler as described in clause 22, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 26. A hair curler as described in clause 1, wherein the land portion has a unidirectional mechanical hair engagement member that engages with the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite to the first direction. 27. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 28. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 29. A hair curler as described in clause 1, the land portion of which is airtight. 30. The hair curler of clause 1, wherein the first annular band of the curler air outlet includes a raised ring extending around the longitudinal axis.

[0289] Clause Set G 1. A hair curler having an inlet end, a longitudinally spaced second end, and a longitudinal axis, the inlet end having an air inlet, a first annular band of curler air outlets, a land portion extending away from the first annular band of curler air outlets, and an air flow passage from the air inlet to the first annular band of curler air outlets, the first annular band of curler air outlets including a plurality of outlet ducts, each outlet duct extending from an inlet port to an outlet port, the outlet ports being positioned at angles around the hair curler, at least some of the outlet ducts having an upstream diverging zone and a downstream converging zone. 2. The hair curler according to clause 1, wherein at least some of the outlet ducts have a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 3. A hair curler as described in clause 1, wherein the air exiting the outlet duct exits at an angle of between 10° and 30° from a plane intersecting the longitudinal axis of the hair curler. 4. A hair curler as described in clause 1, wherein the air exiting the outlet duct exits at an angle of 15 to 25° or 17 to 23° from a plane intersecting the longitudinal axis of the hair curler. 5. A hair curler as described in clause 1, wherein the second end is closed. 6. The hair curler according to clause 1, wherein the second end is openable. 7. The hair curler according to clause 1, wherein the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 8. A hair curler as described in clause 1, wherein each of the first outlet ducts extends from an inlet port in air flow communication with the air inlet and an outlet port, the outlet ports being located radially outward of the outer surface of the land portion. 9. A hair curler as described in clause 1, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the position of the first annular band of the curler air outlet. 10. A hair curler as described in clause 1, further comprising a second annular band of curler air outlets spaced longitudinally from the first annular band of curler air outlets, the land portion being positioned between the first annular band of curler air outlets and the second annular band of curler air outlets, an outlet duct of the first annular band of curler air outlets generating a first Coanda air flow and an outlet duct of the second annular band of curler air outlets generating a second Coanda air flow. 11. A hair curler as described in clause 10, wherein the land portion has a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, the first Coanda air flow rotating around the first portion of the land portion and the second Coanda air flow rotating around the second portion of the land portion. 12. A hair curler as described in clause 1, wherein the land portion comprises metal. 13. A hair curler as described in clause 12, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 14. A hair curler as described in clause 1, wherein a first set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a first side of the first annular strip of curler air outlet facing longitudinally inward toward the air inlet of the hair curler, and a second set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a second side of the first annular strip of curler air outlet facing longitudinally outward toward the second end of the hair curler. 15. The hair curler of clause 1, further comprising a bleed valve. 16. The hair curler as described in clause 15, wherein the bleed valve is operable during the curling operation, and ambient air is introduced into the air flow passage so that when the bleed valve is opened, the temperature of the air exiting the outlet port is reduced. 17. A hair curler as described in clause 15, wherein the bleed valve is operable at the end of the curling action so that ambient air is introduced into the air flow passage and the curling force generated by the outlet duct is reduced. 18. The hair curler according to clause 15, wherein the bleed valve is located at the first end of the hair curler. 19. A hair curler as described in clause 15, wherein the bleed valve is located inside the hair curler and located longitudinally between the inlet end and the first annular strip of the curler air outlet. 20. A hair curler as described in clause 1, wherein the land portion is smooth. 21. A hair curler as described in clause 1, wherein the land portion is textured. 22. A hair curler as described in clause 21, wherein the land portion has a recessed surface. 23. A hair curler as described in clause 21, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 24. The hair curler of claim 21, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 25. A hair curler as described in clause 1, wherein the land portion has a unidirectional mechanical hair engagement member that engages with the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite to the first direction. 26. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 27. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 28. A hair curler as described in clause 1, the land portion of which is airtight. 29. A hair curler as described in clause 1, wherein the first annular band of the curler air outlet includes a raised ring extending around the longitudinal axis.

[0290] Clause Set H 1. A hair curler having an inlet end having an air inlet, a longitudinally spaced second end, a pressure relief valve, and an air flow path from the air inlet to an air outlet. 2. A hair curler as described in clause 1, wherein the pressure relief valve is operable during the curling action such that some air is exhausted from the air flow passage through the pressure relief valve and the curling force generated by the air outlet is reduced. 3. The hair curler according to clause 1, wherein the pressure relief valve is located at the inlet end of the hair curler. 4. The hair curler according to clause 1, wherein the pressure relief valve is located inside the hair curler and located longitudinally between the inlet end and the air outlet. 5. The hair curler described in clause 1, wherein the air outlet comprises a first annular band of curler air outlets including a plurality of outlet ducts, each outlet duct extending from an inlet port to an outlet port, the outlet ports being positioned at angles around the hair curler. 6. A hair curler as described in clause 5, wherein the air exiting the outlet duct exits at an angle of between 10° and 30° from a plane intersecting the longitudinal axis of the hair curler. 7. A hair curler as described in clause 5, wherein the air exiting the outlet duct exits at an angle of 15 to 25° or 17 to 23° from a plane intersecting the longitudinal axis of the hair curler. 8. A hair curler as described in clause 1, wherein the second end is closed. 9. The hair curler according to clause 1, wherein the second end is openable. 10. The hair curler according to clause 9, wherein the pressure relief valve is provided at the second end. 11. A hair curler as described in clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the longitudinal length of the land portion is at least about twice the longitudinal length of the first annular strip of the curler air outlet. 12. A hair curler as described in clause 6, wherein the land portion extends in a direction away from the first annular strip of curler air outlets and the outlet port is located radially outward of an outer surface of the land portion. 13. A hair curler as described in clause 5, wherein the diameter of the first annular band of the curler air outlet is greater than the diameter of the land portion at the location of the first annular band of the curler air outlet. 14. A hair curler as described in clause 5, further comprising a second annular band of curler air outlets spaced longitudinally from the first annular band of curler air outlets, the land portion being positioned between the first annular band of curler air outlets and the second annular band of curler air outlets, each of the first and second annular bands of curler air outlets including a plurality of outlet ducts, the outlet ducts of the first annular band of curler air outlets generating a first Coanda air flow and the outlet ducts of the second annular band of curler air outlets generating a second Coanda air flow. 15. A hair curler as described in clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, the land portion having a first portion extending longitudinally outward from the first annular strip of the curler air outlet towards the second end of the hair curler and a second portion extending longitudinally inward from the second annular strip of the curler air outlet towards the air inlet, and wherein the first Coanda air flow rotates around the first portion of the land portion and the second Coanda air flow rotates around the second portion of the land portion. 16. The hair curler according to clause 1, wherein the air outlet includes a plurality of outlet ducts, at least some of the outlet ducts having an upstream expansion zone and a downstream contraction zone. 17. A hair curler as described in clause 1, wherein the air outlet includes a plurality of outlet ducts, at least some of the outlet ducts having a cross-sectional area in the direction of flow through the outlet port that is smaller than the cross-sectional area in the direction of flow through the respective inlet port. 18. The hair curler of clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion comprises metal. 19. A hair curler as described in clause 18, wherein the land portion is constructed of metal or metal-filled plastic, or has an inner or outer surface coated with metal. 20. A hair curler as described in clause 5, wherein a first set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a first side of the first annular strip of curler air outlet facing longitudinally inward towards the air inlet of the hair curler, and a second set of outlet ports of the outlet duct of the first annular strip of curler air outlet is provided on a second side of the first annular strip of curler air outlet facing longitudinally outward towards the second end of the hair curler. 21. The hair curler according to clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is smooth. 22. The hair curler of clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is textured. 23. A hair curler as described in clause 22, wherein the land portion has a recessed surface. 24. A hair curler as described in clause 22, wherein the land portion has ribs extending generally perpendicular to the direction of air exiting the exit port. 25. A hair curler as described in clause 22, wherein the outlet duct includes angularly spaced apart vanes and the land portion has ribs extending generally perpendicular to the vanes. 26. A hair curler as described in clause 1, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion has a unidirectional mechanical hair engagement member that engages the hair as it rotates around the land portion in a first direction and enables the hair to rotate around the land portion in a second direction opposite the first direction. 27. A hair curler as described in clause 1, which is removably attachable to a hair dryer. 28. The hair curler of clause 1, further comprising a heating element disposed inside the hair curler. 29. A hair curler as described in clause 5, wherein the land portion extends in a direction away from the first annular strip of the curler air outlet, and the land portion is impermeable to air. 30. The hair curler of clause 5, wherein the first annular band of the curler air outlet includes a raised ring extending about the longitudinal axis.

[0291] Clause Set I 1. A hair curler having an inlet end having an air inlet, a longitudinally spaced second end, a longitudinal axis, a curler outlet shaped to direct air flow along an outlet vector having a tangential component, and an air flow passage from the air inlet to the curler outlet, the curler outlet including an outlet duct extending from the air flow passage to the exterior, the outlet duct including an outlet end expansion zone. 2. The hair curler described in clause 1, comprising a first plurality of curler outlets spaced apart from a second plurality of curler outlets, and a land portion located between the first plurality of curler outlets and the second plurality of curler outlets. 3. A hair curler as described in clause 2, the land portion of which is airtight. 4. A hair curler as described in clause 1, wherein the curler outlet includes a set of outlet ducts, each outlet duct including an outlet end enlarged zone terminating in an outlet port, and the multiple outlet ports of the set are positioned at an angle around the longitudinal axis. 5. The hair curler according to clause 4, wherein the outlet end expansion zone is formed between the radially inner wall and the radially outer wall, and the spacing between the radially inner wall and the radially outer wall increases along the outlet end expansion zone. 6. A hair curler as described in clause 4, comprising a first plurality of curler outlets, a second plurality of curler outlets, a third plurality of curler outlets, a first land portion positioned between the first plurality of curler outlets and the second plurality of curler outlets, and a second land portion positioned between the second plurality of curler outlets and the third plurality of curler outlets. 7. A hair curler as described in clause 6, the land portion of which is airtight. 8. The hair curler of clause 1, wherein the curler outlet directs air at a generally angle along an outer surface of the hair curler, such that air exiting the curler outlet travels at a generally angle along the outer surface. 9. The hair curler of clause 1, wherein the outlet duct extends from the inlet port to the outlet port, the outlet port having a radially outer surface located radially outward of the adjacent land portion. 10. The hair curler of clause 9, wherein the air flow path includes a passageway within the air curler, and the inlet port is provided in a wall of the passageway. 11. The hair curler according to clause 1, wherein the cross-sectional air flow area of ​​the duct is greatest at the outlet end of the outlet end expansion zone. 12. A hair curler as described in clause 6, wherein the first plurality of curler outlets are the plurality of curler outlets closest to an inlet end of the hair curler, and the first plurality of curler outlets direct air along an outlet vector whose only longitudinal component is directed away from the inlet end. 13. The hair curler of clause 12, wherein the second plurality of curler outlets and the third plurality of curler outlets direct air along an outlet vector that includes a longitudinal component directed toward the inlet end. 14. The hair curler of claim 13, wherein the first land portion is bell-shaped along the longitudinal axis. 15. A hair curler as described in clause 6, wherein the first plurality of curler outlets are a plurality of curler outlets closest to an inlet end of the hair curler, the first plurality of curler outlets direct air along a first outlet vector, the second plurality of curler outlets direct air along a second outlet vector, and the third plurality of curler outlets direct air along a third outlet vector, the first outlet vector being smaller than at least one of the magnitude of the second outlet vector and the magnitude of the third outlet vector. 16. A hair curler as described in clause 15, wherein the magnitude of the second outlet vector is greater than the magnitude of the first outlet vector, and the magnitude of the third outlet vector is greater than the magnitude of the first outlet vector. 17. A hair curler as described in clause 16, wherein an exit duct of the second plurality of curler outlets has a minimum transverse air flow area greater than a minimum transverse air flow area of ​​an exit duct of the first plurality of curler outlets, and an exit duct of the third plurality of curler outlets has a minimum transverse air flow area greater than a minimum transverse air flow area of ​​an exit duct of the second plurality of curler outlets. 18. A hair curler as described in clause 1, wherein the air flow path includes a venturi and a number of air inlets leading from the exterior of the hair curler into the venturi, the number of air inlets opening from a position at the inlet end of the hair curler. 19. A hair curler as described in clause 18, wherein the venturi is upstream of any of the curler outlets. 20. A hair curler as described in clause 19, wherein the venturi is at an inlet end of the hair curler. [Explanation of symbols]

[0292] 100 Hair curling device 102 Carla Head 104 Main unit 110 Longitudinal axis 112 Head first end 114 Head 2nd end 120 Main body side wall 122 End Wall 124 diameter 130 Head air passage 132 Head Air 134 Head air outlet 134a Exit 136 Exit Port 137 angle 138 Duct 140 Inlet Port 141 Long dimension 142 Vane 143 Short dimension 143 Wall 144 Intermediate position 150 Carla Exit 150a Clockwise 150b Counterclockwise 150c Two-way Curla Exit 150d One-way Carla exit 150e 1st Carla Exit 150F 2nd Carla Exit 151 Carla Exit Set 151a 1st set at the exit of Carla 151b 2nd set of exits from Karla 151c 3rd set at the exit of Carla 152 Exit Vector 153 Longitudinal Row 154 Tangential component 160 Land section 160a Land section 160b Land section 170 Air passage 172 Passage Entrance 174 Passage exit 176 First end 178 Second end 180 Air moving parts 182 Blois 184 Joints 186 Fasteners 188 Exit opening 190 Electrical heating element 191 Heating elements 192 Handle 194 Hand grip part 196 Handle shaft 198 Rotational Axis 200 Built-in Energy Storage Device 202 Power cord 204 User Interface 206 Valve Toggle 208 Air outlet directional valve 212 Attachment 214 Nozzle 216 Reservoir 218 Pump 220 Closed part 222 Closure Longitudinal Segment 230 Longitudinal component 232 Tangential angle 236 Longitudinal angle 246 Annular Band 246a Side 246b Side 248 Height 250 Expansion Zone 252 Shrinking Zone 256 Raised Ring 260 Exterior Wall 262 Inner wall 270 Ridge 272 Hollow 274 Mechanical hair engaging member 276 1st direction 278 Second direction 280 Entrance End Segment 280a Carla Segment 280b Non-Carla Segment 281 Entrance End Segment 283 Carla Segment 285 Non-Carla Segment 290 Primary air flow passage 292 Secondary air flow passage 294 Secondary air outlet 300 bleed air inlet 301 Bleed valve 302 Bleed air outlet 310 Hollow 312 tube 340 Venturi 370 Infrared absorbing materials 380 Heated surface 382 Insulation Layer 322 Charging Station 320 Receiving side 324 Base 326 Cradle 328 Recess 330 parts 350 Manufacturing method 352 Master 353 Aperture 358 Ring 370 Infrared absorbing materials Section 1A Section 1B Section 2A 2B Section 3A Section Section 3B Section 4A 4B Section

Claims

1. an inlet end having an air inlet; a longitudinally spaced second end; A longitudinal axis; a plurality of axially spaced curler outlets; a land portion located between an adjacent curler outlet and an air flow passage from the air inlet to the curler outlet; A hair curler having

2. 2. The hair curler according to claim 1, wherein the air outlet has a radially outer surface located radially outward of the land portion at the location of the air outlet.

3. 2. The hair curler of claim 1, wherein said land portions are airtight.

4. the air outlet comprises a plurality of sets of air outlets; The hair curler of claim 1 , wherein each set of air outlets includes a plurality of air outlets positioned angularly about the longitudinal axis.

5. 5. The hair curler of claim 4, wherein the land portions are positioned between adjacent sets of air outlets.

6. the plurality of sets of air outlets includes a first set of air outlets, a second set of air outlets, and a third set of air outlets; 5. The hair curler of claim 4, wherein the land portion includes a first section positioned between the first set of air outlets and the second set of air outlets, and a second section positioned between the second set of air outlets and the third set of air outlets.

7. The hair curler of claim 6, wherein said land portions are air impermeable.

8. The hair curler of claim 1 , wherein the air outlets direct air along an outer surface of the hair curler, causing air exiting the air outlets to travel along the outer surface.

9. Each air outlet includes an outlet duct extending from an inlet port to an outlet port; The hair curler of claim 1 , wherein the exit port has a radially outer surface located radially outward of the land portion at the location of the exit port.

10. the air flow path includes a passage within the air curler, The hair curler of claim 9, wherein the inlet port is located within the passageway.

11. the passage has a radially outer wall; The hair curler of claim 10, wherein the inlet port has a radially inner side located radially inward of the radially outer wall.

12. The hair curler of claim 1 , wherein the air outlets direct air in a common direction.

13. some of the air outlets direct air in a clockwise direction; 2. The hair curler of claim 1, wherein the other air outlets direct air in a counterclockwise direction.

14. 14. The hair curler of claim 13, further comprising a valve operable to selectively direct air to the air outlet that directs air in a clockwise direction and to the air outlet that directs air in a counterclockwise direction.

15. the plurality of sets of air outlets includes a first set of air outlets and a second set of air outlets; the first set of air outlets directs air in a clockwise direction; The hair curler of claim 4 , wherein the second set of air outlets directs air in a counterclockwise direction.

16. 16. The hair curler of claim 15, further comprising a valve operable to selectively direct air to the air outlet that directs air in a clockwise direction and to the air outlet that directs air in a counterclockwise direction.

17. Each air outlet includes an outlet duct extending from an inlet port to an outlet port; 5. The hair curler according to claim 4, wherein the outlet ports of the first set of air outlets are axially aligned with the outlet ports of the second set of air outlets and with the outlet ports of the third set of air outlets.

18. Each air outlet includes an outlet duct extending from an inlet port to an outlet port; 5. The hair curler of claim 4, wherein the first, second and third sets of air outlets define a plurality of axially extending rows of outlet ports that are axially aligned.

19. Each air outlet includes an outlet duct extending from an inlet port to an outlet port; the first, second, and third sets of air outlets define a plurality of axially extending rows of outlet ports; The hair curler of claim 4 , wherein for each row of outlet ports, the outlet ports are positioned angularly about the longitudinal axis.

20. Each air outlet includes an outlet duct extending from an inlet port to an outlet port; the first, second, and third sets of air outlets define a plurality of axially extending rows of outlet ports; for each row of outlet ports, the outlet ports of the second set of outlet ports are positioned angularly about the longitudinal axis from the outlet ports of the first set of outlet ports; 5. The hair curler of claim 4, wherein the outlet ports of the third set of outlet ports are positioned angularly about the longitudinal axis from the outlet ports of the second set of outlet ports.

Images