Brush heads with recessed bristles, brushes, methods of making and using same - Patents.com

Abstract

The present invention recognizes that there exists a long-felt need for brush heads and brushes with material application and buffing properties. A first aspect of the present invention is a brush head. A second aspect of the present invention is a brush including the brush head of the present invention. A third aspect of the present invention is a method of manufacturing the brush head of the present invention. A fourth aspect of the present invention is a method of manufacturing the brush of the present invention. A fifth aspect of the present invention is a method of using the brush head of the present invention. A sixth aspect of the present invention is a method of using the brush of the present invention. A further aspect is a brush head having an outer bristle zone and a convex inner bristle zone.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation-in-part of U.S. Design Patent Application No. 14 / 447,974, entitled “Brush Head with Recessed Bristles, Brush, Method of Making and Method of Using Same,” filed July 31, 2014, which is a continuation-in-part of U.S. Design Patent Application No. 29 / 485,705, filed March 21, 2014. Additionally, this application is a continuation-in-part of U.S. Design Patent Application Serial No. 29 / 568,752, entitled "Brush Head Skirt," filed on June 21, 2016, which is a continuation-in-part of U.S. Design Patent Application Serial No. 14 / 447,974, entitled "Brush Head with Recessed Bristles, Brush, Method of Making and Method of Using Same," filed on July 31, 2014, which is a continuation-in-part of U.S. Design Patent Application Serial No. 29 / 485,705, entitled "Brush Head with Recessed Bristles," filed on March 21, 2014. The disclosures of each of these applications are incorporated herein by reference in their entirety. [Technical field]

[0002] The present invention relates generally to the field of brush heads, brushes, and methods of their manufacture and use. [Background technology]

[0003] A wide variety of brush heads and brushes are used for a variety of purposes, such as cleaning and applying materials to surfaces for industrial, hobby, artistic, and cosmetic purposes. Although the number and types of brushes vary, none have the characteristics of the brush heads and brushes of the present invention, which are brush heads and brushes having concave bristle portions. No brushes are known that have the physical characteristics and material application characteristics of the present invention.

[0004] For example, U.S. Patent No. D663,957S, issued to Garcia on July 24, 2012, describes a brush that has a clear gap in the center of the brush, apparently intended for use for hobby and fine art purposes. The central gap is apparently too small to accept a substance, and even if it could accept a substance, the brush's intention is clearly to smear or streak the material onto the surface for artistic effect when used to paint surfaces, for example, for craft or fine art projects such as cups, plates, figurines, and paintings on canvas.

[0005] A common problem with conventional brushes is that they do not apply makeup or other substances evenly, which can result in smearing, streaking, or an unnatural or undesirable look or appearance, particularly, but not limited to, in the application of makeup. However, the present invention is directed to preventing or reducing the occurrence of such smearing or streaking, but this need not be the case.

[0006] Additionally, another problem with conventional brushes is the difficulty in holding and applying solid materials, especially powdered cosmetics. U.S. Patent No. 1,120,476 issued to Hansen discloses a shaving brush having outer and inner bristles that provide an extension member and a powder retention member. In Hansen, the outer ends of the inner bristles are disposed in the same general plane as the extended ends of the outer bristles and are parallel to the extended ends of the outer bristles.

[0007] Other brushes provide only one tuft or bristle zone, such as U.S. Patent Application Publication No. 2009 / 0089949 to Mink et al., which provides a shaving brush with synthetic bristles arranged into tufts that have the look, texture, and feel of badger hair and further have antibacterial properties. Additionally, U.S. Patent No. 5,195,546 issued to Cansler discloses a cosmetic brush for applying powder made from synthetic bristles, the synthetic bristles having a gentle random and irregular wavy configuration along the length of the bristles.

[0008] Conventional brushes may not be able to easily pick up and hold solid or powdered materials, such as powdered cosmetics. As a result, the solid materials may fall off the brush head when transferring the solid materials to the surface, causing stains and hindering the application of the solid materials to the surface. Furthermore, conventional brushes, including cosmetic brushes, may not be adequately adapted to apply solid materials, such as powdered cosmetics, to a large surface area, such as a human neck or shoulder. As a result, complete application of the solid materials to the desired surface may take time, and the user may have to repeatedly collect the solid cosmetics on the brush and then apply the cosmetics to the surface to completely cover the surface. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention recognizes that there is a long-felt need for brush heads and brushes with material application and buffing properties. [Means for solving the problem]

[0010] A first aspect of the present invention is a brush head.

[0011] A second aspect of the invention is a brush comprising a brush head of the invention.

[0012] A third aspect of the invention is a method of manufacturing the brush head of the invention.

[0013] A fourth aspect of the present invention is a method for producing the brush of the present invention.

[0014] A fifth aspect of the invention is a method of using the brush head of the invention.

[0015] A sixth aspect of the present invention is a method of using the brush of the present invention.

[0016] A further aspect of the invention is a brush head for applying a solid material, comprising an outer bristle zone and an inner bristle zone defining a reservoir, the inner bristle zone having a convex configuration in longitudinal cross section and configured to hold a solid material such as a powdered cosmetic for application to a surface. The convex inner bristle zone is preferably rounded in longitudinal cross section and the inner bristle zone may have the shape of a dome.

[0017] The present invention further relates to a brushhead having an inner zone of convex configuration, the outer and / or inner bristle zones being outwardly tapered in longitudinal cross section, and further, the outer bristle zone may include a flat surface defined by the tips of the bristles in longitudinal cross section.

[0018] The present invention further relates to a brush head having an inner zone of convex configuration, the outer and / or inner bristle zones being generally circular when viewed in top plan.

[0019] The present invention relates to a brushhead having a convex inner bristle zone, the inner bristle zone having a packing density higher than that of the outer zones.

[0020] The present invention further relates to a brush head having a convex inner concave bristle zone, the brush head being preferably used for applying a solid cosmetic product, such as a powder cosmetic product, which may be considered to include a medicine, cosmeceutical, or similar topically applied material.

[0021] The present invention further relates to a system for applying a solid material to a surface using a brush head, the brush head comprising an outer bristle zone and an inner recessed bristle zone defining a reservoir, the inner bristle zone comprising a convex configuration in longitudinal cross section. The inner bristle zone may be rounded or have a dome shape in longitudinal cross section. The system for applying a solid material may further comprise a handle attached to the brush head, and / or a ferrule, ring, or crimp area for holding the bristles.

[0022] The present invention further relates to a method of using a brush head to apply cosmetic comprising providing a brush head having an outer bristle zone and an inner recessed bristle zone defining a reservoir, the inner recessed bristle zone having a convex configuration in longitudinal cross section, applying cosmetic to the brush head such that the cosmetic is retained by the brush head, and transferring the cosmetic to a surface. The cosmetic can be retained on or between the bristles of the brush head. The method can include forcing the brush head into the cosmetic to be transferred to the surface and / or causing the cosmetic to move in a circular or swirling motion such that the cosmetic can be picked up and retained by the brush.

[0023] The present invention further provides a method for manufacturing a brush and / or brush head, comprising providing bristles, arranging the bristles in an inner zone and an outer zone, and forming the bristles into a brush head of the present invention. The method may further comprise attaching the brush head to a handle and / or securing the bristles with a crimp region, ring, or ferrule.

[0024] The foregoing summary, as well as the following detailed description of preferred embodiments of the invention, will be better understood when considered in conjunction with the accompanying drawings. For the purpose of illustrating the invention, there are shown in the drawings embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 generally illustrates a right front perspective view of one embodiment of a brush head of the present invention having recessed bristles that can form a reservoir for a material to be applied to a surface, such as, but not limited to, a liquid cosmetic material to be applied to a human subject's face, showing the environment including the ferrule and handle. The overall brush can include a brush head (100), a ferrule (110), and a handle (120). The brush head can include an outer bristle zone (130) and an inner recessed bristle zone (140). [Diagram 2] FIG. 1 generally illustrates a right side view, with the left side, front, and back being mirror images, of one embodiment of a brush head of the present invention having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in FIG. [Diagram 3]3 generally illustrates a left, front, and rear view of one embodiment of a brush head of the present invention according to Fig. 2 having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in Fig. 1. [Figure 4] 1 generally illustrates a top view of one embodiment of a brush head of the present invention having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in FIG. [Diagram 5] 1 generally illustrates a bottom view of one embodiment of a brush head of the present invention having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in FIG. [Figure 6] FIG. 1 generally illustrates a right front perspective view (120) of one embodiment of a brush of the present invention that includes a brush head having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. The brush includes a brush head (100), a ferrule (110), and a handle (120). The brush head includes an outer bristle zone (130) and an inner recessed bristle zone (140). [Figure 7] FIG. 1 generally illustrates a right side view, with the left side, front, and back being mirror images, of one embodiment of a brush of the present invention including a brush head having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in FIG. [Figure 8]8 generally illustrates a left, front, and back view of one embodiment of a brush of the present invention according to FIG. 7 including a brush head having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to a human subject's face. Component numbering is as shown in FIG. [Figure 9] 1 generally illustrates a top view of one embodiment of a brush of the present invention including a brush head having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to the face of a human subject. Component numbers are as shown in FIG. [Figure 10] FIG. 1 generally illustrates a bottom view of one embodiment of a brush of the present invention including a brush head having recessed bristles that can form a reservoir for material to be applied to a surface, such as, but not limited to, liquid cosmetic material to be applied to the face of a human subject. Component numbers are as shown in FIG. [Figure 11] The preferred brushes of the present invention are generally shown, including a brush head with recessed bristles that can form a reservoir for a material to be applied to a surface, such as, but not limited to, a liquid cosmetic material to be applied to the face of a human subject, and show the following preferred dimensions: For example, the present invention is not limited to specific dimensions or ratios, 200 is about 16.5 mm, 210 is about 13.5 mm, 222 is about 45 mm, 230 is about 75 mm, and 240 is about 136.5 mm. The tolerances are generally between + / - about 0.1% to about 10%, preferably between about 0.5% to about 5%, and more preferably between about 1% to about 2%. The specific sizes and ratios can be adapted to a specific brush head or brush for a specific purpose and function. The brush head is shown with cross-hatched lines at different angles to highlight the difference between the outer bristle zone and the inner bristle zone to clearly show the dimensions. [Figure 12]FIG. 3 generally illustrates a front perspective view of an embodiment of a brush head having a convex inner bristle zone for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to the human face. The brush head (300) generally includes an outer bristle zone (330) and an inner concave bristle zone (340) having a convex curvature in longitudinal cross section. When configured as a brush, the brush includes a handle (320). [Figure 13] 1 generally illustrates a perspective cross-sectional view of an embodiment of a brush head having a convex inner bristle zone for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to the human face, with component numbers as presented in FIG. [Figure 14] 1 generally illustrates a side perspective view of an embodiment of a brush head having a convex inner bristle zone for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to the human face, with component numbers as presented in FIG. [Figure 15] 1 generally illustrates a longitudinal cross-sectional view of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to the human face, with component numbers as presented in FIG. [Figure 16] 1 generally illustrates a side view of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to a human face, with component numbers as presented in FIG. [Figure 17] 1 generally illustrates a top view of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to a human face, with component numbers as presented in FIG. [Figure 18]1 generally illustrates a bottom view of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying solid materials to a surface, such as, but not limited to, the application of powdered cosmetic products to the human face, with component numbers as presented in FIG. [Figure 19] FIG. 1 generally illustrates a longitudinal cross-section of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying a solid material to a surface. The bristles of the brush head (300) are fixed within a ring (310), with preferred dimensions as follows: the ring (310) has a length l1 of about 55.5 mm and a width w1 of about 28.7 mm, and the brush head has a length l3 of about 31 mm extending outward from the top of the ring, such that the total length l2 of the ring and brush head is about 86.5 mm. The tolerance is + / - 0.1% to about 10%, preferably about 0.5% to about 5%, and more preferably about 1% to about 2%. [Figure 20] In the figure, a longitudinal cross-section of an embodiment of a brush head with an inner bristle zone having a convex configuration for applying solid materials to a surface, such as but not limited to applying powdered cosmetics to a human face, is generally shown, the brush optionally including a weight, and preferred dimensions are shown as follows: For example, the invention is not limited to specific dimensions or ratios, the handle (320) has a length l4 of about 60 mm and a width w2 of about 30 mm, the brush head (330) has a length l5 of about 28 mm extending from the handle, and the highest point of the inner bristle zone is lower than the height of the outer bristle zone by a difference d1 of about 1.0 mm. The tolerance is + / - 0.1% to about 10%, preferably about 0.5% to about 5%, more preferably about 1% to about 2%. The specific size and ratio can be adapted to a particular brush head or brush for a particular purpose and function. [Figure 21]FIG. 5 generally illustrates a perspective view of an embodiment of a brush head having an inner bristle zone having a convex configuration for applying a solid material to a surface, such as, but not limited to, applying a powdered cosmetic to a human face, where the brush head is used to hold a solid cosmetic product (510) held or contained in a lid or container (500). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Where dashed lines are shown in the drawings, such dashed lines are for illustrative purposes only and represent one manner in which the present invention may be implemented, but are not necessarily so.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.Generally, the terminology used herein and the laboratory procedures for brush heads and brushes in general, for cosmetics, surface chemistry and surface modification, and other applicable technologies described below, are well known and commonly used in the art.When a term is presented in singular form, the inventor of the present invention also intends the plural form of the term, and when a term is presented in plural form, the inventor of the present invention also intends the singular form of the term.The terminology used herein and the laboratory procedures described below are well known and commonly used in the art, unless otherwise specified.When used throughout this disclosure, the following terms should be understood to have the following meanings, unless otherwise specified:

[0028] Wettability and wetting refer to the degree to which a liquid is absorbed into a surface. For example, dripping water onto a household sponge would tend to wet the sponge, whereas dripping water onto ordinary glass would tend not to wet the glass. Wettability or wetting may be terms of degree, not necessarily of absolute positive or negative outcome. The terms and concepts are well known in the art (see generally, e.g., "Wetting" at http: / / en.wikipedia.org / wiki / wetting, "Contact angle" at http: / / en.wikipedia.org / wiki / contact_angle, "Standard Practice for Surface Wetting of Coatings, Substrates, and Pigments by Modern Contact Angle Measurements" at http: / / www.astm.org / standards / d7334.htm, and "6) Wetting, Non-Wettability, and Contact Angle Hysteresis" at http: / / web.mit.edu.nnf / educationlwettability / wetting.html).

[0029] Contact angle measurement also refers to the degree to which a surface absorbs a substance. For example, when a hydrophilic liquid is applied to a hydrophobic surface, it will tend to bead on the surface and therefore have a relatively large contact angle. When the liquid is absorbed or spread on the surface, such as a drop of water applied to cellulose filter paper or household tissue or paper towel, or a drop of water on glass, a small or minimal contact angle will occur. Alternatively, a drop of water on the waxy surface of a leaf or the surface of a freshly waxed car will have a relatively large contact angle. This term and concept is well known in the art (see generally, e.g., "Wetting" at http: / / en.wikipedia.org / wiki / wetting, "Contact angle" at http: / / en.wikipedia.org / wiki / contact_angle, "Standard Practice for Surface Wetting of Coatings, Substrates, and Pigments by Modern Contact Angle Measurements" at http: / / www.astm.org / standards / d7334.htm, and "6) Wetting, Dewettability, and Contact Angle Hysteresis" at http: / / web.mit.edu.nnf / educationlwettability / wetting.html).

[0030] References herein to "one embodiment" or "embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the present disclosure. The use of the phrases "in one embodiment" or "in another embodiment" in various places herein do not necessarily all refer to the same embodiment, or to separate or alternative embodiments that are mutually exclusive with other embodiments. Furthermore, some embodiments may exhibit various features that are described, while other embodiments may not. Similarly, some features are described, but may be features in some embodiments and not in other embodiments.

[0031] The terms used in this specification generally have their ordinary meaning in the art in the context of this disclosure, within the specific context in which each term is used.Specific terms used to describe this disclosure are discussed below or elsewhere in this specification to provide further guidance to practitioners regarding the description of this disclosure.For convenience, certain terms may be highlighted, for example, using italics and / or quotation marks.The use of highlighting does not affect the scope and meaning of a term, and the scope and meaning of a term is the same in the same context, regardless of whether it is highlighted or not.It will be understood that the same thing can be stated in more than one way.

[0032] Therefore, alternative expressions and synonyms may be used for any one or more of the terms discussed herein. There is no particular importance to whether a term is detailed or discussed herein. Synonyms are provided for certain terms. Reference to one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification, such as examples of any term discussed herein, is for illustrative purposes only and is not intended to further limit the scope and meaning of the disclosure or the exemplified term. Similarly, this disclosure is not limited to the various embodiments provided herein.

[0033] Without intending to further limit the scope of the present disclosure, examples of devices, apparatus, methods, and their related results according to the embodiments of the present disclosure are given below. It should be noted that, for the convenience of the reader, headings or sub-headings may be used in the examples, but they do not limit the scope of the present disclosure in any way. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. In the case of conflict, the present document, including definitions, shall prevail.

[0034] It will be understood that terms such as "front", "rear", "upper", "lower", "side", "short", "long", "above", "below" and "below" as used herein are merely for ease of description and refer to the orientation of the components as shown in the drawings. It should be understood that any orientation of the components described herein is within the scope of the present invention.

[0035] Other technical terms used herein have their ordinary meaning in the art in which they are used, as exemplified by various technical dictionaries.

[0036] The present invention recognizes that there is a long-felt need for brush heads and brushes with material application and buffing properties.

[0037] By way of introduction to the breadth of the invention (but not by way of limitation), the invention includes several general and useful aspects, including the following.

[0038] 1)Brush head.

[0039] 2) A brush comprising a brush head of the present invention.

[0040] 3) A method for manufacturing the brush head of the present invention.

[0041] 4) A method for manufacturing the brush of the present invention.

[0042] 5) A method of using the brush head of the present invention.

[0043] 6) Method of using the brush of the present invention.

[0044] These aspects of the invention, as well as other aspects described herein, can be achieved by using the methods, products, and compositions described herein. It will be further recognized that various aspects of the invention can be combined to create desired embodiments of the invention in order to gain a full appreciation of the scope of the invention.

[0045] I. Brush head

[0046] A first aspect of the present invention is a brush head including a) an outer bristle zone and b) an inner recessed bristle zone.

[0047] As shown in Figures 1-11, which illustrate a preferred (but non-limiting) embodiment of the present invention, there is an outer bristle zone that results in an inner recessed bristle zone. The brush head of this embodiment of the present invention does not necessarily have to have this particular configuration.

[0048] By way of example, the outer zone need not necessarily be continuous, can have gaps, etc., and need not be of uniform thickness or height as a whole or relative to the inner zone. The surface of the outer zone defined by the bristles tips may be made up of bristles of different lengths, can form various types of patterns, such as wavy patterns, or can have random or random appearing bristle lengths that result in a "feathered" appearance by varying the bristle lengths in a particular pattern or random manner. The bristles may be in a substantially straight configuration along their entire length, or may be wavy along their entire length.

[0049] As an example, the inner zone also need not necessarily be continuous, can have gaps, etc., and need not be of uniform thickness or height as a whole or relative to the outer zone. The surface of the inner zone may be made up of bristles of different lengths, can form various types of patterns such as wavy, or can have random or random-looking bristles lengths to provide a "feathered" appearance.

[0050] Additionally, the outer and inner zones may be adjacent and not as separate as shown in the figures, for example the inner zone may be a concave configuration formed, for example from a flat top brush, using, for example, a hot wire to form an adjacent concave inner zone while forming the outer zone, the outer zone may be fairly wide or minimal.

[0051] The embodiments of Figures 12-21 also illustrate non-limiting embodiments of the invention having an outer bristle zone and a concave inner recessed bristle zone that defines a reservoir. By way of example, the inner and outer zones need not necessarily be continuous, may have gaps, etc., and need not be of generally uniform thickness or height. The surface of the outer zone defined by the tips of the bristles may be made up of bristles of different lengths, may form various types of patterns, such as flat or wavy patterns, or may have random or random appearing bristles lengths that result in a "feathered" appearance by varying the bristles' lengths in a particular pattern or random manner. Preferably, the bristles of the inner and outer zones are made up of the same type of material, such as, but not limited to, polybutylene terephthalate (PBT).

[0052] In another aspect of the invention, the brush head is a cosmetic brush head or a non-cosmetic brush head.

[0053] A preferred aspect of the present invention is a cosmetic applicator brush head whereby cosmetic is, in preferred embodiments, brought to an inner zone for application to a subject's surface and an outer zone preferably distributes the cosmetic over the subject's surface in a manner that reduces the occurrence of streaks and otherwise provides an overall more uniform and pleasing application of the cosmetic to the subject's surface.

[0054] In addition to cosmetic brush heads, the brush heads of the present invention can be used to apply other materials to other surfaces and for other purposes. As an example, the brush heads can be used to apply other pigmented materials, such as paints and inks, to surfaces. Industrial and artistic applications are part of the present invention.

[0055] Furthermore, the brush head of the present invention can also be used for cleaning.

[0056] In that case, a cleaning material, such as a cleaning solution, can be optionally applied to the brush head of the present invention and used for cleaning purposes, such as for dusting floors and other surfaces, or for washing surfaces, etc. It is also part of the present invention if no material is applied to the brush head.

[0057] Furthermore, the brush head of the present invention is applicable for application of medicines, drugs, or medications to a subject in medical applications. In this case, the applied material has a medicinal purpose and can include medicines, drugs, or medications. For example, the material can be used to treat other diseases such as acne, dermatitis, infections, immunological conditions such as poison ivy or psoriasis, or skin diseases, but not limited to these. Application of drugs, drugs, or medications to the skin has certain benefits in terms of focusing the treatment at the desired location, and also as an efficient route of administration for more systemic administration, especially when the skin is permeable or can be made permeable to the medicines, drugs, or medications. The formulation of the applied material and its correlation with the application and location of the disease, illness, or condition to be treated is at the discretion of the practitioner. Matching of medicines, drugs, or medications to diseases, illnesses, or conditions, and the specific formulations are widely known in the art and at the discretion of the practitioner in the field.

[0058] In a further aspect of the present invention, the brush head of the present invention is a cosmetic brush head.

[0059] A preferred aspect of the present invention is a cosmetic applicator brush head whereby cosmetic is, in preferred embodiments, brought to an inner zone for application to a subject's surface and an outer zone preferably distributes the cosmetic over the subject's surface in a manner that reduces the occurrence of streaks and otherwise provides an overall more uniform and pleasing application of the cosmetic to the subject's surface.

[0060] The cosmetic product may be of any type, including, but not limited to, liquid, solid, powder, aqueous, non-aqueous, emulsion, polar, non-polar, other cosmetic products known in the art, or combinations thereof.

[0061] In a further embodiment of the invention, the shapes of the outer and inner zones are the same or different.

[0062] As shown in the drawings, preferred embodiments of the invention are circular or substantially circular with respect to the inner and outer zones, but need not be so For example, the outer zone may be circular and the inner zone may be circular or polygonal, such as an octagon.

[0063] In another aspect of the invention, the shape of the outer zone, the inner zone, or a combination thereof is generally geometric, generally non-geometric, or a combination thereof.

[0064] Combinations of various geometric or non-geometric configurations are part of the present invention. As an example, the outer zone may be circular or kidney-shaped while the inner zone may be hexagonal or amoeba-shaped, with the same or different shapes being used, illustrating that geometric and non-geometric shapes are also part of the present invention.

[0065] In a further aspect of the invention, the shape of the inner zone, the inner zone, or a combination thereof is generally circular.

[0066] With respect to shape, the overall shape of the brush head when viewed in longitudinal cross section may be such that the surface defined by the tips of the bristles in the outer zone is flat as shown in the drawings, while the inner and outer zones may be the same or different shapes, such as beveled, chamfered, random, convex, concave, geometric, non-geometric, or combinations thereof, either individually or separately, depending on the embodiment and the desired end use of the brush head.

[0067] In the embodiment of Figures 12-21, the inner bristle zone has a convex configuration in longitudinal cross section, as best shown in Figures 13 and 15. This brush head with a convex configuration of the inner zone is particularly suitable for use in applying solid materials such as powdered cosmetics, such as free powders, compressed powders, blushes, and other similar cosmetics, in addition to other personal care materials such as powders, topical medicines, or cosmeceuticals, among others. In this embodiment, to provide a convex configuration of the inner zone having a rounded or dome shape, the bristles in the center of the inner zone have the greatest height or extend the furthest outward from the brush head, while the height of the bristles of the inner bristle zone, or the extent to which the bristles extend outward from the bottom of the brush head, gradually decreases with increasing distance from the center of the inner zone. Furthermore, the peak or highest point of the convex bristle inner zone is preferably equal to or less than the height of the outer bristle zone. In embodiments where the inner bristle zone is shorter in height than the outer bristle zone, the peak or highest point of the inner zone is preferably between about 1 mm and 6 mm below the tips of the bristles of the outer zone, however, in alternative embodiments, the peak of the inner zone may be elevated to the same height as the outer zone, or may be elevated to a height slightly higher than the height of the outer zone, such as 1 to about 12 mm above the height of the outer zone, so long as the brush head still achieves the desired properties described herein.

[0068] In the embodiment of the brush shown in FIG. 12, the inner zone can have a packing density less than, equal to, or greater than that of the outer bristle zone. Preferably, the inner zone has a packing density greater than the outer bristle zone, which improves the inner zone's ability to hold powdered cosmetic. Thus, the bristles of the inner zone are more densely packed and less flexible than the outer bristle zone, which can make the outer bristle zone more suitable for smoothing and buffing due to its flexibility. In one embodiment, the inner bristle zone weighs 19.3 grams, while the outer bristle zone weighs 5.7 grams. In such an embodiment where the inner and outer bristle zones are made of the same material, the inner bristle zone occupies a larger portion of the brush head than the outer bristle zone, and furthermore, the inner bristle zone is relatively denser than the outer bristle zone. In one embodiment, the inner bristle zone has approximately 60,795 bristles and the outer bristle zone has 17,955 bristles.

[0069] Additionally, the outer bristle zone has an outwardly tapered configuration when viewed in longitudinal section, as shown in Figures 15 and 16 and Figures 19-21, and can also have a flat configuration defined by the tips of the bristles of the outer zone. However, in alternative embodiments, the tips of the bristles of the outer zone are wavy or feathery, with random or random appearing bristles lengths. As shown in Figures 13 and 15, the convex inner bristle zone also preferably has an outwardly tapered configuration in longitudinal section. The outward taper results in a wider brush head that can cover a larger surface area, allowing for the rapid application of solid materials such as bronzer or highlighter to larger areas such as the human neck, collarbone, and / or shoulders.

[0070] When viewed in longitudinal cross section, the brush head can have other configurations, such as tapered outwardly in the figure, non-tapered, tapered inwardly, or other configurations, depending on the embodiment.

[0071] 17 and 18, brush heads having a convex inner zone preferably have a peripheral shape that is substantially circular in cross-section or plan view. The inner zone and / or the outer zone may have a circular configuration. However, in alternative embodiments, the inner and outer zones may have the same or different peripheral shapes.

[0072] Referring now to FIG. 19, an embodiment of a brush head having a convex inner bristle zone is shown, and a ring is shown that is used to hold the bristles. In some embodiments, the brush and / or brush head can include a ring 310 disposed around the circumference of the brush head at the lower end of the brush head to secure or maintain the bristles of the inner and outer zones in a desired configuration, as shown in FIG. 19. The ring 310 can have a variety of shapes and sizes, and is preferably a hollow tube with at least one open end in which the bristles are disposed as shown. The ring 310 can extend the length of the interior of the brush handle, or it can have a compact configuration and extend along only a portion of the length of the interior of the handle. The bristles are disposed in a central interior area defined by the ring 310, and the ring is tightly disposed around the bristles to apply tension to the bristles. In this manner, the ring can be used to hold the bristles in the desired configuration, and glue or other adhesive can be further used to maintain the bristles in the desired configuration. In alternative embodiments, a crimp area or ferrule is provided to hold the bristles in the desired configuration.

[0073] The embodiment as shown in FIG. 12 having a convex inner zone is particularly useful for applying solid cosmetics such as powder foundations, bronzers, and highlighters, among others. In some embodiments, the powder cosmetics used with the brush head can have a particle size of about 1 to about 100 microns, although the brush can be suitable for applying solid materials with a variety of particle sizes and size distributions. In operation, the user can press the brush head into a solid material such as a powder cosmetic held in or on a surface such as a container, lid, or compact. Preferably, the brush head is moved in a circular or swirling motion so that the powder cosmetic can be held on or within the brush head. By pressing the brush head into the powder cosmetic, the powder cosmetic is picked up between the bristles of the brush head and / or at the tips of the bristles, and some of the powder may settle in the gaps between the bristles. Specifically, it is believed that the powder cosmetic is held in / on the bristles of the inner zone. A convex inner zone allows the bristles of the inner zone to more easily contact the powder cosmetic held in a container, on a surface, or in a lid or dish when the powder cosmetic is applied to the brush, as compared to brush heads having flat or concave inner bristle zones. The outer zone surrounds the inner zone and preferably has a greater height that helps to retain the powder cosmetic in and / or on the inner bristle zone.

[0074] The powdered cosmetic is held on the brush head for application to the surface. The user can then contact the brush head containing the solid cosmetic to a surface, such as the user's skin, for application. The brush head can be pressed or rubbed against the user's skin, particularly in a circular, swirling, or sweeping motion, to transfer the solid cosmetic from the brush head to the user's skin. Again, the convex configuration promotes contact of the inner zone to the surface during application of the solid material. The outer bristle zone helps to retain the solid cosmetic in the inner zone and is used to smooth and / or buff the cosmetic transferred to the surface.

[0075] In an additional aspect of any of the various embodiments of the present invention, the bristles can be made of natural materials, synthetic materials, or a combination thereof.

[0076] The bristles can be made of any suitable material. Natural materials, including but not limited to animal products such as hair or plant materials such as fibers, are useful in the present invention. Synthetic materials, such as plastics, polymers, nylon, and other polymers or non-polymers are also useful in the present invention. In one embodiment, the bristles of the inner and / or outer zones are constructed of polybutylene terephthalate (PBT).

[0077] In another aspect of the invention, the outer bristle zone and the inner bristle zone are made of the same or different materials or combinations of materials.

[0078] Brush heads of the present invention can be made with all one type of bristles, or they can be made with two or more types of bristles, which can be mixed throughout or in different ratios in different areas of the brush head, which ratio can be anywhere from 0% to 100%.

[0079] In a further aspect of the embodiment of the invention shown in Figures 1-11, the inner bristle zone is more densely packed than the outer bristle zone, i.e., the inner bristle zone has more bristles per unit area. The inner bristle zone, at least a portion of which is lower in height than the outer bristle zone, allows the two zones to define a reservoir in which the cosmetic can be supported for application. The higher packing density of the inner bristle zone allows the cosmetic to be supported on or in the inner bristle zone so that it is maintained in the reservoir. The exact ratio of packing density of the inner zone to the outer zone may vary depending on the embodiment and the desired end use of the brush head. The outer bristle zone does not have as high a packing density as the inner zone, and this lower packing density allows for greater bristles movement or flexibility when applying the cosmetic. Thus, the difference in packing density allows the inner and outer zones to have different effects when applying the cosmetic.

[0080] In such embodiments, the inner bristle zone is preferably more densely packed, e.g., by having a greater number of bristles per unit area, compared to the outer bristle zone. The length of the bristles can affect the density of the bristles, as can the force on the brush head to hold it in place, such as with a crimper or ferrule. The packing density of the bristles themselves can be achieved during the manufacturing process by having more bristles in some areas of the brush head than others, but this need not be the case.

[0081] In another aspect of the invention, the brush head has an inner bristle zone that is less wetted than the outer bristle zone.

[0082] Wettability refers to the degree of absorption of liquid into surfaces such as the inner and outer zones of the brush head. Preferably, the inner zone has a lower wettability than the outer zone so that liquid material brought to the inner zone does not "bead up" or otherwise be absorbed by the bristles at this location and is therefore more available for application to the target at the application site.

[0083] Wettability, in some cases, is related to the physical properties of a surface and the liquid applied to the surface, and can be measured by contact angle measurement. In one example, a hydrophilic liquid, when applied to a hydrophobic surface, will bead up on the surface and therefore will have a relatively large contact angle compared to the contact angle of a hydrophilic liquid on a hydrophilic surface. In some cases, there is no contact angle when the liquid is absorbed into the surface, such as a drop of water applied to cellulose filter paper or household tissue or paper towel. Contact angle measurement is well known in the field of materials science, and materials and liquids can be selected so that the liquid will bead up on the surface or be absorbed into the surface.

[0084] In the present invention, the bristle density described herein is also believed to be related to the wettability of the brush head, such as the inner zone. Surfaces can also be coated or otherwise chemically modified to change the physical properties of the surface, such as hydrophobicity and hydrophilicity, and thus materials can be selected or modified to provide the desired wettability and / or beading properties for a particular liquid applied to a surface, such as the inner zone of the brush head of the present invention.

[0085] In one aspect of the brush head of the present invention, the inner zone has a lower wettability than the outer zone, such that liquids or other materials applied to the inner zone are not absorbed into that area of ​​the brush. The outer zone is preferably more wettable with respect to liquids or other materials applied to the inner zone.

[0086] In a further aspect of the invention, the inner bristle zone has a higher or lower contact angle with a liquid, an aqueous solution, a polar solution, a non-aqueous solution, a non-polar solution, an emulsion, or a combination thereof, than the outer bristle zone.

[0087] In a further aspect of the invention, the inner bristle zone is less wettable than the outer bristle zone or more wettable than the outer bristle zone with respect to an aqueous solution, a polar solution, a polar liquid, or a combination thereof.

[0088] In another aspect of the invention, the inner bristle zone is less wettable than the outer bristle zone with respect to non-aqueous solutions, non-polar solutions, or non-polar liquids, or combinations thereof.

[0089] In a further aspect of the invention, the inner bristle zone is less wettable with respect to the emulsion than the outer bristle zone.

[0090] In a further aspect of the invention, the outer bristle zone and the inner bristle zone cooperate to define a reservoir for a material, such as, but not limited to, a liquid material, such that when the material is applied to a surface, the inner bristle zone can essentially provide additional material for further application and sustained application of the material.

[0091] In another aspect of the invention, the inner bristle zone may be partially wettable with respect to a material, such as, but not limited to, a liquid material. This aspect of the invention is preferred when the inner bristle zone acts as a reservoir of material, where the material can "permeate" the inner bristle zone and still be available for application to a surface.

[0092] In another aspect of the invention, the outer zone has a higher buffability, a lower likelihood of streaking, or a combination thereof, as compared to the inner zone.

[0093] Thus, in a preferred embodiment of the invention, during operation, the inner zone effectively holds the material in place for application to a surface, and the outer zone functions to smooth or buff the application of the material to the surface for a desired effect, the preferred desired effect being reduced streaking or smearing of the material as it is applied to a surface, such as, but not limited to, liquid cosmetics being applied to a human subject.

[0094] However, in certain instances, such as for artistic purposes, where streaks or rubs have a desired effect, the present invention also includes such embodiments, such as for example, in hobby painting and other artistic expressions where imperfect blending, streaks, shading, fuzziness, etc. are more desirable than a smooth buffed appearance.

[0095] II. Brush

[0096] A second aspect of the invention relates to a brush comprising at least one brush head according to the invention.

[0097] As generally shown in the drawings, the brush heads of the present invention are preferably provided as brushes, each of which preferably includes, but is not limited to, at least one brush head, at least one handle, and optionally at least one crimp region, ring, or ferrule, and any combination thereof.

[0098] In a further embodiment of the invention, the brushes each comprise at least one handle.

[0099] The brush may include at least one handle, as generally shown in the drawings. Alternatively, the brush may include a handle with one or more brush heads. The handle may be made of any suitable material known in the art, including but not limited to wood, plastic, polymer, ceramic, glass, metal such as aluminum, or a combination of these materials. The handle may be solid or hollow, and may be of unitary construction or made of multiple pieces. The handle may be made using any suitable method based on the material, including but not limited to carving, molding, lathing, injection molding, casting, or a combination thereof. In some embodiments, the handle may further include a weight or weighted portion, preferably located at the bottom or lower end of the handle opposite the end of the handle where the brush head is located. The weight may serve to better balance or distribute the weight of the brush for ease and comfort of use. Additionally, the weight may be useful in allowing the brush to be kept in an upright position on a surface such as a countertop when not in use.

[0100] In a further embodiment of the invention, the brush may include at least one crimped region, ring, or ferrule.

[0101] As generally shown in the drawings, the brush may include a crimp region, ring, or ferrule. Generally, the crimp region or ferrule is used to hold the bristles of the brush head in a desired configuration. The crimp region or ferrule may also be used to attach the brush head to a handle. Alternatively, the crimp region, ring, or ferrule may be integrated into the brush, such as but not limited to being integrated into the handle, and may not be necessary depending on some aspects of the invention.

[0102] III. How the Brush Head is Manufactured

[0103] A third aspect of the present invention is a method of manufacturing a brush head according to the present invention comprising: a) providing bristles; and b) forming a brush head according to the present invention.

[0104] The brush head of the present invention can be fabricated using routine methods used in the art. For example, the bristles can be placed and formed into the brush head, either in their final form or in a form that is later modified. Preferably, but not necessarily, crimp zones, rings, or ferrules are provided to hold the bristles in the desired configuration.

[0105] If the bristles are initially formed in a manner other than their final form, the bristles can be cut to provide the final form, for example by trimming the brush head, by cutting with a cutting instrument such as a knife, razor or scissors, by cutting with a laser, by cutting with a hot wire or other instrument that uses heat or other forms of energy, by burning, by grinding, or by other methods known in the art.

[0106] In either case, the brush head can be rounded or otherwise treated to make the bristle ends less sharp or irritating to the skin. Any sharpening or rounding method known in the art can be used for this purpose.

[0107] IV. Brush Manufacturing Method

[0108] A fourth aspect of the invention is a method of making a brush of the invention, comprising providing bristles, arranging the bristles in an inner zone and an outer zone, forming a brush head of the invention, and attaching one of the brush heads of the invention to a handle.

[0109] Once the brush head is formed, it can be attached to a handle, such as by a crimped area, ring, or ferrule. Such methods of attaching a brush head to a handle are known in the art and are readily available and evident in the literature.

[0110] In some cases, a crimp zone, ring, or ferrule is present, but this need not be the case.

[0111] V. How to use the brush head

[0112] A fifth aspect of the present invention is a method of using a brush head of the present invention comprising: a) providing a surface to which the material is to be applied; b) providing a brush head of the present invention; c) applying the material to the brush head; and d) transferring the material from the brush head to the surface.

[0113] In another aspect of the invention, the surface is an object.

[0114] For certain purposes, such as cosmetic, pharmaceutical, or medical purposes, the surface is a subject. The subject may be any animal, including non-mammals, mammals, primates, and non-primates, as well as humans. Humans are preferred.

[0115] As described herein, the surface does not necessarily have to be an object, but can be any surface of any material that is desired to be brought to material. Brush heads are routinely used in painting, whether for professional purposes such as house or fence, recreational purposes such as hobby, or artistic purposes. In a particular application of the present invention, streak reduction and buffing are desired, and can be incorporated into artistic expression, such as painting, where various art tools are used. An interesting example is the use of the present invention in the imitation finishing of furniture, walls, and ceilings, where tools such as the tool of the present invention are required for the desired effect.

[0116] In a preferred embodiment of the invention, the surface is a human being, preferably the skin, more preferably an exposed surface that is visible to the human eye. In that case, the head, neck, shoulders and face are preferred for cosmetics, but not required to be, since certain cosmetics are used to hide certain defects due to pigmentation, scarring or other causes. When the subject is a human being, the human being may be male or female.

[0117] In a further embodiment of the invention, the material is a cosmetic.

[0118] A preferred embodiment of the present invention is one in which the material to be delivered to the object is a cosmetic product, as described herein. Notwithstanding the preferred embodiment of the present invention, the present invention is obviously applicable to other technologies.

[0119] In another embodiment of the invention, the material is a liquid cosmetic.

[0120] Other types of cosmetic products are also useful for application to a surface using the present invention, including powders, solids, packed powders, etc. Liquid refers to aqueous and non-aqueous liquids as described herein, and may be polar, non-polar, organic, non-organic, aqueous, non-aqueous, emulsions, water-in-oil emulsions, oil-in-water emulsions, or any combination thereof.

[0121] In a further aspect of the invention, the inner and outer bristle zones define a reservoir for a material, such as, but not limited to, a liquid material or a solid material, the solid material being preferably in the form of a powder. When the material is applied to a surface, the inner bristle zone can essentially provide additional material for further application and sustained application of the material. In an embodiment in which a liquid cosmetic is used, the liquid cosmetic can be applied to the brush and held in the reservoir for application to the surface. The liquid cosmetic is held in the reservoir and does not run down along the bristles to the bottom of the brush head or to a handle attached to the brush head. The liquid cosmetic can then be applied to the surface in a spill or drip.

[0122] In embodiments where powdered cosmetics are used, the powdered cosmetics are provided in a container, compact, or other packaging. An embodiment of a brush head having an inner bristle zone with a convex configuration can be inverted and pressed into the powdered cosmetics so that the brush head contacts the powdered cosmetics. The powdered cosmetics are held on the brush head, such as on the bristles of the inner zone or between the bristles of the inner zone, and the outer bristle zone helps to keep the powder in the inner zone. The brush head with the powdered cosmetics can be applied to a surface to transfer the cosmetics to the surface. Preferably, the brush head is pressed against the surface in a circular or sweeping motion, and the powdered cosmetics are released from the bristles and transferred to the surface. The outer and / or inner bristle zones can then be used to buff or smooth the cosmetics applied to the surface.

[0123] In another aspect of the invention, the inner bristle zone may be partially wettable with respect to a material, where the material is not limited to liquid materials. This aspect of the invention is preferred where the inner bristle zone acts as a reservoir of material, where the material can "permeate" the inner bristle zone and still be available for application to a surface.

[0124] VI. How to use the brush

[0125] A sixth aspect of the present invention is a method of using a brush of the present invention comprising: a) providing a surface to which the material is to be applied; b) providing a brush of the present invention; c) applying the material to the brush; and d) transferring the material from the brush head to the surface.

[0126] In another aspect of the invention, the surface is an object. In a further aspect of the invention, the surface is a human. In a further aspect of the invention, the material is a cosmetic. In another aspect of the invention, the material is a liquid cosmetic. In another aspect of the invention, the material is a powder-based cosmetic. In a further embodiment, the material is a pharmaceutical, cosmeceutical, or other material intended for topical application.

[0127] The brushes of the present invention can be used in the same or similar manner as the brush heads, as described above with respect to the method of use of the brush heads, which are incorporated herein by reference. EXAMPLES

[0128] Example 1: Technology Development

[0129] This example presents and elucidates the initial development of the technology, as well as a prototype brush head, brush, its manufacturing method, and its use. To evaluate the application of Bare Escentuals' cosmetic liquid product (BARESKIN® PURE BRIGHTENING SERUM FOUNDATION, item number / stock number 70723, having the general characteristics of viscous liquid, non-emulsion, specific gravity 1.13-1.20, viscosity 580-1,100 cp) to a human surface such as the face, a few drops of the liquid product are applied to a standard large brush head of Bare Escentuals made of polymer bristles (PBT - polybutylene terephthalate), and the liquid product on the brush head is then applied to a human face. This results in streaks of colored liquid product, liquid wetting or soaking into the brush head.

[0130] The brush head is trimmed to a shorter length in a "corner cut" style configuration and the liquid product is repeatedly applied to the surface, and it is found that the liquid product does not appreciably wet or soak into the brush head surface, but rather appears to form beads on the surface of the modified brush head.

[0131] An untrimmed brush head appears to have the ability to buff, a desirable characteristic for cosmetic applications. A brush head is fabricated with the general characteristics of the figure. A liquid product is applied to the central zone of the brush head and applied to a human surface with reduced or no noticeable or observable streaking of the applied liquid product. Without intending to be bound by any mechanism, it is believed that beading of liquid product on the surface of the inner zone enhances application of the liquid product to the application surface, and the outer zone buffs or polishes the applied liquid material to a smooth, relatively or substantially untreated finish.

[0132] Further refinements were made and further prototypes and preferred embodiments were developed, and the product shown in the figures is the result of such efforts.

[0133] Example 2: Preferred embodiments of the brush head and brush

[0134] This example illustrates and demonstrates preferred embodiments of the present invention as shown in the drawings.

[0135] A preferred brush head and brush for applying liquid materials such as liquid cosmetics is shown in the Figures. The preferred brush head and brush is Bare Escentuals' PERFECTING FACE BRUSH, item number / stock number 71184, with the general characteristics of PBT (Polybutylene Terephthalate) bristles (0.7 mm PTV WAVE (wavy / irregular shaped bristles)), anodized aluminum ferrules, and a wooden handle.

[0136] As shown in Figures 1 and 6, the brush can include a brush head (100), a ferrule (110), and a handle (120). The brush head can include an outer bristle zone (130) and an inner recessed bristle zone (140). Overall, Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 all show brush heads and brushes of the present invention, such as Bare Escentuals' PERFECTING FACE BRUSH, item number / stock number 71184, having the general characteristics of PBT (polybutylene terephthalate) bristles (0.7 mm PTV WAVE (wavy / irregular shaped bristles)), anodized aluminum ferrules, and a wooden handle. General dimensions are shown in Figure 11. Additionally, Figure 11 shows the preferred dimensions and preferred dimensional ratios in millimeters for the brush and brush head of the present invention. For example, the invention is not limited to specific dimensions or ratios, 200 is about 16.5 mm, 210 is about 13.5 mm, 222 is about 45 mm, 230 is about 75 mm, and 240 is about 136.5 mm. The tolerances are generally between about + / - 0.1% to about 10%, preferably between about 0.5% to about 5%, and more preferably between about 1% to about 2%. The specific sizes and ratios can be tailored to a particular brush head or brush for a particular purpose and function.

[0137] Example 3: Preferred Brush Head and Preferred Method of Making the Brush

[0138] This example illustrates and demonstrates a preferred embodiment of the present invention as shown in FIGS.

[0139] In general, the brush heads and brushes of the present invention are manufactured in a conventional manner known in the art: the bristles, in their unfinished configuration, are attached to a handle via a ferrule, and the bristles are then shaped into the desired configuration by trimming.

[0140] As shown in Figures 1 and 6, the brush can include a brush head (100), a ferrule (110), and a handle (120). The brush head includes an outer bristle zone (130) and an inner recessed bristle zone (140). Overall, Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 all show preferred brush heads and brushes of the present invention for applying liquid cosmetic products to a surface.

[0141] Example 4: Preferred Brush Head and Preferred Method of Use of Brush

[0142] This example illustrates and demonstrates preferred embodiments of the present invention as shown in the drawings.

[0143] A user grasps the handle of a brush, such as Bare Escentuals' PERFECTING FACE BRUSH, item number / stock number 71184, and applies the cosmetic to the inner zone. In a preferred embodiment of the present invention, a few drops of a liquid cosmetic material, such as BARESKIN® PURE BRIGHTENING SERUM FOUNDATION, item number / stock number 70723, are used. The user then optionally dabs or dots the cosmetic from the inner zone of the brush head onto a surface, such as the skin of the user or another subject. The cosmetic can be applied to the surface in any desired pattern or amount to achieve the desired results. In this manner, the cosmetic is applied to the surface. The brush is used to buff the cosmetic for a streak-free, consistent, "clean" application as desired. Optionally, the cosmetic is simultaneously buffed onto the subject, rather than dabbed or dotted onto the subject, also to achieve the desired results.

[0144] As shown in Figures 1 and 6, the brush can include a brush head (100), a ferrule (110), and a handle (120). The brush head includes an outer bristle zone (130) and an inner recessed bristle zone (140). Overall, Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 all show preferred brush heads and brushes of the present invention for applying liquid cosmetic products to a surface.

[0145] General dimensions are shown in FIG. 11. Additionally, FIG. 11 shows preferred dimensions and preferred dimensional ratios in mm for particularly preferred brushes and brush heads of the present invention. For example, the present invention is not limited to specific dimensions or ratios, such as 200 is about 16.5 mm, 210 is about 13.5 mm, 222 is about 45 mm, 230 is about 75 mm, and 240 is about 136.5 mm. The tolerances are generally between + / - about 0.1% and about 10%, preferably between about 0.5% and about 5%, and more preferably between about 1% and about 2%. Specific sizes and ratios can be tailored to specific brush heads or brushes for specific purposes and functions.

[0146] The user may also optionally apply the cosmetic to the outer zones as desired to obtain the desired results under circumstances that dictate deviations from the preferred use as indicated. An entire surface, such as a human face, may be treated, or only a portion thereof.

[0147] This process generally distributes makeup such as liquid foundation evenly, removes excess product, and results in a texture and appearance that more closely resembles skin than using other brushes or methods.

[0148] In a preferred embodiment of the present invention, the user drops the liquid foundation product onto the recessed bristles area that has the characteristics of applying and buffing the material. This "loaded" brush is then applied in a dotting motion to various areas of the face to distribute the product onto the face. The user then rubs the dots with the brush to distribute the product evenly across the face or smaller areas as desired. Preferably, the user does not need to apply product anywhere other than the brush and face at any one time. For example, the user's fingers and hands can preferably be kept clean and free or substantially free of product throughout the entire time the brush is in use. This embodiment of the present invention has certain advantages, including but not limited to, no transfer or transfer of material onto other surfaces or objects, such as clothing and furniture.

[0149] In a further preferred embodiment of the present invention, the inner bristle zone forms a reservoir for material, such as, but not limited to, a liquid material, such that when the material is applied to a surface, the inner bristle zone can essentially provide additional material for further application and sustained application of the material.

[0150] In another preferred aspect of the invention, the inner bristle zone may be partially wettable with respect to a material, such as, but not limited to, a liquid material. This aspect of the invention is preferred when the inner bristle zone acts as a reservoir of material, where the material can "permeate" the inner bristle zone and still be available for application to a surface.

[0151] Example 5: Preferred Brush Head and Brush

[0152] A preferred brush head and brush for applying solid cosmetics, such as powder cosmetics, is shown in the embodiment of Figures 12-21. The preferred brush head and brush is the BEAUTIFUL FINISH brush from Bare Escentuals, which has the general characteristics of wavy synthetic fibers, such as polybutylene terephthalate (PBT) bristles having a diameter of 0.07 mm, an anodized aluminum handle, and an aluminum ring that secures and holds the bristles in place. In a preferred embodiment, the brush further includes a small weight (380) located inside the handle at the bottom end of the handle opposite the brush head.

[0153] The general dimensions of a preferred embodiment of the brush are shown in Figures 19 and 20. Additionally, Figures 19 and 20 show the preferred dimensions and preferred dimensional ratios in millimeters of a preferred brush and brush head for applying the solid materials of the present invention. For example, and without the present invention being limited to any particular dimensions or ratios, the handle (320) has a length l4 of about 60 mm and a width w2 of about 30 mm. Thus, the ratio of the handle length to the handle width may be between about 4:1 and 1:1, and in a preferred embodiment is 2:1. The handle (320) is preferably of generally cylindrical construction. The ring (310) preferably has a length l1 of about 55.5 mm and a width w1 of about 28.7 mm so that the ring fits snugly within the handle, and the brush head has a length l3 of about 31 mm extending from the ring such that the overall length l2 of the ring and brush head is about 86.5 mm. The outer bristle zone (330) has a length l5 of about 28 mm extending from the handle such that the overall length l6 of the brush, including handle and brush head, is about 88 mm. The highest point of the inner zone (340) is lower than the outer bristle zone by a difference d1 of about 1.0 mm. The tolerance is + / - 0.1% to about 10%, preferably about 0.5% to about 5%, more preferably about 1% to about 2%. The particular size and ratio can be tailored to a particular brush head or brush for a particular purpose and function.

[0154] Example 6: Method of using the brush head and brush

[0155] This example demonstrates and demonstrates a preferred embodiment of the present invention as shown in Figures 12-21. Figure 21 shows an embodiment of a brush used in combination with a solid cosmetic product (510), which is used to transfer the solid cosmetic product contained and stored within a container (500) to a surface.

[0156] In use, a user grasps the handle of the brush, such as Bare Escentuals' BEAUTIFUL FINISH brush, inverts the brush, and places the brush head into a container or lid that has a solid material, such as Bare Escentuals' ORIGINAL Foundation Broad Spectrum SPF 15, which provides a circular lid into which solid foundation is placed. The user can apply downward pressure to engage the brush head, particularly the convex inner zone of the brush head, with the solid material, and move the brush in a circular or swirling motion to allow the solid cosmetic to be picked up and held by the brush head, where the cosmetic is held on and / or within the inner bristle zone, and the outer bristle zone helps to hold the cosmetic within the brush head. The user can then displace the solid material by placing the brush head in contact with a surface, such as human skin, and the user can apply slight pressure to move the brush in a circular or brushing motion to apply the material to the surface, where the wide brush head allows the brush head to quickly cover a large area and deposit a large amount of product on the surface. The brush head, and particularly the outer zone of the brush head, can then be used to buff and smooth the cosmetic product onto the surface, providing fast, even and controlled coverage of the surface.

[0157] All publications, including patents and scientific papers, mentioned in this application and in the reference list and attachments are incorporated by reference in their entirety for all purposes to the same extent as if each individual publication was individually incorporated by reference.

[0158] All headings are for the convenience of the reader and should not be used to limit the meaning of the text that follows the heading, unless specifically so specified.

[0159] Those skilled in the art will appreciate that modifications could be made to the above-described embodiments without departing from the broad inventive concept thereof, and it is therefore intended that this invention not be limited to the particular embodiments disclosed, but that it will cover modifications within the spirit and scope of the invention as defined by the appended claims.

Claims

1. 1. A system for applying cosmetic products, comprising: a brush head for applying a solid material having bristles, the brush head having an outer bristle zone and an inner recessed bristle zone defining a reservoir; an annular ring disposed around the circumference of the brush head at the lower end of the brush head for securing the bristles; a handle having a base, the inner recessed bristle zone is convex in longitudinal cross section, the inner recessed bristle zone is configured to hold a solid material for application to a surface, the highest point of the convex center of the inner recessed bristle zone is at a height from 6 mm below a maximum height of the outer bristle zone to 12 mm above a maximum height of the outer bristle zone, the inner recessed bristle zone having a packing density higher than a packing density of the outer bristle zone, the annular ring is disposed within the handle and engages the handle face-to-face, the brush head extends outwardly from one end of the handle and the annular ring, the annular ring extends into the handle and has a length that is less than a length of the handle; The other end of the annular ring reaches the bottom of the handle.

2. The system of claim 1 , wherein the inner recessed bristle zone is rounded in longitudinal cross section.

3. The system of claim 1 , wherein the outer bristle zone has a flat surface defined by bristles tips.

4. The system of claim 1 , wherein the outer bristle zone comprises an outwardly tapered configuration.

5. The system of claim 1 , wherein a peripheral shape of the outer bristle zone in cross section is generally circular.

6. The system of claim 5 , wherein a peripheral shape of the inner recessed bristle zone in cross section is generally circular.

7. The system of claim 1 , wherein a highest point of the inner recessed bristle zone is below a height of the outer bristle zone.

8. The system of claim 1 , wherein the solid material is a cosmetic powder.

9. The system of claim 1 , wherein the solid material is a pharmaceutical.

10. 10. The system of claim 1, further comprising a weight located at a lower end of the handle opposite the end of the handle from which the brush head extends.

11. 1. A method of manufacturing a brush, comprising the steps of: Preparing the bristles; disposing the bristles into an inner recess bristle zone and an outer bristle zone; forming a brush head comprising an outer bristle zone and an inner recessed bristle zone defining a reservoir, the inner recessed bristle zone being convex in longitudinal cross section, the highest point of the central convexity of the inner recessed bristle zone being at a height from 6 mm below a maximum height of the outer bristle zone to 12 mm above a maximum height of the outer bristle zone, the inner recessed bristle zone comprising a packing density greater than a packing density of the outer bristle zone; securing the bristles to one end of an annular ring disposed around a circumference of the brush head at a lower end of the brush head; attaching the brush head to a handle whereby the annular ring fits within the handle in face-to-face engagement with the handle, the annular ring having a length less than a length of the handle, and the other end of the annular ring reaching a bottom of the handle.

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