Closure system for footwear, method of assembling a closure system for footwear, and closure mechanism for footwear

Abstract

A closure system for footwear includes a closure mechanism, a fastening element, and a cord or lace configured to operably engage an upper portion of the footwear, the closure mechanism configured to actuate to adjust the footwear from a loose configuration to a tightened configuration, and the fastening element configured to engage the closure mechanism to releasably secure the closure mechanism to the footwear.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE This disclosure relates generally to footwear that includes a fastening or closure system. [Background technology]

[0002] Many conventional shoes and other footwear generally include an upper and a sole attached to the lower end of the upper. Conventional shoes further include an interior space, i.e., a gap or cavity, formed by the upper and the inner surface of the sole to accommodate the user's foot before the shoe is secured to the foot. The sole is attached to the underside or boundary of the upper and is disposed between the upper and the ground. As a result, the sole typically provides stability and cushioning to the user while wearing the shoe. In some cases, the sole may include multiple components, such as an outsole, a midsole, and an insole. The outsole may provide traction to the bottom surface of the sole, and the midsole may be attached to the inner surface of the outsole and provide cushioning or additional stability to the sole. For example, the sole may include foam or foam-like materials that can increase stability at one or more desired locations along the sole, and can reduce stress and impact energy on the feet and legs when the user is running, walking, or performing other activities.

[0003] The upper generally extends upward from the sole and defines an interior cavity that completely or partially encases the foot. In most cases, the upper extends across the instep and toe regions and across the medial and lateral sides thereof. Many footwear items may include a tongue that extends across the instep region and fills the gap between the medial and lateral edges of the upper that define an opening to the cavity. The tongue may be located below the lacing system and between the medial and lateral sides of the upper to allow the shoe to be adjusted for tightness. The tongue may also be operable by a user to allow the foot to move in and out of the interior space or cavity. Additionally, the lacing system may allow a user to adjust certain dimensions of the upper or sole, thereby allowing the upper to fit a variety of foot types having different sizes and shapes.

[0004] The upper may be constructed of a wide variety of materials selected based on one or more uses of the shoe. The upper may also include portions that include various materials specific to particular regions of the upper. For example, it may be desirable to add stability to the front or adjacent heel regions of the upper to provide greater resistance or stiffness. In contrast, other portions of the shoe may include soft woven fabrics to provide stretch resistance, flexibility, breathability, or moisture wicking properties. Summary of the Invention [Problem to be solved by the invention]

[0005] However, in many cases, footwear with improved closure mechanisms, such as increased comfort or better fitting uppers, are desired. [Means for solving the problem]

[0006] The footwear described herein may have a variety of constructions. The footwear may have an upper and a sole structure connected to the upper.

[0007] In one aspect, a closure system for footwear includes a closure mechanism, a fastening element, and a lace configured to operably engage an upper of the footwear. The fastening element is configured to engage the footwear and the closure mechanism to releasably secure the fastening element to the footwear. The closure mechanism is configured to be rotated relative to the fastening element to adjust the footwear between a relaxed configuration and a tightened configuration. The lace is configured to engage the closure mechanism.

[0008] In some embodiments, the closure mechanism includes a collector spool having at least one attachment tip protruding therefrom, and the spool housing includes a notch configured to receive the at least one attachment tip. In some embodiments, the laces pass through a plurality of lace holes formed on the upper and through at least one tube formed on the collector spool. In some embodiments, the fastening element is attached to a tongue of the footwear. In some embodiments, the fastening element further comprises a hook configured to engage the tongue of the footwear. In some embodiments, the spool housing defines an interior volume, and the collector spool is configured to be entirely contained within the interior volume.

[0009] In some embodiments, a closure system for footwear includes a closure mechanism, a fastening element, and a lace configured to operably engage an upper of the footwear. The closure mechanism is configured to be actuated to adjust from a loose configuration to a tightened configuration. The fastening element includes a first spool and a second spool. The first spool defines a first axis of rotation and the second spool defines a second axis of rotation disposed orthogonally to the first axis of rotation. The first spool is configured to releasably engage the second spool, and the first spool is configured to rotate about the first axis of rotation and the second axis of rotation.

[0010] In some embodiments, the second spool includes an upper portion, a shaft, and a lower portion. The upper portion is configured to rotate relative to the lower portion. In some embodiments, the upper portion includes a plurality of protrusions, and the head cap is removably attached to the plurality of protrusions. In some embodiments, the first spool includes a shaft disposed between a first flange and a second flange, and the shaft includes at least one opening for receiving a lace. In some embodiments, the fastening element includes a hinged mechanism for removably attaching the closure mechanism to the footwear. In some embodiments, the first flange and the second flange are configured to rotatably engage with the spool base. In some embodiments, the closure mechanism is removably attached to the fastening element. In some embodiments, the lower portion of the closure mechanism includes a hook configured to be removably attached to a tongue of the footwear. In some embodiments, the fastening element is a U-shaped member defining a tube through which at least one lace passes.

[0011] In yet another aspect, a method of assembling a closure system for footwear includes providing a closure mechanism including at least one spool including at least one tab and a shaft with an opening. The method further includes providing a fastening mechanism configured to releasably secure the closure mechanism to the footwear, and providing a lace that engages the closure mechanism, the lace coupling with the shaft. The spool is rotated in a first direction to adjust the footwear to a tightened configuration, and the spool is rotated in a second direction to adjust the footwear to a loosened configuration.

[0012] In some embodiments, the first direction is opposite to the second direction.In some embodiments, the securing mechanism is disposed in an upper of the footwear.

[0013] Other aspects of the footwear, including its features and advantages, will be apparent to one of ordinary skill in the art upon review of the drawings and detailed description herein, and all such aspects of the footwear are intended to be included in the detailed description and this summary. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a bottom, medial perspective view of a piece of footwear configured as a right shoe including an upper and a sole structure according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a top view of the footwear of FIG. [Diagram 3] FIG. 3 is a plan view of the footwear of FIG. 1 with the upper removed and the skeletal structure of a user's foot superimposed thereon. [Figure 4] FIG. 4 is a schematic diagram of a lateral perspective view of footwear configured as a left shoe according to another embodiment of the present disclosure. [Diagram 5] FIG. 5 is a schematic diagram of a perspective view of the upper side of a fixing element. [Figure 6] FIG. 6 is a schematic exploded view of one embodiment of a closure mechanism. [Figure 7] FIG. 7 is a schematic diagram of a lateral perspective view of footwear configured as a left shoe according to another embodiment of the present disclosure. [Figure 8] FIG. 8 is a schematic exploded view of another embodiment of a closure mechanism. [Figure 9] FIG. 9 is a schematic diagram of a perspective lateral view of footwear configured as a left shoe and having a closure system according to yet another embodiment of the present disclosure. [Figure 10] FIG. 10 is a perspective view of a shoe upper having a closure system. [Figure 11] FIG. 11 is a pre-assembled state or configuration of one embodiment of a closure mechanism. [Figure 12] FIG. 12 illustrates an embodiment of a closure mechanism in a pre-assembled state or configuration and an embodiment of a closure mechanism in an assembled state or configuration. [Figure 13] FIG. 13 is a perspective view of one embodiment of a closure mechanism. [Figure 14] FIG. 14 is a perspective view of another embodiment of a closure mechanism. [Figure 15] FIG. 15 is a schematic diagram of a perspective lateral view of footwear configured as a right shoe having a closure system. [Figure 16] FIG. 16 is a schematic exploded view of a closure mechanism configured to be removably attached to an upper. [Figure 17] FIG. 17 is a side view of the closure system. [Figure 18] FIG. 18 is a perspective view of another embodiment of the lower portion of the closure system. [Figure 19] FIG. 19 is a schematic diagram of a perspective view of the outside of a piece of footwear having a closure system. [Figure 20] FIG. 20 is a schematic exploded view of a closure mechanism configured to be removably attached to an upper. [Figure 21] FIG. 21 is a top view of the bottom housing of the closure mechanism. [Figure 22] FIG. 22 is a front view of footwear having a closure system. [Diagram 23] FIG. 23 is a schematic diagram of a perspective view of the lateral side of a piece of footwear having a closure system according to another embodiment of the present disclosure. [Figure 24] FIG. 24 is a perspective view of one embodiment of a closure system. [Diagram 25] FIG. 25 is a perspective view of one embodiment of a fixation element. [Figure 26] FIG. 26 is a perspective view of a fastening element attached to an upper. [Figure 27] FIG. 27 is an exploded view of the closure system. [Figure 28] FIG. 28 is a perspective view of another embodiment of a head cap of a closure mechanism. [Figure 29] FIG. 29 is a perspective view of another embodiment of a head cap of a closure mechanism. [Diagram 30] FIG. 30 is a schematic diagram showing a perspective view of the outside of a piece of footwear having a closure system. [Diagram 31]FIG. 31 is a perspective view of the closure mechanism in a first position. [Diagram 32] FIG. 32 is a perspective view of the closure mechanism in a second position. [Diagram 33] FIG. 33 is a perspective view of the closure mechanism in a third position. [Diagram 34] FIG. 34 is a perspective view of one embodiment of a closure system. [Diagram 35] FIG. 35 is a perspective view of another embodiment of a head cap for a closure mechanism. [Diagram 36] FIG. 36 is a schematic diagram of the lateral side of a piece of footwear having a closure system operably attached to the tongue of an upper. [Figure 37] FIG. 37 is a schematic diagram of the lateral side of a piece of footwear having a closure system operably attached to the tongue of an upper. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of and priority to U.S. Provisional Application No. 63 / 418,686, filed October 24, 2022, and U.S. Provisional Application No. 63 / 295,984, filed January 3, 2022, each of which is incorporated by reference in its entirety.

[0016] References Regarding Federally Sponsored Research or Development Not applicable

[0017] Sequence Listing Not applicable

[0018] The following description and accompanying figures disclose various embodiments or configurations of shoes and sole structures. Although the embodiments of the shoes or sole structures are disclosed with reference to sports shoes, such as running shoes, tennis shoes, basketball shoes, etc., the concepts related to the embodiments of the shoes or sole structures may be applied to a wide range of footwear and footwear styles, such as, for example, cross-training shoes, football shoes, golf shoes, hiking shoes, hiking boots, ski and snowboard boots, soccer shoes and cleats, walking shoes, and track cleats. The concepts of the shoes or sole structures may also be applied to footwear considered non-athletic, such as dress shoes, sandals, loafers, slippers, heels, etc. In addition to footwear, certain concepts described herein may be applied to and incorporated into other types of apparel and athletic equipment, including helmets, padding, protective padding, shin guards, and gloves. Furthermore, certain concepts described herein may be incorporated into cushions, backpack straps, golf clubs, or other consumer or industrial products. Thus, the concepts described herein may be utilized in a variety of products.

[0019] The term "about" as used herein refers to variations in numerical values ​​that may arise due, for example, to typical measuring and manufacturing procedures used in footwear or other articles of manufacture that may include embodiments disclosed herein, inadvertent errors in these procedures, differences in manufacture, source, or purity of ingredients used in making a composition or mixture or carrying out a method, etc. Throughout the disclosure, the terms "about" and "approximately" refer to values ​​within ±5% of the numerical value that the term precedes.

[0020] The present disclosure relates to footwear and / or specific components of footwear, such as an upper and / or a sole or sole structure. The upper may comprise a knitted material, a woven material, and / or a nonwoven material. A knitted material may be made by knitting yarns, a woven material may be made by weaving yarns, and a nonwoven material may be made by producing a monolithic nonwoven web. Knitted materials include fabrics formed by warp knitting, weft knitting, flat knitting, circular knitting, and / or other suitable knitting operations. Knitted fabrics may have, for example, flat knit constructions, mesh knit constructions, and / or ribbed knit constructions, and the like. Woven fabrics include fabrics formed by any of a number of weaves, such as, but not limited to, plain weave, twill weave, satin weave, dobbin weave, jacquard weave, double weave, and / or double cloth weave. Nonwoven fabrics include, for example, fabrics made by airlaid and / or spunlaid processes. The upper may be composed of different materials, such as the first threads, the second threads, and / or the third threads, have different properties, or have different visual characteristics.

[0021] 1-3 illustrate an exemplary embodiment of footwear 100 including an upper 102 and a sole structure 104. Upper 102 is attached to sole structure 104, which together define a void or volume 106 (see FIGS. 2 and 3) into which a foot may be inserted. For reference, footwear 100 defines a forefoot region 108, a midfoot region 110, and a heel region 112 (see FIGS. 2 and 3). Forefoot region 108 generally corresponds to the portion of footwear 100 that encases the toes, the ball of the foot, and portions of the joints connecting the metatarsals and the toes or phalanges. Midfoot region 110 is closely adjacent to forefoot region 108 and generally corresponds to the portion of footwear 100 that encases the arch along the foot's trajectory. Heel region 112 is closely adjacent to midfoot region 110 and generally corresponds to that portion of footwear 100 that wraps around the rear of the foot, including the heel or calcaneus, ankle, and / or Achilles tendon.

[0022] Many conventional uppers are formed from multiple elements, such as textiles, polymer foams, polymer sheets, leathers, and synthetic leathers, bonded together by glue or stitching at seams. In some embodiments, the upper 102 of the footwear 100 is formed from a knit construction or knit component. In various embodiments, the knit component may incorporate different types of yarns that impart different properties to the upper. For example, one region of the upper 102 may be formed from a first type of yarn that imparts a first set of properties, and another region of the upper 102 may be formed from a second type of yarn that imparts a second set of properties. Using this construction, the properties of the upper 102 may be varied throughout the upper 102 by selecting specific yarns for different regions of the upper 102.

[0023] With reference to the materials comprising the upper 102, the specific properties that a particular type of yarn is intended to impart to the knitted component region will depend at least in part on the materials forming the various filaments and fibers of the yarn. For example, cotton may provide a softening effect, biodegradability, or natural aesthetics to the knitted material. Elastane and stretchy polyester may each provide the knitted component with the desired elasticity or recovery. Rayon may provide a high shine and moisture wicking material, wool may provide a material with increased moisture wicking properties, nylon may be an abrasion resistant durable material, and polyester may provide a hydrophobic durable material.

[0024] Other aspects of the knit component may be varied to affect the characteristics of the knit component and to provide desired properties. For example, the yarns forming the knit component may include monofilament line yarns or multifilament yarns. The knit component may also be formed using a particular knitting process to impart regions of the knit component with particular properties. Thus, both the materials forming the yarns and other aspects of the yarns may be selected to impart various properties to particular regions of the upper 102.

[0025] In some embodiments, the elasticity of the knit structure may be measured based on, first, comparing the width or length of the knit structure in an unstretched state and in an elongated state after the knit structure has had a force applied laterally to the knit structure in the width or length of the knit structure. In further embodiments, the upper 102 may also include additional structural elements. For example, in some embodiments, a heel plate or cover (not shown) may be provided in the heel region 112 to provide a transparent support to the heel of the user. In some embodiments, other elements, such as plastic materials, logos, trademarks, etc., may be applied and secured to the exterior surface using glue or a thermoforming process. In some embodiments, characteristics associated with the upper 102, such as, for example, thread type, thread type, or characteristics associated with different thread types or thread types, such as elasticity, aesthetic appearance, thickness, breathability, or resistance to rubbing against the foot, may be different.

[0026] Referring again to FIG. 1 , when the footwear 100 is worn by a user, the sole structure 104 connects or is secured to the upper 102 and extends between the user's foot and the ground. The sole structure 104 may include one or more components, which may include an outsole, a midsole, a heel, a vamp, and / or an insole. For example, in some embodiments, the sole structure may include an outsole that provides structural integrity to the sole structure while providing traction to the user, a midsole that provides a cushioning system, and an insole that provides support for the arch of the user. The insole may also be a strobel board, a toe board, a lasting board, or the like, or a combination thereof, and the insole may be provided between the upper 102 and the sole structure 104, or the insole may be provided as part of the upper 102.

[0027] Additionally, the insole can be located in the interior cavity 106 of the upper 102, which can be in direct contact with the user's foot while the footwear 100 is being worn. Additionally, the upper 102 can also include a liner (not shown) that can enhance comfort, for example, by reducing friction between the user's foot and the upper 102, sole structure 104, insole, etc., and / or by moisture wicking. The liner may reinforce the entire interior cavity 106 or only a portion thereof. In some embodiments, a trim (not shown) can surround the opening of the interior cavity 106 to secure the liner to the upper 102 and / or to provide an aesthetic element to the footwear 100.

[0028] 2 and 3, the footwear 100 may also define a lateral side 116 and a medial side 118. The lateral side 116 corresponds to an outer surface portion of the footwear 100 and the medial side 118 corresponds to an inner surface portion of the footwear 100 when the shoe is worn by a user. As such, the footwear 100 has opposing lateral sides 116 and 118. The medial side 118 and the lateral side 116 are adjacent to one another along a longitudinal central plane or axis 120 of the footwear 100 that is coplanar with the longitudinal axis L of FIG. 1. As discussed further herein, the longitudinal central plane or axis 120 may define a central, medial axis between the medial side 118 and the lateral side 116 of the footwear 100. In other words, the central plane or axis 120 may extend between a rear, proximal end 122 of the footwear 100 and a front, distal end 124 of the footwear 100 and may continuously define the center of the insole 126, sole structure 104, and / or upper 102 of the footwear 100; i.e., the longitudinal central plane or axis 120 is a straight line axis extending from a rear, proximal end 122 of the heel region 112 to a front, distal end 124 of the forefoot region 108.

[0029] 2 and 3, unless otherwise specified, footwear 100 may be defined by a forefoot region 108, a midfoot region 110, and a heel region 112. Forefoot region 108 generally corresponds to the portion of footwear 100 that completely encases the portion of foot 128 including the toes or phalanges 130, the ball of the foot 132, and one or more joints 134 that connect the metatarsals of foot 128 to the toes or phalanges 130. Midfoot region 110 is proximate and adjacent to forefoot region 108. Midfoot region 110 generally corresponds to the portion of footwear 100 that completely encases the arch of foot 128 along the bridge of foot 128. Heel region 112 is proximate and adjacent to midfoot region 110. Heel region 112 generally corresponds to that portion of footwear 100 that completely encases portions of foot 128, including the heel or calcaneus 138, the ankle (not shown), and / or the Achilles tendon (not shown).

[0030] 2 and 3, forefoot region 108, midfoot region 110, heel region 112, medial side 118, and lateral side 116 are intended to define boundaries or regions of footwear 100. Certain aspects of the present disclosure may refer to portions or elements coextensive with one or more of forefoot region 108, midfoot region 110, heel region 112, medial side 118, and / or lateral side 116. Additionally, both upper 102 and sole structure 104 may be characterized as having portions in forefoot region 108, midfoot region 110, heel region 112, and / or along medial side 118, and / or lateral side 116. Thus, the upper 102 and sole structure 104, and / or individual portions of the upper 102 and sole structure 104, may include portions thereof disposed in the forefoot region 108, the midfoot region 110, the heel region 112, and / or along the medial side 118, and / or the lateral side 116.

[0031] 2 and 3, the forefoot region 108, midfoot region 110, heel region 112, medial side 118 and lateral side 116 are shown in detail. The forefoot region 108 extends from the toe tip 140 to the widest portion 142 of the footwear 100. The widest portion 142 is defined or measured along a first line 144 perpendicular to the central axis 120 that extends from the distal portion of the toe tip 140 to the distal portion of the heel end opposite the toe tip 140. The midfoot region 110 extends from the widest portion 142 of the footwear 100 to a narrowest portion 148. The narrowest portion 148 of the footwear 100 is defined as the narrowest portion of the footwear 100 measured across a second line 150 perpendicular to the central axis 120. Heel region 112 extends from the narrowest portion 148 of footwear 100 to heel end 146 .

[0032] It should be understood that numerous variations will be apparent to those skilled in the art in view of the foregoing description, and that the individual components may be incorporated into numerous pieces of footwear. Accordingly, aspects of footwear 100 and its components may be described with reference to general areas or portions of footwear 100, and understandings of the boundaries of forefoot region 108, midfoot region 110, heel region 112, medial side 118, and / or lateral side 116 as described herein may vary between pieces of footwear. However, aspects of footwear 100 and its components may be described with reference to extracting areas or portions of footwear 100, and the claims appended hereto may incorporate limitations related to these boundaries of forefoot region 108, midfoot region 110, heel region 112, medial side 118, and / or lateral side 116 as discussed herein.

[0033] 2 and 3, the medial side 118 begins distally at the toe end 140 and curves outward along the medial side of the footwear 100 along the forefoot region 108 toward the midfoot region 110. The medial side 118 reaches a first line 144, at which point the medial side 118 curves inward toward the central axis 120. The medial side 118 extends from the first line 144, or widest portion 142, toward a second line 150, or narrowest portion 148, at which point the medial side 118 enters the midfoot region 110, or crosses the first line 144. Upon reaching the second line 150, the medial side 118 curves outward away from the longitudinal central axis 120, at which point the medial side 118 extends into the heel region 112, or crosses the second line 150. The medial side 118 then curves outwardly and then inwardly towards the heel end 146 , terminating at the point where the medial side 118 intersects the central longitudinal axis 120 .

[0034] The lateral side 116 also begins distally at the toe end 140 and curves outward along the lateral side of the footwear 100, along the forefoot region 108 toward the midfoot region 110. The lateral side 116 reaches a first line 144, at which point the lateral side 116 curves inward toward the central longitudinal axis 120. The lateral side 116 extends from the first line 144, or widest portion 142, toward a second line 150, or narrowest portion 148, at which point the lateral side 116 enters the midfoot region 110, or crosses the first line 144. Upon reaching the second line 150, the lateral side 116 curves outward away from the central longitudinal axis 120, at which point the lateral side 116 extends into the heel region 112, or crosses the second line 150. The outer side 116 then curves outwardly and then inwardly towards a heel end 146 , terminating at the point where the outer side 116 intersects the central longitudinal axis 120 .

[0035] 2 and 3, the upper 102 extends along a lateral side 116 and a medial side 118 across a forefoot region 108, a midfoot region 110, and a heel region 112 to wrap and encircle a user's foot. When fully assembled, the upper 102 also includes a medial side 162 and a lateral side 164. The medial side 162 faces medially and generally defines the medial void 106, and the lateral side 164 of the upper 102 faces outward and generally defines an outer perimeter or boundary of the upper 102. The upper 102 also includes an opening 166 disposed at least partially in the heel region 112 of the footwear 100 to provide access to the interior void 106 through which the foot may be inserted and removed. In some embodiments, the upper 102 may also include an instep region 168 that extends from an opening 166 in the heel region 112 across an area corresponding to the instep of the foot to an area adjacent the forefoot region 108. The instep region 168 may comprise an area similar to where the tongue 170 of this embodiment is located. In some embodiments, the upper 102 does not include the tongue 170, i.e., the upper 102 is the tongue.

[0036] In the illustrated embodiment, the sole structure 104 includes a midsole 172 and an outsole 174. The outsole 174 may define a bottom or bottom surface 176 of the sole structure 104 across the heel region 112, the midfoot region 110, and the forefoot region 108. Additionally, the outsole 174 may be a ground-engaging portion or surface of the sole structure 104, or the reverse of its insole. As illustrated in FIG. 1, the bottom surface 176 of the outsole 174 may include a sole pattern 178, which may include a variety of shapes and configurations. The outsole 174 may be formed from one or more materials to provide durability, abrasion resistance, wear resistance, or traction to the sole structure 104. In some embodiments, the outsole 174 may be formed from any type of elastomer, such as rubber, including thermoset elastomers or thermoplastic elastomers, or a thermoplastic material, such as thermoplastic polyurethane (TPU). In some embodiments, the outsole 174 may be manufactured by processes involving inkjet molding, vulcanization, printing layer by layer, additive manufacturing systems or methods, or the like.

[0037] With further reference to FIG. 1 , the midsole 172 may be individually constructed from a thermoplastic material, such as polyurethane (PU), for example, and / or ethylene vinyl acetate (EVA), copolymers thereof, or similar types of materials. In some embodiments, the midsole 172 may be an EVA solid sponge ("ESS") material, an EVA foam (e.g., PUMA® ProFoam Lite™, IGNITE Foam), a polyurethane, a polyester, an olefin block copolymer, an organosheet, a thermoplastic material, (e.g., thermoplastic polyurethane, thermoplastic elastomer, thermoplastic polyolefin, etc.), or a supercritical foam. The midsole 172 may be one type of polymer material or a blend of materials, such as EVA copolymer, thermoplastic polyurethane, polyether block amide (PEBA) copolymer, and / or olefin block copolymer. An example of a PEBA material is PEBAX®. In some embodiments, the midsole 172 may be manufactured by processes associated with inkjet molding, vulcanization, printing layer by layer, i.e., additive manufacturing systems or methods, etc.

[0038] In embodiments in which the midsole 172 is formed from a supercritical foaming process, the supercritical foam may comprise a microporous or particulate foam such as TPU, EVA, PEBAX®, or a mixture thereof, produced using a process that takes place in an autoclave, an injection molding apparatus, or a sufficiently heated / pressurized vessel capable of processing a mixture of a supercritical fluid (e.g., CO2, N2, or a mixture thereof) and the material to be preferably molded (e.g., TPU, EVA, a polyolefin elastomer, or a mixture thereof). In an exemplary process, a solution of a supercritical fluid and molding material is squirted into a pressurized vessel, and after the pressure in the vessel is released, the molecules of the supercritical fluid rapidly convert to a gas, forming small pockets in the material and spreading the material into the foam. In further embodiments, the midsole 172 may be formed using other methods known in the art, including utilizing an expansion process, an injection apparatus, a pellet expansion process, a cold forming process, a compression molding technique, die cutting, or a combination thereof. For example, the midsole 172 may be formed using an initial foaming process in which a supercritical gas is used to foam the material, followed by a process involving compression molding or die cutting to a particular shape.

[0039] 4 is a schematic diagram of footwear 200 having a closure system 204 including a closure mechanism 208 and laces 212 operably attached to the upper 102 and the closure mechanism 208 to tighten and / or loosen the footwear 200. Additionally, the closure system 204 includes an actuation mechanism in the form of a cable 220 having a ring end 224 configured to be pulled by a user's finger 228 to actuate the closure system 204 to perform one or more functions, such as tightening, unlocking, retracting, etc. To that end, the cable 220 is configured to be pulled away from the closure system 204 to actuate one of the functions of the closure system 204, and the cable 220 is configured to be retracted into the closure mechanism 208 to prevent entanglement, as described herein.

[0040] 4, the upper 102 includes a base layer 232 and an overlay 236 superimposed over the base layer 232. In particular, the overlay 236 is affixed to the base layer 232 in the forefoot region 108 and midfoot region 110 of the upper 102. The overlay 236 also includes wings 240 that extend diagonally around the heel, i.e., toward the heel end 146, and outwardly, i.e., toward the lateral side 116 of the footwear 200. The wings 240 are oval-shaped portions in which the closure mechanism 208 is located. In other embodiments, the closure mechanism 208 is attached elsewhere in the overlay 236, the upper 102, or the sole structure 104. As shown in FIG. 4, the laces 212 are threaded in an overlapping pattern along the overlay 236 through eyelets or guides 244 located on the upper 102. Thus, the guides 244 define an overlapping pattern that distributes the compressive force provided by the closure system 204 to tighten the footwear 200. In the illustrated embodiment, the guides 244 are located in the overlay 236, although other arrangements are possible. In some examples, the guides 244 may be formed by the overlay 236 or may be affixed to the upper 102 by the overlay 236. In other embodiments, the guides 244 are provided in the base layer 232 of the upper 102 and are separate from the overlay 236.

[0041] 5 shows the closure feature 208 disposed on a fastening element in the form of a panel 248 configured to be removably attached to the footwear 200. In the illustrated embodiment, the panel 248 includes a first end or front 252 opposite a second end or rear 256 and an upper side 260 opposite a bottom side (not shown). In the illustrated embodiment, the closure feature 208 is located closer to the rear 256 than to the front 252 of the panel 248, although other locations are contemplated. The panel 248 is configured to be removably attached to the upper 102 to secure the closure feature 208 to the upper 102 or to conceal or hide the closure feature 208 from exposure to the exterior of the footwear 200. To that end, the panel 248 may be fastened between layers of the upper 102, such as between the overlay 236 and the base layer 232, with the panel 248 and closure mechanism 208 being concealed or hidden beneath the overlay 236. Additionally, the panel 248 may be fastened in a variety of ways, such as by frictional and / or compressive forces exerted between the overlay 236 and the base layer 232 when the closure system 204 is actuated to fasten the footwear 200. In this manner, the panel 248 is securely fastened to the upper 102 when the footwear 200 is fastened, and the panel 248 is loosened for removal from the upper 102 when the footwear 200 is loosened. Additionally or alternatively, the panel 248 may be attached by adhesive, twist locks, by interaction with the laces 212, by engagement with fasteners, or by insertion into a pocket (not shown) formed between or within the layers of the upper 102 or in other configurations.

[0042] 4 and 5, the wings 240 of the overlay 236 can be partially affixed to the base layer 232 of the upper 102 to slide between the base layer 232 and the overlay 236, with the rear 256 located under the wings 240 on the lateral side 116 of the footwear 200 and the front 252 of the panel 248 located proximate the medial side 118 of the footwear 200. In this manner, when the footwear 200 is fastened by the closure system 204, the rear 256 of the panel 248 is suitably shaped to cooperate with the shape of the wings 240 and is secured by the applied compressive and / or frictional forces. It is also contemplated that a mounting recess (not shown) can be formed on the base layer 232 to receive a portion of the closure mechanism 208 and also assist in releasably securing the closure mechanism 208 and the panel 248 to the upper 102. Thus, the closure mechanism 208 releasably attaches the upper 102 to the lateral side 116 of the footwear 200 .

[0043] It is further contemplated that the closure mechanism 208 may be removably attached to the upper 102 without the panel 248. In some examples, the closure mechanism 208 is secured to the upper 102 by a portion of the laces 212 that are tied to the closure mechanism 208 and tighten the upper 102 during operation of the closure system 204 to tighten the footwear 200. In other embodiments, the closure mechanism 208 is fastened to the upper 102 or sole structure 104 in other manners, such as, for example, with adhesives, hook-and-loop fasteners, zippers, snap-fit ​​fasteners, twist-lock fasteners, etc. Thus, the closure mechanism 208 is configured to be removably attached to the footwear 200 for operation of the laces 212 to tighten and / or loosen the footwear 200. In this manner, the closure mechanism 208 is configured to accommodate multiple footwear uses, such as when a user changes shoe sizes or styles, particularly children's footwear, or when shoe sizes change frequently. Additionally, removal of the closure mechanism 208 allows the user to wear the footwear 200 in place of a traditional lace fastener or loosened slip-on fashion. It is further contemplated that the closure mechanism 208 may be attached to clothing, sporting goods, and luggage, storage items for fastening or loosening, among other users.

[0044] 6 is a schematic diagram of an exploded view of the closure mechanism 208. In the illustrated embodiment, the closure mechanism 208 includes a head cap 308 to which a rotating ratchet 312 including a first spool 316 is attached, about which the string 220 is configured to be collected and wound. The rotating ratchet 312 further includes a flange 320 having a plurality of radially spaced projections 324 configured to engage an arm 328. In the illustrated embodiment, the head cap 308 and the rotating ratchet 312 are attached to a second spool 332 by a shaft 336 that defines a rotation axis R1. Additionally, the string 220 passes through an opening 340 formed in the head cap 308 such that the rotating ratchet 312 rotates relative to the rotation axis R1 when the string 220 is pulled from the opening 340. Thus, the first spool 316 serves as a collector for the lace 220 and the second spool 332 serves as a collector for the lace 212 .

[0045] Also, the biasing mechanism 344 is provided in the form of a coil spring for engaging with the rotating ratchet 312 to retrieve or gather the string 220 after it has been pulled or unwound from the closure mechanism 208. Further, a slip clutch 348 is fixed to the shaft 336 for selectively engaging the second spool 332 and the rotating ratchet 312. For example, the slip clutch 348 engages with the rotating ratchet 312 and the second spool 332, and rotation of the shaft 336 is transferred by the slip clutch 348 to the second spool 332 for gathering or winding the string 212 around the second spool 332. Then, when an opening function of the closure mechanism 208 is actuated, the slip clutch 348 disengages from the rotating ratchet 312 or the second spool 332, and the string 212 is pulled or unwound from the second spool 332. It is further contemplated that string 220 can be pulled in different directions to activate different functions, such that certain functions are associated with particular directions.

[0046] 7 is a schematic diagram of another embodiment of footwear 400 having a closure system 404. In the illustrated embodiment, the closure system 404 includes a closure mechanism 408 that operably attaches laces 412. The laces 412 operably engage with a plurality of eyelets 416 to define a winding region 420420 of the upper 102. In particular, the closure mechanism 408 is configured to removably attach to the upper 102 for adjusting the footwear 400 between a tightening configuration or a loosening configuration. The laces 412 pass through the eyelets 416 disposed on the upper 102 at the winding region 420420 and also pass through a flap 424 that attaches the overlay 236 to the upper 102. The upper 102 also includes a pull tab 428 attached to the tongue 170 of the footwear 400 to allow a user to pull or return the tongue 170 to its original position when tightening or loosening the footwear 400. 7, the closure mechanism 408 is located in the take-up region 420-420 when secured to the tongue 170, exposing the footwear 400 generally to the outside. In the illustrated embodiment, a bumper 432 is provided at the toe end 140 of the upper 102. The bumper 432 may be provided as a viscous mixture of elastomeric material that stretches across the toe end 140 of the upper 102 for inserting the user's toes inside the upper 102, although other configurations are possible.

[0047] 8 is a schematic diagram of an exploded view of the closure mechanism 408 configured to be removably attached to the upper 102. In the illustrated embodiment, the head cap 480 is frustoconical, e.g., frustoconical, having a notch 484 formed on an inclined sidewall 488 between an upper end 492 and a lower end 496. The notch 484 and the frustoconical shape of the head cap 480 are ergonomically engaged by a user when rotating the closure mechanism 408 to rotate. The head cap 480 is also attached to a collector spool 500 by a shaft 504 that defines a rotation axis R2 of the closure mechanism 408. In the illustrated embodiment, the collector spool 500 includes an upper flange 508, a lower flange 512, and a passage 516 that extends transversely through the collector spool 500 relative to the rotation axis R2. Upper flange 508 and lower flange 512 are cylindrical, although other shapes are possible.

[0048] Also, the fastening element 520 is attached to the lower flange 512 of the collector spool 500 for securing the closure mechanism 408 to the footwear 400. In some embodiments, the fastening element 520 is included as part of the closure mechanism 408. Additionally, a locking interface (not shown), e.g., a plurality of interlocking teeth, may be provided between the collector spool 500 and the fastening element 520 to gradually secure the collector spool 500 against rotation relative to the fastening element 520 in a particular direction. In this particular embodiment, the fastening element 520 includes a channel 530 extending transversely to the rotation axis R2. The collector spool 500 can secure the head cap 480 thereto for simultaneous rotation therewith relative to the rotation axis R2. Additionally, the collector spool 500 may be rotatably attached to the fastening element 520 such that upon engagement with the lace 412, the fastening element 520 remains fixed against rotation about the rotation axis R2. As shown in FIG. 8, lace 412 includes opposed first and second ends 534, 538 each having a clasp thereon, although other arrangements are possible.

[0049] It is contemplated that the closure mechanism 408 may be attached to any footwear having conventional laces similar to the footwear 400 of FIG. 7. For example, a user may thread the lace 412 through the flap 424 and fewer than all of the lace holes 416 such that at least two of the lace holes 416 remain open and engaged with the lace 412. In some embodiments, four of the lace holes 416, preferably the four lace holes 416 located in the midfoot region 110 and closest to the pull tab 428 of the tongue 170, remain engaged with the lace 412 prior to attaching the closure mechanism 408 to the footwear 400 such that the first and second ends 534, 538 of the lace 412 are free and the footwear 400 is in a relaxed configuration. 8, the user threads opposing first and second end portions 534, 538 of lace 412 through channel 530 of fastening element 520 in opposite directions transverse to rotational axis R2. In this manner, closure mechanism 408 is removably attached to lace 412, and thus footwear 400.

[0050] As shown in FIG. 7, the closure mechanism 408 is located in the midfoot region 110 and is located between the flap 424 and the pull tab 428, although other locations are possible. The user then threads the first and second ends 534, 538 of the lace through the remaining holes 416, or the user threads the lace 412 through fewer than all of the holes 416. The user then threads the first and second ends 534, 538 of the lace 412 through the passages 516 of the collector spool 500 in a corresponding direction transverse to the axis of rotation R2, as shown in FIG. 8. In some embodiments, the passages 516 have a smaller diameter than the channels 530, such that when the laces 412 are received in the passages 516, increased frictional forces prevent the laces from slipping off of one another from the passages 516. In this manner, the footwear 400 is configured to further secure the laces 412 against slack when the footwear 400 is in a tightened configuration. It is contemplated that the passage 516 and the channel 530 may define the same diameter, or the passage 516 may define a larger diameter than the channel 530. The user then pulls the first and second ends 534, 538 of the lace 412 away from the collector spool 500 to secure the lace 412 and closure mechanism 408 to the footwear 400. In some embodiments, the user may, but is not required to, tie any suitable type of knot to secure the first and second ends 534, 538 of the lace 412.

[0051] Finally, the user activates the closure mechanism 408 by rotating the head cap 480 of the closure mechanism 408 about the axis of rotation R2 to wind the lace 412 onto the collector spool 500. In this manner, the footwear 400 is adjusted from a loosened configuration to a tightened configuration as the first and second ends 534, 538 of the lace 412 are wound or collected by the collector spool 500 by the rotation. Furthermore, during the rotation of the head cap 480 and the collector spool 500, the fixing element 520 does not change with respect to the axis of rotation R2 due to the engagement with a locking interface (not shown) between the lace 412 and the collector spool 500, which in turn prevents the collector spool 500 from reversely rotating with respect to the axis of rotation R2 in conjunction with locking the fixing element 520. In this manner, the closure mechanism 408 provides for gradual adjustment of the footwear 400 to a tightened configuration through engagement with the laces 412 of the footwear 400 .

[0052] To adjust the footwear 400 from a tightened to a loosened configuration, the user may pull the head cap 480 away from the collector spool 500 to create space in which the collector spool 500 may be displaced axially, i.e., parallel to the axis of rotation R2, away from the locking interface (not shown) on the fastening element 520. Thus, the collector spool 500 is free to rotate in the opposite direction relative to the axis of rotation R2 relative to securing the fastening element 520 so that the lace 412 is unwound from the collector spool 500. In some embodiments, the user may untie any knots that secure the lace 412 to the collector spool 500, and the user may position the first and second ends 534, 538 to unwind the lace 412 from the collector spool 500. Additionally, the lace 412 is disengaged from the channel 530 of the fastening element 520 to completely remove the closure mechanism 408 from the footwear 400.

[0053] FIG. 9 shows a schematic diagram of another embodiment of footwear 600 having a closure system 604 including a closure mechanism 608 and laces 612 operably attached to the closure mechanism 608 for tightening and / or loosening the upper 102 and the footwear 600. In this embodiment, elements that are identical or similar in shape, i.e., structurally and / or functionally, to elements in the first embodiment (footwear 100) are indicated by similar reference numerals. The laces 612 operably engage with a plurality of lacing holes 616 to define a certain 102 winding area 620. In particular, the closure mechanism 608 is configured to be removably attached to the upper 102 for adjusting the footwear 600 between a tightened configuration and a loosened configuration. The laces 612 are threaded through the lacing holes 616 disposed on the upper 102 at the winding area 620. The eyelets 616 are provided as openings or holes beside or adjacent the tongue 170 of the upper 102 for threading the lace 612 therethrough. Additionally or alternatively, the eyelets 616 may be provided as loops, flaps, or hooks extending from the upper and disposed along or on the tongue 170 for engaging the lace 612. As shown in FIG. 9 , the closure mechanism 608 is disposed within the wrapping region 620 and is fully exposed to the exterior of the footwear 600 while secured to the tongue 170. In the illustrated embodiment, the closure mechanism 608 is configured to be removably attached to the upper 102 for adjusting the footwear 600 between a tightened and a loosened configuration.

[0054] FIG. 10 is a perspective view of an upper 102 having a closure system 604. The closure mechanism 608 includes a collector spool 700 (see FIG. 11) configured to have a portion of lace 612 wound or unwound thereon. An arrow 614 in the figure is provided to indicate tightening or loosening of lace 612 relative to a horizontal axis L1. The closure system 604 is configured to be rotated to adjust the footwear 600 from a loosened to a tightened configuration and / or from a tightened to a loosened configuration. In some embodiments, the closure mechanism 608 may rotate relative to a vertical axis L2 that defines a direction along which the closure mechanism 608 extends.

[0055] FIG. 11 is a schematic diagram of a pre-assembled state or configuration showing arrows provided to indicate an insertion path along which string 612 is configured to engage with collector spool 700. In the illustrated embodiment, collector spool 700 shows a shaft 704 extending linearly between disk-shaped flanges 701, 702 that define a spool rotation axis R3 and a pair of tabs 724 centered on shaft 704 between disk-shaped flanges 701, 702. Each tab 724 defines a channel 730 through which one end of string 612 passes to engage collector spool 700. In some embodiments, a portion of string 612 and / or one end of string 612 is affixed within channel 730. It is contemplated that a user can untie the knot formed to secure string 612 to collector spool 700, after which the user can position first and second ends 734, 738 of string 612 and unwind string 612 from collector spool 700. In some embodiments, the aglet 742 of the lace 612 may include a lace lock (not shown) to secure the lace 612 to the collector spool 700 and prevent the lace 612 from dislodging from the channel 730. The first and second disk-shaped flanges 701, 702 each include an attachment tip 744 extending axially therefrom and intersecting the axis of rotation R3. In some embodiments, the first and second disk-shaped flanges 701, 702 may be integrally formed with the shaft 704. In operation, the lace 612 is threaded through the channel 730 of the tab 724 and wrapped around the shaft 704, which may be performed during manufacturing such that the footwear 600 is provided with a pre-wrapped lace 612 for user adjustment upon first use. Alternatively, the footwear 600 is provided with only a partially attached lace 612, requiring the user to complete assembly of the closure system 604 by attaching the lace 612 to the collector spool 700 prior to use. It will be appreciated that the laces 612 of the closure system 604 are configured to be accessible and removable at any time upon the desire of a user or as necessitated by degradation of the laces 612 during use.11. In some embodiments, the channel 730 may be formed across the shaft 704, as shown in FIG. 11. In this manner, the channel 730 is configured to accommodate the lace 612 and allow the lace 612 to be wrapped around the shaft 704. In some embodiments, the first and second disk-shaped flanges 701, 702 are rotatably mounted on opposite ends of the shaft 704 to provide a rotatable joint connection with the shaft 704 such that the shaft 704 can rotate about the spool rotation axis R3 relative to the first and second disk-shaped flanges 701, 702 which are fixed in place and prevented from rotating.

[0056] In operation, the collector spool 700 is housed inside the housing 748, as shown in FIG. 12. In the illustrated embodiment, the attachment tip 744 is received within an axial notch 750 formed within the housing 748. As such, the collector spool 700 is configured to receive the lace 612 wound around the shaft 704 of the collector spool 700 upon rotation of the collector spool 700 within the housing 748. Additionally, the collector spool 700 is configured to rotate about the attachment tip 744 housed within the axial notch 750 within the housing 748, such that the collector spool 700 rotates freely within the interior cavity of the housing 748. As the shaft 704 retrieves the lace 612, the working diameter of the lace 612 wound around the shaft 704 increases. Tightening the closure system 604 increases the length of the lace 612 wound around the collector spool 700, thereby increasing the working diameter of the lace 612. In some embodiments, the axial notches 750 are disposed around the periphery of the first and second disk-shaped flanges 701, 702, and the attachment tip 744 is disposed at an opposite end of the housing 748 relative to the spool rotation axis R3. A pivot joint 752 is formed by the attachment tip 744 and the axial notch 750 to permit rotational movement of the collector spool 700 within the housing 748. In some embodiments, the attachment tip 744 or the axial notch 750, or a combination thereof, may be provided with surface textures, ridges, protrusions, teeth, gears, etc. to increase the frictional forces acting against rotation of the collector spool 700 within the housing 748, such that the collector spool 700 resists unwinding and maintains incremental changes in tension applied to the lace 612.

[0057] FIG. 13 is a schematic diagram of a housing 748 of the closure mechanism 608. The housing 748 has a first portion 754 and a second portion 758, with an axial notch 750 formed in the second portion 758 for receiving the mounting tip 744 of the collector spool 700. Additionally, a locking interface (not shown) may be provided between the collector spool 700 and the stationary element 720 to incrementally secure the collector spool 700 against rotation in a particular direction relative to the stationary element 720. The mounting tip 744 and / or the axial notch 750 may function as a stationary element to prevent or selectively permit rotation. The housing 748 may include a first channel 766 and a second channel 770 that are partially disposed by the first portion 754 and the second portion 758 of the housing 748. It is within the scope of this disclosure that the mechanisms and elements disclosed in connection with the embodiments of FIGS. 7 and 8 may be implemented in the closure system 604.

[0058] FIG. 14 is a schematic diagram of another embodiment of a housing 780 of the closure mechanism 608 (see FIG. 10), which has similarities to the housing 748 of FIG. 13. In the illustrated embodiment, the housing 780 comprises a first portion 754 and a second portion 758. The housing 780 may include a shaft 760 comprising a first shaft portion 762 formed adjacent the first portion 754 of the housing 780 and a second shaft portion 764 formed adjacent the second portion 758 of the housing 780. The first channel 766 and the second channel 770 are disposed within an upper sidewall 782 of the first portion 754 of the housing 780. The second portion 758 includes a lower sidewall 784 that includes a notch 786. The housings 748, 780 are shown in FIGS. 12-14 as generally cylindrical housings. In some embodiments, the housings 748, 780 may be provided in a triangular prism shape, a rectangular shape, a polygonal shape, a rectangular shape, an irregular shape, or any suitable shape.

[0059] FIG. 15 shows a schematic diagram of another embodiment of footwear 800 having a closure system 804 including a closure mechanism 808 for tightening and loosening the footwear 800, and a shoe lace 812 operably coupled to the upper 102 and the closure mechanism 808. In this embodiment, elements shared with elements present in the previous embodiment (see FIGS. 9-14), i.e., structurally and / or functionally identical or similar elements, are represented by the same reference numerals. The shoe lace 812 operably engages with a plurality of lacing holes 816 to define a wrapping region 820 of the upper 102. In particular, the closure mechanism 808 is configured to be removably attached to the upper 102 for adjusting the footwear 800 between a tightened and a loosened configuration. The shoe lace 812 is threaded through the lacing holes 816 disposed on the upper 102 in the wrapping region 820. The eyelets 816 are provided as openings or holes in the upper beside or adjacent to the tongue 170 through which the lace 812 is threaded. Additionally or alternatively, the eyelets 816 may be provided as loops, flaps, or hooks extending from the upper and positioned along or on the tongue 170 for engaging the lace 812. As shown in FIG. 15 , the closure mechanism 808 is disposed within the wrapping region 820 and is fully exposed to the exterior of the footwear 800 while secured to the tongue 170. In the illustrated embodiment, the closure mechanism 808 is configured to be removably attached to the upper 102 to adjust the footwear 800 between a tightened and a loosened configuration.

[0060] FIG. 16 is a schematic diagram of an exploded view of a closure mechanism 808 configured to be removably attached to the upper 102. In the illustrated embodiment, the head cap 880 has diametrically opposed recesses 884 formed in an inclined sidewall 888 between an upper end 892 and a lower end 896. The recesses 884 are provided to accommodate a rotating spool 898 that rotates about a first rotation axis R4A. A first disk-shaped flange 901 and a second disk-shaped flange 902 are disposed at the axial end of the rod 899 to hold the lace 812 along the rod 899. Additionally, the rotating spool 898 may include similar components (e.g., channel 730) as the spool 700 shown in FIG. 11. The lace 812 is configured to rotate about the first rotation axis R4A and to be wound around the rod 899 that intersects with the first rotation axis R4A.

[0061] Further, the head cap 880 is attached to a collector spool 900 that defines a second axis of rotation R4B of the closure mechanism 808. In the illustrated embodiment, the collector spool 900 includes a top portion 903 and a shaft 904 that connects the top portion 903 to a bottom portion 905. In some embodiments, the rod 899 defines a first axis of rotation R4A and the shaft 904 defines a second axis of rotation R4B, the first axis of rotation R4A and the second axis of rotation R4B being disposed perpendicular to each other. The top portion 903 includes a top flange 908 and the bottom portion 905 includes a bottom flange 912. The top flange 908 may include a plurality of protrusions 914 that extend parallel to the axis of rotation R4B. In the illustrated embodiment, each protrusion of the plurality of protrusions 914 includes an angled tip 918 for engaging the head cap 880. The plurality of protrusions 914 are disposed diametrically opposite each other and are formed to match the shape of the recess 884 and the angled sidewall 888 of the head cap 880. The head cap 880 is removably (e.g., snap-fit) attached to the collector spool 900 by engaging the plurality of protrusions 914. In the illustrated embodiment of FIG. 17, the head cap 880 is coupled to the collector spool 900 by engaging the plurality of protrusions 914, and a rotating spool 898 is disposed therebetween. The rotating spool 898 may include an opening (not shown) or a locking mechanism (not shown) disposed along a rod 899. The lace 812 is attached to the rod 899 such that when the rotating spool 898 is rotated to tighten or loosen the lace 812, the lace 812 is wound around the rod 899. When the rotating spool 898 rotates about the first rotation axis R4A, a portion of the lace 812 is wound around, i.e., collected by, the collector spool 900.

[0062] In some embodiments, the pivot joint 916 is carried by a lower flange 912 of the lower portion 905 and extends coaxially with respect to the axis of rotation R4B. The upper flange 908 and the lower flange 912 are cylindrical, although other shapes are also contemplated. In some embodiments, the upper portion 903 and the lower portion 905 are configured to rotate relative to each other about the pivot joint 916 and the second axis of rotation R4B. As a result of this rotation, the race 812 can be wrapped around the shaft 904 of the collector spool 900. Thus, an additional length of the race 812 can be wrapped around the rotating spool 898, which can be used to adjust the tension of the race 812 and secure the rotating spool 898 according to the desired tension. Referring to the figure, the lower flange 912 includes a fixing element 920 extending therefrom as a U-shaped member, with a channel 922 defined between the fixing element 920 and the lower flange 912. In operation, the lace 812 is threaded through the channel 922 of the fixation element 920 transversely to the second axis of rotation R4B, securely attaching the collector spool 900 to the footwear 800. In some embodiments, the lace 812 is wrapped around the outside of the fixation element 920, securely attaching the collector spool 900 to the footwear 800. The rotating spool 898 is configured to be positioned over the upper flange 908.

[0063] FIG. 18 shows the lower portion 905 of the collector spool 900. In the illustrated embodiment, the lower flange 912 is generally disk-shaped, although other shapes are contemplated. The pivot joint 916 is formed, in part, by a cylindrical stem or connector 926 extending from the lower flange 912 of the lower portion 905. The connector 926 is configured to be attached, for example, by a snap fit, to the shaft 904 of the upper portion 903 (see FIG. 18) of the closure mechanism 808, such that the upper portion 903 can rotate relative to the lower portion 905. The pivot joint 916 is disposed axially opposite the upper flange 908 of the shaft 904. A rectangular panel 942 is coupled to the lower flange 912 by a hinge 944 to form a hinge mechanism for securing the collector spool 900 to the footwear 800 (see FIG. 15). The panel 942 has a number of rivets 952 around which the lace 812 can be wrapped or wound. In the illustrated embodiment, a locking mechanism 956 is provided for securing the panel 942 to the connector 926, although other configurations are contemplated.

[0064] 19 shows a schematic diagram of another embodiment of footwear 1000 having a closure system 1004 including a closure mechanism 1008 and a lace 1012 operably coupled to the upper 102 and the closure mechanism 1008 for tightening and loosening the shoe 200. The lace 1012 operably engages with a plurality of lacing holes 1016 to define a wrapping region 1020 of the upper 102. In particular, the closure mechanism 1008 is configured to be removably attached to the upper 102 for adjusting the footwear 1000 between a tightened configuration and a loosened configuration. The lace 1012 is threaded through the lacing holes 1016 disposed on the upper 102 in the wrapping region 1020. The lacing holes 1016 are provided as openings or holes beside or adjacent to a tongue 170 of the upper 102 through which the lace 1012 can be threaded. Additionally or alternatively, the eyelets 1016 may be provided as loops, flaps, or hooks extending from the upper 102 and disposed along or on the tongue 170 for engaging the laces 1012. As shown in FIG. 19 , the closure mechanism 1008 is disposed within the wrap region 1020 and is fully exposed to the exterior of the footwear 400 while secured to the tongue 170. In the illustrated embodiment, the closure mechanism 1008 is configured to be removably attached to the upper 102 to adjust the footwear 1000 between a tightened and a loosened configuration.

[0065] 20 is a schematic diagram of an exploded view of a closure mechanism 1008 configured to be removably attached to the top 102. The closure mechanism 1008 includes a spool base 1098 and a collector spool 1100. The collector spool 1100 is removably attached to the spool base 1098. In the illustrated embodiment, the collector spool 1100 includes a shaft 1104 extending between a first flange 1108 and a second flange 1112. The first flange 1108 and the second flange 1112 are connected by the shaft 1104 and configured to rotate about a first axis of rotation R5 defined by an axial direction of the shaft 1104. In the illustrated embodiment, the first flange 1108 and the second flange 1112 are cylindrical, although other shapes are contemplated. The collector spool 1100 is configured to rotatably mate with a spool base 1098, with the first flange 1108 and the second flange 1112 frictionally engaging the spool base 1098 both axially and rotationally to partially prevent rotation. Additionally, the spool base 1098 includes a groove 1084 that causes the lace 1012 to wrap around the collector spool 1100 as it rotates about the rotation axis R5. The spool base 1098 may include an opening (not shown) for receiving the lace 1012. The spool base 1098 is configured to be coupled to a locking mechanism 1160 provided in the form of a lace lock disc. In the illustrated embodiment, the lace lock disc 1160 is attached to a bottom housing 1166, although other configurations are possible. The bottom housing 1166 includes a central shaft 1168 extending from a bottom surface 1170 of the bottom housing 1166. The central shaft 1168 includes a groove 1172 that can be used to partially couple the race lock disc 1160 to the bottom housing 1166. The race lock disc 1160 includes a protruding flange 1174 that extends from the bottom surface 1170 of the race lock disc 1160 and extends partially radially about the center stem 1180. In some embodiments, the protruding flange 1174 may be configured to function as a locking feature for selective engagement with the race lock disc 1160.In operation, the lace 1012 is wound around the center stem 1180, which defines a vertical axis of rotation R6 of the bottom housing 1166. The lace 1012 is inserted into the channel 1130 of the spool. The lace 1012 disengages from the base 1098 and continues to be wound around the lace locking disc 1160. In some embodiments, the lace 1012 is inserted through an opening (not shown) in the collector spool 1100, and the lace 1012 is wound around the collector spool 1100. The lace locking disc 1160 is configured to rotate about a second axis of rotation R6 that is perpendicular to the first axis of rotation R5.

[0066] 21 is a top view of the lace securement disk 1160 and bottom housing 1166. In use, the lace 1012 is wrapped around a center stem 1180 of the lace securement disk 1160, which is configured to fit within the bottom housing 1166. The protruding flange 1174 orients the lace 1012 to be wrapped around the center stem 1180. In some embodiments, the lace 1012 can be wrapped by rotating the lace securement disk 1160 clockwise 1182, and the lace 1012 can be unwound by rotating the lace securement disk 1160 counterclockwise.

[0067] FIG. 22 is another embodiment of footwear 1200 having a closure system 1204 operably coupled to a closure mechanism 1208 in the form of a lace collector spool 1210 and a lace 1212 to tighten or loosen the lace 1200. In this embodiment, elements shared with elements present in the first embodiment (footwear 100), i.e., structurally and / or functionally identical or similar, are represented by similar reference numerals. The lace 1212 operably engages with a plurality of lacing holes 1216 to define a wrapping region 1220 of the upper 102. In particular, the closure mechanism 1208 is configured to be removably attached to the upper 102 to adjust the footwear 1200 between a tightened and a loosened configuration. The lace 1212 is threaded through the lacing holes 1216 located on the upper 102 within the wrapping region 1220. The eyelets 1216 are provided as openings or holes beside or adjacent the tongue 170 of the upper 102 through which the lace 1212 is threaded. Additionally or alternatively, the eyelets 1216 may be provided as loops, flaps, or hooks extending from the upper 102 and disposed along or on the tongue 170 for engaging the lace 1212. As shown in FIG. 22 , the closure mechanism 1208 is disposed within the wrapping region 1220 and is fully exposed to the exterior of the footwear 1200. In the illustrated embodiment, the closure mechanism 1208 is configured to be removably attached to the upper 102 to adjust the footwear 1200 between a tightened and a loosened configuration.

[0068] 23 is a schematic diagram of a perspective view of the outside 116 of footwear 1200 having a closure system 1204. A lace 1212 is wrapped or wrapped around a closure mechanism 1208 and tied or knotted to secure the lace 1212. The closure mechanism 1208 is attached to a fastening element 1222 that includes an upper portion 1224 and a lower portion 1226. The upper portion 1224 and the lower portion 1226 form a plurality of protrusions 1228. The upper portion 1224 of the plurality of protrusions 1228 may include a protrusion 1230 (see FIG. 26), and the lower portion 1226 of the plurality of protrusions 1228 may include a socket 1232 (see FIG. 26) that receives the protrusion 1230.

[0069] FIG. 24 is a perspective view of the closure mechanism 1208. The closure mechanism 1208 includes a race collector spool 1210 with a head cap 1234. In the illustrated embodiment, the head cap 1234 is conical or hemispherical and is secured to an upper flange 1236. A shaft 1238 extends axially from the upper flange 1236 opposite the head cap 1234 to a lower flange 1240, the shaft 1238 connecting the upper flange 1236 and the lower flange 1240. In some embodiments, the upper flange 1236, the shaft 1238, and the lower flange 1240 are formed as a single piece. The lower flange 1240 is attached to a protrusion 1242 that couples to the fixed element 1222 (see FIG. 23). The protrusion 1242 may include a number of ridges 1244 arranged radially around a sidewall 1246 of the protrusion 1242. In some embodiments, the shaft 1238 may include an opening 1248 to receive the lace 1212 .

[0070] FIG. 25 is a perspective view of the fixation element 1222. The fixation element 1222 includes a plurality of protrusions 1228 configured to engage the upper 102 of the footwear 1200 (see FIG. 23). The fixation element 1222 further includes a central bore 1250 and a spring 1252 operatively connected to a plunger 1254. The plunger 1254 is configured to be biased to an extended position, with the plunger 1254 disposed within the central bore 1250. In operation, the plunger 1254 is moved toward a contracted position to displace the central bore 1250, thus compressing the spring 1252 with sufficient force to overcome the bias of the spring 1252. The protrusion 1242 (see FIG. 24) is inserted into the central bore 1250 of the fixation element 1222, with the plurality of ridges 1244 partially engaging the plunger 1254. The protrusions 1242 are configured to be removably attached to the fixation element 1222 and can be removed as shown in FIG.

[0071] FIG. 26 is a perspective view of a securing element 1222 that is generally X-shaped and attached to the upper 102 of the footwear 1200 and partially overlies the tongue 170 (see FIG. 23). In some embodiments, the projection 1228 has a projection 1230 at its distal end 1260 that is configured to be inserted into the eyelet 1216 and mate (e.g., via a snap fit) with an opposite distal end 1260 of the projection 1228 that has a socket 1232 configured to receive the projection 1230. The securing element 1222 includes a central hole 1250 centrally located in the upper portion 1224 of the securing element 1222. In some embodiments, the central hole 1250 may extend through both the upper portion 1224 and the lower portion 1226 of the securing element 1222.

[0072] 27 is an exploded view of a closure system 1204 including a closure mechanism 1208 and a fastening element 1222. In this disclosure, the upper portion 1224 of the fastening element 1222 includes a socket 1232 and the lower portion 1226 of the fastening element 1222 includes a protrusion 1230. In operation, the lace 1212 is wound around the shaft 1238 of the lace collector spool 1210. As shown in FIG. 24, the shaft 1238 may include an opening 1248 that partially receives the lace 1212. The protrusion 1242 of the closure mechanism 1208 is configured to connect to a central hole 1250 of the fastening element 1222.

[0073] Figure 28 is a perspective view of an alternative embodiment of a closure mechanism 1408 that includes a head cap 1410 that is functionally similar to the head cap 1234 of Figure 24. The head cap 1410 has a plurality of protrusions 1416 and indicia 1420 on an exterior surface 1424 thereof.

[0074] 29 is a perspective view of another embodiment of a closure mechanism 1508 including a head cap 1510. The head cap 1510 of the closure mechanism 1508 may be provided as a conical or frusto-conical member, although other configurations are possible. The head cap 1510 further includes a plurality of indentations 1516 and a sloped sidewall 1520 disposed between an upper end 1524 and a lower end 1528 of the head cap 1510.

[0075] FIG. 30 is a perspective view of the outer side 116 of footwear 1900 with a closure system 1904 including a closure mechanism 1908 operably coupled to the upper 102 and the closure mechanism 1908 to tighten or loosen the footwear 1900, and a shoe lace 1912. In this embodiment, elements shared with elements present in the first embodiment (footwear 100), i.e., elements that are structurally and / or functionally the same or similar, are represented by the same reference numerals. The shoe lace 1912 operably engages with a plurality of lacing holes 1916 to define a wrapping region 1920 of the upper 102. In particular, the closure mechanism 1908 is configured to be removably attached to the upper 102 to adjust the footwear 1900 between a tightened configuration and a loosened configuration. The shoe lace 1912 is threaded through the lacing holes 1916 located on the upper 102 within the wrapping region 1920. Lacing holes 1916 are defined as openings or holes beside or adjacent to the tongue 170 of the upper 102 through which the lace 1912 is threaded, or alternatively, the lace holes 1916 are provided as loops, flaps, or hooks extending from the upper 102 and disposed along or on the tongue 170 for engaging the lace 1912. The closure mechanism 1908 is disposed within the wrap region 1920 and is fully exposed to the exterior of the footwear 1900. In the illustrated embodiment, the closure mechanism 1908 is configured to be removably attached to the upper 102 for adjusting the footwear 1900 between a tightened and a loosened configuration.

[0076] FIG. 31 is a perspective view of the closure mechanism 1908 in the first position 1938. The closure mechanism 1908 includes a center button 1940. The spool 1944 includes a shaft 1946 that extends from the center button 1940 to a base 1948. The base 1948 may be a disk-shaped member or a flange, among other shapes. In operation, the center button 1940 is pressed when a user lifts or pulls the head cap or collar 1952 off the center button 1940. The collar 1952 includes indentations 1953 arranged radially around the collar 1952, which ergonomically improve the user's grip of the collar 1952. In some embodiments, the center button 1940 is spring loaded and can be latched and unlatched by successive depressions of the center button 1940.

[0077] FIG. 32 is a perspective view of the closure mechanism 1908 in the second position 1956. In operation, the lace 1912 is fed into the hole 1960 located adjacent to the top flange 1964 located on the opposite side of the base 1948. The top flange 1964 may be integrally formed with the center button 1940. The shaft 1946 is disposed between the top flange 1964 and the base 1948 of the spool 1944. As shown in FIG. 16, the top flange 1964 is integrally formed with the shaft 1946, and a pivot joint (not shown) is formed at the lower end 1968 of the shaft 1946. The pivot joint (not shown) is configured to form a rotational joint between the base 1948 and the top flange 1964 of the spool 1944 to reel in the lace 1912.

[0078] 33 is a perspective view of the closure mechanism 1908 in the third position 1972. In use, the collar 1952 is pushed back onto the closure mechanism 1908. In the present disclosure, the collar 1952 may snap onto an upper flange 1964 (see FIG. 32 ) of the spool 1944 to secure the lace 1912 within an aperture 1960 located adjacent the upper flange 1964 of the closure mechanism 1908.

[0079] 34 is a perspective view of the closure mechanism 1908 in the fourth position 1976. In use, the lace 1912 is wound around and secured to the shaft 1946 of the spool 1944. In this disclosure, the upper flange 1964 of the spool 1944 is rotated in a clockwise direction to tighten the lace 1912 of the footwear 1900 and is rotated in a counterclockwise direction to loosen the lace 1912 of the footwear 1900.

[0080] 35 is a perspective view of another embodiment of collar 1952. Collar 1952 can be replaced with collars 1982, 1986, 1990 of different colors, shapes and designs, including those having protrusions or recesses around the perimeter.

[0081] 36 is a perspective view of the exterior side 116 of footwear 1900 having a closure system 1904 operatively attached to the tongue 170 of the upper 102. The closure system 1904 includes a fastening element 2010 having a hook 2012 that is attached to a central loop 2004 of the tongue 170 of the upper 102. In some embodiments, the hook 2012 may be connected as a living hinge, a clip, or the like.

[0082] FIG. 37 is another embodiment of a footwear 2100 having a closure system 2104 including a closure mechanism 2108 with a fastening element 2110 provided in the form of a plug for attachment to the footwear 2100. The closure mechanism 2108 includes similar components as those shown in the closure mechanism 1908 shown in FIGS. 19A-19C. In operation, an opening 2114 is disposed on a bottom surface 2116 of the closure mechanism 2108. A T-shaped projection 2120 extending from an inner base 2124 is threaded through a hole 2128 in the tongue 170 and connected to the closure mechanism 2108. The opening 2114 receives the T-shaped projection 2120 and attaches the closure mechanism 2108 to the footwear 2100.

[0083] Thus, the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 are configured for use with a variety of footwear via conventional shoe laces. For example, the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 may be provided for use with different sizes or styles of footwear, particularly footwear for children of an age where shoe sizes change frequently. Thus, the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 are configured to be provided in a variety of colors. The head caps of the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 may be equipped with lights (not shown), such as, for example, LED lights that are activated by agitation or impact. Additionally, the tops of the head caps or collars 1952, 1982, 1986, 1990 may be customized or personalized with logos, letters, symbols, numbers, or other indicia or markings. It is further contemplated that the fastening elements of the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 may be configured for releasable attachment to the footwear 200, 400, 600, 800, 1000, 1200, 1900, 2100 without engagement with the laces, such as by engagement with a flap or pull tab, among other configurations.

[0084] It is believed that the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 may be similar to those disclosed in U.S. Patent Nos. 5,325,613, 5,600,875, 5,606,778, 5,638,588, 5,651,198, and 5,669,116, all of which are commonly assigned to Puma SE and are incorporated by reference herein in their entireties. For example, it is contemplated that the closure mechanisms 208, 408, 608, 808, 1008, 1208, 1408, 1508, 1908, 2108 may include one or more aspects of a closure mechanism to provide tightening or loosening functionality when worn on the respective footwear 200, 400, 600, 800, 1000, 1200, 1900, 2100 of the present disclosure.

[0085] In other embodiments, other configurations are possible. For example, certain features and combinations of features presented with respect to certain embodiments in the above description can be utilized in other embodiments and other combinations, as appropriate. Additionally, any of the embodiments described herein may be modified to include any of the structures or methods disclosed in connection with other embodiments. Additionally, the disclosure is not limited to the types of footwear articles specifically shown. Additionally, aspects of any of the footwear articles of the embodiments disclosed herein may be modified to work with any type of footwear, apparel, or other athletic equipment.

[0086] As mentioned above, although the present invention has been described above with reference to specific embodiments and examples, those skilled in the art will appreciate that the present invention is not necessarily so limited, and that numerous other embodiments, examples, uses, modifications, and departures from the embodiments, examples, and uses are intended to be encompassed by the claims appended hereto. The entire disclosure of each patent and publication cited herein is incorporated by reference as if each patent or publication were individually incorporated by reference herein. Various features and advantages of the present invention are set forth in the following claims. [Industrial Applicability]

[0087] Numerous modifications to the present invention will be apparent to those skilled in the art from the foregoing description. Accordingly, this description is to be construed as illustrative only and is presented for the purpose of enabling any person skilled in the art to make and use the invention. The exclusive rights to all modifications that come within the scope of the appended claims are reserved.

Claims

1. a closure mechanism including a spool and at least one attachment tip protruding from the spool; a fixation element including a notch in a spool housing configured to receive the at least one attachment tip; a lace configured to operably engage with an upper of the footwear; the fastening element is configured to engage the footwear and the closure mechanism to releasably secure the fastening element to the footwear, the closure mechanism is configured to be rotated relative to the fastening element to adjust the footwear between a relaxed configuration and a tightened configuration, and the lace is configured to engage the closure mechanism; the spool includes a shaft and a first tab and a second tab centrally located on the shaft between a first disk-shaped flange and a second disk-shaped flange, the first tab including a first channel extending therethrough and the second tab including a second channel extending therethrough; the lace has a first end configured to pass through the first channel and a second end configured to pass through the second channel; A closure system for footwear, wherein the first disk-shaped flange and the second disk-shaped flange are configured to rotate with the spool housing.

2. The closure system of claim 1 , wherein the laces pass through a plurality of lace holes formed on the upper and through at least one channel formed on the collector spool.

3. The closure system of claim 1 , wherein the fastening element is attached to a tongue of the footwear.

4. The closure system of claim 3 , wherein the fastening element further comprises a hook configured to engage the tongue of the footwear.

5. The closure system of claim 1 , wherein the spool housing defines an interior volume, and the spool is configured to be entirely contained within the interior volume.

6. A closure mechanism; A fixed element; a lace configured to operably engage with an upper of the footwear; 1. A closure system for footwear, wherein the closure mechanism is configured to operate to adjust from a loose configuration to a tightened configuration, the closure mechanism including a first spool and a second spool, the first spool defining a first axis of rotation and the second spool defining a second axis of rotation disposed perpendicular to the first axis of rotation, the first spool configured to releasably engage the second spool, and the first spool configured to rotate about the first axis of rotation and the second axis of rotation.

7. The closure system of claim 6 , wherein the second spool includes an upper portion, a shaft, and a lower portion, the upper portion configured to rotate relative to the lower portion.

8. The closure system of claim 7 , wherein the top portion includes a plurality of projections, and a head cap is removably attached to the plurality of projections.

9. 7. The closure system of claim 6, wherein the first spool includes a shaft disposed between a first flange and a second flange, the shaft including at least one aperture for receiving the lace.

10. The closure system of claim 6 , wherein the fastening element includes a hinged mechanism for releasably attaching the closure mechanism to the footwear.

11. The closure system of claim 9 , wherein the first flange and the second flange are configured to rotatably engage a spool base.

12. The closure system of claim 6 , wherein the closure mechanism is removably attached to the fastening element.

13. The closure system of claim 6 , wherein the lower portion of the closure mechanism includes a hook configured to be removably attached to a tongue of a footwear item.

14. The closure system of claim 6 , wherein the fastening element is a U-shaped member defining a channel through which at least a portion of the lace passes.

15. Providing a closure mechanism comprising at least one spool including a shaft with a first tab centrally located on the shaft and including a first channel extending therethrough, and a second tab centrally located on the shaft and including a second channel extending therethrough; providing a fastening mechanism configured to releasably secure the closure mechanism to footwear; providing a string that engages the closure mechanism, the string connecting with the shaft; Equipped with the spool is rotated in a first direction to adjust the footwear to a tightened configuration; a first end and a second end of the lace are configured to pass through the channel, the first end being configured to pass through the first channel and the second end being configured to pass through the second channel; A method of assembling a closure system for footwear, wherein the spool is rotated in a second direction to adjust the footwear to a relaxed configuration.

16. The method of claim 15 , wherein the first direction is opposite to the second direction.

17. The method of claim 16 , wherein the securing mechanism is disposed in an upper of an article of footwear.

18. a closure mechanism configured to be removably attached to an upper of a footwear item, the closure mechanism including a collar disposed adjacent a central button, a base located opposite the central button, and a shaft disposed between the central button and the base; a fastening element that releasably fastens the closure mechanism to the upper; and a shoe lace operably engaged with the footwear upper and the shaft of the closure mechanism; the collar and the central button are detachable from each other; A closure mechanism for footwear, wherein the shaft is rotatable to wind the lace to adjust the tightness of the footwear.

19. 20. The closure mechanism of claim 18, wherein the collar is configured to be positioned away from the base to expose a plurality of holes through which a shoe lace is configured to be received.

20. 20. The closure mechanism of claim 18, wherein the collar is configured to be removable from the center button and replaced with another collar having at least one characteristic different from the collar, the at least one characteristic including color, shape, or design.

21. The closure mechanism of claim 18 , wherein the fastening element includes a hook configured to be releasably attached to a central loop of a tongue of the upper.

22. 20. The closure mechanism of claim 18, wherein the fastening element includes a plug having an inner base and a projection configured to be removably received in an opening in the closure mechanism.

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