Aspects herein relate to a knitted upper assembly for an article of footwear.
Conventional articles of footwear generally include an upper and a sole structure. The upper is secured to the sole structure and forms a void on the interior of the footwear for comfortably and securely receiving a foot. Conventional uppers, including knit uppers, may stretch and abrade over time, which may decrease their useable life. In some instances, multiple material elements may be layered on top of each other to limit stretch and/or to provide abrasion resistance to select areas of the upper. However, the layering of the material elements may reduce air permeability and breathability of the upper, which may cause wearer discomfort.
Examples of aspects herein are described in detail below with reference to the attached drawing figures, wherein:
Conventional articles of footwear generally include an upper and a sole structure. The upper is secured to the sole structure and forms a void on the interior of the footwear for comfortably and securely receiving a foot. Conventional uppers, including knit uppers, may stretch and abrade over time, which may decrease their useable life. In some instances, multiple material elements may be layered on top of each other to limit stretch and/or to provide abrasion resistance to select areas of the upper in order to increase the useable life of the article of footwear. However, the layering of the material elements may reduce air permeability and breathability of the upper, which may cause wearer discomfort.
At a high level, aspects herein are directed toward an upper assembly for an article of footwear that increases support and fit in select areas of the upper as well as increases durability and resistance to abrasion while maintaining permeability and breathability for wearer comfort. The upper assembly includes a knit element that defines at least a portion of an exterior surface of the upper assembly. The knit element extends from a throat area to a lower area of the upper assembly along at least a medial side, a lateral side, and a toe area of the upper assembly. The knit element includes a first plurality of aperture groupings that extend from the throat area to the lower area along the medial and lateral sides of the upper assembly. The upper assembly further includes a tongue, which may also comprise a knit construction that includes elastic yarns. The tongue defines at least a portion of an interior surface of the upper assembly. The tongue extends across the throat area and further extends along at least a portion of the medial side and the lateral side of the upper assembly to the lower area of the upper assembly. The tongue comprises a second plurality of aperture groupings that also extend from the throat area to the lower area along the medial and lateral sides of the upper assembly. The apertures in the second plurality of aperture groupings are axially aligned with at least a portion of the apertures in the first plurality of aperture groupings such that a fluid communication path is formed between an interior of the article of footwear and an environment external to the article of footwear. As used herein, the term “axially aligned,” with reference to apertures, refers to the apertures on the tongue and the knit element being spatially aligned along a common axis, where that axis extends through the width of the tongue and knit element as described in more detail with respect to
The tongue and the knit element are selectively secured to each other. For example, the tongue and the knit element may be secured to each other at the lower area of the upper assembly on each of the medial side and the lateral side. In further example aspects, the tongue and the knit element may be secured to each other at a forward portion of the throat area. Remaining portions of the tongue are not secured to the knit element, which allows for some movement or shifting of the tongue relative to the knit element. This may facilitate wearer comfort by lessening tension forces on the wearer's foot during certain athletic activities that cause shifting of the foot within the upper. To decrease the likelihood of the apertures in the knit element and the tongue from becoming misaligned due to shifting between the two layers, in example aspects, the number of apertures per unit area in the tongue is greater than the number of apertures per unit area in the knit element. This increases the probability that at least some of the apertures in the tongue are axially aligned with at least some of the apertures in the knit element. Moreover, by minimizing the number of apertures in the knit element relative to the tongue, greater structural integrity and resistance to environmental elements (e.g., dirt, pebbles, rain, and the like) is imparted to the knit element.
The positioning of the tongue and its use of elastic yarns creates an additional level of fit and support along the medial and lateral sides of the upper assembly in at least the midfoot region of the article of footwear. The layered configuration may further make the upper assembly more resistant to abrasion and wear-and-tear, thereby increasing the useful life of the article of footwear. The axially aligned apertures in the tongue and the knit element minimize heat and moisture retention, which improves wearer comfort.
As used herein, an article of footwear generally includes a sole structure secured to an upper or an upper assembly. The article of footwear described herein may comprise a running shoe, a baseball shoe, a basketball shoe, a cycling shoe, a football shoe, a tennis shoe, a soccer shoe, a training shoe, a walking shoe, a hiking shoe, and the like. The concepts described herein may also be applied to other footwear types that are considered non-athletic, such as dress shoes, loafers, sandals, and work boots. As used herein, the article of footwear and/or upper assembly may be divided into different general regions. A forefoot region generally includes portions of the article of footwear and/or upper assembly that corresponds to the toes and joints connecting the metatarsals with the phalanges. A midfoot region generally includes portions of the article of footwear and/or upper assembly corresponding with an arch area and an instep area of the foot. A heel region generally corresponds with rear portions of the foot including, the calcaneus bone. The upper assembly and article of footwear described herein may include a lateral side, which corresponds with an outside area of the foot (i.e., the surface that faces away from the other foot), and a medial side, which corresponds with an inside area of the foot (i.e., the surface that faces toward the other foot). The different regions and sides described above are intended to represent general areas of footwear to aid in the following discussion and are not intended to demarcate precise areas. The different regions and sides may be applied to the article of footwear as a whole, to the upper assembly, and to the sole structure.
The term “exterior” as used herein means a surface of the upper assembly or article of footwear that faces the external environment. In some aspects, the exterior surface may mean the outermost surface of the upper assembly or article of footwear. The term “interior” as used herein means a surface of the upper assembly or article of footwear that faces a void for receiving the wearer's foot. In some aspects, the interior surface may mean the innermost surface of the upper assembly or article of footwear.
The term “aperture” as used herein means a hole or perforation that extends through the thickness of a material or layer to form a through-passage. When the term “aperture” is used with respect to a knit construction, the aperture is formed by one or more of altering a knit pattern to intentionally form the aperture or forming the aperture in a post-knitting step by, for instance, punching, melting, dissolving, etc., the knit material. With respect to aspects herein, the term “aperture” does not mean the spaces between interlooped yarns that are inherently and unintentionally formed by the standard knitting process. As used herein, the term “aperture grouping” means two or more apertures that are arranged in a pattern where the pattern may comprise a band of apertures (e.g., one or more lines of apertures), as well as other shapes such as circles, triangles, squares, and the like.
The term “elastic yarn” as used herein refers to yarns (e.g., spandex, thermoplastic polyurethane, elastane, and the like) that stretch in response to a tension force and return to their resting state once the tensioning force is removed. In example aspects, the yarns may stretch from about 100% to 200% of their resting length.
Unless indicated otherwise, all measurements provided herein are taken when the upper assembly and/or article of footwear is at standard ambient temperature and pressure (298.15 K and 100 kPa) and is in a resting (non-tensioned) state.
The knit element 100 has a generally U-shaped configuration that is outlined by a perimeter edge 110, a pair of heel edges 112, and an inner edge 114. When incorporated into an article of footwear, the perimeter edge 110 may be positioned against the upper surface of the sole structure and may be joined to a strobel in example aspects. As such, the perimeter edge 110 may be adjacent a bite line (e.g., bite line 524 of
The knit element 100 includes a toe area 122, a medial side 124, and a lateral side 126. In example aspects, the knit element 100 extends from the throat area 118 to the lower area 111 along at least the medial side 124, the lateral side 126, and the toe area 122. The knit element 100 further optionally includes lace apertures 128 positioned adjacent to the throat area 118 and configured to receive a lace for adjusting the girth of an article of footwear incorporating the knit element 100. In example aspects, the toe area 122 may include one or more structures/yarns that provide reinforcement or rigidity to this area. For example, the toe area 122 may incorporate yarns comprising a thermoplastic elastomer that can be heated and re-solidified to create a thermoformed network of interlooped yarns. In other examples, the toe area 122 may include high-tenacity yarns for abrasion resistance. In yet another example, a polymer skin or other material layer may be applied to the toe area 122 for reinforcement and/or rigidity. Additional ways of imparting reinforcement and/or abrasion resistance to the toe area 122 that are known in the art are contemplated herein.
In example aspects, the knit element 100 includes a first plurality of aperture groupings 130, such as aperture groupings 130a, 130b, and 130c on the medial side 124 of the knit element 100, and aperture groupings 130d, 130e, and 130f on the lateral side 126 of the knit element 100. Each of the aperture groupings 130a-c on the medial side 124 is separated from an adjacent aperture grouping on the medial side 124 by an intervening portion of knit material without apertures, and each of the aperture groupings 130d-f on the lateral side 126 is separated from an adjacent aperture grouping on the lateral side 126 by an intervening portion of knit material without apertures. In this way, aperture groupings 130a-f are visually distinct from one another. The aperture groupings 130a-c extend generally from the throat area 118 to the lower area 111 on the medial side 124, and the aperture groupings 130d-f extend generally from the throat area 118 to the lower area 111 on the lateral side 126. Each of the aperture groupings 130a-f includes a first set of apertures, such as aperture 131, that extends through the thickness of the knit element 100 to form a through-passage. Unlike lace apertures 128, apertures within the first plurality of aperture groupings 130 are not intended to receive a lace.
Each aperture grouping, such as the aperture grouping 130a, includes a first number of apertures per unit area, as indicated by unit area 132. The unit area 132 may be, for example, a 1-by-1-cm square. The apertures 131 may range in size from about 0.5 mm to about 5 mm. As used herein, the term “about” means within ±10% of an indicated value. The depiction of the number of aperture groupings, the spacing of apertures within a given aperture grouping, the number of apertures within a given aperture grouping, the size of individual apertures, and the spacing between adjacent aperture groupings is illustrative, and aspects herein contemplate different configurations.
The tongue 200 is depicted as having a generally T-shaped configuration with a stem 210 and an arm 212. As described below, when incorporated into an article of footwear, the stem 210 of the T-shape of the tongue 200 generally extends across the throat area 118 of the knit element 100 and in a direction toward the ankle opening 116. The arm 212 of the T-shape of the tongue 200 includes a medial arm 214 terminating in a medial arm edge 216 and a lateral arm 218 terminating in a lateral arm edge 220. When the tongue 200 and the knit element 100 are joined or otherwise both incorporated into an upper assembly, the medial arm 214 of the tongue 200 extends to the lower area 111 and/or perimeter edge 110 of the knit element 100 on the medial side 124, and the lateral arm 218 of the tongue 200 extends to the lower area 111 and/or perimeter edge 110 of the knit element 100 on the lateral side 126. In example aspects, the medial arm edge 216 is secured to the lower area 111 and/or the perimeter edge 110 of the knit element 100 on the medial side 124, and the lateral arm edge 220 is secured to the lower area 111 and/or the perimeter edge 110 of the knit element 100 on the lateral side 126. In another example, the medial arm edge 216 and the lateral arm edge 220 of the tongue 200 and the perimeter edge 110 and/or lower area 111 of the knit element 100 are each directly coupled to the strobel or other sole structure, and the tongue 200 and the knit element 100 are not otherwise directly coupled together.
The tongue 200 includes a first surface 222 and an opposite second surface (not shown in
In example aspects, the tongue 200 includes a second plurality of aperture groupings 224, such as aperture groupings 224a, 224b, and 224c on the medial arm 214 of the tongue 200, and aperture groupings 224d, 224e, and 224f on the lateral arm 218 of the tongue 200. Each of the aperture groupings 224a-c is separated from an adjacent aperture grouping on the medial arm 214 by an intervening portion of knit material without apertures, and each of the aperture groupings 224d-f is separated from an adjacent aperture grouping on the lateral arm 218 by an intervening portion of knit material without apertures. The aperture groupings 224a-c extend generally from the stem 210 to an area adjacent the medial arm edge 216 on the medial arm 214, and the aperture groupings 224d-f extend generally from the stem 210 to an area adjacent the lateral arm edge 220 on the lateral arm 218.
Each of the aperture groupings 224a-f includes a second set of apertures, such as aperture 226, that extends through the thickness of the tongue 200 to form a through-passage. Unlike lace apertures 128, the apertures within the second plurality of aperture groupings 224 are not intended to receive a lace. Each aperture grouping, such as the aperture grouping 224d, includes a second number of apertures per unit area, as indicated by the unit area 132. In example aspects, the second number of apertures per unit area in the tongue 200 is greater than the first number of apertures per unit area of the knit element 100. The apertures 226 may range in size from about 0.5 mm to about 5 mm and may be the same or a different size than the apertures 131. The depiction of the number of aperture groupings, the spacing of apertures within a given aperture grouping, the size of the apertures, the number of apertures within a given aperture grouping, and the spacing between adjacent aperture groupings is illustrative, and aspects herein contemplate different configurations. As explained in greater detail below with reference to
The arm 212 of the tongue 200 may include a central portion 228 between the medial arm 214 and the lateral arm 218. When arranged with the knit element 100 to form the upper assembly, the central portion 228 of the arm 212 may be located in the throat area 118 and thus may form a portion of the exterior surface of the upper assembly. For example, when arranged with the knit element 100, the knit element 100 may cover the medial arm 214 and the lateral arm 218 of the tongue 200, while the central portion 228 may be not covered by the knit element 100 such that the central portion 228 may form an exterior surface of the upper assembly.
In example aspects, the central portion 228 may also include aperture groupings such as aperture groupings 230a, 230b, and 230c, each of which comprises apertures that extend through the thickness of the tongue 200. In example aspects, the aperture grouping 230a may be linearly aligned with the aperture groupings 224a and 224d, the aperture grouping 230b may be linearly aligned with the aperture groupings 224b and 224e, and the aperture grouping 230c may be linearly aligned with the aperture groupings 224c and 224f along the length of the arm 212. Other aspects contemplate that the aperture groupings 230a-c may not be linearly aligned with the aperture groupings 224a-f. Any and all aspects, and any variation thereof, are contemplated as being within the scope herein. Because the throat area 118 of the upper assembly comprises a single layer of material (i.e., the central portion 228 of the tongue 200), the aperture groupings 230a-c form a fluid communication path between an interior of the upper assembly and the external environment and provide for an additional egress point for heat and moisture to be exhausted to the external environment. In other examples, the tongue 200 includes apertures only on the medial arm 214 and lateral arm 218, where the central portion 228 lacks apertures.
In example aspects, the central portion 228 may optionally include one or more lace tunnels 232. The lace tunnel 232, for example, may be integrally knit in that it is formed by coextensive knit layers within the tongue 200, where the knit layers are at least partially separable to create the lace tunnel 232. A portion of the lace extending over a central portion of the tongue 200 may extend through the lace tunnel 232, which may help maintain proper placement of the lace. While
The horizontal bar 254 corresponds to the arm 212 of the tongue 200 and includes the aperture groupings and the optional loop(s) discussed above with respect to the tongue 200. For brevity's sake, the discussion regarding the aperture groupings will be omitted with respect to the tongue 250.
The medial arm 214 and the lateral arm 218 of the tongue 200 are positioned interior to the knit element 100 and extend from the throat area 118 to the lower area 111 of the knit element 100 along each of the medial side 124 and the lateral side 126. In example aspects, the medial arm 214 and the lateral arm 218 are generally located in a midfoot region of the upper assembly 300 and help to provide support to the area of the wearer's foot located in the midfoot region. For example, the medial arm 214 and the lateral arm 218 may provide support to the instep area and the lateral and medial sides of the wearer's foot in the midfoot region. Moreover, having multiple layers of material (i.e., at least one layer from the knit element 100 and at least one layer from the tongue 200) in the midfoot region of the upper assembly 300 increases resistance to abrasion and may help to limit stretch and wear-and-tear, thereby increasing the useable life of an article of footwear incorporating the upper assembly 300. The medial arm 214 and the lateral arm 218 of the tongue 200 form a portion of the interior surface of the upper assembly in the midfoot region. Remaining portions of the interior surface of the upper assembly 300 are generally formed by the second surface of the knit element 100.
In example aspects, the tongue 200 may be selectively secured to the knit element 100. For example, the medial arm edge 216 of the tongue 200 may be secured to the perimeter edge 110 of the knit element 100 on the medial side 124 of the upper assembly 300, as indicated by the “X” marks 314. The lateral arm edge 220 of the tongue 200 may be secured to the perimeter edge 110 of the knit element 100 on the lateral side 126 of the upper assembly 300, as also indicated by the “X” marks 314. In further example aspects, additionally or alternatively to securement along the perimeter edge 110, the tongue 200 may be secured to the knit element 100 at a forward portion 316 of the throat area 118, as indicated by the “X” marks 314. The securing of the tongue 200 to the knit element 100 may be through stitching, bonding, welding, adhesives, and the like. In example aspects, remaining portions of the tongue 200 are not directly secured to the knit element 100. The result is that the unsecured portions of the tongue 200 are able to shift relative to the knit element 100. This may be helpful in reducing tension forces on the skin of the wearer's foot during use, especially during athletic movements that may result in a sudden change in direction. Additionally, having remaining portions of the tongue 200 unsecured relative to the knit element 100 provides greater flexibility in positioning the tongue 200 when a wearer is donning footwear incorporating the tongue 200 and knit element 100.
As depicted, the tongue 200 is positioned interior to the lace apertures 128 of the knit element 100. When a lace (not shown in
As depicted in
As stated above, aspects herein contemplate that there are a greater number of apertures per unit area in the second plurality of aperture groupings 224 compared to the first plurality of aperture groupings 130. This may serve several purposes. For example, the greater number of apertures per unit area in the second plurality of aperture groupings 224 increases the likelihood that at least a portion of the apertures 226 are axially aligned with at least a portion of the apertures 131, even when the tongue 200 shifts relative to the knit element 100. Having a fewer number of apertures per unit area on the knit element 100 versus the tongue 200 enables the knit element 100 to be more effective in preventing environmental debris (e.g., dust, pebbles, rain, etc.) from entering into the interior of the upper assembly 300. Moreover, having a fewer number of apertures per unit area on the knit element 100 versus the tongue 200 may increase the structural integrity and durability of the knit element 100 due to an increased number of interlooped yarns per unit area. This may be particularly important when considering the knit element 100 forms a majority of the exterior surface of the upper assembly 300.
The positioning of the horizontal bar 254 and the proximal portion 256 of the vertical bar 252 is similar to the tongue 200. As depicted, the distal portion 258 of the vertical bar 252 extends into the toe area 122 of the knit element 100 and is positioned internal to the knit element 100. This construction may provide additional reinforcement and increase the durability of the toe area 122 of the upper assembly 350.
Like the tongue 200, the tongue 250 may be secured to the knit element 100 at the lower area 111 and/or perimeter edge 110 on the medial side 124 and on the lateral side 126, and may be further secured to the knit element 100 at a forward portion 352 of the throat area 118, as illustrated by the “X” marks 354. Aspects herein contemplate that the distal portion 258 of the tongue 250 may be secured to the lower area 111 and/or perimeter edge 110 of the knit element 100 in the toe area 122, as further indicated by the “X” marks 354. Remaining areas of the tongue 250 may not be secured to the knit element 100 to allow for some shifting between the tongue 250 and the knit element 100 during wearer movement.
As described, the tongue 200 is selectively secured to the knit element 100 at the lower area of the upper assembly 300 on each of the medial side 520 and the lateral side 522, as shown by the “X” marks 314. In example aspects, the securement location between the tongue 200 and the knit element 100 may correspond approximately (e.g., within ±1 cm to 2 cm) to a bite line 524 of the article of footwear 500. As used herein, the term “bite line” is the edge where the upper assembly 300 and a sole structure 510 intersect on the finished article of footwear 500. The tongue 200 may be further secured to the knit element 100 at the forward portion 316 of the throat area 118, while remaining areas of the tongue 200 may not be directly secured to the knit element 100 to allow for shifting between the two layers during wearer movement.
As described, the configuration of the tongue 200 and its selective attachment to the knit element 100 provides additional and adjustable support and stability to the medial side 520 and the lateral side 522 of the article of footwear 500 in at least the midfoot region 514 of the article of footwear 500. Further, the extra layer of material provided by the tongue 200 in the midfoot region 514 may increase the overall durability and resistance to wear-and-tear of the article of footwear 500.
Although not depicted, an article of footwear incorporating the tongue 250 in combination with the knit element 100 is contemplated herein and would have a similar configuration as the article of footwear 500, and would additionally include the distal portion 258 of the tongue 250 in the toe area 122.
At a step 616, the shoe last 612 is inverted and a strobel 618 is stitched to the perimeter edge 110 of the knit element 100, as depicted by stitch line 620. In example aspects, the strobel stitch (e.g., the stitch line 620) may also be used to secure the medial arm edge 216 and the lateral arm edge 220 of the tongue 200/250 to the lower area 111 and/or the perimeter edge 110 of the knit element 100. A sole structure, such as the sole structure 510 may then be secured to the upper assembly 300 to form the article of footwear 500. In an additional step, not depicted, the tongue 200/250 may be further secured to the knit element 100 at the forward portion 316 of the throat area 118. When the tongue has the configuration of the tongue 250, the strobel stitch (e.g., the stitch line 620) may also be used to secure the distal portion 258 of the vertical bar 252 of the tongue 250 to the toe area 122 of the knit element 100. When the tongue has the configuration of the tongue 200, a separate stitch or coupling mechanism may be used to secure a forward edge 215 of the arm 212 of the tongue 200 to the forward portion 316 of the throat area 118 of the knit element 100. Other ways of securing the knit element 100 and the tongue 200/250 to form the upper assembly 300 are contemplated as being within aspects herein.
The following clauses represent example aspects of concepts contemplated herein. Any one of the following clauses may be combined in a multiple dependent manner to depend from one or more other clauses. Further, any combination of dependent clauses (clauses that explicitly depend from a previous clause) may be combined while staying within the scope of aspects contemplated herein. The following clauses are examples and are not limiting.
Clause 19. The upper assembly according to any of clauses 10 through 18, wherein the knit element comprises a plurality of lace apertures adjacent the throat area.
Aspects of the present disclosure have been described with the intent to be illustrative rather than restrictive. Alternative aspects will become apparent to those skilled in the art that do not depart from its scope. A skilled artisan may develop alternative means of implementing the aforementioned improvements without departing from the scope of the present disclosure.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims. Not all steps listed in the various figures need be carried out in the specific order described.
This application is a continuation of co-pending U.S. patent application Ser. No. 18/510,117, filed on Nov. 15, 2023, and titled “ARTICLE OF FOOTWEAR INCORPORATING AN UPPER ASSEMBLY,” which claims the benefit of U.S. provisional app. No. 63/426,515, filed on Nov. 18, 2022. Both of these applications are incorporated herein by reference in the entirety.
Number | Date | Country | |
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63426515 | Nov 2022 | US |
Number | Date | Country | |
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Parent | 18510117 | Nov 2023 | US |
Child | 19096287 | US |