WO2020257850A1 - Procédé et structure de fabrication de chaussure de danse - Google Patents

Procédé et structure de fabrication de chaussure de danse Download PDF

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Publication number
WO2020257850A1
WO2020257850A1 PCT/AU2020/050638 AU2020050638W WO2020257850A1 WO 2020257850 A1 WO2020257850 A1 WO 2020257850A1 AU 2020050638 W AU2020050638 W AU 2020050638W WO 2020257850 A1 WO2020257850 A1 WO 2020257850A1
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WO
WIPO (PCT)
Prior art keywords
shoe
section
reinforcing structure
arch
heel
Prior art date
Application number
PCT/AU2020/050638
Other languages
English (en)
Inventor
Timothy Charles Heathcote
Original Assignee
Muse Dancewear Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2019902214A external-priority patent/AU2019902214A0/en
Application filed by Muse Dancewear Pty Ltd filed Critical Muse Dancewear Pty Ltd
Priority to CN202080059971.7A priority Critical patent/CN114286629A/zh
Publication of WO2020257850A1 publication Critical patent/WO2020257850A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/12—Dancing shoes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A43B13/41—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process combined with heel stiffener, toe stiffener, or shank stiffener
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/088—Heel stiffeners
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/16—Heel stiffeners; Toe stiffeners made of impregnated fabrics, plastics or the like
    • A43B23/17—Heel stiffeners; Toe stiffeners made of impregnated fabrics, plastics or the like made of plastics
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/22—Supports for the shank or arch of the uppers
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/002—Mountain boots or shoes
    • A43B5/003—Mountain boots or shoes for free climbing
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/026—Laminated layers

Definitions

  • the reinforcing structure extends through the arch section and into the forefoot section. In some embodiments, the reinforcing structure comprises a semi rigid material. In some embodiments, the reinforcing structure has a thickness of between 2 mm and 4 mm.
  • the first board extends into the forefoot section to be under the ball of the wearer’s foot. In some embodiments, the first board extends through the heel section. In some embodiments, the reinforcing structure is further supported by a second board connected to the first board. Some embodiments of the first board and the second board are made from a pulp board material.
  • the reinforcing structure comprises a material selected from the group consisting of: non-woven bonded synthetic fibrous materials; counter materials; fiber boards; sponge rubber; natural rubber; neoprene; styrene-butadiene rubber (SBR); butyl rubber; silicone rubber; nitrile rubber; urethane rubber; polyurethane foam; cork; cellulosic materials; ethylene vinyl acetate (EVA) foam; polyethylene foam; cross-linked polyethylene foam; high density micro -cellular foam; and closed cell polyvinyl chloride foam.
  • EVA foam ethylene vinyl acetate
  • Some embodiments of the EVA foam have a density of about 30 kg/m3 to about 120 kg/m3.
  • connecting the opposing halves of the shoe upper along the matching concave edges of the reinforcing structure forms a shoe with a heel section, a concave arch section, and a forefoot section.
  • Some embodiments of the method further comprise attaching a front outsole to the forefoot section and a rear outsole to the heel section.
  • the embodiments described herein introduce a semi-rigid but still flexible reinforcing structure to heel and arch components of split sole shoes.
  • described embodiments allow a full range of motion required by a dancer and introduce a semi-rigid reinforcing material that can move with the foot, and ensure that the soft materials that make up the shoe upper remain smooth, and are displaced evenly, thereby eliminating or substantially reducing the appearance of any creasing, bunching, puckering and/or sagging of materials.
  • This flexible reinforcing structure results in an unbroken formation along the line of the foot when the foot is in motion.
  • Figure 4B shows a bottom view of the ballet slipper of Figure 1
  • Figure 4C shows an alternative top view of the ballet slipper of Figure 1;
  • Figure 4D shows a further alternative top view of the ballet slipper of Figure 1;
  • Figure 5 shows a perspective view of the reinforcing structure of the ballet slipper of Figure 1;
  • Figure 6 shows a single support panel of the ballet slipper of Figure 1 in further detail
  • Figure 7A shows the ballet slipper of Figure 1 in an unassembled state
  • Figure 7B shows an intermediate assembly step of the ballet slipper of Figure 6A
  • Figure 9A shows a side and bottom view of the ballet slipper of Figure 1 showing the placement of an embodiment of a support structure
  • Figure 9B shows a side and bottom view of the ballet slipper of Figure 1 showing the placement of another embodiment of a support structure
  • Figure 9C shows the placement of some embodiments of a support structure on the ballet slipper of Figure 1 in an unassembled state
  • Figure 10A shows an example pattern piece for the support panels of the ballet slipper of Figure 1 in a small child size
  • Figure 10B shows an example pattern piece for the support panels of the ballet slipper of Figure 1 in a large adult size.
  • Described embodiments may improve the aesthetic appearance of a shoe undergoing movement due to foot and ankle flexion, may provide increased support for the foot undergoing movement and may offer beneficial or therapeutic resistance to the person performing the activity.
  • Typical footwear consists of two primary elements, an upper and a sole structure.
  • the upper provides a covering for the foot that securely receives and positions the foot with respect to the sole structure.
  • the sole structure is secured to a lower portion of the upper and is generally positioned between the foot and the ground.
  • the sole structure, in conjunction with the upper ideally should provide support and comfort for the bottom of the foot and the arch.
  • a dance shoe is designed to complement a dancer’s wide range of movement and is therefore typically made up of lightweight, flexible materials. As the design is focused on the upper and sole structures being extremely flexible, these structures typically provide little support for the foot. These shoes typically permit the user to easily flex the ankle and arch region of the foot but to the detriment of ankle and arch support.
  • a shoe that is allowed to bend and flex will have a side effect of creasing, bunching, puckering and sagging in the upper and outsole materials, creating an unwanted distraction from the clean lines ideally sought.
  • Dance is a strict and regimented art form, and any visual distraction from the ideal aesthetic framework will have an adverse effect on the dancer’s performance in general.
  • the creasing, bunching, puckering and sagging caused by a flexible shoe can cause a dancer to feel ungainly and unsupported, further affecting their performance.
  • Figures 1 and 2 show a dance shoe 100 in the form of a slipper according to some embodiments.
  • the shoe 100 comprises a shoe upper 102 defining an opening 104 to receive a wearer’s foot, and an outsole region 106 to underlie a sole of the foot.
  • Outsole region 106 in combination with upper 102 define a heel section 110, an arch section 120 and a forefoot section 130 of the shoe 100.
  • the shoe 100 additionally comprises a reinforcing structure 140 coupled to the shoe upper 102 and the outsole region 106 and extending from adjacent the opening 104 in an upper heel portion 112 of the heel section 110 around a lower heel portion 114 of the heel section 110 and through the arch section 120 along a longitudinal direction of the shoe 100.
  • the longitudinal direction of the shoe 100 generally corresponds to the longitudinal direction of the wearer’s foot.
  • the reinforcing structure 140 broadens from adjacent the opening 104 to substantially cup a lower posterior portion of a wearer’s calcaneus and then narrows toward the arch section 120.
  • the reinforcing structure 140 is biased to form a concave shape in the arch section 120, so that the reinforcing structure 140 in the arch section 120 closely matches the natural curvature of the wearer’s arch while substantially maintaining a smooth appearance of the shoe upper 102 in the arch section 120.
  • the reinforcing structure 140 may also extend slightly or substantially into the forefoot section 130.
  • the upper 102 may be formed as one piece stitched together through the heel and outsole, or be formed from more than one piece of material. If the upper 102 is formed of one piece of material, then it extends around under portions of the heel, arch and forefoot sections 110, 120, 130 to form part of the outsole region 106. This may also be the case where the upper 102 is made up of more than one piece of material.
  • the upper 102 may be made of a suitable flexible, durable material, for example such as leather, polyurethane (PU) leather, canvas, suede, cotton, nylon, Lycra, neoprene, spandex, or mesh materials (for example, polyester mesh, nylon mesh, spandex mesh, cotton mesh).
  • the upper material or materials selected may have stretch or non- stretch properties depending on the desired fit, aesthetic, or performance of the shoe 100.
  • the reinforcing structure 140 is connected to the upper 102 and the outsole region 106, specifically to an upper heel portion 112 of the heel section 110 and travelling down through a mid-heel portion 113, around a lower heel portion 114 through the heel/rear outsole portion 108. These components combine to give the shoe 100 structural support with a smooth external finish, and substantially reduce or prevent wrinkling of the upper 102 so that the shoe 100 is form fitting.
  • the reinforcing structure 140 may be connected to the upper 102 and the outsole region 106 with glue or stitching, or a combination of glue and stitching.
  • the connection of the reinforcing structure 140 to the upper 102 and the outsole region 106 comprises a stitch line 141 which runs just inside the edge of the reinforcing structure 140.
  • Embodiments of the reinforcing structure 140 comprise a semi-rigid material which has qualities that, when connected to embodiments of the shoe 100, provide flexible reinforcement and structural support to an otherwise soft and flexible shoe 100.
  • the outsole region 106 includes ground-engaging surfaces of the shoe, and may comprise a single continuous outsole piece or multiple outsole pieces. Multiple outsole pieces, also known as a“split sole” arrangement, may comprise separate outsoles in the heel and forefoot sections, for example.
  • Figures 1 and 2 show an embodiment of the shoe 100 comprising a rear outsole 108 in the heel section 110 and a front outsole 109 in the forefoot section 130.
  • the outsole pieces can be made of materials such as suede, leather, PU, thermoplastic rubber (TPR), vulcanised rubber, EVA foam or other shock absorbing materials. Furthermore, the outsole pieces can be made up of combinations of these materials in either single or multiple layers.
  • a binding 105 extends around an upper rim of the upper 102 to define the opening 104 through which the foot is received in the top of shoe 100.
  • the binding 105 can be made up of a cotton non-stretch material with cotton drawstring, a cotton non-stretch material with elastic drawstring or an elastic binding with no drawstring.
  • the binding 105 may be stitched, glued or otherwise affixed to the upper 102 and optionally also to the upper heel portion 112 of the reinforcing structure 140.
  • Figure 2 shows the shoe 100 in a pointed position. In this position, the foot muscles are contracted and the foot can be up to 20% shorter.
  • the reinforcing structure 140 is shown as a striped area, although in the embodiments shown reinforcing structure 140 is not visible without looking inside shoe 100.
  • Figure 2 shows how the stitches 141 connect the reinforcing structure 140 to the shoe 100, and further shows the reinforcing structure 140 extending from the heel section 110 through the rear outsole 108 and into the arch section 120, connecting to the forefoot section 130.
  • A“cup” shape formed by the reinforcing structure 140 in the heel section 110 and the flexible arch section 120 provides a shoe 100 which maintains a visually smooth, clean line, with minimal wrinkling, bunching or puckering of fabric, even when the foot is in a pointed position.
  • the rear and front outsoles 108, 109 are connected to the upper 102 and the reinforcing structure 140.
  • the outsoles 108, 109 may be stitched or glued in place.
  • a toe area of the forefoot section 130 may have a pleating arrangement 132 which shapes the material of upper 102 around the wearer’s toes.
  • the reinforcing structure 140 shall be described in more detail. Starting at the binding 105 at the top of the heel section 110, the reinforcing structure 140 progresses from the upper heel portion 112 through the mid-heel portion 113. In some embodiments of the shoe 100, when worn, the reinforcing structure 140 covers part of the back of the wearer’s heel and is at least wide enough to extend around the wearer’s Achilles tendon and/or ankle bone.
  • the reinforcing structure 140 continues through the mid-heel portion 113 towards the lower heel portion 114, which corresponds to the sole of the wearer’s heel.
  • the reinforcing structure 140 gets wider as it travels through portions 113, 114, and forms a cup shape that is configured to wrap around a lower posterior part of the wearer’s heel bone (calcaneus).
  • This transition from Achilles to sole and the corresponding gradual width increase in the reinforcing structure 140 through heel section 110 is intended to serve as a gradual increase in the rigidity of the heel section 110 as the reinforcing structure 140 approaches the sole of the foot.
  • the rigidity level is selected to provide flexibility, softness and ease of movement while still providing the wearer with support, resistance, and proprioceptive feedback.
  • the reinforcing structure 140 As the reinforcing structure 140 approaches the arch section 120, the shape changes to roughly mimic the transitional contours of the arch of a human foot. This requires a narrowing of the reinforcing structure 140 via a heel-arch transitional portion 160 as it is necessary to avoid excessive material in the arch section 120.
  • the reinforcing structure 140 comprises the heel-arch transitional portion 160, which changes from the cup shape around the heel section 110 to a narrow portion 122 in the arch section 120.
  • the narrow portion 122 which in some embodiments may be elongate to resemble a strip of material, provides reduced resistance compared to the cup shape in the heel section 110, and makes it easier for the wearer’s foot to bend naturally.
  • the reinforcing structure 140 it is desired for the reinforcing structure 140 to stay wide enough in the arch section 120 to offer support and controlled resistance, as this affects the level of tactile feedback or proprioception experienced by the wearer. If the reinforcing structure 140 is too wide in the arch section 120, it would maintain the“cup” shape as seen in the heel section 110, and this would reduce flexibility through the arch section 120.
  • the lateral width of the lower heel portion 114 of the reinforcing structure 140 may be between around 1.8 and 3 times the lateral width of the narrow portion 122 through the arch section 120.
  • the shoe 100 further comprises a backstrap 107. The backstrap 107 further secures the reinforcing structure 140 to the upper 102.
  • the backstrap 107 spans the heel section 110 from the opening 104 through to the arch section, running underneath the rear outsole 108.
  • the backstrap 107 may further continue into the arch section 110, ending at front outsole 109.
  • the backstrap 107 may be made from the same material as the upper 102 or it can be made of other stretch or non-stretch materials, woven or non-woven material types, including the same material used for the binding 105.
  • the shoe 100 may further comprise securing means to help keep the shoe 100 connected to the wearer’s foot and/or provide adjustability of the fit of shoe 100.
  • These securing means may include an elastic strap attachment 146, which comprises at least one elastic strap coupled to the shoe upper 102 and extending across the opening 104.
  • the at least one strap may be arranged to overlie tarsal bones of the wearer’s foot when the shoe 100 is worn, and may be configured to apply tension primarily to the arch section 120 and minimal or no tension to the heel section 110.
  • the elastic strap attachment 146 may in some embodiments be made up of two parts in an“X shape” arrangement, or as a single strap, and may additionally be adjustable.
  • the two part“X-shape” arrangement provides additional connection between the heel section 110, the arch section 120, and/or the forefoot section 130 of the shoe 100.
  • the X shape arrangement connects the medial side of the heel section 110 with the lateral side of the arch or forefoot section 120, 130, and connects the lateral side of the heel section 110 with the medial side of the arch or forefoot section 120, 130.
  • this links all portions of the shoe upper 201 with each other across the top of the foot.
  • laces can be used in addition to or as a replacement for straps 146.
  • only a single strap may be provided, extending across the foot opening 104 defined by the upper 102 and coupling to the upper 102 adjacent the upper rim of the upper 102, similar to the location of binding 105.
  • the single strap may be positioned to generally coincide with the arch section 120 or with the heel-arch transition portion 160 between the heel section 110 and the arch section 120.
  • the shoe may further comprise a lining 103, a front insole 138, and a rear insole 118 to improve comfort for the wearer.
  • the lining 103 may comprise different stretch and non-stretch materials, such as canvas, leather, PU, Lycra, mesh, neoprene, cotton, for example.
  • the lining 103 may also comprise buoyant materials such as foams and its variants and rubbers and its variants.
  • the lining 103 may be quite light and thin, with a soft feel to it to provide comfort while reducing the bulk of the shoe 100.
  • the reinforcing structure 140 may be positioned on top of or underneath the lining 103, or in between the lining 103 and the upper 102. In some embodiments it may be desired to conceal the reinforcing structure 140, or place the reinforcing structure 140 to be visible, for example on the outside of the upper 102.
  • the shape of the rear and front insoles 118, 138 would normally match the general shape of the rear and front outsoles 108, 109.
  • the rear and front insoles 118, 138 are connected to one or more of the upper 102, the lining 103, and the reinforcing structure 140, for example by stitching or by an adhesive.
  • the connection created by combining the reinforcing structure 140 to the shoe 100 is significant as this means that the shoe 100 is semi-rigid but flexible between the heel section 110, the outsoles 108, 109, and the arch section 120.
  • the reinforcing structure 140 provides structure to the shoe 100, helping the upper 102 to maintain its shape and clean lines during movement and contributing to the form fitting appearance and shape of the shoe 100.
  • the reinforcing structure 140 also allows the shoe 100 to support the wearer’s foot and ankle, by maintaining a semi-rigid body of material against the foot and in turn offering controlled resistance for muscle activity.
  • the shape and positioning of the reinforcing structure 140 is also significant to achieving the desired structural and aesthetic effects. As disclosed herein, the reinforcing structure 140 may in some embodiments provide advantages such as proprioceptive feedback to the wearer.
  • Figures 4A and 4B show top and bottom views respectively of the shoe 100, and in particular, show the shape and position of the reinforcing structure 140 in relation to the shoe 100. For clarity, straps 146 are not shown.
  • Figure 4A is the view looking inside the shoe 100.
  • the reinforcing structure 140 is visible in Figure 4A, and in this embodiment of the shoe 100 reinforcing structure 140 is attached to upper 102 by stitching along or close to the edges of the reinforcing structure 140.
  • the stitches form a stitch line 141 which generally follows the profile of the reinforcing structure 140.
  • Figure 4B which is a view of the bottom of the shoe 100 as viewed from the outside, the reinforcing structure 140 is not visible.
  • FIGS 4C and 4D are alternative top views of Figure 4A according to alternative embodiments, and indicate the positioning of the reinforcing structure 140 in relation to the rest of the shoe 100, as if the upper 102 was transparent.
  • the reinforcing structure 140 narrows as it transitions from the heel section 110 into the arch section 120 via the heel- arch transitional portion 160.
  • the reinforcing structure 140 extends into the forefoot section 130 from the arch section 120, the reinforcing structure 140 comprises an arch-forefoot transitional portion 170 which extends to meet the front outsole 109.
  • the reinforcing structure 140 splays or widens in the arch-forefoot transitional portion 170 from the narrow portion 122 into a Y-shaped configuration, wherein portions of the arch-forefoot transitional portion 170 extend at least partially around the sides of the front outsole 109, as best shown by Figure 4C.
  • the reinforcing structure 140 gradually widens to about 1.5 to 3 times the width of the narrowest part of reinforcing structure 140.
  • the gradual widening provided by the arch-forefoot transition portion 170 reduces wrinkling, puckering and bunching of surrounding materials of the upper 102, and also improves the connection between the forefoot section 130 and the arch section 120, which may have advantages in improving the overall torsional stiffness of the shoe
  • the reinforcing structure 140 splays or widens in the arch-forefoot transitional portion 170 from the narrow portion 122 and extends to substantially cover the forefoot section 130, extending to the edges of front outsole 109, as best shown by Figure 4D. Having reinforcing structure 140 extend to cover substantially all of front outsole 109, such that reinforcing structure extends under the forefoot and the ball of the foot of the wearer, may have advantages, such as helping to keep front outsole 109 smooth under the foot, and acting as a shock absorber under the ball of the foot of the wearer.
  • the length of the narrow portion 122 affects the transition in the heel-arch transitional portion 160 and/or the arch forefoot transitional portion 170. If the narrow portion 122 spans substantially the length of the arch region 120, this shortens the length of the transitional portions 160, 170, whereas a shorter narrow portion 122 results in transition portions 160, 170 being longer. Longer transition portions 160, 170 allow the change in width in these portions to occur more gradually over the length of the foot, and because of the shorter narrow portion 122, may improve the bending stiffness of the arch section 120 and its ability to provide arch support to the wearer when the wearer’s foot is in a pointed position. Furthermore, this configuration may improve the torsional stiffness of the arch section 120 and may consequently result in a reduction in lateral twisting of the wearer’s foot and ankle.
  • the reinforcing structure 140 comprises a heel portion 142, an arch portion 143, and a forefoot portion 144.
  • the heel portion 142 corresponds to the heel section 110 of the shoe 100
  • the arch portion 143 corresponds to the arch section 120 of the shoe 100
  • the forefoot portion 144 corresponds to the forefoot section 130 of the shoe 100.
  • forefoot portion 144 has extensions 145 which extend either side of the front outsole 109 in a generally Y-shaped configuration.
  • the reinforcing structure 140 comprises a convex shape as seen from the outside of the shoe in the heel portion 142 to cup around the wearer’s heel. Reinforcing structure 140 transitions to a concave shape as seen from the outside of the shoe in the arch portion 143 to support the wearer’s arch. In some embodiments, the concave shape of the reinforcing structure 140 in the arch portion 143 extends substantially into the forefoot portion 144. By extending the concave shape substantially into the forefoot portion 144, the forefoot portion 144 of the reinforcing structure 140 is biased to be generally aligned with the wearer’s sole when their foot is pointed, for example as shown in Figure 2.
  • the reinforcing structure 140 is sufficiently flexible so that when the wearer places weight on the forefoot portion 144 (for example, in demi-pointe), the concave shape that extends into the forefoot portion 144 is able to bend in a convex shape to maintain the same (or similar) smooth and streamlined appearance when the wearer points their foot.
  • the reinforcing structure 140 may be biased to transition from the concave section in the arch portion 143 to a slightly convex shape in the forefoot portion
  • this embodiment of the reinforcing structure 140 has an undulating profile as it changes from a convex profile in the heel, to a concave profile in the arch, and again to a slightly convex profile in the forefoot.
  • the undulating profile changes from a convex profile in the heel to a concave profile in the arch through a first inflection point, the location of which corresponds generally to the heel-arch transitional portion 160.
  • the first inflection point may approximately be in line with the wearer’s ankle.
  • the undulating profile changes from a concave profile in the arch to a slightly convex profile in the forefoot through a second inflection point, the location of which corresponds generally to the arch-forefoot transitional portion 170.
  • the second inflection point may approximately be in line with the ball of the wearer’s foot.
  • the reinforcing structure 140 is formed from a plurality of pieces, wherein each of the plurality of pieces is referred to as a support panel 150.
  • Each support panel 150 may be the same size and/or shape, and may be made of the same material. Alternatively, different sizes, shapes, and/or materials of support panel 150 may be combined to adjust the properties of the reinforcing structure 140.
  • Figure 5 shows an embodiment of the reinforcing structure 140 which comprises two support panels 150, being support panels 150A and 150B, joined by stitch line 148.
  • the support panels 150 are arranged so that one of panels 150 corresponds to the medial side of the wearer’s foot, and the other of panels 150 corresponds to the lateral side of the wearer’s foot.
  • the medial side support panel 150A and the lateral side support panel 150B may be identical or mirror images of each other.
  • the support panel 150 on the medial side may be different to the support panel 150 on the lateral side.
  • panel 150A which like panel 150B, is a flat piece prior to being connected to form the reinforcing structure 140.
  • panel 150A and panel 150B are at least substantially identical in shape and size.
  • the panel 150A comprises a first edge 151A which comprises first heel edge 152A, first arch edge 153A, and first forefoot edge 154A. When positioned within shoe 100, first edge 151 A runs along the central longitudinal axis of outsole region 106.
  • the first heel edge 152A corresponds to the heel portion 142 of the reinforcing structure 140, and connects to the first arch edge 153A which corresponds to the arch portion 143 of the reinforcing structure 140.
  • the first arch edge 153A connects to the first forefoot edge 154A, which corresponds to the forefoot portion 144 of the reinforcing structure 140.
  • the first forefoot edge 154A may also comprise an extension edge 155A that corresponds to the extensions 145 of the reinforcing structure 140 which extend either side of the front outsole 109 in a generally Y-shaped configuration.
  • the first edge 151 A has an undulating profile that corresponds to the undulating profile of the reinforcing structure 140 shown in Figure 5.
  • the first heel edge 152A comprises a convex shape
  • the first arch edge 153A comprises a concave shape.
  • the first edge 151 A transitions between the convex and concave shapes via an inflection point, the location of which generally corresponds to the location of the heel-arch transitional portion 160 and may approximately be in line with the wearer’s ankle.
  • the first forefoot edge 154A may also have a concave shape, and the first edge 151 A may transition between the concave shapes via an inflection point, the location of which generally corresponds to the location of the arch-forefoot transitional portion 170 and may approximately be in line with the ball of the wearer’ s foot.
  • the panel 150A further comprises a second edge 156A, which comprises second heel edge 157A, second arch edge 158A, and second forefoot edge 159A.
  • the second heel edge 157A corresponds to the heel portion 142 of the reinforcing structure 140, and connects to the second arch edge 158 A which corresponds to the arch portion 143 of the reinforcing structure 140.
  • the second heel edge 157A comprises concave and convex shapes and transitions between the concave and convex shapes via inflection points.
  • the distance between the first and second heel arch edges 152A and 157A may narrow approaching the heel-arch transitional portion 160.
  • the distance may widen in the heel-arch transitional portion 160 to provide sufficient cupping of the wearer’s heel.
  • the heel-arch transitional portion 160 may narrow approaching the arch portion 143 to provide flexibility in the arch as previously described.
  • the distance between the first and second edges 151 A and 156A generally remains constant, so that the first and second arch edges 153A and 158A may be substantially parallel.
  • the distance begins to increase through the arch-forefoot transitional portion 170 as the first and second edges 151 A and 156A diverge to provide greater support underneath the wearer’ s forefoot.
  • the panel 150B also comprises a first edge 15 IB which comprises heel edge 152B, a second edge 156B, and so on, with like reference numbers relating to like components.
  • the panels 150, 150A, 150B may be formed of various different materials. Some particular embodiments comprise EVA foam.
  • Such materials may further comprise rubber, such as natural rubber or a synthetic rubber (although synthetic rubber is preferred), in combination with the EVA foam.
  • the EVA foam and rubber may be provided in roughly equal proportions or the material may consist of 40% to 60% EVA, 40% to 60% rubber and 0% to 20% other materials. In some embodiments, different proportions of EVA and rubber may be employed, with ranges of one of those components extending up to say 80% or 90%, with the remainder comprising the other component or other materials. In some embodiments, EVA foam may be used without any rubber.
  • Figures 7A, 7B, and 7C schematically illustrate some of the steps of an example manufacturing and assembly process of shoe 100, including the application of the reinforcing structure 140 as recited in relation to some embodiments of shoe 100. Similar principles of construction apply to the different embodiments of shoe 100 described herein.
  • the upper 102 is cut as a flat pattern comprising opposing halves, to which the lining 103 is then applied.
  • the panels 150A and 150B (for example, as shown in Figure 6) are then attached to the upper 102 and lining 103 (not shown) to arrive at the piece shown in Figure 7A.
  • panels 150A and 150B are identical and mirror images of each other, and are attached to medial and lateral sides of the upper.
  • the panels 150A, 150B may be attached by either gluing or stitching the panels 150A, 150B to the lining 103 or upper 102, or by a combination of gluing and stitching.
  • Figure 7A shows the panels 150A, 150B attached to the upper 102 by the stitch line 141, which sits along or adjacent to the second edges 156A, 156B.
  • Figure 7B shows an intermediate step in the assembly process, wherein the two panels 150A and 150B are brought towards each other (as indicated by the dashed arrows) to be connected by folding the piece of Figure 7 A along a longitudinal axis of the shoe 100.
  • the axis generally corresponds to the elongate axis of the wearer’s foot.
  • the panels 150A and 150B are connected along their first edges 151 A, 15 IB, and may be connected by stitching such as by a centre stitch 148 to form the reinforcing structure 140 and the shoe 100 as shown in Figure 1C.
  • the panels 150A and 150B may be further secured along and adjacent to their first edges 151 A, 15 IB by additional stitching on the inside of the shoe 100, and on the outside of the shoe 100 with the backstrap 107 to arrive at the embodiment shown in Figures 4A and 4B.
  • the outsoles 108, 109, insoles 118, 138, and straps 146 may then be applied.
  • the steps of the construction process disclosed herein may be performed in a different order; for example, the panels 150A and 150B may be assembled separately to the shoe upper 102 to form the reinforcing structure 140 of Figure 5, and then inserted through the opening 104 in the manner of an insole.
  • the reinforcing structure 140 is attached to the upper 102 by stitching and/or adhesive.
  • the stitch line 141 attaches the semi-rigid material starting at the top of the heel section, extending down and forward along a line through the side or back quarter of the shoe and extending into and through the arch section.
  • the stitch line 141 connects the reinforcing structure 140 to one or both of the upper 102 and the lining 103.
  • the backstrap 107 generally follows the longitudinal direction of the shoe 100.
  • the backstrap 107 runs along a centre-line of the shoe 100 from the top of the heel section 110 and into the arch section 120.
  • the reinforcing structure 140 continues through the arch section 120 and into the forefoot section 130 to join the front outsole 109 to form a semi-rigid, but flexible support structure for the shoe 100.
  • a suitable adhesive is a polychloroprene-toluene adhesive such as manufactured by Hung Li Resin Manufacturing Co. Ltd, which comprises 20-25% polychloroprene and 60-75% toluene.
  • Polychloroprene-toluene adhesives bond quickly, resist higher temperatures, and can provide strong adhesion between materials such as leather and neoprene.
  • a silicone-based adhesive may be used. Silicone adhesives have elastic properties across a wide temperature range which has advantages in the context of the frequent and robust movements that a dancer subjects their footwear to.
  • the reinforcing structure 140 may also provide proprioceptive effects where the wearer experiences improved tactile feedback, which may provide benefits such as an improved awareness of their foot position. This tactile feedback may help to remind the wearer to work their foot against the floor (improving muscle strength) and/or to remind the wearer to place their lower leg in a neutral alignment (reducing the likelihood of foot pronation and/or supination).
  • Figure 8 shows a section view of the assembled shoe 100.
  • the undulating profile of the first edges 151 A, 151B means that when the concave and convex edges are connected, the reinforcing structure 140 is biased to form the concave and convex surfaces in the heel portion 142, the arch portion 143, and the forefoot portion 144, without external support or structures.
  • the convex and concave edges provide curvature in both lateral and longitudinal directions around the back, bottom and sides of the heel so that the heel section 110 has a cupped shape that generally follows the contours of the wearer's heel without the need for moulds.
  • the convex and concave edges provide curvature in both lateral and longitudinal directions around the back, bottom and sides of the arch section 120, so that when the shoe 100 is assembled by stitching together the first edges 151 A, 15 IB, the arch section 120 is biased to have a concave shape.
  • the arch section 120 generally follows the contours of a dancer's arch without the need for moulds to shape the shoe beforehand.
  • the cumulative effect of integrating the cupping of the heel and the arch contour into the geometry of the panels 150A, 150B may, in some embodiments, at least reduce the need for an external support structure to achieve this shoe shape, particularly in the arch section 120, and may consequently reduce bulkiness.
  • a less bulky shoe may have advantages in lighter weight, improved foot flexibility, or in providing the wearer with an improved“feel” or“connection” to the floor which may have benefits regarding dancing technique and performance.
  • Each of the panels 150A, 150B may be formed from a single piece of material.
  • different pieces and types of material having different material characteristics may be used to form the semi-rigid material through the heel section 110 and the arch section 120, for example. In doing so, this may provide different levels of resistance in different parts of the shoe 100 and thus adjust the level of proprioceptive feedback.
  • the level of proprioceptive feedback through the arch section 120 may be adjusted through the addition of a further support or reinforcing structure, as shown in Figures 9A and 9B.
  • a small, thin, elongate flexible board 180 may extend through the arch section 120 and marginally into the heel and forefoot sections 110, 130, without extending through those sections.
  • the board 180 extends through the arch section 120 and through the heel section 110 wherein it may extend to the opening 104.
  • the purpose of the board 180 is to provide a supplement to the reinforcing structure 140 through the arch section 120, providing greater resistance to flexion of the foot and providing additional support to the arch.
  • the amount of resistance and the amount of arch support may be varied by varying the dimensions of the board 180.
  • the flexible board 180 may have a lateral width roughly the same as, or within about 20% of, the width of the semi-rigid material of reinforcing structure 140 through the arch section 120.
  • the flexible board 180 may be positioned along a longitudinal direction, such as a centre line, of the shoe 100 or slightly offset therefrom.
  • the board 180 may comprise a pulp board material, such as a“texon board” as is made by Texon International, or a similar board material.
  • the thickness of the board 180 may be around 0.5 mm to around 0.8 mm, and optionally around 0.6 mm.
  • Board 180 may be generally rectangular or slightly trapezoidal, or with slightly curved or flared ends.
  • a second board 185 may be used in conjunction with board 180.
  • the board 180 and/or the board 185 extends into the forefoot section 110, and may extend to be under the ball of the wearer’s foot.
  • the reinforcement provided by boards 180, 185 continues into the forefoot section 110 and is able to follow the contours of the wearer’s foot along most of its length. In particular, this provides support when the wearer’s foot is in pointe position.
  • Some embodiments may use the aforementioned polychloroprene-toluene adhesive or silicone adhesive to couple the second board 185 to board 180.
  • the second board 185 may be of similar material to board 180, and in some embodiments, the second board 185 substantially spans the length of the arch section 120, and may further extend into and/or through the heel section. This configuration may provide for improved arch support, improved torsional stiffness in the arch section 120, or at least improve the resiliency of the shoe 100 such that its shape in the arch section 120 lasts longer.
  • the boards 180, 185 may be positioned as an insert inside the shoe 100 and may be stitched or adhered between the upper 102 and the semi-rigid material of reinforcing structure 140, or between the semi-rigid material of reinforcing structure 140 and the lining 103.
  • boards 180, 185 may be stitched or adhered to one or both of lining 103 and outsole region 106 and sandwiched therebetween.
  • the boards 180, 185 may be glued in between the upper 102 and the reinforcing structure 140, before they are attached together.
  • the boards 180, 185 may be attached to each of the panels 150A, 150B, adjacent to or adjoining edges 151 A and 15 IB, as shown in Figure 9C, so that they resemble a single piece when edges 151 A and 15 IB are connected.
  • the board 180 and/or board 185 follows the contours of the wearer’s foot when the wearer points their foot.
  • the upper 102 and/or lining 103 is connected to board 180, this results in the upper 102 and/or lining 103 following the shape of the board 180, 185 and the shape of the wearer’s foot.
  • this may reduce wrinkling, puckering, bunching, or buckling of the upper/lining material in the forefoot section 130 and around the front outsole 109, particularly when the foot is pointed, creating a more streamlined, aesthetically pleasing appearance of the shoe 100.
  • the semi-rigid material of reinforcing structure 140 used in embodiments including one or more boards 180, 185 may be the same as described in relation to the other embodiments of shoe 100, in terms of its proportions, positioning, configuration and material characteristics, as previously described.
  • the amount of concavity in the arch section 120 is represented by the arch measurement Q, which is the maximum perpendicular distance between a measurement line 200 (as explained below with reference to Figures 10A and 10B below) and the first edge 151.
  • a more concave arch section 120 provides a closer fit in at least the arch section 120, which may provide comfort, support, and/or proprioceptive improvements for the wearer.
  • improved support and/or proprioception may provide the wearer with an improved awareness of their foot position and technique, such as regarding foot pronation, and thus may contribute to injury prevention and/or recovery, for example.
  • an improved fit may provide for aesthetic benefits in a more streamlined, form fitting appearance with a reduction in the creasing, bunching, or puckering of the shoe upper 102, particularly when the wearer’s foot is in a pointed position.
  • the shoe 100 is manufactured in a range of sizes to fit children and adults. Some embodiments are manufactured in sizes ranging from a child’s size 7 to an adult’s size 12.
  • Each size of the shoe 100 comprises a semi-rigid material in the form of reinforcing structure 140 with different dimensions in the heel, arch, and forefoot sections 110, 120, 130.
  • the minimum width of reinforcing structure 140 in the arch section is denoted W.
  • reinforcing structure 140 in the heel section 110 rises a perpendicular distance P measured from the lowest point of the heel, and wraps around each side of the upper heel portion 112 by a minimum length S.
  • the heel- arch transition portion 160 has a width T which narrows to a width V at the arch section 120.
  • the heel section 110 has a length X
  • the arch section 120 has a length Y
  • the forefoot section 130 has a length Z.
  • this curved profile can be approximated as an arc of radius R, and R determined using simple algebra once dimensions Q and Y are known.
  • Figure 10A illustrates an embodiment of the panel 150 for the shoe 100 in a child’s size 7.
  • the distance P is 45mm
  • S is 24.5mm
  • T 28mm
  • V 16mm
  • W is 14.5mm
  • Q is 5.5mm
  • X 32mm
  • Y 66mm
  • Z is 25mm.
  • the reinforcing material 140 in the arch section is biased to have a concave shape where Q may be as low as approximately 3mm.
  • Q may be as low as approximately 3mm.
  • Figure 10B illustrates an embodiment of the panel 150 for the shoe 100 in an adult’s size 12.
  • the distance P is 78mm
  • S is 47.5mm
  • T is 41mm
  • V is 21mm
  • W is 17mm
  • Q is 11.5mm
  • X is 59mm
  • Y is 133mm
  • Z 39mm.
  • the reinforcing material 140 in the arch section is biased to have a concave shape where Q may be as high as approximately 25mm.
  • These values of P, S, W, Q, X, Y, Z, and R approximately represent the upper bound of a range of values of P, S, W, Q, X, Y, Z, and R.
  • Some embodiments of the shoe may be made in youth sizes, the dimensions of which generally fall between the dimensions of the largest child shoe size and the smallest adult shoe size.
  • the values of P, S, T, V, W, Q, X, Y, Z, and R, are by way of example only and are intended to provide an indication of the proportions of the panels 150A, 150B. The values are summarised in the Table below.
  • EVA foam is Ethylene Vinyl Acetate (EVA) foam.
  • EVA foam is available in a wide range of grades, differing in thickness and density.
  • foam variants for example (but without limitation) Polyurethane Foam, Polyethylene Foam, Cross-Linked Polyethylene Foam, High Density Micro Cellular Foam and closed cell PVC Foam.
  • foam has excellent buoyancy properties and provides a good balance between structure, flexibility and resistance. Foam also offers cushioning properties, further enhancing the comfort levels for the wearer.
  • Other flexible reinforcing materials that can be employed in embodiments include, but are not limited to: felts, non-woven bonded synthetic fibres, counter materials and fibre boards, sponge rubber, rubber (natural, Neoprene, SBR, Butyl, nitrite or Buna N, Silicone, and Urethane), cork, flocked fabrics and paper (or other cellulose-based materials).
  • the thickness of the shoe upper 102 and lining 103 together may be around 1mm to around 4 mm, not including outsole portions or the semi-rigid material in reinforcing structure 140.
  • a thickness of the semi-rigid material in reinforcing structure 140 ranging from about 2mm to about 4mm is considered to be suitable.
  • the thickness required is determined by the type of shoe being constructed. For example, a ballet shoe with a delicate soft construction may require thin 2mm foam. As the shoe design becomes naturally more structured, thicker EVA foam may be required. For example, a jazz shoe may use 3 mm EVA foam and a tap shoe or dance sneaker may use 4 mm EVA foam.
  • the density can rise into the 75 to 105 kg/m 3 range or even up to 120 kg/m 3 , if the EVA foam is kept thin (e.g. 2 - 3mm).
  • the foam material may comprise EVA blended or otherwise combined with a rubber material, such as a synthetic rubber material.
  • the maximum thickness of ballet shoe embodiments for example including insole, lining, semi-rigid material, outer material (which may effectively be part of the upper) and outsole portion, preferably does not exceed about 8 - 10 mm and is preferably less than about 6 mm.
  • Various embodiments have been described herein, in combination with various different configurations, arrangements, features and functions of the depicted dance shoes. The embodiments are intended to cover various combinations of such features, functions, configurations and depicted arrangements, as may be appropriate for the type of dance shoe in question.
  • the embodiments of the shoe as illustrated in Figure 1 shows a ballet shoe with a strap in an X-shape arrangement, it should be understood that other ballet shoe embodiments described herein may have only a single strap.
  • the arrangement of straps 146 having a longitudinally shortened spacing between their connection points to the shoe upper 102 and having a position generally coinciding with the arch section 120 and/or heel-arch transition region 160 may be applied to the other ballet shoe embodiments described herein.
  • exploded diagrams have been provided to illustrate construction of some of the shoes described herein, this is provided by way of example and without limitation, as an illustrative guide to construction of the embodiments.
  • the semi-rigid materials used in the heel sections described herein are generally more flexible, softer and have a lower density than a standard heel counter, thereby readily allowing flexion of the foot without uncomfortably impinging on the skin or structures of the foot around the heel or arch.
  • Described embodiments also increase the levels of support for the foot and ankle by applying the semi-rigid material to areas of the shoe 100 that are expected to support the foot, like the heel, arch and outsole areas. This creates a flexible connection between the heel of the shoe 100, the outsoles of the shoe 100 and the arch of the shoe 100, offering more structure and body to the shoe 100 and subsequently more support, which has proprioceptive effects.
  • the application of the semi-rigid material provides the shoe 100 with a form fitting appearance and shape. This provides a proprioceptive connection for the wearer so that the wearer may have improved awareness of their foot, particularly when their foot is engaging with a contact surface, for example, a dance floor.
  • This same semi-rigid material by way of the thin flexible connection between the heel, outsoles and arch of the shoe 100, also offers controlled resistance to the muscles of the foot when performing a flex or point motion. This controlled resistance may encourage increased muscle strength over time.
  • the application of the flexible reinforcing structure 140 around the heel and arch sections may also improve the comfort level of dance shoes, which can increase the dancer’s confidence or sense of ease during movement.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

Des modes de réalisation de la présente invention concernent généralement une chaussure de danse, comprenant une tige de chaussure définissant une ouverture pour recevoir un pied ; une région de semelle extérieure destinée à être sous-jacente à une semelle du pied et en combinaison avec la tige définissant une section de talon, une section de voûte et une section d'avant-pied ; et une structure de renfort couplée à la tige de chaussure et à la région de semelle extérieure. La structure de renfort comprend une partie convexe s'étendant à partir de l'ouverture dans une partie supérieure de la section de talon autour d'une partie inférieure de la section de talon, et comprend une partie concave à travers la section de voûte le long d'une direction longitudinale de la chaussure, la structure de renforcement s'élargissant de manière adjacente à l'ouverture pour mettre en coupe sensiblement une partie postérieure inférieure du calcanéum d'un utilisateur et se rétrécissant ensuite vers la section de voûte.
PCT/AU2020/050638 2019-06-25 2020-06-24 Procédé et structure de fabrication de chaussure de danse WO2020257850A1 (fr)

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AU2019902214A AU2019902214A0 (en) 2019-06-25 Method and structure for making dance footwear
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598782A (en) * 1949-11-04 1952-06-03 George H Gillis Track shoe with cushioned heelreceiving pocket
GB2232057A (en) * 1989-05-26 1990-12-05 Burlington Int Group Dancer's shoe
US5220735A (en) * 1990-07-09 1993-06-22 Dancing Bonzi Company Pointe shoe
WO2000013539A1 (fr) * 1998-09-02 2000-03-16 Rem's Srl Fabrication d'un article chaussant
US20130104420A1 (en) * 2010-03-24 2013-05-02 Timothy Charles Heathcote Dance shoes with improved heel and arch sections

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Publication number Priority date Publication date Assignee Title
US5682685A (en) * 1995-10-12 1997-11-04 Ballet Makers Inc. Dance shoe sole
US7337558B2 (en) * 2005-03-01 2008-03-04 Ballet Makers, Inc. Split sole dance shoe having enhanced flexibility and support
WO2014016630A2 (fr) * 2012-07-21 2014-01-30 Hazzouri Jozette Chaussure de danse
US10624416B2 (en) * 2017-06-01 2020-04-21 Vionic Group LLC Footwear and the manufacture thereof
CN208403410U (zh) * 2018-06-07 2019-01-22 北京孝夕阳科技发展有限公司 广舞鞋

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598782A (en) * 1949-11-04 1952-06-03 George H Gillis Track shoe with cushioned heelreceiving pocket
GB2232057A (en) * 1989-05-26 1990-12-05 Burlington Int Group Dancer's shoe
US5220735A (en) * 1990-07-09 1993-06-22 Dancing Bonzi Company Pointe shoe
WO2000013539A1 (fr) * 1998-09-02 2000-03-16 Rem's Srl Fabrication d'un article chaussant
US20130104420A1 (en) * 2010-03-24 2013-05-02 Timothy Charles Heathcote Dance shoes with improved heel and arch sections

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