FR2993757A1 - Footwear article, has interior slipper including sole part whose lower face has attachment elements cooperated with attachment elements of upper face of sole part for removable securing of slipper to upper face of sole part of boot - Google Patents

Abstract

The article (1) has a boot (2) impermeable to liquid, comprising a sole part (3) with upper and lower faces (3a, 3b) and a stem part (4) delimiting interior volume. The upper face of the sole part of the boot emerges in the volume and includes attachment elements e.g. hooks, attached or molded to the sole part during molding of the parts of the boot in a polymer. An interior slipper (5) includes a sole part whose lower face has attachment elements e.g. protrusions, cooperated with the attachment elements for removable securing of the slipper to the upper face of the sole part of boot. An independent claim is also included for a method for manufacturing a footwear article.

Description

BACKGROUND OF THE INVENTION The present invention relates to the technical field of footwear comprising a boot, in particular impervious to liquids, and a removable inner boot.

The boots provided with a rod and a sole made of an injected polymeric material, in particular PVC, which is impermeable to liquids, in particular to water, generally comprise an inner liner secured to the rod in a non-removable manner. When the inner liner is wet, the waterproof upper prevents the water in the inner liner from evaporating quickly. The inner liner is thus very long to dry and can not be washed. Document US Pat. No. 7,434,336 B2 describes a shoe comprising hooks secured to the upper face of the insole and to the underside of the tongue disposed at the level of the guarantor, said hooks being able to cooperate with loops respectively arranged on the underside of the sole portion of the sock and on the kick of the latter for the removable fastening of the sock with the shoe. This footwear has the disadvantage that the hooks are disengaged from the insole. In addition, the operation of reporting the hooks is an additional operation in the making of the shoe. Furthermore, the hooks are attached to the upper face of the sole and thus create an uncomfortable protrusion coming into contact with the underside of the foot of the user. OBJECT AND SUMMARY OF THE INVENTION The present invention overcomes all or some of the aforementioned problems in that it relates to a footwear comprising a liquid impervious boot having a sole portion having upper and lower faces and a portion of a rod defining an interior volume, the sole portion and the shank portion being integral with at least one polymeric material, said article comprises an inner liner comprising a sole portion having upper and lower faces and a shank portion delimiting a housing for receiving the foot, said liner being adapted to be removably disposed in the interior volume of the boot. Typically, the upper face of the sole portion of the boot, opening into said interior volume, comprises first fastening members secured to said sole portion, or molded, during molding of the sole and stem portions in said at least one polymer. The lower face of the sole portion of the inner liner comprises second fastening members adapted to cooperate for the removable attachment of the inner liner to the upper face of the sole portion of the boot with said first fastening members. Advantageously, the first attachment members are molded together with the rod and sole portions or overmolded during molding of the rod and sole portions during the manufacture of the boot, in particular during the injection of at least one polymeric material constituting mainly the sole and the stem, ie preferably greater than 80% by weight of the weight of the sole and stem parts. The first attachment members being anchored in the sole, this arrangement prevents any risk of separation of the latter from the sole and strengthen the attachment force offered by the latter.

In the state of the art described in US Pat. No. 7,434,336 B2, as soon as the foot of the boot is removed, the first attachment members are stressed but also the element supporting them which is secured to the upper face of the sole. In the present invention, during the removal of the foot, and therefore correlatively from the inner liner of the inner volume of the boot, the first attachment members are biased together with the entirety of the sole with which they are molded. The sole portion of the boot according to the invention may be mono, bi or tri-layer, each layer being injected from at least one polymer, preferably different for each layer. For example, when the sole is bi-layered, it comprises an outer layer in at least one abrasion resistant polymer, for example thermoplastic polyurethane, and an inner layer in at least one flexible polymer, for example made of PU (polyurethane). ).

The polymer injected to form the stem portion is the same as that used to inject the sole portion when the latter is monolayer, or the same to inject the inner layer of the sole portion when the sole is bi or tri-layer, said inner layer having an upper face opening into the interior volume of the boot. The upper face of the sole according to the invention opens into the inner volume of the boot, and is intended to come into contact with the underside of the sole portion of the inner boot while the lower face of the sole portion is intended to to come into contact with the ground, and forms a part of the outsole. The inner liner of the invention is in one or more flexible panels assembled by sewing, gluing, ultrasonic or high-frequency welding. The panel or panels are preferably textile panels, which may be a fabric, a knit, a felt, a nonwoven or a mixture thereof. The first attachment members may be molded in particular when the latter are hooks, having any shape (hooks, mushrooms, T, ...) capable of locking in fibrous elements or loops.

The first attachment members may also be molded when the latter are cells and / or protrusions, able to cooperate with second complementary fastening members, protrusions and / or cells, for their joining.

The stem portion of the boot preferably covers the entire foot and all or part of the leg according to its height. In a variant, the first attachment members are arranged at least on the rear bead portion, and optionally at least the intermediate portion, of the upper face of the sole portion.

Given the shape of a boot, the kick at the boot shank may be sufficient to maintain the forefoot area in the footwear. In a variant, the first attachment members are hooks and / or magnets and / or cells and / or protrusions, preferably hooks. Preferably, the protrusions are in a metal or a material more rigid than the cells forming the second fastening members so as to deform said cells during their cooperation. In a variant, the first attachment members are arranged in a recess in the sole portion so that their peaks with respect to the hooks or protrusions, or their upper face (s) acting the magnet (s) or cells are in the plane (P) of the upper face of the sole portion. When the first attachment members are not disposed over the entire upper face of the sole portion, they are arranged during the recessed molding of the surface to form the plane (P) of the sole so that their vertices or upper faces pass through said plane (P) thus allowing the formation of a contact surface and support for the foot of the user substantially flat, thereby improving comfort.

In a variant, the first attachment members cover the entire upper face of the sole portion and form a substantially flat contact surface. In a variant, the second attachment members are loops, in particular textile fiber elements, and / or one or more magnets and / or a plate whose lower face comprises cavities and / or protrusions. Said plate is preferably a plate obtained by molding at least one polymeric material, and is secured, for example by gluing, according to the underside of the inner liner. The second attachment members may also be a plate molded in at least one polymeric material having buckles on its underside. Said plate may also be overmolded on an element 15 comprising hooks along at least one of its upper or lower faces. In this case, when the lower face of the sole portion of the inner liner comprises loops, the latter are able to cooperate with said overmolded plate according to its face covered with hooks for their idarization ground. The magnet or magnets can be reported according to the underside of the inner liner, in particular by gluing. The fibrous elements may constitute all or part of the outer textile panel forming the underside of the inner liner or constitute a textile panel attached to said lower face, in particular by gluing. In a variant, the underside of the inner liner comprises a textile material having loops, in particular a nonwoven or loop pile. Alternatively, the boot shank portion includes an upper rim and the inner liner shank portion has a height (H) greater than the height (h) of the boot shank portion a distance ( d) so as to form a fold enveloping all or part of said upper edge when the inner liner is disposed in the interior volume of the boot.

This arrangement makes it possible to cover the upper edge of the boot with the soft inner liner and thus prevent the leg from coming into direct contact with the border which may be uncomfortable or even injurious for the user. Alternatively, the rear portion of the inner liner shank portion includes a tongue provided on its opposite upper and lower faces respectively with first and second attachment means and the rear portion of the boot shank portion includes a slot , the slot and said tongue being arranged on the stem portions of the boot and the inner boot so that the tongue can be passed through said slot and folded on itself to cooperate the first and second attachment means when the inner liner is housed in the inner volume of the boot. The inner liner and the boot may respectively comprise several tongues and several slots adapted to cooperate as indicated above to improve the fastening of the boot to the inner liner. Preferably, the slot or slits, and therefore correspondingly the tongue or tabs, are respectively disposed on the stem portions of the boot and inner liner so as to be at a distance from said lower upper edge to the height of the fold of the inner booties. In a variant, said at least one polymer is chosen alone or in combination from the following polymers: natural or synthetic rubber, polyvinyl chloride (PVC), low density polyethylene, styrene elastomeric thermoplastics, in particular styrene polymer, butadiene-styrene (SBR) and styrene-ethylene-butylene-styrene polymer (SEBS), vulcanized thermoplastics, especially EPDM phase polypropylene (ethylene-propylene diene monomer) or NBR (nitrile butadiene rubber), polyurethanes thermoplastics, polyurethanes, preferably polyvinyl chloride (PVC), thermoplastic styrene elastomers, and thermoplastic polyurethanes. Said at least one polymer designated above, alone or in combination, can be used for the stem portion and the sole portion of the boot but also for the plate supporting the second fastening members, that it comprises alveoli, protrusions or loops. The object of the present invention is, according to a second aspect, a method of manufacturing an article of footwear comprising a boot having a sole portion having upper and lower faces and a portion of a shaft delimiting an interior volume and an inner liner. Comprising a sole portion having upper and lower faces and a stem portion defining a foot receiving housing according to any one of the preceding embodiments. Advantageously, said method comprises the following steps: a. a first step of placing in a mold an element having opposed upper and lower faces, said upper face comprising first fastening members, in particular hooks, at the region of the mold intended to form the upper face of the sole portion of the boot, 25 b. a second step of molding the sole and stem portions using said mold and a counter-mold for the manufacture of a boot by injecting at least one polymer for forming the boot and the securing said element comprising the first attachment members to the boot sole portion by overmolding, c. a third step of providing an inner liner whose lower face of the sole portion comprises second fastening members adapted to cooperate with the first attachment members for the removable attachment of the inner liner to the sole portion of the boot. Alternatively, the lower face of said element has a high coefficient of friction, preferably said lower face comprises first and / or second attachment members, including hooks and / or loops.

This arrangement promotes the attachment of said element to the wall against the mold and prevents it from migrating from the position in which it was placed. Preferably, the upper face of said element comprising the first and / or second attachment members is disposed against the portion of the mold intended to form the upper face of the sole portion and thus opening into the interior volume of the boot. The element may be a plate in at least one polymeric material having opposite top and bottom faces. In this case, said element is in at least one polymer having a melting or decomposition temperature higher than the injection temperature of said at least one polymer. For example, the injection temperature is of the order of 180 ° C for PVC. Said element has a height (e) greater than or equal to 2 mm, preferably greater than or equal to 3 mm, and more preferably greater than or equal to 4 mm. The inventors have in fact determined that said element supporting the first attachment members must not only withstand the injection temperature but also the injection pressure, which is relatively important in the case of a boot, particularly for adults. . For example, the pressure for the injection of said at least one polymer is about 60 bar. Said element must not move from the position in which it was placed under the pressure exerted during the injection and must remain perfectly flat during injection. The element should not fold or curl.

In a variant, said element has a determined height (e) and said mold comprises a recess arranged so as to receive said element and having a height (E) substantially of the same order as the height (e). This arrangement allows the tops or the upper face (s) 10 (s) of fasteners are in the same plane as the upper face of the sole portion. On the injected sole portion, the first overmolded fastening members are surrounded by a recessed groove corresponding to the periphery of the recess and the complementary part of the counter-mold 15 in which the fastening member is positioned. Preferably, the counter-mold comprises at least one injection point disposed opposite the lower face of said element. Thus, the injected polymer will cover the underside of said element, which will be secured once said polymer cooled. In a variant, the recess of the mold is completely or partially covered with at least one polymer having a melting or degradation temperature greater than the injection temperature of said injected polymer, preferably said at least one polymer is a fluorinated polymer, especially polytetrafluoroethylene (PTFE). The upper face of said element comprising the first attachment members is thus protected from the heat generated by the injection of said at least one polymer. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood on reading the exemplary embodiments described below, given by way of non-limiting example, and illustrated by the following figures in which: FIG. 1 represents in perspective an exemplary article footwear according to the invention; - Figure 2 shows schematically and in perspective the inner liner of the footwear shown in Figure 1; - Figure 3 shows schematically, the rear portion of the stem portion of the boot of the footwear shown in Figure 1; - Figure 4 schematically shows a securing means of the inner liner shown in Figure 2 with the boot shown in Figure 3; FIG. 5 diagrammatically and from below, the lower face of the inner liner shown in FIG. 2; FIG. 6 is a diagrammatic representation, seen from above, of the upper face of the sole portion of the boot shown in FIG. in Figure 3; - Figure 7 shows schematically and seen from below, a variant of the second attachment members disposed on the underside of an inner boot according to the invention; and FIG. 8 schematically represents a top view of the upper face of the sole portion of the boot comprising first fastening members able to cooperate with the second attachment members shown in FIG. 7.

DETAILED DESCRIPTION OF THE INVENTION The article of footwear 1 shown in perspective in FIG. 1 comprises a boot impermeable to liquids 2, in particular to water, having a sole portion 3 having upper faces 3a and lower 3b and a portion rod 4 defining an interior volume, the sole portion 3 and the rod portion 4 being integral in at least one polymeric material. Said article 1 also comprises an inner liner 5 comprising a sole portion 6 having upper faces 6a and lower 6b and a shank portion 7 defining a housing for receiving the foot. The upper face 3a of the sole portion 3 of the boot 2, shown in FIG. 6, opening into said inner volume, comprises first attachment members 8 arranged on the heel portion 6c of the sole portion 6. In this specific example, the first attachment members 8 are hooks secured by overmolding to said upper face 3a of the sole portion 3 during molding of the sole 3 and rod 4 parts in said at least one polymer. Thus clearly distinguishes the groove 3c formed according to the upper face 3a and 20 corresponding to the periphery of the recess of the mold in which has been placed the element supporting the fasteners 8 and the corresponding projection supported by the counter-mold . The lower face 6b of the sole portion 6 of the inner liner 5 comprises second fastening members 9, shown in FIG. 5, able to cooperate for the removable fastening of the inner liner 5 to the upper face 3a of the portion of sole 3 of the boot 2 with said first fasteners 8. In this specific example, said second fastening members 9 are a plate molded in at least one polymeric material comprising loops.

As shown in Figure 5, the first attachment members 8 are arranged in the plane (P) of the sole portion 3 of the boot 2 and thus form a substantially flat bearing surface (P). As shown in FIG. 3, the shank portion 4 of the boot 25 comprises an upper edge 4a and the shank portion 7 of the inner liner 5 has a height (H) greater than the height (h) of the portion of rod 4 of the boot 2 a distance (d) so as to form a fold 10 shown in Figure 1 wrapping the entire upper edge when the inner liner 5 is disposed in the inner volume of the boot 2. The part of rod 7 of the inner liner 5 also comprises a tongue 12, shown in Figures 2 and 4, provided on its upper faces 12a and 12b respectively opposite opposite first and second attachment means. The rear portion 4b of the shank portion 4 of the boot 2 comprises a slot 13, shown in FIGS. 3 and 4, the slot 13 and said tongue 12 being arranged on the shank portions (4b, 7) of the boot 2 and the inner liner 5 so that the tongue 12 can be passed through said slot 13 and folded back on itself to cooperate the first and second fastening means when the inner liner 5 is housed in the inner volume of boot 2. Said at least one polymer is chosen alone or in combination from the following polymers: natural or synthetic rubber, polyvinyl chloride (PVC), low density polyethylene, styrene elastomeric thermoplastics, in particular styrene polymer, butadiene-styrene (SBR) and styrene-ethylenebutylene-styrene polymer (SEBS), vulcanized thermoplastics, especially EPDM phase polypropylenes (ethylene-propylene diene monomer) or NBR (nitrile butadiene rubber), thermoplastic polyurethanes, polyurethanes, preferably polyvinyl chloride (PVC), thermoplastic styrene elastomers, and thermoplastic polyurethanes. FIG. 7 shows an alternative embodiment of the second attachment members shown in FIG. 5. The second fastening members 14 are in this specific example protrusions 15 molded in a plate 16 in at least one polymer, said plate 16 being dimensioned so as to be attached to the rear and middle portions of the lower face 6b of the sole portion 6 of the inner liner 5.

FIG. 8 represents a variant of the first attachment members 17 according to which cells 18, in particular metal cells, are overmolded together with the portion of the rod 4 and the sole portion 3 of the boot 2. The said cells 18 may be also formed by molding during molding of the rod portions 4 and sole 3.

These cells 18 are arranged on the upper face 3a of the sole portion 3 of the boot 2 so as to cooperate by interlocking force with the protrusions 15 supported by the lower face 6b of the sole portion 6 of the inner liner 5. Advantageously , the first attachment members 17 are secured to the sole portion 3 during molding of the latter with the rod 4 to form a boot impermeable to liquids 2. The inner liner 5 comprises second attachment members 15, 16 fit to cooperate with the first attachment members 17 for its removable attachment with the boot 2. The inner boot 5 is easily separable from the boot 2 for its maintenance and can be replaced by another inner boot if necessary, thus extending the duration of life of the boot 2.

Claims (14)

REVENDICATIONS1. An article of footwear (1) comprising a boot (2) impervious to liquids having a sole portion (3) having upper (3a) and lower (3b) faces and a shaft portion (4) defining an interior volume, the portion of sole (3) and the shank portion (4) being integral with at least one polymeric material, said article (1) comprises an inner liner (5) comprising a sole portion (6) having upper faces ( 6a) and lower (6b) and a stem portion (7) delimiting a housing for receiving the foot, said shoe (5) being adapted to be removably disposed in the interior volume of the boot (2), characterized in that that the upper face (3a) of the sole portion (3) of the boot (2), opening into said interior volume, comprises first fastening members (8, 17) secured to said sole portion (3), or molded, during the molding of the sole (3) and stem (4) parts in said at least one polymer and in that ue the lower face (6b) of the sole portion (6) of the inner liner (5) comprises second fastening members (9, 14) adapted to cooperate for the removable attachment of the inner liner (5) to the upper face. (3b) of the sole portion (3) of the boot (2) with said first fastening members (8,17). 2. article of footwear (1) according to claim 1, characterized in that the first fastening members (8,17) are arranged at least on the rear portion of heel (6c), and optionally at least the intermediate portion, the upper face (3a) of the sole portion (3). 3. Footwear (1) according to either of claims 1 and 2, characterized in that the first attachment members (8, 17) are hooks and / or magnets and / or protrusions and / or cells (18), preferably hooks. 4. Article footwear (1) according to any one of claims 1 to 3, characterized in that the first fastening members (8,17) are arranged in a recess of the sole portion (3) so that their vertices with respect to the hooks or protrusions, or the upper face (s) with respect to the magnet (s) or cells being in the plane (P) of the upper face (3a) of the sole part (3). 5. Footwear according to any one of claims 1 to 4, characterized in that the first attachment members cover the entire upper face of the sole portion and form a substantially flat bearing surface. 6. Article footwear (1) according to any one of claims 1 to 5, characterized in that the second fastening members (9,14) are fibrous textile elements forming loops and / or one or more magnets and / or or a plate (16) whose lower face comprises cavities and / or protrusions (15). 7. Footwear (1) according to any one of claims 1 to 6, characterized in that the underside (6b) of the sole portion (6) of the inner liner (5) comprises a textile material having loops ( 9), especially a nonwoven or loop pile. 8. Article footwear (1) according to any one of claims 1 to 7, characterized in that the stem portion (4) of the boot (2) comprises an upper edge (4a) and in that the stem portion (7) the inner liner (5) has a height (H) greater than the height (h) of the stem portion (4) of the boot (2) by a distance (d) so as to form a fold ( 10) wrapping all or part of said upper edge (4a) when the inner liner (5) is disposed in the interior volume of the boot (2). 2 9 9 3 7 5 7 16 9. Article footwear (1) according to any one of claims 1 to 8, characterized in that the rear portion of the shaft portion (7) of the inner liner (5) comprises a tongue (12) provided on its upper faces. (12a) and lower (12b) opposing respectively first and second attachment means and in that the rear portion (4b) of the stem portion (4) of the boot (2) comprises a slot (13), the slot (13) and said tongue (12) being arranged on the stem portions (7,4) of the boot (2) and the inner boot (5) so that the tongue (12) can be passed through said slot (13) and folded on itself to cooperate the first and second attachment members when the inner liner (5) is housed in the inner volume of the boot (2). 10.The article of footwear (1) according to any one of claims 1 to 9, characterized in that said at least one polymer is chosen alone or in combination from the following polymers: natural or synthetic rubber, polyvinyl chloride (PVC ), low density polyethylene, thermoplastic styrene elastomers, especially styrene-butadiene-styrene polymer (SBR) and styrene-ethylene-butylene-styrene polymer (SEBS), vulcanized thermoplastics, in particular EPDM phase polypropylenes (ethylene-propylene diene monomer) or NBR (nitrile butadiene rubber), thermoplastic polyurethanes, polyurethanes, preferably polyvinyl chloride (PVC), thermoplastic styrene elastomers, and thermoplastic polyurethanes. 11.Process for manufacturing an article of footwear (1) comprising a boot (2) having a sole portion (3) having upper (3a) and lower (3b) and a stem (4) portion defining a volume an inner liner (5) 2 9 93 75 7 17 comprising a sole portion (6) having upper (6a) and lower (6b) faces and a shank portion (7) defining a housing for receiving the foot according to any one of claims 1 to 10, characterized in that it comprises the following steps: a. a first step of placing in a mold an element having opposed upper and lower faces, said upper face comprising first fastening members (8, 17), in particular hooks, at the region of the mold intended for forming the upper face (3a) of the sole portion (3) of the boot (2), b. a second step of molding the sole (3) and stem (4) parts with the aid of said mold and against a mold for the manufacture of a boot (2) by injecting at least one Polymer for forming the boot (2) and securing said member having the first attachment members (8,17) to the sole portion (3) of the boot (2) by overmolding, c. a third step of providing an inner liner (5) 20 whose lower face (6b) of the sole portion (6) comprises second fastening members (9, 14) adapted to cooperate with the first members of fastener (8, 17) for the removable fastening of the inner boot (5) to the sole portion (3) of the boot (2). 25 12.Procédé de manufacture according to claim 11, characterized in that the underside of said element has a high coefficient of friction, preferably said lower face comprises first and / or second attachment members, including hooks and / or curls. 13.Manufacturing method according to claim 11 or 12, characterized in that said element has a determined height (e) and in that said mold comprises a recess arranged so as to receive said element and having a height (E) substantially of the same order as the height (e). 14.Procédé de manufacture according to any one of claims 11 to 13, characterized in that the recess of the mold is covered in whole or in part with at least one polymer having a melting temperature or degradation greater than the temperature d injection of said injected polymer, preferably said at least one polymer is a fluorinated polymer, especially polytetrafluoroethylene (PTFE).