Inner lining bootie comprising membrane material

Abstract

A bootie for an upper of an article of footwear, in particular for a sports shoe, comprises a set of basic pattern pieces made of a layered structure comprising at least one membrane and at least one extension piece made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie at an ankle region of the user when in use. The at least one extension piece is connected to the set of basic pattern pieces along at least one first connection line. The bootie further comprises a lining piece being stitched to the at least one extension piece along a top part of the lining piece and covers the at least one extension piece and the set of basic pattern pieces on the inside of the bootie when in use. The lining piece covers the at least one first connection line. The at least one extension piece thereby creates a link between basic pattern pieces and lining piece.

Description

1. Field of the invention

[0001] The present invention relates to an inner lining bootie for an upper of an article of footwear, in particular for a sports shoe. The bootie comprises a set of basic pattern pieces with at least one membrane to ensure waterproofness and breathability of the article of footwear and an extension piece made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie at an ankle region, ensuring the comfort of the finished shoe at the heel region. The bootie also comprises a lining piece stitched to the at least one extension piece along a top part of the lining piece, wherein the lining piece covers the at least one extension piece and the set of basic pattern pieces on the inside of the bootie when in use such that the lining piece covers the at least one first connection line, and wherein the at least one extension piece thereby creates a link between basic pattern pieces and lining piece.

[0002] The present invention also relates to an upper with such a bootie and to a shoe, in particular for a sports shoe, with such an upper as well as a method of producing such a bootie.2. Prior art

[0003] A shoe is commonly described as the combination of an upper and a sole. Typically, the upper covers regions such as the instep, the toe, the medial side, the lateral side, and the heel of a wearer's foot and provides an opening to allow the wearer to step inside the footwear.

[0004] From document EP 3 308 667 B1 an article of footwear is known, which incorporates a textile upper. The upper comprises a knitted component. The knitted component may be warp knitted. The knitted component has an outer side and an inner side that can have different knit configurations. The knitted component can also incorporate portions of a single layer construction and portions of a double layer construction. The double layer construction forms pockets on portions of the knitted component. Inserts can be placed into the pockets to provide support, stability, or other desired properties to the portions of the knitted component.

[0005] Additionally, in document EP 2 001 319 B1, interior members for foot-receiving devices, such as bootie elements for articles of footwear, are disclosed. These interior members include a material element at least partially defining a foot-receiving chamber. This material element may include, in some examples, a heel-surrounding portion, a lateral side portion, a medial side portion, and a seamless plantar portion in a continuous, one-piece arrangement. Additionally or alternatively, in some examples, the material element may include a heel-surrounding portion, a lateral side portion, a medial side portion, a plantar surface, and a double layer of the material element at least along an Achilles area portion. Additional aspects relate to material blanks for forming such interior members as well as to foot-receiving devices, such as athletic footwear, including such interior members.

[0006] Membrane materials have properties such as waterproofness, breathability, wind tightness and elasticity which are desirable in the field of sports apparel and of shoes in general. These qualities have made them preferred material in several applications. Membrane materials are often used to provide a waterproof insert to a shoe.

[0007] Known inserts for hiking shoes, such as bootie constructions, usually comprise a lateral part for the outer side of the foot and a medial part for the inner side of the shoe, both comprising a membrane to provide for waterproofness, which are sewn together at a heel center region. Additionally, a collar top lining, defining the top line of the bootie at an ankle region and often made of a smoother material, is sewn to the lateral and medial part of the bootie. Because of the location of the seams, facing the inside of the shoe and in regions which are prone to stress when the shoe is used, and because the material of the bootie parts often does not allow to build smooth seams, the seams have been experienced as uncomfortable and, due to bulky areas, as creating pressure on the foot by many users. Attempts have been made to improve the quality of the seams, but it remains a real challenge in mass production environments.

[0008] Therefore, subject of the present invention is to provide a new bootie for an upper and for a shoe which minimizes or eliminates the above-described problems. It is a further object of the invention to provide a bootie which ensures watertightness, sufficient vapor permeability and high wearing comfort. Additionally, it is an object of the present invention to propose an upper with said bootie with which a shoe is watertight and still is comfortable even during intensive use.3. Summary of the invention

[0009] The above-mentioned objects are at least partially achieved by the subject matter of the independent claims. Preferred embodiments are subject of the dependent claims, and other suitable aspects of the present invention are described through the overall disclosure of the present application. It is noted that the headlines in the present disclosure are provided solely for the purpose to assist in keeping an overview during reading. The headlines do not mean that features of the respective embodiments cannot be combined.Definitions

[0010] The term "membrane" as used herein may refer to a specialized layer or coating applied to fabric to impart specific functional properties, such as waterproofing, breathability, or insulation. Membranes are thin, flexible, and typically made from polymers or other synthetic materials. They are designed to alter the performance characteristics of the fabric, enhancing its functionality for various applications. They may function as a kind of selective filter that is integrated into the fabric structure to perform specific filtration functions. Membranes can be applied to both natural and synthetic fabrics and are commonly used in outdoor apparel, sportswear, and technical textiles.

[0011] The term "elasticity" as used herein may refer to the property of a material that allows it to return to its original shape and size after being stretched or deformed. It is a measure of how well a material can withstand deformation and recover its initial form when the applied force is removed.

[0012] The term "vapor permeability" or "water vapor permeability" (WDD) as used herein, also related to the moisture vapor transmission rate (MVTR), is a measure of the ability of a material to allow water vapor to pass through it. It quantifies the rate at which water vapor diffuses or permeates through a material per unit of time and unit of area under specific conditions. Vapor permeability may typically be expressed with a Thermal Evaporative Resistance (RET) value defined by the ISO 11092 standard. The vapor permeability may also be expressed in units such as grams per square meter per day (g / m 2< / day) or grams per square meter per hour (g / m 2< / h). Various standardized test methods, such as ASTM E96, are used to measure vapor permeability.

[0013] The term "waterproofness" as used herein may refer to the property of a material or structure that prevents the passage or penetration of liquid water. It indicates the ability of a material to function as a barrier against water ingress, thereby protecting underlying surfaces or contents from moisture damage. Waterproofness is often quantified and evaluated through standardized testing methods, such as dynamic waterproof test (DIN EN ISO 5403), to determine the behavior of waterproof materials under dynamic stress water penetration test (AATCC 127, ISO 811) to determine the resistance of fabrics to water penetration under pressure wicking test to determine the capillarity absorption of water treated materials and components.

[0014] These tests assess the ability of a material to withstand water infiltration under controlled laboratory conditions.Bootie and shoe upper for an article of footwear

[0015] In one aspect, a bootie for an upper for an article of footwear, in particular for a sports shoe, is provided, which comprises a set of basic pattern pieces made of a layered structure comprising at least one membrane, and at least one extension piece made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie at an ankle region of the user when in use. The at least one extension piece is connected to the set of basic pattern pieces along at least one first connection line to form the bootie. The bootie further comprises a lining piece stitched to at least part of the upper edge of the at least one extension piece along a top part of the lining piece at a second connection line. The lining piece covers the at least one extension piece and the set of basic pattern pieces on the inside of the bootie when in use, such that the lining piece covers the at least one first connection line. This increases the comfort for the user, as protruding or rough parts are covered and cannot potentially create blisters anymore.

[0016] Technically, the at least one extension piece creates the link between the set of basic pattern pieces and lining piece. In other words, it is the interface between the set of basic pattern pieces and the lining piece. Because of its little thickness and high elasticity, the extension piece can compensate the differing material properties of lining piece and the set of basic pattern pieces. This way, a lining piece large enough to cover the at least one first connection line can be used while crumpling of the basic pattern pieces that may occur with a direct connection between lining piece and the set of basic pattern pieces can be avoided.

[0017] Therefore, while keeping the waterproof and vapor permeability properties on a high level, the bootie is more comfortable to the user because on the one hand, crumpling of the basic pattern pieces is avoided, and on the other hand, uncomfortable seams are covered up.

[0018] Additionally, a different, more suitable material regarding elasticity, stiffness, price, can be chosen for the extension piece, while keeping the desired properties of watertightness and breathability / vapor permeability in the basic pattern pieces. In particular, choosing a thin material for the extension piece contributes to render the shoe less bulky and stiff at the heel cord region, which is a location where the user often experiences sore feet.

[0019] Mostly the lining piece is made of a material having a higher elasticity than the material of the basic pattern pieces. This ensures a better fit on the inside of the shoe.

[0020] The choice of an extension piece therefore allows the combination of a waterproof and breathable shoe, and a comfortable shoe designed to avoid blisters and other sores. Example membranes are often made from synthetic polymers such as polypropylene, polyethylene, polyamide (nylon), or polytetrafluoroethylene (PTFE) or expanded PTFE (ePTFE). These materials can be engineered to have further specific properties such as puncture resistance, stub resistance, hydrophilicity, hydrophobicity, chemical resistance, and mechanical strength to suit different filtration requirements. The following materials for the membrane of the basic pattern pieces can be chosen according to the desired membrane thickness, waterproofness and vapor permeability: polyvinylidene fluoride or polyvinylidene difluoride (PVDF), polychlorotrifluoroethylene (PCTFE or PTFCE), polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), paraformaldehyde (PFA), polyvinyl fluoride (PVF), polyether ether ketone (PEEK), polyethylene naphthalate (PEN), fluorinated ethylene propylene (FEP), polyethylene terephthalate (PET, PETE), polytetrafluoroethylene (PTFE), polyetherimide (PEI), nylon 6 or polycaprolactam and polyimide (Kaption, PI).

[0021] To secure the lining piece within the bootie, side edges of the lining piece can be fixed by adhesive to the set of basic pattern pieces. This way, the basic pattern pieces are not perforated by the stiches and the watertightness of the bootie is not compromised. Additionally, no additional bulk is created on the edges, as opposed to when side edges are fixed by stitching. This further improves the comfort for the user.

[0022] Such a lining piece covers the heel region, which is highly exposed to mechanical stress when the user is in motion. To make sure that the lining piece does not move, advantageously a bottom part of the lining piece is connected via zigzag stitching to the set of basic pattern pieces along a third connection line. With a zigzag stich the connection between lining piece and basic pattern pieces is securely made and the connection is sufficiently stretchable to allow for movement without breaking. It further allows a flat seam together with holding back single threads that might become loose at the edge of the lining pieces.

[0023] When adding a lining piece to the bootie, one advantage is that a collar top foam can be included in the upper part of the lining piece next to a second connection line where it is connected to the extension piece. Such a collar top foam improves the comfort of the shoe for the user, and it can add hold the foot of the user at the ankle region to prevent injury.

[0024] Advantageously, the lining piece is connected to the at least one extension piece via a zigzag stitch along a second connection line. A zigzag stitch has the advantage of being stretchable while holding two different pieces of fabric securely together. This additionally allows to compensate part of the different material properties of the joined fabrics. The second connection line is flattest when the two pieces of fabric that are to be joined are abutted, i.e. joined edge-to-edge, when connected via said zigzag stitch.

[0025] Similarly, to connect the extension piece to the basic pattern pieces, preferably a zigzag stitch is used at the first connection line. Again, the zigzag stitch has the advantage of being stretchable while holding two different pieces of fabric securely together. Also here, to obtain a flat bootie at the first connection line, the extension piece and the basic pattern pieces are preferably abutted, i.e. joined edge to edge when connected via said zigzag stitch.

[0026] It has proven advantageous when the at least one extension piece defines a V-shaped recess at the open edge of the extension piece opposite the first connection line. Such a V-shaped recess is located at the center of the heel region of the user when in use, such that at least one extension piece spares out at least part of the heel cord region of the user when in use. As this heel cord region is prone to sores for many users, minimizing the bulk at this location has shown to reduce the potential blisters and similar.

[0027] With two extension pieces respectively connected to the set of basic pattern pieces on the left side and on the right side of the heel cord region of the user when in use, the V-shaped recess can easily be created. To this end, the ends of the two extension pieces could for example be slanted. An advantage of two extension pieces is that they can further facilitate the production process of the bootie, because it allows connecting the extension pieces to the set of basic pattern pieces before these basic pattern pieces are sewn together.

[0028] At the heel cord region, the lining piece may not have the same shape as the extension piece. In such a case, the lining piece is not stitched to the at least one extension piece in the region of the V-shaped recess. Instead, it is only fixed to the extension piece along the edges that match in shape.

[0029] In some embodiments, the at least one extension piece is designed to cover at least more than half of the ankle region of the user when in use. This coverage strengthen the before mentioned advantages.

[0030] Booties are available in different heights depending on the function the shoe is designed for. Hiking shoes for example require a sturdier manufacturing and have a higher mid cut construction. The bootie according to the invention can also be designed for a hiking shoe. In such a case, the extension piece in designed to cover the ankle region of the user when in use. This ensures a reinforced ankle region to support the ankle of the user.

[0031] Of course, when the bootie according to the invention is designed for lightweight, low-cut shoes, the extension piece is designed to abut the ankle region of the user without covering it when in use.

[0032] The bootie of the invention includes a set of basic pattern pieces. Such a set may comprise a lateral pattern, a medial pattern, a bootie insole pattern and a bootie bottom gasket to seam-seal the bottom area of the bootie. These pattern pieces allow to create the desired 3d-shape of the bootie with a low number of single pieces. Thereby, for each pattern piece, a specific material can be chosen to enhance the properties that the bootie construction can offer.

[0033] If a sturdy shoe like a hiking shoe is desired, the bootie should also offer more support. This can be achieved with a bootie wherein at least part of the membrane of layered structure is designed to be freely floating, for example with respect to the outer shell of the upper.

[0034] Examples of material where the membrane is designed to be freely floating with respect to the outer shell are textiles composed of synthetic yarn such as PES (polyester including CDP / TPE and other polyester derivatives), PA (polyamide), TPU, EL / PU (elastane / PU content), textile from natural yarn such as cotton or cellulosic yarn such as lyocell. Cow leather, PU coated synthetic leather.

[0035] An example of a layered structure used in the bootie of the present invention comprises, as seen from the inside to the outside of the bootie when in use, a textile lining, a membrane layer, a backer textile such as a backer knit, a woven backer or similar. The textile lining can be one of polyester(PES and any other polyester derivatives such as CDP, TPE, TPEE), PA (polyamide), Elastane (PU / EL), lyocell, wool, cotton, the membrane layer can be one of polyethylene (PE), expanded polyethylene (EPe), thermoplastic polyurethane (TPU), polyurethane (PU), polyamide (nylon), polytetrafluoroethylene (PTFE) or expanded PTFE (ePTFE (PVDF), polychlorotrifluoroethylene (PCTFE or PTFCE), polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), paraformaldehyde (PFA), polyvinyl fluoride (PVF), polyether ether ketone (PEEK), polyethylene naphthalate (PEN), fluorinated ethylene propylene (FEP), polyethylene terephthalate (PET, PETE), polytetrafluoroethylene (PTFE), polyetherimide (PEI), nylon 6 or polycaprolactam and polyimide (Kaption, PI), the backer textile can be one of polyester(PES and any other polyester derivatives such as CDP, TPE, TPEE), PA (polyamide), Elastane (PU / EL), lyocell, wool, cotton. Climaproof booties, i.e. booties designed for especially harsh weather conditions, may have an additional layer of PU foam

[0036] In one aspect of the invention, an upper for an article of footwear, in particular for a sports shoe, comprising a bootie according to the invention is provided. The upper includes an upper material, such as one or more of textiles composed of synthetic yarn such as PES (polyester including CDP / TPE and other polyester derivatives), PA (polyamide), TPU, EL / PU (elastane / PU content), textile from natural yarn such as cotton or cellulosic yarn such as lyocell, cow leather, PU coated synthetic leather. Additionally, the upper can further comprise eyestays to add a lacing to the shoe, reflective details, heel tabs or tongues tabs to facilitate stepping in into the upper, protective overlays made from PU leather, real leather or TPU foil, TPU molded pieces, like e.g. cage or toe cap, heel counter, webbings for lacing made from textile or metal hooks, metal eyelets, knit collar pieces.

[0037] Generally, the upper comprising the bootie according to the invention can be turned into a shoe, in particular a sports shoe, by adding a sole. The shoe may further comprise an upper Strobel pattern to connect the upper to the sole. The Strobel pattern will add strength to the insole of the bootie when doubling up the bootie insole pattern. The Strobel pattern can further include a material with damping properties to protect the joints of the user.

[0038] To produce a bootie according to the invention, a set of basic pattern pieces made of a layered structure comprising at least one membrane and an extension piece creating a top line of the upper at an ankle region of the user when in use are provided. The extension piece is connected to the set of basic pattern pieces along at least one first connection line to form the upper. For example, one first connection line can be located on the right side of the heel of the user and another first connection line can be located on the left side of the heel of the user. It is advantageous when the at least one first connection line lies outside of a heel region of the user when in use such that no seams or other connection types press against the user's heel and create a discomfort or even blisters.

[0039] A lining piece of a material that is, in most cases, more elastic than the material of the material of the basic pattern pieces is subsequently stitched to an edge of the extension piece along a top part of the lining piece at a second connection line. The lining piece is then flipped over the extension piece towards inside of the bootie. This way the lining piece covers the at least one first connection line and further protects the foot of the user from discomfort originating from the connection between the extension pieces and the basic pattern pieces. The extension piece creates the link between the basic pattern pieces and the lining piece and allows to compensate for differing material properties thereby avoiding folds and wrinkles.

[0040] It has proven advantageous in some circumstances to provide two extension pieces. The first extension piece is connected to the left side of the heel cord region and the second extension piece is connected to the right side of the heel cord region. The two extension pieces are thereby shaped such that a V-shaped recess is defined at the edge of the extension pieces opposite the first connection line. This can for example be obtained with slanted end of the extension pieces.

[0041] The shape of the lining piece does not necessarily match the shape of the at least one extension piece at the heel cord region. In such case, while the lining piece is stitched to each extension piece, the heel cord region is left out and the lining is not stitched to the extension pieces at the V-shaped recess.4. Description of the figures

[0042] In the following, the invention will be described in more detail with reference to the following figures: Fig. 1a:shows a sideview of a known bootie; Fig. 1b:shows a cut through a shoe with the known bootie of Fig.1; Fig. 2:shows the basic pattern pieces to create a known bootie; Fig. 3:shows a detail of the interior of a known bootie at a heel region; Fig. 4:shows a detail of an unfinished, known bootie; Fig. 5:shows the basic pattern pieces for an example bootie according to the invention; Fig. 6:shows a detail of a cut through a shoe with an example bootie according to the invention; Fig. 7:shows a detail of the interior of an example bootie according to the invention at the heel region; Fig. 8a:shows a detail of an unfinished, different example bootie according to the invention; Fig. 8b:shows another detail of the example bootie according to Fig. 8a; Fig. 9:shows an example shoe with a high mid-cut construction; Fig. 10:shows an example shoe with a low mid-cut construction. 5. Detailed description of the preferred embodiments

[0043] In the following, only some possible embodiments of the invention are described in detail. However, the present invention is not limited to these, and a multitude of other embodiments are applicable without departing from the scope of the invention. The presented embodiments can be modified in several ways and combined with each other whenever compatible and certain features may be omitted in so far as they appear dispensable. In particular, the disclosed embodiments may be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0044] It is to be understood that not all features of the described aspects / embodiments must be present for realizing the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments may be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically, the skilled person will understand that features, and / or functional elements of one aspect / embodiment can be combined with technically compatible features, and / or functional elements of any other aspect / embodiment of the present disclosure given that the resulting combination falls within the definition of the present disclosure.

[0045] While the embodiments below are described primarily with reference to a bootie for an upper for an article of footwear, in particular for a sports shoe, the skilled person will recognize that the disclosure according to the invention can equally be applied in a plurality of different technical fields and / or use cases. For example, the membrane approach could also be used for outdoor clothing like outerwear such as waterproof jackets, softshell jackets, ski or snowboard jackets, rain pants, 3-in-1 jackets, mountaineering shells or rain ponchos, and technical fabrics like gloves, tents shelters or backpacks and bags, to provide specific performance features such as waterproofing, wind proofing, and breathability.

[0046] Throughout the present figures and specification, the same reference numerals refer to the same elements. For the sake of clarity and conciseness, certain features, parts, elements, aspects, components and / or steps of certain embodiments are presented without undue detail where such detail would be apparent to the skilled person in the art considering the teachings herein and / or where such detail would obfuscate an understanding of more pertinent aspects of the embodiments.

[0047] As understood by the skilled person and / or to avoid redundancies, reference is also made to the explanations in the preceding sections, which also apply to the following detailed description. Further, not all features, parts, elements, aspects, components and / or steps are expressly indicated by reference signs for the sake of brevity and clarity. This particularly applies, where the skilled person recognizes that such features, parts, elements, aspects, components and / or steps are present in a plurality.Description of figures

[0048] Figures 1a, 1b, 2, 3 and 4 show a bootie 1 comprising a membrane material according to known constructions. Figure 1a shows a known bootie 1 in a sideview.

[0049] A lateral pattern 11 is connected to a collar top lining pattern 16 at an ankle assembly line 191. The lateral pattern 11 is further connected to a medial pattern 12 (not shown in figure 1) at the front of the bootie and at the back of the bootie via a heel assembly line 192. At the front of the bootie, a tongue top lining pattern 15 is connected to the lateral pattern 11 and the medial pattern 12 (not shown in figure 1). Generally, the lateral pattern and the medial pattern are connected via a sewn connection, for example with a single stich, Strobel stitch or a zigzag stich. Other ways of connection can also be envisaged, such as glueing, soldering.

[0050] Figure 1b shows a cut through a shoe with a known bootie 1' similar to the bootie 1 of figure 1.

[0051] The ankle assembly line 191 from collar top lining pattern 16 to the medial pattern 12 is exposed at the inside of the bootie 1. The cut goes through the heel assembly line 192 at which the lateral pattern 11 is connected to the medial pattern 12 at the heel region. The shoe further has an outer shell 3 covering the bootie 1 and a sole 4 attached to the lower part of the bootie 1.

[0052] Figure 2 shows the set of basic pattern pieces forming a known bootie similar to the bootie 1 and 1' shown in figures 1a and 1b.

[0053] The shown set of basic pattern pieces includes a lateral pattern 11, a medial pattern 12, a gasket pattern 13, a bootie insole pattern 14, a tongue top lining pattern 15, a collar top lining pattern 16.

[0054] In the shown example, the lateral pattern 11, the medial pattern 12 and the bootie insole pattern 14 are made of a layered structure comprising at least one membrane.

[0055] The tongue top lining pattern 15 and the collar top pattern 16 can be made of different material and do not necessarily comprise a membrane. For example, for these pattern pieces, a higher elasticity than offered by a layered structure can be required. Additionally, if at the location of these pattern pieces, waterproofness is not essential, a cheaper material can be used.

[0056] The bottom gasket pattern 13 is designed to reliably seam-seals the connection between lateral pattern 11, medial pattern 12 and the bootie insole pattern 14.

[0057] Figure 3 shows a detail of the interior of a known bootie with the ankle assembly line 191 between collar top lining 16 and the lateral pattern 11 and the medial pattern 12.

[0058] Furthermore, the heel assembly line 192 between lateral pattern 11 and medial pattern 12 is shown. As these assembly lines can be harder that the surrounding material, or protruding, they can create discomfort or even blisters and sore feet for the user. This is one issue of known booties that the invention seeks to remedy.

[0059] Figure 3 further shows that the lateral pattern 11 and the medial pattern 12 are connected to a bootie insole pattern 14 at the bottom of the bootie 1 following a path called fourth connection line 196.

[0060] Another issue with known booties is illustrated in figure 4. Due to the differing material properties between the collar top lining 16 and the lateral pattern 11 and the medial pattern 12, the material of the lateral and medial pattern 11, 12 creates folds and wrinkles 121, 111.

[0061] Figure 5 shows the set of basic pattern pieces forming an example bootie according to the invention.

[0062] The main difference to the known bootie as shown in figures 1a to 4 is that the collar top lining pattern 16 from known booties 1 and 1' is replaced by an extension piece 27 and a lining piece 28.

[0063] In known booties comprising membrane material, the heel assembly line 192 at the heel region is quite stiff due to two membrane material pattern pieces being connected to each other.

[0064] In the bootie according to the invention, the heel assembly 292 line (as shown in figure 6) is covered by the lining piece 28. As such, the material for the extension piece at the ankle region can be chosen according to the desired properties, such as elasticity, softness, thickness, etc.

[0065] The two extension pieces are slanted towards each other. Due to the slanted edge, the extension piece defines a V-shaped recess 271. This eliminates one layer at the heel cord region, making the bootie less bulky and potentially uncomfortable for the user.

[0066] The lining piece 28 can include a collar top foam 284.

[0067] Figure 6 shows a detail of a cut through a shoe with an example bootie according to the invention.

[0068] The cut through the heel region of the shoe reveals the following layers from left to right: the lining piece 28 together with collar top foam 284 constitutes a first layer, the next layer is embodied by the extension piece 27 and the lateral pattern 21 (not shown) and medial pattern 22 at their heel assembly line 292.

[0069] Finally, the third layer covers the bootie from the outside with an outer shell 3 of the shoe.

[0070] From this detail, it can be appreciated how the lining piece covers up all potentially uncomfortable seams at the heel. The second connection line 294 defines the top line of the bootie at the ankle region of the user when in use. The bootie is fixed to the sole 4 via a Strobel pattern 41 to form the shoe.

[0071] Figure 7 shows a detail of a lining piece 28 covering the heel.

[0072] In the shown example, the inner full heel lining piece 28 is glued to the lateral pattern 21 and to the medial pattern 22 at side edges 281 of the lining piece.

[0073] To reliably secure the position of the lining piece 28, it is sewn to the bootie insole pattern 24 on a bottom part 282 of the lining piece 28 with a zigzag stich at a third connection line 295 between lining piece 28 and insole pattern 24.

[0074] Also, the lateral pattern 21 and the medial pattern 22 are sewn to the bootie insole pattern 24 by means of a zigzag stich at a fourth connection line 296 between lateral pattern 21 and medial pattern 22 and the bootie insole pattern 24. A zigzag stich allows to keep the connection between the pattern pieces flat as the connection can be made edge-to-edge.

[0075] The top part 283 of the lining piece 28 is sewn to the extension piece 27 (not shown in figure 7) at the second connection line 294 and flipped over it.

[0076] The lining piece 29 (not shown in figure 7) can include a top collar foam 284 inserted or otherwise secured to it. The top collar foam 284 can be especially designed to improve the comfort of the user while ensuring good hold of the ankle and the heel when the shoe is used. Because the top collar foam 284 is firmly secured to the lining piece 28, it cannot slide down or change position, which could potentially create discomfort. Furthermore, the top collar foam 284 can be added to the lining piece 28 before it is connected to the rest of the bootie 2, which facilitates the production process.

[0077] In figure 8a, the embodiment of the two extension pieces 27 is illustrated in a detail of an unfinished bootie.

[0078] In the unfinished bootie one extension piece 27 is connected to the lateral pattern 21 and one is connected to the medial pattern 22. The two extension pieces 27 are slanted towards the heel assembly line 292 of the lateral pattern 21 and the medial pattern 22. Two extension pieces 27 have the advantage that each extension piece 27 can be sewn to the lateral pattern 21, respectively medial pattern 22, before the lateral pattern 21 and the medial pattern 22 are sewn together at the heel assembly line 292. This facilitates the production.

[0079] Figure 8b shows a detail of the bootie in a later stage of production where the lining piece 28 is added to the bootie construction.

[0080] In particular, it is visible that the lining piece 28 is not connected to the extension pieces 27 at the V-shaped recess 271, because in this part of the bootie the edges of the extension pieces 27 and the edges of the lining piece 28 are not aligned.

[0081] Extension pieces 27 and lining piece 28 are only connected at the "upper lining piece" where their edges are aligned.

[0082] A tab 285 of the lining piece 28 covers the V-shaped recess 271 at the heel cord region of the user. Therefore, even if the V-shaped recess of the extension pieces 27 is not visible from the finished bootie, it still provides a thinner construction at the heel cord region. In figures 8a and 8b two extension pieces 27 are shown in defining the V-shaped recess 271. Alternatively, the extension piece can be made of a single piece sporting a V-shaped recess in the middle.

[0083] Figure 9 relates to example high mid-section shoes 5 comprising a bootie according to the invention. The high mid-section shoe 5 as shown in figure 9 has a shaft covering the ankle to protect the foot while hiking. The corresponding extension piece is designed to cover the whole ankle region of the user's foot, the extension piece being designed to surround the ankle.

[0084] In comparison, figure 10 relates to example low mid-section shoes 6. In low mid-section shoes 6 the corresponding extension piece does not cover the ankle.List of reference signs

[0085] 1, 1'bootie as known from the prior art 2bootie according to the invention 11, 21lateral pattern 12, 22medial pattern 111, 121folds and wrinkles 13, 23bottom gasket pattern 14, 24bootie insole pattern 15, 25tongue top lining pattern 16collar top lining pattern 27extension piece 271V-shaped recess 28lining piece 281side edges of the lining piece 282bottom part of the lining piece 283top part of the lining piece 284collar top foam 285tab 191ankle assembly line (between collar top lining pattern 17 and lateral pattern 11 and / or medial pattern 12 at the ankle region) 192, 292heel assembly line (between lateral pattern 11, 21 and medial pattern 12, 22 at the heel region) 293first connection line (between extension piece 27 and lateral pattern 21 and medial pattern 22) 294second connection line (between the top part 283 of the lining piece 28 and the extension piece 27) 295third connection line (between lining piece 28 and bootie insole pattern 24) 196, 296fourth connection line (between bootie insole pattern 24 and lateral pattern 21 and / or medial pattern 22) 3outer shell of the shoe 4sole 41Strobel pattern 5high mid-section shoe 6low mid-section shoe

Examples

Embodiment Construction

[0043]In the following, only some possible embodiments of the invention are described in detail. However, the present invention is not limited to these, and a multitude of other embodiments are applicable without departing from the scope of the invention. The presented embodiments can be modified in several ways and combined with each other whenever compatible and certain features may be omitted in so far as they appear dispensable. In particular, the disclosed embodiments may be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0044]It is to be understood that not all features of the described aspects / embodiments must be present for realizing the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments may be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically,...

1. Field of the invention

[0001] The present invention relates to an inner lining bootie for an upper of an article of footwear, in particular for a sports shoe. The bootie comprises a set of basic pattern pieces with at least one membrane to ensure waterproofness and breathability of the article of footwear and an extension piece made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie at an ankle region, ensuring the comfort of the finished shoe at the heel region. The bootie also comprises a lining piece stitched to the at least one extension piece along a top part of the lining piece, wherein the lining piece covers the at least one extension piece and the set of basic pattern pieces on the inside of the bootie when in use such that the lining piece covers the at least one first connection line, and wherein the at least one extension piece thereby creates a link between basic pattern pieces and lining piece.

[0002] The present invention also relates to an upper with such a bootie and to a shoe, in particular for a sports shoe, with such an upper as well as a method of producing such a bootie.2. Prior art

[0003] A shoe is commonly described as the combination of an upper and a sole. Typically, the upper covers regions such as the instep, the toe, the medial side, the lateral side, and the heel of a wearer's foot and provides an opening to allow the wearer to step inside the footwear.

[0004] From document EP 3 308 667 B1 an article of footwear is known, which incorporates a textile upper. The upper comprises a knitted component. The knitted component may be warp knitted. The knitted component has an outer side and an inner side that can have different knit configurations. The knitted component can also incorporate portions of a single layer construction and portions of a double layer construction. The double layer construction forms pockets on portions of the knitted component. Inserts can be placed into the pockets to provide support, stability, or other desired properties to the portions of the knitted component.

[0005] Additionally, in document EP 2 001 319 B1, interior members for foot-receiving devices, such as bootie elements for articles of footwear, are disclosed. These interior members include a material element at least partially defining a foot-receiving chamber. This material element may include, in some examples, a heel-surrounding portion, a lateral side portion, a medial side portion, and a seamless plantar portion in a continuous, one-piece arrangement. Additionally or alternatively, in some examples, the material element may include a heel-surrounding portion, a lateral side portion, a medial side portion, a plantar surface, and a double layer of the material element at least along an Achilles area portion. Additional aspects relate to material blanks for forming such interior members as well as to foot-receiving devices, such as athletic footwear, including such interior members.

[0006] Membrane materials have properties such as waterproofness, breathability, wind tightness and elasticity which are desirable in the field of sports apparel and of shoes in general. These qualities have made them preferred material in several applications. Membrane materials are often used to provide a waterproof insert to a shoe.

[0007] Known inserts for hiking shoes, such as bootie constructions, usually comprise a lateral part for the outer side of the foot and a medial part for the inner side of the shoe, both comprising a membrane to provide for waterproofness, which are sewn together at a heel center region. Additionally, a collar top lining, defining the top line of the bootie at an ankle region and often made of a smoother material, is sewn to the lateral and medial part of the bootie. Because of the location of the seams, facing the inside of the shoe and in regions which are prone to stress when the shoe is used, and because the material of the bootie parts often does not allow to build smooth seams, the seams have been experienced as uncomfortable and, due to bulky areas, as creating pressure on the foot by many users. Attempts have been made to improve the quality of the seams, but it remains a real challenge in mass production environments.

[0008] Therefore, subject of the present invention is to provide a new bootie for an upper and for a shoe which minimizes or eliminates the above-described problems. It is a further object of the invention to provide a bootie which ensures watertightness, sufficient vapor permeability and high wearing comfort. Additionally, it is an object of the present invention to propose an upper with said bootie with which a shoe is watertight and still is comfortable even during intensive use.3. Summary of the invention

[0009] The above-mentioned objects are at least partially achieved by the subject matter of the independent claims. Preferred embodiments are subject of the dependent claims, and other suitable aspects of the present invention are described through the overall disclosure of the present application. It is noted that the headlines in the present disclosure are provided solely for the purpose to assist in keeping an overview during reading. The headlines do not mean that features of the respective embodiments cannot be combined.Definitions

[0010] The term "membrane" as used herein may refer to a specialized layer or coating applied to fabric to impart specific functional properties, such as waterproofing, breathability, or insulation. Membranes are thin, flexible, and typically made from polymers or other synthetic materials. They are designed to alter the performance characteristics of the fabric, enhancing its functionality for various applications. They may function as a kind of selective filter that is integrated into the fabric structure to perform specific filtration functions. Membranes can be applied to both natural and synthetic fabrics and are commonly used in outdoor apparel, sportswear, and technical textiles.

[0011] The term "elasticity" as used herein may refer to the property of a material that allows it to return to its original shape and size after being stretched or deformed. It is a measure of how well a material can withstand deformation and recover its initial form when the applied force is removed.

[0012] The term "vapor permeability" or "water vapor permeability" (WDD) as used herein, also related to the moisture vapor transmission rate (MVTR), is a measure of the ability of a material to allow water vapor to pass through it. It quantifies the rate at which water vapor diffuses or permeates through a material per unit of time and unit of area under specific conditions. Vapor permeability may typically be expressed with a Thermal Evaporative Resistance (RET) value defined by the ISO 11092 standard. The vapor permeability may also be expressed in units such as grams per square meter per day (g / m 2< / day) or grams per square meter per hour (g / m 2< / h). Various standardized test methods, such as ASTM E96, are used to measure vapor permeability.

[0013] The term "waterproofness" as used herein may refer to the property of a material or structure that prevents the passage or penetration of liquid water. It indicates the ability of a material to function as a barrier against water ingress, thereby protecting underlying surfaces or contents from moisture damage. Waterproofness is often quantified and evaluated through standardized testing methods, such as dynamic waterproof test (DIN EN ISO 5403), to determine the behavior of waterproof materials under dynamic stress water penetration test (AATCC 127, ISO 811) to determine the resistance of fabrics to water penetration under pressure wicking test to determine the capillarity absorption of water treated materials and components.

[0014] These tests assess the ability of a material to withstand water infiltration under controlled laboratory conditions.Bootie and shoe upper for an article of footwear

[0015] In one aspect, a bootie for an upper for an article of footwear, in particular for a sports shoe, is provided, which comprises a set of basic pattern pieces made of a layered structure comprising at least one membrane, and at least one extension piece made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie at an ankle region of the user when in use. The at least one extension piece is connected to the set of basic pattern pieces along at least one first connection line to form the bootie. The bootie further comprises a lining piece stitched to at least part of the upper edge of the at least one extension piece along a top part of the lining piece at a second connection line. The lining piece covers the at least one extension piece and the set of basic pattern pieces on the inside of the bootie when in use, such that the lining piece covers the at least one first connection line. This increases the comfort for the user, as protruding or rough parts are covered and cannot potentially create blisters anymore.

[0016] Technically, the at least one extension piece creates the link between the set of basic pattern pieces and lining piece. In other words, it is the interface between the set of basic pattern pieces and the lining piece. Because of its little thickness and high elasticity, the extension piece can compensate the differing material properties of lining piece and the set of basic pattern pieces. This way, a lining piece large enough to cover the at least one first connection line can be used while crumpling of the basic pattern pieces that may occur with a direct connection between lining piece and the set of basic pattern pieces can be avoided.

[0017] Therefore, while keeping the waterproof and vapor permeability properties on a high level, the bootie is more comfortable to the user because on the one hand, crumpling of the basic pattern pieces is avoided, and on the other hand, uncomfortable seams are covered up.

[0018] Additionally, a different, more suitable material regarding elasticity, stiffness, price, can be chosen for the extension piece, while keeping the desired properties of watertightness and breathability / vapor permeability in the basic pattern pieces. In particular, choosing a thin material for the extension piece contributes to render the shoe less bulky and stiff at the heel cord region, which is a location where the user often experiences sore feet.

[0019] Mostly the lining piece is made of a material having a higher elasticity than the material of the basic pattern pieces. This ensures a better fit on the inside of the shoe.

[0020] The choice of an extension piece therefore allows the combination of a waterproof and breathable shoe, and a comfortable shoe designed to avoid blisters and other sores. Example membranes are often made from synthetic polymers such as polypropylene, polyethylene, polyamide (nylon), or polytetrafluoroethylene (PTFE) or expanded PTFE (ePTFE). These materials can be engineered to have further specific properties such as puncture resistance, stub resistance, hydrophilicity, hydrophobicity, chemical resistance, and mechanical strength to suit different filtration requirements. The following materials for the membrane of the basic pattern pieces can be chosen according to the desired membrane thickness, waterproofness and vapor permeability: polyvinylidene fluoride or polyvinylidene difluoride (PVDF), polychlorotrifluoroethylene (PCTFE or PTFCE), polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), paraformaldehyde (PFA), polyvinyl fluoride (PVF), polyether ether ketone (PEEK), polyethylene naphthalate (PEN), fluorinated ethylene propylene (FEP), polyethylene terephthalate (PET, PETE), polytetrafluoroethylene (PTFE), polyetherimide (PEI), nylon 6 or polycaprolactam and polyimide (Kaption, PI).

[0021] To secure the lining piece within the bootie, side edges of the lining piece can be fixed by adhesive to the set of basic pattern pieces. This way, the basic pattern pieces are not perforated by the stiches and the watertightness of the bootie is not compromised. Additionally, no additional bulk is created on the edges, as opposed to when side edges are fixed by stitching. This further improves the comfort for the user.

[0022] Such a lining piece covers the heel region, which is highly exposed to mechanical stress when the user is in motion. To make sure that the lining piece does not move, advantageously a bottom part of the lining piece is connected via zigzag stitching to the set of basic pattern pieces along a third connection line. With a zigzag stich the connection between lining piece and basic pattern pieces is securely made and the connection is sufficiently stretchable to allow for movement without breaking. It further allows a flat seam together with holding back single threads that might become loose at the edge of the lining pieces.

[0023] When adding a lining piece to the bootie, one advantage is that a collar top foam can be included in the upper part of the lining piece next to a second connection line where it is connected to the extension piece. Such a collar top foam improves the comfort of the shoe for the user, and it can add hold the foot of the user at the ankle region to prevent injury.

[0024] Advantageously, the lining piece is connected to the at least one extension piece via a zigzag stitch along a second connection line. A zigzag stitch has the advantage of being stretchable while holding two different pieces of fabric securely together. This additionally allows to compensate part of the different material properties of the joined fabrics. The second connection line is flattest when the two pieces of fabric that are to be joined are abutted, i.e. joined edge-to-edge, when connected via said zigzag stitch.

[0025] Similarly, to connect the extension piece to the basic pattern pieces, preferably a zigzag stitch is used at the first connection line. Again, the zigzag stitch has the advantage of being stretchable while holding two different pieces of fabric securely together. Also here, to obtain a flat bootie at the first connection line, the extension piece and the basic pattern pieces are preferably abutted, i.e. joined edge to edge when connected via said zigzag stitch.

[0026] It has proven advantageous when the at least one extension piece defines a V-shaped recess at the open edge of the extension piece opposite the first connection line. Such a V-shaped recess is located at the center of the heel region of the user when in use, such that at least one extension piece spares out at least part of the heel cord region of the user when in use. As this heel cord region is prone to sores for many users, minimizing the bulk at this location has shown to reduce the potential blisters and similar.

[0027] With two extension pieces respectively connected to the set of basic pattern pieces on the left side and on the right side of the heel cord region of the user when in use, the V-shaped recess can easily be created. To this end, the ends of the two extension pieces could for example be slanted. An advantage of two extension pieces is that they can further facilitate the production process of the bootie, because it allows connecting the extension pieces to the set of basic pattern pieces before these basic pattern pieces are sewn together.

[0028] At the heel cord region, the lining piece may not have the same shape as the extension piece. In such a case, the lining piece is not stitched to the at least one extension piece in the region of the V-shaped recess. Instead, it is only fixed to the extension piece along the edges that match in shape.

[0029] In some embodiments, the at least one extension piece is designed to cover at least more than half of the ankle region of the user when in use. This coverage strengthen the before mentioned advantages.

[0030] Booties are available in different heights depending on the function the shoe is designed for. Hiking shoes for example require a sturdier manufacturing and have a higher mid cut construction. The bootie according to the invention can also be designed for a hiking shoe. In such a case, the extension piece in designed to cover the ankle region of the user when in use. This ensures a reinforced ankle region to support the ankle of the user.

[0031] Of course, when the bootie according to the invention is designed for lightweight, low-cut shoes, the extension piece is designed to abut the ankle region of the user without covering it when in use.

[0032] The bootie of the invention includes a set of basic pattern pieces. Such a set may comprise a lateral pattern, a medial pattern, a bootie insole pattern and a bootie bottom gasket to seam-seal the bottom area of the bootie. These pattern pieces allow to create the desired 3d-shape of the bootie with a low number of single pieces. Thereby, for each pattern piece, a specific material can be chosen to enhance the properties that the bootie construction can offer.

[0033] If a sturdy shoe like a hiking shoe is desired, the bootie should also offer more support. This can be achieved with a bootie wherein at least part of the membrane of layered structure is designed to be freely floating, for example with respect to the outer shell of the upper.

[0034] Examples of material where the membrane is designed to be freely floating with respect to the outer shell are textiles composed of synthetic yarn such as PES (polyester including CDP / TPE and other polyester derivatives), PA (polyamide), TPU, EL / PU (elastane / PU content), textile from natural yarn such as cotton or cellulosic yarn such as lyocell. Cow leather, PU coated synthetic leather.

[0035] An example of a layered structure used in the bootie of the present invention comprises, as seen from the inside to the outside of the bootie when in use, a textile lining, a membrane layer, a backer textile such as a backer knit, a woven backer or similar. The textile lining can be one of polyester(PES and any other polyester derivatives such as CDP, TPE, TPEE), PA (polyamide), Elastane (PU / EL), lyocell, wool, cotton, the membrane layer can be one of polyethylene (PE), expanded polyethylene (EPe), thermoplastic polyurethane (TPU), polyurethane (PU), polyamide (nylon), polytetrafluoroethylene (PTFE) or expanded PTFE (ePTFE (PVDF), polychlorotrifluoroethylene (PCTFE or PTFCE), polyphenylene sulfide (PPS), ethylene tetrafluoroethylene (ETFE), paraformaldehyde (PFA), polyvinyl fluoride (PVF), polyether ether ketone (PEEK), polyethylene naphthalate (PEN), fluorinated ethylene propylene (FEP), polyethylene terephthalate (PET, PETE), polytetrafluoroethylene (PTFE), polyetherimide (PEI), nylon 6 or polycaprolactam and polyimide (Kaption, PI), the backer textile can be one of polyester(PES and any other polyester derivatives such as CDP, TPE, TPEE), PA (polyamide), Elastane (PU / EL), lyocell, wool, cotton. Climaproof booties, i.e. booties designed for especially harsh weather conditions, may have an additional layer of PU foam

[0036] In one aspect of the invention, an upper for an article of footwear, in particular for a sports shoe, comprising a bootie according to the invention is provided. The upper includes an upper material, such as one or more of textiles composed of synthetic yarn such as PES (polyester including CDP / TPE and other polyester derivatives), PA (polyamide), TPU, EL / PU (elastane / PU content), textile from natural yarn such as cotton or cellulosic yarn such as lyocell, cow leather, PU coated synthetic leather. Additionally, the upper can further comprise eyestays to add a lacing to the shoe, reflective details, heel tabs or tongues tabs to facilitate stepping in into the upper, protective overlays made from PU leather, real leather or TPU foil, TPU molded pieces, like e.g. cage or toe cap, heel counter, webbings for lacing made from textile or metal hooks, metal eyelets, knit collar pieces.

[0037] Generally, the upper comprising the bootie according to the invention can be turned into a shoe, in particular a sports shoe, by adding a sole. The shoe may further comprise an upper Strobel pattern to connect the upper to the sole. The Strobel pattern will add strength to the insole of the bootie when doubling up the bootie insole pattern. The Strobel pattern can further include a material with damping properties to protect the joints of the user.

[0038] To produce a bootie according to the invention, a set of basic pattern pieces made of a layered structure comprising at least one membrane and an extension piece creating a top line of the upper at an ankle region of the user when in use are provided. The extension piece is connected to the set of basic pattern pieces along at least one first connection line to form the upper. For example, one first connection line can be located on the right side of the heel of the user and another first connection line can be located on the left side of the heel of the user. It is advantageous when the at least one first connection line lies outside of a heel region of the user when in use such that no seams or other connection types press against the user's heel and create a discomfort or even blisters.

[0039] A lining piece of a material that is, in most cases, more elastic than the material of the material of the basic pattern pieces is subsequently stitched to an edge of the extension piece along a top part of the lining piece at a second connection line. The lining piece is then flipped over the extension piece towards inside of the bootie. This way the lining piece covers the at least one first connection line and further protects the foot of the user from discomfort originating from the connection between the extension pieces and the basic pattern pieces. The extension piece creates the link between the basic pattern pieces and the lining piece and allows to compensate for differing material properties thereby avoiding folds and wrinkles.

[0040] It has proven advantageous in some circumstances to provide two extension pieces. The first extension piece is connected to the left side of the heel cord region and the second extension piece is connected to the right side of the heel cord region. The two extension pieces are thereby shaped such that a V-shaped recess is defined at the edge of the extension pieces opposite the first connection line. This can for example be obtained with slanted end of the extension pieces.

[0041] The shape of the lining piece does not necessarily match the shape of the at least one extension piece at the heel cord region. In such case, while the lining piece is stitched to each extension piece, the heel cord region is left out and the lining is not stitched to the extension pieces at the V-shaped recess.4. Description of the figures

[0042] In the following, the invention will be described in more detail with reference to the following figures: Fig. 1a:shows a sideview of a known bootie; Fig. 1b:shows a cut through a shoe with the known bootie of Fig.1; Fig. 2:shows the basic pattern pieces to create a known bootie; Fig. 3:shows a detail of the interior of a known bootie at a heel region; Fig. 4:shows a detail of an unfinished, known bootie; Fig. 5:shows the basic pattern pieces for an example bootie according to the invention; Fig. 6:shows a detail of a cut through a shoe with an example bootie according to the invention; Fig. 7:shows a detail of the interior of an example bootie according to the invention at the heel region; Fig. 8a:shows a detail of an unfinished, different example bootie according to the invention; Fig. 8b:shows another detail of the example bootie according to Fig. 8a; Fig. 9:shows an example shoe with a high mid-cut construction; Fig. 10:shows an example shoe with a low mid-cut construction. 5. Detailed description of the preferred embodiments

[0043] In the following, only some possible embodiments of the invention are described in detail. However, the present invention is not limited to these, and a multitude of other embodiments are applicable without departing from the scope of the invention. The presented embodiments can be modified in several ways and combined with each other whenever compatible and certain features may be omitted in so far as they appear dispensable. In particular, the disclosed embodiments may be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0044] It is to be understood that not all features of the described aspects / embodiments must be present for realizing the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments may be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically, the skilled person will understand that features, and / or functional elements of one aspect / embodiment can be combined with technically compatible features, and / or functional elements of any other aspect / embodiment of the present disclosure given that the resulting combination falls within the definition of the present disclosure.

[0045] While the embodiments below are described primarily with reference to a bootie for an upper for an article of footwear, in particular for a sports shoe, the skilled person will recognize that the disclosure according to the invention can equally be applied in a plurality of different technical fields and / or use cases. For example, the membrane approach could also be used for outdoor clothing like outerwear such as waterproof jackets, softshell jackets, ski or snowboard jackets, rain pants, 3-in-1 jackets, mountaineering shells or rain ponchos, and technical fabrics like gloves, tents shelters or backpacks and bags, to provide specific performance features such as waterproofing, wind proofing, and breathability.

[0046] Throughout the present figures and specification, the same reference numerals refer to the same elements. For the sake of clarity and conciseness, certain features, parts, elements, aspects, components and / or steps of certain embodiments are presented without undue detail where such detail would be apparent to the skilled person in the art considering the teachings herein and / or where such detail would obfuscate an understanding of more pertinent aspects of the embodiments.

[0047] As understood by the skilled person and / or to avoid redundancies, reference is also made to the explanations in the preceding sections, which also apply to the following detailed description. Further, not all features, parts, elements, aspects, components and / or steps are expressly indicated by reference signs for the sake of brevity and clarity. This particularly applies, where the skilled person recognizes that such features, parts, elements, aspects, components and / or steps are present in a plurality.Description of figures

[0048] Figures 1a, 1b, 2, 3 and 4 show a bootie 1 comprising a membrane material according to known constructions. Figure 1a shows a known bootie 1 in a sideview.

[0049] A lateral pattern 11 is connected to a collar top lining pattern 16 at an ankle assembly line 191. The lateral pattern 11 is further connected to a medial pattern 12 (not shown in figure 1) at the front of the bootie and at the back of the bootie via a heel assembly line 192. At the front of the bootie, a tongue top lining pattern 15 is connected to the lateral pattern 11 and the medial pattern 12 (not shown in figure 1). Generally, the lateral pattern and the medial pattern are connected via a sewn connection, for example with a single stich, Strobel stitch or a zigzag stich. Other ways of connection can also be envisaged, such as glueing, soldering.

[0050] Figure 1b shows a cut through a shoe with a known bootie 1' similar to the bootie 1 of figure 1.

[0051] The ankle assembly line 191 from collar top lining pattern 16 to the medial pattern 12 is exposed at the inside of the bootie 1. The cut goes through the heel assembly line 192 at which the lateral pattern 11 is connected to the medial pattern 12 at the heel region. The shoe further has an outer shell 3 covering the bootie 1 and a sole 4 attached to the lower part of the bootie 1.

[0052] Figure 2 shows the set of basic pattern pieces forming a known bootie similar to the bootie 1 and 1' shown in figures 1a and 1b.

[0053] The shown set of basic pattern pieces includes a lateral pattern 11, a medial pattern 12, a gasket pattern 13, a bootie insole pattern 14, a tongue top lining pattern 15, a collar top lining pattern 16.

[0054] In the shown example, the lateral pattern 11, the medial pattern 12 and the bootie insole pattern 14 are made of a layered structure comprising at least one membrane.

[0055] The tongue top lining pattern 15 and the collar top pattern 16 can be made of different material and do not necessarily comprise a membrane. For example, for these pattern pieces, a higher elasticity than offered by a layered structure can be required. Additionally, if at the location of these pattern pieces, waterproofness is not essential, a cheaper material can be used.

[0056] The bottom gasket pattern 13 is designed to reliably seam-seals the connection between lateral pattern 11, medial pattern 12 and the bootie insole pattern 14.

[0057] Figure 3 shows a detail of the interior of a known bootie with the ankle assembly line 191 between collar top lining 16 and the lateral pattern 11 and the medial pattern 12.

[0058] Furthermore, the heel assembly line 192 between lateral pattern 11 and medial pattern 12 is shown. As these assembly lines can be harder that the surrounding material, or protruding, they can create discomfort or even blisters and sore feet for the user. This is one issue of known booties that the invention seeks to remedy.

[0059] Figure 3 further shows that the lateral pattern 11 and the medial pattern 12 are connected to a bootie insole pattern 14 at the bottom of the bootie 1 following a path called fourth connection line 196.

[0060] Another issue with known booties is illustrated in figure 4. Due to the differing material properties between the collar top lining 16 and the lateral pattern 11 and the medial pattern 12, the material of the lateral and medial pattern 11, 12 creates folds and wrinkles 121, 111.

[0061] Figure 5 shows the set of basic pattern pieces forming an example bootie according to the invention.

[0062] The main difference to the known bootie as shown in figures 1a to 4 is that the collar top lining pattern 16 from known booties 1 and 1' is replaced by an extension piece 27 and a lining piece 28.

[0063] In known booties comprising membrane material, the heel assembly line 192 at the heel region is quite stiff due to two membrane material pattern pieces being connected to each other.

[0064] In the bootie according to the invention, the heel assembly 292 line (as shown in figure 6) is covered by the lining piece 28. As such, the material for the extension piece at the ankle region can be chosen according to the desired properties, such as elasticity, softness, thickness, etc.

[0065] The two extension pieces are slanted towards each other. Due to the slanted edge, the extension piece defines a V-shaped recess 271. This eliminates one layer at the heel cord region, making the bootie less bulky and potentially uncomfortable for the user.

[0066] The lining piece 28 can include a collar top foam 284.

[0067] Figure 6 shows a detail of a cut through a shoe with an example bootie according to the invention.

[0068] The cut through the heel region of the shoe reveals the following layers from left to right: the lining piece 28 together with collar top foam 284 constitutes a first layer, the next layer is embodied by the extension piece 27 and the lateral pattern 21 (not shown) and medial pattern 22 at their heel assembly line 292.

[0069] Finally, the third layer covers the bootie from the outside with an outer shell 3 of the shoe.

[0070] From this detail, it can be appreciated how the lining piece covers up all potentially uncomfortable seams at the heel. The second connection line 294 defines the top line of the bootie at the ankle region of the user when in use. The bootie is fixed to the sole 4 via a Strobel pattern 41 to form the shoe.

[0071] Figure 7 shows a detail of a lining piece 28 covering the heel.

[0072] In the shown example, the inner full heel lining piece 28 is glued to the lateral pattern 21 and to the medial pattern 22 at side edges 281 of the lining piece.

[0073] To reliably secure the position of the lining piece 28, it is sewn to the bootie insole pattern 24 on a bottom part 282 of the lining piece 28 with a zigzag stich at a third connection line 295 between lining piece 28 and insole pattern 24.

[0074] Also, the lateral pattern 21 and the medial pattern 22 are sewn to the bootie insole pattern 24 by means of a zigzag stich at a fourth connection line 296 between lateral pattern 21 and medial pattern 22 and the bootie insole pattern 24. A zigzag stich allows to keep the connection between the pattern pieces flat as the connection can be made edge-to-edge.

[0075] The top part 283 of the lining piece 28 is sewn to the extension piece 27 (not shown in figure 7) at the second connection line 294 and flipped over it.

[0076] The lining piece 29 (not shown in figure 7) can include a top collar foam 284 inserted or otherwise secured to it. The top collar foam 284 can be especially designed to improve the comfort of the user while ensuring good hold of the ankle and the heel when the shoe is used. Because the top collar foam 284 is firmly secured to the lining piece 28, it cannot slide down or change position, which could potentially create discomfort. Furthermore, the top collar foam 284 can be added to the lining piece 28 before it is connected to the rest of the bootie 2, which facilitates the production process.

[0077] In figure 8a, the embodiment of the two extension pieces 27 is illustrated in a detail of an unfinished bootie.

[0078] In the unfinished bootie one extension piece 27 is connected to the lateral pattern 21 and one is connected to the medial pattern 22. The two extension pieces 27 are slanted towards the heel assembly line 292 of the lateral pattern 21 and the medial pattern 22. Two extension pieces 27 have the advantage that each extension piece 27 can be sewn to the lateral pattern 21, respectively medial pattern 22, before the lateral pattern 21 and the medial pattern 22 are sewn together at the heel assembly line 292. This facilitates the production.

[0079] Figure 8b shows a detail of the bootie in a later stage of production where the lining piece 28 is added to the bootie construction.

[0080] In particular, it is visible that the lining piece 28 is not connected to the extension pieces 27 at the V-shaped recess 271, because in this part of the bootie the edges of the extension pieces 27 and the edges of the lining piece 28 are not aligned.

[0081] Extension pieces 27 and lining piece 28 are only connected at the "upper lining piece" where their edges are aligned.

[0082] A tab 285 of the lining piece 28 covers the V-shaped recess 271 at the heel cord region of the user. Therefore, even if the V-shaped recess of the extension pieces 27 is not visible from the finished bootie, it still provides a thinner construction at the heel cord region. In figures 8a and 8b two extension pieces 27 are shown in defining the V-shaped recess 271. Alternatively, the extension piece can be made of a single piece sporting a V-shaped recess in the middle.

[0083] Figure 9 relates to example high mid-section shoes 5 comprising a bootie according to the invention. The high mid-section shoe 5 as shown in figure 9 has a shaft covering the ankle to protect the foot while hiking. The corresponding extension piece is designed to cover the whole ankle region of the user's foot, the extension piece being designed to surround the ankle.

[0084] In comparison, figure 10 relates to example low mid-section shoes 6. In low mid-section shoes 6 the corresponding extension piece does not cover the ankle.List of reference signs

[0085] 1, 1'bootie as known from the prior art 2bootie according to the invention 11, 21lateral pattern 12, 22medial pattern 111, 121folds and wrinkles 13, 23bottom gasket pattern 14, 24bootie insole pattern 15, 25tongue top lining pattern 16collar top lining pattern 27extension piece 271V-shaped recess 28lining piece 281side edges of the lining piece 282bottom part of the lining piece 283top part of the lining piece 284collar top foam 285tab 191ankle assembly line (between collar top lining pattern 17 and lateral pattern 11 and / or medial pattern 12 at the ankle region) 192, 292heel assembly line (between lateral pattern 11, 21 and medial pattern 12, 22 at the heel region) 293first connection line (between extension piece 27 and lateral pattern 21 and medial pattern 22) 294second connection line (between the top part 283 of the lining piece 28 and the extension piece 27) 295third connection line (between lining piece 28 and bootie insole pattern 24) 196, 296fourth connection line (between bootie insole pattern 24 and lateral pattern 21 and / or medial pattern 22) 3outer shell of the shoe 4sole 41Strobel pattern 5high mid-section shoe 6low mid-section shoe

Examples

Embodiment Construction

[0043]In the following, only some possible embodiments of the invention are described in detail. However, the present invention is not limited to these, and a multitude of other embodiments are applicable without departing from the scope of the invention. The presented embodiments can be modified in several ways and combined with each other whenever compatible and certain features may be omitted in so far as they appear dispensable. In particular, the disclosed embodiments may be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0044]It is to be understood that not all features of the described aspects / embodiments must be present for realizing the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments may be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically,...

Claims

1. Bootie (2) for an upper of an article of footwear, in particular for a sports shoe, comprising - a set of basic pattern pieces made of a layered structure comprising at least one membrane; - at least one extension piece (27) made of thinner and more elastic material than the material of the basic pattern pieces and at least partially creating a top line of the bootie (2) at an ankle region of the user when in use; the at least one extension piece (27) being connected to the set of basic pattern pieces along at least one first connection line (293), the bootie (2) further comprising - a lining piece (28) being stitched to the at least one extension piece (27) along a top part (283) of the lining piece (28), the lining piece (28) covering the at least one extension piece (27) and the set of basic pattern pieces on the inside of the bootie (2) when in use, such that the lining piece (28) covers the at least one first connection line (293); the at least one extension piece (27) thereby creating a link between basic pattern pieces and lining piece (28).

2. Bootie (2) according to the preceding claim, wherein the lining piece (28) has a higher elasticity than the material of the set of basic pattern pieces and / or wherein side edges (281) of the lining piece (28) are fixed by adhesive to the set of basic pattern pieces.

3. Bootie (2) according to any preceding claim, wherein a bottom part (282) of the lining piece (28) is connected via zigzag stitching to the set of basic pattern pieces along a third connection line (295).

4. Bootie (2) according to any preceding claim, wherein the lining piece (28) includes a collar top foam (284).

5. Bootie (2) according to any preceding claim, wherein the lining piece (28) is connected via a zigzag stitch to the at least one extension piece (27) along a second connection line (294), wherein the lining piece (28) and the at least one extension piece (27) are preferably abutted.

6. Bootie (2) according to any preceding claim, wherein the at least one extension piece (27) is connected via a zigzag stitch to the set of basic pattern pieces along the first connection line (293), wherein the at least one extension piece (27) and the set of basic pattern pieces are preferably abutted.

7. Bootie (2) according to any preceding claim, wherein the at least one extension piece (27) defines a V-shaped recess (271) at the open edge of the extension piece (27) opposite the first connection line (293), the V-shaped recess (271) being located at the center of the heel region of the user when in use, the at least one extension piece (27) thereby sparing out at least part of the heel cord region of the user when in use, wherein the bootie preferably comprises two extension pieces (27) respectively connected to the set of basic pattern pieces on the left side and on the right side of the heel cord region of the user when in use.

8. Bootie (2) according to claim 7, wherein the lining piece (28) is not stitched to the at least one extension piece (27) in the region of the V-shaped recess (271).

9. Bootie (2) according to any preceding claim, wherein the at least one extension piece (27) is designed to cover at least more than half of the ankle region of the user when in use or wherein the extension piece (27) is designed to follow the lower edge of the ankle region of the user without covering the ankle when in use.

10. Bootie (2) according to any preceding claim, wherein the set of basic pattern pieces comprises a lateral pattern (21), a medial pattern (22), a bootie insole pattern (24) and a bootie bottom gasket to seam-seal the bottom area.

11. Bootie (2) according to any preceding claim, wherein at least part of the membrane of the layered structure is designed to be freely floating and / or wherein the layered structure comprises, as seen from the inside to the outside of the bootie (2) when in use, a textile lining, a membrane layer, a backer knit, an upper material.

12. An upper for an article of footwear, in particular for a sports shoe, comprising a bootie (2) according to any preceding claim and an outer shell (3).

13. A shoe, in particular a sports shoe, comprising an upper according to the preceding claim.

14. Method of producing a bootie (2) according to any preceding claim 1 to 11, the method comprising the steps of - providing a set of basic pattern pieces made of a layered structure comprising at least one membrane; - providing at least one extension piece (27) made of thinner and more elastic material than the material of the basic pattern pieces and designed to at least partially creating a top line of the bootie (2) at an ankle region of the user when in use; - connecting the at least one extension piece (27) to the set of basic pattern pieces along at least one first connection line (293); - providing a lining piece (28) preferably made of a material that is more elastic than the material of the basic pattern pieces; - stitching the lining piece (28) to the at least one extension piece (27) along a top part (283) of the lining piece (28) at a second connection line (294); and - flipping over the at least one extension piece (27) towards inside of the bootie (2) when in use, such that the lining piece (28) covers the at least one first connection line (293); the at least one extension piece (27) thereby creating a link between basic pattern pieces and lining piece (28).

15. Method of producing a bootie (2) according to claim 14, wherein the method further comprises the steps of - providing two extension pieces (27); - connecting the first extension piece to the left side of the heel cord region and the second extension piece to the right side of the heel cord region, the two extension pieces (27) being shaped such that a V-shaped recess (271) is defined at the edge of the extension pieces (27) opposite the first connection line (293), and wherein preferably the method further comprises the step of - stitching the lining piece (28) to each extension piece (27), whereby the lining is not stitched to the extension pieces (27) at the V-shaped recess (271).

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