Structure and method for making shoe with knitted upper

Abstract

To provide a structure and method for manufacturing a shoe with a knitted upper, capable of constructing the shoe with the knitted upper and a sole obtained by direct injection of polyurethane substantially in a single manufacturing sequence.SOLUTION: A method for making a shoe with a knitted upper includes: a first step of weaving / constructing an upper (2) composed of a double stocking; and a second step followed thereby, the second step of forming the upper, in which the two stockings are a kind of "tube" closed on one side (a tip part), while the other end of the tube remains open, where the inner stocking is placed on an optimal last and the outer stocking is turned inside out and superposed on the preceding stocking to form a double layer, thus creating the shoe with the knitted upper.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a structure and method for making a shoe with a knitted upper that is particularly suitable for providing differentiated structures in terms of both volume and elasticity in various areas of the foot, ensuring optimal flexion and protection of the foot. [Background technology]

[0002] As is known, footwear is a clothing accessory that essentially consists of a sole, which is the lower part that protects food and comes into contact with the ground, and an upper, which is an upper part that generally consists of several parts that cover the foot and keep the sole in place. In particular, the upper can have different decorations, colors, and shapes and is joined to the sole by stitching or gluing. Furthermore, the upper is most often made of natural leather or synthetic materials, or others.

[0003] Additionally, footwear often has an upper, which is an interior portion that forms the space between the sole and the upper.

[0004] In fact, shoes are objects that have always been used to protect the feet when a user walks, runs, etc. Shoes are used to prevent impacts that can damage or fatigue the bone and / or muscle structure.

[0005] Currently, there are several types of shoes on the market, most of which are related to sports / casual shoes, which account for a large share of the market.

[0006] Today, there is an increasing specialization in the demand for the performance that shoes can provide and for increasingly technical features for the construction of the components that make up the shoe.

[0007] One type of shoe that has attracted a lot of interest and attention from users is shoes with a knitted upper.

[0008] The first shoes of this type were football boots with a knitted upper that was so soft it was defined as a kind of second skin, and in particular this knitted upper was covered with a thin layer of leather to protect the stitches.

[0009] While the shoes described above were very comfortable, various drawbacks became apparent over time, due to the delicate nature of the upper, its tendency to wear, and insufficient protection of areas of the foot that are susceptible to blowouts. Furthermore, the uppers had limited breathability and the structure of the uppers easily deformed with use. Indeed, some of the problems described above stem from the fact that, while the thickness of the fabric making up the upper is consistent, different parts of the foot require different levels of fabric grip, resistance, and density.

[0010] Subsequently, to overcome the limitations presented by the shoes mentioned above, manufacturers began to use inlay or circular machines to produce "stockings," which consist of two stocking structures joined at the tip, and insert a thermosetting yarn into the process. Once the process is complete, one stocking is turned inside out and placed on top of the other, and then subjected to a hardening and stabilizing process by passing it through a high-temperature steam kiln.

[0011] Another variety involves making stockings as previously described, but adding a third stocking made entirely of thermosetting material that is then inserted between the other two stockings.

[0012] Again, the structure is subjected to a hardening and stabilization process by passing through a high temperature steam kiln.

[0013] Shoes made according to the method disclosed above have significant drawbacks due to the limited elasticity and breathability due to the presence of thermosetting yarns throughout the weave, making the upper part of the footwear hard and rather rigid. It has also been found that the three-dimensional design, which is essential for following and structuring the dynamics of the foot, has important limitations, namely flexibility in certain areas, protection of the toe zone, torsional stability of the heel, and accommodation of the foot.

[0014] In addition to those mentioned above, the sole that completes a shoe with an upper of the type mentioned above is glued together, which entails several problems: stiffness, limited grip between the components due to movement, and the penetration of the adhesive into the knitted fabric, which makes it uncomfortable to touch and hard on the skin of the foot. Another method of joining the sole and the upper is by stitching, which has also been shown to cause problems due to the abrasion caused by the stitch threads on the knitted fabric of the upper. Furthermore, problems have been detected in both assembly methods due to the rather stiff nature of the sole, which is molded with a relatively large thickness, which limits and reduces the flexibility of the shoe and significantly reduces the comfort of the user.

[0015] In particular, the applicant is aware of U.S. Patent Application No. 2017 / 0181501, which describes a shoe made using the aforementioned technology, in which the upper is composed of two stockings, one inside out and placed over the other, with an insert interposed to improve the comfort of the foot in contact with the sole and a structure that provides a surface for bonding with the sole. Furthermore, other functional elements are interposed between the two stockings, defined as an envelope, to improve specific functions and create a protective part for the foot. In particular, the construction of the upper provides for the presence of a structure that serves to accept laces for lacing the shoe to which the stockings are subsequently attached.

[0016] In particular, the cited patent application shows how the upper and sole are assembled together by adhesive or stitching techniques. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] U.S. Patent Application No. 2017 / 0181501 Summary of the Invention [Problem to be solved by the invention]

[0018] Additionally, this shoe still suffers from the aforementioned problems of wear to the upper when stitched, as well as the shoe's overall lack of flexibility and lack of protection in areas where it is needed.

[0019] In particular, it has been found that one need in the market is to be able to have shoes with flexible soles that are lightweight and have acceptable manufacturing costs, conditions that cannot be achieved with the methods currently used.

[0020] Furthermore, more careful users and demanding consumers have expressed a demand for shoes with a woven knit that can simultaneously provide suitable grip and protection for the foot in certain zones, in addition to footwear without discontinuities such as those of the cited patent application, where the presence of a functional element inserted between the two stockings makes some zones of the upper uneven, which over time and with prolonged use can cause discomfort to the foot and, due to applied pressure, can cause irritation that limits the wearability of the footwear.

[0021] As is known, today's users have a great interest in all clothing and clothing accessories that are comfortable, practical, functional, aesthetically pleasing in appearance and flexible in use. [Means for solving the problem]

[0022] The object of the present invention is to solve the problems of the prior art by overcoming the aforementioned details with a structure and a method for making a shoe with a knitted upper, which makes it possible to construct, essentially in a single manufacturing sequence, a shoe with a knitted upper and a sole obtained by direct injection of polyurethane.

[0023] A second object of the present invention is to have a structure and method for making a shoe with a knitted upper with a significant differentiated structure in terms of both volume and elasticity, with an upper that is elasticized, stiff, transparent, structured for containment, and / or set up for good flexion, with an optimal structuring of the area including the foot.

[0024] Another object of the present invention is to have a structure and a method for making a shoe with a knitted upper that can perfectly adapt to the shape of the foot, has differentiated functions and behaviors to meet all use needs, and allows the user to obtain, in addition to important flexibility of the sole, excellent restraint and grip of the foot, optimal breathability, crucially limited weight, support and great comfort when worn.

[0025] Another object of the present invention is to have a structure and method for making a shoe with a knitted upper with a sole made with direct injection technology to give the shoe flexibility and lightness by making the shoe a single body.

[0026] It is a further object of the present invention to create a construction and method for making a shoe having a structure with a sole that is lightweight and flexible, and above that, a non-wearing knitted upper.

[0027] The objective of the present invention to create a structure and method for making a shoe with a knitted upper that is easy to make and highly functional is not the least important.

[0028] These and other objects, which will become more apparent during the course of this specification, are substantially achieved by a structure and method for making a shoe with a knitted upper, as set forth in the following claims.

[0029] Further features and advantages will become more apparent from the detailed description of the structure and method for making a shoe with a knitted upper according to the present invention that follows, taken in conjunction with the accompanying drawings, which are provided by way of example only and are therefore not limiting. [Brief explanation of the drawings]

[0030] [Figure 1] 1 shows, diagrammatically and in side view, a shoe obtained by the method according to the invention; [Figure 2] 2 shows a schematic bottom view of the shoe upper of FIG. 1; [Figure 3] 1 shows a schematic representation of a shoe with an upper in contact with a sole. [Figure 3A] 1 shows a schematic side view of a sole according to an embodiment. [Figure 3B] 10 shows a schematic side view of a sole according to another embodiment. [Figure 4] 2 shows a schematic detail of the elements of the shoe of FIG. 1; [Figure 5] 1 shows a schematic exploded view of the components of a shoe obtained by the method in question. [Figure 6] 2 shows an enlarged detail of the shoe of FIG. 1 in cross section. [Figure 7] 2 shows a schematic cross-sectional side view of the shoe of FIG. 1; [Figure 8] 5 shows a bottom view of the element of FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0031] With reference to the figures cited, and in particular to FIG. 1, there is shown generally a shoe 1 with an upper and a sole obtained according to the invention.

[0032] The method (procedure) for making shoes with knitted uppers provides a series of steps, some of which are already used to make shoes currently on the market.

[0033] The first step is the weaving / construction of the upper 2, which is made by making a double stocking, starting from the tip of the foot, which is closed directly by the machine, continuing to the foot section, reaching the heel and ending at the edge, and then continuing with a series of parts opposite to those made previously, i.e. a second edge, heel and foot section, but ending at a second tip that is not closed.

[0034] The two stockings form a double-layered upper, almost like a double skin: one stocking forms the outer upper and is made using natural, synthetic, and / or blended yarns, while the other stocking forms the inner upper and is primarily made of a different type of yarn, preferably a natural yarn, such as wool, to provide other functions, such as breathability, comfort, and insulation. In addition to the yarns just mentioned, additional thermosetting polymeric yarns are added to the weaving, inserted into both stockings in clearly defined areas, during the entire upper manufacturing process, at different densities to provide differentiated properties in terms of elasticity, strength, and breathability, as shown in Figure 1. More specifically, a higher proportion of thermosetting polymeric yarns is used in the outer stocking, thereby imparting greater durability and resistance to the upper structure.

[0035] Furthermore, this allows the polymer threads used in the processing to act as a binder between the two stockings that are joined together, making up the upper as if it were a single piece.

[0036] The second step is to form the upper. In this step, the two previously constructed stockings form a kind of "tube" with one end closed (the tip that closes during processing) while the other end of the tube remains open. In this step, the inner stocking is placed on a suitable shoe last, and the outer stocking is rotated and placed over the inner stocking, forming a double-layer upper. More specifically, the first stocking is first placed with its closed end over the last, followed by an insert 3 made of rubber or another suitable material to act as a pad (collar) to reinforce and strengthen the rear edge of the shoe. Then, the second stocking, with its open end, is pulled over the first stocking, completely covering the last. Once the two stockings are joined, the outer stocking is retracted over the last, exposing the portion corresponding to the inner sole and allowing a heel reinforcement element 4 to be inserted between the outer stocking and the inner sole in a known manner.

[0037] In this embodiment, an insole 5 is positioned that can cover the entire area of ​​the last and has an arch structure that extends evenly on both sides of the last. The insole is configured to cover the last and slightly protrude beyond the contours of what will become the sole, as shown in Figure 3B.

[0038] The inserted insole 5 is made of thermoformed felt and has a series of slots 50 of suitable shape and position, the function of which is described below.

[0039] The outer stocking is then repositioned to close the upper by pulling the opening edge 20 under the toe attachment of the foot, as shown in FIG. 2, to fit perfectly over the last.

[0040] The next two steps are of a known type, in which the first stocking, defined as the upper placed on the last, is subjected to a steam jet that moistens and softens the thermosetting polymer yarns, allowing the upper to adhere better to the last and prepare the upper for the subsequent step, in which the upper is passed through a high-temperature kiln to dry out any remaining moisture from the previous step and to bring the thermosetting polymer yarns to a melting temperature, allowing the upper to return to the desired dimensions.

[0041] This point is followed by a step defined as the parking step, which is a transition step between the preceding and succeeding steps in which the upper placed on the last exits the kiln and travels on a roller conveyor to bring heat into the environment to reduce the temperature of the upper before moving to the succeeding step for stabilization, which further reduces the temperature.

[0042] More specifically, the parking step is a transition step whose role is to avoid too abrupt a thermal shock between the entry into the kiln and the following stabilization step.

[0043] In the stabilization step, the upper placed on the last is moved through a cryogenic freezer which stabilizes the thermoset polymer yarns, dimensionally fixing the upper. When the upper is at equilibrium with the ambient temperature, it is removed from the last and ready for the next step.

[0044] In the following step, the sole 7 is constructed over the upper by polyurethane injection molding.

[0045] The upper is placed over the mold last, where components that may be overprinted are positioned on the upper and can be secured by adhesive.

[0046] The upper placed on the last is then placed in a closed position between two mold rings during the polyurethane injection step 6.

[0047] The ring of the sole mold is closed partially around the upper to form an isolated cavity suitable for injecting polyurethane to form the sole.

[0048] Once everything is prepared as previously shown, the polyurethane injection 6 begins, with the presence of the arch structure 5 providing a barrier to limit the movement of polyurethane into the interior of the upper.

[0049] More specifically, the shape of the arch structure 5 prevents the injected polyurethane of the sole from passing through the inner stocking, but allows only a predetermined amount of polyurethane to pass through the slots 50. The amount of material passing through the slots allows for the creation of a bond between the sole and the upper, and in particular between the sole and the inner stocking, as shown in FIG.

[0050] Without the arch structure as configured, excessive amounts of polyurethane would seep into the upper, altering its functional and aesthetic characteristics. More precisely, the polyurethane passes minimally through the slots in the insole, and this movement is controlled and managed, creating a uniform adhesive bridge between the inner stocking of the upper and the sole injected into the upper to form the retaining hook 60.

[0051] Once the injection stage is complete, the sole mold ring opens and the finished shoe (upper and sole) is removed from the mold and then ejected from the last.

[0052] After a step to cut off any molding that may be sticking out from the sole, the shoe is ready.

[0053] The shoe resulting from the method (procedure) presented above has an upper, the manufacturing process of which has several types of processing, the upper being a completely seamless upper (without any stitches) and made in reverse processing (i.e. on the back of the fabric), which allows the structure to be diversified using certain retained thread characteristics suitable for changing the regularity, obtaining a three-dimensional weaving that gives the shoe its structural and functional characteristics.

[0054] In particular, during construction, the stocking provides, on the sides of the foot (fit), a series of ribs obtained with a specific weaving whose role is to give stability to the foot inside the shoe, since the series of ribs creates a kind of grip support for the sides of the foot, thus making redundant the intermediate reinforcing and protective elements that are necessary in prior art shoes.

[0055] Furthermore, in addition to what has been shown so far, during the construction of the double stocking, a process is carried out which generates an X structure 8 which allows the upper to provide significant and optimal restraint to the foot.

[0056] The stocking has an X-shaped construction, the intersection of which is positioned on the instep of the foot and the ends of which are located in front and behind on either side of the toes of the foot, the X having the function of providing containment and stability to the foot, such that containment structures are no longer necessary, for example, as defined in the U.S. patent applications cited at the beginning of this specification.

[0057] According to this embodiment, as already mentioned, the distribution of the heat-set yarns, studied and calibrated for every single part of the footwear, gives the upper very concentrated specific structural and functional characteristics.

[0058] As can be deduced from what has been previously explained, the shoe obtained by the illustrated process comprises an upper 2 formed by a pair of stockings, one turned inside out and placed on top of the other, inside which are located only stabilizing elements, such as a heel element 4 and collar padding elements 3, of a substantially known type, intended to protect and stiffen the inside of the stocking.

[0059] According to the invention, the arch structure 5 is formed, modifiable and adjustable with respect to the contour of the sole that is desired to be obtained in an aesthetic manner, as shown in FIG. 3A.

[0060] In fact, the arch structure, in its profile / cross section, is always parallel to the shape of the sole 7, as shown in Figures 3A and 3B, and always has its side edges 51 above the level of the sole by a certain amount.

[0061] Furthermore, the arch structure formed has an arched region that follows the shape of the plantar arch, as shown in FIG. 3B, and has side edges 51 that make it possible to protect both the user's foot and the inner stocking that constitutes the upper, as shown in FIG. 5.

[0062] As shown in Figure 4, the surface of the arch structure has a plurality of appropriately formed and positioned slots 50 with the precise function of creating points or sections that are dimensioned to secure and grip the stockings together between them, and the arch structure 5 and the sole 7, all in a single body.

[0063] According to this embodiment, as previously mentioned, the arch structure 5 is thermoformed to fit the shape of the foot and has side edges 51 that allow it to receive an outer stocking, and folded portions that reduce wear to be protected and give the foot a greater sense of comfort, protection and grip.

[0064] In particular, the side edges 51 of the arch structure create ridges for the upper that are positioned to be continuous between the sole and the upper, providing a uniform, continuous contour.

[0065] Furthermore, in addition to the fact that the arch structure is made from felt, a recycled material, which provides optimal adhesion, particular attention is paid to giving new life to materials already in use.

[0066] In particular, when polyurethane material is injected to create the sole, as shown in FIG. 6, retention hooks 60 are formed where the slots are located while the arch structure can receive the material so that a good bond is created between the outer stocking, the arch structure and the sole.

[0067] In fact, the arch structure 5 becomes a selective filter, a membrane, which makes it possible to obtain different properties according to the holes, their shape and size.

[0068] Selective and organized material movement is calibrated and controlled to provide both structural and functional specifications to the shoe, allowing for differentiated stiffness or flexibility characteristics depending on the type of use of the shoe.

[0069] As indicated in the U.S. patents cited at the beginning of this specification, shoes currently on the market assume the presence of an insole between the stockings to give body and stability to the structure, the insole being intended to be subsequently glued to join the upper and sole.

[0070] According to the present invention, a knitted upper 2 is obtained which has good inherent flexibility, together with a relatively thin injected sole 7 which is flexible in itself and, due to the method of the process, is much more flexible, making it very different from shoes which have a molded sole which is then glued or stitched.

[0071] The combination of these manufacturing methods results in a shoe with improved lightness, flexibility, and inter-part grip characteristics unlike those produced by prior art systems.

[0072] The method (procedure) in question is a manufacturing process that makes it possible to produce an object that is a single homogeneous and compact body, as opposed to what has been produced so far, which is not a single manufacturing process but merely a collection of separate parts constructed at different times.

[0073] As previously mentioned, conventional processes with separate construction steps result in discontinuities and non-uniformities in the construction of the shoe, which over time creates problems in both the level of structural grip of the shoe and the comfort of the components.

[0074] By this process it is even possible to obtain technical shoes, in the production of whose soles reinforcing or lightweight internal structural elements can be inserted, if necessary by gluing or by injected chemical grip, that give the shoe customized properties.

[0075] As mentioned before, all the different types of construction of the upper are obtained during processing, so there are no stitches that can cause discomfort, irritation or stress in the foot area.

[0076] In particular, the shoes are very practical to put on and take off, since there are no stitches in the delicate areas of the foot and no inserts for inserting laces, as occurs in current shoes.

[0077] Being disclosed primarily in an architectural sense, the operation of the present invention is as follows.

[0078] When a user wishes to walk or engage in sports, he or she simply puts on a pair of shoes according to the invention and uses the shoes in exactly the same manner as currently used shoes, except that the support of the various zones of the foot is differentiated from one part to another, comfort is optimized and varied according to the point of the foot, the air conditioning is also different from one zone to another, the heel is protected from impacts and blows, and other parts of the foot are protected, assisted and supported during various movements.

[0079] Therefore, the present invention achieves the above object.

[0080] This method (procedure) makes it possible to produce, in a single manufacturing sequence, a shoe with a knitted upper and a sole obtained by direct injection of polyurethane, thanks to the presence of an arch structure interposed between the two stockings that make up the upper.

[0081] Advantageously, the method (procedure) according to the present invention is used to create a shoe with a knitted upper having several different structures that are significant in terms of both volume and elasticity, with the upper having an optimal structure for each area, including the foot, that is elasticized, stiff, breathable, containment, or set up for good flexion.

[0082] Furthermore, this process makes it possible to create shoes with knitted uppers that can perfectly adapt to the shape of the foot, with differentiated functions and behaviors to meet all use requirements.

[0083] In particular, the method (procedure) for making shoes with knitted uppers has a sole made with direct injection technology, which makes it possible to give the shoes flexibility and lightness.

[0084] Another advantage of this process is that it produces shoes with a knitted upper that can provide the user with optimal grip on the foot, excellent breathability, crucially limited weight, support and great comfort when worn, as well as excellent flexibility of the sole.

[0085] Furthermore, the resulting shoe ensures restraint and grip for the foot.

[0086] The upper of said footwear is made in a single piece, finished in the machine without discontinuities and stitches, can perfectly adapt to the shape of the foot, has a differentiated processing and a differentiated knitting method in the processing that makes it possible to obtain footwear that offers excellent breathability with different ventilation zones and air circulation according to the need, and provides protection of the parts of the foot against possible blows and stresses with a harder or softer weaving, based on the need to give protection and comfort to the parts of the foot.

[0087] Another advantage of the upper according to the invention is that it can perfectly adapt to the shape of the foot without the uncomfortable thickness caused by functional inserts, as occurs in shoes of the prior art, making the user's movements safer and improving their performance, as it reduces obstructive and uncomfortable elements.

[0088] A further advantage results from the fact that the shoe is simple to make and very functional.

[0089] Naturally, the present invention is susceptible to many modifications and variations, all of which are within the scope of the inventive concept which characterizes the present invention.

Claims

1. 1. A process for making a shoe with a knitted upper, comprising: - weaving / constructing the upper (2) made by creating a double stocking including an inner stocking and an outer stocking; - forming said upper in which two previously constructed stockings have a tubular shape that closes at one end while the other end of the tube remains open, said inner stocking being placed on a shoe last and said outer stocking being turned inside out onto said preceding stocking to form a double layer; - subjecting the upper placed on the last to a steam jet that moistens and softens the thermosetting polymer yarns that make up the upper; - passing the upper through a kiln to dry out any moisture remaining from subjecting the upper to the steam jets and to return the upper to the desired dimensions by heating the thermosetting polymer yarns to a melting temperature; - moving the uppers on the lasts on a roller conveyor as they exit the kiln, bringing heat into the environment and reducing the temperature of the uppers on the lasts; - moving the upper placed on the last through a freezer that stabilizes the thermosetting polymer yarns to dimensionally fix the upper; - removing the upper from the last, wherein the upper is at ambient temperature when the upper is removed from the last; In a process including During the formation of the upper, an insole (5) is positioned, capable of covering the entire area of ​​the last and having an arch structure extending evenly on both sides of the last, said insole (5) being made of thermoformed felt and having a series of slots (50) formed and positioned to create fixing and gripping points for the stocking between them and between the insole (5) and the sole (7) of the shoe; - after the upper has been removed from the last, the sole (7) - inserting said upper into a mold last; - positioning the shoe last with the upper between two parts of the mold and closing the parts of the mold to partially enclose the upper and form a cavity isolated from the outside; - Injecting polyurethane into the cavity in the mold, the insole (5) forming a barrier in the cavity that limits the passage of the injected polyurethane inside the upper, so that a predetermined amount of the injected polyurethane passes only through the slots (50) of the insole (5), forming the fixing and gripping points between the sole (7) and the insole (5) and the inner and outer stockings, without changing the functional or aesthetic characteristics of the upper; - opening said part of the mold once the injection of polyurethane has been completed; - removing the upper and the finished shoe upper from the mold and last; Constructed by The process produces a shoe that is a single, homogenous, compact body. A process characterized by

2. 10. The process of claim 1, wherein during weaving of the upper, additional thermosetting polymer yarns are added to the yarns of the weave and inserted into the inner and outer stockings in well-defined areas and at different densities to provide different properties of elasticity, reinforcement, and breathability, wherein the outer stocking contains a higher percentage of thermosetting polymer yarns than the inner stocking and has greater stiffness and resistance, and by heating the thermosetting polymer yarns to the melting temperature and moving the upper through the freezer, the thermosetting polymer yarns act as a binder between the inner and outer stockings and form the upper as one integral part.

3. 2. The process according to claim 1, characterized in that in placing the inner stocking on the last, the inner stocking is first inserted with its closed end overlapping the last, followed by the positioning of an insert (3) made of padding material to form a collar for strengthening the rear edge of the shoe, after which the outer stocking with its open end is pulled over the inner stocking to completely cover the last, and once the inner and outer stockings are joined, the outer stocking is retracted into the last, exposing the part corresponding to the insole (5) so that a reinforcing element (4) for the heel can be inserted.

4. 2. The process according to claim 1, characterized in that once the insole (5) is positioned during the formation of the upper, the outer stocking is then pulled and repositioned to close the upper, so that the edge of the open end of the outer stocking is underneath the upper in a position under the user's toes when the shoe is worn by the user.

5. 10. The process of claim 1, wherein in inserting the upper into the mold last, components to be overprinted are positioned on the upper and secured by adhesive.

6. 2. The process according to claim 1, characterized in that in injecting the polyurethane, the amount of polyurethane passes through the slots in the insole (5) to create a uniform adhesive bridge between the inner stocking of the upper and the sole, forming the fixing and gripping points as retention hooks (60).

7. 2. The process of claim 1, wherein the outer stocking forms the outside of the upper and is made by using natural, synthetic or blended yarns, and the inner stocking forms the inside of the upper and is made primarily of different types of yarns, including natural yarns such as wool.

8. 10. The process of claim 1, further comprising cutting away any molding that extends beyond the sole.

9. 10. The process of claim 1, wherein during construction / weaving of the double stocking, a series of stabilizing ribs are woven into the inner side of the double stocking for support and grip to the sides of the user's foot when the shoe is worn by the user.

10. 2. The process according to claim 1, characterized in that during the knitting of the double stocking, a process is carried out to create an X-shaped structure (8) that allows the upper to optimally constrain the user's foot when the shoe is worn by the user, the intersection of the structure being positioned over the toe of the foot and the ends of the X-shaped structure being located on the front and back sides of the user's foot when the shoe is worn by the user.

11. 2. A process according to claim 1, characterized in that during the injection of the polyurethane material, the insole (5) is able to receive said polyurethane so that a joint is created between the outer stocking part, the insole (5) and the sole through the fixing and gripping points formed as retaining hooks in the slots.

12. The shoe comprises an upper (2) formed by a pair of stockings including an inner stocking and an outer stocking turned inside out over the inner stocking, a heel reinforcing element for protecting and stiffening the heel (4) located between the inner and outer stockings, a padding element (3) of the collar of the shoe located between the inner and outer stockings and an insole (5) with an arch structure located between the inner and outer stockings, the insole being made of thermoformed felt and having a series of slots formed and positioned therebetween and on the insole and the sole of the shoe to create fixing and gripping points for the stocking, and an injection-molded polyurethane padding element (4). and a sole made of polyurethane, wherein a predetermined amount of the injected polyurethane passes only through the slots of the insole to form the sole and the fixing and gripping points between the insole and the inner and outer stockings, the contour of the insole is always parallel to the shape of the sole (7) and has side edges (51) with a predetermined portion extending above the sole, the upper having a distribution of thermoset yarns that gives the upper structural and functional characteristics, the upper being completely seamless, without any stitches, and the upper being made by reverse processing to obtain a three-dimensional weaving.

13. 13. The shoe according to claim 12, characterized in that the insole (5) has an arched area that follows the shape of the plantar arch and lateral edges (51) that make it possible to protect both the user's foot and the inner stocking from which the upper is made, the surface of the insole (5) being provided with a plurality of appropriately shaped and positioned slots with the precise function of generating points or segments according to dimensions that secure and grip the stockings together between them and the insole (5) and the sole (7), all in a single body.

14. 13. The shoe according to claim 12, characterized in that the insole, made of thermoformed felt, adapts to the shape of the user's foot, the side edges (51) receive the outer stocking, protecting the folded part of the pair of stockings and allowing a high level of comfort, protection and grip for the foot, the side edges (51) create ridges for the upper and are positioned to be continuous between the sole and the upper, thus creating a uniform and continuous contour, and the insole is a selective filter, a membrane, allowing it to obtain different properties according to holes, shape and size.

Images