Split-sole footwear

[0001] The application claims priority over US Patent Application No. 13 / 207,397 filed on August 10, 2011, entitled "Footwear with divided soles".

FIELD OF THE INVENTION [0002] The patent relates to footwear and more particularly to shoes with a divided sole.

BACKGROUND OF THE INVENTION [0003] Conventional footwear has structural limitations that force the wearer to make difficult choices between style and comfort. As a result, people experience significant pain in the foot, or choose to wear less-attractive shoes or styles that may be unsuitable for the occasion. To meet this problem, some women wear extra shoes in the car or in a large bag. The spare pair of conventional shoes is, however, not so ideal because of the size and volume restrictions during handling. There are lightweight rolled or folded shoes that offer increased portability. Products, however, do not contain support, durability, comfort or style beneficial in a non-folded shoe.

[0004] The foldable shoes according to the prior art also have outer soles that do not adequately protect the midsole and the top of the shoe, leading to premature wear of the shoe including tearing and damage to the shoe. The shoes are then typically fragile or do not provide, in other words, adequate support or protection of the foot. Many foldable shoes have, for example, a constant of total elasticity, which is between 0.14 kilo-force / inch and 0.34 kilo-force / inch, depending on the make and model. Shoes provide little resistance, protection and support or do not provide this and are therefore unsuitable to wear in repetitive or elongated applications, especially on the outside or in difficult terrain (eg dirty pavement, stones, etc.). The shoes are also not durable enough to withstand the standard life cycle of the shoe, even with moderate use. Therefore, although in some shoe designs attempts were made to bridge the gap between shoes on a daily basis and portable shoes, there is still no practical solution.

[0005] In shoe manufacturing processes according to the prior art, outer soles are sewn on the midsole. These outer soles are on the bottom of the shoe and protect the midsole and top from wear and tear and then provide support and stiffness for the entire shoe. After the outer soles are sewn, the midsole is sewn with the top and the liner, creating a single seam. This single seam traverses the circumference of the shoe and in particular marks the upper of the shoe from the midsole. Although processes are beneficial due to production efficiency, the disadvantage of this approach is when the properties of outer soles are considered. Sewing wheel sewing machine used to sew together the midsole, the upper and the insole collides with the outer soles previously stitched on the midsole. Because of this, a dilemma arises. The perfect outer sole patches are used to 1) protect the foot, 2) provide comfort and 3) ensure durability by protecting the seam securing the middle sole, the outer sole and the insole. Therefore, the ideal outer sole patches are thick and wide so that the perimeter of the outer soles is close to the seam. However, when the outsole becomes thicker and is brought closer to the seam that fixes the top, the inner sole and the insole, the seam becomes more difficult and finally impossible to sew. Therefore, shoes according to the prior art have been constructed with outer sole patches (i) thin and wide or (ii) narrow and thick. One shoe is disclosed in DE 20 2006 000230 U1, where the midsole is not separate from the upper sole, but is ultimately integrated with the insert element as a single shoe, unit element. This shoe must then be reinforced prior to use where the required strength is derived from a highly rigid sole component. The shoes according to the prior art are further limited by their ability to add cushion inserts beneath the insole, since the cushion inserts make the sutures even less feasible and force the stiffening and shading of outer soles more narrowly leading to greater instability and / or lower durability and protection of the foot . Therefore, in shoes according to the state of the art, the comfort and durability of the shoe has been changed to the stability of the shoe. That is why the dilemma becomes obvious. If the outer sole was made thin and narrow, the lack of support through the gap between the perimeter of the outer soles and the seam becomes noticeable and uncomfortable, and the seam, the upper and the midsole remain exposed to the ground. If the outer sole is thin and wide, the lack of support through the gap between the perimeter of the outer sole and the seam is not noticeable. In such cases the outer sole and seam are exposed to the ground, but the outer sole is worn faster and the shoe provides limited protection and comfort. With the above background of the invention, what is needed in the prior art are improved shoe designs and improved shoe production processes. and the shoe provides limited protection and comfort. With the above background of the invention, what is needed in the prior art are improved shoe designs and improved shoe production processes. and the shoe provides limited protection and comfort. With the above background of the invention, what is needed in the prior art are improved shoe designs and improved shoe production processes.

SUMMARY OF THE INVENTION [0006] The invention addresses previous and other disadvantages of the prior art by providing an improved foldable shoe. The disclosed shoes are a class of a women's shoe with a divided sole, which allows you to fold the shoe and put it in a bag with a drawstring. The split sole is described by the heel patch of the outsole and the finger patch of the outsole with the space between the patches. The disclosed shoes connect preferably the upper and the outer sole with a seam with an insert added separately. The insert is not a sewn-on seam at the same time, which connects the middle sole with the top. This allows (i) the circumference of the heel of the outer sole and the toe of the outer sole to be much closer to the seam connecting the central sole to the top, and (ii) the outer sole patches are thicker, thereby providing better seam protection,

[0007] In certain embodiments, the outsole patches are sewn. In certain embodiments, the outer sole patches are both sewn and glued. To enable patching, deep grooves are provided near the circumference of each outer sole patch. These deep grooves are used to make a seam between the patches and the middle sole. The tread pattern used to shape this seam is better protected by deep grooves, thereby improving the durability of the shoe and preventing wear on the seam.

[0008] The disclosed shoes have an improved elastic constant relative to known shoes in the female split soles class. In some embodiments, the elastic constant of the entire shoe is between 0.40 kilo-force / inch and 0.70 kilogram-force / inch or between 0.55 kilo-force / inch and 0.65 kilogram-force / inch. This improved constant elastic force provides more support and allows extended periods of wear.

[0009] In some embodiments, in addition to providing a foam fill that is often found in women's shoes, the disclosed shoes allow insertion of the cushion insert into the heel part of the shoes to provide additional support and comfort. This heel part also has a greater thickness at the heel end of the shoe than at the intermediate point between heel ends and toe shoes. The tapered thickness provides additional comfort, support and style.

[0010] While it is known to place the restriction puller on the edge of the top that receives the female foot, the shoes described provide a streamlined design by ending the limiting puller in the heel part of the shoe. There, instead of using a limiting puller, an inbuilt cushion (Achilles cushion) was provided to provide more comfort.

BRIEF DESCRIPTION OF THE FIGURES [0011]

Fig. 1 is a perspective view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 2 is a side view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 3 is a top view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 4 is a front view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 5 is a rear view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 6 is a cross-sectional view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig 6A is a sectional view taken in the region 6A-6A of Figure 6.

Fig 6B is a sectional view taken in the region 6B-6B in Fig. 6.

Fig. 7 is a perspective view of a shoe in accordance with a described embodiment showing a pin cushion on which the shoe is in a stretched state.

Fig. 8 is a perspective view of a partial section of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig. 9 is a bottom view of a shoe according to a described embodiment in which the shoe is in a stretched state.

Fig 9A is a perspective view of the insert taken along line 9A-9A of Figure 9.

Fig 9B is a cross-sectional view of Fig. 9B taken along line 9B9B in Fig. 9.

Fig. 10 is a compact box having a lid in which a pair of shoes as described herein can be stored in a folded condition.

Fig. 11 is a perspective view of a shoe in accordance with a described embodiment in which the shoe is in a folded state in which the shoe is bent about an axis such that the top portion comprising the finger recess is pressed into the heel recess.

Fig. 12 is a perspective view of a trapeze pan that can be used to store shoes according to the invention.

Fig. 13 is a perspective view of a shopping bag that can be used to store shoes and other items according to the invention.

[0012] Similar reference numerals refer to corresponding parts throughout the entire range of several views of the figures.

DETAILED DESCRIPTION [0013] Figs. 1 to 5 provide perspective views, from the side, from above, at the front and rear of the shoe according to the invention. In the perspective and side views of Figs. 1 and 2, and when it is worn, the shoe does not appear to be different from a conventional shoe with a rigid sole. However, the shoe provides design flexibility, the ability to fold and comfort without negative projection on the wearer's outfit. In some embodiments, the cushion insert absorbs impact on the foot from walking on hard surfaces. The elastic puller 60 circles the top of the top 2 to grip the foot and create a comfortable fit to the feet of different sizes and shapes. The elastic puller 60 is, however, designed so that it does not surround the entire foot, by staying briefly behind, where it would otherwise grip the uncomfortable region of the Achilles tendon. The Achilles cushion 56 is instead integrated in the upper tab, which would otherwise surround the elastic band 60 for greater comfort. In some embodiments, the Achilles heel portion of top 2 is further machined to reduce its depth. By cutting this part of the shoe, the seam has been reduced which would normally protrude and come in contact with the foot, resulting in greater comfort.

The elastic constraint 60 is attached to the opening of the top 2 so that when worn the opening of the top 2 will extend to the size of the foot. In some embodiments, the elastic waistband 60 is sewn and glued to the top 2 to securely attach the two materials. In some embodiments, the elastic pull 60 is sewn, but not glued to the top 2. By sewing on the elastic puller without gluing, the maximum amount by which the puller can be stretched is increased. This allows a more comfortable fit for more foot sizes. Due to the lack of gluing of the puller, the natural reflection coefficient of the limiting puller is further preserved, adding comfort and extending the lifetime of the puller.

[0015] With reference to Figure 6, the elastic insert 30 provides additional comfort without impairing the portability and can be attached or removed. The elastic insert 30 optionally provides a support for instep. The shoe then comprises a foam pad 44 that has been attached by gluing to the insert 30. In some embodiments, the elastic arch support provides additional comfort without compromising the portability. The elastic arch support does not limit the folding of the shoe and can be attached or removed. In some embodiments, the midsole 8 is reinforced by securing the elastic material on the inside of the midsole below the insert 30 (e.g., between the foam fill 44 of the midsole 8). The reinforcement of the midsole 8 thus has a number of advantages. The bending points of the footwear are first strengthened without compromising the portability. Secondly, the parts of the midsole 8 that are most likely to suffer from destructive friction by contact with the walking surface are reinforced to better withstand this stress. Third, the part of the midsole 8, which comes into contact with the edge of the finger patch of the outer sole, is made more tear resistant. In some embodiments, the reinforcement is instead of the foam padding 44. In some embodiments, the reinforcement is in addition to the foam padding 44. to better withstand this tension. Third, the part of the midsole 8, which comes into contact with the edge of the finger patch of the outer sole, is made more tear resistant. In some embodiments, the reinforcement is instead of the foam padding 44. In some embodiments, the reinforcement is in addition to the foam padding 44. to better withstand this tension. Third, the part of the midsole 8, which comes into contact with the edge of the finger patch of the outer sole, is made more tear resistant. In some embodiments, the reinforcement is instead of the foam padding 44. In some embodiments, the reinforcement is in addition to the foam padding 44.

[0016] In some embodiments, the rigid insert is inserted between the foam padding 44 and the soleplate 8. This rigid liner extends over the width of the midsole 8 and from the toes of the midsole 8, not further to the midpoint 32 in which the footwear is folded. . By inserting the rigid insert in this way, more space is maintained when it is worn between fragile shoe parts (e.g., top 2) and the walking surface. By increasing this space, durability was increased.

[0017] Still with reference to Fig. 6, the shoe comprises three uni- formly shaped elements: a soles 8, a sole heel 24 and a finger patch of the outer sole 26. In some embodiments, the midsole 8 is made of an elastic but permanent material such as high quality leather. In some embodiments, the outer sole heel 24 and the toe flap 26 are constructed of non-slip material for all weathers. In typical application examples, the outer sole heel 24 and the toe flap 26 are individually sewn into the midsole 8. Materials required for the necessary durability and safety of the all-day shoe are too stiff to provide the necessary flexibility for folding. Therefore, in preferred embodiments, the outer sole heel 24 and the finger patch of the outer sole 26 are separate and are individually sewn to the midsole 8 with a gap 32 between them to fold the shoe. The size and shape of the heel pad of the outsole 24 and the toe flap 26 are designed to optimally balance durability, comfort and practicality, with compact size and minimum weight. The heel patch shape of the outsole 24 and the finger patch of the outsole 26 maximizes foot protection in a space-efficient manner. In some embodiments, the contours of the heel patch of the outer sole 24 and the finger patch of the outer sole 26 are diagonal, to ensure an attractive extra height when worn and to increase the clearance between the midsole 8 and the ground when worn. In embodiments, the slope is designed such that when two shoes are stacked, the large part encounters a small one to significantly reduce the total thickness of the compressed steam for increased transferability.

[0018] The top 2 of the shoe is made of a high quality, flexible but durable material to withstand repeated folding in the middle of the shoe and long storage periods in the stowed position. The materials reduce or eliminate cracking at the joint surface and damage by contact with surfaces. Top 2 is constructed and sewn in a way that wraps the top and sides of the foot. The specific ratio of the top to the outer sole also allows the soft top 2 to form on wide and narrow feet, forming itself in the unique shape of each foot of the wearer and adding the advantages of comfort and style. The proportion also reduces the volume of shoes in the folded condition for storage and transferability. The rounded finger cavity 6 and the flexible design of the wrapped top increases commercial appeal by reducing or eliminating the need for expensive stocks of half sizes or widths, while maintaining a durable and comfortable design. The design allows considerable flexibility for the fashionable elements on the surface, such as different colors, textures and embellishments. The shoe, when worn, does not seem to be different from conventional shoes with a solid sole, adding style and the ability to wear with a more formal outfit.

[0019] With reference to Figure 13, a lightweight, durable, reusable, self-contained foldable shopping bag with handles that can be folded and compressed and then stored in a compacting pouch (Figure 12) adds utility to the folding shoe system. A pannier in typical embodiments is made of a stretchable material in two directions and is adapted to self-assemble into a shape that minimizes the volume (e.g., approximately a spherical shape). In some embodiments, sewing the pannier allows this stretching (e.g., using a zigzag seam). In some embodiments, the stretcher thread material is used in the seam.

[0020] The shopping bag may advantageously be folded into the pouch of the shopping bag. In some embodiments, this pocket is inside the shopping bag when the shopping bag is in a non-folded condition. In some embodiments, the pocket is made of an elastic material such that the shopping bag is compressed when in a folded condition. When it is favorable, the bag expands to wear a different pair of shoes, with sufficient volume for additional items. The pocket in some embodiments is made of a stretchable material in two directions and is adapted to self-assemble into a shape that minimizes volume (e.g., approximately a spherical shape).

[0021] With reference to fig. 12, a pannier made of a stretchable nylon, polyester or similar adds functionality through the safe and clean storage of folded footwear and related items. The bag compresses footwear in a folded configuration to the minimum size when it is stored or transported. The rounded edge on the bottom of the pannier then reduces the volume and increases the compression. The pannier is a size slightly smaller than the footwear to minimize the volume. The straps around the opening of the pannier then support the compression and seal the dirty shoes against the contents of the bag or pocket. A pocket located on one side of the pannier allows compressed storage of the shopping bag and / or other items.

[0022] The disclosed design of a foldable shoe allows shoes to be worn in the normal manner in accordance with conventional rigid sole products and is suitable for various surfaces, weather, fashions, etc. When storage or transferability is preferred, the shoes are folded by hand approximately their midpoint, thus reducing their length to half. In their complex configuration, the shoes can be piled up and placed in a compacting pannier for maximum compression and portability. Once it is hidden in the satchel, the pair requires only a wallet space and can be carried in a purse or pocket.

[0023] When a review of a shoe according to the invention has already been described, certain features and different embodiments of the disclosed shoes will now be described. With reference to Fig. 7, the shoe is shown as described. The shoe contains a top 2. The top 2 forms the inner part 62 that receives the woman's foot. The inner part comprises a finger recess 4 and a heel recess 6.

[0024] With reference to Figure 9, the shoe then comprises a midsole 8. The midsole 8 has (i) the fingertip 10, (ii) the heel end 12, (iii) the inner side 14 and (iv) the outer side 16. The circumference the midsole 8 is sewn to the top 2. Therefore, the suturing of the midsole 8 to the top 2 forms a bottom for the inner part 62, which is delimited by the first suture 22. The heel of the outer sole 24 is sewn over the heel portion of the first midsole 8 face. outer 26 is sewn over the toe portion of the first face of the midsole 8.

[0025] In typical embodiments, the outer sole heel 24 and the finger patch of the outer sole 26 are sewn onto the midsole before sewing the midsole 8 on top 2.

With reference to Figure 6, there is a gap 32 between the (i) heel of the outsole 24 sewn on the heel portion of the first face of the midsole 8 and (ii) the finger patch of the outsole 26 sewn on the toe portion of the first face of the midsole 8. The distance 32 extends from the inner side 14 to the outer side 16 of the midsole 8 and takes the intermediate place between the finger end 10 and the heel end 12 of the midsole 8, thereby allowing the entire shoe to be folded around the axis 34 at a distance 32 running between the inner side 14 a the outer side 16. In some embodiments, the spacing is between 4/8 inch and 6/8 inch. In some embodiments, the gap is about 5/8 inches. Performing these measurements,

[0027] Further with reference to Fig. 6, the insert 30 is attached by gluing to the bottom of the inner part.

[0028] The shoe is configured to fold between (i) a stretched condition, the outer sole heel 24 and the outer patch of the outer sole 26 being coplanar or approximately coplanar (Figures 1 to 9) and (ii) a folded condition in which the shoe it is bent about the axis 34 so that the part of the top 2 including the finger recess 4 is hidden in the heel recess 6 (figure 11).

[0029] In some embodiments, the insert 30 is not sewn to the top 2. Therefore, in the embodiments, the first seam 22, shown in Figure 9, connects only the top 2 and the inner sole 8, not the insert 30. With reference to fig 9, this provides the main advantage because it allows the circumference of the heel and finger toe out of the heel 24, 26 to the first seam 22 than in the cases where the first seam binds to the top 2, the inner soles 8 and the insert 30 and allows for thicker heel and toe pads of the outsole and more specifically (thicker and stiffer) cushion in the insole. This distance is shown as distance 104 in Fig. 9A. In embodiments where the first seam 22 only connects the top 2 and the inner sole 8, the edge of the rear corner 64 of the finger patch of the outer sole 26 is suitably within 1/4 inch of the first suture portion 22. This proximality of the suture 22, together with the thickness of the outer soles, preferably serves to protect the first suture 22 and the midsole 8 from 32, before wear and tear. In some embodiments, the edge of the front corner 66 of the finger patch of the outsole 26 is within 1/4 inch of the portion of the first seam 22.

[0030] In typical embodiments, the distance 104 between the edge of the finger patch of the outer sole 26 and the first suture 22 is the same. In some embodiments, where the distance 104 is the same, (i) the edge of the rear corner 64 and (ii) the edge of the front corner 66 of the finger patch of the outsole 26 are respectively within 4/8 inch, 3/8 inch or 2/8 inch. corresponding to the part of the first seam 22.

[0031] In some embodiments, the edge of the rear corner 68 of the heel of the outer sole 24 is within 3/16 in. Of the first suture 22. In some embodiments, the edge of the forward corner 70 of the heel of the outer sole 24 is between

2/4 inch and 3/4 inch portions of the first seam 22. In some embodiments, the distance 104 between the heel edge of the outer sole 24 and the first suture 22 is the same. In some embodiments in which the distance 104 is the same, (i) the edge of the rear corner 68 and (ii) the edge of the front corner 70 of the heel brace of the outer sole 24 are respectively within 4/8 inch, 3/8 inch or 2/8 inch. corresponding to the part of the first seam 22. In some embodiments, the distance 104 between the heel edge of the outer sole 24 and the first suture 22 is not uniform. In some embodiments in which the distance 104 is not uniform, the edge of the rear corner 68 of the heel of the outer sole 26 is within 3/8 inch or 2/8 inch of the corresponding portion of the first seam 22.

The approximate distances 104, in combination with the thickness of the rubber and the stiffness of the cushion enabled by the mounting method described, allow the midsole 8 and the top 2 to be protected, thereby ensuring durability of the shoe while allowing a foldable design that remains flexible and comfortable.

[0033] With reference to Fig. 9A, the unique and improved shoe feature is the value of the durability coefficient. According to this application, the term "durability ratio" is defined as the thickness of the outer sole patch divided by the distance 104 between the outer shoe patch edge and the first suture 22. In some embodiments, the distance 104 is 4 mm and the thickness 106 is also 4 mm and thus the durability coefficient is one. In some embodiments, the distance 104 is 4 mm and the thickness 106 is 5 mm and thereby the durability ratio is 1.25. In some embodiments, the durability ratio is between 0.8 and 1.5. In some embodiments, the durability ratio is between 0.9 and 1.4. In some embodiments, the durability ratio is between 1.0 and 1.3.

[0034] In some embodiments, the outer sole heel 24 and the toe flap 26 are preferably at least 3/32 inches thick each. In some embodiments, the outer sole heel 24 and the toe flap 26 are preferably at least 4/32 inches thick each. In some embodiments, the outer sole heel 24 and the finger patch of the outer sole 26 are at least 5/32 inches thick each. In some embodiments, the outer sole heel 24 and the outer patch 26 of the outer sole 26 are at least 6/32 inches thick each. In some embodiments, the outer sole heel 24 and the outer patch 26 of the outer sole 26 are at least 7/32 inches thick each. In some embodiments, the outer sole heel 24 and the toe flap 26 are at least 8/32 inches thick each. Thickness increases the elastic constant of the soles, leading to greater support for the foot and increased durability of the shoe. With reference to Fig. 1, because of the thickness of the outer sole patches and their proximity to the edge, it is possible to view the outer sole patch at least at an angle of 45 degrees 100 from level 102 when the shoe is worn on the female foot when the woman is standing vertically relative to the horizontal. In some embodiments, it is possible to view the side of the outer sole with at least an angle of 50 degrees, at least an angle of 55 degrees, or at least an angle of 60 degrees 100 from level 102 when the shoe is worn on the female foot when the woman is upright.

[0035] In some embodiments, the outer sole heel 24 and the finger patch of the outer sole 26 are made of an elastomer. Exemplary elastomers that may be used include, but are not limited to, e.g., natural rubber, vulcanized natural rubber, butadiene-styrene copolymer, such as GR-S, neoprene, nitrile, butyl, polysulfide gums, ethylene-propylene rubbers polyurethane gums and silicone gums, such as those described in Marks' Standard Handbook for Mechanical Engineers, 1987, Avallone and Baumeister, eds., McGraw-Hill, New York, pp. 6-161 to 1-163, which are hereby incorporated herein as a reference. In some embodiments, the midsole 8 is made of leather.

[0036] With reference to Figures 6, 6A and 6B, in some embodiments the shoe is characterized by a central sole 8. The outer sole heel 24 and the outer patch of the outsole 26 are sewn onto the first forehead of the midsole 8. The midsole 8 comprises a second midsole a forehead having a heel portion 68 and a finger portion 70. In some embodiments, the pin stuff 46 is glued to the heel portion 68 of the second face of the midsole 8. The insert 46 absorbs the shock on the foot while walking on hard surfaces. The insert 46 forms on the foot over time. The foam padding 44 is glued onto (i) the pin insertion 46 and (ii) the finger portion 70 of the second face of the midsole 8. The pad 30 is then secured by the foam-filled adhesive 44. which is the closest to the toe portion 70 of the midsole, is thinner than the portion of the cushion 46 which is farthest from the toe portion 70 of the midsole 8. In some embodiments the maximum thickness of the cushion 46 is 3 millimeters or more, 4 millimeters or more, 5 millimeters or more, 6 millimeters or more, 7 millimeters or more or 8 millimeters or more. This advantageously serves to improve the support provided by the shoe, in particular in the heel, provides for advantageous lifting and increases stiffness and thus durability. 6 millimeters or more, 7 millimeters or more or 8 millimeters or more. This advantageously serves to improve the support provided by the shoe, in particular in the heel, provides for advantageous lifting and increases stiffness and thus durability. 6 millimeters or more, 7 millimeters or more or 8 millimeters or more. This advantageously serves to improve the support provided by the shoe, in particular in the heel, provides for advantageous lifting and increases stiffness and thus durability.

[0037] In addition to providing a stepped thickness to increase the foot support, the pin insert 46 is made of a rigid material such as rigid ethylene with vinyl acetate or similar cushion material. In some embodiments, the pin cushion 46 has a Shore A hardness between 45 and 70 or between 60 and 70. In some embodiments, the pin cushion 46 has a density between

0.30 g / cm³ a 0.5 g / cm³, between 0.40 g / cm³ a 0.5 g / cm³, between 0.45 g / cm³ a 0.5 g / cm³ or between 0.50 g / cm³ a 0.70 g / cm³.

[0038] The thickness of the heel of the outer sole 24 and the finger patch of the outer sole 26 together with the materials used to make these patches, the proximity of these patches to the seam 22 and the possibility of adding a cushion insert contribute to a significantly increased elastic constant over the known foldable shoes. In some embodiments, the total shoe elastic constant taken along the heel portion 68 of the shoe (e.g., in the heel area of ​​the outsole 24) is between 0.40 kilo-force / inch and 0.70 kilogram-inch / inch. In some embodiments, the total elastic constant made along the heel portion 68 of the shoe is between 0.45 kilo-force / inch and 0.65 kilogram-force / inch or between 0.55 kilo-force / inch and 0.65 kilogram- force / inch. In some embodiments, the total elastic constant made along the heel part 68 of the shoe is about 0.6 kilo-force / inch. With reference to Fig. 6, to measure the elastic constant, parts 68 and 70 are measured separately. For each area, with the shoe held in an upright position, one end (e.g., one end of the parts 68 or 70 along the long track and with the shoe facing up as if it were worn) is anchored and then the other end of the shoe measurement part 68 or 70 is pushed down by a certain distance (e.g., 1 inch), and the force exerted by the pushed down end is then measured.

[0039] In some embodiments, the total shoe elastic constant taken along the finger portion 70 of the shoe (e.g., in the region of the finger patch on the outsole 26) is between 0.40 kilo-force / inch and 0.70 kilogram-force / inch. In some embodiments, the total elastic constant made along the toe portion 70 is between 0.45 kilo-force / inch and 0.65 kilogram-force / inch or between 0.55 kilo-force / inch and 0.65 kilogram- force / inch. In some embodiments, the total elastic constant made along the shoe part 68 is about 0.6 kg / force / inch.

[0040] Another advantageous feature of the shoes according to certain embodiments of the invention are the deep grooves in the heel of the outsole 24 and the toes of the outsole 26, which allow the patches to be sewn to the midsole 8 while protecting and sewing on it. The deep grooves 48 are made possible by an advantageous design in which thick outer sole patches are made that are simultaneously close to the first seam 22 that secures the top 2 to the midsole 8. The deep grooves 48 protect the stitching that fixes the outer sole to the midsole 9 before contact with the ground, which could cause the sewing to wear off and cause the outer soles to loosen. These advantageous features are related. By simply sewing the top 2 to the midsole 8 to create the first seam, instead of subsequently sewing the insole 30 to the midsole 8, it is possible to minimize the distance 104 and to increase the thickness of the outer soles 24/26, still allowing the midsole 8 to be sewn to the top 2 using conventional processes such as a sewing machine. Because distance 104 is minimized, it is possible to make thicker outer sole patches 24/26 (e.g., increase the distance 106) without destabilizing the foot support. Because the outer sole patches 24/26 are thicker, it is possible to make a deeper first groove 48, thereby better protecting the stitching within the groove. Because the outsole patches are thicker, the shoe is also reliable and allows for longer periods of time and a wider spectrum of terrain (eg asphalt, concrete, dirt roads, etc.). ) With reference to Fig. 9, one preferred embodiment has a first groove 48 having a depth of at least 3/64 inches, which is formed close to the heel circumference of the outer sole 24. The sole heel of the outer sole 24 is sewn onto the heel portion of the first midsole 8 with the first groove that occupies the first groove 48. A second groove 50 having a depth of at least 3/64 inches is then formed close to the periphery of the outer patch of the outer sole 26. The finger patch of the outsole 26 is sewn on the toe portion of the first face of the midsole with the second weft, which occupies the second groove 50. In some examples, the first groove 48 has about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. one preferred embodiment has a first groove 48 having a depth of at least 3/64 inches, which is formed close to the heel circumference of the outer sole 24. The outer sole heel 24 is sewn onto the heel portion of the first face of the midsole 8 with the first weft that occupies the first groove 48. A second groove 50 having a depth of at least 3/64 inch is then formed close to the periphery of the outer patch of the outer sole 26. The finger patch of the outsole 26 is sewn over the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some for examples, the first groove 48 is about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. one preferred embodiment has a first groove 48 having a depth of at least 3/64 inches, which is formed close to the heel circumference of the outer sole 24. The outer sole heel 24 is sewn onto the heel portion of the first face of the midsole 8 with the first weft that occupies the first groove 48. A second groove 50 having a depth of at least 3/64 inch is then formed close to the periphery of the outer patch of the outer sole 26. The finger patch of the outsole 26 is sewn over the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some for examples, the first groove 48 is about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. The heel of the outsole 24 is sewn over the heel portion of the first face of the midsole 8 with the first weft that occupies the first groove 48. The second groove 50 at least 3/64 inches is then formed close to the periphery of the outer finger patch 26. Toe outer sole 26 is sewn onto the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some instances, the first groove 48 has about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. The heel of the outsole 24 is sewn over the heel portion of the first face of the midsole 8 with the first weft that occupies the first groove 48. The second groove 50 at least 3/64 inches is then formed close to the periphery of the outer finger patch 26. Toe outer sole 26 is sewn onto the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some instances, the first groove 48 has about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. The finger patch of the outsole 26 is sewn onto the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some instances, the first groove 48 is about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches. The finger patch of the outsole 26 is sewn onto the toe portion of the first face of the midsole 8 with the second weft that occupies the second groove 50. In some instances, the first groove 48 is about 3/32 inches. In some examples, the second groove 50 is about 3/32 inches.

[0041] Referring to Fig. 5, the top 2 is formed as a single member having a first end and a second end, where the first end and the second end are joined by the second seam 52 in the heel recess. In some embodiments, the top 2 is formed of two or more elements.

[0042] With reference to Figures 3 and 9, in typical embodiments, the top 2 is formed as a single element having (i) a first end (80), (ii) a second end (82), (iii) a first edge (84) (shown in Fig. 9) and (iv) a second edge (86). In some embodiments, the top 2 is formed from two or more pieces sewn together. With reference to Fig. 3, in typical embodiments, the top 2 is a single element having the ends 110A and 110B. The top 2 can of course be formed by any number of pieces sewn together into one element having the ends 110A and 110B. Regardless of whether the top comes from one or more elements, the ends 110A (first end) and 110B (the other end) are joined by the second seam 52 in the heel 6 to complete the top 2. With reference to Fig 9 the first edge 84 of the top 2 is sewn to the circumference of the midsole 8, thereby forming a second seam 22 and a bottom for the inner part of the shoe. With reference to Figure 3, the first part of the second edge 86 is characterized by a limiting ribbing 60, where the second edge portion does not extend to the heel depression 6. In some embodiments, the second portion of the second edge 86 is characterized by an Achilles cushion 56 that provides a top border for 6. Next, with reference to Fig. 5, in some embodiments, the half-moon element 58 covers the lower part of the second seam 52, wherein the waist portion 54 covers the upper part of the second seam 52.

[0043] With reference to Fig. 11, in some embodiments, the shoe is in a folded condition. In this folded state, the shoes can be inserted into a compacting bag made of a stretchable nylon or similar material (Figure 12) having a sheath. This ensures that the shoes are transported in a clean and compact condition and are compressed to the minimum size. In some embodiments, the pouch has a pocket for holding the shopping bag, where the shopping bag is configured to accommodate a pair of women's shoes or other objects and personal belongings. This makes it possible to wear shoes according to the invention in a pannier, while on the road and to switch to wearing shoes according to the invention by storing unwanted previously worn shoes into a shopping bag after it has been removed from the pannier pouch and unfolded from the folded condition.

[0044] The shoes of the invention are preferably pressed into a folded state so that they can be stored in a compact box having a lid. The compact box is shown in Fig. 10.

[0045] In some embodiments, the edges of the outer sole patches are beveled in two directions. First, the edge of the outer sole patch is bevelled at a large inclination for durability and for aesthetic reasons. By maintaining a steep slant at the outer edge of the outer soles patches, more space was maintained between the walking surface and the soft elements of the footwear, thereby increasing durability. Secondly, in some embodiments, the inner edge of one or more outer sole patches is bevelled. By cutting the diagonal patches in this way, the pressure between the edge of the outer soles patch and the softer central sole is reduced. This oblique bevel blunts and softens the edge of the outer sole patch, which is not attached to the midsole. By softening this edge, the durability and life expectancy of the footwear are increased.

[0046] As described above, the prior art split sole has certain limitations. In some embodiments, the disadvantages of the prior art are overcome by providing shoes that provide a maximum outer sole ratio (OR) where the OR is defined by:

DxTxW where:

D = average depth of the second groove 50,

T = average thickness of the outer finger patch 26,

W = maximum width of the finger patch on outer soles 26 and

M = the width of the midsole 8 at the point of the maximum width of the toe lattice 26, where W is smaller than M, and D, T, W and M are all given in the same unit of measure (e.g., in millimeters).

In some embodiments, the shoes of the invention have an outer sole ratio OR, respectively. When this coefficient is maximized, the finger patch of the outer sole 26 is thick, the second groove 50 in which the finger patch of the outer sole 26 has been sewn, the deep outer toe of the outer sole 26 being close to the edge of the footwear. In some embodiments, the acceptable outer sole ratio requires a finger patch on the outsole 26 that is as narrow as possible, still allowing a wide range of foot width to be accommodated. The narrower the toe arch 26, the more compact and portable the footwear is and the better it will fit on the narrow foot.

[0047] As the width of the finger patch of the outer sole 26 is then tapered, the depth of the second groove 50 for its stitching becomes more important because this seam area will receive greater compression from the walking surface. Therefore, a deep groove 50 is necessary to protect the seam stitching. An equally increasing importance as the tapered width of the outer sole 26 is to cover the midsole 8 through the finger patch of the outer sole 26 and its proximity to the top edge 2. Advantages of the finger patch 26, which is closer to the edge of the footwear, are shown above. According to the description, it should be assumed that the same principles apply to the heel pad of the outer sole 26 and the first groove 48.

[0048] Table 1 below shows preferred values ​​for the average depth of the second groove 50 (D), the average thickness of the finger patch 26 (T), the maximum width of the finger patch 26 (W) and the width of the midsole 8 at its maximum point the width of the toe flap 26 (M) according to an embodiment of the invention.

Table 1, preferred measurements for shoes according to one embodiment of the invention .......

<td>The size of the women's shoe (American)</td><td>5</td><td>6</td><td>7</td><td>8</td><td>9</td><td>10</td><td>11</td><td>12</td>

<td>Depth (D) of the second groove 50 in mm</td><td>2.5</td><td>2.5</td><td>2.5</td><td>2.5</td><td>2.5</td><td>2.5</td><td>2.5</td><td>2.5</td>

<td>Thickness (T) of the finger patch of the outsole 26 in mm</td><td>4</td><td>4</td><td>4</td><td>4</td><td>4</td><td>4</td><td>4</td><td>4</td>

<td>Maximum width (W) of the finger patch of the outer sole 26 in mm</td><td>66</td><td>69</td><td>72</td><td>75</td><td>78</td><td>81</td><td>84</td><td>86</td>

<td>The width (M) of the midsole at the measurement point of the toe mating shoe 26 in mm</td><td>74</td><td>77</td><td>80</td><td>83</td><td>86</td><td>89</td><td>92</td><td>94</td>

<td>D x T x W</td><td>660</td><td>690</td><td>720</td><td>750</td><td>780</td><td>810</td><td>840</td><td>860</td>

<td>DXTXW M</td><td>8.92</td><td>8.96</td><td>9.00</td><td>9.04</td><td>9.07</td><td>9.10</td><td>9.13</td><td>9.15</td>

[0049] In some embodiments, the shoes of the invention have an outsole factor of 7.0 or greater. In some embodiments, the shoes of the invention have an outsole factor of 7.2 or greater. In some embodiments, the shoes of the invention have an outsole factor of 7.4 or greater. In some embodiments, the shoes of the invention have an outsole factor of 7.6 or greater. In some embodiments, the shoes of the invention have an outsole rating of 7.8 or greater. In some embodiments, the shoes of the invention have an outsole rating of 8.0 or greater. In some embodiments, the shoes of the invention have an outsole factor of 8.2 or greater. In some embodiments, the shoes of the invention have an outsole rating of 8.4 or greater. In some embodiments, the shoes of the invention have an outsole rating of 8.6 or greater. By providing an outsole ratio with this degree of size, a number of benefits arise from the increase in the feasibility of footwear with a split sole.

[0050] Table 2 and 3 below show preferred values ​​for the average depth of the second groove 50 (D), the average thickness of the finger patch 26 (T), the maximum width of the finger patch 26 (W) and the width of the midsole 8 at the point its maximum width of the finger patch on the outer sole 26 (M) according to embodiments of the invention.

Table 2, preferred measurements for shoes according to one embodiment of the invention.

<td>The size of the women's shoe (American)</td><td>5</td><td>6</td><td>7</td><td>8</td><td>9</td><td>10</td><td>11</td><td>12</td>

<td>Depth (D) of the second groove 50 in mm</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td><td>2.5 ± 5</td>

<td>Thickness (T) of the finger patch of the outsole 26 in mm</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td><td>4 ± 5</td>

<td>Maximum width (W) of the finger patch of the outer sole 26 in mm</td><td>66 ± 2</td><td>69 ± 2</td><td>72 ± 2</td><td>75 ± 2</td><td>78 ± 2</td><td>81 ± 2</td><td>84 ± 2</td><td>86 ± 2</td>

<td>The width (M) of the midsole at the measurement point of the toe mating shoe 26 in mm</td><td>74 ± 2</td><td>77 ± 2</td><td>80 ± 2</td><td>83 ± 2</td><td>86 ± 2</td><td>89 ± 2</td><td>92 ± 2</td><td>94 ± 2</td>

Table 3, preferred measurements for shoes according to one embodiment of the invention

<td>The size of the women's shoe (American)</td><td>5</td><td>6</td><td>7</td><td>8</td><td>9</td><td>10</td><td>11</td><td>12</td>

<td>Depth (D) of the second groove 50 in mm</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td><td>2.5 ± 1</td>

<td>Thickness (T) of the finger patch of the outsole 26 in mm</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td><td>4 ± 1</td>

<td>Maximum width (W) of the finger patch of the outer sole 26 in mm</td><td>66 ± 4</td><td>69 ± 4</td><td>72 ± 4</td><td>75 ± 4</td><td>78 ± 4</td><td>81 ± 4</td><td>84 ± 4</td><td>86 ± 4</td>

<td>The width (M) of the midsole at the measurement point of the toe mating shoe 26 in mm</td><td>74 ± 4</td><td>77 ± 4</td><td>80 ± 4</td><td>83 ± 4</td><td>86 ± 4</td><td>89 ± 4</td><td>92 ± 4</td><td>94 ± 4</td>

[0051] In some embodiments, a shoe is provided that provides a maximum outer sole ratio (OR) where OR is defined as:

<img file="PL2741629T3_D0001.tif" />

where:

D '= is the average depth of the second groove 50 and is a value between 2.0 mm and 3.0 mm,

T '= is the average thickness of the finger patch on the outer sole 26 and is at least 3.0 mm,

W '= maximum width of the finger patch on the outer sole 26 and is a value between 60 mm and 89 mm, a

M '= the width of the midsole 8 at the point of the maximum width of the finger patch of the outer sole 26 and is the value greater than W', which is between 70 mm and 93 mm, and

OR 'is a value between 7.0 and 8.6.

In some embodiments, T 'is at least 4.0 mm, at least 5.0 mm, at least 6.0 mm, at least 7.0 mm, at least 8.0 mm, or at least 9.0 mm.

[0052] The first benefit of the shoes guaranteeing the OR measure is comfort. Thicker outer sole patches allow a larger cushion between the foot and the walking surface and minimize the impact of hard objects. The wide outer sole patch, which is closer to the edge of the shoe, covers more of the bottom of the foot, preventing an uncomfortable feeling from applying to the edge of the outsole or foot, or worse, hanging over the edge of the rubber.

[0053] A second benefit is improved foot protection. Thicker outer soles provide a larger barrier and thus protect the foot against hard and sharp objects. Then wider outer soles provide more protection and cover the foot.

[0054] A third advantage is improved durability. The outer soles close to the edge of the shoe protect the seam stitching, the outer sole (24, 26), the midsole (8) and other delicate elements of the shoe. Thicker outer soles (24, 26) provide more outer soles to wear out before the delicate parts of the shoe (e.g., midsole 8) are worn by contact with the ground. The deeper groove (e.g., first groove 48 and second groove 50) better protects the outer outer sole, therefore it does not wear out too quickly.

[0055] A further advantage is that it enables a more attractive style: a narrower shoe bends to accommodate a wider foot when necessary. This is ensured by a deep groove (e.g., a first groove 48 and a second groove 50) that protects the suture from increased contact with the groove and thereby suturing it with the ground in the narrower shoe. This is then provided by the thick outer sole patch (e.g., the outer sole heel 24 and the outer sole patch 26) which is close to the edge which is becoming more and more important in narrow shoes because some of the feet are wider than the outer sole. That is why the thickness of the outsole prevents the seam / sole midsole 8 / top 2 from pushing downwards to the ground.

[0056] A fifth advantage is that the shoe is more portable and compact because the non-folded heel area of ​​the outer sole 24 and the outer sole of the outer sole are minimized.

PREPARATED EMBODIMENTS [0057] Next, there are non-limiting embodiments of the invention.

[0058] Embodiment A. Boot comprising:

upper, upper shaping the inner part for receiving the foot of the person, the inner part comprising the finger recess and the heel recess;

a midsole, a midsole having (i) a fingertip, (ii) a heel end, (iii) an inner side and (iv) an outer side, the midsole circumference sutured to the top thereby forming a bottom for an inner portion that is limited through the first seam;

heel patch of the outsole sewn onto the heel part of the first forehead of the midsole; first finger patch sewn on the first forehead of the midsole; an insert which was attached to the bottom of the inner part by glue;

there is a gap between the heel calipers of the outsole sewn on the heel portion of the first face of the midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inside to the outside and taking the intermediate seat between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside;

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the finger recess is hidden in the heel recess and wherein (i) the insole is not sutured to the top or midsole and (ii) the outer sole heel and the outer sole of the outer sole are made of an elastomer.

[0059] Embodiment B. A shoe comprising:

upper, upper shaping the inner part for receiving the foot of the person, the inner part comprising the finger recess and the heel recess;

a midsole, a midsole having (i) a fingertip, (ii) a heel end, (iii) an inner side and (iv) an outer side, the midsole circumference sutured to the top thereby forming a bottom for an inner portion that is limited through the first seam;

heel patch of the outsole sewn onto the heel part of the first forehead of the midsole; a finger patch of the outsole sewn onto the toe portion of the first face of the midsole; an insert which was attached to the bottom of the inner part by glue;

there is a gap between the heel calipers of the outsole sewn on the heel portion of the first face of the midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inside to the outside and taking the intermediate seat between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside;

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the finger recess is hidden in the heel recess and wherein (i) the insole is not sewn to the top and (ii) the area of ​​the shoe defined by the outer sole heel patch and including the corresponding midsole part and the insert has a spring constant between 0.40 kg / force / cal and 0.70 kilo-force / inch.

[0060] Embodiment C. A shoe comprising:

upper, upper shaping the inner part for receiving the foot of the person, the inner part comprising the finger recess and the heel recess;

a midsole, a midsole having (i) a fingertip, (ii) a heel end, (iii) an inner side and (iv) an outer side, the midsole circumference sutured to the top thereby forming a bottom for an inner portion that is limited through the first seam;

heel patch of the outsole sewn onto the heel part of the first forehead of the midsole; a finger patch of the outsole sewn onto the toe portion of the first face of the midsole; an insert which was attached to the bottom of the inner part by glue;

there is a gap between the heel calipers of the outsole sewn on the heel portion of the first face of the midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inside to the outside and taking the intermediate seat between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside;

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the finger recess is hidden in the heel recess and wherein (i) the insert is not sewn to the top and (ii) the rear corner of the finger patch of the outer sole is within 1/4 inch of the part of the first seam.

[0061] Embodiment D. A shoe comprising:

upper, upper shaping the inner part for receiving the foot of the person, the inner part comprising the finger recess and the heel recess;

a midsole, a midsole having (i) a fingertip, (ii) a heel end, (iii) an inner side and (iv) an outer side, the midsole circumference sutured to the top thereby forming a bottom for an inner portion that is limited through the first seam;

heel patch of the outsole sewn onto the heel part of the first forehead of the midsole; a finger patch of the outsole sewn onto the toe portion of the first face of the midsole; an insert which was attached to the bottom of the inner part by glue;

there is a gap between the heel calipers of the outsole sewn on the heel portion of the first face of the midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inside to the outside and taking the intermediate seat between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside;

and (iii) A second groove having a depth of at least 3/64 inches is formed in the vicinity of the periphery of the outer sole of the finger patch and the finger patch of the outsole is sewn on the toe portion of the first midsole with the second weft that occupies the second groove; and [0062] Embodiment E. But containing:

upper, upper shaping the inner part for receiving the foot of the person, the inner part comprising the finger recess and the heel recess;

a midsole, a midsole having (i) a fingertip, (ii) a heel end, (iii) an inner side and (iv) an outer side, the midsole circumference sutured to the top thereby forming a bottom for an inner portion that is limited through the first seam;

heel patch of the outsole sewn onto the heel part of the first forehead of the midsole; a finger patch of the outsole sewn onto the toe portion of the first face of the midsole; an insert which was attached to the bottom of the inner part by glue;

there is a gap between the heel calipers of the outsole sewn on the heel portion of the first face of the midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inside to the outside and taking the intermediate seat between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside;

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the toe is hidden in the heel recess and wherein (i) the area of ​​the shoe defined by the outer sole heel patch and including the corresponding midsole part and the insert has a constant elasticity between 0.45 kilo-force / inch and 0.55 kilo-force / inch ; and (ii) the toe sole or the outer sole heel have a durability ratio between 0.8 and 1.5.

[0063] Embodiment F. A method for producing a shoe, the method comprising:

A) Sewing the sole heel of the outer sole on the heel part of the first forehead of the midsole;

B) Sewing the finger patch of the outsole on the toe portion of the first face of the midsole.

C) Attach the cushion insert to the heel portion of the other face of the midsole.

D) stitching the top, the top forming the inner part to receive the foot of the person, the inner part comprising the finger recess and the heel depression, the midsole, the midsole having (i) the fingertips, (ii) the heel end, (iii) the inner side and (iv ) the outer side, wherein the stitching (D) leads to the circumference of the midsole being sewn to the top, thereby forming a bottom for the inner part which is delimited by the first seam;

(E) gluing the insert to the bottom of the inner part;

wherein the stitching (A) and stitching (B) forms the space between the heel calf of the outsole sewn on the heel portion of the first midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inner side to the outer side and taking the intermediate place between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside.

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the finger recess is hidden in the heel recess and wherein (i) the insole is not sutured to the top or midsole and (ii) the outer sole heel and the outer sole of the outer sole are made of an elastomer.

[0064] Embodiment G. A method for manufacturing a shoe, the method comprising:

A) Sewing the sole heel of the outer sole on the heel part of the first forehead of the midsole;

B) Sewing the finger patch of the outsole on the toe portion of the first face of the midsole.

C) sewing the top, the top forming the inner part to receive the foot of the person, the inner part comprising the finger recess and the heel depression, the midsole, the midsole having (i) the fingertips, (ii) the heel end, (iii) the inner side and (iv ) the outer side, whereby the stitching (C) leads to the circumference of the midsole being sewn to the top, thereby forming a bottom for the inner part which is delimited by the first seam;

(D) gluing the insert to the bottom of the inner part;

wherein the stitching (A) and stitching (B) forms the space between the heel calf of the outsole sewn on the heel portion of the first midsole and (ii) the finger patch of the outsole sewn on the toe portion of the first midsole, spacing extending from the inner side to the outer side and taking the intermediate place between the fingertip end and the heel end, thereby allowing the entire shoe to be folded around the axis at a gap between the inner side and the outside.

wherein the shoe is configured to fold between (i) a stretched condition, wherein the outer sole heel and the outer sole of the outer sole are coplanar or substantially coplanar and (ii) a composite state in which the shoe is bent about an axis such that the top portion comprises the toe is hidden in the heel recess and wherein (i) the area of ​​the shoe defined by the outer sole heel patch and including the corresponding midsole part and the insert has a constant elasticity between 0.45 kilo-force / inch and 0.55 kilo-force / inch ; and (ii) the toe sole or the outer sole heel have a durability ratio between 0.8 and 1.5.

[0065] Embodiment H-1. Any of examples A, B, C, D, E, F and G, wherein the midsole is made of leather.

[0066] Embodiment H-2. Any of examples A, B, C, D, E, F and G, wherein the bottom of the inner part then comprises a foam filling and wherein the insert is attached by a foam-filled adhesive.

[0067] Embodiment H-3. Any one of Examples A, B, C, D, E, F and G, wherein the inner portion then includes a pinned insert that is glued to the heel portion of the second midsole.

[0068] Embodiment H-4. Embodiment H-2, wherein the midsole includes a second forehead having a heel portion and a toe portion and wherein the inner portion then includes a cushion insert that is glued to the heel portion of the second midsole fore and the foam filler adhered to (i) the gusset. cushion and (ii) the toe portion of the other face of the midsole.

[0069] Embodiment H-5. Embodiment H-3, wherein the pin cushion is characteristic of the first end and the second end, wherein the first end of the cushion insert is glued to the first part of the heel portion and the other end of the cushion insert is glued to the second part of the heel portion, the first part of the part The heel is closer to the toe portion of the second midsole than the second part of the heel, and the first end of the cushion has a thickness that is smaller than the other end of the cushion.

[0070] Embodiment H-6. Embodiment of H-3, wherein the cushion insert has a thickness that increases along the cushion as a function of the distance from the toe portion of the other face of the midsole such that the cushion portion closest to the midsole is thinner than the cushion insert portion which is farthest from the toe part of the middle.

[0071] Embodiment H-7. Embodiment H-3, wherein the cushion insert comprises an ethylene-vinyl acetate or polyurethane material.

[0072] Embodiment H-8. An embodiment with H-3, the pin insert has a Shore A hardness between 45 and 70 or between 60 and 70.

[0073] Embodiment H-9. Embodiment of H-3, wherein the cushion insert has a density between 0.30 g / cm³ a 0.7 g / cm³.

[0074] Embodiment H-10. Embodiment of H-3, wherein the cushion insert has a density between 0.40 g / cm³ a 0.7 g / cm³.

[0075] Embodiment H-11. Any one of Examples A, B, C, D, E, F and G, wherein the first groove having a depth of at least 3/64 inches is formed close to the perimeter of the outer sole heel and the heel bevel of the outer sole is sewn on the heel part of the first the midsole face with the first weft that occupies the first groove; and a second groove having a depth of at least 3/64 inches formed in the vicinity of the periphery of the outer sole of the finger patch, and wherein the finger patch of the outsole is sewn on the toe portion of the first midsole with the second weft that occupies the second groove; and [0076] Embodiment H-12. Any of examples A, B, C, D, E, F and G, the top being formed as a single element having a first end and a second end, the first end and the second end being joined by the second seam in the heel recess. [0077] Embodiment H-13. Any of examples A, B, C, D, E, F and G, the top being formed as a single element having (i) a first end, (ii) a second end, (iii) a first edge and (iv) a second edge, a first edge the end and the second end are joined by the second seam in the heel recess, the first edge is sewn to the midsole circumference, thereby forming a bottom for the inner portion, the first part of the second edge being characterized by a restraining rib, the second edge not extending into the heel.

[0078] Embodiment H-14. Any one of Examples A, B, C, D, E, F and G, wherein the second part of the second edge is characterized by an Achilles cushion that provides the boundary of the top of the heel.

[0079] Embodiment H-15. Any of the examples A, B, C, D, E, F and G, the top being formed as a single element having a first end and a second end, a first end and a second end being joined by a second seam in a heel recess, and a crescent element covering a part bottom of the second seam.

[0080] Embodiment H-16. Any of examples A, B, C, D, E, F and G, wherein the shoe is in a folded state and is pressed into a pouch having a loop.

[0081] Embodiment H-17. An embodiment of H-16, wherein the pouch has a pocket for holding a shopping bag, the shopping bag being adapted to accommodate a pair of shoes.

[0082] Embodiment H-18. Any of the examples A, B, C, D, E, F and G, wherein the shoe is in a folded state and is pressed into a compact box having a lid.

[0083] Embodiment H-19. Any one of embodiments A, B, C, D, E, F and G, wherein the rear corner of the finger patch of the outsole is within 1/4 of the portion of the first seam.

[0084] Embodiment H-20. Any one of embodiments A, B, C, D, E, F and G, wherein the rear corner of the finger patch of the outer sole is within 3/16 in. Of the first seam portion.

[0085] Embodiment H-21. Any one of embodiments A, B, C, D, E, F and G, wherein the front corner of the finger patch of the outsole is within 1/4 inch of the portion of the first seam.

[0086] Embodiment H-22. Any one of Embodiments A, B, C, D, E, F and G, wherein the backward corner of the heel of the outer sole is within 3/16 in. Of the first seam portion.

[0087] Embodiment H-23. Any one of Embodiments A, B, C, D, E, F and G, wherein the posterior heel of the outer sole heel is within 1/4 inch of the first seam portion.

[0088] Embodiment H-24. Any of the examples A, B, C, D, E, F and G, wherein the outer sole of the outer sole or heel of the outer sole has a durability between 0.8 and 1.5.

[0089] Embodiment H-25. Any of examples A, B, C, D, E, F and G, wherein the outer sole of the outer sole or heel of the outer sole has a durability between 1.0 and 1.3.

[0090] Embodiment H-26. Any of examples A, B, C, D, E, F and G, wherein the outer sole heel and the outer sole of the outer sole are each at least 3/32 inches thick.

[0091] Embodiment H-27. Any of the examples A, B, C, D, E, F and G, wherein the outer sole heel and the outer sole of the outer sole are each about 5/32 inches thick.

[0092] Embodiment H-28. Any of the examples A, B, C, D, E, F and G, the spacing being between 4/8 inch and 6/8 inch.

[0093] Embodiment H-29. Any of the examples A, B, C, D, E, F and G, the gap being about 5/8 inches.

[0094] Embodiment H-30. Any one of embodiments A, B, C, D, E, F and G, the side of the heel of the outer sole being visible at least 45 degrees from the level when the shoe is worn on the foot of a person standing at a level.

[0095] Embodiment H-31. Any one of embodiments A, B, C, D, E, F and G, the side of the finger patch of the outer sole being visible at least at a 45-degree angle from the level when the shoe is worn on the foot of a person standing at a level.

[0096] Embodiment H-32. Any of examples A, B, C, D, E, F and G, wherein the shoe area defined by the outer sole heel patch and including the corresponding midsole portion, and the insert has a constant spring between 0.40 kilo-force / inch and 0 , 70 kilo-force / inch.

[0097] Embodiment H-33. Any one of Examples A, B, C, D, E, F and G, wherein the shoe area is defined by the outer sole heel patch and including the corresponding midsole portion, and the insert has a constant elasticity between 0.45 kilo-force / inch and 0 , 55 kilo-force / inch.

[0098] Embodiment H-34. Any of examples A, B, C, D, E, F and G, wherein the shoe area is defined by a finger patch of the outsole and comprising a corresponding midsole portion, and the insert has a constant spring between 0.40 kilo-force / inch and 0 , 70 kilo-force / inch.

[0099] Embodiment H-35. Any of examples A, B, C, D, E, F and G, wherein the shoe area is defined by a finger patch of the outsole and comprising a corresponding midsole portion, and the insert has a constant elasticity between 0.45 kilo-force / inch and 0 , 55 kilo-force / inch.

[0100] Embodiment H-36. Any of examples A, B, C, D, E, F and G, wherein the shoe is a women's shoe.

[0101] Embodiment H-37. Any of examples A, B, C, D, E, F and G, wherein the shoe is a male shoe.

[0102] Embodiment H-38. Any of the examples A, B, C, D, E, F and G, wherein the shoe is a shoe for men, women and children.

CITED REFERENCES AND VARIENT EXAMPLES OF EMBODIMENT [0103] Many modifications and variations can be made to this invention without departing from its scope, which will be apparent to those skilled in the art. The embodiments described herein are only proposed by way of example. Embodiments have been chosen and described to best explain the principles of the invention and its practical applications, thereby enabling other skill in the art to make the best use of the invention and various embodiments with various modifications that are suited to the particular application contemplated.

[0104] This description extends to various footwear styles (in addition to the typical ballerina / slipper shown in the figures). For example, sandals, flip-flops, sports shoes and for active people can be made with a similar construction for flexible compression and compact storage and are fully within the scope of the invention. While embodiments have been described that are designed for women, it should further be assumed that shoes can be designed for men, children or any combination of a woman, a man or a child. Any different designs are fully within the scope of the description.

[0105] The design of the shoe core and the compacting panniers offers considerable potential for surface variation by decorating, materials and colors, increasing their commercial appeal. Different construction methods may include gluing the outer soles to the midsole without any sewing. The invention is limited only by the terms in the appended claims, together with the full scope of equivalents for which the claims have been designated.