Title of Invention	VAPOR-PERMEABLE AND WATERPRO OF SOLE FOR SHOES, PARTICULARY BUT NOT EXCLUSIVELY FOR OPEN SHOES SUCH AS SANDALS, SABOTS AND THE LINK, AND SHOES PROVIDED WITH THE SOLE
Abstract	A vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, comprising the following combination of elements: - a lower element (11, 111, 211, 311), on which a tread (12,112) is integrated in a downward region, said lower element (11, 111, 211, 311) being selected between an element that is vapor-permeable at least in an upward region and a perforated element; -an upper vapor-permeable and/or perforated element (13,113) and -a vapor-permeable and waterproof membrane (16,116, 216, 316), interposed between said lower element (11, 111, 211, 311) and said upper element (13,113), said membrane and said lower element (11, 111, 211, 311) and said upper element (13,113) being joined hermetically in the perimetric region of mutual contact.

Title of Invention

VAPOR-PERMEABLE AND WATERPRO OF SOLE FOR SHOES, PARTICULARY BUT NOT EXCLUSIVELY FOR OPEN SHOES SUCH AS SANDALS, SABOTS AND THE LINK, AND SHOES PROVIDED WITH THE SOLE

Abstract

A vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, comprising the following combination of elements: - a lower element (11, 111, 211, 311), on which a tread (12,112) is integrated in a downward region, said lower element (11, 111, 211, 311) being selected between an element that is vapor-permeable at least in an upward region and a perforated element; -an upper vapor-permeable and/or perforated element (13,113) and -a vapor-permeable and waterproof membrane (16,116, 216, 316), interposed between said lower element (11, 111, 211, 311) and said upper element (13,113), said membrane and said lower element (11, 111, 211, 311) and said upper element (13,113) being joined hermetically in the perimetric region of mutual contact.

Full Text	VAPOR-PERMEABLE AND WATERPROOF SOLE FOR SHOES, PARTICULARLY BUT NOT EXCLUSIVELY FOR OPEN SHOES SUCH AS SANDALS, SABOTS AND THE LIKE, AND SHOE PROVIDED WITH THE SOLE Technical Field The present invention relates to a vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like. Background Art The present invention also relates to a shoe provided with said sole. It is known that the comfort of a shoe is linked not only to correct anatomical fit but also to correct outward transmission of the water vapor formed inside the shoe due to sweating, in order to avoid the "damp toor nhenomenon. This permeation of the water vapor, however, must not compromise the waterproofness of the shoe, and therefore solutions have been studied which entrust vapor permeation to the upper or to the sole. As regards the upper, there are shoes with an upper made of vapor- permeable and waterproof material. However, this type of shoe does not effectively solve the problem of vapor permeation: the "damp foot"problem arises from the fact that during sweating the sweat evaporates from the foot and cools it If evaporation is prevented, the sweat condenses and leaves the foot damp. Most of the sweat of the foot is originated at the interface between the sole of the foot and the sole of the shoe, and it is evident that the sweat formed here is unable to evaporate, thus condensing on the plantar element on which the foot rests. Only a minimal part of the sweat evaporates through the upper, even if said upper is reduced to a minimum. Solutions to the problem are provided by vapor-permeable and waterproof soles, which accordingly allow permeation of the sweat generated at the sole of the foot. One of these solutions is disclosed in US-5,044,096 and EP-0382 904 by the same Applicant and consists in dividing the sole into two layers with through holes and in interposing a membrane that is impermeable to water and vapor-permeable and is joined perimetrically and hermetically to the two layers. Variations of this solution are disclosed in subsequent patents, all of which are in any case centered on dividing the sole into two layers, with the interposition of a waterproof and vapor-permeable membrane. In view of the fact that most of the sweat of the foot is generated at the interface between the sole of the foot and the sole of the shoe, the "damp foot" problem is considerable even in open shoes, such as sandals, sabots, mules for seaside use, et cetera. These kinds of open shoe are generally constituted by an upper that only partially wraps around the foot insertion region and by a multilayer sole. With reference from the top downwardly, such multilayer sole comprises a first layer, which makes direct contact with the foot and is generally made of leather or synthetic material. If such layer is made of non-vapor-permeable material (such as for example mules for seaside use), sweat condenses immediately, leaving an almost instantaneous feeling of dampness at the foot. If the layer is made of a vapor-permeable material that has some absorbent power, the foot remains dry until such layer becomes impregnated with sweat. Below the first layer there is a second layer, which is generally contoured anatomically and is generally made of an expanded or compact material, such as polyurethane, cork, wood, expanded rubbers, et cetera. Finally, there is a tread, which makes contact with the ground and can be made of synthetic material (rubber, polyurethane), natural material (leather), or mixed material. The various layers are coupled by means of adhesives or, as an alternative, by injection-molding the various layers of polymeric material over the others. Below the second layer, if it is made of soft or low-consistency material, there is a supporting layer, so as to provide a rigidity and hardness that allow to glue the flaps of the upper between the tread and said supporting layer. For open shoes that must have a certain comfort degree, it is important that the supporting plantar element (or insole) be sufficiently soft and anatomically contoured. This leads to the need to use, for the second layer (and optionally also for the third layer), soft materials, such as "sponges" or the like, in order to accommodate the foot and surround its sole. However, this surrounding prevents correct circulation of the air between the skin of the foot and the plantar element on which the foot rests, leading to almost immediate condensation, which cannot be dissipated through the sole. Furthermore, the foot transfers heat to the surrounding material, which retains it and produces a "padding" effect that further overheats the foot. If a rigid plantar element were used, the foot would have fewer points of contact with said plantar element, allowing better ventilation and optimum cooling of the foot. Therefore, as the rigidity of the plantar element increases (and therefore the comfort of the shoe decreases), the freshness of the foot increases. Vice versa, the lower the rigidity and hardness of the plantar element (and therefore the greater the comfort degree of the shoe), the stronger the "sweaty foot" effect. Moreover, as already mentioned, lack of vapor permeation of the layers below the foot leads to almost immediate condensation on the sole of the foot. This lack of permeation is due both to the type of materials used (particularly for the tread) and to any films of adhesive that join the various layers. The causes of the "sweaty foot" effect in open shoes provided with an anatomically contoured soft plantar element can therefore be summarized in three aspects: the surrounding of the foot by the anatomically contoured layer, which prevents correct recirculation of air between the sole and the plantar element; the "padding" effect caused by said surrounding; and the lack of permeation of the sweat in the direction of the tread. Disclosure of the Invention The aim of the present invention is to provide a vapor-permeable and, waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, that allows to solve the problems met in known types. Within this aim, an important object of the present invention is to provide a vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, that is comfortable both in terms of fit and of vapor permeation of the sole of the foot. Another important object of the present invention is to provide a vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, that while maintaining characteristics of comfort for the foot reduces the padding effect with respect to the foot. Another object of the present invention is to provide a vapor- permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, that allows correct recirculation of air between the skin of the sole of the foot and the supporting plantar element. Another object of the present invention is to provide a shoe with a vapor-permeable and waterproof sole, particularly but not exclusively of the open type such as sandals, sabots and the like, that is comfortable both in terms of fit and of vapor permeation of the sole of the foot. This aim and these and other objects that will become better apparent hereinafter are achieved by a vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, characterized in that it comprises the following combination of elements: — a lower element, on which a tread is integrated in a downward region, said lower element being selected between an element that is vapor- permeable at least in an upward region and a perforated element; -- an upper vapor-permeable and/or perforated element; — a vapor-permeable and waterproof membrane, interposed between said lower element and said upper element, said membrane and said lower and upper elements being joined hermetically in the perimetric regions of mutual contact, ~ at least one vapor-permeable comfort layer, which is included in said lower element and/or in said upper element and is made of three- dimensional fabric, forming a ventilation gap. Advantageously, the invention includes a shoe provided with said sole. Brief description of the drawings Further characteristics and advantages of the invention will become better apparent from the description of some preferred but not exclusive embodiments thereof, illustrated by way of nonlimiting example in the accompanying drawings, wherein: Figure 1 is a longitudinal sectional view of an open shoe of the sandal type, using a first embodiment of a sole according to the invention; Figure 2 is an enlarged-scale view of Figure 1; A protective element 18, constituted by a layer of hydrolysis-resistant, water-repellent, vapor-permeable or perforated material, is coupled to said membrane at the face that is directed toward the lower element 11. Said protective element 18 has the same plan dimensions as the membrane 16. The area occupied in plan view by the membrane 16 is the same area occupied by the through holes formed through the lower element 11 and the upper element 13. The upper element 13 is arranged substantially above the membrane 16 and consists of multiple layers, all of which are vapor-permeable or perforated, as described hereinafter. The upper layer of said upper element 13 consists of a first layer 13a made of vapor-permeable and/or perforated material, such as for example perforated leather. Below said first layer 13a a second layer is provided, which coincides with, or is the very vapor-permeable comfort layer 14, made of a three- dimensional fabric. Said three-dimensional fabric forms a ventilation gap 19, which is deformed only partially under the weight of a person, avoiding total collapse of said gap and thus always maintaining a ventilation space. Openwork fabrics of the mesh type, known as "mesh" in shoe-making jargon, are produced and used as vapor-permeable uppers or internal linings, particularly in sports shoes. Fabrics that combine a needle-punched element with the mesh fabric and are known as "air mesh" are known as a derivative of said mesh fabrics. In this embodiment, the three-dimensional fabric of said vapor- permeable comfort layer 14 is of the air mesh type or is in any case a needle- punched fabric of suitable strength. Below said vapor-permeable comfort or second layer 14 a third 20 is provided, which is contoured anatomically with respect to the sole of the foot and is made for example of expanded matenal that is apertorated; substantially at right angles to the extension of the sole 10 In particular, the vapor-permeable comfort layer 14 has smaller plan dimensions than said third layer 20 and is arranged inside a comDlemeniarv flat cavity formed centrally with respect to said third layer. In this embodiment, a fourth layer 21 is provided below the third layer 20 and is perforated at right angles to the extension of the sole: said fourth layer 21 is necessary when the upper layers are unable to ensure the correct rigidity or hardness of the entire upper element 13 and can therefore be optional in other embodiments. In different embodiments (not shown in the figures), said fourth layer 21 can be vapor-permeable instead of perforated and can also be arranged in other positions, such as for example between the second vapor-permeable comfort layer 14 and the third layer 20. Furthermore, said fourth layer 21, if provided so as to protrude with respect to the second layer 14 and the third layer 20, can be used to allow any external stitched seams. The leather of the first layer Ba is directed outwardly so as to fit the sole by wrapping around the edge of the second layer 14 or optionally also wrapping around the lateral edge of the third layer 20, as in the case of so- called "fussbett" plantar elements. A second embodiment of the sole according to the invention is shown in Figure 3 and is designated by the reference numeral 100. Like the first described embodiment, said sole 100 comprises a lower element 111, on which a tread 112 for contact with the ground is integrated in a downward region, and an upper element 113. Said upper element 113 is composed of a plurality of layers, similar to those of the sole 10, shown in the first embodiment. A vapor-permeable comfort layer 114 is provided between said layers and is made of a three-dimensional fabric that forms a ventilation gap 119 which, under the weight of a person, undergoes only a partial deformation, avoiding complete collapse of said gap and thus always maintaining a ventilation space. In this embodiment also, said three-dimensional fabric is of the air mesh type or is in any case a needle-punched fabric. A vapor-permeable and waterproof membrane 116 is interposed between the lower element 111 and the upper element 113 and is sealed perimetrically to the sole 100. In this second embodiment, along the plan extension of the upper part of the lower element 111 there is a portion 117 that is provided with lateral venting elements 106 between the outside of the sole 100 and the inside of said portion 117. Said lateral venting elements 106 are functionally connected to the membrane 116. In particular, in this second embodiment, said portion 117 has, in its central part, a hollow region 117a that is delimited perimetrically by edges 117b, on which said lateral venting elements 106 are provided; said venting elements are constituted by through venting channels 107 that functionally connect the inside of the hollow region 117a and the outside of the sole 100. A layer-like element 120 that is structured like a lattice, forms cavities and is perforated substantially at right angles to the extension of the sole is arranged inside said hollow region 117a. A variation of said second embodiment 100, shown in Figure 4 and designated by the reference numeral 100a, has a vapor-permeable element 120a instead of the latticed layer-like element 120. A third embodiment of the sole according to the invention, which is a variation with respect to said second embodiment, is shown in Figure 5 and designated by the reference numeral 200. In said third embodiment, protrusions 220a extend substantially at right angles to the extension of the sole from the inside of the hollow region (now designated by the reference numeral 217a) formed in the central part of the upper portion 217 of the lower element 211 and form a lattice-like structure that forms cavities. Said protrusions 220a have a height that is substantially equal to the depth of said hollow region 217a. The protective element 218 of the vapor-permeable and waterproof membrane 216 is arranged so as to rest on the protrusions 220a. A fourth embodiment of the sole according to the invention, which is a variation with respect to said second embodiment, is shown in Figure 6 and is designated by the reference numeral 300. In this fourth embodiment, the upper portion (now designated by the reference numeral 317) of the lower element 311 is constituted by a corresponding vapor-permeable layer-like element 320, which lies along the entire transverse extension of the upper part 317; in this case, the lateral venting elements are provided by the vapor-permeable layer-like element 320 proper (the element 320 is vapor-permeable both vertically and horizontally). Above the vapor-permeable layered element 320 there is the membrane 316, with the protective element 318. Different embodiments of the soles 100, 200, 300 are designated respectively in Figures 7, 8 and 9 by the reference numerals 400, 500, 600. Said figures show a combination of lateral venting elements 406, 506, 606 (which are different depending on the respective variation) and of holes, respectively 415, 515,615, that pass through the tread. Other variations (not shown in the figures) can include other vapor- permeable comfort layers made of three-dimensional fabric, which are arranged for example directly below the main vapor-permeable comfort layer already described or in any case depending on the requirements of optimum modulation of the hardness of the sole. The invention further provides a shoe formed with a sole thus described. The proposed figures are sectional views of shoes of the sandal type, which use the soles thus described; in said figures, the upper of the shoes is designated by the reference numeral 50, 150, 150a, 250, 350 respectively. The flaps of said uppers are coupled in a known manner to the respective soles. the mutual fixing of the various layers and elements of the soles thus described can include spot adhesive bonding, such as to avoid forming layers of adhesive on the vapor-permeable or perforated layers that would block the outflow of sweat and the passage of air. Said fixing can also be achieved by means of merely perimetric gluing (therefore outside the area occupied by the membrane and by the various holes), by means of stitched seams, heat-sealing with thermoformation, or other known types of systems. In practice it has been found that the invention thus described solves the problems noted in known types of vapor-permeable and waterproof soles; in particular, the present invention provides a vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, that allows optimum vapor permeability of the sole of the foot together with a comfortable fit. The present invention in fact provides a sole with a soft plantar element that is obtained by means of a three-dimensional fabric of the air mesh type, which allows optimum ventilation between the skin of the sole of the foot and the plantar element. Moreover, said three-dimensional fabric avoids the padding effect caused by the surrounding arrangement, since it does not retain heat. Furthermore, the vapor-permeable structure allows effective vapor permeation and venting of the sweat in a downward direction, which is closed by the tread; the waterproof membrane prevents the dirt and moisture present on the ground from being transmitted to the sole of the foot, and at WE CLAIM 1. A vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, comprising the following combination of elements: — a lower element (11,111,211,311), on which a tread (12,112) is integrated in a downward region, said lower element (11,111,211,311) being selected between an element that is vapor-permeable at least in an upward region and a perforated element; -- an upper vapor-permeable and/or perforated element (13,113); -- a vapor-permeable and waterproof membrane (16, 116, 216, 316), interposed between said lower element (11, 111, 211, 311) and said upper element (13, 113), said membrane and said lower element (11, 111, 211, 311) and said upper element (13, 113) being joined hermetically in the perimetric regions of mutual contact, characterized in that - said upper element (13, 113) comprises a first layer (13a) for contact with the sole of the foot that fits said sole, which is made of vapor- permeable and/or perforated material, a second layer that is constituted by at least one vapor-permeable comfort layer (14, 114), arranged below said first layer (13a) and made of three-dimensional fabric, forming a ventilation gap (19, 119) and a third layer (20) that is provided below said vapor-permeable comfort layer (14, 114) 2. The sole for shoes as claimed in claim 1, wherein said third layer (20) is contoured anatomically with respect to the sole of the foot and is vapor-permeable and/or perforated, said vapor-permeable comfort layer (14, 114) having smaller plan dimensions than said third layer (20) and being arranged inside a complementary flat cavity formed centrally with respect to said third layer (20). 3. The sole for shoes as claimed claim 2, wherein a fourth perforated or vapor-permeable layer (21) for modulating the hardness of said sole is provided below said third layer (20). 4. The sole for shoes as claimed in one or more of the preceding claims, wherein it comprises two vapor-permeable comfort layers (14,114) arranged in series to each other. 5. The sole for shoes as claimed in one or more of claim 2 to 4, wherein said first layer (13a) is made of perforated leather. 6. The sole for shoes as claimed in one or more of claim 2 to 5, wherein said third layer (20) is made of expanded material that is perforated substantially at right angles to the extension of said sole. 7. The sole for shoes as claimed in one or more of claim 2 to 6, wherein said first layer (13a) is folded outwardly so as to wrap around the edge of said second layer (14). 8. The sole for shoes as claimed in one or more of claim 2 to 6, wherein said first layer (13a) is folded outwardly so as to wrap around the lateral edge of said third layer (20). 9. The sole for shoes as claimed in one or more of the preceding claims, wherein said three-dimensional fabric is of the air mesh type. 10. The sole for shoes a as claimed in one or more of the preceding claims, wherein said three-dimensional fabric is of the needle-punched type. 11. The sole for shoes as claimed in one or more of the preceding claims, wherein along the plan extension of the upper part of said lower element (111) there is a portion (117, 217, 317) provided with lateral venting elements (106, 206) between the outside of said sole (100, 100a, 200, 300, 400, 500, 600) and the inside of said portion (117, 217, 317), said lateral venting elements (106, 206) being functionally connected to said membrane (116, 216, 316). 12. The sole for shoes as claimed in claim 11, wherein said portion (117) has, in its central part, a hollow region (117a, 217a), which is delimited perimetrically by edges (117b), said lateral venting elements (106, 206) being formed in said edges (117b) and being constituted by through venting channels (107) for functional connection between the inside of said hollow region (117a, 217a) and the outside of said sole (100, 100a, 200, 300,400, 500, 600). 13. The sole for shoes as claimed in claim 12, wherein a layer-like latticed element (120) is arranged inside said hollow region (117a), forms cavities and is perforated substantially at right angles to the extension of the sole. 14. The sole for shoes as claimed claim 12, wherein a vapor- permeable element (120a) is arranged inside said hollow region (117a). 15. The sole for shoes as claimed in claim 12, wherein protrusions (220a) extend from the inside of said hollow region (217a) substantially at right angles to the extension of said sole (200), said protrusions forming a lattice-like structure that forms cavities, said protrusions (220a) having a height that is substantially equal to the depth of said hollow region (217a). 16. The sole for shoes as claimed in claim 12, wherein said upper portion (317) of said lower element (311) is constituted by a corresponding vapor-permeable layer-like element (320) that extends along the entire transverse extension of said upper part (317). 17. The sole for shoes as claimed in one or more of the preceding claims, wherein said lower element (11, 111, 211, 311) has a plurality of through holes (15, 415, 515, 615) that are substantially perpendicular to the extension of said sole. 18. The sole for shoes as claimed in one or more of the preceding claims, wherein a protective element (18, 118, 218, 318) is coupled to said membrane (16, 116, 216, 316) at the face that is directed toward said lower element (11, 111,211,311) and is constituted by a layer of a material that is resistant to hydrolysis, water-repellent, vapor-permeable or perforated, said protective element (18, 118, 218, 318) having the same plan dimensions as said membrane (16, 116, 216, 316). 19. The sole for shoes as claimed in one or more of the preceding claims, wherein said lower element (11, 111, 211, 311) and said upper element (13, 113) are fixed by spot gluing or perimetric gluing of the various component layers. 20. A shoe, particularly but not exclusively of the open type such as sandals, sabots and the like, comprising a sole as claimed in one or more of the preceding claims. A vapor-permeable and waterproof sole for shoes, particularly but not exclusively for open shoes such as sandals, sabots and the like, comprising the following combination of elements: - a lower element (11, 111, 211, 311), on which a tread (12,112) is integrated in a downward region, said lower element (11, 111, 211, 311) being selected between an element that is vapor-permeable at least in an upward region and a perforated element; -an upper vapor-permeable and/or perforated element (13,113) and -a vapor-permeable and waterproof membrane (16,116, 216, 316), interposed between said lower element (11, 111, 211, 311) and said upper element (13,113), said membrane and said lower element (11, 111, 211, 311) and said upper element (13,113) being joined hermetically in the perimetric region of mutual contact.

Full Text

VAPOR-PERMEABLE AND WATERPROOF SOLE FOR SHOES,
PARTICULARLY BUT NOT EXCLUSIVELY FOR OPEN SHOES SUCH
AS SANDALS, SABOTS AND THE LIKE, AND SHOE PROVIDED
WITH THE SOLE
Technical Field
The present invention relates to a vapor-permeable and waterproof
sole for shoes, particularly but not exclusively for open shoes such as
sandals, sabots and the like.
Background Art
The present invention also relates to a shoe provided with said sole.
It is known that the comfort of a shoe is linked not only to correct
anatomical fit but also to correct outward transmission of the water vapor
formed inside the shoe due to sweating, in order to avoid the "damp toor
nhenomenon.
This permeation of the water vapor, however, must not compromise
the waterproofness of the shoe, and therefore solutions have been studied
which entrust vapor permeation to the upper or to the sole.
As regards the upper, there are shoes with an upper made of vapor-
permeable and waterproof material.
However, this type of shoe does not effectively solve the problem of
vapor permeation: the "damp foot"problem arises from the fact that during
sweating the sweat evaporates from the foot and cools it If evaporation is
prevented, the sweat condenses and leaves the foot damp.
Most of the sweat of the foot is originated at the interface between the
sole of the foot and the sole of the shoe, and it is evident that the sweat
formed here is unable to evaporate, thus condensing on the plantar element
on which the foot rests. Only a minimal part of the sweat evaporates through
the upper, even if said upper is reduced to a minimum.
Solutions to the problem are provided by vapor-permeable and
waterproof soles, which accordingly allow permeation of the sweat

generated at the sole of the foot.
One of these solutions is disclosed in US-5,044,096 and EP-0382 904
by the same Applicant and consists in dividing the sole into two layers with
through holes and in interposing a membrane that is impermeable to water
and vapor-permeable and is joined perimetrically and hermetically to the
two layers.
Variations of this solution are disclosed in subsequent patents, all of
which are in any case centered on dividing the sole into two layers, with the
interposition of a waterproof and vapor-permeable membrane.
In view of the fact that most of the sweat of the foot is generated at
the interface between the sole of the foot and the sole of the shoe, the "damp
foot" problem is considerable even in open shoes, such as sandals, sabots,
mules for seaside use, et cetera.
These kinds of open shoe are generally constituted by an upper that
only partially wraps around the foot insertion region and by a multilayer
sole.
With reference from the top downwardly, such multilayer sole
comprises a first layer, which makes direct contact with the foot and is
generally made of leather or synthetic material.
If such layer is made of non-vapor-permeable material (such as for
example mules for seaside use), sweat condenses immediately, leaving an
almost instantaneous feeling of dampness at the foot.
If the layer is made of a vapor-permeable material that has some
absorbent power, the foot remains dry until such layer becomes impregnated
with sweat.
Below the first layer there is a second layer, which is generally
contoured anatomically and is generally made of an expanded or compact
material, such as polyurethane, cork, wood, expanded rubbers, et cetera.
Finally, there is a tread, which makes contact with the ground and can
be made of synthetic material (rubber, polyurethane), natural material

(leather), or mixed material.
The various layers are coupled by means of adhesives or, as an
alternative, by injection-molding the various layers of polymeric material
over the others.
Below the second layer, if it is made of soft or low-consistency
material, there is a supporting layer, so as to provide a rigidity and hardness
that allow to glue the flaps of the upper between the tread and said
supporting layer.
For open shoes that must have a certain comfort degree, it is
important that the supporting plantar element (or insole) be sufficiently soft
and anatomically contoured.
This leads to the need to use, for the second layer (and optionally also
for the third layer), soft materials, such as "sponges" or the like, in order to
accommodate the foot and surround its sole.
However, this surrounding prevents correct circulation of the air
between the skin of the foot and the plantar element on which the foot rests,
leading to almost immediate condensation, which cannot be dissipated
through the sole.
Furthermore, the foot transfers heat to the surrounding material,
which retains it and produces a "padding" effect that further overheats the
foot.
If a rigid plantar element were used, the foot would have fewer points
of contact with said plantar element, allowing better ventilation and
optimum cooling of the foot.
Therefore, as the rigidity of the plantar element increases (and
therefore the comfort of the shoe decreases), the freshness of the foot
increases. Vice versa, the lower the rigidity and hardness of the plantar
element (and therefore the greater the comfort degree of the shoe), the
stronger the "sweaty foot" effect.
Moreover, as already mentioned, lack of vapor permeation of the

layers below the foot leads to almost immediate condensation on the sole of
the foot. This lack of permeation is due both to the type of materials used
(particularly for the tread) and to any films of adhesive that join the various
layers.
The causes of the "sweaty foot" effect in open shoes provided with an
anatomically contoured soft plantar element can therefore be summarized in
three aspects: the surrounding of the foot by the anatomically contoured
layer, which prevents correct recirculation of air between the sole and the
plantar element; the "padding" effect caused by said surrounding; and the
lack of permeation of the sweat in the direction of the tread.
Disclosure of the Invention
The aim of the present invention is to provide a vapor-permeable and,
waterproof sole for shoes, particularly but not exclusively for open shoes
such as sandals, sabots and the like, that allows to solve the problems met in
known types.
Within this aim, an important object of the present invention is to
provide a vapor-permeable and waterproof sole for shoes, particularly but
not exclusively for open shoes such as sandals, sabots and the like, that is
comfortable both in terms of fit and of vapor permeation of the sole of the
foot.
Another important object of the present invention is to provide a
vapor-permeable and waterproof sole for shoes, particularly but not
exclusively for open shoes such as sandals, sabots and the like, that while
maintaining characteristics of comfort for the foot reduces the padding
effect with respect to the foot.
Another object of the present invention is to provide a vapor-
permeable and waterproof sole for shoes, particularly but not exclusively for
open shoes such as sandals, sabots and the like, that allows correct
recirculation of air between the skin of the sole of the foot and the
supporting plantar element.

Another object of the present invention is to provide a shoe with a
vapor-permeable and waterproof sole, particularly but not exclusively of the
open type such as sandals, sabots and the like, that is comfortable both in
terms of fit and of vapor permeation of the sole of the foot.
This aim and these and other objects that will become better apparent
hereinafter are achieved by a vapor-permeable and waterproof sole for
shoes, particularly but not exclusively for open shoes such as sandals, sabots
and the like, characterized in that it comprises the following combination of
elements:
— a lower element, on which a tread is integrated in a downward
region, said lower element being selected between an element that is vapor-
permeable at least in an upward region and a perforated element;
-- an upper vapor-permeable and/or perforated element;
— a vapor-permeable and waterproof membrane, interposed between
said lower element and said upper element, said membrane and said lower
and upper elements being joined hermetically in the perimetric regions of
mutual contact,
~ at least one vapor-permeable comfort layer, which is included in
said lower element and/or in said upper element and is made of three-
dimensional fabric, forming a ventilation gap.
Advantageously, the invention includes a shoe provided with said
sole.
Brief description of the drawings
Further characteristics and advantages of the invention will become
better apparent from the description of some preferred but not exclusive
embodiments thereof, illustrated by way of nonlimiting example in the
accompanying drawings, wherein:
Figure 1 is a longitudinal sectional view of an open shoe of the sandal
type, using a first embodiment of a sole according to the invention;
Figure 2 is an enlarged-scale view of Figure 1;

A protective element 18, constituted by a layer of hydrolysis-resistant,
water-repellent, vapor-permeable or perforated material, is coupled to said
membrane at the face that is directed toward the lower element 11.
Said protective element 18 has the same plan dimensions as the
membrane 16.
The area occupied in plan view by the membrane 16 is the same area
occupied by the through holes formed through the lower element 11 and the
upper element 13.
The upper element 13 is arranged substantially above the membrane 16
and consists of multiple layers, all of which are vapor-permeable or perforated,
as described hereinafter.
The upper layer of said upper element 13 consists of a first layer 13a
made of vapor-permeable and/or perforated material, such as for example
perforated leather.
Below said first layer 13a a second layer is provided, which coincides
with, or is the very vapor-permeable comfort layer 14, made of a three-
dimensional fabric.
Said three-dimensional fabric forms a ventilation gap 19, which is
deformed only partially under the weight of a person, avoiding total collapse of
said gap and thus always maintaining a ventilation space.
Openwork fabrics of the mesh type, known as "mesh" in shoe-making
jargon, are produced and used as vapor-permeable uppers or internal linings,
particularly in sports shoes.
Fabrics that combine a needle-punched element with the mesh fabric
and are known as "air mesh" are known as a derivative of said mesh fabrics.
In this embodiment, the three-dimensional fabric of said vapor-
permeable comfort layer 14 is of the air mesh type or is in any case a needle-
punched fabric of suitable strength.
Below said vapor-permeable comfort or second layer 14 a third 20
is provided, which is contoured anatomically with respect to the sole of

the foot and is made for example of expanded matenal that is apertorated;
substantially at right angles to the extension of the sole 10
In particular, the vapor-permeable comfort layer 14 has smaller plan
dimensions than said third layer 20 and is arranged inside a comDlemeniarv
flat cavity formed centrally with respect to said third layer.
In this embodiment, a fourth layer 21 is provided below the third
layer 20 and is perforated at right angles to the extension of the sole: said
fourth layer 21 is necessary when the upper layers are unable to ensure the
correct rigidity or hardness of the entire upper element 13 and can therefore
be optional in other embodiments.
In different embodiments (not shown in the figures), said fourth layer
21 can be vapor-permeable instead of perforated and can also be arranged in
other positions, such as for example between the second vapor-permeable
comfort layer 14 and the third layer 20.
Furthermore, said fourth layer 21, if provided so as to protrude with
respect to the second layer 14 and the third layer 20, can be used to allow
any external stitched seams.
The leather of the first layer Ba is directed outwardly so as to fit the
sole by wrapping around the edge of the second layer 14 or optionally also
wrapping around the lateral edge of the third layer 20, as in the case of so-
called "fussbett" plantar elements.
A second embodiment of the sole according to the invention is shown
in Figure 3 and is designated by the reference numeral 100.
Like the first described embodiment, said sole 100 comprises a lower
element 111, on which a tread 112 for contact with the ground is integrated
in a downward region, and an upper element 113.
Said upper element 113 is composed of a plurality of layers, similar to
those of the sole 10, shown in the first embodiment.
A vapor-permeable comfort layer 114 is provided between said layers
and is made of a three-dimensional fabric that forms a ventilation gap 119

which, under the weight of a person, undergoes only a partial deformation,
avoiding complete collapse of said gap and thus always maintaining a
ventilation space.
In this embodiment also, said three-dimensional fabric is of the air
mesh type or is in any case a needle-punched fabric.
A vapor-permeable and waterproof membrane 116 is interposed
between the lower element 111 and the upper element 113 and is sealed
perimetrically to the sole 100.
In this second embodiment, along the plan extension of the upper part
of the lower element 111 there is a portion 117 that is provided with lateral
venting elements 106 between the outside of the sole 100 and the inside of
said portion 117.
Said lateral venting elements 106 are functionally connected to the
membrane 116.
In particular, in this second embodiment, said portion 117 has, in its
central part, a hollow region 117a that is delimited perimetrically by edges
117b, on which said lateral venting elements 106 are provided; said venting
elements are constituted by through venting channels 107 that functionally
connect the inside of the hollow region 117a and the outside of the sole 100.
A layer-like element 120 that is structured like a lattice, forms
cavities and is perforated substantially at right angles to the extension of the
sole is arranged inside said hollow region 117a.
A variation of said second embodiment 100, shown in Figure 4 and
designated by the reference numeral 100a, has a vapor-permeable element
120a instead of the latticed layer-like element 120.
A third embodiment of the sole according to the invention, which is a
variation with respect to said second embodiment, is shown in Figure 5 and
designated by the reference numeral 200.
In said third embodiment, protrusions 220a extend substantially at
right angles to the extension of the sole from the inside of the hollow region

(now designated by the reference numeral 217a) formed in the central part
of the upper portion 217 of the lower element 211 and form a lattice-like
structure that forms cavities.
Said protrusions 220a have a height that is substantially equal to the
depth of said hollow region 217a.
The protective element 218 of the vapor-permeable and waterproof
membrane 216 is arranged so as to rest on the protrusions 220a.
A fourth embodiment of the sole according to the invention, which is
a variation with respect to said second embodiment, is shown in Figure 6
and is designated by the reference numeral 300.
In this fourth embodiment, the upper portion (now designated by the
reference numeral 317) of the lower element 311 is constituted by a
corresponding vapor-permeable layer-like element 320, which lies along the
entire transverse extension of the upper part 317; in this case, the lateral
venting elements are provided by the vapor-permeable layer-like element
320 proper (the element 320 is vapor-permeable both vertically and
horizontally).
Above the vapor-permeable layered element 320 there is the
membrane 316, with the protective element 318.
Different embodiments of the soles 100, 200, 300 are designated
respectively in Figures 7, 8 and 9 by the reference numerals 400, 500, 600.
Said figures show a combination of lateral venting elements 406, 506, 606
(which are different depending on the respective variation) and of holes,
respectively 415, 515,615, that pass through the tread.
Other variations (not shown in the figures) can include other vapor-
permeable comfort layers made of three-dimensional fabric, which are
arranged for example directly below the main vapor-permeable comfort
layer already described or in any case depending on the requirements of
optimum modulation of the hardness of the sole.
The invention further provides a shoe formed with a sole thus

described.
The proposed figures are sectional views of shoes of the sandal type,
which use the soles thus described; in said figures, the upper of the shoes is
designated by the reference numeral 50, 150, 150a, 250, 350 respectively.
The flaps of said uppers are coupled in a known manner to the respective
soles.
the mutual fixing of the various layers and elements of the soles thus
described can include spot adhesive bonding, such as to avoid forming
layers of adhesive on the vapor-permeable or perforated layers that would
block the outflow of sweat and the passage of air.
Said fixing can also be achieved by means of merely perimetric
gluing (therefore outside the area occupied by the membrane and by the
various holes), by means of stitched seams, heat-sealing with
thermoformation, or other known types of systems.
In practice it has been found that the invention thus described solves
the problems noted in known types of vapor-permeable and waterproof
soles; in particular, the present invention provides a vapor-permeable and
waterproof sole for shoes, particularly but not exclusively for open shoes
such as sandals, sabots and the like, that allows optimum vapor permeability
of the sole of the foot together with a comfortable fit.
The present invention in fact provides a sole with a soft plantar
element that is obtained by means of a three-dimensional fabric of the air
mesh type, which allows optimum ventilation between the skin of the sole
of the foot and the plantar element.
Moreover, said three-dimensional fabric avoids the padding effect
caused by the surrounding arrangement, since it does not retain heat.
Furthermore, the vapor-permeable structure allows effective vapor
permeation and venting of the sweat in a downward direction, which is
closed by the tread; the waterproof membrane prevents the dirt and moisture
present on the ground from being transmitted to the sole of the foot, and at

WE CLAIM
1. A vapor-permeable and waterproof sole for shoes, particularly but
not exclusively for open shoes such as sandals, sabots and the like,
comprising the following combination of elements:
— a lower element (11,111,211,311), on which a tread (12,112) is
integrated in a downward region, said lower element (11,111,211,311)
being selected between an element that is vapor-permeable at least in an
upward region and a perforated element;
-- an upper vapor-permeable and/or perforated element (13,113);
-- a vapor-permeable and waterproof membrane (16, 116, 216, 316),
interposed between said lower element (11, 111, 211, 311) and said upper
element (13, 113), said membrane and said lower element (11, 111, 211,
311) and said upper element (13, 113) being joined hermetically in the
perimetric regions of mutual contact,
characterized in that
- said upper element (13, 113) comprises a first layer (13a) for contact
with the sole of the foot that fits said sole, which is made of vapor-
permeable and/or perforated material, a second layer that is constituted by at
least one vapor-permeable comfort layer (14, 114), arranged below said first
layer (13a) and made of three-dimensional fabric, forming a ventilation gap
(19, 119) and a third layer (20) that is provided below said vapor-permeable
comfort layer (14, 114)
2. The sole for shoes as claimed in claim 1, wherein said third layer
(20) is contoured anatomically with respect to the sole of the foot and is
vapor-permeable and/or perforated, said vapor-permeable comfort layer (14,
114) having smaller plan dimensions than said third layer (20) and being
arranged inside a complementary flat cavity formed centrally with respect to
said third layer (20).
3. The sole for shoes as claimed claim 2, wherein a fourth perforated
or vapor-permeable layer (21) for modulating the hardness of said sole is

provided below said third layer (20).
4. The sole for shoes as claimed in one or more of the preceding
claims, wherein it comprises two vapor-permeable comfort layers (14,114)
arranged in series to each other.
5. The sole for shoes as claimed in one or more of claim 2 to 4,
wherein said first layer (13a) is made of perforated leather.
6. The sole for shoes as claimed in one or more of claim 2 to 5,
wherein said third layer (20) is made of expanded material that is perforated
substantially at right angles to the extension of said sole.
7. The sole for shoes as claimed in one or more of claim 2 to 6,
wherein said first layer (13a) is folded outwardly so as to wrap around the
edge of said second layer (14).
8. The sole for shoes as claimed in one or more of claim 2 to 6,
wherein said first layer (13a) is folded outwardly so as to wrap around the
lateral edge of said third layer (20).
9. The sole for shoes as claimed in one or more of the preceding
claims, wherein said three-dimensional fabric is of the air mesh type.

10. The sole for shoes a as claimed in one or more of the preceding
claims, wherein said three-dimensional fabric is of the needle-punched type.
11. The sole for shoes as claimed in one or more of the preceding
claims, wherein along the plan extension of the upper part of said lower
element (111) there is a portion (117, 217, 317) provided with lateral
venting elements (106, 206) between the outside of said sole (100, 100a,
200, 300, 400, 500, 600) and the inside of said portion (117, 217, 317), said
lateral venting elements (106, 206) being functionally connected to said
membrane (116, 216, 316).
12. The sole for shoes as claimed in claim 11, wherein said portion
(117) has, in its central part, a hollow region (117a, 217a), which is
delimited perimetrically by edges (117b), said lateral venting elements (106,
206) being formed in said edges (117b) and being constituted by through

venting channels (107) for functional connection between the inside of said
hollow region (117a, 217a) and the outside of said sole (100, 100a, 200,
300,400, 500, 600).
13. The sole for shoes as claimed in claim 12, wherein a layer-like
latticed element (120) is arranged inside said hollow region (117a), forms
cavities and is perforated substantially at right angles to the extension of the
sole.
14. The sole for shoes as claimed claim 12, wherein a vapor-
permeable element (120a) is arranged inside said hollow region (117a).
15. The sole for shoes as claimed in claim 12, wherein protrusions
(220a) extend from the inside of said hollow region (217a) substantially at
right angles to the extension of said sole (200), said protrusions forming a
lattice-like structure that forms cavities, said protrusions (220a) having a
height that is substantially equal to the depth of said hollow region (217a).
16. The sole for shoes as claimed in claim 12, wherein said upper
portion (317) of said lower element (311) is constituted by a corresponding
vapor-permeable layer-like element (320) that extends along the entire
transverse extension of said upper part (317).
17. The sole for shoes as claimed in one or more of the preceding
claims, wherein said lower element (11, 111, 211, 311) has a plurality of
through holes (15, 415, 515, 615) that are substantially perpendicular to the
extension of said sole.
18. The sole for shoes as claimed in one or more of the preceding
claims, wherein a protective element (18, 118, 218, 318) is coupled to said
membrane (16, 116, 216, 316) at the face that is directed toward said lower
element (11, 111,211,311) and is constituted by a layer of a material that is
resistant to hydrolysis, water-repellent, vapor-permeable or perforated, said
protective element (18, 118, 218, 318) having the same plan dimensions as
said membrane (16, 116, 216, 316).
19. The sole for shoes as claimed in one or more of the preceding

claims, wherein said lower element (11, 111, 211, 311) and said upper
element (13, 113) are fixed by spot gluing or perimetric gluing of the
various component layers.
20. A shoe, particularly but not exclusively of the open type such as
sandals, sabots and the like, comprising a sole as claimed in one or more of
the preceding claims.

A vapor-permeable and waterproof sole for shoes, particularly but not
exclusively for open shoes such as sandals, sabots and the like, comprising
the following combination of elements:
- a lower element (11, 111, 211, 311), on which a tread (12,112) is
integrated in a downward region, said lower element (11, 111, 211, 311)
being selected between an element that is vapor-permeable at least in an
upward region and a perforated element;
-an upper vapor-permeable and/or perforated element (13,113) and
-a vapor-permeable and waterproof membrane (16,116, 216, 316),
interposed between said lower element (11, 111, 211, 311) and said upper
element (13,113), said membrane and said lower element (11, 111, 211,
311) and said upper element (13,113) being joined hermetically in the
perimetric region of mutual contact.

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Patent Number

229471

Indian Patent Application Number

326/KOLNP/2006

PG Journal Number

08/2009

Publication Date

20-Feb-2009

Grant Date

18-Feb-2009

Date of Filing

14-Feb-2006

Name of Patentee

GEOX S.P.A.

Applicant Address

VIA FELTRINA CENTER, 16 31044 MONTEBELLUNA, LOCALITA BIADENE

Inventors:

#	Inventor's Name	Inventor's Address
1	MARIO POLEGATO MORETTI	VIA ANTONINI 7-31035 CROCETTA DEL MONTELLO

PCT International Classification Number

A43B

PCT International Application Number

PCT/EP2004/07894

PCT International Filing date

2004-07-15

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	PD 2003A000166	2003-07-22	Italy