CA1044888A - Sole of a footwear - Google Patents
Sole of a footwearInfo
- Publication number
- CA1044888A CA1044888A CA233,643A CA233643A CA1044888A CA 1044888 A CA1044888 A CA 1044888A CA 233643 A CA233643 A CA 233643A CA 1044888 A CA1044888 A CA 1044888A
- Authority
- CA
- Canada
- Prior art keywords
- sole
- sole body
- reinforcing plate
- recesses
- rear half
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/06—Footwear with health or hygienic arrangements ventilated
- A43B7/08—Footwear with health or hygienic arrangements ventilated with air-holes, with or without closures
- A43B7/081—Footwear with health or hygienic arrangements ventilated with air-holes, with or without closures the air being forced from outside
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/0045—Footwear characterised by the material made at least partially of deodorant means
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/42—Filling materials located between the insole and outer sole; Stiffening materials
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/10—Low shoes, e.g. comprising only a front strap; Slippers
- A43B3/108—Low shoes, e.g. comprising only a front strap; Slippers characterised by the sole
Abstract
A SOLE OF A FOOTWEAR
ABSTRACT OF THE DISCLOSURE
A sole of a footwear comprises a soft sole body provided at a rear half thereof with at least one upwardly opening recess and a rigid or semi-rigid reinforcing plate serving also as an in-sole which is mounted on said rear half of said sole body so as to cover said recess.
ABSTRACT OF THE DISCLOSURE
A sole of a footwear comprises a soft sole body provided at a rear half thereof with at least one upwardly opening recess and a rigid or semi-rigid reinforcing plate serving also as an in-sole which is mounted on said rear half of said sole body so as to cover said recess.
Description
lU~
The present invention relates to a sole (including an outersole, an insole and a heel section) of a footwear such as a shoe, sandal or the like, particularly to a sole wh;ch permits the improve-ment of walking efficiency, prevents of fatigue of a wearer's foot from long time wear and increases comfortableness-to-wear.
When a sole is formed soft all over and therefore flex-ible, a wearer can walk at a speedy space and sufficiently tread on the sole, obtaining an improved walking efficiency. In view of this, it may be considered that a thoroughly soft sole is better. On the other hand, however, long time standing or walking in such a soft sole makes a wearer's foot fatigued.
Therefore, the front and rear halves of a sole require different conditions respectively depending on the functions exercised in the walking action. The front half of the sole requires softness and flexibility so as to improve walking efficiency. On the contrary, the rear half inevitably requires hardness and inflexibility since a heel, the main portion of a foot, is disposed thereon. When the rear half of a sole is inflexible, a foot is stably and comfortably sup-ported, being free from fatique.
Further, a sole as a whole requires resiliency and pli-ability. If the front and rear halves are completely separately formed of soft and hard materials respectively with the intention of meeting the above-mentioned different requirements at the same time, the sole as a whole is not provided with resiliency and pliability, and due to a border formed between the two halves, the footwear becomes uncomfort-able to wear and easy to break to shorten its life. In view of these respects, the inventor has succeeded in developing a sole which can ful-fill the different and common requirements of the front and rear halves at the same time, thereby improving durability of a footwear as well as making it comfortable to wear.
Therefore, in a sole according to the present invention, a sole body comprising a front and rear halves is formed of non-rigid ~3'~
synthetic resin material, and the rear half of the sole body is pro-vided with upwardly opening recesses, and at the same time a rigid or semi-rigid reinforcing plate (shape-retaining plate) of a suitable thickness also serving as an insole is mounted on the upper surface of at least the rear half.
In a preferred embodinlent of the present invention, a sole body is molded of a suitable composition of soft vinyl chloride, plas-ticizer, stabilizer or the like mixed with foaming agent by a molding method including a foaming step, whereby the sole body is provided with desirable resiliency and pliability. The rear half of the sole body is provided with a plurality of upwardly opening recesses and a reinforc-ing plate also serving as an insole mounted thereon so as to cover the recesses. The reinforcing plate may be formed of polyethylene, poly-propylene, nylon or ABS resin or similar kind of hard synthetic resin material, or compos-ite material-of synthetic resin and metal, said plate providing the rear half of the sole body with rigidness and shape-retaining property. For mounting the plate on the upper surface of the rear-half of-the sole bodyj a plurality of~ downward projections are integrally provided on the lower surface of the reinforcing plate, while a plurality of holes corresponding to the projections are provid-ed on the upper surface of the rear half of the sole body so that by fitting the projections into the holes the rigid reinforcing plate is fixed on the sole body. In the required positions of the recesses there may be provided dermatophytosis medicine, a drying agent, deo-dorizer, aromatic agent and/or cutitis medicine.
The reinforcing plate may be adapted either to cover only the rear half surface of the sole body or may be extended to the front half surface so as to cover the whole of the sole body. In the latter case, the front half of the reinforcing plate is to be thinner so as to obtain flexibility.
When walking in a sandal provided especially with a re-inforcing plate only on the rear half of the sole body, the surface of lV4~
the heel section of the sandal momentarily leaves the footsole, thereby eliminating difficulties in walking.
Further, by providing a plurality of grooves upwardly opening and communicated with one another and further communicated with the recesses in the rear half of the sole body, the rear half of the sole body is repeatedly subject to compression and restoration actions caused by the displacement of the wearer's weight to increase or de-crease the capacity of each recess thus effecting pumping action. In other words, the recesses serve as pumping chamber and air compressed therein flows through the grooves comlllunicated with the recessès toward the front half of the sole body or into the front portion of the upper.
Further, the grooves in the front half, when covered with a foot put thereon, form tubular spaces. And when the tubes come to the open state, the recesses take suction action, while when the rear half of the sole body shifts from the compression action to the restoration action the air in the front half returns to the recesses in the rear half of the sole body. In this manner, air inside the footwear can continuously flow, so that air can pass between the footsole and the surface of the sole body. And especially in case of a shoe, outer air can be flowed into the upper, or wet air inside the upper exhausted outside according to the above-mentioned air flow, thus effecting so-called ventilation. A number of grooves provided in the front half of the sole body can effect a pumping action due to the increase or de-crease in the capacity thereof caused by the flexion of the front half of the sole body in the walking action. Therefore, ventilation can be effected only by the front half. Further, the grooves can help the air in the pumping chamber to flow out.
Besides, by providing recesses in the rear half of the sole body so as to open upwardly, soil or pebble is prevented from entering from the bottom surface into the recesses. Since the recesses are defined on the upper portion of the sole body instead of the lower portion as in the conventional method, larger capacity of recesses can 10~
be formed thereby making the shoe the lighter. It is because the sole becomes unstable when large recesses are formed in the lower surface thereof, decreasing the ground contact area.
Other features and advantages of the present invention will become more apparent from the following description of the embodi-ments given with reference to the appended drawings, in which:
Fig. 1 is a longitudinal section of a sandal of an embodi-ment of the present invention;
Fig. 2 is a plan view of the sandal of Fig. l;
Fig. 3 is a section taken along the line III - III of Fig.
l;
Fig. 4 is a section taken along the line IV - IV of Fig.
l;
Figs. 5 and 6 are longitudinal sections of modifications of the reinforcing plate in the sole of Fig. l;
Fig. 7 is a longitudinal section of a sole for a sandal of another embodiment of the present invention;
Fig. 8 is a partly cut-away plan view of the sole of Fig.
l;
Fig. ~ is a longitudinal section of a sole for a shoe of a further embodiment of the present invention; and Fig. 10 is a partly cut-away plan view of the sandal of Fig. l;
Figs. 1 - 3 illustrate a sandal. In the drawing there is shown sole body 1 formed of non-rigid plastics material. For example, the sole body is molded of non-rigid PVC compound comprising 100 parts of vinyl chloride resin, 70 parts of dioctyl phthalate (plasticizer), 20 parts of azodicarbonamid (foaming agent), 3 parts of stearate (stabilizer), 0.5 part of stearic acid (smoothing agent), a suitable coloring agent and others. The sole body lhas a relatively hard non-foamy surface layer, and soft and pliable foamed inside. The rear half of the sole body 1 is provided with a plurality of recesses 2 opening upwardly or in the upper surface of the sole body. Numberal 3 indicates a reinforcing plate serving also as an insole. The re-inforcing plate 3 is formed of rigid plastics material and has a suit-able thickness so as to prevent the flexion of the rear half. The plate 3 is fitted into the recesses provided on the upper surface of the rear half of the sole body, forming also an insole in continuation with the upper surface of the front half of the sole body. The plate 3 is formed e.g. of a rigid PVC compound comprising 100 parts of vinyl chloride resin, 3 parts of dioctyl phthalate (plasticizer), 3 parts of stearate, 0.5 part of stearic acid, a suitable coloring agent and the like. If 10 - 15 instead of 3 parts of dioctyl phthalate is used in this compound, semi-rigid vinyl chloride compound is obtained. The plate 3 serving also as an insole is provided with a plurality of projections 5 ... extended integrally from the lower surface thereof, the projections 5 ... being fitted into holes 6 ... provided in the upper surface of the rear half of the sole body whereby the plate 3 is fixed to the solè body 1.
On the surfaces of the sole body 1 and the reinforcing plate 3 there are provided raised peripheral portions 7a and 8a in such a manner that the periphery of the whole sole is outwardly raised by a gradual slope. Further, raised portions 7b and 7c are formed on the front half surface corresponding to the joint of foot fingers and in an intermediate recessed portion corresponding to the arch of the foot, respecti~ely so as to follow the shape of a foot sole. The reinforcing plate is partly cut away in the portion corresponding to the raised portion 7c.
A reinforcing plate 3' serving also as an insole as shown in Fig. 5 comprises synthetic resin section 3a of non-rigid, rigid or semi-rigid synthetic resin material and a metal plate section 3b em-bedded in the said synthetic resin section 3a.
Numeral 9 indicates band with two ends embedded in the sole body 1. For example, the two ends of a preformed band are inserted into 10~
a sole body molding cavity and molten synthetic resin isinjected there-into, whereby a so1e body is molded and at the same time the hand and the sole body are connected together. Alternatively, a sole body and a band may be preliminarily formed respectively and then connected to-gether by an adhesive agent or by seaming.
Fig. 6 illustrates a reinforcing plate 13 serving also as an insole formed of rigid synthetic resin material by extending a re-inforcing plate 3 as shown in Fig. 1 onto the front half of the sole body so as to cover substantially the whole of the upper surface of the sole body, the extended front half of which is formed relatively thinner so as not to lose flexibility thereof. Such a reinforcing plate 13 is preferably applied to a shoe.
A sole as shown in F;gs. 7 and 8 is a modification of a sole of Figs. 1 and 2, in which there are provided a plurality of grooves lla ... opening upwardly in the front half of the sole body 11, a plurality of other grooves llb ... in the rear half of the sole body adapted to communicate the former grooves with recesses 2 ...provided in the rear half, and a plurality of communicating grooves llc ... for communicating the recesses with one another. By such a construction, in the walking action, the rear half of the sole body, especially the heel section thereof, is compressed and restored, thereby increasing and decreasing the capacity of each recess 2 to effect pumping action therein. That is, air in each recess 2 is sent through the grooves llb below the reinforcing plate 3 into the grooves lla in the front half of the sole body whereby air is blown between the footsole and the upper surface of the front surface of the sole body and conversely outside air is sent through the grooves lla and llb into the recesses 2 thus affording to effect ventilation always in the walking action to improve comfortableness-to-wear of the sandal. Ventilation is especial-ly required on hot days in summer. The non-rigid foamed synthetic resin material of the sole becomes softer as the temperature rises, thereby strengthening the pumping action in the recesses 2 caused by the 1 0~ 8 displacement of the wearer's weight applied on the sole body in the walking action.
Figs. 9 and lO illustrate a shoe in which a reinforcing plate serving also as an insole as shown in Fig. 6 and a sole body as shown in Figs. 7, 8 are applied. The reinforcing plate 23 serving also as an insole has a front section 23A extended forwardly so <lS ~0 cover the front half of the sole body 21, the extended front secLion being provided with a number of through holes. And the reinforcing plate is fixed through a plurality of projections 26 ... provided on the rear surface thereof to the sole body 21. The sole body 21 is provided at the periphery thereof with a peripheral wall 27 integrally extended upwardly from the upper surface thereof by a suitable height and having a curved inside surface 27a corresponding to the lower periphery of an upper to be connected therewith. Further, the inside of the peripheral wall 27 is provided with a groove 28 along the wall, intc which the lower peripheral edge of the upper lO as shown in imaginary line in Fig. 9 is fitted. The peripheral wall 27 and the lower peripheral edge of the upper are connected together by seaming with thread or an adhesive agent. The sole body 21 is molded of non-rigid synthetic resin material e.g. a non-rigid PVC compound, while the reinforcing plate 23 serving also as an insole is molded of a rigid PVC compound.
The sole body 21 has substantially the same construction and functions as those of the sole body of Figs. 5 and 6. In the walking action, air in the recesses 2 ... flows through the groove 21b into the groove 21a in the front half of the sole body, past the through holes 23a ... in the reinforcing plate into the upper 10 of the shoe, or air in the upper is sucked through the said through holes 23a to the recesses 2 ... in the rear half of the sole body, thereby effect-ing ventilation. The reinforcing plate 23 may be further provided with small holes communicated with the pumping chambers or the recesses 2 while, if desired, outside air holes may be provided in the non-rigid i 0 ~ 8 synthetic resin section of the lateral peripheral wall of the pumping chamber near the bottom so as to be communicated with outs;de for im-proving ventilation.
In the sole as shown in Figs. 7 - 10, in which pumping action is effected, the re;nforcing plate and the upper surface of the sole body need to be closely contacted together for maintaining air tightness. Therefore, in mounting the reinforcing plate, preferably, it is surely and closely fixed to the sole body by using an adhesive agent as well as fitting its projections into the recesses in the latter.
As mentioned above, a sole according to the present in-vention comprises a sole body ;nclud;ng the front and rear halves thereof formed of non-rigid synthetic resin material and a su;tably th;ck reinforcing plate mounted on the said rear half, the sole as a - whole has regiliency and pliability, with the soft and flexible fronthalf and the rigid and inflexible rear half, permitting the improve-ment in walking efficiency as well as preventing fat;gue of the Foot through a long time use. Therefore, according to the present ;nvent70n an ideal footwear can be provided. Further, since the recesses are ~o formed in the rear half of the sole body so as to open upwardly, soil or pebble is prevented from intruding ;nto the bottom thereof and at the same t;me the sole and consequently the footwear become lighter in we;ght. Lastly, since the reinforcing plate (shape-retaining member) is situated on the upper portion of the footwear, variety in design is achieved by varifying the color and shape of the sole body of non-rigid synthetic res;n mater;al.
The present invention relates to a sole (including an outersole, an insole and a heel section) of a footwear such as a shoe, sandal or the like, particularly to a sole wh;ch permits the improve-ment of walking efficiency, prevents of fatigue of a wearer's foot from long time wear and increases comfortableness-to-wear.
When a sole is formed soft all over and therefore flex-ible, a wearer can walk at a speedy space and sufficiently tread on the sole, obtaining an improved walking efficiency. In view of this, it may be considered that a thoroughly soft sole is better. On the other hand, however, long time standing or walking in such a soft sole makes a wearer's foot fatigued.
Therefore, the front and rear halves of a sole require different conditions respectively depending on the functions exercised in the walking action. The front half of the sole requires softness and flexibility so as to improve walking efficiency. On the contrary, the rear half inevitably requires hardness and inflexibility since a heel, the main portion of a foot, is disposed thereon. When the rear half of a sole is inflexible, a foot is stably and comfortably sup-ported, being free from fatique.
Further, a sole as a whole requires resiliency and pli-ability. If the front and rear halves are completely separately formed of soft and hard materials respectively with the intention of meeting the above-mentioned different requirements at the same time, the sole as a whole is not provided with resiliency and pliability, and due to a border formed between the two halves, the footwear becomes uncomfort-able to wear and easy to break to shorten its life. In view of these respects, the inventor has succeeded in developing a sole which can ful-fill the different and common requirements of the front and rear halves at the same time, thereby improving durability of a footwear as well as making it comfortable to wear.
Therefore, in a sole according to the present invention, a sole body comprising a front and rear halves is formed of non-rigid ~3'~
synthetic resin material, and the rear half of the sole body is pro-vided with upwardly opening recesses, and at the same time a rigid or semi-rigid reinforcing plate (shape-retaining plate) of a suitable thickness also serving as an insole is mounted on the upper surface of at least the rear half.
In a preferred embodinlent of the present invention, a sole body is molded of a suitable composition of soft vinyl chloride, plas-ticizer, stabilizer or the like mixed with foaming agent by a molding method including a foaming step, whereby the sole body is provided with desirable resiliency and pliability. The rear half of the sole body is provided with a plurality of upwardly opening recesses and a reinforc-ing plate also serving as an insole mounted thereon so as to cover the recesses. The reinforcing plate may be formed of polyethylene, poly-propylene, nylon or ABS resin or similar kind of hard synthetic resin material, or compos-ite material-of synthetic resin and metal, said plate providing the rear half of the sole body with rigidness and shape-retaining property. For mounting the plate on the upper surface of the rear-half of-the sole bodyj a plurality of~ downward projections are integrally provided on the lower surface of the reinforcing plate, while a plurality of holes corresponding to the projections are provid-ed on the upper surface of the rear half of the sole body so that by fitting the projections into the holes the rigid reinforcing plate is fixed on the sole body. In the required positions of the recesses there may be provided dermatophytosis medicine, a drying agent, deo-dorizer, aromatic agent and/or cutitis medicine.
The reinforcing plate may be adapted either to cover only the rear half surface of the sole body or may be extended to the front half surface so as to cover the whole of the sole body. In the latter case, the front half of the reinforcing plate is to be thinner so as to obtain flexibility.
When walking in a sandal provided especially with a re-inforcing plate only on the rear half of the sole body, the surface of lV4~
the heel section of the sandal momentarily leaves the footsole, thereby eliminating difficulties in walking.
Further, by providing a plurality of grooves upwardly opening and communicated with one another and further communicated with the recesses in the rear half of the sole body, the rear half of the sole body is repeatedly subject to compression and restoration actions caused by the displacement of the wearer's weight to increase or de-crease the capacity of each recess thus effecting pumping action. In other words, the recesses serve as pumping chamber and air compressed therein flows through the grooves comlllunicated with the recessès toward the front half of the sole body or into the front portion of the upper.
Further, the grooves in the front half, when covered with a foot put thereon, form tubular spaces. And when the tubes come to the open state, the recesses take suction action, while when the rear half of the sole body shifts from the compression action to the restoration action the air in the front half returns to the recesses in the rear half of the sole body. In this manner, air inside the footwear can continuously flow, so that air can pass between the footsole and the surface of the sole body. And especially in case of a shoe, outer air can be flowed into the upper, or wet air inside the upper exhausted outside according to the above-mentioned air flow, thus effecting so-called ventilation. A number of grooves provided in the front half of the sole body can effect a pumping action due to the increase or de-crease in the capacity thereof caused by the flexion of the front half of the sole body in the walking action. Therefore, ventilation can be effected only by the front half. Further, the grooves can help the air in the pumping chamber to flow out.
Besides, by providing recesses in the rear half of the sole body so as to open upwardly, soil or pebble is prevented from entering from the bottom surface into the recesses. Since the recesses are defined on the upper portion of the sole body instead of the lower portion as in the conventional method, larger capacity of recesses can 10~
be formed thereby making the shoe the lighter. It is because the sole becomes unstable when large recesses are formed in the lower surface thereof, decreasing the ground contact area.
Other features and advantages of the present invention will become more apparent from the following description of the embodi-ments given with reference to the appended drawings, in which:
Fig. 1 is a longitudinal section of a sandal of an embodi-ment of the present invention;
Fig. 2 is a plan view of the sandal of Fig. l;
Fig. 3 is a section taken along the line III - III of Fig.
l;
Fig. 4 is a section taken along the line IV - IV of Fig.
l;
Figs. 5 and 6 are longitudinal sections of modifications of the reinforcing plate in the sole of Fig. l;
Fig. 7 is a longitudinal section of a sole for a sandal of another embodiment of the present invention;
Fig. 8 is a partly cut-away plan view of the sole of Fig.
l;
Fig. ~ is a longitudinal section of a sole for a shoe of a further embodiment of the present invention; and Fig. 10 is a partly cut-away plan view of the sandal of Fig. l;
Figs. 1 - 3 illustrate a sandal. In the drawing there is shown sole body 1 formed of non-rigid plastics material. For example, the sole body is molded of non-rigid PVC compound comprising 100 parts of vinyl chloride resin, 70 parts of dioctyl phthalate (plasticizer), 20 parts of azodicarbonamid (foaming agent), 3 parts of stearate (stabilizer), 0.5 part of stearic acid (smoothing agent), a suitable coloring agent and others. The sole body lhas a relatively hard non-foamy surface layer, and soft and pliable foamed inside. The rear half of the sole body 1 is provided with a plurality of recesses 2 opening upwardly or in the upper surface of the sole body. Numberal 3 indicates a reinforcing plate serving also as an insole. The re-inforcing plate 3 is formed of rigid plastics material and has a suit-able thickness so as to prevent the flexion of the rear half. The plate 3 is fitted into the recesses provided on the upper surface of the rear half of the sole body, forming also an insole in continuation with the upper surface of the front half of the sole body. The plate 3 is formed e.g. of a rigid PVC compound comprising 100 parts of vinyl chloride resin, 3 parts of dioctyl phthalate (plasticizer), 3 parts of stearate, 0.5 part of stearic acid, a suitable coloring agent and the like. If 10 - 15 instead of 3 parts of dioctyl phthalate is used in this compound, semi-rigid vinyl chloride compound is obtained. The plate 3 serving also as an insole is provided with a plurality of projections 5 ... extended integrally from the lower surface thereof, the projections 5 ... being fitted into holes 6 ... provided in the upper surface of the rear half of the sole body whereby the plate 3 is fixed to the solè body 1.
On the surfaces of the sole body 1 and the reinforcing plate 3 there are provided raised peripheral portions 7a and 8a in such a manner that the periphery of the whole sole is outwardly raised by a gradual slope. Further, raised portions 7b and 7c are formed on the front half surface corresponding to the joint of foot fingers and in an intermediate recessed portion corresponding to the arch of the foot, respecti~ely so as to follow the shape of a foot sole. The reinforcing plate is partly cut away in the portion corresponding to the raised portion 7c.
A reinforcing plate 3' serving also as an insole as shown in Fig. 5 comprises synthetic resin section 3a of non-rigid, rigid or semi-rigid synthetic resin material and a metal plate section 3b em-bedded in the said synthetic resin section 3a.
Numeral 9 indicates band with two ends embedded in the sole body 1. For example, the two ends of a preformed band are inserted into 10~
a sole body molding cavity and molten synthetic resin isinjected there-into, whereby a so1e body is molded and at the same time the hand and the sole body are connected together. Alternatively, a sole body and a band may be preliminarily formed respectively and then connected to-gether by an adhesive agent or by seaming.
Fig. 6 illustrates a reinforcing plate 13 serving also as an insole formed of rigid synthetic resin material by extending a re-inforcing plate 3 as shown in Fig. 1 onto the front half of the sole body so as to cover substantially the whole of the upper surface of the sole body, the extended front half of which is formed relatively thinner so as not to lose flexibility thereof. Such a reinforcing plate 13 is preferably applied to a shoe.
A sole as shown in F;gs. 7 and 8 is a modification of a sole of Figs. 1 and 2, in which there are provided a plurality of grooves lla ... opening upwardly in the front half of the sole body 11, a plurality of other grooves llb ... in the rear half of the sole body adapted to communicate the former grooves with recesses 2 ...provided in the rear half, and a plurality of communicating grooves llc ... for communicating the recesses with one another. By such a construction, in the walking action, the rear half of the sole body, especially the heel section thereof, is compressed and restored, thereby increasing and decreasing the capacity of each recess 2 to effect pumping action therein. That is, air in each recess 2 is sent through the grooves llb below the reinforcing plate 3 into the grooves lla in the front half of the sole body whereby air is blown between the footsole and the upper surface of the front surface of the sole body and conversely outside air is sent through the grooves lla and llb into the recesses 2 thus affording to effect ventilation always in the walking action to improve comfortableness-to-wear of the sandal. Ventilation is especial-ly required on hot days in summer. The non-rigid foamed synthetic resin material of the sole becomes softer as the temperature rises, thereby strengthening the pumping action in the recesses 2 caused by the 1 0~ 8 displacement of the wearer's weight applied on the sole body in the walking action.
Figs. 9 and lO illustrate a shoe in which a reinforcing plate serving also as an insole as shown in Fig. 6 and a sole body as shown in Figs. 7, 8 are applied. The reinforcing plate 23 serving also as an insole has a front section 23A extended forwardly so <lS ~0 cover the front half of the sole body 21, the extended front secLion being provided with a number of through holes. And the reinforcing plate is fixed through a plurality of projections 26 ... provided on the rear surface thereof to the sole body 21. The sole body 21 is provided at the periphery thereof with a peripheral wall 27 integrally extended upwardly from the upper surface thereof by a suitable height and having a curved inside surface 27a corresponding to the lower periphery of an upper to be connected therewith. Further, the inside of the peripheral wall 27 is provided with a groove 28 along the wall, intc which the lower peripheral edge of the upper lO as shown in imaginary line in Fig. 9 is fitted. The peripheral wall 27 and the lower peripheral edge of the upper are connected together by seaming with thread or an adhesive agent. The sole body 21 is molded of non-rigid synthetic resin material e.g. a non-rigid PVC compound, while the reinforcing plate 23 serving also as an insole is molded of a rigid PVC compound.
The sole body 21 has substantially the same construction and functions as those of the sole body of Figs. 5 and 6. In the walking action, air in the recesses 2 ... flows through the groove 21b into the groove 21a in the front half of the sole body, past the through holes 23a ... in the reinforcing plate into the upper 10 of the shoe, or air in the upper is sucked through the said through holes 23a to the recesses 2 ... in the rear half of the sole body, thereby effect-ing ventilation. The reinforcing plate 23 may be further provided with small holes communicated with the pumping chambers or the recesses 2 while, if desired, outside air holes may be provided in the non-rigid i 0 ~ 8 synthetic resin section of the lateral peripheral wall of the pumping chamber near the bottom so as to be communicated with outs;de for im-proving ventilation.
In the sole as shown in Figs. 7 - 10, in which pumping action is effected, the re;nforcing plate and the upper surface of the sole body need to be closely contacted together for maintaining air tightness. Therefore, in mounting the reinforcing plate, preferably, it is surely and closely fixed to the sole body by using an adhesive agent as well as fitting its projections into the recesses in the latter.
As mentioned above, a sole according to the present in-vention comprises a sole body ;nclud;ng the front and rear halves thereof formed of non-rigid synthetic resin material and a su;tably th;ck reinforcing plate mounted on the said rear half, the sole as a - whole has regiliency and pliability, with the soft and flexible fronthalf and the rigid and inflexible rear half, permitting the improve-ment in walking efficiency as well as preventing fat;gue of the Foot through a long time use. Therefore, according to the present ;nvent70n an ideal footwear can be provided. Further, since the recesses are ~o formed in the rear half of the sole body so as to open upwardly, soil or pebble is prevented from intruding ;nto the bottom thereof and at the same t;me the sole and consequently the footwear become lighter in we;ght. Lastly, since the reinforcing plate (shape-retaining member) is situated on the upper portion of the footwear, variety in design is achieved by varifying the color and shape of the sole body of non-rigid synthetic res;n mater;al.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A footwear sole comprising an injection molded plastic soft and flexible sole body having front and rear portions and pro-vided in the rear portion thereof with at least one upwardly opening recess and a reinforcing plate serving also as an insole which is mounted on the rear portion of said sole body over said recess and which extends from the rear end of the sole body to the approximate midportion of the sole body, the reinforcing plate being formed of relatively rigid material whereby the reinforcing plate rigidifies the rear portion of the sole and maintains the shape of the sole while the front portion of the sole remains soft and flexible.
2. A sole as claimed in claim 1 in which the sole body is a soft and flexible injection molded plastic body.
3. The sole of claim 1, in which the reinforcing plate is removably connected to the sole body.
4. The sole of claim 1, 2 or 3 in which the reinforcing plate includes a plurality of downwardly extending projections, the sole body being provided with a plurality of recesses into which the projections are removably inserted whereby the reinforcing plate is removably connected to the sole body.
5. The sole of claim 1, 2 or 3 in which the front portion of the sole body is provided with a plurality of upwardly opening grooves which communicate with said recess in the rear half of the sole body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975060450U JPS5429946Y2 (en) | 1975-05-01 | 1975-05-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044888A true CA1044888A (en) | 1978-12-26 |
Family
ID=13142614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA233,643A Expired CA1044888A (en) | 1975-05-01 | 1975-08-18 | Sole of a footwear |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4020569A (en) |
| JP (1) | JPS5429946Y2 (en) |
| BR (1) | BR7507844A (en) |
| CA (1) | CA1044888A (en) |
| DE (1) | DE2536561A1 (en) |
| FR (1) | FR2309170A1 (en) |
| GB (1) | GB1512246A (en) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814201B2 (en) * | 1976-09-27 | 1983-03-17 | 東洋ゴム工業株式会社 | Manufacturing method for shoe soles |
| US4262433A (en) * | 1978-08-08 | 1981-04-21 | Hagg Vernon A | Sole body for footwear |
| AU3009184A (en) * | 1983-08-15 | 1985-02-21 | Multiple Resources Vendor Inc. | Air shoe |
| US4663865A (en) * | 1985-01-14 | 1987-05-12 | Iwo Cilicia S.A.C.I.F.I.A. | Sport shoes |
| US4689898A (en) * | 1985-09-11 | 1987-09-01 | Fahey Brian W | Running shoe |
| US5572805A (en) * | 1986-06-04 | 1996-11-12 | Comfort Products, Inc. | Multi-density shoe sole |
| EP0278031B1 (en) * | 1987-02-10 | 1990-05-09 | Herbert Dr.-Ing. Funck | Resilient sole for sports and leasure shoes |
| AU1455988A (en) * | 1987-05-21 | 1988-11-24 | Bata Limited | Sole arrangement for footwear |
| US5060400A (en) * | 1989-06-27 | 1991-10-29 | Amasia International, Ltd. | Open toe/open heel shoe having replaceable inner sole |
| US5970630A (en) * | 1994-01-07 | 1999-10-26 | Gallegos Alvaro Z | Rigid midsole footware structure with removable undercarriage attaching means |
| DE9411782U1 (en) * | 1994-07-21 | 1994-10-06 | Heil & Hilfsmittel Vertr Gmbh | Forefoot relief shoe |
| IT1278358B1 (en) * | 1995-02-07 | 1997-11-20 | Scarpa Calzaturificio Spa | SOLE FOR FOOTWEAR. |
| US5787608A (en) * | 1996-07-30 | 1998-08-04 | Greenawalt; Kent S. | Custom-made footwear |
| US5901394A (en) * | 1996-07-30 | 1999-05-11 | Greenawalt; Kent S. | Custom-made footwear |
| US6205683B1 (en) | 1997-05-30 | 2001-03-27 | The Timberland Company | Shock diffusing, performance-oriented shoes |
| US5946824A (en) * | 1997-08-19 | 1999-09-07 | Orion Sports & Leisure, Inc. | Sole support structure for an athletic shoe |
| US6226894B1 (en) | 1998-05-11 | 2001-05-08 | R. G. Barry Corporation | Slipper and method for manufacturing slipper |
| US6115944A (en) * | 1998-11-09 | 2000-09-12 | Lain; Cheng Kung | Dynamic dual density heel bag |
| US6151807A (en) * | 1999-01-30 | 2000-11-28 | Qui; Yi-Ming | Health care shoe |
| GB2350279A (en) * | 1999-05-24 | 2000-11-29 | Internet World Sport | Footwear with solid or gel medicament |
| US6931763B2 (en) * | 2002-08-05 | 2005-08-23 | R.G. Barry Corporation | Slipper insole, slipper, and method for manufacturing a slipper |
| US6990754B2 (en) | 2002-08-05 | 2006-01-31 | R. G. Barry Corporation | Slipper insole, slipper, and method for manufacturing a slipper |
| US7347010B2 (en) * | 2003-03-28 | 2008-03-25 | Zu Sheng Yu | Shoe having a variety of lacing styles |
| US6962011B2 (en) * | 2003-09-24 | 2005-11-08 | Denis Burke Drennan | Shoe for a casted foot |
| US7124519B2 (en) * | 2004-01-14 | 2006-10-24 | Columbia Insurance Company | Shoe sole having improved flexibility and method for making the same |
| US20050160623A1 (en) * | 2004-01-27 | 2005-07-28 | Tian-An Liou | Air-ventilating shoe sole |
| US20070033835A1 (en) * | 2005-08-02 | 2007-02-15 | Bray Walter T Jr | Insole arrangement; footwear with insole arrangement; and, method of preparation |
| US7584553B1 (en) * | 2006-04-07 | 2009-09-08 | Medley Mark M | Flip flop golf sandal |
| EP1884693A1 (en) * | 2006-08-03 | 2008-02-06 | Fabrizio Nobili | Improved showerhead |
| WO2009060251A1 (en) * | 2007-11-09 | 2009-05-14 | David Fu | Footwear article |
| DE102009028627B4 (en) | 2009-08-18 | 2019-12-19 | Adidas Ag | Sports Shoe |
| US20160073726A1 (en) * | 2014-09-13 | 2016-03-17 | Yu-Te Wu | Foot supporting structure of a cycling shoe with improved ergonomics |
| US10342292B2 (en) * | 2015-01-19 | 2019-07-09 | Rockport Ip Holdings, Llc | Sole for footwear |
| US10285467B2 (en) * | 2015-04-14 | 2019-05-14 | Elisabetta Pianta | Footwear ornamentation assembly, ornamentation insert and related methods |
| US10506845B2 (en) * | 2016-12-15 | 2019-12-17 | Dansko, Llc | Rubber shoe sole, material, and methods for manufacturing the same |
| CN107518508B (en) * | 2017-09-01 | 2020-06-16 | 温州市华炜鞋材科技有限公司 | High-heeled shoe insole and processing method thereof |
| US20200029652A1 (en) * | 2018-07-26 | 2020-01-30 | Remington Products Company | Insole with a medicinal insert |
| US11589645B2 (en) * | 2018-12-03 | 2023-02-28 | Biopods Inc. | Variable reflex footwear technology |
| US11622602B2 (en) | 2020-08-18 | 2023-04-11 | Puma SE | Article of footwear having a sole plate |
| USD1011718S1 (en) | 2020-12-22 | 2024-01-23 | Puma SE | Shoe |
| USD969469S1 (en) | 2020-12-22 | 2022-11-15 | Puma SE | Shoe |
| USD1010297S1 (en) | 2021-06-30 | 2024-01-09 | Puma SE | Shoe |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US547645A (en) * | 1895-10-08 | Pneumatic sole and heel | ||
| FR768927A (en) * | 1933-04-24 | 1934-08-16 | Calzatura Aerata Medusa S A | Soles with ventilation chambers and their application to shoes |
| GB472955A (en) * | 1936-06-16 | 1937-10-04 | Us Rubber Prod Inc | Improvements in rubber soled footwear |
| FR1016002A (en) * | 1950-04-06 | 1952-10-30 | Shoe fitted with an automatic ventilation device | |
| GB999207A (en) * | 1960-11-02 | 1965-07-21 | Ver Nl Rubberfabrieken Nv | Improvements in or relating to foot-wear |
| AT249548B (en) * | 1963-04-22 | 1966-09-26 | Funck Kg Dr Ing | Shoe lower part |
| US3608215A (en) * | 1969-06-14 | 1971-09-28 | Tatsuo Fukuoka | Footwear |
| GB1339646A (en) * | 1970-10-19 | 1973-12-05 | Fukuoka T | Shoes |
| US3834046A (en) * | 1973-04-09 | 1974-09-10 | D Fowler | Shoe sole structure |
-
1975
- 1975-05-01 JP JP1975060450U patent/JPS5429946Y2/ja not_active Expired
- 1975-08-11 US US05/603,303 patent/US4020569A/en not_active Expired - Lifetime
- 1975-08-13 GB GB33722/75A patent/GB1512246A/en not_active Expired
- 1975-08-16 DE DE19752536561 patent/DE2536561A1/en active Pending
- 1975-08-18 CA CA233,643A patent/CA1044888A/en not_active Expired
- 1975-08-19 FR FR7525648A patent/FR2309170A1/en not_active Withdrawn
- 1975-11-26 BR BR7844/75A patent/BR7507844A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5429946Y2 (en) | 1979-09-21 |
| BR7507844A (en) | 1976-11-09 |
| FR2309170A1 (en) | 1976-11-26 |
| GB1512246A (en) | 1978-05-24 |
| US4020569A (en) | 1977-05-03 |
| JPS51141156U (en) | 1976-11-13 |
| DE2536561A1 (en) | 1976-11-11 |
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