EP3078288A1 - Shoe with one-piece sole construction and active air ventilation - Google Patents

Abstract

The present invention relates to a method of manufacturing a shoe, comprising the steps of: providing a mounted shaft (1) with perforated insole (2), providing a one-piece sole construction (3) with a sole body and one or more recesses in the sole body, providing one Air pump means (5), providing a first air duct (7) extending at least partially within the shaft and adapted to supply air to the air pump means, providing a second air duct (10, 11) for discharging air from the air pump means is formed, providing a first valve (8), which is associated with the first air guide and adapted to pass air only in the direction from outside the sole structure to the air pump means, providing a second valve (9) associated with the second air guide and thereto is formed, air unmarried ch in the direction away from the air pumping device, and connecting the one-piece sole structure to the assembled shank with insole such that the air pumping device, the second air guide and the second valve are positioned between the insole and the one-piece sole structure in the one or more recesses.

Description

Field of the invention

The present invention relates to a shoe with a one-piece sole construction, in which with each step of the walking movement of a user an efficient air circulation in the shoe and thus directly at the foot of the user of the shoe is made possible and in particular a manufacturing method for such a shoe.

Background of the invention

A shoe consists of two main parts, namely the upper part, called the shank, and the lower part, the floor. The shank may include an inner shank (chuck), intermediate shank (intermediate chuck) and outer shank (upper leather). A shaft connected to an insole is called a mounted shaft. The floor may comprise a one-piece or multi-part outsole. Furthermore, the floor may be formed as a flat sole or heel sole.

Nowadays, shoes are known which are equipped in the sole with devices which are supposed to favor the air circulation in the shoe, whereby the internal moisture in the shoe is to be reduced in order to improve the foot comfort of the user of the shoe. This known shoe type generally provides hollow connections, which are accommodated in the sole interior connected to one another. According to a common variant, in the prior art, air is to be directed from outside to inside through openings in the sole. The openings are sealed with membranes to protect against water. However, it has been found that in this way no efficient fresh air supply is possible.

According to another variant, it may be provided to suck air from outside through an air pump device via an air duct, the open end in a Shank is guided upwards. The disadvantage of this type of shoes is the lack of efficiency of the air circulation in the shoe due to the inefficient suction of the air by means of the air pumping device, thus due to a lack of pumping effect

So will in the WO 00/01266 proposed to introduce an air pump device in a cavity of a shoulder of an outsole, which is to suck in air from the outside and through the sole body through an air supply, which is guided along the rear shaft of a shoe upwards. However, it has been found that by simply loading the air pumping device through the heel of a user in the shoe during the walking movement, the pumping mechanism operates so inefficiently that no significant ventilation of the shoe interior is possible.

In the WO 2008/156860 a ventilation device for insertion into a shoe is described in which by means of a hinged to a flange rotatable pump ventilation of a shoe interior, in which the ventilation device is used, is to be achieved. However, the ventilation device is structurally very complicated and mechanically prone to failure with the movable pump device.

In the WO 2012/126489 a sole construction is described with an air pumping device, which allows a relatively good air ventilation. The production of this sole construction, in which the air pump device is integrated into an upper and lower sole portion, however, is relatively complicated and expensive.

It is therefore an object of the present invention to provide a simple, reliable and cost-effective production method for a shoe with air circulation and a shoe with a sole construction, which ensures a more efficient and durable air circulation with the simplest possible structural design, as in the state the technology could not be reached so far.

Description of the invention

The above object is achieved by a method of manufacturing a shoe with the following steps. An assembled shaft and one-piece sole structure is provided with a sole body and one or more (outer) recesses in the sole body. The assembled shaft includes a connected to this insole.

The insole may be perforated so that, depending on the position of the air pump device, openings may be provided in the joint area and / or ball area (forefoot area). Through these openings, the ventilation of the liner takes place. The band sole can have a material in the heel area and / or joint area that is harder than the material in the ball area when the air pumping device is provided in the heel area. The recesses are provided in at least one surface of the sole body. The sole body has no voids inside and is injection molded in one piece. Preferably, the sole body made of soft and elastic material jump. Particularly suitable for this purpose are EVA (ethylene-vinyl acetate), (PU) polyurethane, molded or vulcanized rubber or TR (thermoplastic rubber). Preferably, the Shore hardness of these materials should be between 45 and 65 Shore A.

In particular, the air pump device can be provided in the heel region of the shoe and thus the sole construction, and in this case, an outer tread of the sole construction, ie the part of the sole construction which comes into contact with the ground during walking or running movements, can have an elevation in the heel region , This survey may also be provided in a paragraph in the heel area of the sole construction (ie in addition to the paragraph). Alternatively, the air pump device can be positioned in the joint area or in the ball area. Of course, while the sole structure is provided integrally with a sole body, it does not preclude other elements such as tread formation from being attached to the outside wall of the sole structure, for example the tread of the sole structure. For example, the sole body may have recesses on the tread in the inserts of material that is more resistant to abrasion than the material of the sole body is, for example, rubber, TPU (thermoplastic polyurethane) or compact PU, or PVC, can be used.

Further, an air pump means, a first air duct extending at least partially (eg, completely) within the shaft and adapted to supply air to the air pump means, a second air duct, which is formed for discharging air from the air pump means, a first valve associated with the first air guide and configured to allow air to pass only toward the outside of the sole structure toward the air pump device, and a second valve associated with the second air guide and configured to pass air only in the direction away from the air pump device; provided.

Additionally, the method includes the step of, in particular, directly connecting the one-piece sole structure to the assembled shaft such that the air pumping device, the second air guide, and the second valve position (directly) between the insole and the one-piece sole structure in the one or more recesses become. By "direct" bonding is here referred to a connection in which no further intermediate soles are provided between the shaft or the insole and the sole construction. It is not explicitly excluded that the air pump device and possibly the second or the second and first valve before joining on the underside of the insole (that is attached to the sole construction side of the insole using a applied to the insole plastic layer are attached can be done by gluing or molding the sole construction to the insole shank When gluing, the sole construction is formed beforehand, for example by injection molding, and then glued to the shank with insole Be set soling machine, the injection molds are closed and the sole structure of a suitable material, such as PU, are molded onto the shaft with insole.

The method according to the invention is advantageous over the prior art in that the entire production process is simplified and can be used in all types, for example Ago, Strobel, Moccasin, Flexible, California. In the case of Moccasins, which has no actual insole, in the present application, the corresponding lower (designed for sole construction) part of the upper part is included with the term "insole". The assembled shaft can be provided as a finished mounting unit.

For example, the shaft may be tweaked with the (Zwick) insole or slotted with the (strobel) insole. The insole may be provided as a flexible split insole and connected to the upper of the shaft by a double seam.

The components necessary for shoe ventilation are provided prior to joining the assembled shaft with the one-piece sole construction so as to allow the fully functional shoe to be made after the bonding process. In particular, the air pump device is provided so that it can be provided fully functional after the connection process.

Complicated intermediate steps, as required in the prior art by relatively complex sole constructions and air pumping devices, become superfluous in the method according to the invention.

In principle, the air pumping device may simply be in the form of a cavity corresponding to a recess in the one-piece sole construction, or it may be in the form of a lung. By a "lung" herein is meant a plastic device (plastic pump reservoir) separately formed as an entity independent of the sole structure, which sucks air or expels air when actuated by the walking motion of a user of the shoe made in accordance with the present invention Sole construction can be embedded. The use of only one formed cavity as the air pumping device simplifies the manufacturing process, reduces the manufacturing cost and can increase the reliability and life of the air pumping device. The use of a separately designed as an independent entity air pump device can improve the efficiency of air circulation.

It should be emphasized that in addition to the ventilation effect, the lungs also significantly increase walking comfort due to their shock-absorbing properties. This can in particular by the above-mentioned second valve regulates the air pressure so as to ensure a constant damping and prevent the heel part of the sole construction from being "punctured" under high mechanical pressure load.

If the bonding process is by injection molding of the one-piece sole construction and the air pumping means is formed as a lung, the second valve and the lung or lung may be secured, such as glued or welded, to the first and second valves prior to injection molding on the insole. This can be done in such a way that the air pump device and the second valve and possibly also the first valve are attached by means of a plastic layer on the underside of the insole. The second air duct is operatively connected to the air pump device via the second valve after the connection process. In particular, in the method according to the invention, by connecting the one-piece sole construction to the assembled shaft, the first air duct can be connected to the air pump device via the first valve.

If the connection process is carried out by injection molding of the one-piece sole construction (ie by direct soling) and the air pump device is designed as a lung connected to the insole, the air pump device is pressurized prior to injection molding by supplying a gas, in particular under a pressure according to a development of the method more than 70% or 80% of the pressure used in injection molding. The lung can be brought into its intended shape with compressed air of approx. 1.0 to 4.0 bar before injection molding. The Anspritzvorgang in a soling machine is carried out under a relatively high pressure. So that the air pump device can reliably withstand this pressure during the connection process, it can be pressurized accordingly.

When the bonding process is performed by bonding a previously fabricated one-piece sole construction to the insole with the insole and the air pumping device comprises a lung, the second valve may be provided on the insole or in one of the recesses of the sole structure prior to the bonding process. In this case, the lung may be provided in one of the recesses of the sole construction. When the bonding process is performed by bonding a previously fabricated one-piece sole construction to the insole with the insole, and the air pumping device is formed through a cavity corresponding to a recess in the sole construction, the second Valve be provided before the connection process to the insole or in one of the recesses. In both cases, the second air duct is operatively connected to the air pump device via the second valve after the connection process.

The first air duct, which serves to direct air into the air pump device, may comprise, for example, one or more ducts and / or hoses. The second air duct, which serves to direct air from the air pumping device into the interior of the shoe, may for example comprise one or more channels formed by one or more recesses in the sole construction and / or plastic tubes having openings along the longitudinal axis thereof and / or include a mesh fabric. Under a mesh fabric here is a textile or plastic insert with a net-like structure, for example, a so-called MATTRESS structure understood.

The air pumping device provided in the above-described methods may, during operation of the finished shoe, draw in air via the first air guide and the first valve from outside the sole construction and the shoe. According to a further development, the method further comprises attaching an air inlet device ("AirIntake") in the heel region or in a side region of the shaft and in connection with the first air duct or comprising it. For the mounted shaft, the air inlet device and also the first valve can be quilted prior to the connection process during shaft construction.

There is also provided a shoe obtainable by any of the methods described above. It is provided with such a manufactured shoe
a mounted shaft with perforated insole;
a one-piece sole construction connected to the assembled shaft having a sole body and one or more recesses in the sole body;
an air pumping device provided in one of the recesses;
a first air duct connected to the air pump means and extending partially within the shaft;
a second air duct connected to the air pump means and extending below the insole within one of the recesses;
a first valve associated with the at least one first air guide and configured to pass air only in the direction from outside the sole structure to the air pump device; and
a second valve associated with the at least one second air guide and adapted to pass air only in the direction away from the air pump means.

By relieving the sole structure during a walking movement of a user, air is drawn in through the first air duct from outside the shoe and above the upper sole part into the air pumping device, and the load on the sole structure during the user's walking motion causes air over the second air duct and the perforated insole ejected / pressed into the interior of the shoe while the pumping device is compressed by a pump volume corresponding to the amount of the ejected air.

The one-piece sole construction may consist of or include one of EVA, PU, PVC, TR, rubber or microcell and may be bonded directly to the assembled shaft, in particular without another midsole, by adhesive bonding or by injection molding. The sole construction may have on a (lower) outer tread in the region of the air pump device, in particular if this is provided in the heel area, a raised area (direction contacted by the tread base), for example, a raised portion on a heel. The pumping effect of the air pump device can be enhanced by the fact that the outer running surface (which in the course of a walking movement is in contact with the ground on which a user of the shoe according to the invention runs with the sole construction) has such an elevated area in the area of the air pumping device is designed to be pressed under load by the foot of a user in the direction of the air pump device. The raised area can not only contribute to efficient air circulation, but it can also be increased by the shock-absorbing function of the air pump device in combination with the increased range of ride comfort. These Air-sprung shock absorption enables healthier and more joint-friendly running.

The air pumping device may be formed by a cavity comprising one of the recesses or by a lung (see above). The second air guide may include one or more channels formed by one or more of the recesses and / or comprising one or more plastic tubes having openings along the longitudinal axis thereof and / or a mesh fabric.

According to a further development, the air pump device is provided in a heel region of the shoe, apertures in the jointed and ball area are provided in the perforated insole, through which air from the air pump device via the second air guide into the interior of the shoe is ejected, and is the insole as Mehrkomponentensohle formed, which is made in the heel area of a harder material than in the ball area.

The shoe may include a molded, glued or stitched heel portion that includes or forms an air inlet device and may include the first air duct. Alternatively, an air inlet device may be provided laterally in the shaft in connection with the first air duct. The molded heel part may comprise an outer and an inner heel part. Air is then drawn in from outside the shoe by the air pump device between the outer and the inner part of the molded-on heel part.

• Figuren 1a und 1b zeigen einen Schuh gemäß eine Ausführungsform mit einer einteiligen Sohlenkonstruktion, einer Luftpumpeinrichtung in Form eines Hohlraums und einer Lufteinlasseinrichtung, die seitlich im Schaft vorgesehen ist,
• Figur 2a und 2b zeigen einen Schuh gemäß eine Ausführungsform mit einer einteiligen Sohlenkonstruktion, einer Luftpumpeinrichtung in Form einer Lunge und einer Lufteinlasseinrichtung, die seitlich im Schaft vorgesehen ist,
• Figur 3a und 3b zeigen einen Schuh gemäß eine Ausführungsform mit einer einteiligen Sohlenkonstruktion, einer Luftpumpeinrichtung in Form eines Hohlraums und einer Lufteinlasseinrichtung, die in einem Fersenteil vorgesehen ist,
• Figur 4a und 4b zeigen einen Schuh gemäß eine Ausführungsform mit einer einteiligen Sohlenkonstruktion, einer Luftpumpeinrichtung in Form einer Lunge und einer Lufteinlasseinrichtung, die in einem Fersenteil vorgesehen ist.
• Figur 5 zeigt eine der in Figur 2a gezeigten Ausführungsform ähnliche Ausführungsform, wobei die Sohlenkonstruktion einen ausgeprägten Absatz aufweist.

Other characteristics and advantages of the invention will be apparent from the detailed but non-limiting description of embodiments shown with the aid of the attached drawings.

• FIGS. 1a and 1b show a shoe according to an embodiment with a one-piece sole construction, an air pump device in the form of a cavity and an air inlet device, which is provided laterally in the shaft,
• FIG. 2a and 2 B show a shoe according to an embodiment with a one-piece sole construction, an air pump device in the form of a lung and an air inlet device, which is provided laterally in the shaft,
• FIG. 3a and 3b show a shoe according to an embodiment with a one-piece sole construction, an air pump device in the form of a cavity and an air inlet device, which is provided in a heel part,
• FIG. 4a and 4b show a shoe according to an embodiment with a one-piece sole construction, an air pumping device in the form of a lung and an air inlet device, which is provided in a heel part.
• FIG. 5 shows one of the in FIG. 2a embodiment shown similar embodiment, wherein the sole structure has a pronounced heel.

In the present invention, a shoe having a one-piece sole construction directly connected to an insole with an insole is disclosed. The sole construction comprises a solid body without internal cavities, wherein one or more recesses are provided on the side facing the insole. These recesses, which can be directly injection molded by selecting a corresponding injection mold with the sole construction, can serve to receive / form an air pump device, to receive at least one valve and to receive / form an air duct, via which air is guided by the air pump device. The air thus guided can reach the inside of the shoe via openings in the insole, which is perforated, for example, in the region of the joint or the ball of the shoe, thus providing the desired ventilation. Said valve and said air guide may be positioned directly between the insole and the one-piece sole structure in one or more recesses thereof.

Hereinafter, embodiments of the shoe according to the invention and inventive manufacturing method for a shoe with respect to the FIGS. 1a to 4b and 5 described. Like or equivalent elements are identified by like reference numerals in the figures. In the FIGS. 1a . 2a . 3a , and 4a will the finished Shoe and in the Figures 1b . 2 B . 3b and 4b For example, a mounted shaft and a one-piece sole construction are shown prior to joining them.

As it is in the FIGS. 1a and 1b 2, a shoe according to an example of the present invention comprises a shaft 1 with an insole 2 connected thereto, for example via stitching or pinching, and a one-piece sole construction 3. The insole 2 is designed, for example, as a two-component sole and comprises a harder material in the heel region, for example one solid cardboard, as in the ball area, in which, for example, a textile material or leather can be provided. The relatively hard material provided in the heel region ensures that the foot of a user of the shoe does not sink into the air pump device 5. In addition, an insole with cardboard and steel joint, wherein the steel joint may be covered with Texon, a textile insole with paperboard reinforced area or a textile insole with reinforced cardboard and steel joint area can be provided. Such an insole may also be used in embodiments described below with reference to the following figures.

The one-piece sole construction 3 is cast as a solid body / monoblock and has no cavities inside. In the heel area it has a raised area 4. This raised area can be formed on a heel (ie in addition to this). The one-piece sole construction 3 has in the upper region (that is to say on the side facing the insole 2) one or more geometrically in principle arbitrarily shaped recesses.

In the heel region, an air pumping device 5 in the form of a cavity is formed in a recess of the one-piece sole construction 3. Upon relief of the heel area in the course of the walking movement of a user of the shoe, air is sucked into the air pump device 5 via an air inlet device 6, an air guide 7 connected thereto via a one-way valve 8. The air guide 7 can be guided through a corresponding opening in the insole 2. The air inlet device 6 may in particular be partially visible on the shaft of the shoe and in the form of a logo, pattern, trademark or the like. be formed or the like. The air guide 7 can run between an inner lining and an upper leather of the shaft 1 and be formed for example in the form of a plastic tube. she will passed through an opening in the insole 2 and connected to the valve 8 (see FIG. 1a ).

When the heel area is loaded, the air pump device 5 is compressed, as a result of which air is forced out of it via the one-way valve 9 into the air channels 10. While the one-way valve 8 only allows air to pass through in the direction of the air pump device 5, the valve 9 allows air to pass only from the air pump device 5. The air channels 10 form an air guide, is pressed through the air from the air pump device 5 and finally through the openings 11 of the insole 2 in the shoe interior. The compressed air through the openings 11 then serves to ventilate a shoe interior and thus the foot of a wearer of the shoe. Additionally or alternatively to the air ducts can here, as well as in the with respect to the FIGS. 2 to 4 described embodiments, plastic hoses with openings along their longitudinal axes, which are connected to the valve 9, or a mesh fabric are provided in a corresponding recess of the sole structure 3.

The Indian FIG. 1a Shoe shown can be made as follows. The perforated insole 2 is connected by stitching or pinching with the shaft 1. The air intake device ("AirIntake") 6 with the air guide 7 is mounted in the shaft 1. The valves 8 and 9 are attached (see FIG. 1 b) , The air guide 7 is connected through an opening in the insole 2 with the valve 8. The thus assembled shaft 1 with insole 2 can then be directly connected by gluing with a one-piece sole structure 3, which was injection-molded. As a result, a simple and inexpensive manufacturing process for the shoe is achieved.

In the FIGS. 2a and 2 B an alternative embodiment is shown which differs from that used in the FIGS. 1a and 1b is shown, characterized differs in that the air pump device 5 from the FIGS. 1a and 1b in the form of a lung (a separate Kunststoffpumpreservoirs) 15 is formed. When loading the heel area, the lung 15 is compressed, whereby air is forced out of this via the one-way valve 9 into the air channels 10.

The in FIG. 2a Shoe shown can be made as follows. The perforated insole 2 is connected by stitching or pinching with the shaft 1. The air intake device 6 with the air guide 7 is mounted in the shaft 1. The lungs 15 and the valves 8 and 9 are attached to the underside of the insole 2. This can be done, for example, such that these elements by means of a mounting position, such as plastic, are attached to the underside of the insole. The thus assembled shaft 1 with insole 2 and attached lung 15 is pulled on a last, centered in a soling machine and connected by injection molding with the one-piece sole construction 3 / soles. Thus, in an injection process, the shoe can be finished from the completely assembled shaft 1 with the lung 15 and the injection material of the sole construction 3 in a simple and cost-effective manner.

Alternatively, as it is in FIG. 2b 1, the one-piece sole structure 3 is first injection-molded, and the lung 15 is inserted in a recess of the injection-molded one-piece sole construction 3. Thereafter, the sole structure 3 with the lung 15 by bonding with the fully assembled shaft 1, on the underside of which the valves 8 and 9 may be located, which may alternatively be provided before joining in a corresponding recess of the sole structure 3, directly connected, whereby also a simple and inexpensive manufacturing process for the shoe is achieved.

In the FIGS. 3a and 3b another embodiment of the present invention is illustrated. In this embodiment, an air inlet device 6 is provided in the form of a heel part. The heel part may be molded or glued to the heel area of the shaft 1 and comprise an air-permeable element. By means of the heel part, a relatively large amount of air per step can be sucked in and provided for ventilating the inside of the shoe.

The air pump 5, which in the in FIG. 3a shown embodiment is provided by a cavity sucks air through the air inlet device 6 from the outside. The suction of the air is controlled by a one-way valve 8. The heel part may include air intake means 6 at one end of an air duct connected to the one-way valve 8 at the other end.

The in FIG. 3a Shoe shown can be made as follows. The perforated insole 2 is connected by stitching or pinching with the shaft 1. The heel part as an air inlet device is attached to the shaft 1, for example molded or sewn, so that it comprises the inner air guide. The valves 8 and 9 are also attached (see FIG. 3b ). The valve 8 can in principle be located inside or outside the heel part. The thus assembled shaft 1 with the insole 2 is connected directly to the one-piece sole construction 3, which is first injection-molded, by gluing, whereby a simple and inexpensive manufacturing process for the shoe is achieved. The valve 8 is connected to the extending in the heel part 6 air duct before gluing.

In the FIGS. 4a and 4b an alternative embodiment is shown which differs from that used in the FIGS. 3a and 3b is shown, characterized differs in that the air pump device 5 from the FIGS. 3a and 3b in the form of a lung (Kunststoffpumpreservoir) 15 is formed. In the illustrated embodiment, the lung 15 is connected via the valve 8 with a running within the heel part 6 air duct. Via the valve 9, it is connected to the air channels 10. As in regards to the FIGS. 2a and 2 B described embodiment, in the course of a walking movement of a user of the shoe on loading the heel area air is sucked into the lungs 15 from the outside through the air inlet device (the heel part in this embodiment) 6 and when relieving the heel area sucked in by the lung air through the valve 9, the air channels 10 and the openings 11 of the insole 2 in the shoe interior for the effective ventilation of the same expelled.

The in FIG. 4a Shoe shown can be made as follows. The perforated insole 2 is connected by stitching or pinching with the shaft 1. The heel part 6 is attached to the shaft 1, for example injection-molded, so that it comprises the inner air guide. The lungs 15 and the valves 8 and 9 are attached to the underside of the insole 2. This can be done, for example, such that these elements by means of a mounting position, such as plastic, are attached to the underside of the insole, so that the lung 15 is connected via the valve 8 with the air guide within the heel part 6in connection. The so fully assembled shaft 1 with insole 2 and attached heel part 6 and attached lung 15 is pulled on a last, centered in a soling machine and through Injection molding with the one-piece sole construction 3 connected / soles. Thus, in an injection process, the shoe can be finished from the completely assembled shaft 1 with the lung 15 and the injection material of the sole construction 3 in a simple and cost-effective manner.

Alternatively, as it is in FIG. 4b 1, the one-piece sole structure 3 is first injection-molded, and the lung 15 is inserted in a recess of the injection-molded one-piece sole construction 3. The valve 8 may be provided so as to protrude downwardly beyond the heel part. Thereafter, the sole structure 3 with the lung 15 by bonding with the fully assembled shaft 1, on the underside of which the valve 9 may be located, which may alternatively be provided before joining in a corresponding recess of the sole structure 3, directly connected, which also a simple and inexpensive manufacturing process for the shoe is achieved. The valves 8 and 9 are in this case connected to the lung 15.

The in the FIGS. 1a to 4b illustrated embodiment can be realized with a one-piece sole construction comprising a (wedge) flat sole. Alternatively, the sole construction in these embodiments may have a pronounced heel. Exemplary is the in FIG. 1a embodiment shown modified by a pronounced paragraph 14 in the FIG. 5 shown. The heel 14 of the sole construction 3 additionally has a raised area 4. Furthermore, a recess in the region of the shoulder for receiving the lung 15 is provided. Of course, other sole profiles can be used.

In the above with respect to the FIGS. 1a to 4b and 5 described embodiments, the one-piece sole structure 3 can be injected from EVA (ethylene vinyl acetate). This material has a relatively low abrasion value and high elasticity at jump, so it is suitable for the described embodiments. Alternatively, a PU (polyurethane) material or polyvinyl chloride (PVC) can be used. Furthermore, the sole construction comprises a solid body with recesses, in particular on the upper (the insole facing) surface. The solid body can also have recesses on the lower side (on the running surface) in which plastic elements / rubber inserts can be used to profile the tread.

As described above, the assembled shaft can be pulled over a last and centered in a stocking machine and bonded / molded to the one-piece sole structure by injection molding. This injection molding process can be carried out at a pressure in a range of 1.0 to 4.0 bar. Through the last, which has a rubbery cover, the openings in the perforated insole are covered airtight. It may be advantageous to pressurize the lungs prior to molding of the one-piece sole structure to better withstand the molding process. The pressure under which the lung is placed may be about 70% or 80% of the injection pressure.

Although the present invention has been described with reference to specific embodiments, it should be understood that the embodiments are merely illustrative and not limiting of the scope of the invention. The method steps described can be carried out in any suitable order. Any variations, modifications and additions and improvements to the described embodiments are possible. These variations, modifications, additions and improvements are within the scope of the invention as set forth in the following claims.

Claims (15)

Method of making a shoe, with the steps
Providing a mounted shaft with a perforated insole;
Providing a one-piece sole structure having a sole body and one or more recesses in the sole body;
Providing an air pumping device;
Providing a first air duct extending at least partially within the shaft and configured to supply air to the air pump means;
Providing a second air duct adapted to exhaust air from the air pump means;
Providing a first valve associated with the first air guide and configured to communicate air only in the direction from outside the sole structure to the air pumping device;
Providing a second valve associated with the second air guide and configured to pass air only in the direction away from the air pump device; and
Connecting the one-piece sole structure to the assembled shaft such that the air pumping device, the second air guide, and the second valve are positioned between the insole and the one-piece sole structure in the one or more recesses. A method according to claim 1, in which the one-piece sole construction is connected to the assembled shaft by injection, and in particular consists of polyurethane. The method of claim 2, wherein the air pumping means comprises a lung and the second valve and the lung are secured to the insole prior to injection. A method according to claim 2 or 3, in which the air pump device is pressurized prior to injection by supplying a gas, in particular under a pressure of more than 70%, in particular 80%, of the pressure used during injection molding. The method of claim 1, wherein the one-piece sole construction is adhesively bonded to the assembled shaft. Method according to claim 5, in which a) the air pump means comprises a lung and the second valve is provided prior to bonding to the insole or in one of the recesses;
or b) the air pump device is formed by a cavity corresponding to a recess in the sole construction and the second valve is provided prior to bonding to the insole or in one of the recesses. Method according to one of the preceding claims, in which by connecting the one-piece sole construction with the mounted shaft, the first air duct is connected to the air pump device via the first valve. Method according to one of the preceding claims, in which the second air duct comprises one or more channels formed by one or more recesses in the sole construction and / or plastic tubes with openings along the longitudinal axis thereof and / or a mesh fabric. A method according to any one of the preceding claims, further comprising attaching an air inlet means in the heel region or in a side region of the stem and in communication with the first air guide. Shoe obtainable by a method according to any one of the preceding claims. Shoe according to claim 10, with
a mounted shaft with perforated insole;
a one-piece sole construction connected to the assembled shaft having a sole body and one or more recesses in the sole body;
an air pumping device provided in one of the recesses;
a first air duct connected to the air pump means and extending partially within the shaft;
a second air duct connected to the air pump means and extending below the insole within one of the recesses;
a first valve associated with the at least one first air guide and configured to pass air only in the direction from outside the sole structure to the air pump device; and
a second valve associated with the at least one second air guide and adapted to pass air only in the direction away from the air pump means. Shoe according to claim 11, in which the one-piece sole construction is connected directly to the mounted shaft, in particular without further midsole, adhesively or injection-molded, and in particular has an outer running surface which has a raised area in the area of the air pumping device. Shoe according to claim 11 or 12, in which the air pump device is formed by a cavity comprising one of the recesses or by a lung and / or provided in a heel region of the shoe, in which insole openings are provided in the articulation region, through which air from the air pump means via the second air guide into the interior of the shoe is ejected, and the insole is formed in the heel area of a harder material than in the joint area. Shoe according to one of claims 11, 12 and 13, in which the second air guide comprises one or more channels formed by one or more of the recesses and / or one or more plastic tubes with openings along the longitudinal axis thereof and / or a mesh Fabric includes. Shoe according to one of claims 11 to 14, with a molded-on heel part, which comprises an air inlet device and the first air duct.

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