Abstract: A process which serves to seal and waterproof the outsole-side end area of a waterproof shoe shaft and/or to pad the outsole-side end of a shoe by putting a liquid, curable, filling material into the space between the insole and outsole is described. The outsole is provided with an input opening for putting in the filling material. The outsole is adhered to the shaft only in a circumferential area and in such a way that the outsole-side end area of the shaft remains unadhered. The liquid filling material is put in through the input opening, between the insole and the outsole, from where it flows into the outsole-side end area of the shaft due to its good flowability. The liquid material contains polyurethane precursor ingredients which react to form a foam polyurethane.

Abstract: In a safety shoe provided with a toecap, a vamp, an insole, and a two-layer structure sole, the a two-layer structure sole includes an outsole part comprising a high hardness rubber material and a midsole part, laminated in the above outsole part, comprising a low hardness sponge rubber material and has a heel part. The outsole part is fused integrally with the midsole part by vulcanization molding, and the upper circumferential edge of the outsole part is fused integrally with the lower circumferential edge of the vamp by the vulcanization molding described above. Since the outsole part in a side in contact with the ground has a high physical strength and is excellent in an oil resistance, a chemical resistance and a heat resistance, and the midsole part in an inner side has a cushioning property, the shoe is less liable to bring about fatigue even after wearing it for a long period of time.

Abstract: An article of footwear comprising relatively elastic and relatively inelastic materials chemically bonded together is disclosed. In one embodiment, the relatively elastic and relatively inelastic materials are arranged in such a fashion to impart flexibility to the article of footwear. In particular, plastic and rubber materials are bonded together to improve the flexibility of an outsole of an article of footwear. The invention also is directed to the fabrication of new or improved devices and elements for use in articles of footwear and their associated methods of construction such as closure mechanisms comprising relatively elastic straps bonded to relatively inelastic anchor portions and vice versa, articulating inelastic and elastic exoskeleton constructions useful in skates and ski boots, and elastic or inelastic eyelets surrounded by inelastic or elastic materials.

Abstract: A method of making a shoe having a midsole, an upper, and an outsole. The method comprises providing a shoe midsole having a cavity in an underside thereof. The cavity is filled with a fluid which is curable to an elastomeric solid condition, and the fluid is allowed to cure to such solid condition. An outsole is secured to the underside of the midsole so that the outsole underlies the cavity, and an upper is secured to the midsole.

Abstract: An article of footwear comprising relatively elastic and relatively inelastic materials chemically bonded together is disclosed. In one embodiment, the relatively elastic and relatively inelastic materials are arranged in such a fashion to impart flexibility to the article of footwear. In particular, plastic and rubber materials are bonded together to improve the flexibility of an outsole of an article of footwear. The invention also is directed to the fabrication of new or improved devices and elements for use in articles of footwear and their associated methods of construction such as closure mechanisms comprising relatively elastic straps bonded to relatively inelastic anchor portions and vice versa, articulating inelastic and elastic exoskeleton constructions useful in skates and ski boots, and elastic or inelastic eyelets surrounded by inelastic or elastic materials.

Abstract: A method for forming a pattern on a shoe sole includes preparing a film having a pattern attaching and transferring to an EVA material. The EVA material is then molded so as to allow infiltrating of the pattern in the EVA material and so as to form a shoe sole. The pattern is solidly formed on the outer peripheral surface of the shoe sole and will not be easily worn out. The shoe sole includes a cavity formed in the bottom portion for receiving an insert. The insert may be made of waste or recycled EVA materials.

Abstract: A method for forming a composite sole to an upper of a shoe includes molding a blank midsole to an upper of a shoe while protecting the material of the upper from the heat involved in molding the midsole to the upper, and subsequently adhering an outsole having a desired traction surface to the blank midsole. The method requires less heat and less time than prior art vulcanization processes that form entire soles to footwear uppers, and also requires less equipment than prior art processes.

Abstract: The method for manufacturing shoe soles consists in cutting by half a tire and separating its flancs, reducing the interior portion of said flancs down to the cotton weaving, smoothing both faces of said flancs in order to homogenize the surface and to obtain an appropriate average thickness, punching the sole with its definitive form and fixing said form in a press. The shoe is fabricated by pressing a leather sole in a microporous inner sole, adhering said elements to each other by application of pressure, sewing to said elements the shoe upper, adhering a steel reinforcement to the microporous inner sole, adhering a microporous wedge to a tire outer sole by application of temperature and pressure, assembling together by sizing the leather upper, the leather sole, the microporous inner sole and the steel reinforcement with the assembly formed by the wedge and the tire outer sole, and trimming the contour of the outer sole. The invention applies to the fabrication of leisure and sport shoes.

Abstract: A process of molding multi-durometer footwear soles which includes forming elongated components from compression moldable compounds, each component having a different hardness (Shore A). The components are configured and dimensioned such that the softer component will be positioned on top of and within the configuration of the bottom, harder component. The assembled components are placed in a compression mold and covulcanized together.

Abstract: A method of making EVA shoe midsole includes a compound containing in percentage by weight the substancessuch as 100% of ethylene vinyl acetate (EVA) into which 5-40% of filling agent, 1-10% of foaming agent, 0.5-3% of bridging agent, 0.5-5% of finishing aid, 0.1-1% of foaming aid and coloring agent are added. Such compound is made into particles to be injected into the primary mold in which the preliminary blank of midsole is formed. The preliminary blank is made to foam to take shape of a molded blank under heat and pressure so as to ensure that the size of the molded blank corresponds to that of the midsole intended to be made. The molded blank is then treated in the secondary mold under heat and pressure and is subsequently cooled to take form of the midsole intended to be manufactured.

Abstract: Footwear with an improved arch support including an exposed gripping surface through a window in the outer sole is presented. The arch support includes a heel flange and brace which stabilizes the support between the inner and outer soles and the serrated gripping surface provides the wearer with needed traction for activities such as climbing ladders, horseback riding or the like.

Abstract: A shoe sole lamination and method of lamination in which shoe sole portions composed of selected materials and low melting plastic inserts are laminated and then heat embossed. The method includes use of insulating inserts placed strategically in the mold to protect the plastic inserts against the heat and temperatures of embossing.

Abstract: A method for manufacturing an air-pervious insole being uneasily deformable is provided. The method includes (1) preparing from a foaming material an elastic base piece having through holes, (2) cutting from the base piece a layer of the foamed material to present a rough surface, (3) adhering a cloth layer on the rough surface, then (4) baking to soften the base piece, then (5) molding in a cooling mold, and finally cutting the cooled and molded piece to obtain an air-pervious insole.

Abstract: Rubber articles subjected to ozone while under dynamic flexing conditions are protected using a novel triazine class of materials, specifically tris-(N-alkyl-p-phenylenediamino)-1,3,5-triazines. Belts, hose, air springs, roofing membranes, etc. are preferred articles of the invention.

Abstract: The process of molding a component of a sole unit for an athletic shoe comprising the steps of supporting a core of a first plastic material in a cavity of a mold, the core defining an integral part of the component and extending within a heel region toward a forefoot region, supporting at least one rigid plug member within the cavity juxtaposed and in partially surrounding relation to the core, injecting a second plastic material into the cavity to fill the cavity, to form a shell around the core, at least partially curing the injected plastic material, removing the plug member, and injecting a third plastic material which upon curing forms a second resilient plastic material having a hardness (Shore A) greater than that of the material of the core into the cavity to fill the area heretofore occupied by the plug member, the plug member being shaped such that the third plastic material forms a set of posts.

Abstract: A shoe-innersole material for use in providing cushioning and support in footwear, and a method of manufacturing the shoe-innersole material, the shoe innersole comprising a heel and an arch section composed of a molded, elastomeric polyurethane foam material of low compression set, the heel and arch sections directly bonded in the molding process to a full-sole material composed either of foam or a solid, flexible sheet material.

Abstract: According to the process of the invention one starts with a block of wood of approximately parallelepipedal shape from which, by means of operations of milling and turning, there are obtained opposed surfaces on which there are subsequently milled parallel channels extending through almost one-half of the thickness of the block. Into the channels there is introduced resilient rubber so as then to obtain a pair of perfectly symmetrical insoles, by making a longitudinal cut along the plane corresponding to one-half the thickness of the block. The insoles being made perfectly resilient by transverse layers of rubber which furthermore have anti-slip properties.

Abstract: A shoe-innersole material for use in providing cushioning and support in footwear, and a method of manufacturing the shoe-innersole material, the shoe innersole comprising a heel and an arch section composed of a molded, elastomeric polyurethane foam material of low compression set, the heel and arch sections directly bonded in the molding process to a full-sole material composed either of foam or a solid, flexible sheet material.

Abstract: An article of footwear is made by partially forming the article so as to comprise at least an upper (11) lasted to a first insole (12), arranging the partially formed article to fully expose the upper (or inner) surface of the first insole, preferably by turning the partially formed article inside out, and moulding a shock absorbing or resilient second insole (15) of elastomeric, preferably visco-elastic, material onto the exposed surface of the lasting insole. An outsole (13) is applied to the article at some stage, preferably before the second insole is moulded in.

Abstract: A process and configuration for constructing the lower part of a spikeless type athletic shoe having molded studs on its undersurface to improve its wear-resistance is disclosed wherein portions of the sole and heel are premolded of an extra-durable material, such as high carbon content rubber, and then disposed partly cured in the shoe master mold at selected locations for molding and curing with the remainder of the sole and heel to produce a lower construction of conventional rubber molded with underface portions of extra-durability at the selected areas of greatest wear.

Abstract: The manufacture of a sole unit for footwear, such as an athletic shoe including an integral midsole/wedge or a separable wedge for use with a midsole. The integral midsole/wedge unit and the separable wedge comprise a shell and a core at least partially encapsulated within the shell. In the manufacture the core is supported in a mold by a plurality of pins extending from an upper and lower mold half toward a parting line; or the core is supported on one or the other of an outsole or insole of the sole unit and closed in the mold. The material of the shell is poured or injected into the mold.

Abstract: The invention concerns a composite sole for use in safety footwear, as well as a combination heel and sole and a complete article of footwear, the composite sole comprising an inner sole of electrically conducting material, and a thin flexible outer sole up to about 8 mm thick of electrically conducting material, said outer sole being spaced from the inner sole and connected thereto at a plurality of positions in an electrically conducting manner. Electrically conducting plastics spacer plugs can be used as the connection between the inner and outer soles.

Abstract: A shoe buildup and a method for making the same wherein a block of rigid foam material is cut and shaped to follow the contour of an existing shoe and is then preferably adhesively secured to the sole of the shoe. Although the buildup may be formed of one piece, it is generally formed in two parts, one for the front portion of the shoe and one for the heel portion thereof. After the buildups have been attached, a ground engaging second sole and a heel are nailed to the bottoms of the buildups. Side coverings of leather or other appropriate material may be adhesively secured to the front and rear buildups to provide a finished shoe having an attractive appearance.

Abstract: An improved method for making soles provided with high heel, for women shoes, in a single piece, is described which consists of injection molding thermoplastics materials in a mould formed by several complementary portions defining therebetween the cavity of the sole heel. Prior to the injection molding, a sheet material for laterally and rearwardly covering the heel and a stiffening core or rigid structure are inserted. The rigid structure is provided with a downwardly vertical direction concavely curved front wall and, at its front face, with two continuous side fins projecting for a length equal to the thickness of the covering sheet material and, at its base with slots and at least two blind holes effective to fix the heel top-piece. The rigid structure is provided, at its upper surface, with a hole which as it is filled up by the plastics material, contributes to improve the anchoring of the rigid structure to the sole.

Abstract: An anvil for supporting an outsole based upon an elastomeric compound, the outsole having a heel portion of greater thickness than the sole portion, during a process of imparting a multiplicity of slits to the outer surface of the heel and sole portions of said outsole. The anvil has a sole portion extending to a greater height than the heel portion of the anvil, whereby the multiplicity of slits may be imparted to the heel and sole portions of the outsole by a single reciprocating cutting blade in one continuous operation without removing the outsole from the anvil or changing the position of the outsole on the anvil. A method of imparting the multiplicity of slits to the outsole is also provided.