Boot and shoe making – Processes – Moccasins
Patent
1991-05-22
1994-02-15
Meyers, Steven N.
Boot and shoe making
Processes
Moccasins
36 14, 36 12, 12142T, A43C 1308
Patent
active
052855465
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a shoe with an upper, an insole connected to the upper, a sole construction connected to the upper and a substantially waterproof lining, the upper which consists of a material of relatively high water-conductivity having connected to it a marginal strip of a material of lesser or no water conductivity which is connected to the insole and which through the interposition of a sealing-tight compound bears on the waterproof lining in a waterproof fashion, the sole structure having at least one per se watertight layer which is connected in watertight manner to the outside of the marginal strip.
Modern lining materials such as are commercially available for example under the trade mark Goretex(.RTM.), provide for the waterproof lining of shoes without impeding their permeability to vapour. Basically, two systems are known. In the case of a first system, a complete sock is inserted or rigidly incorporated into the shoe. In the case of a further system, only the upper part of the shoe is lined and watertightness is completed by connecting the lining to a sealing structure in the sole zone. The present invention is concerned with the latter-mentioned system.
It is known from German Patent Specification No. 37 12 901 for the lining material to be continued on the underside of the insole beyond the welt of the upper and to be embedded there into a waterproof coating which is sprayed onto the underside of the insole so forming a sealing-tight continuation of the lining in the sole area.
In the case of a first construction according to this Patent Specification, the upper is formed from a laminate comprising an outer layer, a vapour-permeable membrane as a middle layer and an inner layer. On the inside of the inner layer there may possibly be a lining material. The laminate engages under the insole. In the marginal area of the insole, the laminate is, via its inner layer, rigidly lasted on the insole by the AGO method. A projecting area of the laminate is disposed underneath the insole where it is embedded into a sealing material which is sprayed onto the underside of the insole. This construction is only suitable for producing special shoes in which the upper material, the waterproof membrane and the inner material form one laminate. The connection between the upper material and the insole is established by means of the waterproof membrane and the inner layer so that all the mechanical tensile loadings during production and in operation have to be transmitted through the layered construction of the laminate.
In the case of another construction according to this Patent Specification, leather can be used as the material for the upper. The waterproof lining in this case projects below the edge of the leather and underneath the insole into a sealing-tight material which is again injection moulded onto the underside of the insole. What is not clear in this case is how the mechanical connection is to be established between the insole and the upper material. Again, if one is referring to a laminate joint between the upper material and the waterproof lining, then once again the problem arises that all the tensile forces occurring in the upper material, regardless of whether they are caused during lasting or during use can only be transmitted through the layered bonding between the insole and the upper material. injection moulded onto the underside of the insole. What is not clear in this case is how the mechanical connection is to be established between the insole and the upper material. Again, if one is referring to a laminate joint between the upper material and the waterproof lining, then once again the problem arises that all the tensile forces occurring in the upper material, regardless of whether they are caused during lasting or during use can only be transmitted through the layered bonding between the insole and the upper material.
German Utility Model Specification No. 87 17 201 discloses a shoe in which the upper material is sewn to a marginal strip close to the
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LOWA-Schuhfabrik Lorenz Wagner GmbH & Co. KG
Meyers Steven N.
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