Boots – shoes – and leggings – Sole-attaching means
Patent
1997-11-21
1999-08-03
Patterson, M. D.
Boots, shoes, and leggings
Sole-attaching means
36 14, 36 55, 12142T, 12142RS, A43B 1328, A43B 1308
Patent
active
059309172
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a shoe structure, which is at least part of a shoe and comprising: an upper, comprising at least one outer layer and a lining, which lines the inside of the outer layer and includes a waterproof and water-vapor permeable layer; an insole connected to the lower end area of the outer layer; and a sole.
Shoes which have a shoe structure with a lining that includes a waterproof and water-vapor permeable functional layer, are well known for their wearing comfort. It is, however, often difficult to guarantee waterproofing in this kind of shoe because, for example, every seam which is sewn into the lining can transport water to the inside of the shoe by capillary action. For this reason, the lining that includes a waterproof, water-vapor permeable functional layer is often constructed in the shape of a sock (better known as a booty), which is only connected to the outer layer at the upper opening of the shoe. In this case, the seams or other types of connection required for formation of the sock can be easily sealed with a waterproof adhesive tape, so that the sock design of the lining guarantees that the shoe is waterproof. However, using the sock design dictates that there must also be lining in the area of the sole, in order to seal the inner area hermetically against water, despite the fact that it is often unimportant whether or not the lining is water-vapor permeable in the sole area, because the sole material itself is not water-vapor permeable. For this reason, the expense involved in constructing the lining in the form of a sock (booty) is often too high for many purposes.
For this reason, a method has been used, for example in accordance with DE-A-38 21 602, in which a porous strip is inserted in shoes with an injection-molded sole, in order to connect the outer layer and the lining. During the injection moulding process, the material of the sole penetrates this porous strip right through to the lining, so that the seam which joins the porous strip to the lining is surrounded by the sole material. This embodiment cannot be used for certain types of shoe, for example shoes with a flex design. In shoes with flex construction, the lower area of the outer layer is turned back to the outside of the shoe so that this lower end area of the outer layer is at least approximately parallel to the outsole and sewn to the insole. In this case, the extreme edge of the turned-back end area of the outer layer and the extreme edge of the sole have the same contour. In order to guarantee that the shoe is waterproof, these types of shoe are still made using the more expensive "sock" construction method.
SUMMARY OF THE INVENTION
The object of the present invention is to construct a shoe structure of the kind mentioned earlier in such a manner that its production is less expensive, or at least to use as little as possible of the expensive lining which includes a waterproof and water-vapor permeable layer in the areas where water-vapor permeability is not required. Most particularly, the shoe structure should be suitable for manufacturing shoes with a flex construction.
The solution to these problems is a shoe structure in accordance with the introducing part of claim 1, as follows: the lower end area of the lining is turned back to the inside in the sole area at least approximately parallel to the direction in which the sole extends, whereby the area of the lining which is turned back is shortened to a width of between 0.5 and 3 cm; at least cut-outs are made in the insole, at least in the area in which the turned back, lower, end area of the lining ends; the lower end area of the lining is embedded in a synthetic material, which fills the cut-outs in the insole, in such a manner that at least the surface of the end area of the lining facing the inner area of the shoe structure forms a continuous surface with the surface of the synthetic material facing the inner area of the shoe structure, and the functional layer is bonded with the synthetic material in a waterproof
REFERENCES:
patent: 1206749 (1916-11-01), Burnham
patent: 1243421 (1917-10-01), Kelly
patent: 2460669 (1949-02-01), Ayers
patent: 2651118 (1953-09-01), Root
patent: 3216033 (1965-11-01), Nadler
patent: 4120104 (1978-10-01), Lasmo
patent: 5628127 (1997-05-01), Notzold
patent: 5732479 (1998-03-01), Pavelescu
Derwent Abstract 90-291461 (English language Abstract of DE 40 07 962 A1).
Derwent Abstract 96-021392 (English language Abstract of DE 44 19 802 A1).
Haderlein Manfred Gunter
Pavelescu Liviu-Mihai
Akzo Nobel nv
Patterson M. D.
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