Abstract: An insole structure having an outer contour corresponding to the shape of the sole of the foot has outer layers between which are located inner layers. The outer layers are made from a wear resistant material such as beechwood, and the inner layers are made from a lighter material such as poplar. The separately cut layers are glued together and shaped to form an anatomically contoured, substantially rigid structure.
Abstract: A tread substrate or shoe sole for sandals, mules and other footwear includes a plurality of interconnected modular elements which can be joined together. The elements can be made from the same material or plural materials bonded together. The elements are substantially cylindrical and can have different diameters in a single sole structure. Additionally, the elements can be hollow cylindrical bodies and can have differing wall thicknesses and polygonal cross-sections.
Abstract: A process for forming a strong, pressure-tight joint between fabric substrates includes coating each substrate with polyurethane on one side, superimposing the fabric substrates so that the polyurethane layers are together, welding elongated regions of the polyurethane together under heat and pressure and sewing through the weld. The edge is then folded over and bonded to itself and the material is spread out. The resulting material can be bonded to a sole to form a waterproof, lightweight boot.
Abstract: The cross country skiing boot fitting into a device carrying a plate (8) with preferably one, two or more parallel longitudinal ribs (9) has corresponding parallel depressions (10) in the sole (5). These ribs engage in the depressions and provide lateral guidance for the long distance skiing boot, specifically during descents. The relative movement of the boot (3) with respect to the ski (1) is not impeded during cross country skiing, neither special engagement nor disengagement being unnecessary.
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