Abstract: An outer sole for footware, having a rounded outer circumference and a plurality of concentric separate zones that are separated from one another by lanes which are incised into the sole. The lanes are incised from one side only and the side of the sole opposite that one side is covered with an adhesive layer for adhesion to the underside of footwear. The adhesive layer is covered by a protective foil adapted to be peeled off before the sole is applied to footwear.

Abstract: A covering sole for footwear comprises a comparatively wear-resistant disc-shaped body (1) which has at least substantially the same shape as a walking surface of footwear to be covered thereby. Before the covering sole is provided, it should first be adapted to the size of the walking surface. The body for this purpose comprises a number of separate zones (31, 32, 33) which are mutually separated by lanes (2) which run parallel to the circumference and along which the body has been intentionally weakened so as to render possible a manual separation of at least one zone (31, 32) lying farther to the outside from a zone (32, 33) lying inside the former zone.

Abstract: A device for shortening translucent double-walled plate material (20) which shortens the plate material with a substantially rectilinear cut. The plate material comprises two basically parallel synthetic plates (21, 22) which are separated from each other at a basically constant distance by a number of parallel dividing walls, enclosing a number of elongated channels (24). To avoid too much pressure on the plate material, when it is shortened, and to avoid too large an amount of chips and too much electrostatic charging of the plate material the device comprises two rotating knives (4, 5) to work into the plate material (20) from both sides. The rotating knives in accordance with the invention, have been placed slantwise behind each other and their combined penetration equals at least the thickness of the plate material (20) ensuring a complete cut through the plate material.