Abstract: The invention relates to a method for machining the running surfaces (9) of winter sports appliances such as skis or snowboards, in which a blank track (20) is subjected to a machining process in order to obtain a predetermined surface microstructure which improves the gliding ability. A precisely defined and reproducible surface structure of the track is achieved in such a way that the machining process for producing the surface microstructure comprises a plastic deformation by a tool (5, 5a) which is moved over a running surface (9) of the track blank (20) and is pressed with a predetermined force on the track blank (20) in order to deform the same in a plastic manner. The invention further relates to a winter sports appliance which is produced with such a method and an apparatus for performing the method.

Abstract: The invention relates to a method for machining the running surfaces (9) of winter sports appliances such as skis or snowboards, in which a blank track (20) is subjected to a machining process in order to obtain a predetermined surface microstructure which improves the gliding ability. A precisely defined and reproducible surface structure of the track is achieved in such a way that the machining process for producing the surface microstructure comprises a plastic deformation by a tool (5, 5a) which is moved over a running surface (9) of the track blank (20) and is pressed with a predetermined force on the track blank (20) in order to deform the same in a plastic manner. The invention further relates to a winter sports appliance which is produced with such a method and an apparatus for performing the method.

Abstract: A continuous process is disclosed for producing a strip of decorated ski coating material from ultra-high molecular weight polyethylene. A 0.5 to 1.5 mm thick strip of ski coating material produced in a screw-type or piston-type extruding machine or by sintering followed by peeling and printed with thermodiffusion dyes continuously runs through a heating zone in which it is uniformly heated up to a temperature above 140.degree. C., so that the crystalline structure of the ultra-high molecular weight polyethylene is partially decomposed and the thermodiffusion dye diffuses into the molten ski coating material without the need for an intermediate carrier.

Abstract: The invention concerns a process for manufacturing a strip of ski-coating material made of polyethylene of ultra high molecular weight, wherein a ski-coating strip material 4 manufactured to a thickness of 0.5 to 1.5 mm by a screw extruder, a ram extruder or press sintering with subsequent peeling is made to pass continuously first through a heating zone 1 in which it is heated to temperature above 140.degree. C. and then through a cooling zone consisting of two sizing plates 2, 2' in which it is cooled to a temperature equal to or lower than ambient. This process produces a ski coating of which the crystalline proportion can be adjusted within a range of 25 and 60%, as a result of which improved gliding by the ski coating on snow and improved wax acceptance is assured in comparison with the known methods.

Abstract: The invention concerns a polyethylene-based ski coating containing up to 5%-wt of a fluorinated additive. This ski coating is especially suitable for making downhill and cross-country skis.

Abstract: A method for conditioning a racquet string which is tensioned to an elongation between 5 and 15% and in this state is wound on a spool. To implement this process, an untreated string segment is drawn off a supply drum and the end of the untreated string segment is affixed to the periphery of the spool. Thereupon the spool is moved away from the supply drum such that a specified winding length corresponding to the untreated string segment is tensioned to produce a predetermined elongation. While the tension is maintained, the elongated string segment, with simultaneous motion of the spool toward the supply drum, is then wound on the supply spool and lastly the second end of this string segment is affixed to the periphery of the spool.

Abstract: The method relates to the production of a string (24) for a racket, particularly a tennis racket. The string is a known string, for example a gut string or a synthetic string. The conditioning of the string on a support (1), particularly a bobbin, is effected under a traction tension and the length of the string is kept constant. Thus, the elongation of the string under the traction tension effect when winding the string on the support (1) is conveniently between 5 and 15%. The stringing of the racket with the thus conditioned string (24) should be carried out in an interval of 60 minutes, but preferably 30 minutes, from the removal time of the string from its support (1). The relaxation of the string, i.e. the decrease of tension after the stringing of the racket, is considerably smaller with a string conditioned according to the invention than with a same string which has not been conditioned. Such relaxation reduction is particularly important with a polypropylene string.