Patent ID: 6105492
Filing Date: 2000-08-22
Classification: B31F

Abstract:
A process for forming a matrix cavity within an embossing device for a paper processing machine, the machine having two rotatingly driven embossing rolls oppositely arranged in a conveying line for paper products, comprising the steps of:reducing the spacing between the embossing rolls by simultaneously rotating the embossing rolls so that a hard embossing punch comprising a top die having a raised embossing pattern supported on one embossing roll penetrates the surface of a counter die;said counter die made of elastic thermoplastic material of high molecular weight polyethylene with a very high degree of polymerization and having an elastic surface supported on the other embossing roll; andheating at least one of the embossing punch and counter die until the surface of the counter die is in a plastic state and continuing the heating as the embossing rolls rotate,wherein a permanent negative copy of the embossing pattern is embossed as a matrix cavity in the counter die by the embossing punch.