Patent ID: 6287665
Filing Date: 2001-09-11
Classification: A44B,B29C,B29L,Y10T

Abstract:
A method for manufacturing a hook-and-pile fastening element having a plurality of interlocking elements formed integrally with a backing, comprising the steps of:introducing thermoplastic in a plastic or liquid state into a gap between a pressure roller and a shaping roller, while rotating the pressure roller and the shaping roller in opposite directions, the shaping roller having a screen with outward and inward electroplated, etched or laser formed cylindrical openings;forming the backing in the gap between the rollers;hardening the thermoplastic, at least to some extent, in the openings in the screen of the shaping roller to form finished interlocking elements having stalks with enlarged areas configured as mushroom heads extending radially from the stalks exclusively from the hardening of the thermoplastic in the openings; andforming concave indentations on the mushroom heads.