Patent ID: 7198743
Filing Date: 2007-04-03
Classification: A44B,B29C,B29L

Abstract:
1. A process for producing an adhesive closing part with laterally symmetrical interlocking structures integrally connected to a backing, each interlocking structure having a stem part, a head part at one end of the stem part, and a base part at an opposite end of the stem part connecting the stem part to the backing, the process comprising the steps of: supplying moldable material to a shaping zone between a pressure tool and a molding tool; driving the pressure tool and the molding tool to form the backing in the shaping zone and conveying the backing in a transport direction; and molding the moldable material in mold cavities in the molding tool, each of the mold cavities having boundary walls opposite one another extending in a lengthwise direction of the mold cavity continuously along a convex path, each convex path having a curvature in a form of a hyperboloid with a more pronounced portion defined by decreased radii of curvature and by narrowing of spaces between the boundary walls, each more pronounced portion being closer to a head molding part of the cavity than to a base molding part of the cavity, each cavity being rotationally symmetrical to form rotationally symmetrical interlocking structures.