Patent ID: 6114009
Filing Date: 2000-09-05
Classification: B29D,B32B,G02B,Y10T

Abstract:
A lamina suitable for use in a mold for use in forming retroreflective cube corner articles, the lamina having opposing first and second major surfaces defining therebetween a first reference plane, the lamina further including a working surface connecting the first and second major surfaces, the working surface defining a second reference plane substantially parallel to the working surface and perpendicular to the first reference plane and a third reference plane perpendicular to the first reference plane and the second reference plane, comprising:a plurality of adjacent geometric structures formed in the working surface, each geometric structure comprising three faces arranged as a cube corner element and at least one additional face;a groove set including a plurality of parallel grooves in the working surface of the lamina, each such groove having one of the three faces of one geometric structure and the at least one additional face of an adjacent geometric structure as groove side surfaces.