Patent ID: 6644818
Filing Date: 2003-11-11
Classification: B29D,Y10S

Abstract:
A process for producing a prismatic reflective material in which no join lines or seam lines are apparent, comprising the steps of:providing at least one mold having prismatic elements therein for making a prismatic retro-reflector with the at least one mold in a thermoplastic substrate; abutting edges of the at least one mold to form a mold structure wherein the abutting edges of the mold form a seam line; forming a retro-reflective thermoplastic sheet with the at least one mold wherein the retro-reflective sheet has a seam line corresponding to the seam line formed by the edges of the at least one mold; and forming a grid pattern on or in the retro-reflective thermoplastic sheet, which grid pattern is positioned such that the seam line in the retro-reflective thermoplastic sheet becomes a part of the grid pattern to be effectively obscured thereby.