Patent ID: 8251525
Filing Date: 2012-08-28
Classification: B29C,B29D,B29L,G02B,Y10T

Abstract:
1. Retroreflective sheeting, comprising a plurality of grooves that include a plurality of cube corner elements each of which has a first groove surface that is a part of the first groove, a second groove surface that is a part of the second groove, and a primary groove face; wherein the first groove and the second groove are parallel to each other within the degree of precision of the manufacturing process; wherein the first groove is nonparallel to a reference plane by amounts ranging from less than about 1 degree to greater than the degree of precision of the manufacturing process; wherein the reference plane corresponds to the y-z plane in a Cartesian coordinate system where the x-y plane extends substantially coplanar with the sheeting along which the cube corner elements are located and the x-z plane contains the primary groove vertex; and