Patent ID: 9372288
Filing Date: 2016-06-21
CPC Classification: G02B

Claim Text:
1. A cube-corner retroreflective sheeting having a plurality of regions in which cube-corner retroreflective elements having predetermined rotation angle characteristics are arranged in a closest-packed state, wherein the respective cube-corner retroreflective elements in at least two mutually adjacent regions are rotated with each other around an axis perpendicular to the sheeting, each of the regions including a cube-corner retroreflective element that is not in contact with a boundary between the regions and a cube-corner retroreflective element that is in contact with the boundary between the regions, the cube-corner retroreflective element that is not in contact with respective boundaries between the regions provides three quadrangular reflective lateral surfaces perpendicular to one another having one apex in common, such cube-corner retroreflective element having three edge lines each being one common side of the mutually adjacent reflective lateral surfaces and having a hexagonal shape by sides of the respective reflective lateral surfaces that are not common sides of mutually adjacent reflective lateral surfaces, the cube-corner retroreflective element that is in contact with the respective boundaries between the regions has a quadrangular or pentagonal shape obtained by cutting part of one or two quadrangular reflective lateral surfaces of the cube-corner retroreflective element having the hexagonal shape to form the reflective lateral surface in a triangular shape, and only the triangular reflective lateral surface that is partly cut off is in contact with the boundary between the regions.