Patent ID: 7670013
Filing Date: 2010-03-02
Classification: B29D,G02B,Y10T

Abstract:
1. A retroreflective article comprising plural triangular-pyramidal cube-corner retroreflective element pairs formed of parallel V-shaped groove groups (x, x, x, . . . , y, y, y, . . . , and z, z, z, . . . ) from three directions of x direction, y direction, and z direction and set on a common plane (S-S′) defined by base line groups of the parallel V-shaped groove groups, in which (I) one-side groove angle (GLx, GRx, GLy, GRy, GLz, or GRz) formed between a cross line between (i) a plane vertical to the common plane (S-S′) and to a V-groove vertical plane (Svx, Svy, or Svz) which includes the base line of a V-shaped groove and is vertical to the common plane (S-S′), and a reflective lateral face (a (II) at least one of said parallel V-shaped groove groups comprises a V-shaped groove angle in which a one-side groove angle (GL or GR) continuously changes in a horizontally-symmetric state (GL=GR), said one-side groove angle does not form a constant angle in the reflective lateral face, and the reflective lateral face forms a curved and/or multiple surface.