Triangular-pyramidal cube-corner retro-reflective sheeting

Details Triangular-pyramidal cube-corner retro-reflective sheeting Triangular-pyramidal cube-corner retro-reflective sheeting

2005-09-13

2005-09-13

Phan, James (Department: 2872)

Optical: systems and elements

Signal reflector

3-corner retroreflective

C359S529000

Reexamination Certificate

active

06942350

ABSTRACT:
A triangular-pyramidal cube-corner retroreflective sheeting wherein a pair of triangular-pyramidal cube-corner retroreflective elements partitioned by three lateral faces (face a1, b1, and c1; faces a2, b2, and c2; . . . ) intersect almost perpendicularly because intersecting V-shaped grooves having substantially-symmetric cross sections are arranged in a closest-packed state so as to protrude to one side on a common-bottom plane (S-S′). Opposite faces (faces c1and c2) of this pair of triangular-pyramidal retroreflective elements share a base (x), the common bottom plane (S-S′) including bases (z and z) of one-side lateral faces (faces a1and a2) and bases (y and y) of the other-side lateral faces (face b1and b2), this pair of triangular-pyramidal retroreflective elements have faced lateral faces (face c1and c2) with shapes, and heights from the bottom plane (S-S′) up to apexes of the elements, that differ from each other.

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