Triangular-pyramidal cube-corner retroreflective sheeting
US6685323B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Aug 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a triangular-pyramidal cube-corner retroreflective sheeting having a novel structure characterized in that a lateral face (face c) using a base edge (x) of triangular-pyramidal reflective elements faced each other and arranged in the closest-packed state by sharing the base edge (x) on a first bottom plane (virtual plane X-X′) forms a triangle, two other faces (faces a and b) sharing one ridge line started from an apex (H) of the triangular-pyramidal reflective elements form a quadrangle, and the height (h′) from the apex (H) up to the first bottom plane (virtual plane X-X′) is substantially smaller than the height (h) from the apex (H) up to the substantially horizontal second bottom plane (Z-Z′) including base edges (z and w) of the other lateral faces (faces a and b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.