Cube-corner retroreflective articles
US5272562A · kind A · utility
84Cited by
7References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1993 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Feb 5, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1405
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A retroreflective article (30, 50) has opaque pigment particles (38, 58) dispersed in a retroreflective region (33, 53) of a front portion (35, 55) of a sheeting (32, 52) that includes a body portion (34, 54) and a multitude of cube-corner elements (36, 56). The opaque pigment particles (38, 58) scatter white, yellow, or light brown light to allow the retroreflective article to demonstrate improved lightness and, if colored fluorescent, improved fluorescence. The improvement in lightness and fluorescence makes the retroreflective articles more conspicuous to persons during the daytime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.