Expanded retroreflective sheet material
US4712868A · kind A · utility
43Cited by
18References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Sep 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24314
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective sheet material capable of retroreflecting light at high incidence angles is prepared by laminating retroreflective sheeting to a base sheet, slitting the laminated sheet assembly in an array of spaced discontinuous slits, and expanding the laminated sheet assembly so that openings occur at the slits and portions of the laminated sheet assembly between the slits bend out of the plane which they originally occupied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.