Cube corner cavity based retroreflectors with transparent fill material
US7452588B2 · kind B2 · utility
1Cited by
42References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2001 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | May 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Retroreflective sheeting includes a body layer having a structured surface with recessed faces forming cube corner cavities. A reflective film is disposed at least on the recessed faces, and a fill material fills the cube corner cavities. The fill material comprises radiation-curable materials, adhesives, or both, and preferably transparent radiation-curable pressure-sensitive adhesives. The fill material preferably forms a continuous layer covering both the recessed faces and upper portions of the structured surface. A transparent cover layer preferably contacts the fill material layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.