Method of making randomly oriented cube-corner articles
US6050691A · kind A · utility
10Cited by
26References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1998 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Oct 19, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective cube-corner articles having randomly oriented cube-corner elements exhibiting rotational symmetry and entrance angularity like microsphere-based sheeting but having increased retroreflective efficiency from cube-corners. The inventive sheeting may contain cube-corner elements typically of different cube-corner geometries, different cube-corner dimensions, and different central axis heights. The cube-corner elements are positioned randomly and are typically not adjacent to one another. Also, methods of making such articles are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.