Textured retroreflective prism structures and molds for forming same
US6770225B2 · kind B2 · utility
46Cited by
23References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jul 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective prism sheeting is formed in a mold with textured facets and/or windows thereon. Smaller prisms are formed adjacent larger prisms. Optionally, the optical axis of the prisms may be tilted with respect to one another, preferably in a negative direction. The textured facets or windows provide more uniform retroreflected light intensity distribution and whiteness of the sheeting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.