Cover sheets for integral imaging receiver elements
US4190447A · kind A · utility
7Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Dec 18, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cover sheet for an integral imaging receiver element comprises a support, a neutralizing layer, at least one timing layer and an alkali permeable hydrophilic layer. The cover sheet may also contain a second alkali permeable layer coated over the alkali permeable hydrophilic layer to promote adhesion of the cover sheet to the other components of the film unit. The photographic film units containing the cover sheets are substantially free from dark spot imperfections and are resistant to delamination of the unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.