Light lock
US5101229A · kind A · utility
2Cited by
14References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Dec 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light lock is formed by a channel with spaced walls, with the channel being open at one side. A light absorbing material is positioned in the channel and has bristles projecting toward the opening. A flange projects through the opening toward the material but is spaced from the bristles. The channel can be formed on one portion of a magazine, cassette or the like, for light tight materials such as photographic film, and the flange can be formed on another portion of such a magazine or cassette.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.