Film advancing apparatus
US4664492A · kind A · utility
1Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Jul 31, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/586
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Film advancing apparatus for moving a thin, planar, resilient film unit at least partially from a film cassette. The apparatus includes a member for applying a force to one end of the film unit while simultaneously blocking its movement through an egress in the film cassette, thus causing the film unit to assume a flexed stressed configuration. When the egress is unblocked, the resiliency of the film unit provides a force for moving an opposite end of the film unit out of the film cassette via the egress as it assumes its original planar configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.