Camera apparatus for preventing initialization of partly or fully exposed film stored in a self-thrusting cassette
US5138350A · kind A · utility
10Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | May 13, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a photographic camera to be used with a light-tight cassette which can be operated to thrust a filmstrip out of the cassette whether the a filmstrip is completely unexposed, partly exposed or fully exposed and which has a status indicator for providing a visible indication of the exposure status of the filmstrip, a film transport mechanism for operating the cassette is disabled whenever the cassette is inadvertently loaded in the camera with the status indicator indicating the filmstrip is partly or fully exposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.