Camera apparatus for preventing initialization of exposed film stored in a self-thrusting cassette
US4980709A · kind A · utility
10Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1990 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Mar 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera to be used with a light-tight cassette which can be operated to automatically thrust a filmstrip out of the cassette whether the filmstrip is generally unexposed, partly exposed or substantially 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 its status indicator indicating the filmstrip is substantially exposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.