Film wind-up apparatus
US4720719A · kind A · utility
3Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1987 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Feb 26, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film wind-up apparatus is incorporated in an interchangeable film magazine adapted to receive a film which has a backing paper including a leading end portion. The winding device automatically winds up the leading end portion only after the magazine is attached to a camera having a winding motor, film is loaded in the film magazine, the back cover of the magazine is closed, and a light-shielding plate is removed. Upon completion of the winding operation, a photosensitive portion of the film faces the exposure aperture, and a camera so equipped is ready to make exposures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.