Film feeding system of a camera
US4460256A · kind A · utility
12Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1981 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Nov 20, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/425
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film advancing system of a camera in which a roll of film inside a film cartridge is first wound to a spool and then the film is rewound into the cartridge one frame from another after each photographic operation is provided. The system includes a reversibly rotatable motor the drivement and rotational direction of which are automatically controlled depending upon various conditions of the camera to implement required advancement of the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.