US Patent No: 5,136,314
Number of patents in Portfolio can not be more than 2000
Film feeding apparatus in a camera
Stats
-
Aug 4, 1992
Issued date -
Aug 28, 1991
filing date -
07/758,307
serial no -
Expired
status
Importance
Loading Importance Indicators...
Abstract
A film feeding apparatus in a camera comprises a feeding device for feeding film from a film cartridge, a take-up spool device for taking up the film fed by the feeding device, and a judgment device for judging on the basis of a variation in the movement speed of the film whether the film has been taken up by the take-up spool. The movement speed of the film is determined by the feeding device before the film extending from the film cartridge is taken up by the take-up spool device, and the movement speed of the film is determined by the take-up spool device after the film has been taken up by the take-up spool device. The movement speed of the film driven by the feeding device differs from the movement speed of the film driven by the take-up spool device.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| RE32558 Autorewinding self-threading camera | 9 | 1985 | |
| 4,834,306 Film cassette | 150 | 1988 | |
| 4,832,275 Film cassette | 85 | 1988 | |
|
|
|||
| 4,579,435 Film transportation system for motor built-in camera | 20 | 1984 | |