Photographic camera with film threading apparatus
US4992812A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera adapted for use with a film cassette containing a non-protruding film leader which can be automatically propelled out of the cassette, a plurality of film guide members are located along opposite sides of a film advance path leading from a receiving chamber for the cassette to a film take-up means. The guide members are movable closer together to transversely bow the film leader to thereby increase the longitudinal stiffness of the leader to facilitate its being propelled along the film advance path without being snagged. When the film leader is secured to the film take-up means, the guide members are moved slightly apart to permit a film pressure plate to flatten successive imaging areas of the filmstrip over an exposure opening in the film advance path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.