Large capacity film cassette
US4018518A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1974 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Dec 10, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/323
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic film cassette including a drive transmission arrangement configured for operating a film capstan and for selectively driving supply and take-up reels of the cassette responsive to projector driving operation. The cassette is a large capacity film cassette for use with automatic projector apparatus of the type having a cassette-receiving well smaller than the space occupied by take-up and supply reels of the large capacity cassette and is provided with a tongue-like housing portion receivable in the cassette well of the projection apparatus. Contained within the cassette is reversible drive transmission by which drive spindles in the cassette well are coupled to both an isolating capstan and the film reels to effect advancing movement of the film strip from the supply reel to the take-up reel during projection and rewinding movement of the film strip back to the supply reel after projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.