Dual web sound movie cassette with emulsion stripping web
US4370035A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1980 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | May 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multipurpose audio/visual film cassette (10) including supply and takeup spools (26, 28) in which opposite ends of a film strip (30) are coupled for alternate winding and unwinding during passage through a first path for film exposing, processing and projecting operations with an audio tape (54) also coupled at least on one end with the supply spool (26) and interwound with the film strip (30) to pass through a separate path, and a stripping and separating web (80) is coupled at least on one end to the supply spool (26) and preferably extending directly to the takeup spool (28) in a third path with the web (80) being arranged to overlie the side of the film strip (30) on which processing fluid is deposited and wound in convolutions between such side and the audio tape (54) to prevent adherence of the audio tape (54) to the film strip (30) and to strip a negative emulsion layer from the film strip (30) after processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.