Processing apparatus for instant type transparency film
US4307955A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Dec 15, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D9/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus including a housing and a disposable film processing kit for processing an exposed roll of instant or self-developing type transparency film. The kit includes a roller supporting a coiled length of sheet material, a drum having one end of the sheet material attached thereto, and a processing composition dispenser located therebetween. The kit is adapted to be inserted into the housing, and an end of an exposed strip of film is threaded across a sprocket wheel and directed towards the drum. The sprocket wheel and the drum are driven in a direction so as to wind the film and sheet material upon the drum with a layer of the processing composition located therebetween. The drum is provided with a single resiliently mounted projection which is adapted to enter a sprocket hole in the film to facilitate the movement of the end of the film to a position between the spreader sheet and the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.