Apparatus for developing and fixing heat sensitive film
US4052732A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D13/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film developer-fixer for diazo, vesicular or similar film in which the exposed film is developed by subjecting it to high temperature. The film is moved continuously at a constant speed past a developing station defined by a pair of opposing, spaced apart heating platens; the spacing between the platens exceeds the thickness of the film. Heated air is blown against the film emulsion to generate an air bearing for the film. Downstream of the developing station is a film cooling station and downstream of the cooling station a fixing station where the developed emulsion is subjected to light to permanently fix the images thereon. The cooling and the fixing stations are disposed in cavities defined by a supporting structure and they communicate with a source of cooling air for cooling the film and the components of the apparatus. Transport means is defined by a plurality of roller sets having polished surfaces. The rollers are rotated at a speed equal to the speed of the film, their spacing is less than the length of the film (in the direction of travel) so that the film is always positively advanced in a downstream direction and means is provided for cooling the rollers with cooling…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.