G - Physics – 03 – D
Patent
G - Physics
03
D
95/86
G03D 13/00 (2006.01)
Patent
CA 1053055
IMPROVED APPARATUS FOR DEVELOPING AND FIXING HEAT SENSITIVE FILM Abstract of the Disclosure A film developer-fixer for diazo, vesicular or similar film in which the exposed film is developed by subjecting it to high temperatures. 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 station 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 posi- tively advanced in a downstream direction and means is provided for cooling the rollers with cooling air supplied to the support structure cavities mentioned above.
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