Thermal processor

Details Thermal processor Thermal processor

1981-02-13

1983-02-01

Hix, L. T.

Electric heating

Microwave heating

Tunnel furnace

354300, 219216, 219373, 219388, G03D 700

Patent

active

043712460

ABSTRACT:
A length of photographic film being developed by heat is supported on a fluid bearing by heated air which passes through two porous elements which serve as the walls of the film path. The air is preheated and the porous elements themselves are separately heated within and beyond the film passageway in order further to raise the temperature of the air bearing. The edges of the path are heated to a higher temperature than the center of the path to thereby compensate for edge effects at the film. The added heat at the edges of the path provide more uniform heating of the film across the width dimension of the film.

REFERENCES:
patent: 3496332 (1970-02-01), Lunde
patent: 3585917 (1971-06-01), Griffith
patent: 3850635 (1974-11-01), Leavitt
patent: 4052732 (1977-10-01), Meadows
patent: 4148575 (1979-04-01), Siryj
patent: 4198145 (1980-04-01), Scott
patent: 4293212 (1981-10-01), Siryj et al.

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