Electric heating – Microwave heating – Tunnel furnace
Patent
1977-04-25
1981-10-06
Hix, L. T.
Electric heating
Microwave heating
Tunnel furnace
354300, 34155, 219216, 219388, G03D 700
Patent
active
042932122
ABSTRACT:
A thermal processor in an apparatus for heat development of a fixed photographic image on a photographic film wherein the film includes a latent image formed on an emulsion layer coated on a film base. The apparatus comprises a housing arranged to receive uniformly heated flowing air. Porous members responsive to the air flow are disposed adjacent both surfaces of the film to uniformly distribute the heated air to the surfaces of the film at a predetermined pressure. The porous members are disposed at a spacing from the respective film surfaces such that the pressure of the gas supplied to the film establishes a gas bearing to support the film as it passes through the processor. The spacing is also arranged such that heat is transferred from the processor to the film essentially by heat conduction to develop the fixed photographic image on the film.
REFERENCES:
patent: 3041740 (1962-07-01), Allen
patent: 3496332 (1970-02-01), Lunde
patent: 3585917 (1971-06-01), Griffith
patent: 3727534 (1973-04-01), Low et al.
patent: 3851403 (1974-12-01), Maurischat et al.
patent: 4052732 (1977-10-01), Meadows
Horton Charles R.
Scott Richard D.
Siryj Bohdan W.
Cohen Samuel
Hix L. T,.
Lazar Joseph D.
Mathews Alan
RCA Corporation
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