Thermally responsive photographic processing apparatus for use w

Details Thermally responsive photographic processing apparatus for use w Thermally responsive photographic processing apparatus for use w

1977-04-15

1978-08-01

Hix, L. T.

354 86, G03D 902

Patent

active

041046692

ABSTRACT:
In a photographic processing apparatus of the type including a pair of juxtaposed pressure applying members between which a self-processable type film unit is advanced to apply a pressure to the film unit to spread a viscous processing fluid in a thin layer between a pair of sheet elements of the film unit, a bimetallic strip is provided to sense ambient temperature and in response thereto apply a second pressure to the film unit as it is advanced between the pressure applying members to compensate for temperature induced changes in the fluid's viscosity which cause variations in the thickness of the processing fluid layer such that the bimetallic strip operates to maintain the thickness of the processing fluid layer substantially constant over a predetermined temperature operating range of the apparatus.

REFERENCES:
patent: 2991703 (1961-07-01), Eloranta
patent: 3241468 (1966-03-01), Wolff
patent: 3584563 (1971-06-01), Chen
patent: 3589262 (1971-06-01), Chen
patent: 3604329 (1971-09-01), Land
patent: 3732099 (1973-05-01), Chen
patent: 3777647 (1973-12-01), Land
patent: 3779770 (1973-12-01), Alston et al.
patent: 3820137 (1974-06-01), Driscoll

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