Fluid receiving trap with air releasing means comprising a proce

Details Fluid receiving trap with air releasing means comprising a proce Fluid receiving trap with air releasing means comprising a proce

1975-07-11

1977-08-16

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

354304, G03C 148, G03D 902

Patent

active

040423964

ABSTRACT:
In a photographic film unit having a pair of sheets connected in superposition with a photosensitive layer located between the sheets, a container carrying a quantity of processing composition is arranged to provide for the discharge of the composition to between the sheets at the leading end of the film unit. A fluid receiver or trap is provided at the trailing end of the film unit to receive and store excess processing composition after it has been spread between the sheets. The trap includes trap spacing means, trap cover means, and trap-venting means formed of a plurality of holes through the trap cover means. The improvement comprises a processing-composition-impervious layer on the surface of and substantially coextensive with the trap spacing means adjacent the trap cover means whereby the processing composition is restrained from reaching the trap-venting holes without restraining air or gas from reaching the venting holes for escape from the film unit. The impervious layer may be sealed to the trap cover means transversely of the film unit along the trailing edge of the trap spacing means to improve the restraint of the processing composition.

REFERENCES:
patent: 2500422 (1950-03-01), Land
patent: 2686716 (1954-08-01), Land
patent: 3607285 (1971-09-01), Chen
patent: 3615540 (1971-10-01), Land
patent: 3619193 (1971-11-01), Knight
patent: 3783075 (1974-01-01), Land
patent: 3816128 (1974-06-01), Chen

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