Photographic products including liquid spreading means

Details Photographic products including liquid spreading means Photographic products including liquid spreading means

1981-07-13

1983-01-25

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

With structural limitation

430207, 430496, 430499, G03C 554, G03C 176, G03C 140, G03C 524

Patent

active

043704077

ABSTRACT:
A photographic film unit which includes first and second superposed sheets, and is processable by distributing a liquid between the sheets, is provided with liquid directing means that present a greater resistance to liquid flow in a longitudinal direction than in a transverse direction. Transverse barrier ridges, which are small compared to the depth of the liquid, are positioned between the sheets to inhibit the flow in the predetermined direction while flow continues uninhibited or is enhanced in the transverse direction along the ridges. Other embodiments employ stripes having different degrees of hydrophobicity.

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patent: 3221942 (1965-12-01), Glass
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patent: 3541938 (1970-01-01), Harvey
patent: 3652282 (1972-03-01), Land
patent: 3672272 (1972-06-01), Cole
patent: 3672273 (1972-06-01), Nerwin

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