Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1981-05-26
1982-10-26
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430210, 430497, G03C 148
Patent
active
043562485
ABSTRACT:
A photographic film unit of the type comprising two sheets between which a fluid composition is adapted to be spread during processing of a latent image, comprising a fluid trap and gas vent structure for releasing gases expelled from the film unit during the spreading of the processing composition and for receiving excess quantities of the fluid composition, in which a plurality of flow passages are provided in the path of the escaping gas and the advancing fluid composition, and in which a portion of the trap structure comprises a flexible diaphragm forming an expansible chamber having a low impedance to fluid flow relative to the resistance to flow of a plurality of gas vent passages that are provided.
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Brown J. Travis
Ericson John W.
Polaroid Corporation
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