Instant film unit

Details Instant film unit Instant film unit

1980-04-24

1981-09-08

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Structurally defined

430207, 430499, G03C 148, G03C 176

Patent

active

042885337

ABSTRACT:
A photographic film unit, which includes a photosensitive sheet and a cover sheet separated by a spacer, is provided with a small access port for introducing a processing fluid from the exterior of the film unit into the space between the sheets and a small venting port for releasing air displaced from such space by the introduction of the processing fluid. The spacer surrounds substantially the entire edge perimeter of the film unit in a border area thereof. The access and venting ports extend through the spacer in this border area at diagonally opposite corners of the film unit.

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patent: 3674622 (1972-07-01), Plasse
patent: 3696716 (1972-10-01), Pasieka
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