Optics: motion pictures – With film treating or working
Patent
1979-08-06
1980-12-09
Hayes, Monroe H.
Optics: motion pictures
With film treating or working
352 72, 352 78R, G03C 1100
Patent
active
042381452
ABSTRACT:
A multipurpose film handling cassette of the type in which a photographic film strip is exposed, processed and projected without removal of the film from the cassette is provided with a one-piece indicating element for signaling to the apparatus with which it is to be used the unprocessed or processed condition of the film within the cassette. A contact element is held, prior to processing, against a spring force into a first position wherein it will be engaged by a pair of contacts in the other apparatus when inserted therein. The element is held in this unprocessed position by a slidable element, which element is displaced responsive to film advancement following processing. Such movement of the slidable element permits the biasing force to displace the contact element to a second position wherein it will not be engaged by the contact of the other apparatus, thus signaling the presence of a processed cassette.
REFERENCES:
patent: 3778140 (1973-12-01), Land
patent: 3785725 (1974-01-01), Batter et al.
patent: 3830564 (1974-08-01), Batter
patent: 3832048 (1974-08-01), Batter et al.
patent: 3879116 (1975-04-01), Land
patent: 4003064 (1977-01-01), Mason
Goettel, Jr. Frederick A.
Hayes Monroe H.
Polaroid Corporation
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