Film cassette

Details Film cassette Film cassette

1989-01-12

1990-01-16

Hix, L. T.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 711, G03B 1726

Patent

active

048946737

ABSTRACT:
In a film cassette, an "exposure-completed" indicator is positioned within a film passage slit to the outside of the cassette shell to be normally covered by the filmstrip. The indicator is uncovered by the filmstrip only when a leader section of the filmstrip is wound through the film passage slit further into the cassette shell, after the filmstrip is completely exposed in a camera. A window is provided in the cassette shell to view the indicator whenever it is uncovered by the filmstrip. This feature is useful to prevent double exposure of the filmstrip, by informing the photographer that the filmstrip should not be re-used in the camera.

REFERENCES:
patent: 3467341 (1966-11-01), Roman
patent: 3747865 (1973-07-01), Tobey
patent: 3768894 (1973-10-01), Cook

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