Film cassette with exposure status indicator

Details Film cassette with exposure status indicator Film cassette with exposure status indicator

1990-05-29

1991-09-17

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, G03B 1726

Patent

active

050487701

ABSTRACT:
A film cassette comprises a spool rotatable about an axis to thrust a filmstrip coiled about the spool out of the cassette shell, and an exposure status indicator rotatable about the axis from an unexposed position to an exposed position for providing respective indications that the filmstrip is unexposed or is exposed. According to the invention, the shell and the status indicator include respective engagable means at least one of which is supported for movement relative to the other substantially radially of the axis in opposite directions for engagement to secure the status indicator in its unexposed and exposed positions and for disengagement to permit rotation of the status indicator from the unexposed to the exposed position.

REFERENCES:
patent: 3831881 (1974-08-01), Tucker
patent: 4887110 (1989-12-01), Harvey
patent: 4978985 (1990-12-01), Smart et al.
patent: 4987437 (1991-01-01), Pagano et al.

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