Film cassette with lockable light shield

Details Film cassette with lockable light shield Film cassette with lockable light shield

1994-01-13

1994-10-25

Gellner, Michael L.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354277, 2423484, G03B 1726

Patent

active

053593782

ABSTRACT:
A film cassette comprises light blocking means supported for movement to a light blocking position for preventing ambient light from entering the cassette interior and to a non-blocking position. The light blocking means has a cavity for receiving a driver element in driving engagement to allow the driver element to move the light blocking means from its light blocking position to its non-blocking position. A locking pawl protrudes into the cavity to secure the light blocking means in its light blocking position and is adapted to be displaced from the cavity to release the light blocking means when the driver element is received in the cavity.

REFERENCES:
patent: 4255034 (1981-03-01), Harvey et al.
patent: 4802633 (1989-02-01), Beery
patent: 5083721 (1992-01-01), Okutsu et al.
patent: 5112003 (1992-05-01), Covington et al.
patent: 5115268 (1992-05-01), Kitagawa et al.
patent: 5200777 (1993-04-01), Zander
patent: 5231438 (1993-07-01), Smart

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