Driver device for opening light shield of film cassette biases l

Details Driver device for opening light shield of film cassette biases l Driver device for opening light shield of film cassette biases l

1994-08-19

1995-09-19

Gellner, Michael L.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354277, 2423484, G03B 1726

Patent

active

054520380

ABSTRACT:
When a film cassette having a light shield that can be rotated open to permit film movement out of and into the cassette interior is loaded into a camera, a torsionally-compliant driver device of the camera for rotating the light shield open and closed is twisted, responsive to initial engagement with the light shield, to oppositely bias the light shield closed.

REFERENCES:
patent: 2317096 (1943-04-01), Dunn
patent: 2731894 (1956-01-01), Leitz et al.
patent: 4255034 (1981-03-01), Harvey et al.
patent: 5231438 (1993-07-01), Smart
patent: 5357303 (1994-10-01), Wirt
patent: 5359378 (1994-10-01), Zander et al.

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