US PATENT SUBCLASS 352 / 225
.~ With reciprocating pressure plate

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

221  DF  GATES {9}
225.~ With reciprocating pressure plate

DEFINITION

Classification: 352/225

(under subclass 221) Subject matter including a pressure plate which is cyclically moved in relation to the aperture

plate so as to exert an intermittent pressure upon the motion picture film.