US PATENT SUBCLASS 353 / 95
FILM GATE
Current as of: June, 1999
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DEFINITION
Classification: 353/95
(under the class definition) Subject matter including structure in the optical path which positions a film strip in the focal plane of the projector and masks the film edges so that a single frame or picture area is projected.
(1) Note. Usually the gate includes an aperture plate for framing and a pressure plate for positioning the film against the aperture plate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23, for a projector having a film gate which includes a transparent plate.
69, for a projector with means to compensate for warpage, varying size, thickness or density of film or slides.
84, for a film gate in combination with a color filter.
97, for a projector with an aperture plate or diaphragm. SEE OR SEARCH CLASS
352, Optics: Motion Pictures,
221+, for motion-pictures film gates.
