US PATENT SUBCLASS 352 / 226
.~ With removable aperture plate

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

221  DF  GATES {9}
226.~ With removable aperture plate

DEFINITION

Classification: 352/226

(under subclass 221) Subject matter in which the aperture plate is removably mounted in the remaining film gate structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

79+, for apparatus employing changeable aperture plates such that picture carriers with different size frames may be accommodated.

130, for apparatus employing aperture plates replaceable with cleaning means to clean the motion picture film.