US PATENT SUBCLASS 399 / 207
.~.~.~ Diaphragm, shutter, shading board

Current as of: June, 1999
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399 /   HD   ELECTROPHOTOGRAPHY

130  DF  IMAGE FORMATION {30}
177  DF  .~ Exposure {15}
206  DF  .~.~ Slit exposure {8}
207.~.~.~ Diaphragm, shutter, shading board

DEFINITION

Classification: 399/207

Diaphragm, shutter, shading board:

(under subclass 206) Subject matter wherein a means or method is provided between an original and a photoconductive member for regulating or adjusting the cross-sectional area of the light reaching the photoconductive member.

SEE OR SEARCH CLASS

355, Photocopying,

71, for a projection-type copier with a shutter in the illumination system.