Photocopying – Contact printing – Light boxes
Patent
1989-02-13
1990-05-01
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355214, 355233, 355 69, 355243, G03G 1500, G03G 1504, G03B 2780
Patent
active
049222961
ABSTRACT:
An image reproducing apparatus with or without an ADF has an optical system for scanning an original, a developing unit, a fixing unit, a differential amplifier, and a microcomputer. Original image density can be measured properly in any mode of the apparatus. The image is reproduced to have optimal density by a lamp control voltage from the differential amplifier. Toner deficiency or the like can be indicated with a few number or displays and/or indicators. Upon detection of toner deficiency or the like, the current copying cycle is completed first and the apparatus is stopped. The copying operation can be resumed after the toner deficiency or the like is eliminated.
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Adachi Hideki
Kasuya Yukio
Tomosada Masahiro
Canon Kabushiki Kaisha
Pendegrass Joan H.
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