Photocopying – Contact printing – Light boxes
Patent
1988-02-22
1990-08-28
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355204, 355206, 355245, 355326, G03G 2100, G03G 1501, G03G 1506
Patent
active
049529870
ABSTRACT:
A copying machine provided removably with plural developing units containing different colors of toner. Control unit of the copying machine detects the loading condition of the developer and inhibits the start of copying operation when at least one developing unit is not loaded into the copying machine. The control unit further performs a quick toner supply control, a control for a request for change-over of a developing unit being supplied with toner, and a control for the indication of a residual quantity of toner. The developing unit change-over control is performed so that a developing unit drive mechanism is changed over after the developer so far used is recovered into the developing unit.
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Braun Fred L.
Minolta Camera Kabushiki Kaisha
Smith Matthew S.
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