Photocopying – Contact printing – Light boxes
Patent
1990-02-05
1991-12-03
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118689, 118692, 355208, 355209, 355326, G03G 2100
Patent
active
050703684
ABSTRACT:
A developing apparatus which includes a plurality of developing units individually provided with sensors for detecting amounts of toner accommodated therein, includes a judging device for judging whether or not sensor outputs of other developing units are below a replenishable amount when a sensor output of one developing unit falls below a replenishing requiring amount, and a replenishing display device for urging toner replenishment, based on the result of the above judgement, with respect to the developing unit having the sensor output below the replenishing requiring amount and the developing unit whose sensor output is below the replenishable amount.
REFERENCES:
patent: 3910232 (1975-10-01), Kondo et al.
patent: 4647185 (1987-03-01), Takeda et al.
patent: 4897690 (1990-01-01), Takano
patent: 4951091 (1990-08-01), Nawata
Inamoto Kiyoshi
Nishiyama Hidetomo
Ohnishi Kazuyuki
Okano Tokiyuki
Shimazawa Yoichi
Grimley A. T.
Horgan Christopher
Sharp Kabushiki Kaisha
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