Electrophotography – Control of electrophotography process – Control of developing
Patent
1997-12-15
2000-10-31
Grimley, Arthur T.
Electrophotography
Control of electrophotography process
Control of developing
399 59, 399 60, 399 61, 399 62, G03G 1500
Patent
active
06141509&
ABSTRACT:
A toner content control device for an electrophotographic apparatus of the type using a toner and carrier mixture. The control device determines an amount of toner replenishment on the basis of a difference between the toner content of the developer and a reference value, while correcting the reference value in accordance with the condition of a reference pattern formed on a photoconductive element. Although the control device includes a toner content sensor and a pattern density sensor, it omits conventional means for adjusting the toner content sensor. The control device is therefore capable of controlling image density stably with an inexpensive configuration.
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Grimley Arthur T.
Noe William A.
Ricoh & Company, Ltd.
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