Electrophotography – Control of electrophotography process – Control of developing
Reexamination Certificate
2006-10-19
2009-02-24
Gray, David M (Department: 2852)
Electrophotography
Control of electrophotography process
Control of developing
C399S027000, C399S030000, C399S058000
Reexamination Certificate
active
07496305
ABSTRACT:
An image forming apparatus using a two-component developer includes a sensor mechanism, an image forming mechanism, a toner supply controller, a memory, an estimation mechanism, and a correction mechanism. The sensor mechanism detects a toner density of the developer. The image forming mechanism produces a toner image at one of at least two selectable process linear speeds. The toner supply controller controls a toner amount based on a result by the sensor mechanism. The memory stores data of an external input voltage for adjusting a variation in an output voltage of the sensor mechanism. The estimation mechanism estimates a difference between output voltages of the sensor mechanism before and after a speed selection of the at least two linear speeds is changed. The correction mechanism corrects the output voltage of the sensor mechanism when a speed selection of the at least two selectable process linear speeds is changed.
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Gray David M
Hyder G. M.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh Co. Ltd.
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