Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2007-06-12
2009-06-23
Gray, David M (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S058000
Reexamination Certificate
active
07551862
ABSTRACT:
A developing device including a developer bearing member configured to configured to bear thereon a developer including a toner and a magnetic carrier to develop an electrostatic image on an image bearing member with the developer; a developer container configured to contain and feed the developer to the developer bearing member; a toner concentration sensor configured to detect a concentration of the toner in the developer in the developer container and output a signal depending on the detected toner concentration; and a characteristic information storage device configured to store a characteristic of the toner concentration sensor, wherein the sensor information storage device is separated from the toner concentration sensor. A process unit including an image bearing member and the developing device. An image forming apparatus including an image bearing member, the developing device and a controller.
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Fujimori Kohta
Hasegawa Shin
Hirayama Yushi
Takeuchi Nobutaka
Tanaka Kayoko
Gray David M
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ready Bryan P
Ricoh Company Limited
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