Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2006-02-21
2006-02-21
Tran, Hoan (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S061000, C399S063000, C399S119000
Reexamination Certificate
active
07003235
ABSTRACT:
A developing device includes a developer including toner having a coloring agent dispersed in a binder resin, and carrier having a core material, and a coating layer covering the core material and containing a binder resin and a powder. A toner density detecting device detects a toner density of the developer by use of a bulk density sensor, and a control device controls the toner density based on a detection result of the toner density detecting device. The toner density is controlled such that ratio (D/h) of an average particle diameter (D) of the powder to a thickness of the coating layer is greater than 1 and less than 10.
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Azami Akira
Ozeki Takamasa
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