Image forming apparatus with self-diagnosis mode

Details Image forming apparatus with self-diagnosis mode Image forming apparatus with self-diagnosis mode

2005-04-12

2005-04-12

Grainger, Quana (Department: 2852)

Electrophotography

Diagnostics

Consumable

Reexamination Certificate

active

06879787

ABSTRACT:
Each of a plurality of developing units accommodates toner of different color. Toner images of the different colors are formed on corresponding image carriers and sequentially transferred onto an image transfer medium. Toner remaining on the image carriers is recovered after transfer of toner image of particular color. The toner recovered is supplied to corresponding developing unit for reuse. A controller controls the operation of the image forming apparatus. The controller starts a self-diagnosis mode when receiving an interruption signal. The self-diagnosis mode includes detecting how the toners of different colors are mixed in each developing unit.

REFERENCES:
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patent: 6721534 (2004-04-01), Takahashi
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patent: 2000-242152 (2000-09-01), None

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