Image forming apparatus with controlled charging voltage

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United States of America Patent

PATENT NO 9690226
APP PUB NO 20160282745A1
SERIAL NO

15059930

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Importance

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Abstract

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A controller sets an AC voltage Vac, applies the voltage to a charging roller, and measures a DC component of a charging current flowing from the charging roller to a photosensitive drum. When it is determined that an absolute value of a measured value of the DC component in the charging current is lower than a prediction value, the controller sets an AC voltage Vac that differs from the AC voltage Vac set in step S4, and applies the voltage to the charging roller. Thereby, a charging current capable of performing sufficient charging can be flown to the photosensitive drum, and the photosensitive drum can thereby be charged to a desired surface potential.

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First Claim

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Komatsu, Isao Kashiwa-shi, JP 16 33

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