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US 2012/0230715 A1Published application
Transfer device and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsYasuhiko OGINO, Haruo Iimura, Shinji Aoki, Keigo Nakamura, Masahide Nakaya, Tomokazu Takeuchi, Shinya Tanaka
Life of this patent
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Abstract
According to an embodiment, a transfer device includes: an image carrier from which an image is transferred onto a transfer medium using electrostatic toner, the image carrier being applied with a direct current voltage superimposed with an alternating current (AC) voltage as a transfer bias. An output voltage of a power source for applying the voltage is controlled so that a current level of a direct current component output from the power source is kept at a specified current level.
Claims9
A transfer device comprising:
- an image carrier from which an image is transferred onto a transfer medium using electrostatic toner, the image carrier being applied with a direct current voltage superimposed with an alternating current (AC) voltage as a transfer bias, wherein
- an output voltage of a power source for applying the voltage is controlled so that a current level of a direct current component output from the power source is kept at a specified current level.
Dependencies are inferred from the claim text.