Transfer device with transfer voltage unit and image forming apparatus using the same
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United States of America Patent
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Jul 14, 2015
Grant Date -
Jun 6, 2013
app pub date -
Dec 4, 2012
filing date -
Dec 6, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
According to an embodiment, provided is a transfer device including: a nip forming member that abuts against a surface of an image carrier carrying a toner image; and a transfer voltage application unit that applies a transfer voltage including a DC component and an AC component. The transfer voltage is an alternating voltage in which a supply voltage having polarity in a transfer direction and a return voltage having polarity opposite. A time average value Vave of the transfer voltage is set to be at polarity in the transfer direction and is set to be closer to a peak value Vt of the supply voltage relative to a center value Voff between a maximum and minimum value. An absolute value of the peak value Vr of the return voltage is set to be larger than an absolute value of the time average value Vave.
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