Image forming apparatus and image forming method
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United States of America Patent
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Apr 29, 2014
Grant Date -
Sep 20, 2012
app pub date -
Mar 5, 2012
filing date -
Mar 18, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An image forming apparatus includes an image carrier to carry a toner image, a transfer member to form a transfer nip by contacting the image carrier surface, and a power supply to output a voltage to the recording material captured in the transfer nip so as to transfer the toner image formed on the image carrier surface. The voltage is switching alternately between a voltage in the transfer direction and a voltage opposite to the voltage in the transfer direction, and a time average value (Vave) of the voltage is set to have a polarity of the transfer direction, and is set to a value in the transfer voltage side, and a change mode to change a cycle of the voltage output from the power supply can be changed based on the toner deterioration information which determines the deterioration status of the toner.
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