Patent ID: 8909079
Filing Date: 2014-12-09
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image carrier movable in a predetermined moving direction and to carry a toner image; a first rotary body to contact an outer surface of the image carrier; a second rotary body pressed against an inner surface of the image carrier to form a transfer nip between the outer surface of the image carrier and the first rotary body; and a transfer bias generator to output to the second rotary body a transfer bias including a direct current component and an alternating current component for application to the image carrier to transfer the toner image from the image carrier onto a recording medium conveyed through the transfer nip, the transfer bias generator including: the transfer bias generator outputting at least the alternating current component under one of constant voltage control and constant current control and changing a target output value of the alternating current component separately from the direct current component from a non-zero value to another non-zero value according to the toner adhesion amount detected by the controller.