Patent ID: 8977153
Filing Date: 2015-03-10
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image bearing member that bears a toner image; a transfer member that forms a transfer nip between the image bearing member and the transfer member; a power source that outputs any one of a DC transfer voltage and a superimposed transfer voltage in which an AC voltage is superimposed on a DC voltage to transfer the toner image from the image bearing member onto a recording sheet at the transfer nip; and a controller that controls the power source and changes a transfer speed for transferring the toner image onto the recording sheet, wherein the power source is controlled by the controller to output the DC transfer voltage and the transfer speed is set to a first velocity when the recording sheet has a first surface roughness, the power source is controlled by the controller to output the superimposed transfer voltage and the transfer speed is set to a second velocity that is slower than the first velocity when the recording sheet has a second surface roughness that is larger than the first surface roughness, and a peak voltage of the superimposed transfer voltage is larger than the DC transfer voltage.