Patent ID: 9720355
Date: 2017-08-01
CPC Classifications: G03G

Claim:
1. An image forming apparatus, comprising: an image bearer including a plurality of layers; a transfer member to form a transfer nip between the image bearer and the transfer member; and a power source to output a transfer bias to transfer a toner image from the image bearer onto a recording sheet in the transfer nip, the transfer bias being generated by an AC voltage and a DC voltage that are superimposed, wherein a polarity of the transfer bias alternates between negative and positive, wherein the transfer bias alternates between a transfer-side bias that causes the toner image to electrostatically move from the image bearer to the recording sheet, and an opposite-side bias different from the transfer-side bias, and a duty ratio of a time period, during which the opposite-side bias is output, relative to one cycle of a waveform, is greater than 70%.