Patent ID: 9535375
Date: 2017-01-03
CPC Classifications: G03G

Claim:
1. An image forming apparatus, comprising: an image bearing member to bear a toner image on a surface thereof; a nip forming member to contact the surface of the image bearing member to form a transfer nip therebetween; a power source to output a superimposed bias in which an alternating current (AC) bias is superimposed on a direct current (DC) bias, to the transfer nip to transfer the toner image from the image bearing member onto a recording medium interposed in the transfer nip; an information receiving device to receive information about a thickness of the recording medium delivered to the transfer nip; and a controller to control the power source, wherein the power source outputs a first superimposed bias to the transfer nip when the thickness of the recording medium is a first thickness and outputs a second superimposed bias to the transfer nip when the thickness of the recording medium is a second thickness that is greater than the first thickness, a peak-to-peak voltage of the AC bias of the second superimposed bias is greater than the peak-to-peak voltage of the AC bias of the first superimposed bias, and an absolute value of the DC bias of the second superimposed bias is less than the absolute value of the DC bias of the first superimposed bias.