Patent ID: 9046830
Filing Date: 2015-06-02
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a rotatable image bearing member to bear a toner image on a surface thereof and rotate; a nip forming member to contact the surface of the image bearing member to form a transfer nip therebetween; and a power source to apply a transfer bias to the transfer nip to transfer the toner image from the image bearing member onto a recording medium interposed in the transfer nip, the transfer bias including a superimposed transfer bias in which an alternating current (AC) component is superimposed on a direct current (DC) component and a polarity of the superimposed transfer bias changes with time, wherein a phase difference between an AC voltage and an AC current output from the power source is equal to or less than 0.47 cycles when the superimposed transfer bias is output to the transfer nip in which the recording medium is interposed.