Patent ID: 9128422
Filing Date: 2015-09-08
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive element, on which an electrostatic latent image is to be formed; an image carrier, onto which a toner image formed by causing toner to stick to the electrostatic latent image is to be transferred; an intermediate transfer driving roller that drives the image carrier; a primary transfer roller for transferring the toner image from the photosensitive element to the image carrier; a secondary transfer roller for performing secondary transfer of transferring the toner image from the image carrier to a medium; a bias applying unit that applies a secondary transfer bias necessary for the secondary transfer by applying a first bias and a second bias to the intermediate transfer driving roller and the secondary transfer roller, respectively, the first bias being lower than a minimum voltage at which discharge from the image carrier to the primary transfer roller can occur, the second bias being a voltage that is opposite in polarity from the first bias and that depends on the first bias; and a fixing unit that fixes the toner image onto the medium, onto which the toner image has been transferred, wherein the value of the second bias is the difference between the first bias applied to the intermediate transfer driving roller and a voltage to be applied for the secondary transfer.