Patent ID: 7664409
Filing Date: 2010-02-16
Classification: G03G

Abstract:
1. An image forming device comprising: an image carrier arranged to form an electrostatic latent image on a surface thereof; a developing device arranged to store two-component developer including toner and carrier and visualize the electrostatic latent image formed on the image carrier into a toner image; a transfer device arranged to transfer the toner image formed on the image carrier onto a paper; a fuser device arranged to fix the transferred toner image onto the paper; a control device arranged to control rotation of the image carrier and control each of the devices to form an image on the paper; a first driving device arranged to drive the devices other than the fuser device; a second driving device arranged to drive the fuser device separately from the other devices; and a concentration detecting device arranged to detect toner concentration of the two-component developer transported in the developing device, wherein the control device executes toner concentration control to control an operation of the developing device such that a value of detection output detected by the concentration detecting device falls within a predetermined range, and when controlling drive of the first driving device and the second driving device, the control device executes operation control that starts the drive of the first driving device before the drive of the second driving device.