| 摘要 |
PURPOSE: To provide an image forming device capable of obtaining a desired image by optimally controlling a process condition even in the case environmental fluctuation and secular fluctuation are caused. CONSTITUTION: A developed image form detection is formed on an intermediate transfer belt 10 and its transferred on a paper transfer bias roller 14, and the transferred developed image is detected by an optical sensor 22 so as to control bias impressed on the roller 14 by a power source device 42. Then, the transfer is performed by leaving a space between the intermediate transfer belt and the roller, or forming the developed image transfer part of the roller of material having the same characteristic as the transfer paper so that the transfer on the roller 14 may be performed in a state where it is influenced by humidity similarly to the transfer on transfer paper. |
