| 摘要 |
PROBLEM TO BE SOLVED: To maintain a condition that neither fogging caused by faulty electrification nor ghost caused by the soiling of an electrification auxiliary brush 12 and the faulty scraping of toner left after transfer by a contact electrifying member 2A are caused under any environment by improving the life and the electrifying property of the contact electrifying member 2A in accordance with environmental fluctuation in a process cartridge attachable/detachable system, contact electrifying system, transfer system and cleaner-less processing image forming device. SOLUTION: This device is provided with a control means 101 variably controlling a bias applying condition to the electrification auxiliary brush 12 at the time when an image is not formed with respect to the time when the image is formed in accordance with output from an environment means 102. |
