| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device constituted so that normally charged toner attached to a transfer roller can be recovered and eliminated at the prerotation processing time of a printing action and the back surface of a recording paper is prevented from being soiled at the time of the printing action. SOLUTION: At the prerotation processing time of the printing action, a negative bias voltage being reverse to the bias voltage at a normal time is applied on the transfer roller 16. Thus, the normally charged toner attached to the roller 16 is recovered to a developing unit 15 from a photoreceptor drum 12 after it is recovered to the drum 12 from the roller 16. Therefore, the back surface of the recording paper is prevented from being soiled by the toner attached to the roller 16 at the time of the subsequent printing action. |
