Patent ID: 7778558
Filing Date: 2010-08-17
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member for bearing a toner image; a transfer member for electrically transferring the toner image from said image bearing member to a recording material at a transfer position; a recording material conveying member for bearing and conveying the recording material through the transfer position; an adhering member for charging the recording material at an adhering position upstream of the transfer position thereby electrically adhering the recording material to said recording material conveying member; a first power supply portion for supplying the adhering member with a voltage; a second power supply portion for supplying said transfer member with a voltage; and a controller for controlling the output of said first power supply portion, wherein, when a recording material is positioned astride the adhering position and the transfer position, said controller switches the output of said first power supply portion from a first output to a second output, and sets the second output based on a voltage-current relationship of the output of said second power supply portion.