Patent ID: 9256187
Filing Date: 2016-02-09
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: an image bearing member on which a toner image is formed; an intermediate transfer member that is endless and rotatable, the intermediate transfer member being disposed in contact with the image bearing member and forming a primary transfer region between the intermediate transfer member and the image bearing member, the toner image being primarily transferred, at the primary transfer region, to the intermediate transfer member; a transfer member disposed in contact with the intermediate transfer member and forming a secondary transfer region between the transfer member and the intermediate transfer member; a first power supply unit connected to the transfer member; a charging member provided downstream of the secondary transfer region in a rotating direction of the intermediate transfer member and upstream of the primary transfer region to charge a residual toner remaining on the intermediate transfer member; a second power supply unit connected to the charging member; and a control unit controlling the first power supply unit and the second power supply unit, wherein the control unit controls a current supplied to the primary transfer region by controlling both the first power supply unit and the second power supply unit.