Patent ID: 8600251
Filing Date: 2013-12-03
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member for bearing a toner image; a transfer section, which is pressed into contact with, and is separated from said image bearing member, for transferring a toner image borne on said image bearing member onto a recording medium at a time of being pressed into contact with said image bearing member; a transfer section drive section for driving said transfer section to rotate; a load member for varying a load onto said transfer section in conjunction with pressure contact and separation of said transfer section; and a control section configured to control said transfer section drive section to carry out a constant speed control, to drive said transfer section to rotate at a constant speed, and a constant torque control, to drive said transfer section to rotate at a constant torque, wherein said control section carries out said constant torque control under a state of pressure contact in which said transfer section is pressed into contact with said image bearing member, in accordance with a drive torque under constant speed, the drive torque that is detected when said constant speed control is carried out in a state of separation in which said transfer section is separated from said image bearing member, wherein said drive torque under constant speed is detected within a time frame in which said load member gives an amount of the load, onto said transfer section, during a time from said separation until said pressure contact.