Patent ID: 6459872
Filing Date: 2002-10-01
Classification: G03G

Abstract:
An image forming apparatus comprising:an image bearing body; charging means for charging said image bearing body; image forming means for forming an electrostatic image on the image bearing body charged by said charging means; developing means for developing the electrostatic image on said charging means using toner and recovering a residual toner from said image bearing body; transferring means for transferring the toner image on said image bearing body onto a transferring sheet; auxiliary means which comes in contact with said image bearing body after transfer, so that a voltage opposite in polarity to a charge given by said charging means is applied to the auxiliary means; cleaning means for cleaning said auxiliary means by producing such an electric field that toner goes from said auxiliary means to said image bearing body; and determining means for determining a time at which said cleaning means performs cleaning, wherein said determining means determines a cleaning time according to concentration information given by an image information signal.