Patent ID: 8787812
Filing Date: 2014-07-22
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a rotatable photosensitive member; a charging device for electrically charging said photosensitive member by being supplied with a superimposed charging bias of a DC voltage and an AC voltage; an exposure device for exposing to light the photosensitive member, charged by said charging device, to form an electrostatic image; a developing device for developing the electrostatic image with a toner; a transfer device for transferring a toner image from said photosensitive member onto a recording material by being supplied with a transfer bias; a cleaning blade for removing the toner remaining on said photosensitive member; a selecting device for selecting a mode, in which an operation is executed, from modes including at least an image forming mode in which an image corresponding to inputted image information is formed on the recording material and a recovery mode different from the image forming mode; and a controller for effecting, when execution of the operation in the recovery mode is selected by said selecting means, control so that a band-like toner image is formed on said photosensitive member in a certain amount and in a certain area and then is supplied to said cleaning blade by changing the transfer bias applied to said transfer device and so that a peak-to-peak voltage of the AC voltage larger than that of the AC voltage applied to said charging device in the operation in the image forming mode is applied to said charging device in a predetermined period after a leading end of the band-like toner image subjected to removal by said cleaning blade passes through said charging device.