Patent ID: 6947680

Claim:
An image forming apparatus comprising: an image bearing member; a charger to which a charging bias in which a DC voltage is superimposed on an AC voltage is applied to charge the image bearing member; electrostatic image fanning means for forming an electrostatic image on the image bearing member; a plurality of developing devices for developing the electrostatic image on the image bearing member with a developer; a moving member holding the plurality of developing devices and selectively moving a predetermined developing device to a developing position; an intermediate transfer member onto which a developer image is primarily transferred from the image bearing member, the developer image on the intermediate transfer member being secondarily transferred onto a recording material; and speed reducing means for reducing a speed of the intermediate transfer member according to a type of the recording material after completion of the primary transfer, wherein in a state in which the speed of the intermediate transfer member is reduced, all of the developing devices are retreated to positions other than the developing position, wherein at least the AC voltage of the charging bias applied to said charger is turned off.