Patent ID: 6553192
Filing Date: 2003-04-22
Classification: G03G

Abstract:
An image forming apparatus comprising:a first image bearing member; first charging means for charging the first image bearing member, a vibration voltage being applied to the first charging means; a second image bearing member; and second charging means for charging the second image bearing member, a vibration voltage being applied to the second charging means, wherein said image forming apparatus is selectively operable in a first mode, in which toner images formed on the first image bearing member and the second image bearing member are transferred to a transfer medium, and in a second mode, in which a toner image formed on the second image bearing member is transferred to a transfer medium without forming a toner image on the first image bearing member, and wherein a voltage of the vibration voltage applied to the first charging means in the second mode is smaller than the voltage of the vibration voltage applied to the first changing means in the first mode.