Patent ID: 9207586
Filing Date: 2015-12-08
Classification: G03G

Abstract:
1. An image forming device comprising: a plurality of image forming units for forming developing agent images; an intermediate transfer member to which the developing agent images are transferred from selected ones of the image forming units; a transfer member for transferring the developing agent images from the intermediate transfer member to a recording medium to form an image on the recording medium; and a voltage supply unit for supplying a voltage to the transfer member, wherein the voltage supply unit varies the voltage supplied to the transfer member, either before or after the developing agent images are transferred from the intermediate transfer member to the recording medium or both before and after the developing agent images are transferred from the intermediate transfer member to the recording medium, responsive to the number or disposition of the selected image forming units, and wherein the voltage supply unit supplies the transfer member with a voltage of a normal polarity when more than one of the image forming units are selected, and supplies the transfer member with a voltage of a reverse polarity, opposite to the normal polarity, when only one of the image forming units is selected.