Patent ID: 8238773
Filing Date: 2012-08-07
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image carrier on which a toner image is formed; an intermediate transfer member onto which the toner image formed on the image carrier is transferred; a primary transfer member disposed facing the image carrier via the intermediate transfer member, to transfer the toner image formed on the image carrier onto the intermediate transfer member; a power supply unit, operatively connected to the primary transfer member, a conductive member to sandwich a recording medium with the intermediate transfer member; a secondary transfer member, disposed facing the conductive member via the intermediate transfer member, to transfer the toner image formed on the intermediate transfer member onto the recording medium; a secondary-transfer electric-field forming member to form a secondary-transfer electric-field between the conductive member and the secondary transfer member and apply a secondary transfer current to the secondary transfer member or the conductive member; and a control device, operatively connected to the secondary-transfer electric-field forming member, to control the secondary transfer current applied to the secondary transfer member or the conductive member in accordance with the change in the primary transfer voltage in the sub-scanning direction detected by the power supply unit.