Patent ID: 9639031
Date: 2017-05-02
CPC Classifications: G03G

Claim:
1. An electrophotographic imaging apparatus, comprising: a voltage source; electrical ground; a shunt resistor having a relatively large resistance of at least 1 megohm; an intermediate transfer member (ITM) belt forming an endless loop having an inner surface and an outer surface, the ITM belt for receiving and transferring an image of toner; a transfer roll disposed along the outer surface of the ITM belt; and a drive roll and a backup roll, each of the drive roll and the backup roll being disposed along the inner surface of the ITM belt opposite to the transfer roll, the backup roll forming a transfer nip with the transfer roll and the drive roll being disposed upstream relative to the backup roll in a media feed direction, wherein the transfer roll is coupled to the voltage source having a predetermined voltage and each of the drive roll and the backup roll is coupled to said electrical ground, the drive roll being connected to said electrical ground via the shunt resistor thereby having a higher voltage potential closer to the predetermined voltage during use in comparison to the backup roll having a lower voltage potential closer to electrical ground such that a majority of toner of the image moves from the ITM belt toward the transfer roll nearer the backup roll than the drive roll.