Intermediate transfer unit, image forming apparatus including same and method for manufacturing intermediate transfer unit

Abstract

An intermediate transfer unit includes a seamless intermediate transfer belt, a plurality of primary transfer members and a power supply line. On the intermediate transfer belt, toner images formed on a plurality of image carrying members are sequentially stacked. The primary transfer members are respectively arranged opposite the image carrying members via the intermediate transfer belt, and transfer the toner images formed on the image carrying members onto the intermediate transfer belt. The power supply line branches to at least two or more locations from a transfer voltage power supply which applies a primary transfer voltage to each of the primary transfer members to cause a primary transfer current to flow to each of the primary transfer members. The power supply line and each of the primary transfer members are connected via a high-voltage resistor unit that includes a plurality of resistors having different resistance values.