IMAGE FORMING APPARATUS

摘要

An image forming apparatus (1) includes an image forming section (12), an intermediate transfer belt (125), a drive roller (125A), a secondary transfer roller (210), a brush section (80), a cleaning device (70), a power supply device (81), and a ground portion (82). The brush section (80) is disposed at a location downstream of the secondary transfer roller (210) in a direction of travel of the intermediate transfer belt (125) and facing the drive roller (125A) with the intermediate transfer belt (125) in between. A potential difference is applied between the brush section (80) and the secondary transfer roller (210) by the power supply device (81) and the ground portion (82), so that an electric current having the same polarity as a normal charge polarity flows from the brush section (80) through the drive roller (125A) to the secondary transfer roller (210).

主权项

1. An image forming apparatus comprising:
an image forming section configured to form a toner image; an intermediate transfer belt configured to allow the toner image to be transferred to an outer peripheral surface thereof from the image forming section; a drive roller configured to drive the intermediate transfer belt into rotation; a transfer roller disposed at a location facing the drive roller with the intermediate transfer belt in between; a charging member disposed at a location downstream of the transfer roller in a direction of travel of the intermediate transfer belt and facing the drive roller with the intermediate transfer belt in between, the charging member being configured to charge residual toner remaining on the outer peripheral surface of the intermediate transfer belt to a normal charge polarity; a cleaning section disposed downstream of the charging member in the direction of travel of the intermediate transfer belt and configured to electrically attract the residual toner remaining on the outer peripheral surface of the intermediate transfer belt to collect the residual toner; and a potential difference applying section configured to apply a potential difference between the charging member and the transfer roller to generate an electric current flowing from the charging member through the drive roller to the transfer roller and having the same polarity as the normal charge polarity.