Patent ID: 9323181
Filing Date: 2016-04-26
CPC Classification: G03G

Claim Text:
1. An image forming apparatus in which a toner image formed on an image carrying member is transferred to a recording medium using a transfer belt that is stretched over a plurality of rollers to be circumferentially moved, comprising: a transfer roller that is rotatably provided and brought into pressure-contact to the transfer belt; a transfer power supply that applies a voltage to the transfer roller; a use situation measurement unit operable to measure a use situation of the transfer belt; and a transfer current control unit operable to control a transfer current that flows to the transfer roller by controlling the voltage applied from the transfer power supply to the transfer roller based on the use situation that is measured by the use situation measurement unit; wherein when a current value of the transfer current is changed from a standard value, the transfer current control unit is operable to control the voltage applied to the transfer roller such that the current value being changed of the transfer current is returned to the standard value after the transfer belt is circumferentially moved for a predetermined time period.