Patent ID: 8385759
Filing Date: 2013-02-26
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing belt that bears an image; an image creation unit that transfers the image on the image bearing belt; a first driving source; a driving roller, on which the image bearing belt is wound, that is rotationally driven by the first driving source and causes the image bearing belt to move; a transfer roller that has a concaved portion formed by cutting out part in a circumferential surface, forms a transfer nip by the circumferential surface of the transfer roller making contact with the image bearing belt, and transfers the image on the image bearing belt to a recording material that passes through the transfer nip; a second driving source that rotationally drives the transfer roller; a recording material type determination unit that determines the type of the recording material that passes through the transfer nip; and a control unit that controls a rotational frequency of the transfer roller to be a first rotational frequency when the recording material is not nipped by the transfer nip, and to be an second rotational frequency when the recording material is nipped by the transfer nip, the second rotational frequency being set based on the type of the recording material determined by the recording material type determination unit.