Patent ID: 9618883
Date: 2017-04-11
CPC Classifications: B65H,G03G

Claim:
1. An image forming apparatus comprising: a transfer unit configured to transfer a toner image onto a sheet; a fixing unit configured to fix the toner image onto the sheet, wherein the fixing unit includes a roller for conveying the sheet; and a control unit configured to control a rotational speed of the roller, wherein, in a first case where both a first loop amount of the sheet at one side in a width direction orthogonal to a sheet conveyance direction and a second loop amount of the sheet at the other side in a width direction are larger than a predetermined amount, or both the first loop amount of the sheet at the one side and the second loop amount of the sheet at the other side are smaller than the predetermined amount, the control unit switches the rotational speed of the roller between a first speed and a second speed that is different from the first speed, and wherein, in a second case where one of the first loop amount and the second loop amount is larger than the predetermined amount and the other of the first loop amount and the second loop amount is smaller than the predetermined amount, the control unit switches the rotational speed of the roller between a third speed and a fourth speed that is different from the third speed, wherein a difference of the third speed and the fourth speed is smaller than a difference of the first speed and the second speed.