Patent ID: 7251426

Claim:
An image forming apparatus comprising: a transferring device which transfers an unfixed image borne on an image bearing member to a recording material; a fixing device which is changeable in a recording material conveying speed thereof and which fixes the transferred unfixed image on the recording material; a discharging device which is changeable in a recording material conveying speed thereof and which discharges the recording material on which the image has been fixed by said fixing device; a loop detecting device which detects a loop state of the recording material between said transferring device and said fixing device; and controlling means which changes over the recording material conveying speed of said fixing device on the basis of a detection of said loop detecting device and controls the loop of the recording material so as to be maintained within a predetermined range, wherein said controlling means controls the recording material conveying speed of said discharging device so as to become equal to the recording material conveying speed of said fixing device after the recording material has passed said transferring device.