IMAGE FORMING DEVICE AND PAPER CARRYING CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To prevent paper jamming at the time of double-sided color printing by stably supplying oil from a single oil supply mechanism to the surfaces of the upper and the lower heat rollers of a fixing device. SOLUTION: The fixing device is equipped with a upper heat roller 48 and a lower heat roller 50 for thermally fixing an image on paper passing by the contact rotation of the roller surfaces, and a single oil roller 52 for supplying oil for peeling paper to the rollers 48 and 50. In the case of carrying the paper B1 which goes via a reflux path 64 and to which back surface printing is performed to a processing unit, a carrying control part controls so that a carrying interval L2 equivalent to or above one rotation of the roller 50 is kept between the preceding paper A5 and the paper B1, whereby the roller 50 is uniformly coated with the oil from the roller 48 in a paper non-existing interval.