Patent ID: 6801729
Filing Date: 2004-10-05
Classification: G03G

Abstract:
An image forming apparatus comprising:an image forming unit for forming an image on a sheet of at least two different sizes; a fuser for fixing the image over which the sheet with the image passes; a first temperature-measuring device disposed at a substantially center position in a longitudinal direction of the fuser; a second temperature-measuring device disposed at a non-center position in a longitudinal direction of the fuser; and a sheet conveying interval control for making the sheet conveying interval longer in a case that temperatures detected by said first and said second temperature-measuring devices represents that a temperature rise in end portions of said fuser occurs when a plurality of small size of sheets successively pass over said fuser, wherein, when a plurality of small size sheets successively pass over said fuser, even if temperatures detected by said first and said second temperature-measuring devices represents that substantially no temperature rise in end portion(s) of said fuser occurs, said sheet conveying interval control makes the sheet conveying interval longer.