Patent ID: 6810220
Filing Date: 2004-10-26
Classification: G03G

Abstract:
An image forming apparatus comprising:a fixing device including a fixing roller, a pressure roller pressed into contact with said fixing roller, and temperature detection means in contact with a non-paper-passage region on a surface of said fixing roller, said fixing roller incorporating first heating means whose heat distribution based on an axial direction of said fixing roller is set such that heat in a middle region thereof is higher than heat in opposite-end regions thereof, and second heating means whose heat distribution based on the axial direction of said fixing roller is set such that heat in opposite-end regions thereof is higher than heat in a middle region thereof; and a controller for controlling power supply to said first heating means and said second heating means, and wherein said controller starts power supply to said first heating means and said second heating means to start warm-up of said fixing device, and cuts off power supply to said first heating means for a predetermined period of time during said warm-up.