Patent ID: 6243559
Filing Date: 2001-06-05
Classification: G03G

Abstract:
A belt fixing device which comprises a fixing roller, a heating roller, an endless-type fixing belt stretched over the heating roller and the fixing roller, and a pressure roller facing the fixing roller via the fixing belt, and which fixes a toner image formed on a material to be transported between the pressure roller and the fixing belt,wherein the material is transported from the heating roller toward the fixing roller along the fixing belt, and brought to a fixing portion formed between the fixing belt and the pressure roller,wherein the fixing roller has no heat source,wherein the fixing roller presses a toner image formed surface of the material via the fixing belt in the fixing portion,wherein a heater for heating the fixing belt is disposed in both of the pressure roller and the heating roller,wherein a fixing pressure in a first fixing process portion where the pressure roller is in contact with the fixing belt without pressing the fixing roller via the fixing belt is set so low that no wrinkles appear on the material,wherein a fixing pressure in a second fixing process portion where the pressure roller presses the fixing roller via the fixing belt is set so that desired fixing can be performed, andwherein the fixing belt is arranged such that the material is separated from the fixing belt at an end of the second fixing process portion.