Patent ID: 8942589
Filing Date: 2015-01-27
Classification: G03G

Abstract:
1. A fixing apparatus for fixing a toner image on a recording material while conveying the recording material bearing the toner image at a nip portion, the fixing apparatus comprising: a cylindrical film; a heater configured to heat the cylindrical film, the heater being capable of changing a heat distribution in a generatrix direction of the cylindrical film; a pressure roller configured to form the nip portion between the cylindrical film and the pressure roller, the pressure roller including a region on which a diameter of the pressure roller is increased from a center portion toward an end portion; wherein the control unit controls the heater so that a ratio of an amount of heat generation at an end portion of the heater to an amount of heat generation at a center portion of the heater, during at least a part of a period from when a warm-up of the fixing apparatus is started until the recording material reaches the nip portion, in a case a temperature of the pressure roller, predicted by the prediction unit, is a first temperature when a warm-up of the fixing apparatus is started, is higher than the ratio in a case a temperature of the pressure roller, predicted by the prediction unit, is a second temperature, which is lower than the first temperature, when the warm-up of the fixing apparatus is started.