Patent ID: 8588639
Filing Date: 2013-11-19
Classification: G03G

Abstract:
1. A fixing device comprising: a fixing rotative body configured to fix a toner image onto a recording medium by melting the toner image; a heat source configured to heat the fixing rotative body; a control part configured to control the heat source; and a temperature detecting part configured to detect a temperature of the fixing rotative body; wherein the control part is configured to conduct a printing temperature control which varies an ON ratio per unit time of the heat source based on a detection result of the temperature detecting part to maintain a printing target temperature in a printing state, to conduct a waiting temperature control which performs an ON/OFF control based on the detection result of the temperature detecting part to maintain a waiting target temperature in a waiting state after a printing operation ends, and to conduct a forcible ON control which forcibly turns on the heat source for a predetermined time before starting the ON/OFF control when the detection result of the temperature detecting part after the printing operation ends is lower than the waiting target temperature, and wherein the heat source turned on by the forcible ON control is turned off before the temperature of the fixing rotative body achieves the waiting target temperature.