Patent ID: 9201362
Filing Date: 2015-12-01
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a fixing roller to fix a toner on a printing medium; a heater to heat the fixing roller; an alternating current (AC) power source to supply an AC electric power to the heater; AC power supply lines between the AC power source and the heater; a power converting part to convert the AC electric power from the AC power source to a power for heating of the heater and to apply the power converted from the AC power source to the heater; and an auxiliary power supplier to supply a driving power to the power converting part, wherein the power converting part is disposed on the AC power supply lines between the AC power source and the heater, and selectively interrupts the applying of the power converted from the AC power source to the heater according to whether the driving power is received by the power converting part, with the absence of the driving power indicating overheating of the fixing roller.