Patent ID: 8873984

Claim:
A fixing device comprising: a hollow, fixing rotary body rotatable in a predetermined direction of rotation; a pressing rotary body pressingly contacting an outer circumferential surface of the fixing rotary body to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed; a partition disposed inside the fixing rotary body to divide an interior of the fixing rotary body into a first compartment facing a heating span of the fixing rotary body spanning in a circumferential direction thereof and a second compartment facing a non-heating span of the fixing rotary body adjacent to the heating span; a heater disposed opposite and heating the heating span of the fixing rotary body; a power supply connected to the heater to supply power to the heater; a driver connected to the fixing rotary body to rotate the fixing rotary body; and a controller operatively connected to the power supply and the driver to control the power supply and the driver, the controller to perform at least one of a rotation speed control that controls the driver to rotate the fixing rotary body at an increased rotation speed and a power supply control that controls the power supply to supply an increased amount of power to the heater to decrease temperature differential between a temperature of the heating span of the fixing rotary body and a temperature of the non-heating span of the fixing rotary body.