| 摘要 |
A fixing unit for an image forming apparatus passes a recording medium with a unfixed toner image through between a pair of rotating bodies to fix the unfixed image to the recording medium. The fixing unit comprises a first heater for heating up one of the rotating bodies, a second heater for heating up the other of the rotating body, and a switching means for changing over a first state that the first heater and the second heater are serially connected to a power source and a second state that the first heater is connected to the power source, with the second heater being disconnected from the power source, wherein the relation: Q11/Q21>1/8 is satisfied, where Q11 denotes a heating value of the first heater in the first state per unit of time and Q21 denotes a heating value of the first heater in the second state per unit of time. |
