| 摘要 |
A fusing device for an electrophotographic image forming apparatus includes: a heat pipe having a tubular shape and containing a predetermined amount of working fluid, the heat pipe being hermetically sealed at both of its ends; a fusing roller surrounding the heat pipe; a heater spirally installed between the fusing roller and the heat pipe for generating heat; and a power connecting unit for transmitting external electric power to the heater. The heater includes: a resistive coil for generating heat using the electric power transmitted by the power connecting unit; an insulation layer covering the resistive coil; a metal layer surrounding the insulation layer; and leads for connecting the resistive coil to the power connecting unit at both ends of the heater. Accordingly, the fusing roller uses the heat pipe, thereby reducing warm-up time for initial operation. In addition, use of the leads acting as a heat sink secures the reliability of the heater in the fusing device
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