| 摘要 |
The present invention provides a fixing device that excels in thermal conversion efficiency, compared with an induction-type fixing device. In this fixing device, a peripheral surface of a roller facing an induction coil has concavities and convexities with edges. Where the induction coil is inserted into a core bar, the concavities and convexities are formed inside the core bar. Where the induction coil is located outside the roller, the concavities and convexities are formed on the outer periphery of the core bar.
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