| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently heat an glass article in a hollow part of a heating element while maintaining heat insulation effect. SOLUTION: In the glass article, a molded heat insulating material is arranged on the outer circumference of a hollow heating element, and further, an induction coil is arranged in the surrounding of the heat insulating material, and by induction heating the above heating element by the induction coil, the heating element is heated in the hollow part. Here, an electric insulating part is formed in the above insulating material in a direction crossing the direction of the current induced on the surface of the molded heat insulating material by the magnetic field generated by the above induction coil. COPYRIGHT: (C)2004,JPO
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