| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat heater that can raise an impressed voltage, and capable of increasing a heating volume per unit area. SOLUTION: The flat heater comprises a plurality of laminated insulation sheets 21, 22, 23 and 24, and a plurality of heater members 11, 12 and 13 interposed between the insulation sheets 21, 22, 23 and 24 and superposed at intervals. An area in which the heater members can be arranged can be increased by superposing the heater members several times over the insulation sheets. There can also be arranged heater members longer than prior art ones in which the heater members are arrayed in a single layer. Further, since the heater members with the same standards as the single-layer flat heaters can be adopted, an allowable current value is unchanged, and the heating volume can be increased. COPYRIGHT: (C)2005,JPO&NCIPI
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