| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that when fusing and mutually bonding a casing main body 2 and a lid by joining the casing main body 2 and the lid together, setting heating wire 61/62 into a groove 21 which is a joint part thereof, and electrifying the heating wire 61/62, air-tightness is not ensured due to the occurrence of a part where the lid and the a casing main body 2 are not welded when the heating wire 61/62 is floated up from the groove 21 before setting the lid onto the casing main body 2. SOLUTION: An intermediate part 61a/62a of a resistor wire is molded into straight line, and a portion of the groove 21 corresponding to the intermediate part 61a/62a is molded into curved line. When the heating wire 61 is set into the groove 21, the heating wire 61 is bent and pressed onto the inner wall of the groove 21, so that the resistor wire 61/62 is not floated up from the groove 21 with a frictional force. COPYRIGHT: (C)2005,JPO&NCIPI
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