| 摘要 |
PROBLEM TO BE SOLVED: To obtain excellent airtight sealing without generating cracks or splits on an outer surrounding container even when an envelop is made of a ceramic material, a combination of the ceramic material and a metal material, etc. SOLUTION: The parallel seam joining device, which performs seam joining by sending a current from a transformer for joining one or more pairs of electrodes for joining for rotating the envelop that contains predetermined circuit elements or electronic circuits and a lid member while applying pressure thereto, is characterized in that, to the primary winding of the transformer for joining, a high-frequency inverter for converting a direct-current voltage into a high-frequency alternating-current voltage is connected and that the high-frequency inverter performs a high-frequency conversion operation intermittently. COPYRIGHT: (C)2004,JPO |
