Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1978-04-25
1980-05-13
Reynolds, B. A.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
219121EM, 228184, 220DIG29, B23K 3102, B23K 1500
Patent
active
042030196
ABSTRACT:
Method for producing a container whose interior is substantially under atmospheric pressure, by a vacuum welding process in which the container is sealed by welding together under vacuum a plurality of wall components while maintaining an opening therein. The interior of the container is filled through the opening with a medium which is substantially under atmospheric pressure. The opening is made vacuum-tight by a first seal. The container interior is sealed from the outside by an additional seal in the form of a cover for the opening, which cover is welded to the container under vacuum. The cover borders on the outer face of the container in such a manner that the cover is welded to the container under vacuum along a line which extends at such a distance from the first seal that the sealing effect of the first seal is not adversely influenced.
REFERENCES:
patent: 2263021 (1941-11-01), Vecker
patent: 3719791 (1973-03-01), Peyrot
patent: 3818304 (1974-06-01), Hursen et al.
patent: 3857738 (1974-12-01), Brown
patent: 3939880 (1976-02-01), Zook et al.
patent: 4117300 (1978-09-01), Ricards
Richter Gerolf
Shanks Scott B.
Biotronik Mess- und Therapiegerate GmbH & Co.
George Keith E.
Reynolds B. A.
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