Title: Method for producing a sealed container by vacuum welding

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.

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Inventors: Richter, Gerolf (Berlin, DE, US)
Shanks, Scott B. (Berlin, DE, US)

Application Number: 899784
Filing Date: 1978-04-25
Publication_date: 1980-05-13
Assignee: Biotronik Mess- und Therapiegerate GmbH & Co. (Berlin, DE)
Primary Class(es): 219/72 53/432, 53/478, 53/489, 219/121.35, 220/DIG29, 228/184
Other Classes:
US Patent Ref:

2263021	Nov, 1941	Vecker	220/DIG.
3719791	Mar, 1973	Peyrot	219/121.
3818304	Jun, 1974	Hursen et al.	128/419.
3857738	Dec, 1974	Brown	128/419.
3939880	Feb, 1976	Zook et al.	219/72.
4117300	Sep, 1978	Ricards	220/DIG.

Other Refs: 64852820506211668521146214

Aug, 1937	DE2.
Apr, 1971	FR
Apr, 1934	CH.
Mar, 1969	GB

Primary Examiner: Reynolds, B. A.
Assistant Examiner: George, Keith E.
Attorney: Spencer & Kaye