Method of and apparatus for filling inert gas in a can
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United States of America Patent
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Apr 24, 1990
Grant Date -
N/A
app pub date -
Jul 29, 1988
filing date -
Jan 31, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The lower edge of the peripheral wall of a can cap and the upper edge of a can barrel are spaced from each other by a gap therebetween. Streams of an inert gas from different groups of injector nozzles are injected, from outside of the gap, through the gap into the can cap and the can barrel, respectively, to replace air in the can cap and the can barrel with the injected gas. Then, the can barrel is fitted in to the can cap, and welded thereto to entrap the injected gas in the can barrel and the can cap.
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