Weld seam cover on the inside of sheet metal tubes
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United States of America Patent
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-
Mar 22, 1994
Grant Date -
N/A
app pub date -
Dec 14, 1992
filing date -
Dec 17, 1991
priority date (Note) -
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status (Latency Note)
Importance
Abstract
On the welding arm of a welding machine is mounted a coaxial application pipe with removable transport means and an application nozzle. Into this application pipe is fed a block-shaped hot-melt mass, in the direction opposite the advance direction of the sheet metal tube, guided in direction (V) of the application tube, melted in the area of a narrowing heater, passed through a supply tube to the application nozzle and applied or sprayed as a hot-melt strip to the inside of the longitudinal weld seam of sheet metal tubes. The application of a hot-melt strip is suitable in particular for the protection of the longitudinal seam of a tin-plated can shell.
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