Manufacture of metal tubes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 14, 1992
Issued Date -
N/A
app pub date -
Apr 11, 1991
filing date -
Apr 18, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for forming metal tubes is shown in which a metal strip 2 is passed through the apparatus and is formed by a combination of rollers 17, 17', 19, and dies 15, 24 into a shape defining a tube. Prior to the completion of the formation of the metal strip 2 into a shape defining a tube, a brazing wire 1 is supplied through rollers 8 onto the metal strip 2 between two edge portions thereof to be bonded together. The edge portions are bonded together by means of a frictional wheel 27 rotating at high speed.
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