Electric heating – Metal heating – By arc
Patent
1982-08-16
1985-02-26
Albritton, C. L.
Electric heating
Metal heating
By arc
B23K 2700
Patent
active
045019487
ABSTRACT:
A method and apparatus for forming a spiral tube from a length of metallic strip material wherein the strip is fed through a closed tube forming die operative to form the strip into a spirally wound tube having its longitudinal edges in juxtaposed relation. Driven torque wheels carried on one or more support carriages downstream from the forming die are operative to engage the outer peripheral surface of the tube to prevent springback and enable selective control of the relation between juxtaposed edges of the strip as it is passed longitudinally through a welding station during which the juxtaposed edges are welded to form a continuous leak-proof seam. The metallic strip may be planar or have longitudinal flutes formed therealong.
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Peszeszer Endre F.
Yampolsky Jack S.
Albritton C. L.
GA Technologies Inc.
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