Corrugated tubing
AssigneeBoa AG Luzern
InventorMarco Dreyer
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Abstract
A method of producing a corrugated flexible tube wherein a corrugated profiled strip having multiple corrugations is wound in a helical path such that its edges overlap and then the overlapped edges are tight welded together, preferably by electrical resistance welding, such that every welded corrugation of the resultant corrugated flexible tube is followed by at least one unwelded corrugation.
Claims8
A method of producing a helically corrugated flexible tube which comprises winding a corrugated profiled strip in a helical path such that the edges of said strip overlap and then welding together the overlapped edges, wherein every welded corrugation of the resultant corrugated flexible tube is followed by at least one unwelded corrugation and wherein the corrugations that are welded together have less stiffness than the other corrugations to thereby reduce the stiffness resulting from the overlapping of the edges of said strip.
As an article of manufacture, a helically corrugated flexible tube comprising a corrugated and helically wound strip having the edges of said strip overlapped and welded together wherein every welded corrugation thereof is followed by at least one unwelded corrugation and wherein the corrugations that are welded together have less stiffness than the other corrugations to thereby reduce the stiffness resulting from the overlapping of the edges of said strip.
Dependencies are inferred from the claim text.