Method of making a curved pipe

Details Method of making a curved pipe Method of making a curved pipe

1990-05-29

1991-05-14

Combs, E. Michael

Metal working

Method of mechanical manufacture

Gas and water specific plumbing component making

72 50, B21D 5300, B21C 3712

Patent

active

050144243

ABSTRACT:
A bent pipe is made of a metal strip having one edge in a straight line and the other edge in a curved line by winding it helically. A double fold and a single fold are formed along the straight edge and the curved edge, respectively. Then the metal strip is wound helically so that the narrow portions will be in juxtaposition with one another.

REFERENCES:
patent: 119621 (1871-10-01), Leas et al.
patent: 4704885 (1987-11-01), Nakajima

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