Method for making helically wound surface-coated tubes, and appa

Details Method for making helically wound surface-coated tubes, and appa Method for making helically wound surface-coated tubes, and appa

1980-03-20

1983-06-14

Larson, Lowell A.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

29435, 291573AH, 29455LM, 29456, 72145, 156162, 156195, B22D 11126

Patent

active

043874983

ABSTRACT:
A method of making a multi-layer tube includes the steps of pre-heating two elongate metal strips and bending each to a substantially arcuate curvature. Each strip is then wound helically with abutting edges, one strip being closely concentrically wound around and axially offset with respect to the other, so that the strips define a cylindrical tube. A synthetic resin is applied between the strips and to the interior of the tube during the winding step and is then pre-cured. Thereafter, a coating of the synthetic resin is applied to the exterior of the tube and then all of the synthetic resin is fully cured.

REFERENCES:
patent: 285576 (1983-09-01), Coas
patent: 1999151 (1935-04-01), Finley
patent: 2998339 (1961-08-01), Barnes et al.
patent: 3235941 (1966-02-01), Krotz
patent: 3750249 (1973-08-01), Brandon et al.

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