Method for producing a helically wound pipe having a predetermin

Details Method for producing a helically wound pipe having a predetermin Method for producing a helically wound pipe having a predetermin

1979-03-26

1981-09-08

Combs, Ervin M.

Metal deforming

With indication of condition or position of work, product,...

Work drawn or extruded through die

29407, 72 50, 228 565, B21C 5100, B21C 3712

Patent

active

042877393

ABSTRACT:
A method for forming helically wound pipe from an elongated sheet of material having a longitudinal axis wherein markings are provided perpendicular to said longitudinal axis adjacent the edges of the elongated sheet of material at predetermined spaced intervals. The elongated sheet is fed in a direction parallel to its axis and wound helically to form a helically wound pipe having adjoining revolutions while maintaining the distance, parallel to said longitudinal axis, between successive indicia adjacent the edge of one revolution and the indicia adjacent the edge of the adjoining revolution constant.

REFERENCES:
patent: 2515365 (1950-07-01), Zublin
patent: 3140534 (1964-07-01), Messina
patent: 3417587 (1968-12-01), Campbell
patent: 3739459 (1973-06-01), Otani

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