Method of making corrugated reinforced thermoplastic pipe

Details Method of making corrugated reinforced thermoplastic pipe Method of making corrugated reinforced thermoplastic pipe

1981-06-16

1983-03-22

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

264173, 264176R, 264568, D01D 520

Patent

active

043775454

ABSTRACT:
Disclosed is a method of making corrugated reinforced thermoplastic pipe having interior and exterior tubes with corrugations therebetween, comprising extruding through a pipe forming die, the interior and exterior tubes of a pipe at one linear rate while extruding a third skin or ribbon at a faster linear rate whereby the third skin buckles between the interior and exterior tubes to create corrugations in the space between the two tubes.

REFERENCES:
patent: 3372920 (1968-03-01), Corbett et al.
patent: 3379221 (1968-04-01), Harry et al.
patent: 3538209 (1970-11-01), Hegler
patent: 3561493 (1971-02-01), Maillard
patent: 4125585 (1978-11-01), Rosenbaum
patent: 4196464 (1980-04-01), Russell

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