Tube treating and apparatus therefor

Details Tube treating and apparatus therefor Tube treating and apparatus therefor

1976-05-26

1977-06-07

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

425403, 264294, 264296, 72274, 72367, B29C 1700

Patent

active

040280373

ABSTRACT:
Synthetic resinous thermoplastic tubing is reduced radially in diameter with minimal increase in length by passing the tube through a plurality of successively smaller dies wherein a minor portion of the die moves relative to a major portion of the die during the reduction step. Plastic tube is obtained which has a tendency to expand radially with a minimal alteration in its length. Such tubing is particularly suitable for lining of pipe.

REFERENCES:
patent: 3482007 (1969-12-01), Routh
patent: 3707086 (1972-12-01), Berg

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