Tube treating and method

Details Tube treating and method Tube treating and method

1974-08-19

1976-02-17

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264209, 264230, 264294, 264322, B29D 2301

Patent

active

039392430

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: 1886935 (1932-11-01), Bohle
patent: 2922194 (1960-01-01), Lampard
patent: 3050786 (1962-08-01), St. John et al.
patent: 3551545 (1970-12-01), Overdiep
patent: 3623273 (1972-01-01), Savickas

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