Method for the preparation of plastic articles by extrusion and

Details Method for the preparation of plastic articles by extrusion and Method for the preparation of plastic articles by extrusion and

1974-06-30

1976-08-24

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 95, 264146, 264210R, 264237, 425 72R, 425326R, B29C 1704, B29D 2304

Patent

active

039767337

ABSTRACT:
Thin plastic tubes are prepared by extruding a heat plastified tube, stretching the tube over a gas bearing having a diameter greater than the diameter of the extruded tube, cooling the surface of the tube adjacent the gas bearing and passing the tube over a cooling mandrel having an outside diameter approximating the diameter of the gas bearing, thereby lowering the temperature of the tube below its heat plastifying temperature.

REFERENCES:
patent: 2708772 (1955-05-01), Moncrieff
patent: 2987767 (1961-06-01), Berry et al.
patent: 3090998 (1963-05-01), Heisterkamp et al.
patent: 3468995 (1969-09-01), Nelson
patent: 3560600 (1971-02-01), Gliniecki
patent: 3803278 (1974-04-01), Eberle et al.

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