Process for the production of tubes of a molecularly oriented pl

Details Process for the production of tubes of a molecularly oriented pl Process for the production of tubes of a molecularly oriented pl

1982-08-05

1985-02-12

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264531, 264535, 264570, 264573, 425526, 425529, 4253871, B29C 1707

Patent

active

044990456

ABSTRACT:
A portion of a plastic tube (16) heated to a temperature at which stretching induces a molecular orientation, is clamped in a sleeve (14), a fluid under pressure is introduced into the portion of tube and the sleeve is moved along the portion of tube to cause its progressive radial expansion until it makes contact with a mould (1).

REFERENCES:
patent: 1871491 (1932-08-01), Barrett
patent: 3160130 (1964-12-01), Pesak
patent: 3288898 (1966-11-01), West
patent: 3849530 (1974-11-01), Wyeth et al.
patent: 3936260 (1976-02-01), Farrell
patent: 4098857 (1978-07-01), Farrell
patent: 4340344 (1982-07-01), Aston et al.
patent: 4363619 (1982-12-01), Farrell
patent: 4447199 (1984-05-01), Reed et al.

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