Method and apparatus for tube extrusion

Details Method and apparatus for tube extrusion Method and apparatus for tube extrusion

1978-05-22

1983-03-15

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264565, 264566, 425 73, 4253261, 425327, 425388, B29C 1700

Patent

active

043766218

ABSTRACT:
Reduced breakage and reduced internal gas pressure is achieved in the trapped bubble process for the preparation of film by applying vacuum to the region of the tube where the bubble starts to form.

REFERENCES:
patent: 2452080 (1948-10-01), Stephenson
patent: 3051605 (1962-08-01), Stannard
patent: 3258516 (1966-06-01), Ewing, Jr.
patent: 3363035 (1968-01-01), Niiho et al.
patent: 3370112 (1968-02-01), Wray
patent: 3544667 (1970-12-01), Ebert et al.
patent: 3619442 (1971-11-01), Henderson

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