Apparatus for the continuous production of biaxially-stretched b

Details Apparatus for the continuous production of biaxially-stretched b Apparatus for the continuous production of biaxially-stretched b

1997-01-28

1999-04-06

Ryan, Patrick

Plastic article or earthenware shaping or treating: apparatus

Continuous filament forming or film casting means with...

2642095, 264565, 425 721, 4253261, 425392, B29C 4790

Patent

active

058914803

ABSTRACT:
A foil-blowing apparatus and start-up method utilizes switchable roller pairs and a seal in an upstream primary tube stretch to subdivide the interior of the primary tube into an upper chamber and a lower chamber, the lower chamber being in communication with a rising stretch of the primary tube with the tube in a heating chamber which brings the extruded tube to a foil-blowing temperature. The foil is blown by the pressure in the lower pressure chamber, at least during start up.

REFERENCES:
patent: 5756041 (1998-05-01), Arruda

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