Foil blowing apparatus for thermoplastic synthetic resins

Plastic article or earthenware shaping or treating: apparatus – Shaping orifice and downstream work contacting gaseous...

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4253261, B29C 4722

Patent

active

056246897

ABSTRACT:
A foil blowing head for a thermoplastic synthetic resin tube has a primary air guide juxtaposed with the blowing head portion defining the internal primary air outlet, also formed with passages for the secondary air and is axially shiftable on the discharge tube from which air is led from the foil balloon.

REFERENCES:
patent: 4105380 (1978-08-01), Zimmermann
patent: 4201527 (1980-05-01), Verner et al.
patent: 4846645 (1989-07-01), Cole
patent: 4955802 (1990-09-01), Halter et al.

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