Method of and apparatus for the production of thermoplastic cont

Details Method of and apparatus for the production of thermoplastic cont Method of and apparatus for the production of thermoplastic cont

1977-03-30

1978-04-25

Husar, Francis S.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 98, 425525, B29C 1707

Patent

active

040863140

ABSTRACT:
Plastic containers, especially of large volume, for the storage, dispensing and transportation of liquids such as milk are formed by blow-molding unitarily with handgrips and recesses permitting the engagement thereof. According to the disclosure, a parison is extruded into a blow mold and before the blow mold is closed on the parison, a lower portion thereof is distended outwardly with the outwardly expanded or distended portions being gripped by members which draw these portions laterally outwardly into auxiliary molding devices designed to shape these portions into the handgrips upon closure of the mold and the blowing of the parison to conform to the contours thereof. Thus, the grip portions are formed from extra material extruded from the extrusion head forming the parison.

REFERENCES:
patent: 3564087 (1971-02-01), Ruekberg
patent: 3983199 (1976-09-01), Uhlig

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