Apparatus for the preparation of parisons

Details Apparatus for the preparation of parisons Apparatus for the preparation of parisons

1975-12-17

1977-09-13

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Utilizing laminated parison

425534, B29D 2303

Patent

active

040478742

ABSTRACT:
Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.

REFERENCES:
patent: 3077287 (1963-02-01), White
patent: 3337666 (1967-08-01), Wilkins
patent: 3717544 (1973-02-01), Valyi
patent: 3737259 (1973-06-01), Valyi
patent: 3819314 (1974-06-01), Marcus
patent: 3878282 (1975-04-01), Bonis et al.
patent: 3886247 (1975-05-01), Edwards

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