Blow pin assembly with venting means

Details Blow pin assembly with venting means Blow pin assembly with venting means

1977-07-08

1978-10-31

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

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

Including blowing medium supply means

425812, B29D 2303

Patent

active

041232186

ABSTRACT:
A blow pin assembly for blowmolding plastic containers is disclosed. The assembly includes threads and an annular shoulder for molding a threaded bunghole with a flat sealing surface. The annular shoulder is provided by the bottom end of a cylindrical sleeve which fits over the main body of the blow pin. A narrow gap is defined between the main body and the sleeve, which provides a vent for air that otherwise gets captured between the parison and the main body.

REFERENCES:
patent: 3084382 (1963-04-01), Stuchbery
patent: 3354509 (1967-11-01), Ammondson
patent: 3358061 (1967-12-01), Gidge et al.
patent: 3937610 (1976-02-01), Farrell

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