Blow molding apparatus

Details Blow molding apparatus Blow molding apparatus

1988-02-22

1989-01-24

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

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

Including blowing medium supply means

264523, B29C 4960

Patent

active

047998768

ABSTRACT:
Blow molding of a parison with a blow needle is aided by the use of a sealing member which includes at least one projection which completely surrounds the blow needle. During inflation of the parison, the projections come into sealing contact with the exterior surface thereof so as to effectively prevent leakage of blow gas from the interior of the parison around the blow needle.

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patent: 4032278 (1977-06-01), Kuenzig et al.
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patent: 4234299 (1980-11-01), Kuenzig et al.
patent: 4266927 (1981-05-01), Gilbert et al.
patent: 4574965 (1986-03-01), Meierhoefer

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