Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1976-02-13
1977-05-24
Lazarus, Richard B.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425DIG204, B29C 1707
Patent
active
040252760
ABSTRACT:
An apparatus for blow molding hollow articles from a heated parison of plastic with the apparatus including a blow mold having mold halves which are relatively movable and receive the parison therebetween. A mandrel is provided which is comprised of two halves each of which is carried by a respective mold half with the mandrel being movable between an extended position and a retracted position. A free end of each of the mandrel halves is adapted to engage a portion of the parison to hold same between the two mandrel halves thereby providing rigidity and support for puncturing of the parison by a blow needle which is reciprocably carried by one of the mandrel halves and is movable between an extended position and a retracted position.
REFERENCES:
patent: 3754851 (1973-08-01), Reilly et al.
Lazarus Richard B.
Phillips Petroleum Company
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