Apparatus for blow molding

Details Apparatus for blow molding Apparatus for blow molding

2008-03-22

2010-10-26

Davis, Robert B (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

C425S525000, C425S532000, C425S535000

Reexamination Certificate

active

07819649

ABSTRACT:
A blow molding apparatus wherein an extruded tubular parison is pressurized to form a molded article, comprises a blow pin for introducing pressurized fluid into the parison, an actuator for advancing and retracting the blow pin and adjusting means for determining the orientation of the actuator to achieve substantial parallelism of a blow pin shaft to which the blow pin is attached and a centerline of the opening through a forming die through which the blow pin shaft passes and to achieve substantial parallelism of a sealing element of the blow pin with a plane transverse to the opening of the parison.

REFERENCES:
patent: 3907475 (1975-09-01), Bowers
patent: 4234299 (1980-11-01), Kuenzig et al.
patent: 4954071 (1990-09-01), Austin
patent: 5256055 (1993-10-01), Morris
patent: 5603966 (1997-02-01), Morris et al.
patent: 5629032 (1997-05-01), Pennino
patent: 5656214 (1997-08-01), Uchiyama et al.
patent: 5971741 (1999-10-01), Weber
patent: 6824732 (2004-11-01), Cobiski et al.

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