Ring shaped valve piston and its use in a blow moulding machine

Details Ring shaped valve piston and its use in a blow moulding machine Ring shaped valve piston and its use in a blow moulding machine

2011-06-28

2011-06-28

Gupta, Yogendra N (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

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

Including blowing medium supply means

C251S340000, C137S251100

Reexamination Certificate

active

07967599

ABSTRACT:
A blow molding machine having the valves integrated into the valve block (100) is disclosed. The valve pistons (110) form annular rings stacked vertically along the stretch rod (104) axis. The valve pistons activate by moving up/down along the stretch rod axis. The valve seat for each vertically stacked valve is formed radially around the stretch rod.

REFERENCES:
patent: 4770210 (1988-09-01), Neff et al.
patent: 6905326 (2005-06-01), Voth et al.
patent: 2003/0118686 (2003-06-01), Voth et al.
patent: 2008/0069914 (2008-03-01), Lemaistre
patent: 20018500 (2001-12-01), None
patent: 2872082 (2005-12-01), None

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