Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Reexamination Certificate
2007-02-13
2007-02-13
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
C425S566000
Reexamination Certificate
active
10701111
ABSTRACT:
A method and apparatus for proportioning flow and controlling pressure to a gate of an injection mold. The invention decouples the control surface from the gate closure to reduce the required actuation force. Methods for estimating the pressure and flow rate entering the injection mold are included.
REFERENCES:
patent: 2531726 (1950-11-01), Durdin
patent: 3767339 (1973-10-01), Hunkar
patent: 4781572 (1988-11-01), Boring
patent: 4931234 (1990-06-01), Schad et al.
patent: 5830524 (1998-11-01), Braun
patent: 6042361 (2000-03-01), Murphy
Heitbrink Tim
Nutter & McClennen & Fish LLP
University of Massachusetts
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