Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With accumulator – trap chamber – or serially arranged valves...
Reexamination Certificate
2005-04-26
2005-04-26
Heitbrink, Jill L. (Department: 1732)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With accumulator, trap chamber, or serially arranged valves...
C264S328190, C425S559000, C425S261000, C425S264000
Reexamination Certificate
active
06884061
ABSTRACT:
An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is located at a forward end of the piston to selectively block communication between a recess, which is provided in an outer wall of the piston adjacent the valve, and a melt chamber of the nozzle. Movement of the injection piston from the retracted position to the extended position causes the valve to close so that the predetermined volume of melt located below the valve is forced into the mold cavity, when the valve gate pin opens the mold gate.
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Okamura Isao
Olaru George
Heitbrink Jill L.
Mold-Masters Limited
Sterne Kessler Goldstein and Fox P.L.L.C.
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