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
2007-05-01
2007-05-01
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...
C425S564000, C425S566000
Reexamination Certificate
active
10993010
ABSTRACT:
A hot runner injection molding apparatus includes a manifold for transferring molten plastic into a channel to a mold gate. A valve pin extends at least partially through the channel and is reciprocally movable from a retracted position to an extended position to close the mold gate when the valve pin is in the extended position, and to open the mold gate when the valve pin is in the retracted position. A valve pin moving mechanism is coupled with the valve pin to directly move the valve pin to the extended position; and a resilient coupling is located between the valve pin and the valve pin moving mechanism for normally moving the valve pin to the retracted position.
REFERENCES:
patent: 3679341 (1972-07-01), Graybill et al.
patent: 4681528 (1987-07-01), Maruyama et al.
patent: 4923387 (1990-05-01), Gellert
patent: 5518389 (1996-05-01), Nonomura
patent: 6343921 (2002-02-01), Kazmer
patent: 2003/0151165 (2003-08-01), Colonico
patent: 2003/0180409 (2003-09-01), Kazmer
Heitbrink Tim
Ptak LaValle D.
Tech Mold, Inc.
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