Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2008-03-11
2008-03-11
Heitbrink, Jill L. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C425S548000
Reexamination Certificate
active
10994069
ABSTRACT:
A method and apparatus for improving the quality of molded parts in a molding system having a valve stem and a valve gate. The valve stem is movable between a fully retracted position where the gate is fully open to a fully forward position where the gate is fully closed and into an intermediate position where the gate remains closed but the valve stem is displaced from the gate so heat transfer through the valve stem and into the gate region is minimized.
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International Search Report for PCT/CA2005/001543, dated Jan. 26, 2006, three pages, related to the above-identified US patent application.
Heitbrink Jill L.
Husky Injection Molding Systems Ltd.
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