Method and apparatus for distributing melt in a multi-level...

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface

Reexamination Certificate

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C425S564000, C425S572000

Reexamination Certificate

active

07122145

ABSTRACT:
An improved melt distribution system and method is provided for a multi-level stack mold having three or more moving platens. The injection machine communicates with a bifurcated sprue bar for providing pressurized melt through the first moving platen to a central distribution manifold in the second moving platen. From the central distribution manifold, the flow of pressurized melt is distributed to the first and third platens for transfer to a plurality of mold cavities.

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G. Bagusche—“HinterspritzenUnd Balancieren Eines Etaggen-Werkzeugs,”Kunststoffe 2376: 176, Carl Hauser Verlag (Feb. 1, 1995).
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Product description of Yudo “Stackmold” from http://www.yudo.co.kr/html/2-tec/sub1.asp, dated May 22, 2003.

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