Extrusion apparatus for making multilayer articles
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United States of America Patent
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Jul 31, 2012
Grant Date -
Aug 12, 2010
app pub date -
Apr 29, 2010
filing date -
Jan 27, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In certain aspects of the invention, an extrusion apparatus for making a multilayer article includes multiple discs, each of which has at least one passageway configured to permit fluid flow therethrough in a flow direction. At least one of the discs includes a cone shaped portion extending substantially parallel to the flow direction.
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