Process for de-airing material in an extruder that includes a vent block
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United States of America Patent
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Aug 18, 2015
Grant Date -
Jun 7, 2012
app pub date -
Nov 29, 2011
filing date -
Dec 1, 2010
priority date (Note) -
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Abstract
An extruder for feeding material and for removing gas from the fed material. The extruder includes a vent block positioned between a first and second auger. The vent block including a vent cavity having a feed end and an exit end, an inner feed ring that partially extends into said vent cavity at the feed end of the vent cavity, and a screw element rotatably positioned in the vent cavity. A front portion of the outer ring is longitudinally aligned with or overlapping the front end of the inner feed ring. The outer ring forms at least one gap or opening at or adjacent the feed end of the vent cavity to enable gas to flow out of the vent cavity as material is moved though the vent cavity from the feed end to the exit end by the screw element.
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