Compact extruder with multiple parallel screws having a variable pitch arrangement
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Jun 6, 2000
filing date -
Jun 11, 1999
priority date (Note) -
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Abstract
A compact extruder with multiple parallel screws having a variable pitch arrangement, includes an outer casing which has at least two chambers that contain at least two screws which allow material to flow from one chamber to the other chamber through a passage, and that present a feed inlet for the material to be treated and an outlet for the material; each chamber has at least one pair of housings for the corresponding pair of screws which engage with one another, each screw presenting a long-pitch portion and a short-pitch portion.
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