Closed air circulation system
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United States of America Patent
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Oct 31, 2006
Grant Date -
Feb 26, 2004
app pub date -
Sep 19, 2001
filing date -
Sep 20, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a closed air circulation system for an apparatus used for sorting wood chips, containing chips in a variety of sizes and/or fines particles, in a wood chips processing chamber, in separate fractions by means of a gas flow, which is delivered from one or more nozzle chambers by way of a nozzle slit into the wood chips processing chamber and which applies an impulse action to the processing-bound wood chips sliding along an inclined support surface. Air is circulated from the wood chips processing chamber by way of a dedusting cyclone into said one or more nozzle chambers. The wood chips processing chamber is maintained at a negative pressure by regulating the volume of air removed from the chamber. A conduit extending between the wood chips processing chamber and the one or more nozzle chambers is open to the ambient atmosphere.
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