Headbox for the metered addition of a fluid medium into a suspension stream
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United States of America Patent
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May 10, 2005
Grant Date -
Jan 2, 2003
app pub date -
Aug 23, 2002
filing date -
Mar 2, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Headbox for one of a paper and cardboard machine includes at least one material suspension supply running a width of the machine. At least one turbulence producer has at least one conduit through which a material suspension flows. At least one metered addition point is located in the conduit for introducing a fluid medium. A headbox nozzle is located downstream from the at least one turbulence producer for delivering the material suspension. A portion of a flow resistance located downstream of the metered addition point is at least approximately 50% of a total flow resistance of the at least one conduit.
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