Headbox turbulence generator
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United States of America Patent
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-
Aug 8, 2000
Grant Date -
N/A
app pub date -
Jul 6, 1998
filing date -
Jul 4, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A headbox of a paper or board machine having an inlet, a distributor for feeding stock suspension to be distributed over the machine width into the inlet. A turbulence generator downstream of the distributor has a hydraulic diameter of less than 17 mm in the downstream end region. The hydraulic diameter is the diameter of individual channels through the turbulence generator. The turbulence generator has channels or plates that define several channels, each in accordance with the desired hydraulic diameter. Dimensions of the hydraulic diameter are disclosed. The turbulence generator has lands at the downstream end. The land area ratio is disclosed. A nozzle or the like downstream of the turbulence generator introduces the stock suspension over the machine width to a wire or wires of the next section.
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