Method and apparatus for use with a twin-wire press
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United States of America Patent
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Jan 13, 2009
Grant Date -
Nov 16, 2006
app pub date -
May 5, 2004
filing date -
May 6, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for dewatering a fiber suspension in a twin-wire press is disclosed including feeding the fiber suspension to an inlet end of an elongated dewatering space, dewatering the fiber suspension during displacement of the endless lower and upper wires which form the elongated dewatering space by flowing filtrate through the endless lower and upper wires, collecting the filtrate in outlet boxes, and adjusting the pressure differential between the elongated dewatering space and each of the upper and lower outlet boxes by controlling the counter-pressure applied to the filtrate flow on both sides of the endless upper and lower wires directly adjacent the inlet end of the dewatering space. A twin-wire press is also disclosed therein.
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