Method for using water hydraulics in a paper or board machine
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United States of America Patent
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May 25, 2004
Grant Date -
N/A
app pub date -
Aug 23, 2002
filing date -
Dec 3, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Water hydraulics are used in a paper or board machine, in particular in applications requiring lubrication and in the like in which an operating medium is subjected to pressure. A chemical which is used in the stock system (A) of the process is mixed with the water used in water hydraulics before the water is passed to a site of application (5) in order to raise the viscosity of the water and chemical mixture to a level required by the site of application (5). The water and chemical mixture is passed (3.sub.in) after that to the site of application (5) and circulated through the same at least once, after which said water and chemical mixture is recovered (2) and passed to the stock system (A) of the process as diluted to a suitable concentration.
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