Apparatus for smooth surface gypsum fiberboard panels
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United States of America Patent
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-
May 11, 2004
Grant Date -
Oct 10, 2002
app pub date -
May 31, 2002
filing date -
May 17, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An improved method and apparatus for imparting a smooth surface to a gypsum fiber panels. The method involves imparting energy to the surface of the slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is an air lance including an air source such as a blower, a distribution manifold and a plurality of nozzles to direct the flow of air at the surface of the slurry. In operation, the air lance directs a flow of air against the surface of the slurry. The flow disrupts the slurry to a fraction of its total depth, thus dispersing clumps or flocs of crystals in the depth that would give the surface of the finished panel a rough surface if they were allowed to remain.
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