Method of manufacture of glass reinforced gypsum board and apparatus therefor
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United States of America Patent
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-
Apr 12, 2005
Grant Date -
Dec 12, 2002
app pub date -
Nov 30, 2001
filing date -
Jun 6, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Gypsum board having inorganic fiber, preferably glass fiber, preferably glass fiber, includes providing face sheets which have been completely impregnated with a gypsum slurry so as to penetrate through said random interstices between the inorganic fibers and to thereby cover the board surfaces with gypsum slurry. The gypsum board product is formed by passing the wet gypsum board through a board forming station having double forming plates, an upper forming plate having at least a portion thereof being set at a predetermined angle relative to a lower forming plate and having a separation between the forming plates defining a predetermined dimension substantially equal to the desired thickness of the manufactured gypsum board product. The method provides a multilayer gypsum board having a polymeric compound added to unset gypsum so as to provide a gypsum board ready for finishing.
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