Adhesive bonding and miscellaneous chemical manufacture – Plaster board making apparatus
Reexamination Certificate
2008-09-25
2010-10-12
Fortuna, José A (Department: 1791)
Adhesive bonding and miscellaneous chemical manufacture
Plaster board making apparatus
C425S110000, C425S115000, C425S130000, C425S224000
Reexamination Certificate
active
07811413
ABSTRACT:
A multilayer gypsum board forming device, and a gypsum additive delivery system in which additives are delivered to one or more layers of a multi layered gypsum board panels, including engineered polymers, includes at least one additive assembly connected in-line with a first gypsum delivery receptacle for providing an additive fluid feed into the stream of a first gypsum slurry being transported through said first gypsum delivery receptacle for homogenously adding an additive to the first gypsum slurry, and a second gypsum delivery receptacle transporting a second gypsum slurry, in fluid communication with the mixer providing the first gypsum slurry, having a different set of characteristics from those of the first gypsum slurry. At least one outer surface including a polymeric compound or wax emulsion additive entrained therein essentially encases the core gypsum within two facing layers.
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Boydston Gerald D.
Chowing Matthew J
Fahey Michael P.
Hauber Robert J.
Hennis Mark E.
BPB Limited
Economou Vangelis
Economou IP Law
Fortuna José A
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