E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
E04C 2/26 (2006.01) B28B 11/08 (2006.01) B28B 11/10 (2006.01) B28B 19/00 (2006.01) B32B 13/08 (2006.01) E04C 2/04 (2006.01)
Patent
CA 2052718
IN THE ABSTRACT A method for making gypsum wall board in which during the production of the board pressure is applied to a portion or all of the board surface to reshape, compress and densify the gypsum core to change the shape or contour the face surface of the gypsum board. The pressure must be applied in a systematic fashion to avoid creating lateral shifting or shear stresses in the gypsum core or between the core and paper surface to avoid destroying the paper to gypsum core bond. The method can be used to produce a cross taper at the cut ends of the board, to produce a decoratively shaped board surface and to densify the entire board core for special gypsum board applications.
Domtar Inc.
Macrae & Co.
LandOfFree
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