Hard-edge wallboard

Details Hard-edge wallboard Hard-edge wallboard

1981-06-15

1982-10-19

Kimlin, Edward C.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Plaster board making

427284, 264 50, 4283124, 4283166, B32B 1300, B05D 500, B32B 326, B29H 720

Patent

active

043548857

ABSTRACT:
A method of making gypsum wallboard in which a portion of the conventional foamed gypsum slurry for forming the wallboard core is fed through a relatively high speed agitator, wherein a special addition of material is thoroughly admixed therewith to increase the fluidity without adversely affecting the density or setting characteristics and this portion of the slurry is then disposed along the edge portion of the wallboard being formed, whereby a hard-edge wallboard is produced under conditions including improved uniformity of core edge setting time, density and dimensions and reduced plug-ups of feed lines through which the core-edge material is fed.

REFERENCES:
patent: 2985219 (1961-05-01), Summerfield
patent: 4279673 (1981-07-01), White

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