Patents Assigned to Lousiana Pacific Corporation
  • Method of manufacturing fiber gypsum board
    Patent number: 5342566
    Abstract: A method and apparatus for producing gypsum board. The method includes the steps of mixing a predetermined amount of fibers, absorbent, and water to form a mixture of wetted, loose fibers, mixing the wetted fibers with predetermined amount of dry calcined gypsum, forming the mixture into a matt having a substantially uniform consistency and compressing the matt to form a board composed of bonded fibers and gypsum. The resulting board has a smooth exterior and can be a homogeneous or a multilayer board.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: August 30, 1994
    Assignees: Carl Schenck AG, Lousiana Pacific Corporation
    Inventors: Karl K. Schafer, Gerhard M. Melzer, Jorg Scriba, Suda G. Bhagwat, James Eisses