Patent · US Expired

Method of manufacturing fiber gypsum board

US5342566A · kind A · utility

73Cited by

38References

72Claims

0Family size

Assignees

Carl Schenck AG · DE
LOUISIANA-PACIFIC CORP. · US

Inventors

Karl K. Schafer · Gengenbach, DE
Gerhard Melzer · Herbstein, DE
Jorg Scriba · Ortenberg, DE
Suda G. Bhagwat · Double Oak, US
James Eisses · Coeur d'Alene, US

Key dates

Filing date	Aug 23, 1990
Grant date	Aug 30, 1994
Priority date	—
Expiry date	Aug 23, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.