United States Gypsum Company

Frederick Thomas Jones

Qiang Yu

Steven W Sucech

Brent E Groza

Raymond John Mlinac

Paul J Henkels

Srinivas Veeramasuneni

Michael R Lynn

Qingxia Liu

William Rago

Dick C Engbrecht

Brad Todd

Gregory J Cormier

Gladys Cedella Cormier

Frederick M Boehnert

Gerry L Heschel

Kurt N Peterson

Raymond J Mlinac

A cementitious slurry mixing and dispensing system includes a slurry mixer that agitates and forms aqueous cementitious slurry, a discharge conduit in communication with the mixer and forming an interior surface defining a slurry flow path to convey the slurry therethrough to an outlet, a distribution mat disposed proximally to the outlet, a vibrating plate supporting the distribution mat, an overhead bracing system from which the vibrating plate is suspended, and a plurality of support members coupled between the overhead bracing system and the vibrating plate. The vibrating plate is adapted to impart vibrational forces on the distribution mat to promote movement of the aqueous slurry. Each support member includes a rod, a hollow coupling member, and at least one resilient bushing assembly adapted to dampen the vibrational forces exerted by the vibrating plate, thereby isolating the rod and the overhead bracing system from the vibrational forces.

Slurry distribution system with vibration isolation

The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.

Gypsum-containing product

Gypsum-containing product and gypsum board

Gypsum-containing product and method for producing same

A gypsum/fiber board having improved impact resistance is produced by mixing predetermined amounts of fibers, calcined gypsum and water to form a mixture of wetted, loose fibers; laying out a reinforcing mesh over the upper surface of a forming belt; depositing said mixture on said mesh to form a layer of said mixture, said; and compressing said mesh together with said layer of mixture to embed said mesh in the lower surface of said layer to form a board composed of bonded fibers and gypsum with said mesh embedded in the surface thereof.

Method of producing gypsum/fiber board

A method of continuously forming a multilayer panel includes making a gypsum slurry, then dividing the gypsum slurry into at least a primary gypsum slurry and a secondary gypsum slurry. An additive slurry having water and an intumescent material is created, then added to the secondary gypsum slurry to make an expandable layer slurry that is spread over at least a portion of a facing material. The primary gypsum slurry is distributed over the secondary gypsum slurry over the facing material and the expanding layer slurry to form a core. Optionally, another layer, an edge coating, is applied to the expanding layer for additional fire protection. The edge coating includes a second intumescent material. During a fire, the expanding layer expands to increase the thickness of the fire exposed gypsum panel and the edge coating expands to seal the gap between adjoining gypsum panels.

Fire-resistant gypsum panel

Gypsum-containing board and tile, and method for producing same

A method for producing a set gypsum-containing product comprising an interlocking matrix of set gypsum wherein said method comprises applying to said set gypsum one or more enhancing materials selected from the group consisting of phosphoric acid; condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units, and monobasic salts or monovalent ions of orthophosphates.

Gypsum-containing board and tile, and method for producing gypsum-containing board and tile

Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it

A set gypsum composition and methods for the preparation thereof are disclosed. The set gypsum composition comprises a continuous phase of interlocking set gypsum matrix having an enhanced water voids volume and/or is prepared from a mixture (e.g., slurry) comprising an elevated ratio of water to calcined gypsum. Also disclosed is an article comprising the set gypsum composition.

Gypsum compositions and related methods

Growing community of inventors

Grayslake, IL, United States of America

Frederick Thomas Jones