公开(公告)号：US20190100927A1

公开(公告)日：2019-04-04

申请号：US15722359

申请日：2017-10-02

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： David D. PELOT ,  William J. RAGO ,  Charles W. COCHRAN ,  Samar EMAMI

IPC: E04F21/02 ,  E04F21/165 ,  B44C7/04

CPC classification number: E04F21/026 ,  B44C7/04 ,  B44C7/06 ,  B65H35/0053 ,  E04F21/05 ,  E04F21/165 ,  E04F21/1652 ,  E04F21/1657 ,  Y10T156/1788

Abstract: A joint tape embedding apparatus configured to determine the bonding and/or “feel” of embedding joint tape into a dry wall or wall board joint using a particular joint compound. The joint embedding apparatus is configured to allow the same user or different users to accurately repeat the determination of the bonding and/or “feel” attributes of the joint compound.

公开(公告)号：US20180215059A1

公开(公告)日：2018-08-02

申请号：US15419476

申请日：2017-01-30

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： William J. RAGO ,  Charles W. COCHRAN

IPC: B26D3/08 ,  G01N3/08 ,  B26D7/26

CPC classification number: B26D3/085 ,  B26D1/04 ,  B26D3/08 ,  B26D5/10 ,  B26D7/0006 ,  B26D7/2614 ,  G01N3/08 ,  G01N2203/0003 ,  G01N2203/0012 ,  G01N2203/0041 ,  G01N2203/0096

Abstract: A bench top board scoring device is provided, including a frame having a first end and an opposite second end, a work area defined between the first and second ends, each end having at least one leg configured for contacting a substrate. A track is connected to the frame and extends between the first end and the second end, a carriage is slidably mounted to the track for travel between the first end and the second end, and an arm has an upper surface, a pivot end pivotally connected to the carriage, and an opposite knife mount end. A knife blade is mounted to the knife mount end. Wherein the present device is constructed and arranged so that as the carriage is moved from the first end to the second end, wallboard samples placed in the work area and contacted by the knife blade receive a constant scoring force.

公开(公告)号：US20200055278A1

公开(公告)日：2020-02-20

申请号：US16401719

申请日：2019-05-02

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Qinghua LI ,  Runhai LU ,  Charles W. COCHRAN ,  Mark HEMPHILL

IPC: B32B13/08 ,  B32B29/06 ,  B32B29/00 ,  B32B3/26 ,  C04B28/14

Abstract: Gypsum boards formed from synthetic gypsum and other gypsum sources having high chloride salt concentrations. Gypsum boards may include a board core including set gypsum. A total concentration of the chloride anion in the board core ranges from about 500 ppm to about 3000 ppm, typically about 1000 ppm to about 3000 ppm, based on weight of the calcium sulfate hemihydrate. An inner surface of a front paper cover sheet contacts a first face of the board core. An inner surface of a back paper cover sheet contacts a second face of the board core. A starch layer coats the inner surface of at least one of the front and back cover sheet. Methods of making the gypsum board, and a wall system for employing the gypsum boards, are also provided.

公开(公告)号：US20200055277A1

公开(公告)日：2020-02-20

申请号：US16401675

申请日：2019-05-02

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Mark HEMPHILL ,  Qinghua LI ,  Charles W. COCHRAN

IPC: B32B13/08 ,  B32B29/06 ,  B32B29/00 ,  B32B3/26 ,  C04B28/14

Abstract: Gypsum boards formed from synthetic gypsum and other gypsum sources having high chloride salt concentrations. The gypsum boards may include a set gypsum board core layer between a front and back paper cover sheets. The back paper cover sheet has a plurality of perforations extending therethrough. Methods of making the gypsum boards, and a wall system for employing the gypsum boards, are also provided. The concentration of the chloride anion in aqueous gypsum slurry used to make the set gypsum board core layer and to perform the methods of the invention may range from about 500 ppm to about 3000 ppm, typically from about 500 ppm to about 2000 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate, more typically from about 500 ppm to about 1500 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate.

公开(公告)号：US20200033111A1

公开(公告)日：2020-01-30

申请号：US16375670

申请日：2019-04-04

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Jerry D. WONDERLICH ,  John A. KOCH ,  Charles W. COCHRAN ,  Tim LUCAS ,  Jenner OMODT

IPC: G01B5/28 ,  G01B5/14 ,  B26F3/00

Abstract: A procedure is provided for evaluating the score, snap and edge appearance of wallboard panels, and includes scoring a wallboard panel with a knife at a constant and known force using a benchtop board scoring device; snapping the scored panel in a Universal Board Testing Machine to measure the breaking force, forming a snapped panel edge; measuring a cleanliness of the snapped panel edge by placing a straight edge against the snapped panel edge and measuring gaps between the snapped panel edge and the straight edge in a plurality of locations on a face of the panel, and a plurality of locations on a back of the panel; and averaging all of the measured gaps to create an Index Score.