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    LOW DUST GYPSUM WALLBOARD
    1.
    发明申请
    LOW DUST GYPSUM WALLBOARD 审中-公开

    公开(公告)号：US20190382311A1

    公开(公告)日：2019-12-19

    申请号：US16521072

    申请日：2019-07-24

    Applicant: United States Gypsum Company

    Inventor： Qiang YU ,  Weixin D. SONG

    IPC: C04B28/14 ,  B32B13/04 ,  B32B13/08 ,  B32B13/14 ,  B32B17/02 ,  B32B29/00 ,  B32B13/02

    Abstract: This invention provides low dust low density gypsum wallboard products having high total core void volumes, corresponding to low densities in the range of about 10 to 30 pcf. The wallboards have a set gypsum core formed between two substantially parallel cover sheets, the set gypsum core preferably having a total void volume from about 80% to about 92%, and made from a slurry including stucco, pregelatinized starch, and a naphthalenesulfonate dispersant. The combination of the pregelatinized starch and the naphthalenesulfonate dispersant also provides a glue-like effect in binding the set gypsum crystals together. The wallboard formulation, along with small air bubble voids (and water voids) provides dust control during cutting, sawing, routing, snapping, nailing or screwing down, or drilling of the gypsum-containing products. This invention also provides a method of making the low dust low density gypsum products including the introduction of soap foam in an amount sufficient to form a total void volume, including air voids, preferably from about 80% to about 92% in the set gypsum core, corresponding to a set gypsum core density from about 10 pcf to about 30 pcf. The wallboards produced by the method generate significantly less dust during working.

    SYSTEM AND METHOD FOR DETERMINING FACER SURFACE SMOOTHNESS
    3.
    发明申请
    SYSTEM AND METHOD FOR DETERMINING FACER SURFACE SMOOTHNESS 审中-公开
    用于确定表面光滑度的系统和方法

    公开(公告)号：US20160364852A1

    公开(公告)日：2016-12-15

    申请号：US15099082

    申请日：2016-04-14

    Applicant: United States Gypsum Company

    Inventor： Jenner OMODT ,  Alfred C. LI ,  Michael P. SHAKE ,  Weixin D. SONG

    IPC: G06T7/00

    CPC classification number: G01B11/30

    Abstract: Embodiments of a system and a method for determining a surface smoothness of a facing specimen can be used in connection with the manufacture of products, including cementitious products such as gypsum wallboard, for example. Such systems and methods can be used to generate a composite smoothness factor based upon a measured mottle value and topography value using stochastic frequency distribution analysis.

    Abstract translation: 用于确定面对样品的表面平滑度的系统和方法的实施例可以与例如石膏墙板等水泥质产品的制品的制造结合使用。 这种系统和方法可以用于使用随机频率分布分析基于测量的斑点值和形貌值来产生复合平滑因子。

    MULTIPLE-LEG DISCHARGE BOOT FOR SLURRY DISTRIBUTION
    9.
    发明申请
    MULTIPLE-LEG DISCHARGE BOOT FOR SLURRY DISTRIBUTION 审中-公开
    用于浆液分配的多层排放引擎

    公开(公告)号：US20130100759A1

    公开(公告)日：2013-04-25

    申请号：US13659672

    申请日：2012-10-24

    Applicant: United States Gypsum Company

    Inventor： James WITTBOLD ,  Alfred C. LI ,  Chris C. LEE ,  Cesar CHAN ,  William RAGO ,  Weixin D. SONG

    IPC: F17D1/08 ,  B28C5/00

    CPC classification number: F17D1/08 ,  B28B19/0092 ,  B28C5/00 ,  B28C5/003 ,  B28C5/0881 ,  F16L41/023 ,  Y10T137/85938

    Abstract: A multi-leg discharge boot can include an inlet conduit and first and second outlet conduits separated by a junction portion. The inlet conduit includes an entry segment, a transition segment and a heel portion disposed therebetween. The inlet conduit can include an inlet end and a junction end. A junction portion is disposed at the junction end of the inlet conduit between first and second junction openings. The junction portion includes a substantially planar wall region that is substantially perpendicular to a main flow discharge axis.

    Abstract translation: 多腿排放管可以包括入口管道和由接合部分分开的第一和第二出口管道。 入口导管包括入口段，过渡段和设置在其间的脚跟部分。 入口导管可以包括入口端和连接端。 接合部分设置在第一和第二接合开口之间的入口导管的连接端处。 接合部分包括基本上垂直于主流动排放轴线的基本平坦的壁区域。

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