公开(公告)号：US20250018601A1

公开(公告)日：2025-01-16

申请号：US18625705

申请日：2024-04-03

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Mark K. HEMPHILL ,  Annamaria VILINSKA ,  Yijun SANG ,  Sooraj Kumar AMBADI OMANAKUTTAN NAIR

IPC: B28B19/00 ,  C04B11/00 ,  C04B111/00

Abstract: A method and apparatus to manufacture gypsum board that directs an aqueous gypsum slurry to a second cover sheet, and passes the second cover sheet over a roller spaced above a first cover sheet so that a majority of the aqueous gypsum slurry of falls off the second cover sheet to deposit over the first cover sheet. Another aqueous gypsum slurry of a different density than the deposited slurry is applied over the first cover sheet before and/or after the deposited slurry. A gypsum board having layers of different densities is made by the method and apparatus.

公开(公告)号：US20240033972A1

公开(公告)日：2024-02-01

申请号：US18349597

申请日：2023-07-10

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Sooraj Kumar AMBADI OMANAKUTTAN NAIR ,  Mark K. HEMPHILL ,  Yijun Sang ,  Annamaria Vilinska

IPC: B28B19/00 ,  C04B28/14

CPC classification number: B28B19/0092 ,  C04B28/14 ,  C04B2111/0062

Abstract: A method and apparatus to manufacture gypsum board that directs a first portion of aqueous gypsum slurry to a front cover sheet, directs a second portion of aqueous gypsum slurry to a back cover sheet, passes the back cover sheet over a roller spaced above the front cover sheet so that a majority of the second aqueous gypsum slurry falls off the back cover sheet onto the first portion of aqueous gypsum slurry on the front cover sheet. A gypsum board made by the method or apparatus.

公开(公告)号：US20240269888A1

公开(公告)日：2024-08-15

申请号：US18419213

申请日：2024-01-22

Applicant: United States Gypsum Company

Inventor： Sooraj Kumar AMBADI OMANAKUTTAN NAIR

IPC: B28B17/00 ,  B28B11/14 ,  B28B11/24 ,  B28B19/00 ,  G01N29/11 ,  G01N29/24

CPC classification number: B28B17/0072 ,  B28B11/14 ,  B28B11/243 ,  B28B19/0092 ,  G01N29/11 ,  G01N29/2481

Abstract: Embodiments of a system and a method for evaluating a mat-faced cementitious board specimen can be used to determine a bond strength value for the specimen. A moving assembly is configured to move a pair of non-contact ultrasonic transducers over an X-Y plane relative to the specimen supported in a support fixture such that the specimen is interposed between the transducers. A controller is configured to use ultrasonic signals from the transducers to determine the bond strength for at least one facer of a mat-faced cementitious board specimen. Transducer arrays can be outfitted downstream of the kiln, for example, to provide a system and a method for continuously measuring the bond strength of mat-faced cementitious board during the continuous manufacture thereof.