US 12,221,784 B2
Acoustical building panel, monolithic surface covering system incorporating an acoustical building panel, and methods of forming and installing the same
Eric D Kragness, Sinking Spring, PA (US); Alexandra G Waltemyer, York, PA (US); Jason T Cavanaugh, Lancaster, PA (US); John E Hughes, Lincoln University, PA (US); Lori Jo L Shearer, Millersville, PA (US); Bartolo J Torre, Landisville, PA (US); and Allan L. Dinkel, Columbia, PA (US)
Assigned to AWI Licensing LLC, Wilmington, DE (US)
Filed by ARMSTRONG WORLD INDUSTRIES, INC., Lancaster, PA (US)
Filed on Apr. 27, 2023, as Appl. No. 18/140,430.
Application 18/140,430 is a division of application No. 16/702,133, filed on Dec. 3, 2019, granted, now 11,668,091.
Claims priority of provisional application 62/774,523, filed on Dec. 3, 2018.
Prior Publication US 2023/0265652 A1, Aug. 24, 2023
Int. Cl. E04C 2/16 (2006.01); E04B 1/99 (2006.01)
CPC E04C 2/16 (2013.01) [E04B 1/99 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustical building panel comprising:
a fibrous panel comprising:
a central portion having a first major surface;
a perimeter portion surrounding the central portion;
a recess press-formed into the perimeter portion, the recess circumscribing the first major surface and comprising a recess floor surface and a recess wall surface;
a second major surface opposite the first major surface; and
side edge surfaces that define a perimeter of the fibrous panel and extend from the second major surface to the recess floor surface;
wherein the recess floor surface is substantially planar;
wherein the recess wall surface is an inclined surface that extends inward and upward from the recess floor surface to the first major surface of the central portion;
wherein an upper layer portion of the perimeter portion of the fibrous panel is in a permanently-compressed state and a lower layer portion of the fibrous panel is in a non-compressed state; and
wherein the entirety of the central portion is in a non-compressed state.