US 11,986,762 B2
Fiberglass product for a filter apparatus
Alejandro Vinardi, Fayetteville, AR (US); Matthew Shaffer, Louisville, KY (US); and William Barrows, Jeffersonville, IN (US)
Assigned to AMERICAN AIR FILTER COMPANY, INC., Louisville, KY (US)
Filed by American Air Filter Company, Inc., Louisville, KY (US)
Filed on Feb. 26, 2021, as Appl. No. 17/187,224.
Claims priority of provisional application 62/984,619, filed on Mar. 3, 2020.
Prior Publication US 2021/0275958 A1, Sep. 9, 2021
Int. Cl. B01D 29/11 (2006.01); B01D 39/20 (2006.01); B01D 46/00 (2022.01); B01D 46/06 (2006.01)
CPC B01D 46/06 (2013.01) [B01D 29/11 (2013.01); B01D 39/2003 (2013.01); B01D 39/2017 (2013.01); B01D 46/0005 (2013.01); B01D 2239/0681 (2013.01); B01D 2275/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fiberglass product comprising:
a first fiber curl layer on an upstream air entry side of the fiberglass product, the first fiber curl layer having a plurality of fiber curl first fibers and a constant first density;
a fiberglass backing layer on a downstream air exit side of the fiberglass product opposite the air entry side of the fiberglass product, wherein the fiberglass backing layer includes a plurality of third fibers and a constant third density; and
a second fiber curl layer between the first fiber curl layer and the fiberglass backing layer, wherein the second fiber curl layer includes a plurality of fiber curl second fibers and a constant second density, wherein the second density is larger than the first density, and wherein the third density is larger than the second density.