US 12,017,175 B2
Pleated air filter with bridging filaments and continuous-contact filaments
Zhiqun Zhang, North Oaks, MN (US); Nhat Ha Thi Nguyen, Woodbury, MN (US); Jimmy M. Le, St. Paul, MN (US); Glen O. Gregerson, Hudson, WI (US); Bryan L. Gerhardt, Woodbury, MN (US); and Philip D. Eitzman, Lake Elmo, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/263,834
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jul. 30, 2019, PCT No. PCT/IB2019/056507
§ 371(c)(1), (2) Date Jan. 27, 2021,
PCT Pub. No. WO2020/026149, PCT Pub. Date Feb. 6, 2020.
Claims priority of provisional application 62/714,178, filed on Aug. 3, 2018.
Prior Publication US 2021/0229022 A1, Jul. 29, 2021
Int. Cl. B01D 46/52 (2006.01); B01D 39/16 (2006.01); B01D 46/00 (2022.01); B31D 5/00 (2017.01)
CPC B01D 46/523 (2013.01) [B01D 39/163 (2013.01); B01D 46/0001 (2013.01); B01D 46/0005 (2013.01); B01D 46/0032 (2013.01); B31D 5/0082 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0627 (2013.01); B01D 2239/10 (2013.01); B01D 2265/04 (2013.01); B01D 2265/06 (2013.01); B01D 2275/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pleated air filter media comprising an upstream face and a downstream face and a plurality of oppositely-facing pleats with a pleat direction and with a plurality of upstream pleat tips and upstream pleat valleys and downstream pleat tips and downstream pleat valleys,
wherein the pleated air filter media comprises a plurality of upstream linear bridging filaments that are extrusion-bonded to at least some of the upstream pleat tips of the pleated air filter media,
and,
wherein the pleated air filter media comprises a plurality of downstream continuous-contact filaments that are extrusion-bonded to the downstream face of the pleated air filter media.