3m Innovative Properties Company

Glen O Gregerson

Jonathan M Lise

Andrew R Fox

Bryan L Gerhardt

Stephen M Sanocki

Craig D Thompson

David James Prince

Zhiqun Zhang

Daniel E Johnson

Danielle M Schreppel

Christopher K Enstrom

David W Ziemann

David J Prince

Michael Alan Meis

Nicolas A Echeverri

Judd D Olson

Tien T Wu

Philip D Eitzman

Jimmy Minh Le

Dennis M Glass

Gerry A Hoffdahl

Himanshu Jasuja

Brenda K Balderas

Mikhail A Belkin

Thomas J Herbrand

Fiona E Menken

Nhat Ha Thi Nguyen

Laura C Chesnut

Kimberly W Menzenski

Kimberly W Gerwig

A framed air filter that includes air filter media and a frame with four frame portions. At least one corner of the frame is a bonded, non-integral corner at which a stabilizing flap that integrally extends from a first frame portion of a pair of neighboring frame portions that meet to form the non-integral, bonded corner, is affixed to an inner sidewall of a second frame portion of the pair of neighboring frame portions.

Framed air filter with stabilizing flap

A pleated air filter media with a plurality of continuous-contact reinforcing filaments on at least one face of the pleated air filter. The filaments have locally-thinned bending zones each of which is registered with pleat tip or pleat valley of the pleated air filter media.

Pleated air filter with reinforcing filaments comprising locally-thinned bending zones

A pleated air filter media is provided. The pleated air filter media comprises a plurality of upstream linear bridging filaments that are extrusion-bonded to at least some of a plurality of upstream pleat tips of a fibrous web, and a plurality of downstream continuous-contact filaments that are extrusion-bonded to a downstream face of the fibrous web. Methods of making and using the same are also provided.

Pleated air filter with bridging filaments and continuous-contact filaments

Air filter

A rigid, channel-framed, pleated air filter, with a plurality of linear bridging filaments on at least an upstream face of the pleated air filter media of the filter.

Channel-framed, pleated air filter with bridging filaments

The present disclosure relates to air filters. More particularly, it relates to air filters including pleated filter media that can be uniformly expanded and contracted. In some embodiments, the air filters are adjustably sized air filter systems. In some embodiments, the air filters can be used in a window opening.

Uniformly expandable air filter

An air filter media () including a pleated fibrous filtration web () with a first major side () that includes at least one sorbent-loaded area () in which sorbent particles () are present on a first major surface () of the pleated fibrous filtration web (), at least some of the sorbent particles () being post-pleat-deposited sorbent particles.

Air filter media with post-pleat-deposited sorbent particles

A rigid, channel-framed, non-compressible, non-nestable, pleated air filter, comprising: a tightly-pleated air filter media comprised of a nonwoven fibrous web and with an upstream face and a downstream face, wherein the tightly-pleated air filter media comprises a plurality of upstream (and downstream) pleat tips and upstream (and downstream) pleat valleys, the tightly-pleated air filter media comprising a plurality of upstream (and downstream) linear bridging filaments that are at least substantially parallel to each other and are oriented at least substantially orthogonal to the pleat direction and are extrusion-bonded to at least some of the upstream (and downstream) pleat tips, and, a channel frame comprising four major frame portions, with each major frame portion being mounted on one of the four major edges of the pleated air filter media.

An expandable air filter. The air filter including a filter media assembly, an outer frame assembly, and at least one support member. The filter media assembly defines opposing, first and second major faces and a perimeter. The outer frame assembly is arranged about the perimeter. The support member is connected to the outer frame assembly and extends across the first major face. Further, the support member defines a line of separation at which the support member can be separated into first and second segment to permit expansion of the air filter. The filter media can form a plurality of pleats, with at least one pleat being free of bonding to the outer frame assembly. The unbonded pleat experiences expansion as the air filter transitions to an expanded state. The air filter can be configured for expansion in one or both of a length and width direction.

Expandable air filters

An air filter device including an air filter unit and an expansion unit. The air filter unit includes a filter media assembly maintained by an outer frame assembly. The outer frame assembly defines exterior length, width and depth dimensions of the air filter device in an initial state. The expansion unit provides one or more of an expanded length, width or depth in an expanded state of the air filter device. Portions or an entirety of the expansion unit can provided apart from the air filter unit in a deliver condition of the air filter device, or can be assembled to the air filter unit prior to delivery to a user. The air filter devices of the present disclosure are useful with a wide variety of differently size air handling devices, able to readily seal with an air handling device compartment via the expansion unit.

Air filter devices with gap sealing unit

A framed air filter, comprising an air filter media having a generally rectangular perimeter with four major edges, and a frame comprising four frame portions. Each frame portion of the frame is mounted on one of the four major edges of the air filter media and met with neighbouring frame portions to form corners of the frame. At least one of the frame portions is provided by a frame piece that comprises first, second, third and fourth panels that are foldably connected by fold lines, which single frame piece is wrapped in a generally rectangular configuration so that the fourth panel comprises a forward terminal end that is abutted proximal a rearward major surface of the first panel. The third panel provides a rear wall of the frame portion with an inner edge provided by a fold line connecting the third panel to the fourth panel, wherein the inner edge is bowed.

Air filter comprising frame with bowed inner edge

A framed air filter in which at least one portion of the frame is provided by a spiral-wrapped frame piece in which a terminal segment of the spiral-wrapped frame piece serves as a reinforcing strut.

Growing community of inventors

Hudson, WI, United States of America

Glen O Gregerson