# US 9,433,884 B2 · Filtration media pack, filter element, and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,433,884 B2 - Document ID: US9433884B2 - Status: Granted - Kind: B2 - Application number: 14/040,929 - Filed: 2013-09-30 - Published: 2014-07-03 - Granted: 2016-09-06 - Earliest claimed: 2007-06-26 - Assignees: Donaldson Company, Inc. - Applicants: Donaldson Company, Inc. - Inventors: Gary J. Rocklitz; Robert M. Rogers; Daniel E. Adamek; Ming Ouyang; Anitha Mathew - Web page: https://patentgrep.com/patent/US9433884B2 ## CPC - B01D 46/526: {in stacked arrangement} - B01D 46/0001: {Making filtering elements} - B01D 46/522: {with specific folds, e.g. having different lengths} - B01D 46/525: {which comprises flutes} - B01D 46/527: {in wound arrangement} - Y10T 156/10: Methods of surface bonding and/or assembly therefor - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid. ## Claims ### Claim 1 A filtration media pack comprising: (a) a plurality of layers of single facer media wherein the layers of single facer media comprise a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack; (b) a first portion of the plurality of flutes being closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality off lutes being closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the fluid; (c) the plurality of flutes having an average flute length of less than 5 inches, and at least one ridge extending along at least a portion of the flute length between adjacent peaks, the ridge comprising a discontinuity in the curvature of the flute between the adjacent peaks; and (d) the filtration media pack exhibiting a flute density (ρ) of at least 35.0 flute/inch2 according to the formula: ρ = number ⁢ ⁢ of ⁢ ⁢ channels ⁢ ⁢ ( open ⁢ ⁢ and ⁢ ⁢ closed ) 2 × z ⁢ - ⁢ media ⁢ ⁢ pack ⁢ ⁢ cross ⁢ ⁢ sectional ⁢ ⁢ area wherein the number of channels is counted and the media cross sectional area is measured. ### Claim 2 (depends on 1) A filtration media pack according to claim 1, wherein the fluted sheet comprises repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet and a pattern of at least one ridge extending along at least 50% of the flute length between an internal peak and an adjacent external peak. ### Claim 3 (depends on 2) A filtration media pack according to claim 2, wherein the fluted sheet comprises at least two ridges along at least 50% of the flute length between an internal peak and an adjacent external eak. ### Claim 4 (depends on 2) A filtration media pack according to claim 2, where at least two ridges are provided in a pattern between an internal peak and an adjacent external peak. ### Claim 5 (depends on 1) A filtration media pack according to claim 1, wherein the filtration media pack exhibits a flute density of at least about 40 flute/inch2. ### Claim 6 (depends on 1) A filtration media pack according to claim 1, wherein the first portion of the plurality of flutes are sealed by a sealant bead and the second portion of the plurality of flutes are sealed by a sealant bead. ### Claim 7 (depends on 6) A filtration media pack according to claim 6, wherein the sealant bead sealing at least one of the first portion of the plurality of flutes or the second portion of the plurality of flutes have an average plug length of less than about 7 mm. ### Claim 8 (depends on 1) A filtration media pack according to claim 1, wherein the plurality of single facer media are provided in a coiled arrangement. ### Claim 9 (depends on 1) A filtration media pack according to claim 1, wherein a plurality of single facer media are provided in a stacked arrangement. ### Claim 10 (depends on 1) A filtration media pack according to claim 1, wherein the media pack has an asymmetric volume arrangement so that a volume on one side of the media pack is greater than a volume on another side of the media pack by at least 10%. ### Claim 11 (depends on 1) A filtration media pack according to claim 1, wherein the flute width height ratio is greater than 2.5. ### Claim 12 (depends on 1) A filtration media pack according to claim 1, wherein the flute width height ratio of less than 0.4. ### Claim 13 (depends on 1) A filtration media pack according to claim 1, wherein the average flute length is about 2 inches to about 4 inches. ### Claim 14 (depends on 1) A filtration media pack according to claim 1, wherein the flutes are provided in a non-regular arrangement. ### Claim 15 (depends on 1) A filter element comprising a filtration media pack according to claim 1 and a seal member extending around a periphery of the media pack. ### Claim 16 A filtration media pack comprising: (a) a plurality of layers of single facer media wherein the layers of single facer media comprise a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack; (b) a first portion of the plurality of flutes being closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes being closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the fluid, and at least one ridge extending along at least a portion of the flute length between adjacent peaks, the ridge comprising a discontinuity in the curvature of the flute between the adjacent peaks; and (c) the filtration media pack exhibits a flute density (ρ) of the media pack of least 35.0 flute/inch2 according to at the formula: ρ = number ⁢ ⁢ of ⁢ ⁢ channels ⁢ ⁢ ( open ⁢ ⁢ and ⁢ ⁢ closed ) 2 × z ⁢ - ⁢ media ⁢ ⁢ pack ⁢ ⁢ cross ⁢ ⁢ sectional ⁢ ⁢ area wherein the number of channels is counted and the media cross sectional area is measured; and (d) the filtration media pack has an asymmetric volume arrangement so that a volume on one side of the media pack is greater than a volume on another side of the media pack by at least 10%. ### Claim 17 (depends on 16) A filtration media pack according to claim 16, wherein the fluted sheet comprises repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet and a pattern of at least one ridge extending along at least 50% of the flute length between an internal peak and an adjacent external peak. ### Claim 18 (depends on 17) A filtration media pack according to claim 17, wherein the fluted sheet comprises at least two ridges along at least 50% of the flute length between an internal peak and an adjacent external peak. ### Claim 19 (depends on 17) A filtration media pack according to claim 17, where at least two ridges are provided in a pattern between an internal peak and an adjacent external peak. ### Claim 20 A filtration media pack comprising: (a) a plurality of layers of single facer media wherein the layers of single facer media comprise a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack; (b) a first portion of the plurality of flutes being closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes being closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the fluid; (c) the filtration media pack has an average flute length of greater than about 4 inches, and at least one ridge extending along at least a portion of the flute length between adjacent peaks, the ridge comprising a discontinuity in the curvature of the flute between the adjacent peaks; and (d) the filtration media pack has a flute width height ratio of greater than 2.5 or less than 0.4; and (e) wherein the filtration media pack has an asymmetric volume arrangement so that a volume on one side of the media pack is greater than a volume on the other side of the media pack by at least 10%. ### Claim 21 A filtration media pack comprising: (a) a plurality of layers of single facer media wherein the layers of single facer media comprise a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack; (b) a first portion of the plurality of flutes being closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes being closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the fluid; (c) the plurality of flutes having at least one ridge extending along at least a portion of the flute length between adjacent peaks, the ridge comprising a discontinuity in the curvature of the flute between the adjacent peaks; and (d) the filtration media pack exhibiting a flute density (ρ) of at least 35.0 flute/inch2 according to the formula: ρ = number ⁢ ⁢ of ⁢ ⁢ channels ⁢ ⁢ ( open ⁢ ⁢ and ⁢ ⁢ closed ) 2 × z ⁢ - ⁢ media ⁢ ⁢ pack ⁢ ⁢ cross ⁢ ⁢ sectional ⁢ ⁢ area wherein the number of channels is counted and the media cross sectional area is measured.