WO1993002769A1 - Filter and method of manufacture - Google Patents
Filter and method of manufacture Download PDFInfo
- Publication number
- WO1993002769A1 WO1993002769A1 PCT/EP1992/001657 EP9201657W WO9302769A1 WO 1993002769 A1 WO1993002769 A1 WO 1993002769A1 EP 9201657 W EP9201657 W EP 9201657W WO 9302769 A1 WO9302769 A1 WO 9302769A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- beads
- filter body
- fold
- filter
- aforementioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/012—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
Definitions
- the invention relates to a filter body made of a relatively thin-walled, zigzag folded web of filter material made of filter material with molded beads according to the
- the invention also relates to a method for producing the filter bodies mentioned above according to the preambles of patent claims 13 and 14.
- Such a filter body is known from DE-PS 12 48 618.
- the beads are shaped in such a way that, when installed, there are gaps of the same shape both on the inflow side and on the outflow side.
- a bead projecting to the upstream side lies with its long side on one to the downstream side
- the beads pointing outwards form the end; this can be done at this point in particular if the inflowing medium is under pressure or is a liquid to collapse the
- rectilinear notch sections laterally offset notch sections are generated, which alternate with each other and thus during folding without further intermediate manipulation via the
- the fold edge length alternately creates sharp fold edges and flat spacing. If one carries out the embossing of the flat spacers distributed undefined over the
- Filter bodies with cladding for the purpose of distance maintenance, at least in the edge region of the filter body.
- the object of the invention is to avoid the disadvantages mentioned above, to reduce the number of manufacturing steps and to increase the dust capacity.
- the aim of the invention is to avoid the individual folds lying against one another over a large area.
- the object is achieved in that at least one of the beads is designed according to the characterizing features of claim 1.
- the main claim is a simplified method Manufacture enables that additionally increases the dust capacity and stability of the filter body and avoids perforation of the paper.
- An advantageous development of the invention is the
- Filter bodies are characterized in that they are designed according to the characterizing features of claims 13 and 14.
- Figure 1 is a plan view of an extended filter body
- Figure 2 is a perspective view of a filter body
- Figure 3 is a plan view of a pleated filter body
- Figure 4 is a plan view of a pleated filter body
- FIG. 5 shows a section through the filter body in FIG. 4;
- FIG. 6 is a plan view of a filter body with glue
- FIG. 7 shows a section through the filter body in FIG. 6
- Figure 8 shows a section through the embossing, which in
- Figure 9 shows a section through the embossing, which is convex in the fold area.
- Figure 10 is a plan view of a filter body, which has closed tube cross sections with the help of continuous embossing and additional glue applied.
- the filter body 1 which is produced with the aid of only one embossing roller, is provided with continuous beads 2 or with additional embossments which are provided between the beads running along the filter body and which are in the form of flattenings 3 (FIGS. 1, 2, 3, 4, 6). .
- this function is taken over by the spatial embossing, which can take on all the shapes mentioned in the subclaims both in the area of the fold edges and in the further course of the filter path.
- the flats 3 (oval, round, polygonal, convex or concave) attached in the area of the fold edges prevent the filter body 1 and
- Torsion resistance and for setting a defined fold spacing is the provision of at least one bead with glue 4 (Fig. 4, 5, 6, 7).
- glue 4 FIG. 10
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Filter und HerstelIverfahren Filters and manufacturing processes
Beschreibung description
Die Erfindung betrifft einen Filterkörper aus einer relativ dünnwandigen, zwischen Faltenkanten zickzackförmig gefalteten Bahn aus Filtermaterial mit eingeformten Sicken nach demThe invention relates to a filter body made of a relatively thin-walled, zigzag folded web of filter material made of filter material with molded beads according to the
Oberbegriff des Anspruchs 1, sowie Filterkörper aus diesen Materialien nach dem Oberbegriff des Patentansoruchs 4. The preamble of claim 1 and filter bodies made of these materials according to the preamble of patent claim 4.
Außerdem betrifft die Erfindung ein Verfahren zur Herstellung der oben genannten Filterkörper nach den Oberbegriffen der Patentansprücne 13 und 14. The invention also relates to a method for producing the filter bodies mentioned above according to the preambles of patent claims 13 and 14.
Es ist aus der DE-PS 12 48 618 ein derartiger Filterkörper bekannt. Die Sicken sind so geformt, daß sich im verbauten Zustand sowohl auf der Anströmr als auch auf der Abströmseite gleichartig geformte Zwischenräume ergeben. Bei der bekannten Ausführung liegt jeweils eine zur Anströmseite herausragende Sicke mit ihrer Längsseite an einer zur Abströmseite Such a filter body is known from DE-PS 12 48 618. The beads are shaped in such a way that, when installed, there are gaps of the same shape both on the inflow side and on the outflow side. In the known embodiment, a bead projecting to the upstream side lies with its long side on one to the downstream side
herausragenden Nachbarsicke. Beim Falten der Filterbahn führt dies dazu, daß sowohl ans trömseitig als auch abströmseitig jeweils konvexe Ausbildungen als Abstandshalter outstanding neighbor bead. When the filter web is folded, this leads to convex configurations as spacers both on the upstream and downstream sides
aufeinandertreffen. meet.
Abströmseitig bilden wie auch an strömseitig die nach außen weisenden Sicken den Abschluß, dies kann an dieser Stelle insbesondere, wenn das anströmende Medium unter Druck steht oder eine Flüssigkeit ist, zum Zusammenfallen des On the outflow side, as on the upstream side, the beads pointing outwards form the end; this can be done at this point in particular if the inflowing medium is under pressure or is a liquid to collapse the
Filtermaterials führen, was zur Folge hat, daß sich die Lead filter material, which has the consequence that the
Filterkapazität verkleinert und die Strömungsquerschnitte sich verändern. Es ist weiterhin aus der DE-PS 33 90 055 bekannt, daß ein Filter capacity reduced and the flow cross-sections change. It is also known from DE-PS 33 90 055 that a
Verfahren existiert, daß bei der Herstellung der Kerblinie geradlinige, miteinander fluchtende Kerbabschnitte und zwischen diesen Kerbabschnitten gegenüber der Mittelachse der Process exists that in the production of the score line straight, aligned notch sections and between these notch sections with respect to the central axis of the
geradlinigen Kerbabschnitte seitlich versetzte Kerbabschnitte erzeugt werden, die miteinander abwechseln und derart beim Falten ohne weitere Zwischenmanipulationen über die rectilinear notch sections laterally offset notch sections are generated, which alternate with each other and thus during folding without further intermediate manipulation via the
Faltkantenlänge gesehen abwechselnd spitze Faltenkanten und flächige Abstandshalber schaffen. Führt man die Prägung der flächigen Abstandshalter nun undefiniert verteilt über die As seen, the fold edge length alternately creates sharp fold edges and flat spacing. If one carries out the embossing of the flat spacers distributed undefined over the
Faltkantenlänge aus, so läuft man Gefahr, daß das Filterpapier Perforationen erleidet. Folded edge length, there is a risk that the filter paper will suffer perforations.
Es ist ferner seit Jahrzehnten beKannt, daß derartige It has also been known for decades that such
Filterkörper mit Abclattungen zum Zwecke der Abstandsnaltung, zumindest im Randbereich des Filterkörpers hergestellt werden. Filter bodies with cladding for the purpose of distance maintenance, at least in the edge region of the filter body.
Die Aufgabe der Erfindung besteht darin, die oben genannten Nachteile zu vermeiden, die Zahl der Fertigungsschritte zu verringern und die Staubkapazität zu erhöhen. Es ist das Ziel der Erfindung, das großflächige Aneinanderliegen der einzelnen Falten zu vermeiden. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß mindestens eine der Sicken nach den kennzeichnender Merkmalen des Patentanspruchs 1 ausgebildet ist. The object of the invention is to avoid the disadvantages mentioned above, to reduce the number of manufacturing steps and to increase the dust capacity. The aim of the invention is to avoid the individual folds lying against one another over a large area. The object is achieved in that at least one of the beads is designed according to the characterizing features of claim 1.
Eine alternative Lösung ist darin zu sehen, daß mindestens eine der Sicken nach den kennzeichnenden Merkmalen des An alternative solution is to be seen in the fact that at least one of the beads according to the characteristic features of the
Patentanspruchs 4 ausgebildet ist. Der Vorteil der Lösung ist darin zu sehen, daß die im Claim 4 is formed. The advantage of the solution is that the im
Hauptanspruch angesorochene Methode ein vereinfachtes Herstellen ermöglicht, die zusätzlich die Staubkapazität und die Stabilität des Filterkörpers erhöht sowie eine Perforation des Papiers vermeidet. Eine vorteilhafte Weiterbildung der Erfindung stellt die The main claim is a simplified method Manufacture enables that additionally increases the dust capacity and stability of the filter body and avoids perforation of the paper. An advantageous development of the invention is the
Teilung der Faltenkante dar, um durch eine durch die Prägung verursachte räumliche Verbreiterung der Faltenkante definierte Abstandshaltung der Falten zu erreichen. Einen vorteilhaften Nebeneffekt der Erfindung stellt das Division of the fold edge in order to achieve defined spacing of the folds due to a spatial widening of the fold edge caused by the embossing. This is an advantageous side effect of the invention
Versehen der Sicke mit Leim dar, um einen aushärtbar und somit dauerhaft abstandshaltenden Streifen zu erzeugen. Provide the bead with glue to create a hardenable and thus permanently spacing strip.
Eine vorteilhafte Ausgestaltung der Erfindung stellt das This is an advantageous embodiment of the invention
Versehen der Sicke mit Leim dar, um eine dauerhafte Provide the beading with glue to make it permanent
Klebeverbindung herzustellen, die es erlaubt, auch Establish adhesive bond that allows it, too
verdrehsteife Filterkörper zu erzeugen. to produce torsionally rigid filter bodies.
Besonders vortei lhafte Verfahren zur Herstellung eines Particularly advantageous process for producing a
Filterkörpers sind dadurch gekennzeichnet, daß sie gemäß den kennzeichnenden Merkmalen der Patentansprüche 13 und 14 ausgestaltet sind. Filter bodies are characterized in that they are designed according to the characterizing features of claims 13 and 14.
Mehrere Aus führungsbeispiele der Erfindung und ihrer From several exemplary embodiments of the invention and its
vorteilhaften Weiterbi ldungen werden im folgenden unter Advantageous further training are described below
Bezugnahme auf die beigefügten Zeichnungen näher beschrieben Es stellen dar: Described in more detail with reference to the accompanying drawings.
Figur 1 eine Draufsicht eines ausgestreckten Filterkörpers; Figure 1 is a plan view of an extended filter body;
Figur 2 eine perspektivische Darstellung eines Filterkörpers; Figure 2 is a perspective view of a filter body;
Figur 3 eine Draufsicht auf einen gefalteten Filterkörper; Figur 4 eine Draufsicht eines gefalteten Filterkörpers mit Figure 3 is a plan view of a pleated filter body; Figure 4 is a plan view of a pleated filter body
Leim; Figur 5 einen Schnitt durch den Filterkörper in Figur 4; Glue; FIG. 5 shows a section through the filter body in FIG. 4;
Figur 6 eine Draufsicht auf einen Filterkörper mit Leim; Figur 7 einen Schnitt durch den Filterkörper in Figur 6; Figure 6 is a plan view of a filter body with glue; FIG. 7 shows a section through the filter body in FIG. 6;
Figur 8 einen Schnitt durch die Prägung, die im Figure 8 shows a section through the embossing, which in
Fa Itenkantenbereich konkav ist; Figur 9 einen Schnitt durch die Prägung, die im Faltenbereich konvex ist. Fa edge area is concave; Figure 9 shows a section through the embossing, which is convex in the fold area.
Figur 10 eine Draufsicht auf einen Filterkörper, der mit Hilfe der durchgehenden Prägung und von zusätzlich aufgebrachtem Leim geschlossene Rohrquerschnitte hat. Figure 10 is a plan view of a filter body, which has closed tube cross sections with the help of continuous embossing and additional glue applied.
Der mit Hilfe von lediglich einer Prägewalze hergestellte Filterkörper 1 wird mit durchgehenden Sicken 2 oder mit zusätzlichen, zwischen den längs des Filterkόrpers laufenden Sicken angebrachten Prägungen, die sich als Abplattungen 3 ausprägen, versehen (Fig. 1, 2, 3, 4, 6). Garantierte bisher eine Imprägnierung die Formstaoilität solcher Filter, so übernehmen diese Funktion die räumlichen Prägungen, die sowoh im Bereich der Faltenkanten als auch im weiteren Verlauf der Filterbahn alle in den Unteransprüchen genannten Formen annehmen können. Die im Bereich der Faltenkanten angebrachten Abplattungen 3 (oval, rund, vieleckig, konvex oder konkav) verhindern ein Zusammenfallen des Filterkörpers 1 und The filter body 1, which is produced with the aid of only one embossing roller, is provided with continuous beads 2 or with additional embossments which are provided between the beads running along the filter body and which are in the form of flattenings 3 (FIGS. 1, 2, 3, 4, 6). . Until now, impregnation guaranteed the shape stability of such filters, this function is taken over by the spatial embossing, which can take on all the shapes mentioned in the subclaims both in the area of the fold edges and in the further course of the filter path. The flats 3 (oval, round, polygonal, convex or concave) attached in the area of the fold edges prevent the filter body 1 and
garantieren eine konstante Staubaufnahmekapazität (Fig. 1, 2, 3, 4, 6). In Figur 8 wird die konkave Prägung im Bereich der Faltenkante dargestellt, die konvexe Prägung in genanntem Bereich zeigt Figur 9. Zur zusätzlichen Erhöhung der guarantee a constant dust holding capacity (Fig. 1, 2, 3, 4, 6). The concave embossing in the area of the fold edge is shown in FIG. 8, the convex embossing in the area mentioned is shown in FIG. 9. To further increase the
Verwindungsstei figkeit und zur Einstellung eines definierten Faltenabstands dient das Versehen mindestens einer Sicke mit Leim 4 (Fig. 4, 5, 6, 7). Zur Erzeugung von geschlossenen Rohrquerschnitten, die der weiteren Erhöhung der Steifigkeit dienen, versieht man die inneren Kanten der durchgehenden Sicken mit Leim 4 (Figur 10) Torsion resistance and for setting a defined fold spacing is the provision of at least one bead with glue 4 (Fig. 4, 5, 6, 7). To create closed pipe cross sections, which serve to further increase the rigidity, the inner edges of the continuous beads are provided with glue 4 (FIG. 10).
Bezugszeichenliste Reference list
1 Filterkörper1 filter body
2 durchgehende Sicke2 continuous beads
3 Abplattungen3 flattenings
4 Leim 4 glue
5 Faltenkante 5 fold edge
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4126126A DE4126126C2 (en) | 1991-08-07 | 1991-08-07 | Filter manufacturing process |
| DEP4126126.7 | 1991-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993002769A1 true WO1993002769A1 (en) | 1993-02-18 |
Family
ID=6437855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1992/001657 Ceased WO1993002769A1 (en) | 1991-08-07 | 1992-07-21 | Filter and method of manufacture |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE4126126C2 (en) |
| MX (1) | MX9204560A (en) |
| PL (1) | PL298862A1 (en) |
| TR (1) | TR26163A (en) |
| WO (1) | WO1993002769A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824581B1 (en) * | 2001-05-01 | 2004-11-30 | Dana Corporation | Pleated filter media with embossed spacers and cross flow |
| US7425227B1 (en) | 2004-06-17 | 2008-09-16 | Wix Filtration Corp Llc | Pleated filter element with offset emboss pattern |
| CN103977647A (en) * | 2013-02-12 | 2014-08-13 | 曼·胡默尔有限公司 | Filter body |
| US9084957B2 (en) | 2008-07-25 | 2015-07-21 | Donaldson Company, Inc. | Pleated filtration media, media packs, filter elements, and methods for filtering fluids |
| US9433884B2 (en) | 2007-06-26 | 2016-09-06 | Donaldson Company, Inc. | Filtration media pack, filter element, and methods |
| US9517430B2 (en) | 2007-02-02 | 2016-12-13 | Donaldson Company, Inc. | Air filtration media pack, filter element, air filtration media, and methods |
| US9808752B2 (en) | 2008-02-04 | 2017-11-07 | Donaldson Company, Inc. | Method and apparatus for forming fluted filtration media |
| US10058812B2 (en) | 2010-01-25 | 2018-08-28 | Donaldson Company, Inc. | Pleated filtration media having tapered flutes |
| US10363513B2 (en) | 2009-08-03 | 2019-07-30 | Donaldson Company, Inc. | Method and apparatus for forming fluted filtration media having tapered flutes |
| CN110177610A (en) * | 2016-06-24 | 2019-08-27 | K&N工程公司 | Composite air filter and method therefor |
| US12036503B2 (en) | 2019-06-07 | 2024-07-16 | Mann+Hummel Gmbh | Filter element and filter system |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4345122A1 (en) * | 1993-12-30 | 1995-07-06 | Detroit Holding Ltd | Process for manufacturing a filter insert |
| DE4345129A1 (en) * | 1993-12-30 | 1995-07-06 | Detroit Holding Ltd | Method of manufacturing a fluid filter |
| ES2167414T3 (en) * | 1993-12-30 | 2002-05-16 | Jacobi Systemtechnik Gmbh | INSERT FILTER AND PROCEDURE FOR MANUFACTURING. |
| DE4345130C1 (en) * | 1993-12-30 | 2000-11-23 | Jacobi Systemtechnik Gmbh | Hollow cylindrical filter element |
| DE19711230B4 (en) * | 1996-05-03 | 2011-09-15 | BLüCHER GMBH | Flat filter material with adsorptive properties |
| DE19735993A1 (en) * | 1997-08-19 | 1999-02-25 | Mann & Hummel Filter | Long-life filter element for e.g. hot oil, fuel and water |
| DE19755466A1 (en) * | 1997-12-03 | 1999-06-10 | Jacobi Systemtechnik Gmbh | Glue application for continuous filter element manufacture |
| FR2794798B1 (en) * | 1999-06-11 | 2004-10-29 | Filtrauto | FILTER ELEMENT FOR INTERNAL COMBUSTION ENGINE |
| DE10015951C2 (en) * | 1999-12-22 | 2002-09-26 | Jacobi Systemtechnik Gmbh | filter element |
| DE102014018233A1 (en) * | 2013-12-05 | 2015-06-11 | Mann + Hummel Gmbh | Filter element with filter bellows |
| DE102015122746B4 (en) | 2015-12-23 | 2020-10-29 | Neenah Gessner Gmbh | Filter material and filter element made from it |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1248618B (en) * | 1968-03-21 | Filterwerk Mann &. Hummel G.m.b.H., 7140 Ludwigsburg | Filter body made from a zigzag folded sheet of a relatively thin-walled filter material | |
| GB1429783A (en) * | 1972-03-11 | 1976-03-24 | Gen Motors Ltd | Fluid filter units |
| DE3300293A1 (en) * | 1983-01-07 | 1984-07-12 | Ing. Walter Hengst GmbH & Co KG, 4400 Münster | Filter body |
| US4615804A (en) * | 1984-08-30 | 1986-10-07 | Donaldson Company, Inc. | High density pleat spacing and scoring tool and filter made therewith |
| DE3390055C2 (en) * | 1982-06-18 | 1986-10-23 | Donaldson Co. Inc., Minneapolis, Minn. | Method of manufacturing a filter element and filter element produced thereafter |
-
1991
- 1991-08-07 DE DE4126126A patent/DE4126126C2/en not_active Expired - Lifetime
-
1992
- 1992-07-21 PL PL29886292A patent/PL298862A1/en unknown
- 1992-07-21 WO PCT/EP1992/001657 patent/WO1993002769A1/en not_active Ceased
- 1992-08-06 MX MX9204560A patent/MX9204560A/en unknown
- 1992-08-07 TR TR92/0765A patent/TR26163A/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1248618B (en) * | 1968-03-21 | Filterwerk Mann &. Hummel G.m.b.H., 7140 Ludwigsburg | Filter body made from a zigzag folded sheet of a relatively thin-walled filter material | |
| GB1429783A (en) * | 1972-03-11 | 1976-03-24 | Gen Motors Ltd | Fluid filter units |
| DE3390055C2 (en) * | 1982-06-18 | 1986-10-23 | Donaldson Co. Inc., Minneapolis, Minn. | Method of manufacturing a filter element and filter element produced thereafter |
| DE3300293A1 (en) * | 1983-01-07 | 1984-07-12 | Ing. Walter Hengst GmbH & Co KG, 4400 Münster | Filter body |
| US4615804A (en) * | 1984-08-30 | 1986-10-07 | Donaldson Company, Inc. | High density pleat spacing and scoring tool and filter made therewith |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824581B1 (en) * | 2001-05-01 | 2004-11-30 | Dana Corporation | Pleated filter media with embossed spacers and cross flow |
| US7425227B1 (en) | 2004-06-17 | 2008-09-16 | Wix Filtration Corp Llc | Pleated filter element with offset emboss pattern |
| US11612845B2 (en) | 2007-02-02 | 2023-03-28 | Donaldson Company, Inc. | Air filtration media pack, filter element, air filtration media, and methods |
| US9517430B2 (en) | 2007-02-02 | 2016-12-13 | Donaldson Company, Inc. | Air filtration media pack, filter element, air filtration media, and methods |
| US10786774B2 (en) | 2007-02-02 | 2020-09-29 | Donaldson Company, Inc. | Air filtration media pack, filter element, air filtration media, and methods |
| US11298645B2 (en) | 2007-06-26 | 2022-04-12 | Donaldson Company, Inc. | Filtration media pack, filter element, and methods |
| US9433884B2 (en) | 2007-06-26 | 2016-09-06 | Donaldson Company, Inc. | Filtration media pack, filter element, and methods |
| US12017177B2 (en) | 2007-06-26 | 2024-06-25 | Donaldson Company, Inc. | Filtration media pack, filter element, and methods |
| US10525397B2 (en) | 2007-06-26 | 2020-01-07 | Donaldson Company, Inc. | Filtration media pack, filter element, and methods |
| US9808752B2 (en) | 2008-02-04 | 2017-11-07 | Donaldson Company, Inc. | Method and apparatus for forming fluted filtration media |
| US9084957B2 (en) | 2008-07-25 | 2015-07-21 | Donaldson Company, Inc. | Pleated filtration media, media packs, filter elements, and methods for filtering fluids |
| US9855519B2 (en) | 2008-07-25 | 2018-01-02 | Donaldson Company, Inc. | Pleated filtration media, media packs, filter elements, and methods for filtering fluids |
| US10946313B2 (en) | 2008-07-25 | 2021-03-16 | Donaldson Company, Inc. | Pleated filtration media, media packs, filter elements, and methods for filtering fluids |
| US12048888B2 (en) | 2008-07-25 | 2024-07-30 | Donaldson Company, Inc. | Pleated filtration media, media packs, filter elements, and methods for filtering fluids |
| US10363513B2 (en) | 2009-08-03 | 2019-07-30 | Donaldson Company, Inc. | Method and apparatus for forming fluted filtration media having tapered flutes |
| US11413563B2 (en) | 2010-01-25 | 2022-08-16 | Donaldson Company, Inc. | Pleated filtration media having tapered flutes |
| US10058812B2 (en) | 2010-01-25 | 2018-08-28 | Donaldson Company, Inc. | Pleated filtration media having tapered flutes |
| CN103977647A (en) * | 2013-02-12 | 2014-08-13 | 曼·胡默尔有限公司 | Filter body |
| CN110177610A (en) * | 2016-06-24 | 2019-08-27 | K&N工程公司 | Composite air filter and method therefor |
| US12036503B2 (en) | 2019-06-07 | 2024-07-16 | Mann+Hummel Gmbh | Filter element and filter system |
Also Published As
| Publication number | Publication date |
|---|---|
| TR26163A (en) | 1995-02-15 |
| DE4126126C2 (en) | 1998-02-12 |
| MX9204560A (en) | 1993-02-01 |
| PL298862A1 (en) | 1993-11-02 |
| DE4126126A1 (en) | 1993-02-11 |
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