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WO2006014941A2 - Système constitué d'un ensemble de couches filtrantes en z et procédés - Google Patents

Système constitué d'un ensemble de couches filtrantes en z et procédés Download PDF

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Publication number
WO2006014941A2
WO2006014941A2 PCT/US2005/026465 US2005026465W WO2006014941A2 WO 2006014941 A2 WO2006014941 A2 WO 2006014941A2 US 2005026465 W US2005026465 W US 2005026465W WO 2006014941 A2 WO2006014941 A2 WO 2006014941A2
Authority
WO
WIPO (PCT)
Prior art keywords
media
media pack
filter cartridge
seal arrangement
housing seal
Prior art date
Application number
PCT/US2005/026465
Other languages
English (en)
Other versions
WO2006014941A3 (fr
Inventor
Rodger I. Spears
Original Assignee
Donaldson Company, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Donaldson Company, Inc. filed Critical Donaldson Company, Inc.
Publication of WO2006014941A2 publication Critical patent/WO2006014941A2/fr
Publication of WO2006014941A3 publication Critical patent/WO2006014941A3/fr

Links

Classifications

    • 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
    • B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/001—Making filtering elements not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/22—Cell-type filters
    • B01D25/24—Cell-type roll filters
    • 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
    • B01D46/0001—Making filtering elements
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/52—Filter identification means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings
    • B01D2271/027—Radial sealings

Definitions

  • the present disclosure relates to filter media for use in filtering liquids or gases.
  • the disclosure particularly relates to media packs that use z-filter media which comprises a fluted media sheet secured to facing sheet, formed into a media pack.
  • the disclosure relates to formation of such media packs and their inclusion in serviceable filter cartridge arrangements, typically for use in air cleaners. Methods of assembly and use are also described.
  • Fluid streams such as air
  • Fluid streams can carry contaminant material therein.
  • air flow streams to engines for example combustion air
  • gas streams to gas turbine systems and air streams to various combustion furnaces carry particulate contaminant therein that should be filtered.
  • selected contaminant material been removed from (or have its level reduced in) the fluid.
  • a variety of fluid filter (for example air cleaner) arrangements have been developed for contaminant reduction. However, continued improvements are sought.
  • features useable in preferred filter cartridges such as air filter cartridges are provided.
  • the features can be used together to provide a preferred filter cartridge, however some advantageous cartridges can be constructed to use only selected ones of the features.
  • methods of construction and use are provided.
  • an air filter cartridge arrangement comprising a z-filter media pack having opposite first and second ends, with inlet and outlet flutes extending therebetween.
  • the media pack is generally formed from a fluted sheet of media secured to a facing sheet of media.
  • the media pack is coiled.
  • the media pack has first and second opposite flow faces or ends, one operating as an inlet flow face and the other as an outlet flow face.
  • the media pack has a sidewall, extending axially between the end faces.
  • the media pack typically, especially if coiled, includes a central core volume.
  • the air filter cartridge includes a housing seal arrangement molded on to the media pack sidewall and positioned at a location along the media pack sidewall, from the first flow face, a distance of less than 40% of the length of extension of the sidewall between the opposite flow faces. Preferably it is positioned at a distance of less than 30% of that length, from the first flow face.
  • the housing seal arrangement can be positioned adjacent the first flow face. Preferably at least 40% of the media pack axial length is not covered by molded material integrally molded with the housing seal arrangement.
  • integrally molded in this context, reference is meant to regions of molded material mold from the same resin pool.
  • the housing seal arrangement is a radial seal. Typically and preferably it is positioned to begin at a location within 20 mm of the first flow face.
  • the preferred radial housing seal arrangement is configured to taper downwardly in thickness, in extension toward the second flow face. To accomplish this, it can be provided with an outer, annular, stepped sealing surface.
  • the radial housing seal arrangement includes a tip positioned remotely from the first end surface, the tip being spaced outwardly from the media pack sidewall, by a gap.
  • the gap would be an artifact from a particular preferred method of formation described herein.
  • the media pack is provided with an adhesive sheet, such as a label, thereon tacking a tail end of the coiled media against itself.
  • the housing seal arrangement is molded in extension over a portion of the adhesive sheet, securing the adhesive sheet to the media pack, preferably leaving a portion of the adhesive sheet exposed to view.
  • plug arrangement for positioning within the central core volume of the media pack.
  • the plug arrangement preferably extends axially, through the media pack, a distance of no more than 40% of the axial length of the media pack, typically and preferably no more than 30% of that length.
  • the plug arrangement is positioned aligned with, or adjacent, the same flow face of the media pack of the housing seal arrangement.
  • an optional polymeric bead can be positioned at the media pack on a sidewall thereof, spaced toward the second end face from the housing seal arrangement. Preferred locations and shapes can be used, with respect to wear on the media pack in use.
  • One method described herein involves positioning a circumferential seal bead on a sidewall of a z-filter media pack arrangement having opposite flow faces.
  • the step of positioning is described as including positioning the seal bead at a location within a distance, along a sidewall from the first flow face, of no more than 40% of the axial length of the sidewall.
  • a mold ring preferably a continuous, integral, mold ring, against the seal bead by passage over the first flow face of the media pack is described.
  • the mold ring is configured for formation of a housing seal arrangement.
  • a step of molding a housing seal arrangement within the mold and around the media pack preferably with at least a portion of the housing ring being sealed directly to the media pack, in particular directly to the facing sheet (i.e., with a portion of the seal arrangement in physical contact with the facing sheet).
  • a follow-up step of removing the mold ring from around the media pack by passage over the second flow face of the media pack is a step of molding a housing seal arrangement within the mold and around the media pack, preferably with at least a portion of the housing ring being sealed directly to the media pack, in particular directly to the facing sheet (i.e., with a portion of the seal arrangement in physical contact with the facing sheet).
  • An option described with respect to the process is positioning an adhesive sheet over a portion of the media pack, for example over some or all of a tail end of the media coil, on the sidewall.
  • the step of positioning the mold ring could preferably involve positioning the mold ring such that at least a portion of the resulting molded housing seal arrangement extends over at least a portion of the adhesive sheet, preferably leaving a portion of the adhesive sheet accessible to view.
  • Also described herein as a method of sealing a tail end and a lead end of sections of a media strip comprising a fluted sheet secured to a facing sheet; the sealing being between the fluted sheet and the facing sheet.
  • the method described involves inserting a line of sonically weldable polymeric material into at least one flute, and typically two adjacent corrugation flutes of the fluted sheet, between the fluted sheet and the facing sheet.
  • a step of sonically welding the involved flute(s) closed to form a closed section of media the step typically involving both application of sonic energy and crushing energy to the fluted sheet in this region.
  • a follow-up step of cutting the media along the closed section of the media is provided, to create at least one sealed end, typically adjacent lead and tail ends, of adjacent sections of media strip.
  • FIG. 1 is a fragmentary, schematic, perspective view of z-filter media useable in arrangements according to the present disclosure.
  • Fig. 2 is a schematic, cross-sectional view of a portion of the media depicted in Fig. 1.
  • Fig. 3 is a schematic view of examples of various corrugated media definitions.
  • Fig. 4 is a schematic view of a useable process for manufacturing media according to the present disclosure.
  • Fig. 5 is a cross-sectional view of an optional end dart for media flutes useable in arrangements according to the present disclosure.
  • Fig. 6 is a perspective view of a filter cartridge according to the present disclosure.
  • Fig. 7 is a schematic cross-sectional view of the filter cartridge of Fig. 6.
  • Fig. 8 is a cross-sectional view analogous to Fig. 7, showing a mold piece for molding a seal arrangement of the filter cartridge of Figs. 6 and 7.
  • Fig. 9 schematically depicts steps in a process of forming a filter cartridge according to Figs. 6 and 7.
  • Fig. 10 depicts a step of forming a portion of a lead end seal and tail end seal for media strips useable in the arrangement of Figs. 6 and 7.
  • Fluted filter media can be used to provide fluid filter constructions in a variety of manners.
  • One well known manner is as a z-filter construction.
  • the term "z-filter construction" as used herein, is meant to refer to a filter construction in which individual ones of corrugated, folded or otherwise formed filter flutes are used to define sets of longitudinal, typically parallel, inlet and outlet filter flutes for fluid flow through the media; the fluid flowing along the length of the flutes between opposite inlet and outlet flow ends (or flow faces) of the media.
  • Some examples of z-filter media are provided in U.S.
  • One type of z-filter media utilizes two specific media components joined together, to form the media construction.
  • the two components are: (1) a fluted (typically corrugated) media sheet; and, (2) a facing media sheet.
  • the facing media sheet is typically non-corrugated, however it can be corrugated, for example perpendicularly to the flute direction as described in U.S. provisional 60/543,804, filed February 11, 2004, incorporated herein by reference.
  • the fluted (typically corrugated) media sheet and the facing media sheet together are used to define media having parallel inlet and outlet flutes.
  • the fluted sheet and non-fluted sheet are secured together and are then coiled to form a z-filter media construction.
  • Such arrangements are described, for example, in U.S. 6,235,195 and 6,179,890, each of which is incorporated herein by reference.
  • some non-coiled sections of fluted media secured to flat media are stacked on one another, to create a filter construction. An example of this is described in Fig. 11 of 5,820,646, incorporated herein by reference.
  • coiled arrangements are preferred.
  • coiling of the fluted sheet/facing sheet combination around itself, to create a coiled media pack is conducted with the facing sheet directed outwardly.
  • Some techniques for coiling are described in U.S. provisional application 60/467,521, filed May 2, 2003 and PCT Application US 04/07927, filed March 17, 2004, each of which is incorporated herein by reference.
  • the resulting coiled arrangement generally has, as the outer surface of the media pack, a portion of the facing sheet, as a result.
  • corrugated used herein to refer to structure in media, is meant to refer to a flute structure resulting from passing the media between two corrugation rollers, i.e., into a nip or bite between two rollers, each of which has surface features appropriate to cause a corrugation affect in the resulting media.
  • corrugation is not meant to refer to flutes that are formed by techniques not involving passage of media into a bite between corrugation rollers.
  • corrugated is meant to apply even if the media is further modified or deformed after corrugation, for example by the folding techniques described in PCT WO 04/007054, published January 22, 2004, incorporated herein by reference.
  • Corrugated media is a specific form of fluted media.
  • Fluted media is media which has individual flutes (for example formed by corrugating or folding) extending thereacross.
  • Serviceable filter element or filter cartridge configurations utilizing z- filter media are sometimes referred to as "straight through flow configurations" or by variants thereof.
  • the serviceable filter elements generally have an inlet flow end (or face) and an opposite exit flow end (or face), with flow entering and exiting the filter cartridge in generally the same straight through direction.
  • the term "serviceable” in this context is meant to refer to a media containing filter cartridge that is periodically removed and replaced from a corresponding fluid cleaner.
  • each of the inlet flow end and outlet flow end will be generally flat or planar, with the two parallel to one another. However, variations from this, for example non-planar faces are possible.
  • a straight through flow configuration (especially for a coiled media pack) is, for example, in contrast to serviceable filter cartridges such as cylindrical pleated filter cartridges of the type shown in U.S. Patent No. 6,039,778, incorporated herein by reference, in which the flow generally makes a turn as its passes through the serviceable cartridge. That is, in a 6,039,778 filter, the flow enters the cylindrical filter cartridge through a cylindrical side, and then turns to exit through an end face (in forward-flow systems). In a typical reverse-flow system, the flow enters the serviceable cylindrical cartridge through an end face and then turns to exit through a side of the cylindrical filter cartridge. An example of such a reverse-flow system is shown in U.S. Patent No. 5,613,992, incorporated by reference herein.
  • z- filter media construction and variants thereof as used herein, without more, is meant to refer to any or all of: a web of corrugated or otherwise fluted media secured to (facing) media with appropriate sealing to allow for definition of inlet and outlet flutes; or, such a media coiled or otherwise constructed or formed into a three dimensional network of inlet and outlet flutes; and/or, a filter construction including such media.
  • Fig. 1 an example of media 1 useable in z-filter media is shown.
  • the media 1 is formed from a corrugated sheet 3 and a facing sheet 4.
  • the corrugated sheet 3, Fig. 1 is of a type generally characterized herein as having a regular, curved, wave pattern of flutes or corrugations 7.
  • wave pattern in this context, is meant to refer to a flute or corrugated pattern of alternating troughs 7b and ridges 7a.
  • regular in this context is meant to refer to the fact that the pairs of troughs and ridges (7b, 7a) alternate with generally the same repeating corrugation (or flute) shape and size.
  • each trough 7b is substantially an inverse of each ridge 7a.
  • regular is thus meant to indicate that the corrugation (or flute) pattern comprises troughs and ridges with each pair (comprising an adjacent trough and ridge) repeating, without substantial modification in size and shape of the corrugations along at least 70% of the length of the flutes.
  • substantially in this context, refers to a modification resulting from a change in the process or form used to create the corrugated or fluted sheet, as opposed to minor variations from the fact that the media sheet 3 is flexible.
  • the media 1 could be terminated, for example, between a pair comprising a ridge and a trough, or partially along a pair comprising a ridge and a trough.
  • the media 1 depicted in fragmentary has eight complete ridges 7a and seven complete troughs 7b.
  • the opposite flute ends may vary from one another. Such variations in ends are disregarded in these definitions, unless specifically stated. That is, variations in the ends of flutes are intended to be covered by the above definitions.
  • curved is meant to refer to a corrugation pattern that is not the result of a folded or creased shape provided to the media, but rather the apex 7a of each ridge and the bottom 7b of each trough is formed along a radiused curve.
  • a typical radius for such z-filter media would be at least 0.25 mm and typically would be not more than 3 mm. (Media that is not curved, by the above definition, can also be useable.)
  • trough 7b is a concave region
  • ridge 7a is a convex region.
  • trough 7b of side 3a forms a ridge
  • ridge 7a of face 3a forms a trough.
  • region 30 can be a straight segment, instead of a point, with curvature inverting at ends of the segment 30.
  • a characteristic of the particular regular, curved, wave pattern corrugated sheet 3 shown in Fig. 1, is that the individual corrugations are generally straight.
  • straight in this context, it is meant that through at least 70% (typically at least 80%) of the length between edges 8 and 9, the ridges 7a and troughs 7b do not change substantially in cross-section.
  • Fig. 1 of WO 97/40918 and PCT Publication WO 03/47722, published June 12, 2003, incorporated herein by reference.
  • the tapered flutes of Fig. 1 of WO 97/40918 would be a curved wave pattern, but not a "regular" pattern, or a pattern of straight flutes, as the terms are used herein.
  • the media 1 has first and second opposite edges 8 and 9.
  • edge 9 When the media 1 is coiled and formed into a media pack, in general edge 9 will form an inlet end for the media pack and edge 8 an outlet end, although an opposite orientation is possible.
  • Adjacent edge 8 is provided sealant, in this instance in the form of a sealant bead 10, sealing the corrugated (fluted) sheet 3 and the facing sheet 4 together.
  • Bead 10 will sometimes be referred to as a "single facer" bead, since it is a bead between the corrugated sheet 3 and facing sheet 4, which forms the single facer or media strip 1.
  • Sealant bead 10 seals closed individual flutes 11 adjacent edge 8, to passage of air therefrom.
  • Adjacent edge 9 is provided sealant, in this instance in the form of a seal bead 14.
  • Seal bead 14 generally closes flutes 15 to passage of unfiltered fluid therein, adjacent edge 9.
  • Bead 14 would typically be applied as the media 1 is coiled about itself, with the corrugated sheet 3 directed to the inside. Thus bead 14 will form a seal between a back side 17 of facing sheet 4, and side 18 of the corrugated sheet 3.
  • the bead 14 will sometimes be referred to as a "winding bead” since it is typically applied, as the strip 1 is coiled into a coiled media pack. If the media 1 is cut in strips and stacked, instead of coiled, bead 14 would be a "stacking bead.”
  • the media 1 can be operated as follows. First, air in the direction of arrows 12, would enter open flutes 11 adjacent end 9. Due to the closure at end 8, by bead 10, the air would pass through the media shown by arrows 13. It could then exit the media pack, by passage through open ends 15a of the flutes 15, adjacent end 8 of the media pack. Of course operation could be conducted with air flow in the opposite direction.
  • the parallel corrugations 7a, 7b are generally straight completely across the media, from edge 8 to edge 9.
  • Straight flutes or corrugations can be deformed or folded at selected locations, especially at ends. Modifications at flute ends for closure are generally disregarded in the above definitions of "regular,” “curved” and “wave pattern.”
  • Z-filter constructions which do not utilize straight, regular curved wave pattern corrugation (flute) shapes are known.
  • U.S. 5,562,825 corrugation patterns which utilize somewhat semicircular (in cross section) inlet flutes adjacent narrow V-shaped (with curved sides) exit flutes are shown (see Figs. 1 and 3, of 5,562,825).
  • the filter media is a relatively flexible material, typically a non-woven fibrous material (of cellulose fibers, synthetic fibers or both) often including a resin therein, sometimes treated with additional materials.
  • a non-woven fibrous material of cellulose fibers, synthetic fibers or both
  • it can be conformed or configured into the various corrugated patterns, without unacceptable media damage.
  • it can be readily coiled or otherwise configured for use, again without unacceptable media damage.
  • it must be of a nature such that it will maintain the required corrugated configuration, during use.
  • the media contains a resin.
  • the media can be heated to above the glass transition point of the resin. When the resin then cools, it will help to maintain the fluted shapes.
  • the media of the corrugated sheet 3 facing sheet 4 or both can be provided with a fine fiber material on one or both sides thereof, for example in accord with U.S. 6,673,136, incorporated herein by reference.
  • a z-filter media construction 40 utilizing a regular, curved, wave pattern corrugated sheet 43, and a non-corrugated flat sheet 44 is depicted.
  • the distance Dl, between points 50 and 51, defines the extension of flat media 44 in region 52 underneath a given corrugated flute 53.
  • the length D2 of the arcuate media for the corrugated flute 53, over the same distance Dl is of course larger than Dl, due to the shape of the corrugated flute 53.
  • the linear length D2 of the media 53 between points 50 and 51 will generally be at least 1.2 times Dl.
  • D2 would be within a range of 1.2 - 2.0, inclusive.
  • D2 is about 1.25 - 1.35 x Dl.
  • Such media has, for example, been used commercially in Donaldson PowercoreTM Z-filter arrangements.
  • the ratio D2/D1 will sometimes be characterized as the flute/flat ratio or media draw for the corrugated media.
  • various standard flutes have been defined. For example the standard E flute, standard X flute, standard B flute, standard C flute and standard A flute. Figure 3, attached, in combination with Table A below provides definitions of these flutes.
  • Donaldson Company, Inc. (DCI) the assignee of the present disclosure, has used variations of the standard A and standard B flutes, in a variety of z-filter arrangements. These flutes are also defined in Table A and Fig. 3.
  • standard flute configurations from the corrugated box industry can be used to define corrugation shapes or approximate corrugation shapes for corrugated media. Comparisons above between the DCI A flute and DCI B flute, and the corrugation industry standard A and standard B flutes, indicate some convenient variations.
  • FIG. 4 one example of a manufacturing process for making a media strip corresponding to strip 1, Fig. 1 is shown.
  • facing sheet 64 and the fluted (corrugated) sheet 66 having flutes 68 are brought together to form a media web 69, with an adhesive bead located therebetween at 70.
  • the adhesive bead 70 will form a single facer bead 10, Fig. 1.
  • An optional darting process occurs at station 71 to form center darted section 72 located mid- web.
  • the z-filter media or Z-media strip 74 can be cut or slit at 75 along the bead 70 to create two pieces 76, 77 of z-filter media 74, each of which has an edge with a strip of sealant (single facer bead) extending between the corrugating and facing sheet.
  • a strip of sealant single facer bead
  • the edge with a strip of sealant would also have a set of flutes darted at this location.
  • Fig. 4 are described in PCT WO 04/007054, published January 22, 2004 incorporated herein by reference.
  • the z- filter media 74 before the z- filter media 74 is put through the darting station 71 and eventually slit at 75, it must be formed.
  • this is done by passing a sheet of media 92 through a pair of corrugation rollers 94, 95.
  • the sheet of media 92 is unrolled from a roll 96, wound around tension rollers 98, and then passed through a nip or bite 102 between the corrugation rollers 94, 95.
  • the corrugation rollers 94, 95 have teeth 104 that will give the general desired shape of the corrugations after the flat sheet 92 passes through the nip 102.
  • the sheet 92 After passing through the nip 102, the sheet 92 becomes corrugated across the machine direction and is referenced at 66 as the corrugated sheet.
  • the corrugated sheet 66 is then secured to facing sheet 64. (The corrugation process may involve heating the media; in some instances.)
  • the process also shows the facing sheet 64 being routed to the darting process station 71.
  • the facing sheet 64 is depicted as being stored on a roll 106 and then directed to the corrugated sheet 66 to form the Z- media 74.
  • the corrugated sheet 66 and the facing sheet 64 are secured together by adhesive or by other means (for example by sonic welding).
  • an adhesive line 70 is shown used, to secure corrugated sheet 66 and facing sheet 64 together, as the sealant bead.
  • the sealant bead for forming the facing bead could be applied as shown as 70a. If the sealant is applied at 70a, it may be desirable to put a gap in the corrugation roller 95, and possibly in both corrugation rollers 94, 95, to accommodate the bead 70a.
  • the type of corrugation provided to the corrugated media is a matter of choice, and will be dictated by the corrugation or corrugation teeth of the corrugation rollers 94, 95.
  • One preferred corrugation pattern will be a regular curved wave pattern corrugation, of straight flutes, as defined herein above.
  • Fig. 5 shows, in cross-section, one of the flutes 68 after darting and slitting.
  • a fold arrangement 118 can be seen to form a darted flute 120 with four creases 121a, 121b, 121c, 121d.
  • the fold arrangement 118 includes a flat first layer or portion 122 that is secured to the facing sheet 64.
  • a second layer or portion 124 is shown pressed against the first layer or portion 122.
  • the second layer or portion 124 is preferably formed from folding opposite outer ends 126, 127 of the first layer or portion 122.
  • two of the folds or creases 121a, 121b will generally be referred to herein as "upper, inwardly directed" folds or creases.
  • the term "upper” in this context is meant to indicate that the creases lie on an upper portion of the entire fold 120, when the fold 120 is viewed in the orientation of Fig. 5.
  • the term “inwardly directed” is meant to refer to the fact that the fold line or crease line of each crease 121a, 121b, is directed toward the other.
  • creases 121c, 121 d will generally be referred to herein as “lower, outwardly directed” creases.
  • the term “lower” in this context refers to the fact that the creases 121c, 121d are not located on the top as are creases 121a, 121b, in the orientation of Fig. 5.
  • the term “outwardly directed” is meant to indicate that the fold lines of the creases 121c, 12 Id are directed away from one another.
  • a preferred regular fold arrangement 118 according to Fig. 5 in this disclosure is one which includes at least two "upper, inwardly directed, creases.” These inwardly directed creases are unique and help provide an overall arrangement in which the folding does not cause a significant encroachment on adjacent flutes.
  • a third layer or portion 128 can also be seen pressed against the second layer or portion 124. The third layer or portion 128 is formed by folding from opposite inner ends 130, 131 of the third layer 128.
  • the first layer or portion 122 is formed from an inverted ridge.
  • the second layer or portion 124 corresponds to a double peak (after inverting the ridge) that is folded toward, and in preferred arrangements, folded against the inverted ridge.
  • Techniques described herein are particularly well adapted for use in media packs that result from coiling a single sheet comprising a corrugated sheet/facing sheet combination, i.e., a "single facer" strip. Certain of the techniques can be applied with arrangements that, instead of being formed by coiling, are formed from a plurality of strips of single facer.
  • Coiled media pack arrangements can be provided with a variety of peripheral perimeter definitions, hi this context the term "peripheral, perimeter definition" and variants thereof, is meant to refer to the outside perimeter shape defined, looking at either the inlet end or the outlet end of the media pack. Typical shapes are circular as described in PCT WO 04/007054 and PCT application US
  • obround Other useable shapes are obround, some examples of obround being oval shape.
  • oval shapes In general oval shapes have opposite curved ends attached by a pair of opposite sides. In some oval shapes, the opposite sides are also curved, hi other oval shapes, sometimes called racetrack shapes, the opposite sides are generally straight. Racetrack shapes are described for example in PCT WO 04/007054 and PCT application US 04/07927.
  • Another way of describing the peripheral or perimeter shape is by defining the perimeter resulting from taking a cross-section through the media pack in a direction orthogonal to the winding access of the coil.
  • Opposite flow ends or flow faces of the media pack can be provided with a variety of different definitions, hi many arrangements, the ends are generally flat and perpendicular to one another.
  • the end faces include tapered, coiled, stepped portions which can either be defined to project axially outwardly from an axial end of the side wall of the media pack; or, to project axially inwardly from an end of the side wall of the media pack.
  • the flute seals (for example from the single facer bead, winding bead or stacking bead) can be formed from a variety of materials.
  • hot melt or polyurethane seals are described as possible for various applications.
  • the reference numeral 200, Fig. 6, indicates an example air filter cartridge according to the present disclosure.
  • An air filter cartridge 200 such as that shown in the drawings, would typically be used by being inserted within an air cleaner housing of an air cleaner for use to filter air being directed into the engine air intake of an internal combustion engine or other equipment.
  • the air filter cartridge 200 is a serviceable item, and is typically removed and replaced within the operating lifetime of the equipment within which it is used.
  • the filter cartridge 200 comprises a media pack 201 and a housing seal arrangement 202.
  • the particular filter cartridge 200 shown also includes a central core volume 203a having central core or plug member 203 projecting therein. (It is noted that in Fib. 6 and in similar figures, the detail of flute ends is not shown.)
  • the media pack 201 includes opposite flow surfaces 205 and 206.
  • surfaces 205 and 206 are each planar, and are parallel to one another.
  • the media pack 201 also includes an outer sidewall 207, in this instance comprising a portion of facing sheet.
  • the length of the sidewall 207 in extension between surfaces 205 and 206 is generally referred to as an axial length or extension of the sidewall 207.
  • a length of central core volume 203 a in extension between surfaces 205 and 206 is referred to as the axial length of core volume 203a.
  • the term "axial" in this context is generally meant to refer to a flow direction through the media pack 201, between opposite flow surfaces 205, 206.
  • the media pack 201 would typically comprise a coiled strip of z- filter media, in accord with the descriptions of Sections I and II above.
  • air would flow axially through the media pack 201 in direction from one of the flow surfaces 205, 206 to an opposite one, in normal operation.
  • the direction of air flow through the media pack 201 is a matter of choice.
  • end face 205 will be considered the dirty air inlet flow face and flow face 206 will be considered the exit flow face for filtered air. This would be typical, for a cartridge configured like cartridge 200.
  • the seal arrangement 202 and the housing seal arrangement 202a is configured to form a seal between the filter cartridge 200 and an air cleaner housing, when the filter cartridge 200 is installed for use.
  • This housing seal arrangement 202 in operation, prevents unfiltered air from bypassing the media pack 201, in normal installation and use in an air cleaner.
  • the core or plug arrangement 203 includes projection 210 thereon.
  • the projection 210 provides a convenient structure for manipulating filter cartridge 200 into and out of secure sealing engagement with an air cleaner, during use.
  • projection 210 includes a handle 210a, with a central hole.
  • projection 210 can be used to engage or align with portions of an air cleaner housing, when filter cartridge 200 is installed for use.
  • a variety of shapes of projection 210 can be used, the one 210a shown merely being an example.
  • the housing seal arrangement 202 is an outside radial seal 202a.
  • housing in this context, it is meant that the seal arrangement 202 is configured to seal against a portion of an air cleaner housing, in use.
  • radial in this context, it is meant that the seal surface 212 of the seal arrangement 202 is generally a radially directed surface, positioned annularly or peripherally around seal arrangement 202, to form a seal with seal forces directed radially with respect to central core volume 203a (or from a central axis passing through core volume 203a.
  • Fig. 7 in which filter cartridge 200 is depicted (schematically) in cross-section, hi Fig. 7, media flute detail is not depicted. Referring to Fig.
  • seal arrangement 202 is, at least in part, secured directly to media pack 201, in this instance in part to a portion of the facing sheet, hi particular, although alternatives are possible in typical arrangements the seal arrangement 202 will be molded at least partially directly onto the media pack 201, during manufacture; the term "directly” in this context meaning "in physical contact with.” A process for accomplishing this is described below. It is noted that particular seal arrangement 202 shown includes a projection tip 219 remote from surface 205 and toward surface 206, that is spaced from media pack 201 , by a gap 220. This gap is an artifact from a preferred method of manufacture, described below.
  • housing seal arrangement 202 include edge 221.
  • Edge 221 is a portion of housing seal arrangement 202 directed generally in the direction of end face 205 and from end face 206.
  • tip 221 is positioned, within an axial distance of sidewall 207 from end face 205 toward end face 206, a distance of no more than 20 mm, preferably no more than 10 mm, and, in some preferred instances, tip 221 is aligned with surface 205 as shown in Fig. 7.
  • the total axial extension of the housing seal arrangement 202 between edge 221 and tip 219 is no more than 60 mm, more preferably no more than 40 mm, typically no more than 30 mm.
  • seal surface 212 is irregular; i.e., not flat and smooth.
  • the particular seal surface shown generally tapers inwardly (or downwardly in thickness) from point 222 toward point 223, i.e., the seal dimension tapers inwardly in a direction of extension along the seal surface 212 from flow face 205 toward flow face 206.
  • seal arrangement 202 is thicker (radially) than it is in region 223.
  • the extent of axial extension (distance from edge 221 to tip 219) of seal arrangement 202 along side 201a of media pack 201 is no more than 40% of a distance between surfaces 205, 206, (i.e., the axial length of side 201a) typically no more than 30% of this distance and often no more than 20% of this distance.
  • at least 40% of the total axial extension of the media pack 201 is not covered with material molded integral with the housing seal arrangement 202.
  • the particular irregular seal surface 212 shown is stepped in three steps 212a, 212b and 212c. This will facilitate insertion, with the normal insertion direction being in the direction of arrow 225, i.e., in a direction from flow face 205 toward flow face 206.
  • the term "normal insertion direction" with respect to the seal arrangement 202 is meant to refer to direction of axial forces during insertion into sealing relationship with an air cleaner housing, for use.
  • optional plug 203 is viewable in cross- section, comprising plug material 227 having projection 210 embedded therein.
  • Fig. 8. hi Fig. 8 the filter cartridge is depicted during a step of manufacture with mold piece 230 thereon.
  • Seal arrangement 202, Fig. 7, would typically be molded, by placing an appropriate curable resin in interior 231 of mold piece, between the mold piece 231 and the media pack 201.
  • the mold piece 230 is temporarily secured in position on media pack 201, by resting on axial bead 233. This operation is described in greater detail, in connection with Fig. 9.
  • the housing seal arrangement 202 can be formed from a variety of polymeric materials, hi many applications polyurethane material will be chosen. In some instances polyurethane foam will be preferred; the polyurethane being selected such as to form a housing seal arrangement 202 having an as-molded density, preferably, of no greater than 30 lbs/cu. ft. (0.48 g/cc) and typically no greater than 22 lbs/cu. ft. (0.35 g/cc), usually at least 5 lbs/cu.ft. (0.08 g/cc) and typically at least 10 lbs/cu.ft. (0.16 g/cc).
  • housing seal arrangement 202 is a radial seal due to: (a) cost and weight concerns; and (b) the preference for the material to crush or compress in radial thickness, when cartridge 202 is positioned for use in a housing of an air cleaner.
  • a media pack 241 (with opposite end faces 247, 248) useable for a media pack 201 in filter cartridge 200, Fig. 6, is provided.
  • the media pack 241 depicted is cylindrical, comprising a strip of single facer material 242 coiled in this instance in a cylindrical shape, with tail end 243.
  • Tail end 243 is shown secured down by label or adhesive sheet 245.
  • label or adhesive sheet is meant to refer to a sheet of material that may for example having printing and/or pictorial information thereon, and which has a side with adhesive thereon securing the label or sheet against the media pack 201.
  • the label or adhesive sheet 245 may be, for example, a printed label having a pressure sensitive adhesive thereon, although alternatives are possible.
  • media pack 241 is shown with bead 251 having been positioned thereon, spaced from end 247.
  • bead 251 will be formed from a thixotropic material such as a hot melt or polyurethane material. It would typically be spaced from end 247, by a distance of at least 5 mm and typically at least 10 mm, and usually not more than 50 mm, and typically not more than 40 mm.
  • mold ring 230 is also in positioned mold ring 230.
  • the preferred mold ring 230 depicted is a continuous circular, integral piece.
  • the mold ring 230 is a single piece with no joints, seams, or separation points therein.
  • the mold ring 230 would be lowered over end 247, until inner projection 255 engages bead 251, as shown in Fig. 8.
  • thixotropic material is chosen for bead 251 , a sufficient seal will form between the mold ring 230 and the media pack 241 at this location, to hold liquid resin within the mold ring 230 during a molding process.
  • Useable thixotropic materials include thixotropic urethane materials. Referring to Fig. 8, the interior wall 231 of mold ring 230, which forms the side surface of the annular wall around mold 253, is appropriately configured to form outside surface 212 of the seal arrangement 202.
  • a liquid resin (to be cured to form the housing seal arrangement 202), will be poured into the mold ring 230, through upper (open) end 257. After the resin cures, it will form the selected seal arrangement 202, Fig. 6, molded directly to the media pack 241. Also, in region 259, the seal ring will engulf the tail end 243, sealing the tail end 243 at this location, between the outer most tip of the media strip and the next underneath coil. In some applications, region 259 is positioned in overlap with a winding bead of the media pack 241.
  • the thixotropic bead 251 and seal arrangement 202 can be positioned to engage (overlap) an end portion 260 of the label or sheet 245.
  • the end portion 260 of the label or sheet 245 will be further secured on the media pack 241, after molding of the housing seal arrangement 202.
  • An advantage from this, is that the adhesive of the label or sheet 245 is not solely relied upon, to maintain the label or sheet 245 secured to the media pack 201, through the lifetime of use of the filter cartridge 200. Rather the label or sheet 245 cannot easily be separated from the remainder of the media pack 201, due to the fact that the label or sheet 245 is partly secured under thixotropic bead 251 and/or housing seal arrangement 202.
  • filter cartridge 200 is shown, with ring 230 having been removed by passage past (over) end surface 248 in the direction of arrow 271.
  • the mold ring 253 is inserted over one end surface 247 of the media pack 241 and is removed over the other end surface 248.
  • the thixotropic material of the bead 251 will have been chosen such that the mold 230 does not become adhered to it, and the mold 230 can be pushed pass the thixotropic material to be removed as shown at station 270. In some instances, the thixotropic bead will be stripped or partially stripped during removal of the mold.
  • optional core or plug arrangement 203 has been positioned within central core volume 203 a of the media pack 241.
  • the handle 210 would be pushed into end 203b of the core volume 203a.
  • Flared prongs 273, Fig. 8, can be used to hold the handle 210 in position.
  • Core material 227 would be poured into the region 275 as a liquid, and be allowed to cure in this region, to form the plug 203.
  • region 275 is positioned in overlap with the winding bead of the media pack 201. As a result material 227 will seal a lead end of the media pack, between the end of the lead end and the next outer coil, at this region.
  • plug arrangement 203 could be preformed molding resin to handle arrangement 210.
  • the preform plug could then be pushed into core volume 203 a.
  • the seal could result from additional adhesive applied around the outside of the preformed plug arrangement, or with reliance upon winding bead sealant at this location.
  • the projection 210 is positioned adjacent a same end of the media pack 201 as the housing seal arrangement 202.
  • Alternatives are possible.
  • the lead end and tail end of the media pack also should be sealed between the corrugated sheet and the facing sheet, of the single facer strip. A process for accomplishing this is shown schematically in Fig. 10.
  • a continuous strip of single facer material comprising corrugated (or fluted) sheet 281 secured to facing sheet 282.
  • a strip 286 of material are shown inserted into at least one, and typically into two adjacent, corrugations (flutes) 287.
  • the strips 286 would typically comprise an ultrasonically weldable polymeric material, inserted as a long strip for example similar to a fish line.
  • Useable materials include nylon, polypropylenes and/or polyethylene lines, typically 0.025 - 0.080 inch in diameter (0.6 - 2 mm).
  • the strips 286 preferably extend completely through corrugations 287.
  • the ultrasonic (sonic) welding horn 291 is shown having welded and compressed corrugations (flutes) 287 closed, at region 295.
  • the strips 286, will have been deformed and welded, to seal the corrugations (flutes) 287 closed.
  • section 303 could comprise a strip of single facer material with sealed tail end 305
  • section 304 could comprise a strip of single facer material with lead end 306.
  • Each of the strips would be sealed at its opposite ends, by a similar process.
  • Each of the strips could then be coiled to form the media pack coil 241, Fig. 9.
  • Fig. 7 In Fig. 7 at 290, in phantom lines, is shown an optional end bead.
  • the optional end bead 290 could be applied after the molding process for housing seal arrangement 202, to a location on side wall 207, adjacent end face 206 of the media pack 201.
  • Such a bead 290 could be used to provide an engagement with an air cleaner housing, to inhibit rubbing between the media pack 201 and the air cleaner housing at this location.
  • the bead 290 could be applied from a hot melt material, or for example, a molded material such as polyurethane. It could be molded in position, by using a mold if desired; or it could be applied as a bead. If desired it can be applied at a location which will extend over a portion of label or sheet 251, Fig. 6, to further secure the label or sheet 251 in position.
  • the optional bead 290 could be located at end 207a or spaced therefrom.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Packages (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un système de cartouche filtrante destiné à être utilisé dans un épurateur d'air. La cartouche filtrante comprend un système de couches enroulées, présentant un système d'étanchéité moulé directement sur le système de couches enroulées. L'invention concerne également des procédés de moulage du système d'étanchéité en place. L'invention concerne en outre des procédés de formation d'un bouchon d'étanchéité central, ainsi que des procédés de fixation d'une poignée sur le système. L'invention concerne enfin un procédé pour étanchéifier les extrémités avant et arrière d'une bande de matériau de surface unique, à partir de laquelle un ensemble de couches de la cartouche filtrante peut être formée.
PCT/US2005/026465 2004-07-26 2005-07-25 Système constitué d'un ensemble de couches filtrantes en z et procédés WO2006014941A2 (fr)

Applications Claiming Priority (2)

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US59128004P 2004-07-26 2004-07-26
US60/591,280 2004-07-26

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EP2027904A2 (fr) 2007-07-24 2009-02-25 Mann+Hummel Gmbh Elément filtrant doté d'un joint et procédé de fabrication de l'élément filtrant
WO2009108598A1 (fr) * 2008-02-25 2009-09-03 Donaldson Company, Inc. Elément de filtre pour nettoyage par impulsion et procédés
WO2009124284A3 (fr) * 2008-04-04 2010-02-25 Donaldson Company, Inc. Elément filtrant, collecteur de poussière et procédés
US7753982B2 (en) 2006-02-17 2010-07-13 Baldwin Filters, Inc. Filter with drained jacket, seal indicator/lock means, and seal baffle
US20100242425A1 (en) * 2009-03-30 2010-09-30 Baldwin Filters, Inc. Fluted Filter With Axial Seal
US7909954B2 (en) 2004-11-03 2011-03-22 Baldwin Filters, Inc. Method and apparatus for winding a filter media pack
US7931725B2 (en) 2004-11-02 2011-04-26 Baldwin Filters, Inc. Fluted filter apparatus
US7959703B2 (en) 2008-06-30 2011-06-14 Baldwin Filters, Inc. Fluted filter with integrated frame
US8048187B2 (en) 2008-06-30 2011-11-01 Baldwin Filters, Inc. Filter frame attachment and fluted filter having same
US8206625B2 (en) 2004-11-02 2012-06-26 Baldwin Filters, Inc. Filter element
US8221567B2 (en) 2009-06-08 2012-07-17 Wix Filtration Corp Llc Filter media and system and method of manufacturing the same
JP2013240790A (ja) * 2006-05-10 2013-12-05 Donaldson Co Inc エアフィルタカートリッジおよびエアクリーナ
US8673043B2 (en) 2010-03-17 2014-03-18 Baldwin Filters, Inc. Fluid filter
US9545593B2 (en) 2007-11-01 2017-01-17 Baldwin Filters, Inc. Winding core pressure relief for fluted filter
JP2017077559A (ja) * 2007-02-02 2017-04-27 ドナルドソン カンパニー，インコーポレイティド 濾材積層体
USD786935S1 (en) 2015-11-20 2017-05-16 Baldwin Filters, Inc. Filter element
US9757676B2 (en) 2006-12-06 2017-09-12 Baldwin Filters, Inc. Method and apparatus for winding a filter element
US9795911B2 (en) 2004-08-06 2017-10-24 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US9855519B2 (en) 2008-07-25 2018-01-02 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9890750B2 (en) 2004-11-02 2018-02-13 Baldwin Filters, Inc. Filter element
US10040020B2 (en) 2006-12-06 2018-08-07 Baldwin Filters, Inc. Fluid filter apparatus having filter media wound about a winding frame
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
US10525397B2 (en) 2007-06-26 2020-01-07 Donaldson Company, Inc. Filtration media pack, filter element, and methods
EP3370849B1 (fr) 2015-11-04 2020-02-19 Parker-Hannifin Corporation Joint a vague pour elemente filtrante
US10682597B2 (en) 2016-04-14 2020-06-16 Baldwin Filters, Inc. Filter system
US11358090B2 (en) 2010-03-17 2022-06-14 Baldwin Filters, Inc. Fluid filter
US11426691B2 (en) 2016-11-04 2022-08-30 Donaldson Company, Inc. Filter elements, air cleaner assemblies, and methods of use and assembly
US11517840B2 (en) 2017-11-27 2022-12-06 Donaldson Company, Inc. Air cleaner assemblies and methods of use
US11772031B2 (en) 2015-12-18 2023-10-03 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features components; and, methods

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US10556201B2 (en) 2004-08-06 2020-02-11 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US11759744B2 (en) 2004-08-06 2023-09-19 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
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US8206625B2 (en) 2004-11-02 2012-06-26 Baldwin Filters, Inc. Filter element
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US7931725B2 (en) 2004-11-02 2011-04-26 Baldwin Filters, Inc. Fluted filter apparatus
US9890750B2 (en) 2004-11-02 2018-02-13 Baldwin Filters, Inc. Filter element
US8551375B2 (en) 2004-11-02 2013-10-08 Baldwin Filters, Inc. Filter element
US9932943B2 (en) 2004-11-02 2018-04-03 Baldwin Filters, Inc. Filter element
US7909954B2 (en) 2004-11-03 2011-03-22 Baldwin Filters, Inc. Method and apparatus for winding a filter media pack
US7753982B2 (en) 2006-02-17 2010-07-13 Baldwin Filters, Inc. Filter with drained jacket, seal indicator/lock means, and seal baffle
JP2013240790A (ja) * 2006-05-10 2013-12-05 Donaldson Co Inc エアフィルタカートリッジおよびエアクリーナ
US10065146B2 (en) 2006-12-06 2018-09-04 Baldwin Filters, Inc. Method and apparatus for winding a filter element
US10040020B2 (en) 2006-12-06 2018-08-07 Baldwin Filters, Inc. Fluid filter apparatus having filter media wound about a winding frame
US9757676B2 (en) 2006-12-06 2017-09-12 Baldwin Filters, Inc. Method and apparatus for winding a filter element
US10213724B2 (en) 2006-12-06 2019-02-26 Baldwin Filters, Inc. Fluid filter apparatus having filter media wound about a winding frame
US10786774B2 (en) 2007-02-02 2020-09-29 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US11612845B2 (en) 2007-02-02 2023-03-28 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
JP2017077559A (ja) * 2007-02-02 2017-04-27 ドナルドソン カンパニー，インコーポレイティド 濾材積層体
US10525397B2 (en) 2007-06-26 2020-01-07 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
US11298645B2 (en) 2007-06-26 2022-04-12 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US8216496B2 (en) 2007-07-24 2012-07-10 Mann + Hummel Gmbh Filter element with sealing and method of producing the filter element
EP2027904A3 (fr) * 2007-07-24 2009-05-13 Mann+Hummel Gmbh Elément filtrant doté d'un joint et procédé de fabrication de l'élément filtrant
EP2027904A2 (fr) 2007-07-24 2009-02-25 Mann+Hummel Gmbh Elément filtrant doté d'un joint et procédé de fabrication de l'élément filtrant
US9545593B2 (en) 2007-11-01 2017-01-17 Baldwin Filters, Inc. Winding core pressure relief for fluted filter
US9764269B2 (en) 2008-02-25 2017-09-19 Donaldson Company, Inc. Filter element for pulse cleaning and methods
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EP3804836A1 (fr) * 2008-02-25 2021-04-14 Donaldson Company, Inc. Élément de filtre pour nettoyage par impulsion et procédés
US20220241716A1 (en) * 2008-02-25 2022-08-04 Donaldson Company, Inc. Filter element for pulse cleaning and methods
WO2009108598A1 (fr) * 2008-02-25 2009-09-03 Donaldson Company, Inc. Elément de filtre pour nettoyage par impulsion et procédés
US8545585B2 (en) 2008-02-25 2013-10-01 Donaldson Company, Inc. Filter element for pulse cleaning and methods
US12053734B2 (en) 2008-04-04 2024-08-06 Donaldson Company, Inc. Filter element, dust collector, and methods
US9283503B2 (en) 2008-04-04 2016-03-15 Donaldson Company, Inc. Filter element, dust collector, and methods
US9827526B2 (en) 2008-04-04 2017-11-28 Donaldson Company, Inc. Filter element, dust collector, and methods
US10946322B2 (en) 2008-04-04 2021-03-16 Donaldson Company, Inc. Filter element, dust collector, and methods
WO2009124284A3 (fr) * 2008-04-04 2010-02-25 Donaldson Company, Inc. Elément filtrant, collecteur de poussière et procédés
US10137396B2 (en) 2008-04-04 2018-11-27 Donaldson Company, Inc. Filter element, dust collector, and methods
US8177877B2 (en) 2008-06-30 2012-05-15 Baldwin Filters, Inc. Filter frame attachment and fluted filter having same
US8048187B2 (en) 2008-06-30 2011-11-01 Baldwin Filters, Inc. Filter frame attachment and fluted filter having same
US7959703B2 (en) 2008-06-30 2011-06-14 Baldwin Filters, Inc. Fluted filter with integrated frame
US12048888B2 (en) 2008-07-25 2024-07-30 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
US9855519B2 (en) 2008-07-25 2018-01-02 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US8506668B2 (en) 2009-03-30 2013-08-13 Baldwin Filters, Inc. Fluted filter with axial seal
US8551207B2 (en) 2009-03-30 2013-10-08 Baldwin Filters, Inc. Fluted filter with axial seal
US20100242425A1 (en) * 2009-03-30 2010-09-30 Baldwin Filters, Inc. Fluted Filter With Axial Seal
US8685301B2 (en) 2009-03-30 2014-04-01 Baldwin Filters, Inc. Fluted filter with axial seal
US8221567B2 (en) 2009-06-08 2012-07-17 Wix Filtration Corp Llc Filter media and system and method of manufacturing the same
US10363513B2 (en) 2009-08-03 2019-07-30 Donaldson Company, Inc. Method and apparatus for forming fluted filtration media having tapered flutes
US10058812B2 (en) 2010-01-25 2018-08-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US11413563B2 (en) 2010-01-25 2022-08-16 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US8673043B2 (en) 2010-03-17 2014-03-18 Baldwin Filters, Inc. Fluid filter
US11358090B2 (en) 2010-03-17 2022-06-14 Baldwin Filters, Inc. Fluid filter
EP3370849B1 (fr) 2015-11-04 2020-02-19 Parker-Hannifin Corporation Joint a vague pour elemente filtrante
EP3666359B1 (fr) 2015-11-04 2023-09-20 Parker-Hannifin Corporation Assemblage de filtre avec un élément filtrant ayant un joint ondulé
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US10682597B2 (en) 2016-04-14 2020-06-16 Baldwin Filters, Inc. Filter system
US11426691B2 (en) 2016-11-04 2022-08-30 Donaldson Company, Inc. Filter elements, air cleaner assemblies, and methods of use and assembly
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