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    • 专利摘要:
    FILTER CARTRIDGE WITH SEALING ELEMENT, AND METHODS An air filter cartridge has filter media and a gasket arrangement, with a perimeter gasket element against the downstream flow face and a side gasket element adjacent to at least a partial extent of a first side panel. The side gasket element does not include any part against the second, third and fourth panels of the air filter cartridge. The air filter cartridge can be used in a dust collector, having a tubular sheet and a frame arrangement extending from the tubular sheet. The perimeter gasket element seals against the frame arrangement, and the side gasket element seals against the tubular sheet.
    公开号:BR112012008989B1
    申请号:R112012008989-7
    申请日:2010-10-06
    公开日:2021-08-31
    发明作者:Thomas Donald Raether
    申请人:Donaldson Company, Inc；
    IPC主号:
    专利说明:

    [001] This patent application was filed on October 6, 2010, as an international PCT patent application in the name of Donaldson Company, Inc., a US corporation, applicant for nomination in all countries except States United States of America, and Thomas D. Raether, a US citizen, applicant for US nomination only, claims priority for provisional patent applications: US 61/251,493, filed October 14, 2009; 61/334,665, filed May 14, 2010; and 61/360,659, filed July 1, 2010. Descriptions of all such patent applications are incorporated into this specification by reference in their entirety. TECHNICAL FIELD
    [002] This invention refers to filters for cleaning air, for example, for use in dust collectors and other equipment. In particular, this invention relates to Z-filters, having a wrap-around seal, and dust collectors using Z-filters, and methods. BACKGROUND
    [003] Dust collectors are used to remove particulate matter from air flow streams. One embodiment of dust collectors includes filter bag chamber filters. Filter bag chamber filters include a housing, a dirty air inlet, a clean air outlet, and a tubular sheet having multiple openings. The tubular sheet separates the housing between a dirty air side and a clean air side, and retains the filter bag chambers. The bags are made of a filter media, so as the dirty air flows from the dirty air side to the clean air side, the air must flow through the bags, and the bag's filter media prevents the particulate matter. hit the clean air side.
    [004] Another embodiment of dust collectors, which is known, includes the use of filter cartridges having pleated media in the form of cylinders or oval elements. The filter cartridges are held by a tubular sheet, and the air must flow through the pleated means of the filter cartridges, from the dirty air side to the clean air side. Improvements to dust collectors are desirable. SUMMARY
    [005] In one aspect, a filter cartridge is provided, including a packaging of media, having opposite upstream and downstream flow faces, opposite first and second sides extending between the upstream and opposite flow faces. downstream. A first side panel is against the first side of the media package. The gasket arrangement has a gasket member perimeter against the downstream flow face and around a perimeter of the downstream flow face. The gasket arrangement also includes a side gasket element, integral with the perimeter gasket element, and adjacent to at least a partial extension of the first side panel.
    [006] In another aspect, an air filtration method includes directing the dirty air to an unfiltered air container of a housing, the housing having a tubular sheet and a frame arrangement. Next, there is the step of directing the dirty air through one side upstream of a medium packing of a first air filter cartridge, to remove contaminant from the dirty air and result in filtered air in the filtered air container. The media package has opposite upstream and downstream flow faces. Next, there is the step of preventing dirty air from bypassing the first air filter cartridge by means of a gasket arrangement including a perimeter gasket element against the downstream flow face and around a perimeter of the flow face downstream, the perimeter gasket element being compressed against the frame arrangement. A side gasket member, integral with the perimeter gasket member, and adjacent to at least a partial extension of the first side panel, is pressed against the sealing surface of the tubular sheet.
    [007] In another aspect, a gasket, for use with a filter cartridge, includes a first gasket segment, having: a free end and an opposite first end; a second gasket segment having a free end and a second opposite end; the second gasket segment being angled relative to the first gasket segment at an angle of 20 - 70°; a ratio of a length of the first gasket segment to the second gasket segment being between 1 - 2.5; and an intermediate gasket segment joining the first end of the first gasket segment and the second end of the second gasket segment. The first gasket segment, the second gasket segment and the intermediate gasket segment together define an open filter cartridge receiving cavity constructed and arranged to receive a filter cartridge.
    [008] It should be noted that not all of these specific features, described in this descriptive report, need to be incorporated into a provision, for it to have some selected advantage in accordance with the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
    [009] Figure 1 is a perspective, schematic, partial view of a single-sided strip of Z-shaped filter media, comprising a grooved sheet attached to a face sheet.
    [010] Figure 2 is a partial, schematic, enlarged view of a single-faced sheet, comprising grooved means fixed in the faceted half.
    [011] Figure 3 is a schematic view of several selected groove shapes.
    [012] Figure 3A is a schematic, partial, cross-sectional view of another grooved half configuration in a single-sided media package.
    [013] Figure 3B is a cross-sectional, partial, schematic view of yet another alternative groove definition.
    [014] Figure 3C is a cross-sectional view, partial, schematic of yet another definition of groove for a packaging of media.
    [015] Figure 4 is a schematic view of a process for producing single-sided media, for use in a media packaging according to the present invention.
    [016] Figure 5 is a schematic cross-sectional view of an example of a dart-shaped groove.
    [017] Figure 6 is a perspective, schematic view of a half-coiled construction, comprising a spiraled sheet of a single-sided media material.
    [018] Figure 7 is a perspective, schematic view of a half-stacked construction.
    [019] Figure 8 is a perspective view of a first embodiment of an air filter cartridge, using a media packaging having a stack of strips of single-sided filter media, constructed in accordance with the principles of this invention.
    [020] Figure 9 is a detailed perspective view of the air filter cartridge of Figure 8.
    [021] Figure 10 is a top view of the air filter cartridge of Figure 8.
    [022] Figure 11 is a cross-sectional view of the air filter cartridge of Figure 8, the cross section being taken along line 11 - 11 of Figure 10.
    [023] Figure 12A is an enlarged view of a portion of the cross-section of Figure 11.
    [024] Figure 12B is an enlarged view of a profile of the gasket used with the filter cartridge of Figures 8 - 11.
    [025] Figure 12C is a perspective view of the gasket of Figure 12B.
    [026] Figure 13 is a perspective view of another embodiment of an air filter cartridge, having a media package comprising a stack of strips of single-sided filter media material, constructed in accordance with the principles of this invention.
    [027] Figure 14 is an enlarged cross-sectional view of a portion of the air filter cartridge of Figure 12.
    [028] Figure 15 is a front view of an embodiment of a dust collector, using air filter cartridges of the type shown in Figures 8 - 14, built in accordance with the principles of this invention.
    [029] Figure 16 is a cross-sectional view of the dust collector of Figure 15, the cross section being taken along line 16 - 16 of Figure 15. DETAILED DESCRIPTION I. GENERIC Z FILTER MEDIA SETTINGS
    [030] Grooved filter media can be used to provide fluid filter constructions in a number of ways. A well-known way is as a Z-filter construction. The term "Z-filter construction", as used in this specification, is mentioned to refer to a filter construction, in which those of individual filter grooves corrugated, pleated and otherwise formed are used to define sets of longitudinal filter grooves for fluid flow through the medium; the fluid flowing along the length of the grooves, between the inlet and outlet middle flow ends (or flow faces).
    [031] A type of Z-shaped filter medium utilizes two specific medium components joined together to form the medium construct. The two components are: (1) a half-grooved sheet (typically, corrugated); and (2) a half-faced sheet. The faceted half sheet is typically uncorrugated, although it may be corrugated, for example, perpendicular to the groove direction, as described in provisional patent application US 60/543,804, filed February 11, 2004, incorporated by reference in the this descriptive report.
    [032] The grooved half sheet (typically corrugated) and the faceted half sheet are used together to define the middle having parallel inlet and outlet grooves, i.e., opposite sides of the grooved sheet operable as inlet flow regions and exit. In some cases, the grooved sheet and the ungrooved sheet are secured together, and are then spiraled to form a Z-shaped filter media construction. Such arrangements are described, for example, in US patent applications 6,235,195 and 6,179. 890, all of which are incorporated herein by reference. In some other arrangements, some uncoiled sections of grooved media, affixed to flat media, are stacked together to create a filter construction. An example of this is shown in this descriptive report in Figure 7.
    [033] Typically, the spiraling of the grooved sheet/faced sheet combination around itself to create a medium wrap is conducted with the faceted sheet directed outwards. Some techniques for spiraling are described in provisional patent application US 60/467,521, filed May 2, 2003, and PCT patent application US 04/07927, filed March 17, 2004, published September 30, 2004 , such as WO 2004/082795. The resulting spiral arrangement generally therefore has, as the outer surface of the media package, a faceted sheet part. In some cases, a protective covering may be provided around the media package.
    [034] The term "corrugated", when used in this specification, refers to the structure in the middle, it is mentioned to refer to a grooved structure, resulting from the passage of the middle between two corrugation rollers, that is, in a wedging or pinching between two rollers, each of which has surface characteristics suitable for causing a corrugating effect in the resulting medium. The term "corrugation" is not mentioned to refer to grooves, which are formed by techniques that do not involve the passage of media in a pinch between the corrugation rollers. However, the term "corrugated" is mentioned to apply even if the medium has been further modified or deformed after corrugation, for example, by folding techniques. The corrugated medium is a specific form of the grooved medium. The grooved middle is one that has individual grooves (formed, for example, by corrugating or folding) extending through it.
    [035] Usable configurations of filter elements or filter cartridges, utilizing Z-shaped filter media, are sometimes referred to as "direct through-flow configurations" or by their variants. In general, what is significant in this context is that usable filter elements generally have an inflow end (or face) and an opposite outflow end (or face), with the flow entering and leaving the cartridge of filter generally in the same direct through direction. (The term "direct through-flow configuration" neglects, by this definition, any flow of air that passes outside the media wrapping through the outermost shell of faceted media.) The term "usable" means, in this context, a cartridge-containing media filter, which is periodically removed and replaced with a corresponding air filter.
    [036] A direct through-flow configuration (especially for a spiral-medium packaging) is, for example, compared to serviceable filter cartridges, such as cylindrical pleated filter cartridges of the type shown in US patent application 6,039. 778, incorporated by reference in this descriptive report, whereby the flow generally makes a turn as it passes through the usable cartridge. That is, in the filter of reference 6,039,778, the flow enters the cylindrical filter cartridge through a cylindrical side, and then rotates to exit through an end face (in the forward flow system).
    [037] The term "Z construction of filter media" and its variants, as used in this specification, without further ado, are mentioned to refer to any or all of: a fabric of a corrugated or grooved medium of another mode fixed (facing) the medium, with a suitable seal to inhibit the flow of air from one flow face to another, without filter passage through the filter medium; and/or, that medium spiraled or otherwise constructed, or formed into a three-dimensional network of grooves; and/or a filter construct including that medium. In many arrangements, the Z-shaped filter media construction is configured to form a network of inlet and outlet grooves, the inlet grooves being opened in a region adjacent to an inlet face, and closed in an adjacent region. to an output face; and, the exit grooves being closed adjacent an entrance face, and being open adjacent an exit face. However, alternative arrangements of Z-shaped filter means are possible, see, for example, patent application US 2006/0091084 A1, published May 4, 2006, also comprising grooves extending between opposite flow faces, with a seal arrangement to prevent the flow of unfiltered air from the media conditioning.
    [038] In Figure 1 of this descriptive report, an example of medium 1, useful in Z-filter medium, is shown. The middle 1 is formed of a grooved (corrugated) sheet 3 and a faceted sheet 4. In that case, a middle strip, comprising a grooved sheet affixed to the faceted sheet, will sometimes be referred to as a face strip. single, or by similar terms. In general, the corrugated sheet 3, Figure 1, is of a generic type, generally characterized as having a wavy, curved, regular pattern of ridges or corrugations 7. The term "corrugated pattern" in this context is mentioned to refer to to a grooved or corrugated pattern with alternating gutters 7b and ridges 7a. The term "regular" in this context is mentioned to refer to the fact that the pairs of gutters and ridges (7b, 7a) generally alternate with the same size and shape as the corrugation (or groove). (Also, typically, in a regular configuration, the gutters 7b are substantially the inverse of the ridges 7a). The term "regular" is thus mentioned to indicate that the corrugation (or groove) pattern comprises gutters and ridges, which are repeated pairwise (comprising a pair of adjacent gutter and ridge), without substantial modification in size and shape of the corrugation along at least 70% of the length of the grooves. The term "substantial" in this context refers to a modification resulting from a variation in the process or shape used to create the corrugated or grooved sheet, in contrast to slight variations in the fact that the middle sheet 3 is flexible. With respect to the characterization of a repetitive model, it is not wanted to mention that, in any given filter construction, an equal number of crests and gutters is necessarily present. The means 1 can be terminated, for example, between a pair comprising a crest and a trough, or partially along a pair comprising a crest and a trough. (For example, in Figure 1, middle 1, partially illustrated, has eight complete ridges 7a and seven complete chutes 7b). Also, the ends of opposite grooves (ends of gutters and ridges) can vary from each other. These variations in extremities are disregarded in these definitions unless otherwise indicated. That is, variations in the ends of the grooves are intended to be covered by the definitions above.
    [039] In the context of characterizing a "curved" corrugated model of corrugations, the term "curved" is mentioned to refer to a corrugation model, which is not the result of a bent or pleated shape provided to the medium. , but instead the apex 7a of each crest and the bottom 7b of each trough is formed along a ray curve. Although alternatives are possible, a typical radius for this Z-shaped filter medium would be at least 0.25 mm, and would typically be no more than 3 mm.
    [040] An additional feature of the particular regular wavy, curved, pattern illustrated in Figure 1 for the corrugated sheet 3 is one in which approximately an intermediate point 30, between adjacent gutters and ridges, along most of the length of the grooves 7, is located in a transient region, in which the curvature reverses. For example, seen from the side or back face 3a in Figure 1, a trough 7b is a concave region and the ridge 7a is a convex region. Naturally, when viewed towards the side or front face 3b, the runner 7b of the side 3a forms a ridge, and the ridge 7a of the face 3a forms a runner. (In some cases, region 30 may be a straight segment rather than a point, with the curvature reversing at the ends of segment 30.)
    [041] A feature of the particular regular waved, curved, pattern corrugated sheet 3, shown in Figure 1, is that the individual corrugations are generally straight. By "straight" in this context it is meant that for at least 70% (typically at least 80%) of the length between ridges 8 and 9, ridges 7a and gutters 7b do not vary substantially in cross section . The term "straight", in reference to the corrugation pattern shown in Figure 1, is distinguished in part from the grooved or tapered corrugated media pattern described in Figure 1 of the international patent application WO 97/40918 and in the publication of the international patent application WO 03/47722, published June 12, 2003. The tapered grooves in Figure 1 of international patent application WO 97/40918, for example, will be a curved wavy pattern, but not a " regular", or a straight groove pattern, according to the terms that are used in this specification.
    [042] With reference to the present Figure 1 and as noted above, means 1 has opposite first and second edges 8 and 9. When means 1 is spiraled and formed into a medium wrap, in general, the edges will form an end inlet for media packaging, and edge 8 is an outlet end, although an opposite orientation is possible. In the example shown, adjacent to edge 8 a sealant is provided, in this case in the form of a sealant cord 10, sealing together the corrugated (grooved) sheet and the face sheet 4. The cord 10 will sometimes be referred to as a "single sided" strand, as it is a strand between corrugated sheet 3 and a motor faced sheet that forms a half or single sided strip 1. Sealing strand 10 seals the individual closed grooves 11 adjacent to edge 8 to the passage of air through them.
    [043] In the example shown, a sealant is provided adjacent to edge 9, in this case in the form of a sealant bead 14. Sealant cord 14 closes grooves 15 to the passage of unfiltered fluid therethrough adjacent to edge 9. The cord 14 will typically be applied, as the medium 1 is spiraled on itself, with the corrugated sheet 3 directed inwards. In this way, the strand 14 will form a seal between a back side 17 of the faced sheet 4 and the side 18 of the corrugated sheet 3. The strand 14 will sometimes be referred to as a "winding cord", as it is typically applied as strip 1 is spiraled in a half-coiled wrap. If medium 1 is cut into strips and stacked rather than spiraled, then strand 14 will be a "stacked strand".
    [044] Referring to Figure 1, since the medium 1 is incorporated into a medium-conditioning, for example, by spiraling or stacking, it can be operated as described below. First, air in the direction of arrows 12 will enter open grooves 11 adjacent to end 9. Due to the closure at end 8 by cord 10, air will pass through the medium shown by arrows 13. It can also exit the medium packaging, by passage through the open ends 15a of the grooves 15, adjacent to the end 8 of the media container. Of course, the operation can be conducted with an air flow in the opposite direction.
    [045] In more general terms, the Z-shaped filter media comprises grooved filter media attached to the faceted filter media, and configured in a media packaging of grooves extending between the first and second opposite flow faces. A sealing arrangement is provided within the media package to ensure that air entering the grooves at a first upstream edge cannot exit the media package from a downstream edge without filtering through the media.
    [046] For the particular arrangement shown in the present specification in Figure 1, the parallel corrugations 7a, 7b are generally completely straight through the middle, from edge 8 to edge 9. Straight grooves or corrugations can be deformed or bent at selected locations , especially on the edges. Modifications to the grooved ends for closure are generally disregarded in the above definitions of "regular", "curved" and "wavy pattern".
    [047] Z-filter constructions, which do not use wavy, regular curved, straight pattern corrugations (grooves) shapes are known. For example, in Yamada et al., US patent 5,562,825, corrugation models, which utilize relatively semicircular (cross-sectional) entry grooves adjacent to narrow V-shaped (curved sides) exit grooves, are shown (See Figures 1 and 3 of reference 5.562.825). In Matsumoto et al., US Patent 5,049,326, circular (in cross-section) or tubular grooves, defined by a sheet having half-tubes attached to another sheet having half-tubes, with flat regions between the resulting straight, parallel grooves are shown, see Figure 2 of Matsumoto '326. In Ishii et al., U.S. Patent 4,925,561 (Figure 1), the grooves bent to have a rectangular cross section are shown, where the grooves taper along their lengths. In the international patent application WO 97/40918 (Figure 1), parallel grooves or corrugations, which have a wavy, curved pattern (of adjacent curved convex and concave gutters), but which taper along their lengths (and from that mode, are not straight) are shown. Also, in the international patent application WO 97/40918, grooves having curved corrugated patterns, but with ridges and gutters of different sizes, are shown.
    [048] In general, the filter media is a relatively flexible material, typically a non-woven fibrous material (cellulosic fibers, synthetic fibers, or both) often including a resin in it, sometimes treated with other materials. In this way, they can be shaped or configured in the various corrugated models, without damage from unacceptable means. Also, it can be easily spiraled or otherwise configured for use, again without damage from unacceptable means. Naturally, it must be of a nature so that it will maintain the required corrugated configuration during use. In the process of corrugation, an inelastic deformation is caused in the middle. This prevents the medium from returning to its original form. However, once the tension is released, the ridges or corrugations will tend to bounce back, recovering only some of the stretching and bending that has occurred. The faced sheet is sometimes bonded to the grooved sheet to inhibit this return to the corrugated sheet. The middle of the corrugated sheet 3 or the face sheet 4, or both, may be provided with a fine fiber material on one or both sides thereof, for example, in accordance with US patent 6,673,136, incorporated by reference in this descriptive report.
    [049] One aspect with regard to Z-filter constructions concerns the closure of the ends of the individual grooves. Typically, a sealant or adhesive is provided to effect the closure. As is evident from the above discussion, in Z-filter media, especially those using straight grooves as opposed to tapered grooves, large sealing surface areas (and volumes) at both the upstream end and the downstream end are required. High quality seals, in place, are critical for proper operation of the resulting media structure. The high sealing volume and area give rise to the aspects in this regard.
    [050] Still referring to Figure 1, 20 sticky strands are shown positioned between the corrugated sheet 3 and the faced sheet 4, securing the two together. The sticky strands can be, for example, discontinuous lines of adhesive. The sticky strands can also be points at which the sheets of media are joined together.
    [051] From what has been mentioned above, it is evident that the corrugated sheet 3 is typically not continuously attached to the face sheet, along the gutters or ridges in which the two are joined. Thereby, air can flow between adjacent inlet grooves, and alternatively between adjacent outlet grooves, without passing through the middle. However, the air, which has entered the inlet groove cannot leave an outlet groove, without passing through at least one sheet of medium, with filtration.
    [052] Attention is now directed to Figure 2, in which a 40 Z-shaped filter media construction using a grooved sheet (in this case, corrugated, curved, regular pattern), and a flat, uncorrugated face sheet 44, is illustrated. The distance D1 between points 50 and 51 defines the extent of the flat half 44 in the region 52, below a certain corrugated groove 53. The length D2 from the arc-shaped middle to the corrugated groove 53, by the same distance D1, is, of course, larger than D1 due to the shape of the corrugated groove 53. For a typical regular shaped medium used in grooved filter applications, the linear length D2 of the medium 53 between points 50 and 51 will generally be , at least 1.2 time D1. Typically, D2 will be within a range of 1.2 - 2.0, inclusive. A particularly convenient arrangement for air filters has a configuration where D2 is about 1.25 - 1.35 x D1. This medium has, for example, been used commercially in Donaldson Powercore® Z-filter arrangements. In this case, the D2/D1 ratio will sometimes be characterized as the groove/flat or drag medium to corrugated medium ratio.
    [053] In the corrugated cardboard industry, several standard grooves have been defined. For example, standard groove E, standard groove X, pattern groove B, pattern groove C, and pattern groove A. The attached Figure 3, in combination with Table A, shown below, provides definitions of these grooves.
    [054] Donaldson Company, Inc., (DCI), the assignee of the present invention, has used variations of pattern A and pattern B grooves in various Z-filter arrangements. These grooves are also defined in Table A and Figure 3. TABLE A


    [055] It should be noted that alternative groove definitions, such as those characterized in USSN 12/215,718, filed June 26, 2008 and 12/012,785, filed February 4, 2008 may use the items of air purifier, featured below.
    [056] In Figures 3A - 3C, cross-sectional views of exemplary portions of filter media are shown, where the grooved sheet has one or more peakless ridges extending along at least a portion of the length of the groove. . Figure 3A shows a grooved sheet having a different crest of peak 81 provided adjacent to peaks 82, 83, and Figures 3B and 3C show grooved sheets having different crests of peaks 84, 85, between adjacent peaks 86, 87. different peaks of peaks 81, 84, 85 can extend along the length of the groove by any proportion, including, for example, a ratio of 20% of the length of the groove to 100% of the length of the groove. Furthermore, the grooved sheet can be provided with no ridges other than peaks 81, 84, 85, between all adjacent peaks 82, 83, 86, 87, and can be provided with different numbers of ridges other than peaks 81, 84, 85 , between adjacent peaks 82, 83, 86, 87 (e.g. none, one or two different crests of alternating peaks in any arrangement). The presence of different crests of peaks 81, 84, 85 can help provide more available media for filtration in a given volume, and can help to reduce tension in the grooved sheet, thereby allowing for a smaller radius at the peaks and therefore , less masking of means. Such means can be used in arrangements in accordance with the present invention. II. MANUFACTURING SPIRAL MEDIA CONFIGURATIONS USING GENERICLY GROOVED MEDIA
    [057] In Figure 4, an example of a manufacturing process for producing a medium strip (single-sided), corresponding to strip 1, in Figure 1, is shown. In general, the face sheet 64 and the grooved (corrugated) sheet 66, having grooves 68, are placed together to form a fabric of media 69, with an adhesive strand located therebetween at 70. The adhesive strand 70 will form a single-sided bead 14, Figure 1. The term "single-sided bead" refers to a sealing bead positioned between the single-sided layers, that is, between the grooved sheet and the faced sheet.
    [058] An optional barb formation process takes place at station 71 to form the central directed section 72 located in the intermediate fabric. The Z-shaped filter media or strip of Z-medium 74 may be cut or slit at 75, along the strand 70, to create two pieces 76, 77 of the Z-shaped filter media 74, both having an edge with a strip of sealant (single-sided cord), extending between the corrugated and faceted sheets. Naturally, if the additional barb forming process is used, the edge with a strip of sealant (single sided cord) will also have a set of grooves directed towards that location. The strips or pieces 76, 77 can then be cut into single-sided strips for stacking, as described below in conjunction with Figure 7. Techniques for conducting a process, characterized in relation to Figure 4, are described in the application to international patent WO 04/007054, published January 22, 2004.
    [059] Still referring to Figure 4, before the Z-shaped filter medium 74 is placed in the barb forming section 71, and eventually cut into 75, it must be formed. In the schematic representation shown in Figure 4, this is done by passing a sheet of media 92 through a pair of corrugating rollers 94, 95. In the schematic representation shown in Figure 4, the sheet of media 92 is unwound from a roller 96, it is wound around traction rollers 98, and then passed through a wedging or nip 102, between the corrugation rollers 94, 95. The corrugation rollers 94, 95 have teeth 104, which will impart the overall desired shape of the corrugations after the flat sheet 92 passes through the wedging 102. After passing through the wench 102, the sheet 92 becomes corrugated in the machine direction, and is referred to at 66 as the corrugated sheet. Corrugated sheet 66 is then secured to face sheet 64.
    [060] Still referring to Figure 4, the process also shows the face sheet 64 being directed to the barb forming process station 71. The face sheet 64 is illustrated as being stored in a roll 106, and then directed to the corrugated sheet 66, to form Z-shaped filter media 74. Corrugated sheet 66 and face sheet 64 will typically be secured together by adhesive, or other means (e.g., by sonic welding).
    [061] Referring to Figure 4, an adhesive line 70 is shown used to secure the corrugated sheet 66 and the face sheet 64 together as the sealing cord. Alternatively, the sealing bead, for forming the faceted bead, can be applied as shown at 70a. If sealant is applied at 70a, it may be desirable to place a gap in the corrugation roller 95, and possibly both of the corrugation rollers 94, 95, to accommodate the bead 70a. Naturally, the equipment of Figure 4 can be modified to provide sticky strands 20, if desired.
    [062] The type of corrugation provided in the corrugated medium is a matter of selection, and will be dictated by the corrugation or corrugation teeth of the corrugation rollers 94, 95. A useful corrugation pattern will be a regular, curved corrugated pattern corrugation of straight grooves as defined above. A regular, curved corrugated pattern used will be one in which the D2 distance, as defined above on a corrugated pattern, is at least 1.2 times the D1 distance, as defined above. In exemplary applications, typically, D2 = 1.25 - 1.35 x D1, although alternatives are possible. In some cases, techniques can be applied with curved wavy patterns that are not "regular" including, for example, those that do not use straight grooves. Also, variations of the curved wavy patterns shown are possible. As described, the process shown in Figure 4 can be used to create the central barbed section 72. Figure 5 shows, in cross section, one of the grooves 68, after barb formation and cutting.
    [063] A fold arrangement 118 can be seen, to form a barbed groove 120 with four folds 121a, 121b, 121c and 121d. Fold arrangement 118 includes a first layer or flat portion 122, which is secured to face 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. , folding opposite outer ends 126, 127 of the first layer or portion 122.
    [064] Still referring to Figure 5, two of the folds or creases 121a, 121b will generally be referred to in this specification as "upper, inwardly directed" creases or creases. The term "top" in this context means to indicate that the pleats are on an upper portion of the entire fold 120, when the fold 120 is viewed in the orientation of Figure 5. The term "inwardly directed" is mentioned to refer to the fact that the fold line or fold line of each fold 121a, 121b is directed towards the other.
    [065] In Figure 5, pleats 121c, 121d will generally be referred to in this specification as "inferior, outward-directed" pleats. The term "bottom" refers, in this context, to the fact that pleats 121c, 121d are not located at the top, as are pleats 121a, 121b, in the orientation of Figure 5. The term "directed outward" is mentioned to indicate that the fold lines of the pleats 121c, 121d are directed away from each other.
    [066] The terms "top" and "bottom", as used in context, are specifically mentioned to refer to fold 120, when viewed from the orientation of Figure 5. That is, they are not mentioned to be otherwise. direction indicators, when the fold 120 is oriented into an effective product for use.
    [067] Based on these characterizations and review of Figure 5, it may be noted that a regular fold arrangement 118, according to Figure 5, is, in that description, one that includes at least two "inwardly directed, upper pleats ". These inwardly directed pleats are unique, and help to provide an overall arrangement in which the fold does not cause significant passage into adjacent grooves. A third layer or portion 128 can also be seen pressed against the second layer or portion 124. The third layer 128 is formed by folding opposite inner ends 130, 131 of the third layer 128.
    [068] Another way of viewing the ply arrangement 118 is in reference to the geometry of alternating ridges and gutters of the corrugated sheet 66. The first layer or portion 122 is formed of an inverted ridge. The second layer or part 124 corresponds to a double peak (after inverting the crest), which is bent towards it, and, in preferred arrangements, bent against the inverted crest.
    [069] Techniques for providing optional barb formation, described in conjunction with Figure 5, in a preferred manner, are described in international patent application WO 04/007054. The techniques for spiraling the medium, with application of the winding cord, are described in the international patent application PCT U.S. 04/07927, filed on March 17, 2004.
    [070] Alternative approaches to forming barbs at the closed ends are possible. These approaches may involve, for example, forming barbs in all the grooves, and rolling or bending in the various grooves. Generally, barb formation involves bending or otherwise manipulating the medium adjacent to the grooved end to promote a closed, compressed state. The techniques described in this specification are particularly well suited for use in media packaging, which result from a single-ply spiraling step comprising a corrugated sheet/faced sheet combination, i.e. a "single-sided" strip .
    [071] Spiral media packaging arrangements can be provided with various definitions of peripheral perimeters. In this context, the term "peripheral, perimeter definition", and its variants, is mentioned to refer to the defined external perimeter shape, aiming at either the inlet or the outlet end of the medium package. Typical shapes are circular, as described in international patent application WO 04/007054 and PCT U.S. patent application 04/07927. Other useful shapes are oblongs, some examples of oblongs being oval shapes. Oval shapes generally have opposite curved ends held by a pair of opposite sides. In some oval shapes, the opposite sides are also curved. In other oval shapes, sometimes called car racing oval shapes, the opposite sides are usually straight. Running oval shapes are described, for example, in international patent application WO 04/007054 and in PCT U.S. patent application 04/07927. Another way to describe the peripheral or perimeter shape is by definition of the perimeter resulting from considering a cross section by means of packaging, in an orthogonal direction for the coil winding access.
    [072] Flow ends or opposite flow faces of the media conditioning can be provided with several different definitions. In many arrangements, the ends are generally flat and perpendicular to each other. In other arrangements, the end faces include tapered, spiraled, stepped portions, which can be defined to protrude axially outward from an axial end of the media housing sidewall, or protrude axially into an end of the media housing. side wall of the medium packaging.
    [073] Grooved seals (eg, single sided bead, winding bead, or stacking bead) can be formed from a variety of materials. In several of the cited and incorporated references, cast adhesive or polyurethane seals are described as possible for various applications.
    [074] Reference numeral 30, Figure 6, generally indicates a half-coiled package 130. The half-coiled package 130 comprises a single strip 130a of single-faced material, comprising a grooved sheet attached to the spiral-faced sheet around a a center, which may include a nucleus, or which may be neglected, as illustrated. Typically, spiraling is with the face sheet facing outward. As described above, in general, a single sided bead and a winding bead will be used to provide grooved seals within the middle. The particular spiral half wrapping 130 illustrated comprises an oval half wrapping 131. It should be noted that the principles described in this specification, however, can be applied, starting with the media wrapping having a circular configuration.
    [075] In Figure 7, schematically, it is shown a step of forming a packaging of Z-shaped filter media stacked with strips of Z-shaped filter media, each strip being a grooved sheet fixed to a faceted sheet. With reference to Figure 7, a single-sided strip 200 is shown incorporated into a stack 201 of strips 202, analogous to strip 200. Strip 200 may be cut from any of strips 76, 77, Figure 4. At 205, Figure 7 , application of a stacking strand 206 is shown, between each layer corresponding to a strip 200, 202 on an opposite edge of the strand or single-faced seal. (Stacking can also be done with each layer being embedded at the bottom of the stack, as opposed to the top.)
    [076] Referring to Figure 7, each strip 200, 202 has front and rear edges 207, 208 and opposite side edges 209a, 209b. The entry and exit grooves of the corrugated sheet/faced sheet combination, comprising strips 200, 202, which generally extend between the front and back edges 207, 208, and parallel to the side edges 209a, 209b.
    [077] Still referring to Figure 7, in the medium wrapping 201 being formed, the opposite flow faces are indicated at 210, 211. The selection of which of the faces 210, 211 is the inlet end face and which is the output end face, during filtering, is a matter of choice. In some cases, the stacking strand 206 is positioned adjacent to the upstream or inlet face 211, in others, the opposite is true. Flow faces 210, 211 extend between opposite side faces 220, 221.
    [078] Stacked media packaging 201, shown being formed in Figure 7, is sometimes referred to in this specification as a "locked" stacked media packaging. The term "locked" in this context is an indication that the arrangement is formed in a rectangular block, in which all faces are 90° to all faces of adjacent walls. Alternative configurations are possible, as discussed below in conjunction with some of the remaining figures. For example, in some cases, the stack can be created with each strip 200 being slightly shifted out of alignment with an adjacent strip to create a parallelogram or slanted block shape, with the input face and output face parallel to each other. , but not perpendicular to the top and bottom surfaces. In some cases, the media package will be referred to as having a parallelogram shape in any cross section, meaning that any two opposing side faces extend generally parallel to each other. A stacked, locked arrangement corresponding to Figure 7 is described in prior art U.S. Patent 5,820,646. It should be noted that a stacked arrangement shown in the U.S.S.N. 10/731.504, is an inclined stacked arrangement.
    [079] Various filter media having upstream and downstream flow faces are considered, and can be used in various implementations. These include a form of pleated means with grooves, having defined peaks, to reduce masking, such as those described in U.S. patent publication 2010/0078379, incorporated herein by reference. III. EXAMPLES OF AIR FILTER CARTRIDGE AND DUST COLLECTOR A. Examples of air filter cartridges, Figures 8 - 14
    [080] One embodiment of a filter cartridge is illustrated in Figure 8, generally at 320. The air filter cartridge 320 includes a media package 322. The media package 322 can include many different types of filter media, including, for example, ruffles, ruffles with defined peaks to reduce masking, or Z-filter media. In the illustrated example, media packaging 322 is Z-filter media having an upstream flow face 324 (Figure 11 ) and a downstream flow face 326. In the embodiment shown, the upstream flow face 324 and the downstream flow face 326 are generally flat, flat and parallel to each other.
    [081] The medium housing 32 includes a first and second opposite sides 328, 329 (Figure 11) extending between the upstream and downstream flow faces 324, 326. The medium housing 322 also includes a third and fourth flow faces 330, 331 (Figure 9), extending between the upstream and downstream flow faces 324, 326. As can be seen in the embodiment of Figures 8 - 10 and as mentioned above, the upstream flow face 324 and downstream flow face 326 are, in this embodiment, parallel. In that embodiment, each strip 334 of the media package 322 is angled relative to a horizontal surface of the upstream flow face 324 to the downstream flow face 326 at an angle of 20 - 80 degrees, e.g. degrees, and more particularly 40 - 50 degrees.
    [082] Still referring to Figures 8 - 11, the air filter cartridge 320 illustrated includes a first side panel 336, against the first side 328 of the media housing 322. The first side panel 336 is typically a rigid material. , to help protect the 322 medium packaging. It can be a hard plastic or it can be metal. First side panel 336 is illustrated as extending from upstream flow face 324 to downstream flow face 326. First side panel 336 may abut against media housing 322 in various ways. For example, the first side panel 336 can be a molded piece, which is directly molded in the media package 322, or it can be a prefabricated piece, which is secured with adhesive or glue. Other fixation methods can be used.
    [083] In that embodiment, the air filter cartridge 320 further includes a second side panel 337, against the second side 329 of the media wrapper 322. In that embodiment, there is also a third side panel 338, against the third side 330 of the wrapper. of middle 322, and a fourth side panel 339, against the fourth side 331 of the media package 322. The second side panel 337, the third side panel 338, and the fourth side panel 339 help to protect the media package 322. prefabricated parts, which are made of a rigid material and may include a rigid plastic or metal, which are then held together by adhesive or glue; alternatively, they may be molded parts, which are directly molded in the medium housing 322. In the illustrated embodiment all second side panel 337, third side panel 338 and fourth side panel 339 extend from upstream flow face 324 to the downstream flow face 326.
    [084] In accordance with the principles of this invention, the air filter cartridge 320 further includes a gasket arrangement 340. The gasket arrangement 340 will create a seal, with a suitable sealing surface, whatever the system in which the air filter cartridge 320 is installed so that the air to be filtered does not prevent media conditioning 322.
    [085] In this embodiment, the gasket arrangement 340 includes a perimeter gasket element 341 and a side gasket element 342. The perimeter gasket element 341 is against the downstream flow face 326 and around the edge or perimeter of the downstream flow face 326. In the embodiment shown, the perimeter gasket element 341 forms a rectangular window 343, with the opening in the window exposing the downstream flow face 326.
    [086] In this embodiment, the side gasket element 342 is adjacent to at least a partial extension of the first side panel 336. By the term "partial extension", it is meant that the side gasket element 342 can only cover a part of the first side panel 336. By the term "adjacent to", it is meant that it is close to the partial extension of the first side panel 336, at least when the cartridge 320 is operatively installed for use in a dust collector. In the embodiment shown, side gasket element 342 extends a distance of no more than 40% of an overall length of first side panel 336. In the particular embodiment shown, side gasket element 342 is against first side panel 336. It is shown to extend the distance by at least 5% and typically 10 - 30% of the overall length of the first side panel 336.
    [087] In this embodiment, media packaging 22 includes a stack of strips 34 of single-sided filter media material, with each strip 34 including a grooved middle sheet 3 (Figure 1), secured to a faceted media sheet 4 (Figure 1) and oriented with grooves 7 (Figure 1) of each grooved sheet extending in one direction between the upstream and downstream flow faces 24, 26.
    [088] In the embodiment shown, the side gasket element 342 is integral with the perimeter gasket element 341. By "integral", it is meant that the side gasket element 342 and the perimeter gasket element 341 are adjacent to each other , without a gap between them, and may include two separate pieces, fastened and fitted together; it can also be mentioned that they are molded in a single unitary piece. This can be seen in Figure 12A, so that the perimeter packing element 341 wraps around it to form the side packing element 342, joined together at the intermediate section 344.
    [089] In preferred implementations, the side gasket element 342 does not include any portion adjacent to or against the second side panel 337, the third side panel 338, and the fourth side panel 399 (i.e., the second side panel 337, the third panel side 338 and fourth side panel 339 are "gasket free"). That is, in preferred implementations, side gasket element 342 is adjacent only to first side panel 336.
    [090] When the side gasket element 342 is against the first side panel 336, it will still be at the same angle as the side panel 336 is with respect to the downstream flow face 326. In that embodiment, that angle will typically be 20 - 80 degrees, for example 30 - 60 degrees, and more particularly 45 - 50 degrees.
    [091] Gasket arrangement 340 can be constructed of typical materials used for gaskets such as polyurethane foam, urethane, rubber, silicone and any other typical gasket material.
    [092] The gasket arrangement 340 can be secured to a remaining portion of the cartridge 320 by various techniques, including, for example, adhesive or by direct molding the gasket arrangement 340 into the remainder of the cartridge 320.
    [093] Referring then to Figures 12B and 12C, an enlarged view of a useful side gasket element 342 is illustrated. In the embodiment shown, side gasket element 342 includes a first gasket segment 301. First gasket segment 301 has a free end 302 and an opposite first end 303. The illustrated gasket 342 further includes a second gasket segment 304 , having a free end 305 and an opposite second end 306. Note that the second end 306 is the part of the second gasket segment 304 at which the straight segment stops and a curved section begins. This can be seen in Figure 12C.
    [094] In the exemplary embodiment shown, both the first gasket segment 301 and the second gasket segment 304 are straight. The second gasket segment 304 is angled relative to the first gasket segment 301 at an angle between 20 - 70 degrees.
    [095] The intermediate gasket segment 344 joins the first end 303 of the first gasket segment 301 and the second end 306 of the second gasket segment 304. As noted in Figure 12B, the first gasket segment 301, the second gasket segment 304 and intermediate gasket segment 344 together define an open filter cartridge receiving cavity 307 constructed and arranged to receive a remaining portion of filter cartridge 320.
    [096] The first gasket segment 301 and the second gasket segment 304 are sized to create a suitable seal when operationally installed. In the exemplary embodiments, a ratio of a length of the first gasket segment 301 to the second gasket segment 304 is between -2.5. In that case, the length is measured between each of the respective free ends of the segments 302, 305 and the opposite end 303, 306. In an exemplary embodiment, the ratio of the length of the first gasket segment 301 to the second gasket segment 304 is between 1.6 - 2.0.
    [097] Preferably, the first gasket segment 301 and the second gasket segment 304 both have a thickness between 0.89 and 1.02 centimeters (0.35 and 0.40 inches). Of course, there can be variations. In one embodiment, gasket 342 is made of a compressive material having a strength of 27.6 - 34.5 kPa (4 - 5 psi) at 25 percent compression. A useful material is EDPM sponge. Other materials that are useful include polyurethane, foamed polyurethane, rubber and silicone, just to name a few examples. Many materials are useful.
    [098] In use, gasket 342 creates a seal between side gasket element 342 and tubular sheet 360 (Figure 16). In particular, in preferred embodiments, the seal is created between the outer surface 308 of the first gasket segment 301 and the outer surface 309 of the first end 303 of the first gasket segment 301. Note that in the embodiment shown, the surfaces 309 and 308 are usually orthogonal or perpendicular to each other.
    [099] In an exemplary embodiment, the filter cartridge 320 includes at least one cable 345, to allow handling and manipulation of the cartridge 320. In the illustrated embodiment, at least one cable 345 is attached, connected, or secured to one of the second side panel 337, third side panel 338 and fourth side panel 339. Although several embodiments are possible, that embodiment shown includes a cable 345 attached to fourth side panel 339, and a second cable 345 attached to third side panel 338 (Figure 10) . Cables 345 are shown centered on panels 338, 339. Cables 345 have a clamping spring 347, which is movable against panels 338, 339 at a position remote from panels 338, 339 so that they can be tightened by 4 fingers of a typical sized adult hand.
    [0100] Referring then to Figures 13 and 14, another embodiment of an air filter cartridge is illustrated at 320'. The air filter cartridge 320' has the same features as the air filter cartridge 320, with the exception of the arrangement of the side gasket element 342'. In that embodiment, the air filter cartridge 320' includes a gasket mounting face 346 (Figure 14), projecting and spaced from a remaining portion of the air filter cartridge 320'. The gasket mounting face 346 is angled relative to a plane containing the perimeter gasket element 341'. Gasket mounting face 346 supports side gasket element 342'.
    [0101] Typically, the gasket mounting face 346 will be angled from 45 degrees to -180 degrees with respect to a downstream flow face 326'. Many useful embodiments will include gasket mounting face 346, being angled from 30 degrees to -150 degrees, relative to downstream flow face 326'. As can be seen from Figure 14, the side gasket element 342' is spaced apart from the first side panel 336'. B. Exemplary dust collector, figures 15 and 16
    [0102] Figures 15 and 16 show an exemplary embodiment of a dust collector 350, which uses filter cartridges of the type characterized above. The 350 dust collector is used to filter air. For example, the dust collector 350 can be used to remove dust and other types of particulate matter from the air. In general, dust collector 350 includes a housing 352. Housing 352 can be made of sheet metal or other types of rigid materials. Housing 352 forms an enclosure 353, with an internal volume 354.
    [0103] Housing 352 has an unfiltered or dirty air inlet 356 and a filtered or clean air outlet 358. Generally, unfiltered air enters the dust collector 350 through the dirty air inlet 356. The filter cartridges of air 320, oriented inside the dust collector 350, remove dust and other particulate matter from the air, and then the filtered, clean air is discharged from the dust collector 350 through the clean air outlet 358.
    [0104] The dust collector 350 further includes a tubular sheet 360. The tubular sheet 360 functions as a wall, which separates the internal volume 354 from the housing 352, between an unfiltered air enclosure 362 and a filtered air enclosure 364. Tubular sheet 360 has a plurality of holes or openings 366 therethrough. Apertures 366 are for allowing filtered air to flow from the downstream flow face 326, air filter cartridges 320, through tubular sheet 360, to the filtered air enclosure 364, and then through the clean air discharge 358.
    [0105] The tubular sheet 360 defines a sealing surface 368. The sealing surface 368 is located on the side of the tubular sheet 360 in the unfiltered air enclosure 362. In the embodiment shown, the sealing surface 368 is adjacent to the openings 366. The sealing surface 368 forms a seal 370 (Figure 16) between and against the tubular sheet 360 and the air filter cartridge 320. In particular, the seal 370 is formed between and against the sealing surface 368 of the tubular sheet 360 and the gasket member side 342 of the air filter cartridge 320.
    [0106] The housing 352 further includes a frame arrangement 372. The frame arrangement 372 extends from the tubular sheet 360. The frame arrangement 372 helps to retain and support the air filter cartridges 320 in the dust collector 352. frame arrangement 372 includes a surface, which forms a seal with gasket arrangement 340 of air filter cartridge 320. In particular, a seal 382 (Figure 16) is formed between and against frame arrangement 372 and the frame member. air filter cartridge 320 perimeter gasket 341.
    [0107] In this embodiment, a frame arrangement 372 further includes a bar 388, spaced apart from the tubular sheet 360. The bar 388 has a sealing surface, which forms a seal 391 (Figure 16) with the perimeter gasket element 341 of the arrangement of gasket 340 of air filter cartridge 320.
    [0108] In general, the bar 388 extends parallel to the tubular sheet 360. The air filter cartridges 320 are operatively installed between the bar 388 and the tubular sheet 360, with assistance in holding the filter cartridges 320 in place by use of the trays 374.
    [0109] In the embodiment shown, the air filter cartridges 320 are installed in the dust collector 350 in pairs of filters 392. Each pair of filter elements 392 includes first and second air filter cartridges 320 being oriented in the housing 352, horizontally adjacent to each other and generally angled in an outward direction as they extend from bar 388 to tubular sheet 360. As can be seen from Figure 16, bar 388 is located between each of the filter cartridges of air 320 in the pair of filters 392. As can be seen from Figure 16, the span or volume of air 406 between respective downstream sides 326 of the air filter cartridges 320 increases as the distance increases from the bar 388 for tubular sheet 360. This forms a type of V-filter arrangement.
    [0110] The dust collector 350 further includes a reverse pulse cleaning arrangement 396. The reverse pulse cleaning arrangement 396 is constructed and arranged to emit a pulse of air from the filtered air enclosure 364 by downstream flow faces 326 of each of the air filter cartridges 320. By pulsing the clean air side air through the downstream flow faces 326, dust and other debris, which clog the upstream flow faces 324 of the air filter cartridges 320 are displaced and released by taps of the air filter cartridge 320. From it, the dust and debris fall by gravity into a sump 398 located below the cartridge arrangement 320. The reverse pulse cleaning arrangement 396 preferably includes at least one nozzle 400, for each opening 366 in the tubular sheet 360. The nozzles 400 are in air flow communication with a shunt 402 which is connected to the source of pressurized air. Reverse pulse cleaning arrangement 396 periodically sends a pulse of air, through tap 402, to nozzles 400. The pulse of air exits each nozzle 402 and flows through openings 366. The air then flows in a reverse direction, through normal air flow direction, by air filter cartridges 320.
    [0111] In the preferred embodiment shown, all openings 366 include a venturi tube 404, to help direct the air pulse from the nozzle 400 through the openings 366, and into the volume 406 (Figure 16), between the downstream flow faces 326 of opposing filter cartridges 320, in each pair of filter elements 392. Venturi tube 404 circumscribes each respective opening 366 and helps ensure that the air pulse is directed evenly into volume 406.
    [0112] The dust collector 350 further includes a guide ramp 408. The guide ramp 408 protrudes from the tubular sheet 360 and is adjacent to the sealing surface of the tubular sheet 368. The ramp 408 is constructed and arranged to guide all cartridges of air filters 320, in sealing engagement against the sealing surface of tubular sheet 368. As can be seen in Figure 15, ramp 408 is angled from tubular sheet 360 in a direction that is generally coplanar and not orthogonal with relation to tubular sheet 360. In practice, as each filter cartridge 320 is installed in the dust collector housing 352, the end of the air filter cartridge 320 closest to the tubular sheet 360 is coupled to the chute 408. The chute 408 helps to slide and guide the air filter cartridge 320 into place with the side gasket element 342, engaging and abutting the sealing surface 368 of the tubular sheet 360. In the embodiment shown, there is a pair of guide ramps 408 , a 408 guide ramp for each side of filter pairs 392. That is, there is a guide chute 408 on the sides of the tubular sheet 360, with openings 366 between the chutes 408.
    [0113] The dust collector 350 further includes a clamping arrangement 410. The clamping arrangement 410 is for operatively securing the pairs of filtering elements 392, in sealing engagement with the tubular sheet 360 and the frame arrangement 372.
    [0114] It should be understood that each air filter cartridge 320 fits operatively within housing 352. The end of air filter cartridge 320 will engage guide ramp 408, which will help guide and steer the cartridge 320 for sealing engagement against the tubular sheet 360. The side gasket element 342 will mate against the sealing surface 368 of the tubular sheet 360. At the same time, the perimeter gasket element 341 will mate against the sealing surface of the frame arrangement 372 and the sealing surface of bar 388. Fastener arrangement 410 is oriented by the ends of a pair of filter elements 392 and coupled, pushing the pair of filter elements 392 against tubular sheet 360.
    [0115] In use, the dirty air is directed by the dirty air inlet 356 to the unfiltered air enclosure 362 of the housing 352. The dirty air is then directed by the upstream flow faces 324 of the medium housing 322 of a first air filter cartridge 320. In this embodiment, dirty air will be directed by the upstream flow face 324 of each pair of filter elements 392. Dirty air is prevented from bypassing the air filter cartridge 320 by the filter element. perimeter gasket 341 and by side gasket element 342, both forming seals 382, 370 with housing 352. During use, air filter cartridges 320 will periodically receive a counter jet to remove dust and debris by pulsation of the reverse pulse cleaning arrangement 396. This will send jets of air through the downstream flow face 326 and the upstream flow face 324. This will help to knock out dust and debris from the media package 322. powder and frag nts will fall by gravity into storage 398.
    [0116] After a period of use, the air filter cartridges will need replacement. Each air filter cartridge 320 of each pair of filter elements 392 is removed from housing 352. Used filter cartridge 320 is recycled, incinerated or otherwise disposed of. A new filter cartridge 320 is then provided and installed.
    [0117] The foregoing provides examples of the principles of the invention. Many embodiments can be elaborated using these principles. It should be noted that not all of the specific aspects described in this descriptive report need to be incorporated into a provision for it to have some of the selected advantages in accordance with the present invention.
    权利要求:
    Claims (29)
    [0001]
    1. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a medium housing (322), having opposite upstream and downstream flow faces (324, 326), first and second opposite sides (328, 329) extending between opposite upstream and downstream flow faces (324, 326); and opposing third and fourth sides (330, 331) extending between opposite upstream and downstream flow faces (324, 326); (b) first and second side panels (336, 337) arranged parallel to each other with the medium housing (322) therebetween; (c) a third side panel (338) against the third side of the media housing (322); (d) a fourth side panel (339) against the fourth side of the media housing (322); (e) a cable (345) secured to at least one of the first, second, third and fourth side panels (336, 337, 338, 339); and (f) a gasket arrangement (340) including: (i) a perimeter gasket element (341) around a perimeter of the downstream flow face (326) to form a window (343); with an opening in the window (343) exposing the downstream flow face (326); and (ii) a side gasket member (342) adjacent to the perimeter gasket member (341) without a gap therebetween, and adjacent to at least a partial extension of the first side panel (336); the side gasket element (342) including no part against the second side panel (337), third side panel (338) and fourth side panel (339); the side gasket element (342) configured to create a compression seal of the side gasket element (342) with a tubular sheet when the air filter cartridge (320) is installed in a tubular sheet.
    [0002]
    2. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the side gasket element (342) and the perimeter gasket element (341) include at least two separate pieces secured or fitted together .
    [0003]
    3. Air filter cartridge (320), according to claim 2, CHARACTERIZED by the fact that the side gasket element (342) extends against the first side panel (336) of the downstream flow face (326) , at a distance not exceeding 40% of the total length of the first side panel (336).
    [0004]
    4. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the side gasket element (342) is angled 30-60° in relation to the downstream flow face (326).
    [0005]
    5. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the side gasket element (342) is angled 45-50° in relation to the downstream flow face (326).
    [0006]
    6. Air filter cartridge (320) according to claim 1, CHARACTERIZED by the fact that the media packaging (322) comprises a stack (201) of strips of single-sided filter media material, each strip including a grooved half sheet attached to a grooved and oriented half sheet of each grooved sheet, extending in a direction between the upstream and downstream flow faces (324, 326).
    [0007]
    7. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the medium packaging (322) includes one of pleated medium or Z medium.
    [0008]
    8. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that it also includes adhesive that fixes the gasket arrangement (340) to the cartridge (320).
    [0009]
    9. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the first side panel (336), second side panel (337), third side panel (338) and fourth side panel (339 ) comprise rigid plastic.
    [0010]
    10. Air filter cartridge (320), according to claim 1, CHARACTERIZED by the fact that the first side panel (336), second side panel (337), third side panel (338) and fourth side panel (339 ) comprise metal.
    [0011]
    11. Gasket for use with a filter cartridge (320), as defined in any one of claims 1 to 10, the gasket CHARACTERIZED in that it comprises: (a) a first gasket segment (301) having a free end and a first opposite end; (b) a second gasket segment (304) having a free end and an opposite second end; (i) the second gasket segment (304) being angled relative to the first gasket segment (301) at an angle of 20 - 70°; (ii) a ratio of a length of the first gasket segment (301) to the second gasket segment (304) being between 1 - 2.5; and (c) an intermediate gasket segment (344) joining the first end of the first gasket segment (301) and the second end of the second gasket segment (304); (1) the first gasket segment (301), the second gasket segment (304) and the intermediate gasket segment (344) jointly defining an open filter cartridge receiving cavity (320), constructed and disposed. to receive a filter cartridge (320).
    [0012]
    12. Gasket according to claim 11, CHARACTERIZED by the fact that: (a) the first gasket segment (301) and the second gasket segment (304) both have a thickness of 0.89 to 1.02 centimeters (0.35 to 0.40 inch); (b) the ratio of a length of the first gasket segment (301) to the second gasket segment (304) is 1.6 - 2.0; (c) the gasket is made of a compressive material having a strength of 20.7 to 34.5 kPa (3 - 5 psi), at a compression of 25%.
    [0013]
    13. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a medium housing (322) having opposite upstream and downstream flow faces (324, 326), first and second opposite sides ( 328, 329) extending between opposing upstream and downstream flow faces (324, 326); and opposing third and fourth sides (330, 331) extending between opposite upstream and downstream flow faces (324, 326); the media packaging (322) comprises a stack of strips of single-faced filter media material, each strip including a half-grooved sheet attached to a half-faced sheet and oriented with grooves of each grooved sheet, extending in one direction. between the upstream and downstream flow faces (324, 326); (b) a first side panel (336) against the first side (328) of the media housing (322); (c) a second side panel (337) against the second side (329) of the medium housing (322); (d) a third side panel (338) against the third side (330) of the media housing (322); (e) a fourth side panel (339) against the fourth side (331) of the media housing (322); and (f) a gasket arrangement (340) including: (i) a perimeter gasket element (341) against the downstream flow face (326) and around a perimeter of the downstream flow face (326); and (ii) a side gasket element (342) adjacent to at least a partial extension of the first side panel (336); the side gasket element (342) including no part against the second, third and fourth side panels (339); (A) the side gasket element (342) extends against the first side panel (336) of the downstream flow face (326) at a distance not greater than 40% of a total length of the first side panel (336) ; and (g) a handle (345) attached to the cartridge (320).
    [0014]
    14. Air filter cartridge according to claim 13, CHARACTERIZED by the fact that: (a) the side gasket element (342) and the perimeter gasket element (341) are adjacent to each other without a gap between they and include two separate pieces fastened or snapped together.
    [0015]
    15. Air filter cartridge, according to claim 13, CHARACTERIZED by the fact that: (a) the side gasket element (342) and the perimeter gasket element (341) are molded in a single unitary piece.
    [0016]
    16. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a filter medium housing (322) having opposite upstream and downstream flow faces (324, 326) and first and second sides faces (328, 329) extending between opposing upstream and downstream flow faces (324, 326); (i) the filter media package (322) comprises a stack of strips of single-sided filter media material, each strip including a sheet of half-grooved affixed to a sheet of half-faced and oriented with grooves of each sheet. grooved, extending in a direction between the upstream and downstream flow faces (324, 326); (j) a first side panel (336) against the first side (328) of the media housing (322); and (k) a gasket arrangement (340) including: (i) a perimeter gasket element (341) against the downstream flow face (326) and around a perimeter of the downstream flow face (326 ); and (ii) a side gasket element (342) adjacent to at least a partial extension of the first side panel (336); the side gasket element (342) being angled relative to the downstream flow face (326) at an angle of 20-80 degrees.
    [0017]
    17. Air filter cartridge (320), according to claim 16, CHARACTERIZED by the fact that: (a) the upstream flow face (324) and the downstream flow face (326) are parallel, flat and flat; (b) the media housing (322) further includes opposing third and fourth sides (330, 331) that extend between opposing upstream and downstream flow faces (324, 326); and (c) the air filter cartridge (320) further includes: (i) a second side panel (337) against the second side of the media housing (322); (ii) a third side panel (338) against the third side of the media housing (322); and (iii) a fourth side panel (339) against the fourth side of the media housing (322).
    [0018]
    18. Air filter cartridge (320), according to claim 17, CHARACTERIZED by the fact that: (a) the side gasket element (342) does not include any part against the second, third and fourth side panels (339 ).
    [0019]
    19. Air filter cartridge according to claim 16, CHARACTERIZED by the fact that the side gasket element (342) includes at least the portion adjacent to the first side panel (336) and an intermediate segment bridging the first side panel (336) and downstream flow face (326).
    [0020]
    20. Air filter cartridge (320), according to claim 16, CHARACTERIZED by the fact that the side gasket element (342) includes a segment against the downstream flow face (326).
    [0021]
    21. Air filter cartridge according to claim 16, CHARACTERIZED by the fact that it further comprises: (a) a cable (345) attached to a part of the cartridge (320).
    [0022]
    22. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a media housing (322) having opposite upstream and downstream flow faces (324, 326) and opposite first and second sides ( 328, 329) extending between opposing upstream and downstream flow faces (324, 326); (i) the media packaging (322) comprises a stack of strips of single-faced filter media material, each strip including a half-grooved sheet attached to a half-faced sheet and oriented with grooves of each grooved sheet, extending in a direction between the upstream and downstream flow faces (324, 326); (j) ) the upstream flow face (324) and the downstream flow face (326) being parallel, and each strip of the medium housing (322) being angled relative to a horizontal surface of the upstream flow face (324) to the downstream flow face (326) at an angle of 20-80 degrees; (k) a first side panel (336) against the first side (328) of the media housing (322); and (l) a gasket arrangement (340) including: (i) a perimeter gasket element (341) against the downstream flow face (326) and around a perimeter of the downstream flow face (326 ); and (ii) a side gasket element (342), integral with the perimeter gasket element (341) and adjacent to at least a partial extension of the first side panel (336).
    [0023]
    23. Air filter cartridge according to claim 22, CHARACTERIZED by the fact that: (a) the media packaging (322) further includes opposing third and fourth sides (330, 331) that extend between the faces of upstream and downstream opposing outflow (324, 326); and (b) the air filter cartridge (320) further includes: (i) a second side panel (337) against the second side of the media housing (322); (ii) a third side panel (338) against the third side of the media housing (322); and (iii) a fourth side panel (339) against the fourth side of the media housing (322); (c) the side gasket element (342) does not include any portion against the second, third and fourth side panels (339); and (d) the side gasket element (342) extends against the first side panel (336) of the downstream flow face (326) at a distance not greater than 40% of a total length of the first side panel (336) .
    [0024]
    24. Air filter cartridge (320) according to claim 22, CHARACTERIZED in that it further includes: (a) a gasket mounting face protruding and spaced from a remaining portion of the air filter cartridge (320), the gasket mounting face being angled to a plane of the perimeter gasket element (341); (1) the gasket mounting face supporting the side gasket element (342).
    [0025]
    25. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a medium housing (322) having opposite upstream and downstream flow faces (324, 326), first and second opposite sides ( 328, 329) extending between opposing upstream and downstream flow faces (324, 326); and opposing third and fourth sides (330, 331) extending between opposite upstream and downstream flow faces (324, 326); (b) a first side panel (336) against the first side (328) of the media housing (322); (c) a second side panel (337) against the second side of the media housing (322); (d) a third side panel (338) against the third side of the media housing (322); (e) a fourth side panel (339) against the fourth side of the media housing (322); and (f) a gasket arrangement (340) including: (i) a perimeter gasket element (341) against the downstream flow face (326) and around a perimeter of the downstream flow face (326 ); and (ii) a side gasket element (342), integral with the perimeter gasket member (341) and adjacent to at least a partial extension of the first side panel (336); the side gasket element (342) including no part against the second, third and fourth side panels (339).
    [0026]
    26. Air filter cartridge (320) according to claim 25, CHARACTERIZED by the fact that: (a) the media packaging (322) comprises a stack of strips of single-sided filter media material, each strip including a grooved half sheet secured to a grooved and oriented half sheet of each grooved sheet, extending in a direction between the upstream and downstream flow faces (324, 326); and (b) a cable (345) is attached to at least one of the first, second, third, and fourth side panels (339).
    [0027]
    27. Air filter cartridge (320), CHARACTERIZED by the fact that it comprises: (a) a media housing (322) having opposite upstream and downstream flow faces (324, 326) and opposite first and second sides ( 328, 329) extending between opposing upstream and downstream flow faces (324, 326); (b) a first side panel (336) against the first side of the media housing (322); and (c) a gasket arrangement (340) including: (i) a perimeter gasket element (341) against the downstream flow face (326) and around a perimeter of the downstream flow face (326 ); (ii) a side gasket member (342), integral with the perimeter gasket member (341) and adjacent to at least a partial extension of the first side panel (336); and (d) a gasket mounting face (346) projecting and spaced apart from a remaining portion of the air filter cartridge (320), the gasket mounting face (346) being angled to a plane of the gasket element. perimeter (341); (1) the gasket mounting face (346) supporting the side gasket element (342).
    [0028]
    28. Air filter cartridge according to claim 27, CHARACTERIZED by the fact that: (a) the media packaging (322) further includes opposing third and fourth sides (330, 331) that extend between the faces of upstream and downstream opposing outflow (324, 326); and (b) the air filter cartridge (320) further includes: (i) a second side panel (337) against the second side (329) of the media housing (322); (ii) a third side panel (338) against the third side (330) of the media housing (322); and (iii) a fourth side panel (339) against the fourth side (331) of the media housing (322).
    [0029]
    29. Air filter cartridge (320), according to claim 27, CHARACTERIZED by the fact that: (a) the side gasket element (342) does not include any part against the second (337), third (338) and four side panels (339); and (b) the media packaging (322) comprises a stack of strips of single-faced filter media material, each strip including a grooved half sheet secured to a faceted half sheet and oriented with grooves of each grooved sheet, if extending in a direction between the upstream and downstream flow faces (324, 326).
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    US8771395B2|2014-07-08|
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    MX2012004319A|2012-05-08|
    WO2011046782A3|2011-06-16|
    EP2322263A1|2011-05-18|
    US20140284886A1|2014-09-25|
    US20170182444A1|2017-06-29|
    TWI546116B|2016-08-21|
    US20170361255A1|2017-12-21|
    BR112012008989A2|2020-10-20|
    EP2322263B1|2014-07-02|
    EP2488276B1|2015-09-02|
    US20110083559A1|2011-04-14|
    CL2010001119A1|2011-08-26|
    CA2777529A1|2011-04-21|
    US8617276B2|2013-12-31|
    US8491691B2|2013-07-23|
    US20130298770A1|2013-11-14|
    AU2010307115A1|2012-05-03|
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    WO2011046782A2|2011-04-21|
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    法律状态:
    2020-10-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-02| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-07-27| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-31| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 06/10/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    US25149309P| true| 2009-10-14|2009-10-14|
    US61/251,493|2009-10-14|
    US33466510P| true| 2010-05-14|2010-05-14|
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    US36065910P| true| 2010-07-01|2010-07-01|
    US61/360,659|2010-07-01|
    PCT/US2010/051603|WO2011046782A2|2009-10-14|2010-10-06|Filter cartridge with seal member and methods|
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