US20140305088A1 - Filter Element, Filter Device and Method for Producing a Filter Element - Google Patents
Filter Element, Filter Device and Method for Producing a Filter Element Download PDFInfo
- Publication number
- US20140305088A1 US20140305088A1 US14/312,775 US201414312775A US2014305088A1 US 20140305088 A1 US20140305088 A1 US 20140305088A1 US 201414312775 A US201414312775 A US 201414312775A US 2014305088 A1 US2014305088 A1 US 2014305088A1
- Authority
- US
- United States
- Prior art keywords
- fold
- filter
- end section
- filter medium
- legs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 239000000463 material Substances 0.000 claims description 68
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
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- 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
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
- B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
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- B29C66/133—Fin-type joints, the parts to be joined being flexible
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- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
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- B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
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- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
- B29C66/5432—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles joining hollow covers and hollow bottoms to open ends of container bodies
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- B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
- B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
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- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
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- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1051—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by folding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
Definitions
- This disclosure concerns a filter element, in particular with multi-layer filter media such as nonwoven filter materials. Moreover, a filter device and a method for connecting flat media are described.
- filter elements are manufactured, for example, from initially zigzag-folded filter material sheets that are shaped to a tubular body. In order to close the tubular body, terminal fold sections must then be fluid-tightly connected to each other.
- connection metal clips or clamps, for example, were used that hold together two flat sections resting on each other. It is also common to adhesively connect the two filter material sheets with each other or to connect them by fusing. In particular in case of multi-layer filter media, for example, several layers of thin nonwoven material that is impregnated or comprises special intermediate layers, it is difficult to prevent fraying of the edges that are resting on each other. A special difficulty resides in that the flat media to be connected must be connected fluid-tightly, i.e., the fluid to be filtered may not pass unfiltered at the connecting location through the filter material.
- An object of the present invention is to provide an improved filter element, in particular with connected terminal fold sections of filter bellows media.
- a filter element has a first and a second end section of a filter medium.
- the first and the second end sections are connected flat with each other wherein a sheathing that is compressed with the end sections encloses the terminal edges of the end sections.
- nonwoven filter materials are conceivable.
- a starting material generally sheets of an appropriate filter nonwoven are cut, folded, and subsequently end sections are connected to each other. This results then in an endless filter bellows that is processed further.
- the end sections and the sheathing have preferably the same material. In this way, processing can be realized in a particularly beneficial way and the disposal of a used or soiled filter element requires no special measures.
- the sheathing can be, for example, in the form of a V-shaped or U-shaped profile wherein the end sections are then inserted into the space between the legs of the U or V and subsequent compression is carried out. In this way, the edges that may have the tendency to fray are completely enclosed by the sheathing.
- the sheathing is formed of a flat filter medium with at least one longitudinal fold. Between the first and second fold legs of the sheathing, the end sections are provided.
- the longitudinal folding is realized, for example, parallel to an edge of the corresponding sheathing strip.
- a filter element has a first and a second end section of a flat filter medium.
- the first end section has a fold with two fold legs and the end section of the second end section is positioned between the fold legs and is compressed therewith.
- a filter element has accordingly a flat filter material with at least two end sections wherein the two end sections are fixed on each other and no open terminal edges is existing since either the sheathing encloses both terminal edges or one of the end sections encloses the terminal edge of the other end section.
- the end sections may originate from a single, for example, folded, filter material sheet or also several sheets or leaves of filter material may be connected to each other.
- the filter medium can have several layers wherein, for example, between the layers an absorbent material such as active carbon particles may be filled in.
- filter media are used that between two layers have active carbon particles that absorb dirt or odor.
- by means of sheathing or enclosure of the terminal edge of at least one of the end sections it is achieved that the layers will not fray or that introduced particles between the layers cannot flow out of the filter element.
- the end section in the alternative embodiment can also have several folds with the same fold orientation.
- the section can form, for example, a U-shaped or V-shaped profile into which the edge of the second end section is inserted.
- the filter element is formed of a filter medium that is folded multiple times in a zigzag shape.
- the zigzag folding increases the surface area of the filter element through which the fluid to be filtered flows, for example, air or fuel.
- the end sections, the sheathing and/or the fold legs can be glued in addition. It is also conceivable that the end sections, the sheathing and/or the fold legs are compressed with each other with profiling. By embossment of a profile or a structure during compression, an improved connection for non-woven filter media results.
- a filter device that has a corresponding filter element and embodies as operating medium filter, for example, a fuel filter or an air or passenger compartment filter for a motor vehicle.
- a method for producing a filter element it is provided: connecting a first end section of a flat filter medium with a second end section of a flat filter medium wherein the terminal edges of the end sections are enclosed by a sheathing. The sheathing is moreover compressed together with the end sections.
- a filter element In a variant of the manufacturing process for a filter element it is provided: connecting a first with a second end section of a flat filter medium.
- the first end section is provided with a fold with two fold legs and the second end section is compressed between the fold legs with the latter.
- Compression or connection of the end sections with the sheathing or the fold legs can be realized, for example, by ultrasound, fusing or laser welding.
- FIG. 1 is a schematic perspective illustration of a first embodiment of a filter element
- FIG. 2 is a schematic a perspective illustration of a second embodiment of a filter element
- FIGS. 3-5 are detailed illustrations of end sections of the filter medium connected to each other;
- FIGS. 6 , 7 are schematic illustrations for explaining variants of the manufacturing process for filter elements
- FIG. 8 is a schematic section illustration of an alternative embodiment of end sections of the filter medium connected to each other;
- FIG. 9 is a schematic illustration of an embodiment of a filter device.
- FIGS. 10A and 10B are schematic illustrations for explaining a further variant of the manufacturing process for filter elements.
- FIG. 1 shows a first embodiment of a filter element.
- the filter element 1 is formed of a sheet of flat filter medium such as a nonwoven filter material.
- rectangular nonwoven filter material sheets are shaped such that end sections of the sheet 3 are resting on each other.
- an endless filter bellows 2 is formed thereby wherein the end sections 3 are secured by a sheathing 4 .
- the filter element 1 can for example be inserted in a filter device in a filter cup such that the fluid to be filtered, for example, fuel, oil or also air, must pass through the filter medium and is purified thereby.
- FIG. 2 shows a perspective illustration of a second embodiment wherein a filter element 10 is formed of a zigzag-folded nonwoven filter material.
- the zigzag-shaped filter material is formed to a bellows 2 in that end sections or terminal fold sections 3 are connected to each other.
- end sections or terminal fold sections 3 are connected to each other.
- the connection of the end sections 3 of the flat filter material is illustrated in the following Figures in more detail.
- FIG. 3 a detail of a filter element is shown that illustrates two connected end sections of the filter material sheet.
- a first filter material sheet 2 A and a second filter material sheet 2 B are illustrated.
- the end sections are identified by reference characters 3 A and 3 B.
- the end sections correspond thus to a predetermined strip of a rim or edge 9 of the respective filter material sheet 2 A. 2 B. Since in FIG. 3 and also in the following Figures only a detail of the area of the end sections 3 A, 3 B connected to each other is illustrated, the filter material sheets 2 A and 2 B may originate also from a single filter material sheet as, for example, illustrated in FIG. 1 or 2 .
- the two end sections 3 A, 3 B that are resting flat on each other are enclosed by a sheathing 4 .
- the sheathing 4 is formed, for example, also of the same filter material and has in the embodiment of FIG. 3 a U-shaped profile.
- the U-shaped profile results from the dual folding 5 A, 5 B of a strip of filter material.
- the compression can be realized by high-pressure action assisted by laser welding or ultrasonic action. In this way, the filter media at least partially will join and this leads to a fluid-tight connection with each other.
- FIG. 4 shows an alternative embodiment with two filter material sheets 2 A, 2 B.
- a sheathing 4 is provided which, in comparison to FIG. 3 , has a V-shaped profile.
- the end sections 3 A, 3 B of the flat filter medium 2 A, 2 B are positioned between the two fold legs 4 A, 4 B that are formed by the longitudinal fold 5 of the sheathing.
- the two terminal edges 9 of the end sections 3 A, 3 B can press, for example, at the inner side against the fold edge 5 of the sheathing 4 .
- FIG. 5 A further variant for the connection of two end sections of flat filter materials is illustrated in FIG. 5 .
- a first filter material sheet 2 A and a second filter material sheet 2 B are illustrated. As already indicated, they can also be oppositely positioned end sections of a single filter material sheet.
- the end section 3 A of the first filter material sheet 2 A at the bottom in FIG. 5 , is provided with a fold 5 .
- the end section 3 A can also be understood as being provided with a V-shaped profile. In this way, by the fold 5 , parallel to the terminal edge 9 of the end section 3 A, two fold legs 6 A and 6 B are produced. Between the fold legs 6 A and 6 B the end section 3 B of the second filter material sheet 2 B is inserted.
- the three layers i.e., the upper first fold leg 6 A, the end section 3 B of the second filter material sheet 2 B, and the lower fold leg 6 B of the first end section 3 A are compressed with each other or joined.
- FIG. 6 a manufacturing process for corresponding filter elements in which end sections are connected to each other is schematically explained.
- two zigzag-folded filter media 2 A, 2 B are illustrated.
- a terminal fold section is placed between the legs of a U-shaped sheathing 4 .
- the terminal edges 9 abut the central leg 24 of the sheathing 4 .
- a spacing between the terminal edges 9 and the facing side of the central leg 24 of the sheathing 4 may exist.
- the layers of the sheathing are compressed with the terminal (fold) sections.
- a sonotrode 12 and an anvil 11 are pressed together.
- the sonotrode generates ultrasound that is matched, for example, to the material to be connected in order to achieve a particularly reliable connection of the material layers with each other.
- FIG. 7 a manufacturing process for producing a connection as illustrated in FIG. 5 is illustrated.
- Two zigzag-folded filter materials 2 A, 2 B are illustrated again.
- An end section of the first filter material sheet 2 A is provided with a fold 5 and comprises thus two fold legs 6 A and 6 B as well as a fold edge 5 .
- the terminal edge 9 of the second end section of the second filter material sheet 2 B is inserted between the fold legs 6 A and 6 B.
- compression of the layers with each other is carried out, for example, by using an anvil 11 and a sonotrode 12 .
- both elements can be pressed against each other or only one of them, for example, only the sonotrode is designed to be movable.
- FIG. 8 shows a section illustration of an alternative embodiment for end sections connected to each other of a filter medium. In this connection, multi-layer filter media are illustrated. FIG. 8 shows only the end sections connected to each other in cross-section.
- the filter media 2 A, 2 B each have two layers 7 , 8 of a nonwoven filter material. Between the layers 7 , 8 , for example, active carbon particles 19 are strewn that serve as an absorber.
- the sheathing is formed of a simple strip of nonwoven material but can also be a plastic profile that is provided with three parallel folds 5 A, 5 B, and 5 C with the same orientation.
- the sheathing comprises therefore fold legs or fold sections 4 A, 4 B, 4 C, and 4 D that are each defined by the folds 5 A, 5 B, 5 C and the edges 23 .
- FIG. 8 shows that the terminal edge 9 of the filter medium 2 A, 2 B is enclosed by the sheathing. This means in particular that the active carbon particles 19 cannot fall out.
- FIG. 9 shows a filter device, for example, as a fuel filter, that is embodied with an afore described filter element 10 .
- the filter device or the fuel filter 13 compromises a folded bellows 2 that is formed of zigzag-folded filter material and is secured between two covers 14 , 15 .
- the folded bellows 2 corresponds to a filter element 10 in which two end sections 3 are joined by compression with each other.
- the connecting possibilities as illustrated in FIG. 3-5 or 8 can be used.
- the upper cover 15 is provided with a connector 16 that has an opening 18 .
- the fluid to be filtered can enter for example in the direction of arrow 17 into the interior of the folded bellows 2 and can flow out by passing through the folds of the filter material.
- the filter element can be inserted into a filter cup or an angular bellows can be formed.
- FIG. 10 shows a further variant of a connection of two filter material end sections or method steps for producing the same.
- FIG. 10A shows similar to FIGS. 6 and 7 zigzag-folded filter materials 2 A, 2 B.
- the end section 3 A of the first filter material is folded twice in the same orientation, as indicated by the reference characters 5 A and 5 B and encloses the end section 3 B of the second filter material sheet 2 B.
- Sonotrode 12 and anvil 11 are provided with a profiling, for example, knurling. This means that upon compression of the end sections 3 A, 3 B, for example, a slightly zigzag-shaped or irregular profile is embossed into the material layers.
- FIG. 10B the result of the two end sections or filter sheets 2 A, 2 B compressed with each other is illustrated. Because of the multiple folding or embossment a particularly fast and reliable fluid-tight joining or connection of the two end sections 3 A, 3 B is provided.
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Abstract
A filter element (1) has first and second end sections (3A, 3B) of a flat filter medium which are secured to one another. A sheathing (4) is provided, wherein said sheathing is compressed by the end sections (3A, 3B) and surrounds the end edges (9) of the end sections (3A, 3B). Alternatively, the filter element (1) has first and second end sections (3A, 3B) of a flat filter medium, wherein the first end section (3A) has a fold (5) having two fold legs (6A, 6B). The end section (3B) of the second end section (2B) is then compressed between the fold legs (6A, 6B).
Description
- This application is a divisional of U.S. application Ser. No. 12/452,455 filed Apr. 20, 2012 and which will issue as U.S. Pat. No. 8,757,394 on Jun. 24, 2014. U.S. application Ser. No. 12/452,455 is a bypass Continuation of international patent application no. PCT/EP2010/064977, filed Oct. 7, 2010 designating the United States of America, the entire disclosure of which is incorporated herein by reference. Priority is claimed based on German patent application no. 10 2009 050 257.2, filed Oct. 21, 2009.
- This disclosure concerns a filter element, in particular with multi-layer filter media such as nonwoven filter materials. Moreover, a filter device and a method for connecting flat media are described.
- In order to filter, for example, in the automotive field, fluids such as fuels, operating media or passenger compartment air, folded or pleated nonwoven filter materials are frequently used. In this connection, it is often required to connect various edges or end sections of these flat filter materials with each other. Known filter elements are manufactured, for example, from initially zigzag-folded filter material sheets that are shaped to a tubular body. In order to close the tubular body, terminal fold sections must then be fluid-tightly connected to each other.
- In the past, in this connection metal clips or clamps, for example, were used that hold together two flat sections resting on each other. It is also common to adhesively connect the two filter material sheets with each other or to connect them by fusing. In particular in case of multi-layer filter media, for example, several layers of thin nonwoven material that is impregnated or comprises special intermediate layers, it is difficult to prevent fraying of the edges that are resting on each other. A special difficulty resides in that the flat media to be connected must be connected fluid-tightly, i.e., the fluid to be filtered may not pass unfiltered at the connecting location through the filter material.
- An object of the present invention is to provide an improved filter element, in particular with connected terminal fold sections of filter bellows media.
- Accordingly, a filter element has a first and a second end section of a filter medium. The first and the second end sections are connected flat with each other wherein a sheathing that is compressed with the end sections encloses the terminal edges of the end sections.
- As a filter medium, in particular nonwoven filter materials are conceivable. As a starting material generally sheets of an appropriate filter nonwoven are cut, folded, and subsequently end sections are connected to each other. This results then in an endless filter bellows that is processed further.
- The end sections and the sheathing have preferably the same material. In this way, processing can be realized in a particularly beneficial way and the disposal of a used or soiled filter element requires no special measures.
- By compression, for example, by plungers that are pressed against each other by employing ultrasound or high pressures and/or increased temperature, the materials of the filter medium and of the sheathing will join particularly well.
- The sheathing can be, for example, in the form of a V-shaped or U-shaped profile wherein the end sections are then inserted into the space between the legs of the U or V and subsequent compression is carried out. In this way, the edges that may have the tendency to fray are completely enclosed by the sheathing.
- For example, the sheathing is formed of a flat filter medium with at least one longitudinal fold. Between the first and second fold legs of the sheathing, the end sections are provided. The longitudinal folding is realized, for example, parallel to an edge of the corresponding sheathing strip.
- Alternatively, a filter element has a first and a second end section of a flat filter medium. The first end section has a fold with two fold legs and the end section of the second end section is positioned between the fold legs and is compressed therewith.
- A filter element has accordingly a flat filter material with at least two end sections wherein the two end sections are fixed on each other and no open terminal edges is existing since either the sheathing encloses both terminal edges or one of the end sections encloses the terminal edge of the other end section. In this connection, the end sections may originate from a single, for example, folded, filter material sheet or also several sheets or leaves of filter material may be connected to each other. The filter medium can have several layers wherein, for example, between the layers an absorbent material such as active carbon particles may be filled in. For example, filter media are used that between two layers have active carbon particles that absorb dirt or odor. In particular in case of multi-layer filter media, by means of sheathing or enclosure of the terminal edge of at least one of the end sections it is achieved that the layers will not fray or that introduced particles between the layers cannot flow out of the filter element.
- The end section in the alternative embodiment can also have several folds with the same fold orientation. The section can form, for example, a U-shaped or V-shaped profile into which the edge of the second end section is inserted.
- Usually, the filter element is formed of a filter medium that is folded multiple times in a zigzag shape. The zigzag folding increases the surface area of the filter element through which the fluid to be filtered flows, for example, air or fuel.
- In order to improve the connection between the end sections, the end sections, the sheathing and/or the fold legs can be glued in addition. It is also conceivable that the end sections, the sheathing and/or the fold legs are compressed with each other with profiling. By embossment of a profile or a structure during compression, an improved connection for non-woven filter media results.
- Finally, a filter device is proposed that has a corresponding filter element and embodies as operating medium filter, for example, a fuel filter or an air or passenger compartment filter for a motor vehicle.
- In a method for producing a filter element it is provided: connecting a first end section of a flat filter medium with a second end section of a flat filter medium wherein the terminal edges of the end sections are enclosed by a sheathing. The sheathing is moreover compressed together with the end sections.
- In a variant of the manufacturing process for a filter element it is provided: connecting a first with a second end section of a flat filter medium. In this connection, the first end section is provided with a fold with two fold legs and the second end section is compressed between the fold legs with the latter. Compression or connection of the end sections with the sheathing or the fold legs can be realized, for example, by ultrasound, fusing or laser welding.
- Further possible implementations of the invention comprise also combinations that are not explicitly mentioned of features or embodied variants that are disclosed supra or in the following with respect to embodiments. In this connection, a person of skill in the art will also add individual aspects as improvements or supplements to the respective basic form of the invention.
- Further embodiments of the invention are the subject matter of the dependent claims as well as of the embodiments of the invention disclosed in the following. In the following, the invention will be explained in more detail with the aid of embodiments with reference to the attached figures.
- The accompanying Figures, where like reference numerals refer to identical or functionally similar elements throughout the separate views and which together with the detailed description below are incorporated in and form part of the specification, serve to further illustrate various embodiments and to explain various principles and advantages all in accordance with the present invention.
- Features of the present invention, which are believed to be novel, are set forth in the drawings and more particularly in the appended claims. The invention, together with the further objects and advantages thereof, may be best understood with reference to the following description, taken in conjunction with the accompanying drawings. The drawings show a form of the invention that is presently preferred; however, the invention is not limited to the precise arrangement shown in the drawings.
-
FIG. 1 is a schematic perspective illustration of a first embodiment of a filter element; -
FIG. 2 is a schematic a perspective illustration of a second embodiment of a filter element; -
FIGS. 3-5 are detailed illustrations of end sections of the filter medium connected to each other; -
FIGS. 6 , 7 are schematic illustrations for explaining variants of the manufacturing process for filter elements; -
FIG. 8 is a schematic section illustration of an alternative embodiment of end sections of the filter medium connected to each other; -
FIG. 9 is a schematic illustration of an embodiment of a filter device; and -
FIGS. 10A and 10B are schematic illustrations for explaining a further variant of the manufacturing process for filter elements. - In the Figures, same, or functionally the same, elements inasmuch as nothing else is indicated, are identified with the same reference characters.
- Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.
- Before describing in detail embodiments that are in accordance with the present invention, it should be observed that the embodiments reside primarily in combinations of apparatus components and methods related to a filter element as well as means and methods of securing edges of filter media together. Accordingly, the apparatus components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.
- In this document, relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element preceded by “comprises . . . a” does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.
-
FIG. 1 shows a first embodiment of a filter element. In this connection, thefilter element 1 is formed of a sheet of flat filter medium such as a nonwoven filter material. First, rectangular nonwoven filter material sheets are shaped such that end sections of thesheet 3 are resting on each other. InFIG. 1 an endless filter bellows 2 is formed thereby wherein theend sections 3 are secured by a sheathing 4. Thefilter element 1 can for example be inserted in a filter device in a filter cup such that the fluid to be filtered, for example, fuel, oil or also air, must pass through the filter medium and is purified thereby. -
FIG. 2 shows a perspective illustration of a second embodiment wherein afilter element 10 is formed of a zigzag-folded nonwoven filter material. The zigzag-shaped filter material is formed to abellows 2 in that end sections orterminal fold sections 3 are connected to each other. By the zigzag-shaped folding a larger surface area of the filter material in thefilter element 10 results. The connection of theend sections 3 of the flat filter material is illustrated in the following Figures in more detail. - In
FIG. 3 , a detail of a filter element is shown that illustrates two connected end sections of the filter material sheet. A firstfilter material sheet 2A and a secondfilter material sheet 2B are illustrated. The end sections are identified byreference characters edge 9 of the respectivefilter material sheet 2A. 2B. Since inFIG. 3 and also in the following Figures only a detail of the area of theend sections filter material sheets FIG. 1 or 2. - The two
end sections FIG. 3 a U-shaped profile. The U-shaped profile results from thedual folding 5A, 5B of a strip of filter material. Between the fold legs theend sections -
FIG. 4 shows an alternative embodiment with twofilter material sheets FIG. 3 , has a V-shaped profile. Theend sections flat filter medium fold legs longitudinal fold 5 of the sheathing. The twoterminal edges 9 of theend sections fold edge 5 of the sheathing 4. - A further variant for the connection of two end sections of flat filter materials is illustrated in
FIG. 5 . A firstfilter material sheet 2A and a secondfilter material sheet 2B are illustrated. As already indicated, they can also be oppositely positioned end sections of a single filter material sheet. Theend section 3A of the firstfilter material sheet 2A, at the bottom inFIG. 5 , is provided with afold 5. Theend section 3A can also be understood as being provided with a V-shaped profile. In this way, by thefold 5, parallel to theterminal edge 9 of theend section 3A, twofold legs fold legs end section 3B of the secondfilter material sheet 2B is inserted. - The three layers, i.e., the upper
first fold leg 6A, theend section 3B of the secondfilter material sheet 2B, and thelower fold leg 6B of thefirst end section 3A are compressed with each other or joined. - In all of the examples illustrated in
FIGS. 3-5 there is no open terminal edge of the filter material. In this way, a particularly reliable fluid-tight sealing action results, in particular, when the filter material sheets are of a multi-layer configuration. - In
FIG. 6 , a manufacturing process for corresponding filter elements in which end sections are connected to each other is schematically explained. InFIG. 6 , two zigzag-foldedfilter media terminal edges 9 abut thecentral leg 24 of the sheathing 4. However, a spacing between theterminal edges 9 and the facing side of thecentral leg 24 of the sheathing 4 may exist. - Finally, the layers of the sheathing are compressed with the terminal (fold) sections. For this purpose, for example a
sonotrode 12 and ananvil 11 are pressed together. The sonotrode generates ultrasound that is matched, for example, to the material to be connected in order to achieve a particularly reliable connection of the material layers with each other. - In
FIG. 7 , a manufacturing process for producing a connection as illustrated inFIG. 5 is illustrated. Two zigzag-foldedfilter materials filter material sheet 2A is provided with afold 5 and comprises thus two foldlegs fold edge 5. Theterminal edge 9 of the second end section of the secondfilter material sheet 2B is inserted between thefold legs anvil 11 and asonotrode 12. In this connection, both elements (anvil and sonotrode) can be pressed against each other or only one of them, for example, only the sonotrode is designed to be movable. -
FIG. 8 shows a section illustration of an alternative embodiment for end sections connected to each other of a filter medium. In this connection, multi-layer filter media are illustrated.FIG. 8 shows only the end sections connected to each other in cross-section. - In this context, the
filter media layers layers active carbon particles 19 are strewn that serve as an absorber. The sheathing is formed of a simple strip of nonwoven material but can also be a plastic profile that is provided with threeparallel folds 5A, 5B, and 5C with the same orientation. The sheathing comprises therefore fold legs or foldsections folds 5A, 5B, 5C and theedges 23. -
FIG. 8 shows that theterminal edge 9 of thefilter medium active carbon particles 19 cannot fall out. -
FIG. 9 shows a filter device, for example, as a fuel filter, that is embodied with an afore describedfilter element 10. The filter device or thefuel filter 13 compromises a folded bellows 2 that is formed of zigzag-folded filter material and is secured between twocovers filter element 10 in which twoend sections 3 are joined by compression with each other. In this connection, in particular the connecting possibilities as illustrated inFIG. 3-5 or 8 can be used. - The
upper cover 15 is provided with aconnector 16 that has anopening 18. The fluid to be filtered can enter for example in the direction ofarrow 17 into the interior of the folded bellows 2 and can flow out by passing through the folds of the filter material. Of course, further filter devices are conceivable. For example, the filter element can be inserted into a filter cup or an angular bellows can be formed. - Finally,
FIG. 10 shows a further variant of a connection of two filter material end sections or method steps for producing the same.FIG. 10A shows similar toFIGS. 6 and 7 zigzag-foldedfilter materials end section 3A of the first filter material is folded twice in the same orientation, as indicated by thereference characters 5A and 5B and encloses theend section 3B of the secondfilter material sheet 2B. - Sonotrode 12 and
anvil 11 are provided with a profiling, for example, knurling. This means that upon compression of theend sections - In
FIG. 10B the result of the two end sections orfilter sheets end sections - The proposed measures for connecting the end sections or the manufacturing processes of filter elements and filter devices leads to a particular seal-tightness of these bellows seam connection or the connection of the end sections. Moreover, an improved visual appearance results because no further auxiliary means such as clamps or adhesives must be used. Moreover, no additional material is required for the manufacture so that the processing can be realized in a particularly cost-efficient way. Because of the use of nonwoven filter material as a sheathing, as it is used for example in the filter material sheets, the disposal of corresponding filter elements is possible also in a particularly simple and inexpensive way. As filter materials in particular thermoplastic nonwoven materials are used that can be easily deformed and compressed.
- In the foregoing specification, specific embodiments of the present invention have been described. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the present invention. The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims. The invention is defined solely by the appended claims including any amendments made during the pendency of this application and all equivalents of those claims as issued.
Claims (13)
1. A filter element comprising:
a first end section (3A) at a first edge of a filter medium sheet;
a second section (3B) at a second edge of a filter medium sheet;
wherein said first end section (3A) has a fold (5) forming two facing fold legs (6A, 6B) in the first end section (3A);
wherein said second end section (3B) overlays upon said first end section (3A);
wherein said two fold legs (6A, 6B) are arranged upon opposing sides of said second end section;
wherein said two fold legs (6A, 6B) compress said second end section (3B) between said fold legs, securing said end sections together.
2. The filter element according to claim 1 , wherein
said first end section (3A) includes a plurality of folds (5A, 5B), said plurality of folds sharing a common fold orientation direction, said plurality of folds arranged between said two fold legs.
3. The filter element according to claim 2 , wherein
said filter medium sheet includes a plurality spaced folds forming a zigzag folded filter medium, the spaced folds sharing a common fold direction with the fold forming the fold legs.
4. The filter element according to claim 1 , wherein
said first and second end sections are arranged on opposite edges of a single filter material sheet on opposing lateral sheet edges and are compressively secured together forming a circumferentially closed endless filter bellows (2).
5. The filter element according to claim 1 , wherein
said end sections (3A, 3B) or the fold legs (6A, 6B) are moreover connected by gluing.
6. The filter element according to claim 1 , wherein
said end sections (3A, 3B) or the fold legs (6A, 6B) are moreover compressed with each other with profiling.
7. The filter element according to claim 1 , wherein
said filter medium sheet comprises a plurality of overlaid layers (7, 8).
8. The filter element according to claim 1 , wherein
said filter medium sheet comprises a non-woven filter material.
9. The filter element according to claim 8 , wherein
said filter medium sheet comprises a non-woven filter material;
wherein the filter medium sheet is a weldable material suitable for ultrasonic welding or laser welding;
wherein said weldable material is any of: a meltable material or a material with a meltable coating.
10. A method of producing a filter element, comprising:
providing a sheet of filter medium having
a first end section (3A) at a first edge of a filter medium sheet; and
a second section (3B) at a second edge of a filter medium sheet;
forming a fold in the sheet of filter medium, the fold having a fold line spaced inwardly on to sheet from the first ends and in the first end section,
the fold forming two fold legs (6A, 6B) in the first end section (3A);
overlaying the first end section of said filter medium sheet onto an against the second end section of said filter medium sheet;
folding the two fold legs onto and against opposing sides of said second end section such that the second end section is arranged between the two fold legs;
securing a first end section of said filter medium onto the second end section of said filter medium, wherein the securing step is practiced by
compressing said fold legs together against opposing sides of the second end section, said compressing securing said first end section onto said second end section.
11. The method of producing a filter element according to claim 10 , wherein
in said providing step, said sheet of filter medium is a weldable material suitable for ultrasonic welding or laser welding;
wherein said weldable material is any of: a meltable material or a material with a meltable coating;
wherein in said securing step , said end sections or said fold legs are secured together by ultrasonic welding or laser welding.
12. The method of producing a filter element according to claim 10 , wherein
said filter medium sheet is provided with a plurality spaced folds forming a zigzag folded filter medium;
wherein the spaced folds have fold lines sharing a common fold orientation direction with the fold forming the two legs.
13. The method of producing a filter element according to claim 11 , wherein
said end sections or said fold legs are secured together by a compression embossment providing a multiple fold embossment into said end sections or said fold legs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/312,775 US20140305088A1 (en) | 2009-10-21 | 2014-06-24 | Filter Element, Filter Device and Method for Producing a Filter Element |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009050257.2 | 2009-10-21 | ||
DE102009050257A DE102009050257A1 (en) | 2009-10-21 | 2009-10-21 | Filter element, filter device and method for producing a filter element |
PCT/EP2010/064977 WO2011047963A1 (en) | 2009-10-21 | 2010-10-07 | Filter element, filter device and method for producing a filter element |
US13/452,455 US8757394B2 (en) | 2009-10-21 | 2012-04-20 | Filter element, filter device and method for producing a filter element |
US14/312,775 US20140305088A1 (en) | 2009-10-21 | 2014-06-24 | Filter Element, Filter Device and Method for Producing a Filter Element |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/452,455 Division US8757394B2 (en) | 2009-10-21 | 2012-04-20 | Filter element, filter device and method for producing a filter element |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140305088A1 true US20140305088A1 (en) | 2014-10-16 |
Family
ID=43466459
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/452,455 Expired - Fee Related US8757394B2 (en) | 2009-10-21 | 2012-04-20 | Filter element, filter device and method for producing a filter element |
US14/312,775 Abandoned US20140305088A1 (en) | 2009-10-21 | 2014-06-24 | Filter Element, Filter Device and Method for Producing a Filter Element |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/452,455 Expired - Fee Related US8757394B2 (en) | 2009-10-21 | 2012-04-20 | Filter element, filter device and method for producing a filter element |
Country Status (4)
Country | Link |
---|---|
US (2) | US8757394B2 (en) |
CN (1) | CN203108302U (en) |
DE (2) | DE102009050257A1 (en) |
WO (1) | WO2011047963A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009052123A1 (en) * | 2009-11-05 | 2011-05-12 | Mann + Hummel Gmbh | Filter element, filter device and method for producing a filter element |
DE102012013470A1 (en) * | 2012-07-09 | 2014-05-08 | Mann + Hummel Gmbh | Method and device for manufacturing filter elements and filter element |
DE102013015645A1 (en) * | 2013-09-23 | 2015-03-26 | Mann + Hummel Gmbh | Device and method for producing a filter bellows |
CN107052559B (en) * | 2017-06-07 | 2022-12-27 | 张家港市彰阳工业过滤器有限公司 | Double-layer corrugated filter cloth and welding positioning device, welding device and welding method thereof |
GB201812152D0 (en) * | 2018-07-25 | 2018-09-05 | Bw Tech Limited | A method of constructing a tubular water filter |
CN114175223A (en) * | 2019-07-25 | 2022-03-11 | 日立能源瑞士股份公司 | Power semiconductor module and method for forming power semiconductor module |
TWI699233B (en) * | 2019-09-12 | 2020-07-21 | 濾能股份有限公司 | A cylindric filter device, a manufacturing method and an usage of the same, and a filter system having the same |
CN115008756A (en) * | 2022-06-09 | 2022-09-06 | 贺德克液压技术(上海)有限公司 | Optimized longitudinal processing technology of filter material |
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IT1091453B (en) * | 1977-11-10 | 1985-07-06 | Whitehad Motofides Spa | OIL BATH AIR FILTER |
JP3492429B2 (en) * | 1994-10-11 | 2004-02-03 | 山信工業株式会社 | Filter element |
US5873920A (en) * | 1996-09-27 | 1999-02-23 | Dana Corporation | Low restriction, high performance air filter |
DE19933163A1 (en) | 1999-07-20 | 2001-02-08 | Hydac Filtertechnik Gmbh | Filter element with welding connection clip and device for producing the same |
DE10135421A1 (en) * | 2001-07-20 | 2003-02-13 | Hydac Filtertechnik Gmbh | Method for producing a connection point for a filter element and device for producing the same |
-
2009
- 2009-10-21 DE DE102009050257A patent/DE102009050257A1/en not_active Withdrawn
-
2010
- 2010-10-07 DE DE112010005044.9T patent/DE112010005044B4/en active Active
- 2010-10-07 CN CN2010900012714U patent/CN203108302U/en not_active Expired - Lifetime
- 2010-10-07 WO PCT/EP2010/064977 patent/WO2011047963A1/en active Application Filing
-
2012
- 2012-04-20 US US13/452,455 patent/US8757394B2/en not_active Expired - Fee Related
-
2014
- 2014-06-24 US US14/312,775 patent/US20140305088A1/en not_active Abandoned
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US2749265A (en) * | 1953-11-05 | 1956-06-05 | Bendix Aviat Corp | Method of making pleated paper filter elements |
US3306794A (en) * | 1963-02-12 | 1967-02-28 | Wix Corp | Method of making a filter element |
US4588464A (en) * | 1983-09-09 | 1986-05-13 | Kurashiki Boseki Kabushiki Kaisha | Method of producing a fluorocarbon filter element |
US4663041A (en) * | 1983-09-09 | 1987-05-05 | Kurashiki Baseki Kabushiki Kaisha | Fluorocarbon filter element |
US5114508A (en) * | 1984-12-24 | 1992-05-19 | Tokuya Miyagi | Filter element and its production |
US20010018952A1 (en) * | 1999-02-04 | 2001-09-06 | Midmac Systems | Filter forming and joining apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE112010005044A5 (en) | 2012-11-29 |
CN203108302U (en) | 2013-08-07 |
WO2011047963A1 (en) | 2011-04-28 |
DE112010005044B4 (en) | 2023-08-10 |
DE102009050257A1 (en) | 2011-05-12 |
US8757394B2 (en) | 2014-06-24 |
US20120248026A1 (en) | 2012-10-04 |
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