EP1007186A2 - Filter element, in particular for filtering liquids - Google Patents

Filter element, in particular for filtering liquids

Info

Publication number
EP1007186A2
EP1007186A2 EP98943849A EP98943849A EP1007186A2 EP 1007186 A2 EP1007186 A2 EP 1007186A2 EP 98943849 A EP98943849 A EP 98943849A EP 98943849 A EP98943849 A EP 98943849A EP 1007186 A2 EP1007186 A2 EP 1007186A2
Authority
EP
European Patent Office
Prior art keywords
filter
fleece
filter element
web
element according
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.)
Withdrawn
Application number
EP98943849A
Other languages
German (de)
French (fr)
Inventor
Nikolaus Moser
Helmut Storz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP1007186A2 publication Critical patent/EP1007186A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—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
    • 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
    • B01D29/11—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
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2041—Metallic material the material being filamentary or fibrous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/34—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements by the filter structure, e.g. honeycomb, mesh or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters
    • B01D2201/127—Pleated filters with means for keeping the spacing between the pleats

Definitions

  • Filter element especially for liquid filtering
  • the invention relates to a filter element, in particular for filtering liquids, and a method for its production according to the preamble of claim 1.
  • a filter element is known, for example, from DE 94 03 868.6 U1 with a zigzag-folded filter web, in which the filter web is folded in a star shape. The resulting hollow cylinder is flowed radially from the outside by the liquid to be filtered and the filtered liquid is led out of the filter element centrally.
  • the material of the filter web is paper, felt or a plastic fleece, these filter elements being inserted as a replaceable insert in a corresponding filter housing. After a certain operating time, these filter elements with the known filter material no longer have sufficient filter properties and must be replaced.
  • the invention has for its object to develop a filter element of the type mentioned in such a way that a long life of the filter element can be achieved with a simple structure retained.
  • the filter element according to the invention is advantageous, in particular for use as a liquid filter in a motor vehicle, with the features of the characterizing part of claim 1 in that with a filter fleece which contains metal or glass fiber, an extraordinarily long service life, possibly even corresponding to the service life of the connected unit, is made possible. This also simplifies the construction of the filter housing, since it is no longer necessary to replace the filter element.
  • the filter web is made from pre-embossed filter fleece plates or from a rolled-up filter fleece web and the individual surfaces of the zigzag shape are imprinted on the basis of the embossing Manufacturing process formed.
  • a mechanically stable filter element can be permanently formed, which retains the advantages of the relatively large filter surface even with a star fold, based on the respective installation space, and therefore does not fall back on the multi-layer arrangement, known per se, with various nonwoven materials.
  • filter fleece which consists entirely of metal fibers
  • filter webs of approximately 1 mm thickness can be produced in various pore sizes and fiber thicknesses, in particular made of stainless steel fibers.
  • the use of sintered metal fiber fleece is also advantageous.
  • the metal fiber fleece is particularly suitable for use in the thermally stressed oil filter area, whereby the fibers have sufficient capacity to store the dirt particles over a long service life without becoming brittle.
  • the filter fleece with different metal fiber diameters can be used in a single-layer design for certain filter fleece arrangements in terms of weight and cost.
  • the filter element as a glass fiber fleece, it can advantageously be laminated or coated on one or both sides with polyester fibers.
  • grooving or other embossing can be carried out in a simple manner and the glass fiber fleece can be processed to form a star-fold filter element without additional protective fleece on the upstream or downstream side and, if appropriate, also without supporting fabric.
  • the filter element according to the invention of the embodiments described above can preferably be used in the hydraulic area, in the manual transmission area, in the lubricating oil or fuel filter area of a motor vehicle or also in water filtration or in the filtration of aggressive media. With a suitable fiber thickness, no additional fine filters are generally necessary.
  • Figure 1 is a plan view of a star-shaped filter element
  • Figure 2 Examples of the knockouts on the filter path of the filter element.
  • FIG. 1 shows a filter element 2 which is provided with a star-shaped zigzag-folded filter web 1 and which is used, for example, for filtering lubricating oil in a motor vehicle.
  • the lubricating oil to be filtered is directed from the outside onto the filter web 1 and filtered out through an outlet in the center of the filter element 2.
  • FIG. 1 Individual areas of a filter web 1 made of metal or glass fibers designed according to the invention are shown in FIG.
  • different pre-embossments of the filter web 1 are possible, which are shown by way of example in FIG.
  • knockouts 3, 4 and 5 are provided transversely to the folded edge 6 on each individual surface of the filter web 1.
  • knock-outs are carried out on the folded edge 6 and in the extreme right-hand example, the previously described knock-out types are combined with one another.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)

Abstract

The invention relates to a filter element for filtering liquids having a filter belt (1), made of a filtering nonwoven fabric, which can be folded in a zigzag. The nonwoven fabric contains metal fibers, glass fibers and/or polyester fibers. The filter belt (1) folded in a zigzag is made from pre-embossed plates of a filtering nonwoven fabric, or from a rolled strip of a filtering nonwoven fabric. The individual surfaces of the zigzag shape can be formed by pre-embossing (3, 4, 5,6 ), preferably for star folding.

Description

Filterelement, insbesondere zur Flüssiqkeitsfilterunq Filter element, especially for liquid filtering
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft ein Filterelement, insbesondere zur Flüssigkeitsfilterung, und ein Verfahren zu dessen Herstellung nach dem Oberbegriff des Anspruchs 1.The invention relates to a filter element, in particular for filtering liquids, and a method for its production according to the preamble of claim 1.
Es ist ein Filterelement beispielsweise aus der DE 94 03 868.6 U1 mit einer zick-zack-förmig gefalteten Filterbahn bekannt, bei dem die Filterbahn sternförmig zusammengelegt ist. Der dadurch gebildete Hohlzylinder wird radial von außen von der zu filternden Flüssigkeit angeströmt und die gefilterte Flüssigkeit wird zentral aus dem Filterelement herausgeleitet.A filter element is known, for example, from DE 94 03 868.6 U1 with a zigzag-folded filter web, in which the filter web is folded in a star shape. The resulting hollow cylinder is flowed radially from the outside by the liquid to be filtered and the filtered liquid is led out of the filter element centrally.
Das Material der Filterbahn ist bei dem bekannten Filterelement Papier, Filz oder ein Kunststoffvlies, wobei diese Filterelemente als auswechselbarer Einsatz in ein entsprechendes Filtergehäuse eingefügt werden. Nach einer bestimmten Betriebszeit weisen diese Filterelemente mit dem bekannten Filtermaterial keine ausreichende Filtereigenschaft mehr auf und müssen ersetzt werden.In the known filter element, the material of the filter web is paper, felt or a plastic fleece, these filter elements being inserted as a replaceable insert in a corresponding filter housing. After a certain operating time, these filter elements with the known filter material no longer have sufficient filter properties and must be replaced.
AufgabenstellungTask
Der Erfindung liegt die Aufgabe zugrunde, ein Filterelement der eingangs genannten Art so fortzubilden, dass bei einem beibehaltenem einfach Aufbau eine große Lebensdauer des Filterelements erreicht werden kann.The invention has for its object to develop a filter element of the type mentioned in such a way that a long life of the filter element can be achieved with a simple structure retained.
BESTATIGUNGSKOPIE Vorteile der ErfindungCONFIRMATION COPY Advantages of the invention
Das erfindungsgemäße Filterelement ist, insbesondere für die Anwendung als Flüssigkeitsfilter in einem Kraftfahrzeug, mit den Merkmalen des Kennzeichens des Anspruchs 1 dadurch vorteilhaft, dass mit einem Filtervlies, das Metalloder Glasfaser enthält, eine außerordentlich große Lebensdauer, gegebenenfalls sogar entsprechend der Lebensdauer des angeschlossenen Aggregats, ermöglicht wird. Hierdurch wird auch die Konstruktion des Filtergehäuses vereinfacht, da eine Auswechslung des Filterelements nicht mehr notwendig ist.The filter element according to the invention is advantageous, in particular for use as a liquid filter in a motor vehicle, with the features of the characterizing part of claim 1 in that with a filter fleece which contains metal or glass fiber, an extraordinarily long service life, possibly even corresponding to the service life of the connected unit, is made possible. This also simplifies the construction of the filter housing, since it is no longer necessary to replace the filter element.
Um nach wie vor einen Aufbau des Filterelements, vorzugsweise sternförmig mit Zick-Zack-Falten, in vorteilhafter Weise zu ermöglichen, ist die Filterbahn aus vorgeprägten Filtervliesplatten oder aus einer aufgerollten Filtervliesbahn hergestellt und anhand der Vorprägung werden die Einzelflächen der Zick- Zack-Form im Herstellungsprozess herausgebildet. Somit kann dauerhaft ein mechanisch stabiles Filterelement gebildet werden, das die Vorteile der relativ großen Filteroberfläche auch bei einer Sternfaltung, bezogen auf den jeweiligen Bauraum, beibehält und damit nicht auf die, für sich gesehen bekannte Mehrlagenanordnung mit diversen Vliesmaterialien zurückgegriffen wird.In order to continue to enable the filter element to be constructed, preferably in a star shape with zigzag folds, the filter web is made from pre-embossed filter fleece plates or from a rolled-up filter fleece web and the individual surfaces of the zigzag shape are imprinted on the basis of the embossing Manufacturing process formed. Thus, a mechanically stable filter element can be permanently formed, which retains the advantages of the relatively large filter surface even with a star fold, based on the respective installation space, and therefore does not fall back on the multi-layer arrangement, known per se, with various nonwoven materials.
Mit einer vorteilhaften Ausführungsform des Filtervlieses, das vollständig aus Metallfasern besteht, können Filterbahnen von ca. 1 mm Dicke in verschiedenen Porenfeinheiten und Faserdicken, insbesondere aus Edelstahlfasern, hergestellt werden. Auch eine Verwendung von gesintertem Metallfaservlies ist vorteilhaft. Das Metallfaservlies eignet sich besonders zum Einsatz im thermisch beanspruchten Ölfilterbereich, wobei die Fasern eine ausreichende Kapazität aufweisen um die Schmutzpartikel über eine lange Lebensdauer zu speichern ohne zu verspröden.With an advantageous embodiment of the filter fleece, which consists entirely of metal fibers, filter webs of approximately 1 mm thickness can be produced in various pore sizes and fiber thicknesses, in particular made of stainless steel fibers. The use of sintered metal fiber fleece is also advantageous. The metal fiber fleece is particularly suitable for use in the thermally stressed oil filter area, whereby the fibers have sufficient capacity to store the dirt particles over a long service life without becoming brittle.
In einer Mischform kann gemäß einer weiteren Ausführungsform das Filtervlies mit unterschiedlichen Metallfaserdurchmessern in einlagiger Ausführung für bestimmte Filtervliesanordnungen gewichts- und preisgünstiger eingesetzt werden. Bei einer anderen bevorzugten Ausführungsform des Filterelements als Glasfaservlies kann dieses in vorteilhafter Weise ein- oder beidseitig mit Polyesterfasern kaschiert bzw. beschichtet werden. Hierdurch ist eine Rillierung oder sonstige Prägung auf einfache Weise durchführbar und das Glasfaservlies kann ohne zusätzliches Schutzvlies auf der An- oder der Abströmseite und gegebenenfalls auch ohne Stützgewebe zu einem Sternfalt-Filterelement verarbeitet werden.In a mixed form, according to a further embodiment, the filter fleece with different metal fiber diameters can be used in a single-layer design for certain filter fleece arrangements in terms of weight and cost. In another preferred embodiment of the filter element as a glass fiber fleece, it can advantageously be laminated or coated on one or both sides with polyester fibers. As a result, grooving or other embossing can be carried out in a simple manner and the glass fiber fleece can be processed to form a star-fold filter element without additional protective fleece on the upstream or downstream side and, if appropriate, also without supporting fabric.
Eine gute Stabilität der Stern- bzw. Zick-Zack-Faltung ist auf einfache Weise erreichbar, wenn die Vorprägung aus quer zur Faltkante verlaufenden Rillungen oder sonstigen Prägearten jeweils innerhalb einer Einzelfläche der Filterbahn besteht. Die Vorprägungen können jeweils auch entlang der gewünschten Faltkanten für eine einfache mechanische Verarbeitung des Rohmaterials der Filterbahn vorgesehen werden.Good stability of the star or zigzag fold can be achieved in a simple manner if the pre-embossing consists of grooves or other types of embossing running transversely to the folded edge within a single area of the filter web. The knockouts can also be provided along the desired folded edges for simple mechanical processing of the raw material of the filter web.
Das erfindungsgemäße Filterelement der oben beschriebenen Ausführungsformen kann bevorzugt im Hydraulikbereich, im Schaltgetriebebereich, im Schmieröl- oder Kraftstofffilterbereich eines Kraftfahrzeuges oder auch bei der Wasserfiltration oder bei der Filtrierung von aggressiven Medien eingesetzt werden. Es sind in der Regel bei einer geeigneten Faserdicke keine zusätzlichen Feinfilter notwendig.The filter element according to the invention of the embodiments described above can preferably be used in the hydraulic area, in the manual transmission area, in the lubricating oil or fuel filter area of a motor vehicle or also in water filtration or in the filtration of aggressive media. With a suitable fiber thickness, no additional fine filters are generally necessary.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. ZeichnungThese and further features of preferred developments of the invention are evident from the claims and also from the description and the drawings, the individual features being implemented individually or in groups in the form of subcombinations in the embodiment of the invention and in other fields, and can represent advantageous and protectable versions for which protection is claimed here. drawing
Ausführungsbeispiele des erfindungsgemäßen Filterelements werden anhand der Zeichnung erläutert. Es zeigen:Exemplary embodiments of the filter element according to the invention are explained with reference to the drawing. Show it:
Figur 1 eine Draufsicht auf ein sternförmig gefaltetes Filterelement undFigure 1 is a plan view of a star-shaped filter element and
Figur 2 Beispiele für die Vorprägungen auf der Filterbahn des Filterelements.Figure 2 Examples of the knockouts on the filter path of the filter element.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In Figur 1 ist ein mit einer sternförmig zick-zack-gefalteten Filterbahn 1 versehenes Filterelement 2 gezeigt, welches beispielsweise für die Filterung von Schmieröl in einem Kraftfahrzeug eingesetzt wird. Das zu filternde Schmieröl wird dabei von außen auf die Filterbahn 1 geleitet und gelangt gefiltert durch einen Auslass im Zentrum des Filterelements 2 wieder hinaus.FIG. 1 shows a filter element 2 which is provided with a star-shaped zigzag-folded filter web 1 and which is used, for example, for filtering lubricating oil in a motor vehicle. The lubricating oil to be filtered is directed from the outside onto the filter web 1 and filtered out through an outlet in the center of the filter element 2.
Einzelne Flächen einer erfindungsgemäß ausgebildeten Filterbahn 1 aus Metall- oder Glasfasern sind in Figur 2 dargestellt. Um die in der Beschreibungseinleitung erwähnte Stabilität der Filterbahn 1 und die leichte Verarbeitbarkeit zur Bildung von vorzugsweise sternförmigen Zick-Zack-Faltungen zu erreichen, sind unterschiedliche Vorprägungen der Filterbahn 1 möglich, die in der Figur 2 beispielhaft gezeigt sind.Individual areas of a filter web 1 made of metal or glass fibers designed according to the invention are shown in FIG. In order to achieve the stability of the filter web 1 mentioned in the introduction to the description and the easy processability to form preferably star-shaped zigzag folds, different pre-embossments of the filter web 1 are possible, which are shown by way of example in FIG.
Bei den beiden links dargestellten Ausführungsbeispielen in der Figur 2 sind Vorprägungen 3, 4 und 5 quer zur Faltkante 6 auf jeder Einzelfläche der Filterbahn 1 vorgesehen. Bei den rechten Ausführungsbeispielen sind Vorprägungen auf der Faltkante 6 ausgeführt und im äußerst rechten Beispiel sind die vorher beschriebenen Vorprägungsarten miteinander kombiniert. BezuqszeichenlisteIn the two exemplary embodiments shown on the left in FIG. 2, knockouts 3, 4 and 5 are provided transversely to the folded edge 6 on each individual surface of the filter web 1. In the right-hand exemplary embodiments, knock-outs are carried out on the folded edge 6 and in the extreme right-hand example, the previously described knock-out types are combined with one another. Reference list
FilterbahnFilter track
Filterelement ,4,5= VorprägungenFilter element, 4.5 = knockouts
Faltkante Folded edge

Claims

Patentansprücheclaims
1 ) Filterelement zur Flüssigkeitsfilterung mit1) Filter element for liquid filtering with
- einer zick-zack-förmig faltbaren Filterbahn (1) aus einem Filtervlies, dadurch gekennzeichnet, dass- A zigzag foldable filter web (1) made of a filter fleece, characterized in that
- das Filtervlies Metall- und/oder Glasfaser enthält und dass die zick-zack-förmig gefaltete Filterbahn (1 ) aus vorgeprägten Filtervliesplatten oder aus einer vorgeprägten aufgerollten Filtervliesbahn hergestellt ist, wobei anhand der Vorprägung (3,4,5,6) die Einzelflächen der Zick-Zack-Form herausbildbar sind.- The filter fleece contains metal and / or glass fiber and that the zigzag-shaped folded filter web (1) is made from pre-embossed filter fleece plates or from a pre-embossed rolled-up filter fleece web, the individual surfaces being based on the pre-embossing (3,4,5,6) the zigzag shape can be formed.
2) Filterelement nach Anspruch 1 , , dadurch gekennzeichnet, dass2) Filter element according to claim 1, characterized in that
- das Filtervlies vollständig aus Metallfasern besteht.- The filter fleece consists entirely of metal fibers.
3) Filterelement nach Anspruch 2, dadurch gekennzeichnet, dass3) Filter element according to claim 2, characterized in that
- das Metallfiltervlies gesintert ist.- The metal filter fleece is sintered.
4) Filterelement nach Anspruch 1 , dadurch gekennzeichnet, dass4) Filter element according to claim 1, characterized in that
- das Metallfiltervlies aus Fasern mit jeweils unterschiedlichen Durchmessern besteht und einlagig hergestellt ist.- The metal filter fleece consists of fibers with different diameters and is made in one layer.
5) Filterelement nach Anspruch 1 , dadurch gekennzeichnet, dass5) Filter element according to claim 1, characterized in that
- das Filtervlies aus Mikrofasem besteht und ein- oder beidseitig mit Polyesterfasern beschichtet ist. 6) Filterelement nach Anspruch 5, dadurch gekennzeichnet, dass- The filter fleece consists of microfibers and is coated on one or both sides with polyester fibers. 6) Filter element according to claim 5, characterized in that
- das Filtervlies zusätzlich einen vorgegebenen Anteil Polyesterfasern enthält.- The filter fleece additionally contains a predetermined proportion of polyester fibers.
7) Filterelement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass7) Filter element according to one of the preceding claims, characterized in that
- die Vorprägung (3,4,5) aus quer zur Faltkante (6) verlaufenden Rillungen oder sonstigen Prägearten jeweils innerhalb einer Einzelfläche der Filterbahn (1 ) besteht.- The embossing (3, 4, 5) consists of creases or other types of embossing running transversely to the folded edge (6), each within an individual surface of the filter web (1).
8) Filterelement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass8) Filter element according to one of the preceding claims, characterized in that
- die Vorprägung jeweils entlang der Faltkanten (6) vorgesehen ist.- The knockout is provided along the folded edges (6).
9) Verfahren zur Herstellung eines Filterelement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass9) Method for producing a filter element according to one of the preceding claims, characterized in that
- in einem ersten Verfahrensschritt das Filtervlies als Filtervliesbahn (1) oder Filtervliesplatte hergestellt wird,in a first process step, the filter fleece is produced as a filter fleece web (1) or filter fleece plate,
- in einem zweiten Verfahrensschritt die Filtervliesbahn (1 ) oder die Filtervliesplatte mit einer Vorprägung (3,4,5,6) versehen wird und- In a second process step, the filter fleece web (1) or the filter fleece plate is provided with an embossing (3,4,5,6) and
- in einem dritten Verfahrensschritt eine Zick-Zack-Faltung der Filtervliesbahn (1 ) oder der Filtervliesplatte vorgenommen wird.- In a third process step, a zigzag folding of the filter fleece web (1) or the filter fleece plate is carried out.
10) Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass10) Method according to claim 9, characterized in that
- nach der Zick-Zack-Faltung ein Filterstern gebildet wird. - After the zigzag folding, a filter star is formed.
EP98943849A 1997-08-19 1998-08-05 Filter element, in particular for filtering liquids Withdrawn EP1007186A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19735993A DE19735993A1 (en) 1997-08-19 1997-08-19 Long-life filter element for e.g. hot oil, fuel and water
DE19735993 1997-08-19
PCT/EP1998/004884 WO1999008771A2 (en) 1997-08-19 1998-08-05 Filter element, in particular for filtering liquids

Publications (1)

Publication Number Publication Date
EP1007186A2 true EP1007186A2 (en) 2000-06-14

Family

ID=7839463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98943849A Withdrawn EP1007186A2 (en) 1997-08-19 1998-08-05 Filter element, in particular for filtering liquids

Country Status (4)

Country Link
EP (1) EP1007186A2 (en)
DE (1) DE19735993A1 (en)
WO (1) WO1999008771A2 (en)
ZA (1) ZA987505B (en)

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WO1999008771A3 (en) 1999-05-14
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ZA987505B (en) 1999-05-17

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