DE3037019A1 - FLOATING FILTER INSERT FROM FOLDED FLOATING FILTER MATERIAL FOR FLOATING FILTER AND A METHOD FOR THE PRODUCTION THEREOF - Google Patents
FLOATING FILTER INSERT FROM FOLDED FLOATING FILTER MATERIAL FOR FLOATING FILTER AND A METHOD FOR THE PRODUCTION THEREOFInfo
- Publication number
- DE3037019A1 DE3037019A1 DE19803037019 DE3037019A DE3037019A1 DE 3037019 A1 DE3037019 A1 DE 3037019A1 DE 19803037019 DE19803037019 DE 19803037019 DE 3037019 A DE3037019 A DE 3037019A DE 3037019 A1 DE3037019 A1 DE 3037019A1
- Authority
- DE
- Germany
- Prior art keywords
- particulate filter
- upper edges
- filter paper
- folded
- longitudinal beads
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000011324 bead Substances 0.000 claims description 23
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
-
- 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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
-
- 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
Description
zu seiner Herstellungfor its manufacture
Die Erfindung betrifft einen Schwebstoffiltereinsatz, entsprechend dem Gattungsbegriff des Anspruches 1 und das Verfahren zu seiner Herstellung.The invention relates to a particulate filter insert, accordingly the generic term of claim 1 and the method for its production.
Die hochwertigen, der Abscheidung von Schwebstoffen aus einem Luft- oder Gasstrom dienenden Schwebstoffilter sind aus Zellul.ose-Asbest- oder aus Glasfaserpapieren hergestellt. Diese Papiere sind sehr weich und damit sehr empfindlich gegen Beanspruchungen mechanischer Art oder durch die Strömung hervorgerufen. Die Unterbringung der großen Filterpapierflächen auf einem möglichst kleinen Raum wird durch eine zick-zack-förmige Faltung· erreicht. Der für die Strömung des Luft- bzw. Gasstromes notwendige gleichmäßige Abstand der Faltenflächen wird durch Abstandshalter erreicht. Die Abstandshalter sollen dabei gleichzeitig mechanische Belastungen vom Filterpapier fernhalten.The high quality, made of the separation of suspended matter a particulate filter used for air or gas flow are made of cellulose asbestos or fiberglass papers manufactured. These papers are very soft and therefore very sensitive to stresses of a mechanical nature or caused by the current. The accommodation of the large areas of filter paper on as small a surface as possible Space is achieved through a zigzag fold. The uniform distance between the fold surfaces necessary for the flow of the air or gas flow is provided by spacers achieved. The spacers should simultaneously place mechanical loads on the filter paper keep away.
Ein bekannter Filtereinsatz, insbesondere für Gasfilter, enthält als Filtermaterial einen der Länge nach zickzack-förmig gefalteten Filterpapierstreifen. Die Falten des die Filterfläche bildenden Papierstreifens liegen dabei in parallelen Abständen zueinander. Um diesenA known filter insert, in particular for gas filters, contains a zigzag-shaped filter material as the filter material folded filter paper strips. The wrinkles of the paper strip forming the filter surface at a distance that is parallel to each other. To this one
t v 4 ■:. t v 4 ■ :.
Abstand und um auch bei Strömungsbelastung den Flächenabstand zu halten, verlaufen Längswülste, bestehend aus Streifen bzw. Strichen einer Klebmasse, in einigen Zentimetern Abstand zueinander gradlinig und rechtwinklig zur Richtung der Falten über die Filterfläche.Als Klebstoff kann jeder nach dem Auftragen erstarrende Kleber verwendet werden. Bei der Herstellung eines Filtereinsatzes wird der Filterpapierstreifen zunächst vorgefaltet und dann von neuem ausgebreitet, um auf seiner Flache die Klebstoffwülste aufzubringen. Nach dem Auftragen der Langswülste wird die Faltung des Filterpapierstreifens in den ursprünglichen Faltlinien wiederhergestellt,und die Falten werden auf das erforderliche Abstandsmaß zusammengedrückt. Dieser Vorgang wird ausgeführt, bevor die Klebmasse völlig erstarrt ist.Distance and by the surface distance even with flow loads to keep, run longitudinal beads, consisting of strips or lines of an adhesive, in a few centimeters Distance to each other straight and at right angles to the direction of the folds over the filter surface. As an adhesive Any adhesive that solidifies after application can be used. When manufacturing a filter insert the filter paper strip is first pre-folded and then spread out again to cover the surface Apply beads of adhesive. After applying the long beads the folding of the filter paper strip is restored in the original folding lines, and the folds are compressed to the required distance. This process is carried out before the adhesive is completely has frozen.
Nachteilig ist das Zusammendrücken des gesamten Faltenpaketes auf seine gewünschte Länge. Es ist damit keinesfalls sichergestellt, daß der Abstand der einzelnen Faltenflächen, wie es aus strömungstechnischen Gründen heraus notwendig ist, und auch der Abstand der Falten gleich groß ist. Es dürfte außerdem wohl kaum zu erreichen sein, das Zusammendrücken gerade in dem bestimmten Zeitpunkt zu vollziehen, in dem die dann vorhandene Konsistenz der Klebmasse überall so gleichmäßig und richtig ist, daß überhaupt ein kompaktes Faltenpaket entsteht und daß vor allem das empfindliche Filtermaterial dabei nicht durch zu festes Drücken gefährlich beschädigt wird. (DE-PS 11 21 438)The disadvantage is that the entire package of folds is compressed to its desired length. It is by no means ensures that the distance between the individual fold surfaces, as is necessary for fluidic reasons, and the distance between the folds is the same is. In addition, it is unlikely to be possible to perform the compression at the specific point in time in which the then existing consistency of the adhesive is everywhere so uniform and correct that at all a compact package of folds is created and, above all, the sensitive filter material is not affected by too firm Pressing is dangerously damaged. (DE-PS 11 21 438)
Bei einem bekannten Schwebstoff-Filterpack zur Luft- oder Gasreinigung aus zick-zack-förmig gefaltetem Filterpapier sind auf beide Seiten des Filterpapiers durchlaufende, der Fixierung der Falten und der Abstandshalterung·dienendeIn a known suspended matter filter pack for air or Gas cleaning made of zigzag-shaped folded filter paper are continuous on both sides of the filter paper, used to fix the folds and the spacer
ύ - 5 - ύ - 5 -
;;; Wülste oder Schnüre von rechteckigem Querschnitt und;; ; Beads or cords of rectangular cross-section and
'■·■) einer Höhe gleich dem halben Faltenabstand aufgebracht. '■ · ■) applied at a height equal to half the distance between the folds.
Die Wülste bestehen aus haftfähigem Material, wie pasten-The beads consist of adhesive material, such as paste
!'* förmigem, gefüllten Polyvinyl acetatpolymerisat oder härt-! '* shaped, filled polyvinyl acetate polymer or hardened
;' barer Polyesterpaste. Sie werden mittels Düsen auf eine; ' polyester paste. You are using nozzles on a
■? vorgefaltete und wieder gestreckte Papierbahn aufgetra-■ ? pre-folded and re-stretched paper web applied
■·.* gen. Nach erneuter Zusammenfaltung der Papierbahn werden■ ·. * Gen. After folding the paper web again,
Ί die Wülste durch Wärme-, Ultraschall- oder Infrarot-Strah-Ί the beads by heat, ultrasound or infrared radiation
r lung oder durch Polymerisation in den beiderseitigen Fal r development or by polymerisation in the two-sided case
ten des Filterpapiers auf der gesamten Länge der sich ·of the filter paper along the entire length of the
' berührenden Anlageflächen zu steifen Stegen ohne Trennungslinie zusammengeschmolzen und ausgehärtet.Nachteilig istydaß l· bei Filterpacks von größerer Faltenhöhe das Verschmelzen undFused 'in contact with contact surfaces to rigid webs without separation line and ausgehärtet.Nachteilig istydaß l · at filter packs of greater fold height fusing and
Aushärten auf Schwierigkeiten stößt, weil das EinbringenHardening encounters difficulties because introducing
*' der nötigen Energie von außen her schwer beherrschbar ist.* 'the necessary energy is difficult to control from the outside.
?; Es werden aufwendige Spezialeinrichtungen benötigt. Während? ; Complex special equipment is required. While
|; des Verschmelzens bieten die Wülste darüber hinaus keinen|; beyond that, the beads do not offer any merging
£ Halt der Falten und damit auch Faltenflächen zueinander.£ Hold the folds and thus also fold surfaces to each other.
I Daher muß das Filterpack in der Länge abgestützt werden.The length of the filter pack must therefore be supported.
v. Trotzdem ist keine Gewähr für einen bestimmten und überallv. Nevertheless there is no guarantee for a specific and everywhere
|: gleichen Faltenabstand gegeben. (DE-AS 21 38 41?)| : given the same distance between the folds. (DE-AS 21 38 41?)
Aufgabe der Erfindung ist ein Schwebstoffiltereinsatz aus gefaltetem Schwebstoffiltermaterial mit AbstandshalternThe object of the invention is a particulate filter insert from folded particulate filter material with spacers
'■■■■ für die Faltenflächen und die Falten, die einfach aufzu- '■■■■ for the fold areas and the folds that are easy to
.; bringen sind, den Faltenabstand sichern, die Filtermaterial.; are to be brought, secure the pleat distance, the filter material
flächen möglichst wenig abdecken und ein Verfahren zu sei-cover as little areas as possible and a process to be
: ner Herstellung.: ner production.
Die Lösung der Aufgabe erfolgt gemäß den Kennzeichen derThe task is solved according to the characteristics of the
■■ " Ansprüche 1 bis 4 wobei die Ansprüche 3 und 4 Verfahren zur■■ "Claims 1 to 4 wherein claims 3 and 4 process for
Herstellung des Schwebstoffiltereinsatzes beschreiben.Describe the manufacture of the particulate filter insert.
ORIGINAL INSPECTEDORIGINAL INSPECTED
Der entscheidende Vorteil dieser Erfindung liegt in der einfachen Art und Weise, mit der der Schwebstoffiltereinsatz nicht nur sicher, sondern ohne große Investitionen mit komplizierten Einrichtungen auch wirtschaftlich herstellbar ist. Die aufgespritzten Kunststoffwülste als Abstandshalter aus dem zähelastischen Material gestatten ein sicheres Wiederfalten,ohne das empfindliche Schwebstoff iltermaterial zu schädigen. Die verklebten Oberkanten der Abstandshalter lassen einen hantierbaren Schwebstof filtereinsatz entstehen. Die feste Konsistenz der Abstandshalter vor dem Wiederfalten mit einer angelösten oder mit einem Kleber versehenen Oberkante garantieren gleiche Faltenflächen- und Faltenabstände.The key advantage of this invention lies in the simple manner in which the particulate filter insert Not only safe, but also economically producible without large investments with complicated facilities is. Allow the sprayed-on plastic beads as spacers made of the viscoplastic material safe refolding without damaging the sensitive suspended matter filter material. The glued upper edges the spacers create a manageable suspended matter filter insert. The solid consistency of the Spacer with a loosened one before refolding or the upper edge provided with an adhesive guarantee the same pleat surface and pleat spacing.
Das Verfahren zur Herstellung eines Schwebstoffiltereinsatzes ist in der Zeichnung dargestellt und wird im folgenden beschrieben. Es zeigenThe process for manufacturing a particulate filter insert is shown in the drawing and is described below. Show it
Fig. 1 das flache Schwebstoffiltermaterial mit den Abstandswülsten,Fig. 1 with the flat particulate filter material the spacer beads,
Fig. 2 den gefalteten Schwebstoffiltereinsatz im Schnitt.Fig. 2 shows the folded particulate filter insert in Cut.
Das von der Faltmaschine vorgefaltete Schwebstoffiltermaterial 1 wird wieder ausgebreitet. Die Faltkanten 2 haben einen Abstand 3 voneinander, der die Faltenhöhe bestimmt. Farbige Markierungsstriche 4 am Ende jeder zweiten Faltkante 2 dienen zur Steuerung der Vorrichtung. Von den Markierungsstrichen 4 gesteuert werden durch Düsen Längswülste 5 von vorbestimmter Länge 6 symmetrisch zu den Faltkanten 2 aufgespritzt. Ihre Länge 6 ergibt sich aus der jeweiligen Faltenhöhe 7. Sie stellt zusammen mit dem Abstand 8 der längsparallelen Längswülste 5 sicher, daß im fertigen Schwebstoffiltereinsatz die Abstände (11) der Faltenflächen 9 und die Faltenabstände 14 gesichert sind. Der Abstand 8 beträgt vorzugsweise 30 mm.The particulate filter material pre-folded by the folding machine 1 is spread out again. The folding edges 2 have a distance 3 from one another, which determines the height of the folds. Colored marking lines 4 at the end of every second folding edge 2 are used to control the device. From the marking lines 4 are controlled by Nozzles longitudinal beads 5 of predetermined length 6 symmetrical sprayed onto the fold edges 2. Their length 6 results from the respective fold height 7. It puts together with the distance 8 of the longitudinally parallel longitudinal beads 5 ensure that the distances in the finished HEPA filter insert (11) of the fold surfaces 9 and the fold spacings 14 secured are. The distance 8 is preferably 30 mm.
Die Höhe 10 der Längswülste 5 entspricht dem halben Abstand 11 der Faltenflächen 9 im Schwebstoffiltereinsatz. Während des Aushärtvorganges der Längswülste 5 wird das Schwebstoffiltermaterial 1 plan gehalten. Die Längswülste 5 aus PVC-, ABS- und ähnlichen Pasten härten zähelastisch aus. Vor dem Wiederzusammenfalten des Schwebstof filtermaterials 1 zum Schwebstoffiltereinsatz werden die Oberkanten 12 der Längswülste 5 durch ein mit Rollen aufgebrachtes Lösungsmittel leicht angelöst und die Falten dann sofort zusammengefahren. Sie werden dabei bis auf Anschlag und unter leichtem Druck gegeneinander gepreßt, bis die gegeneinanderliegenden Längswülste 5 der jeweiligen Nachbarfalten miteinander verklebt sind.The height 10 of the longitudinal beads 5 corresponds to half the distance 11 between the fold surfaces 9 in the particulate filter insert. During the hardening process of the longitudinal beads 5, the suspended matter filter material 1 is kept flat. The longitudinal bulges 5 made of PVC, ABS and similar pastes harden viscoplastically. Before folding up the suspended matter again filter material 1 can be used as a particulate filter insert the upper edges 12 of the longitudinal beads 5 slightly loosened by a solvent applied with rollers and the folds then immediately startled. They are pressed against each other up to the stop and under slight pressure, until the opposing longitudinal beads 5 of the respective neighboring folds are glued together.
LeerseiteBlank page
Claims (4)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3037019A DE3037019C2 (en) | 1980-10-01 | 1980-10-01 | HEPA filter insert made of folded HEPA filter material for HEPA filters and a process for its manufacture |
SE8103780A SE447207B (en) | 1980-10-01 | 1981-06-16 | FILTER INSERT AND SET FOR ITS MANUFACTURING |
CH4316/81A CH653913A5 (en) | 1980-10-01 | 1981-06-30 | Suspended-matter filter insert made of folded suspended-matter filter material for suspended-matter filter and a method of producing it |
FR8118562A FR2490970B1 (en) | 1980-10-01 | 1981-09-25 | FILTERING LINER FOR SUSPENSION MATERIAL FILTERS AND METHOD FOR THE PRODUCTION THEREOF |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3037019A DE3037019C2 (en) | 1980-10-01 | 1980-10-01 | HEPA filter insert made of folded HEPA filter material for HEPA filters and a process for its manufacture |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3037019A1 true DE3037019A1 (en) | 1982-06-24 |
DE3037019C2 DE3037019C2 (en) | 1986-01-09 |
Family
ID=6113308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3037019A Expired DE3037019C2 (en) | 1980-10-01 | 1980-10-01 | HEPA filter insert made of folded HEPA filter material for HEPA filters and a process for its manufacture |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH653913A5 (en) |
DE (1) | DE3037019C2 (en) |
FR (1) | FR2490970B1 (en) |
SE (1) | SE447207B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4038966A1 (en) * | 1990-12-06 | 1992-06-11 | Hengst Walter Gmbh & Co Kg | Filter element - comprises folded filter medium incorporating thermoplastic spacers |
US5804014A (en) * | 1993-12-30 | 1998-09-08 | Detroit Holding Limited | Process for providing a filter insert |
EP0867216A1 (en) * | 1997-03-29 | 1998-09-30 | VORWERK & CO. INTERHOLDING GmbH | Filter element comprising a flexible filter element material pleated in zig-zag fashion and process for its production |
US5868889A (en) * | 1993-12-30 | 1999-02-09 | "Jacobi" Systemtechnik Gmbh | Process for manufacturing a fluid filter |
US5888262A (en) * | 1993-12-30 | 1999-03-30 | "Jacobi" Systemtechnik Gmbh | Filter insert and process for producing it |
DE19755466A1 (en) * | 1997-12-03 | 1999-06-10 | Jacobi Systemtechnik Gmbh | Glue application for continuous filter element manufacture |
DE10107634A1 (en) * | 2001-02-15 | 2002-08-22 | Mhb Filtration Gmbh & Co Kg | Filter element formed of pleated filter medium, e.g. for motor vehicle fresh air supply, is formed from pleated filter medium with adhesive tracks or reinforcing members which are arranged to enable bending of filter element |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0341451A1 (en) * | 1988-05-09 | 1989-11-15 | Siemens Aktiengesellschaft | Filter device for waste gas stream at the gas phase deposition in semiconductor technic |
US5084178A (en) * | 1988-06-15 | 1992-01-28 | Pall Corporation | Corrugated filter arrangement with support layer and flow channels |
EP0347188B1 (en) * | 1988-06-15 | 1994-04-20 | Pall Corporation | A filter arrangement |
US5252207A (en) * | 1988-06-15 | 1993-10-12 | Pall Corporation | Wrap member having openings |
US5236480A (en) * | 1989-01-05 | 1993-08-17 | Camfil Ab | Air filter for workstations and methods of making and using such air filter |
EP0377420B1 (en) * | 1989-01-05 | 1994-11-02 | Camfil Ab | Air filter |
EP0377419B1 (en) * | 1989-01-05 | 1993-12-22 | Camfil Ab | Filter |
SE512385C2 (en) * | 1998-03-25 | 2000-03-06 | Camfil Ab | Air filter of pleated filter material and methods for its manufacture |
US6165241A (en) * | 1999-03-27 | 2000-12-26 | Aaf International, Inc. | Pleated filter media with strip spacers and method of making |
US6699348B2 (en) | 2001-04-13 | 2004-03-02 | Camfil Ab | Method for filter fabrication |
DE102009040202B4 (en) * | 2009-09-07 | 2015-10-01 | Mann + Hummel Gmbh | filter |
DE102014009886A1 (en) | 2014-07-04 | 2016-01-07 | Mann + Hummel Gmbh | Filter element for filtering media |
EP3077078A1 (en) * | 2013-12-05 | 2016-10-12 | Mann+Hummel GmbH | Filter element with filter bellows |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121438B (en) * | 1955-01-21 | 1962-01-04 | Armand Jacques Julien Poelman | Filter insert made of a length of zigzag folded filter paper strips |
DE2718217A1 (en) * | 1977-04-23 | 1978-11-02 | Draegerwerk Ag | Zigzag paper suspension filter element - with spacing cords of greater thickness on upstream than downstream side |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1562037A (en) * | 1968-01-17 | 1969-04-04 | ||
GB1277588A (en) * | 1968-12-13 | 1972-06-14 | Marshall D A G | Improvements in or relating to the manufacture of pleated filtering material |
DE2138412C3 (en) * | 1971-07-28 | 1982-12-30 | Delbag-Luftfilter Gmbh, 1000 Berlin | HEPA filter pack for gas cleaning made from zigzag folded filter paper |
AT331813B (en) * | 1971-11-09 | 1976-08-25 | Marquet & Cie Noel | FILTER AND METHOD FOR ITS MANUFACTURING |
IT1119517B (en) * | 1979-11-28 | 1986-03-10 | Gilardini Spa | PROCEDURE TO CREATE AIR FILTERS SYSTEM FOR THE REALIZATION OF SUCH PROCEDURE AND RELATED FILTERS OBTAINED |
-
1980
- 1980-10-01 DE DE3037019A patent/DE3037019C2/en not_active Expired
-
1981
- 1981-06-16 SE SE8103780A patent/SE447207B/en not_active IP Right Cessation
- 1981-06-30 CH CH4316/81A patent/CH653913A5/en not_active IP Right Cessation
- 1981-09-25 FR FR8118562A patent/FR2490970B1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121438B (en) * | 1955-01-21 | 1962-01-04 | Armand Jacques Julien Poelman | Filter insert made of a length of zigzag folded filter paper strips |
DE2718217A1 (en) * | 1977-04-23 | 1978-11-02 | Draegerwerk Ag | Zigzag paper suspension filter element - with spacing cords of greater thickness on upstream than downstream side |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4038966A1 (en) * | 1990-12-06 | 1992-06-11 | Hengst Walter Gmbh & Co Kg | Filter element - comprises folded filter medium incorporating thermoplastic spacers |
US5804014A (en) * | 1993-12-30 | 1998-09-08 | Detroit Holding Limited | Process for providing a filter insert |
US5868889A (en) * | 1993-12-30 | 1999-02-09 | "Jacobi" Systemtechnik Gmbh | Process for manufacturing a fluid filter |
US5888262A (en) * | 1993-12-30 | 1999-03-30 | "Jacobi" Systemtechnik Gmbh | Filter insert and process for producing it |
EP0867216A1 (en) * | 1997-03-29 | 1998-09-30 | VORWERK & CO. INTERHOLDING GmbH | Filter element comprising a flexible filter element material pleated in zig-zag fashion and process for its production |
DE19755466A1 (en) * | 1997-12-03 | 1999-06-10 | Jacobi Systemtechnik Gmbh | Glue application for continuous filter element manufacture |
DE10107634A1 (en) * | 2001-02-15 | 2002-08-22 | Mhb Filtration Gmbh & Co Kg | Filter element formed of pleated filter medium, e.g. for motor vehicle fresh air supply, is formed from pleated filter medium with adhesive tracks or reinforcing members which are arranged to enable bending of filter element |
Also Published As
Publication number | Publication date |
---|---|
FR2490970A1 (en) | 1982-04-02 |
SE8103780L (en) | 1982-04-02 |
SE447207B (en) | 1986-11-03 |
DE3037019C2 (en) | 1986-01-09 |
FR2490970B1 (en) | 1988-04-29 |
CH653913A5 (en) | 1986-01-31 |
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