EP2044874B1 - Filter bag for a vacuum cleaner - Google Patents

Filter bag for a vacuum cleaner Download PDF

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Publication number
EP2044874B1
EP2044874B1 EP20080013146 EP08013146A EP2044874B1 EP 2044874 B1 EP2044874 B1 EP 2044874B1 EP 20080013146 EP20080013146 EP 20080013146 EP 08013146 A EP08013146 A EP 08013146A EP 2044874 B1 EP2044874 B1 EP 2044874B1
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EP
European Patent Office
Prior art keywords
bag
sealing membrane
connection port
bag wall
filter bag
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Application number
EP20080013146
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German (de)
French (fr)
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EP2044874A2 (en
EP2044874A3 (en
Inventor
Andrej Korobov
Herbert Krehan
Jürgen Scheiderer
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Branofilter GmbH
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Branofilter GmbH
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Publication of EP2044874A2 publication Critical patent/EP2044874A2/en
Publication of EP2044874A3 publication Critical patent/EP2044874A3/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1436—Connecting plates, e.g. collars, end closures

Definitions

  • the invention relates to a filter bag for vacuum cleaner with a bag wall containing a inlet opening made of air-permeable filter material, a arranged in the region of the inlet opening outside the filter bag retaining plate having an aligned with the inlet port opening, and an elastic sealing membrane, a in the radial direction in the connection opening protruding, a sealing opening surrounding the connection opening sealing ring surrounds, on whose inner side facing the bag inside a support ring is applied.
  • Vacuum cleaners use filter bags to collect the accumulated dust.
  • a suction flow is generated by means of a blower, which pulls the dust into a suction hose or the like and from there through the connection opening of the holding plate and the inlet opening of the bag wall promotes into the filter bag.
  • the dust contained in the intake air is retained in the filter bag.
  • the dust-free air flow penetrates the wall of the filter bag and is then blown into the environment.
  • the holding plate which is associated with a device-side receptacle.
  • a device-side connecting piece may be present on the retaining plate, so that the sealing ring in the axial direction bends inwards and applies sealingly against the outer peripheral surface of the connecting piece.
  • the holding plate is not attached to the nozzle but held with its sealing ring against the end face of the nozzle or other device-side sealing surface.
  • the sealing ring should be a backup ring deposited.
  • the holding plate 2 stacked cardboard layers, of which the bag interior facing cardboard layer is bent at the location of the connection opening circumferentially outwardly, so that a sealing ring acting on support ring is formed.
  • the present invention seeks to provide a filter bag of the type mentioned, which has the simplest possible structure and can be produced inexpensively.
  • the sealing membrane disposed between the bag wall and the holding plate and is welded to the bag wall and the holding plate around the connection opening around, that the inlet opening has a smaller diameter than the connection opening and the support ring of the diameter
  • the sealing membrane consists of soft material, which is cured without foam in the welded to the bag wall and the holding plate area and thinner than the starting thickness of the sealing membrane and in the sealing ring forming area exhibiting at least the Bag wall facing away from the sealing ring outside thickened by the connection opening to the outside substantially to the initial thickness.
  • the retaining plate, the sealing membrane and the bag wall are made of suitable material so that they can be welded together.
  • the welding can be carried out without any special effort.
  • the foam material of the sealing ring is displaced inwardly into the connection opening of the retaining plate, so that the foam material forming there anyway and forming the sealing ring is thickened and exposed to the outside. This is supported by the support ring formed by the bag wall, which bears against the inside of the sealing ring so that the foam material is held outwards.
  • the production is very simple, so that the production costs are accordingly relatively low.
  • the sealing ring can seal against the end face of a device-side nozzle or against another sealing surface. Furthermore, the foam sealing ring can also bend inwards, if you want to attach the plate to a device-side connection piece.
  • the sealing membrane may have at least on its outer side a cover skin covering the soft foam material. This can favor the sealing against the end face of a device-side nozzle or another sealing surface.
  • the inlet opening expediently has a larger diameter than the sealing opening. To this Way remains the radially inner region of the sealing ring unsupported, which makes the sealing ring, so to speak, compliant.
  • a filter bag for vacuum cleaners has a bag wall of air-permeable filter material, of which a bag wall 1 contains an inlet opening 2.
  • a holding plate. 3 arranged, which serves for fixing the dust filter bag in a vacuum cleaner, which for this purpose has a suitable receptacle.
  • the holding plate 3 contains a connection opening 4 aligned with the inlet opening 2.
  • an elastic sealing membrane 5 is present, which forms a radial direction in the connection opening 4 projecting sealing ring 6, which encloses a connection opening 4 coaxial sealing opening 7.
  • a device-side connecting piece 8 is arranged in the field of device-side recording.
  • the holding plate 3 can be plugged with its connection opening 4 on the connecting piece 8 or with the bag interior facing away from the outside 9 of the sealing ring 6 against the nozzle end face 10 to the system.
  • another device-side sealing surface may be present, on which the sealing ring 6 may rest.
  • the filter bag is plugged with its retaining plate 3 on the device nozzle 8 or brought with its sealing ring 6 for abutment against a device-side sealing surface, for example, the end face 10, depends on the respective device type.
  • the connection piece 8 is drawn at a distance from the holding plate 3.
  • the sealing ring 6 bends towards the bag interior and seals the connecting piece 8 at its outer periphery.
  • the inlet opening 2 of the bag wall 1 has a smaller diameter than the connection opening 4 of the holding plate 3.
  • the support ring 12 is formed by the smaller in diameter with respect to the connection opening 4 ring portion 13 of the bag wall 1.
  • the inlet opening 2 and the seal opening 7 may in principle have a same diameter. Conveniently, however, the diameter of the inlet opening 2 is greater than the diameter of the seal opening 7, so that radially inwardly results in a free from the support ring 12 sealing ring portion 14.
  • the filter material forming the bag wall 1 is or contains a thermoplastic fiber material.
  • the bag wall 1 may have a single-layered or multi-layered construction.
  • the different layers can fulfill different functions.
  • the inner layer facing the bag interior 11 may be a coarse filter
  • the next layer may be a fine filter
  • the outer layer may be a support layer serving for strength.
  • Multi-ply filter bag walls are known in great variety, so that their structure will not be discussed in detail here.
  • the sealing membrane 5 is arranged between the bag wall 1 and the holding plate 3 and welded on the one hand to the bag wall 1 and on the other hand with the holding plate 3 around the connection opening 4 around.
  • the holding plate 3 made of a suitable plastic material.
  • the circular encircling and, so to speak, a weld forming weld region 15 is from the Figures 2 and 3 seen. The understanding of the FIG. 2 Because of it is pointed out that in the welding area 15 in the circumferential direction sequentially drawn rectangles during welding plasticized and then cured areas of the bag wall 1 and the sealing membrane 5 are.
  • the welding is advantageously carried out by ultrasonic welding.
  • the sealing membrane 5 is made of flexible foam material, for example, polyurethane, polyethylene, polyvinyl chloride or EPDM rubber.
  • the soft foam material may be open-cell and / or closed-cell. It has elastic properties, so that the sealing membrane 5 and in particular the sealing ring 6 formed by it are subjected to elastic changes in shape and therefore can cling well to the device-side sealing surface 10 or plugged connection piece 8 on the outer circumference.
  • the starting thickness 16 of the sealing membrane 5, which has the sealing membrane in the new state and also in its use state in the edge region 17 lying radially outside the welding region 15, lies in the range between 1 mm and 10 mm, advantageously between 3 mm and 5 mm.
  • the foam material forming the sealing membrane 5 has lost its foam structure in the region 15 welded to the bag wall 1 and the holding plate 3 and is substantially thinner than the starting thickness 16 due to the pressure application accompanying the welding operation.
  • the welding region 15 extends to the the connection opening 4 bounding peripheral edge 18 of the holding plate 3.
  • Radially inside the peripheral edge 18, the outside 9 of the sealing membrane 5 is no longer covered by the holding plate 3, so that the sealing ring outside 9 is exposed.
  • the sealing ring 6 can therefore expand radially within the peripheral edge 18 in the direction of its thickness and thereby thicken substantially to its initial thickness 16, as seen from FIG. 3 is apparent. This thickening corresponds, so to speak, a spreading of the sealing ring 6 in the direction of thickness.
  • This and in particular the spreading of the sealing ring 6 axially inwardly opposite support ring 12 result in the already described issuing the sealing ring 6 to the outside.
  • the sealing membrane 5 and the holding plate 3 is used together with a pressing from the inside against the bag wall 1 sonotrode to which a relatively small dome is attached, the support ring 12 resulting ring section 13 of the bag wall 1 and the sealing ring portion 14 of the sealing membrane 5 presses during welding to the outside.
  • the foam sealing membrane 5, as shown FIG. 4 it can be seen, in the embodiment, a rectangular or square peripheral shape.
  • the illustrated holding plate 3 still has a guide device for a only in FIG. 3 dash-dotted lines indicated slide 20, which between one the connection opening 4 releasing open position and the connection opening 4 closing closed position in the direction of arrow 21 is arranged to be movable.
  • the closure slide 20 is located on the side opposite the bag wall 1 side of the holding plate 3. It has a passage opening, which is in the initial position forming the open position at the connection opening 4. If one pulls the closure slide 20 in the direction according to arrow 21, its passage opening moves away from the connection opening 4. In this case, a closed region of the closure slide 20 passes over the connection opening 4 and closes it.
  • upstanding and the closure slide 20 on both sides of the edge cross-guiding elements 22 may be present on the support plate.
  • the filter bag If the filter bag is full, it is removed from the vacuum cleaner and can be thrown away. In this case, the filter bag is closed during removal by means of the closure slide 20, so that no dust can escape into the environment.
  • the filter bag In the production of the filter bag can be proceeded so that at not the filter bag closed filter material on the described bag wall 1 resulting piece of material pierces the inlet opening 2, after which sets the not yet perforated sealing membrane 5 at the inlet opening 2 on the bag wall 1. Then you welded the filter material, the sealing membrane and the holding plate together. Finally, the seal opening 7 is punched into the sealing membrane 5.
  • the sealing membrane has at least on its outside 9 a cover skin covering the soft foam material.
  • Soft foam body with such a covering skin are well known, so that a more detailed description is unnecessary.
  • the covering skin favors the intended purpose with the sealing ring 6 sealing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Description

Die Erfindung betrifft einen Filterbeutel für Staubsauger mit einer eine Eintrittsöffnung enthaltenden Beutelwand aus luftdurchlässigem Filtermaterial, einer im Bereich der Eintrittsöffnung außen am Filterbeutel angeordneten Halteplatte, die eine mit der Eintrittsöffnung fluchtende Anschlussöffnung aufweist, und einer elastischen Dichtmembran, die einen in radialer Richtung in die Anschlussöffnung vorstehenden, eine zur Anschlussöffnung koaxiale Dichtungsöffnung umschließenden Dichtring bildet, an dessen dem Beutelinneren zugewandten Innenseite ein Stützring anliegt.The invention relates to a filter bag for vacuum cleaner with a bag wall containing a inlet opening made of air-permeable filter material, a arranged in the region of the inlet opening outside the filter bag retaining plate having an aligned with the inlet port opening, and an elastic sealing membrane, a in the radial direction in the connection opening protruding, a sealing opening surrounding the connection opening sealing ring surrounds, on whose inner side facing the bag inside a support ring is applied.

Bei Staubsaugern werden zum Sammeln des anfallenden Staubes Filterbeutel verwendet. Dabei wird mittels eines Gebläses ein Saugstrom erzeugt, der den Staub in einen Saugschlauch oder dergleichen zieht und von dort durch die Anschlussöffnung der Halteplatte und die Eintrittsöffnung der Beutelwand in den Filterbeutel fördert. Der in der angesaugten Luft enthaltene Staub wird im Filterbeutel zurückgehalten. Der vom Staub befreite Luftstrom durchdringt die Wandung des Filterbeutels und wird anschließend in die Umgebung ausgeblasen.Vacuum cleaners use filter bags to collect the accumulated dust. In this case, a suction flow is generated by means of a blower, which pulls the dust into a suction hose or the like and from there through the connection opening of the holding plate and the inlet opening of the bag wall promotes into the filter bag. The dust contained in the intake air is retained in the filter bag. The dust-free air flow penetrates the wall of the filter bag and is then blown into the environment.

Das Festlegen des Filterbeutels im Staubsauger erfolgt mittels der Halteplatte, der eine geräteseitige Aufnahme zugeordnet ist. Dabei kann im Bereich der geräteseitigen Aufnahme ein geräteseitiger Anschlussstutzen vorhanden sein, auf den je nach Gerätetyp die Halteplatte gesteckt wird, so dass sich der Dichtring in axialer Richtung nach innen hin umbiegt und sich dichtend an die Außenumfangsfläche des Anschlussstutzens anlegt. Bei einem anderen Gerätetyp wird die Halteplatte nicht auf den Stutzen aufgesteckt sondern mit ihrem Dichtring gegen die Stirnseite des Stutzens oder eine andere geräteseitige Dichtfläche gehalten. Hierzu sollte der Dichtring einen Stützring hinterlegt sein.The setting of the filter bag in the vacuum cleaner by means of the holding plate, which is associated with a device-side receptacle. In this case, in the area of the device-side receptacle, a device-side connecting piece may be present on the Depending on the device type, the retaining plate is inserted, so that the sealing ring in the axial direction bends inwards and applies sealingly against the outer peripheral surface of the connecting piece. In another type of device, the holding plate is not attached to the nozzle but held with its sealing ring against the end face of the nozzle or other device-side sealing surface. For this purpose, the sealing ring should be a backup ring deposited.

Bei einem aus der EP 0 787 460 A2 bekannten Filterbeutel der eingangs genannten Art weist die Halteplatte 2 übereinander angeordnete Kartonlagen auf, von denen die dem Beutelinneren zugewandte Kartonlage an der Stelle der Anschlussöffnung umlaufend nach außen hin umgebogen ist, so dass ein den Dichtring beaufschlagender Stützring gebildet wird.At one of the EP 0 787 460 A2 known filter bag of the type mentioned, the holding plate 2 stacked cardboard layers, of which the bag interior facing cardboard layer is bent at the location of the connection opening circumferentially outwardly, so that a sealing ring acting on support ring is formed.

Ausgehend hiervon liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Filterbeutel der eingangs genannten Art zu schaffen, der einen möglichst einfachen Aufbau aufweist und kostengünstig hergestellt werden kann.Proceeding from this, the present invention seeks to provide a filter bag of the type mentioned, which has the simplest possible structure and can be produced inexpensively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Dichtmembran zwischen der Beutelwand und der Halteplatte angeordnet und mit der Beutelwand und der Halteplatte um die Anschlussöffnung herum umlaufend verschweißt ist, dass die Eintrittsöffnung einen kleineren Durchmesser als die Anschlussöffnung aufweist und der Stützring von der im Durchmesser mit Bezug auf die Anschlussöffnung kleineren Ringpartie der Beutelwand gebildet wird und dass die Dichtmembran aus Weichstoffmaterial besteht, das im mit der Beutelwand und der Halteplatte verschweißten Bereich schaumstoffstrukturlos ausgehärtet und dünner als die Ausgangsdicke der Dichtmembran ist und sich im den Dichtring bildenden Bereich unter Ausstellen zumindest der der Beutelwand abgewandten Dichtring-Außenseite durch die Anschlussöffnung nach außen im wesentlichen auf die Ausgangsdicke verdickt.This object is achieved in that the sealing membrane disposed between the bag wall and the holding plate and is welded to the bag wall and the holding plate around the connection opening around, that the inlet opening has a smaller diameter than the connection opening and the support ring of the diameter With respect to the connection opening smaller ring portion of the bag wall is formed and that the sealing membrane consists of soft material, which is cured without foam in the welded to the bag wall and the holding plate area and thinner than the starting thickness of the sealing membrane and in the sealing ring forming area exhibiting at least the Bag wall facing away from the sealing ring outside thickened by the connection opening to the outside substantially to the initial thickness.

Die Halteplatte, die Dichtmembran und die Beutelwand bestehen aus geeignetem Material, so dass sie miteinander verschweißbar sind. Das Verschweißen kann ohne besonderen Aufwand durchgeführt werden. Bei dem mit dem Schweißvorgang verbundenen Zusammendrücken der Anordnung wird das Schaumstoffmaterial des Dichtrings sozusagen nach innen hin in die Anschlussöffnung der Halteplatte verdrängt, so dass das dort ohnehin vorhandene und den Dichtring bildende Schaumstoffmaterial verdickt und nach außen hin ausgestellt wird. Dies wird durch den von der Beutelwand gebildeten Stützring unterstützt, der innen am Dichtring anliegt, so dass das Schaumstoffmaterial nach außen hin gehalten wird.The retaining plate, the sealing membrane and the bag wall are made of suitable material so that they can be welded together. The welding can be carried out without any special effort. During the compression of the arrangement associated with the welding process, the foam material of the sealing ring is displaced inwardly into the connection opening of the retaining plate, so that the foam material forming there anyway and forming the sealing ring is thickened and exposed to the outside. This is supported by the support ring formed by the bag wall, which bears against the inside of the sealing ring so that the foam material is held outwards.

Die Herstellung ist denkbar einfach, so dass die Fertigungskosten dementsprechend verhältnismäßig niedrig sind.The production is very simple, so that the production costs are accordingly relatively low.

Da zumindest die Außenseite des Dichtrings nach außen hin ausgestellt ist, kann sich der Dichtring dichtend gegen die Stirnseite eines geräteseitigen Stutzens oder gegen eine andere Dichtfläche legen. Ferner kann sich der Schaumstoff-Dichtring auch nach innen hin umbiegen, falls man die Halteplatte auf einen geräteseitigen Anschlussstutzen aufstecken will.Since at least the outside of the sealing ring is exposed to the outside, the sealing ring can seal against the end face of a device-side nozzle or against another sealing surface. Furthermore, the foam sealing ring can also bend inwards, if you want to attach the plate to a device-side connection piece.

Die Dichtmembran kann mindestens an ihrer Außenseite eine das Weichschaumstoffmaterial überdeckende Abdeckhaut aufweisen. Dies kann das Abdichten gegen die Stirnseite eines geräteseitigen Stutzens oder eine andere Dichtfläche begünstigen.The sealing membrane may have at least on its outer side a cover skin covering the soft foam material. This can favor the sealing against the end face of a device-side nozzle or another sealing surface.

Ferner weist die Eintrittsöffnung zweckmäßigerweise einen größeren Durchmesser als die Dichtungsöffnung auf. Auf diese Weise bleibt der radial innere Bereich des Dichtrings unabgestützt, was den Dichtring sozusagen nachgiebiger macht.Furthermore, the inlet opening expediently has a larger diameter than the sealing opening. To this Way remains the radially inner region of the sealing ring unsupported, which makes the sealing ring, so to speak, compliant.

Für die Ausgangsdicke der Dichtmembran hat sich ein Bereich zwischen 1 mm und 10 mm, zweckmäßigerweise zwischen 3 mm und 5 mm, als vorteilhaft herausgestellt.For the initial thickness of the sealing membrane, a range between 1 mm and 10 mm, advantageously between 3 mm and 5 mm, has proven to be advantageous.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigen:

Figur 1
den die Halteplatte aufweisenden Bereich eines Staubfilterbeutels in schematischer Draufsicht gemäß Pfeil I in Figur 3, wobei ein außerdem vorhandener, an der Halteplatte geführter Verschlussschieber der Übersichtlichkeit wegen weggelassen worden ist,
Figur 2
die Anordnung nach Figur 1 in entgegengesetzter Rückansicht gemäß Pfeil II in Figur 3,
Figur 3
die Anordnung nach Figur 1 in vergrößerter Schnittdarstellung gemäß der Schnittlinie III-III, wobei der Verschlussschieber und ein geräteseitiger Anschlussstutzen strichpunktiert angedeutet sind, und
Figur 4
die Dichtmembran des erfindungsgemäßen Filterbeutels in gesonderter Darstellung im Neuzustand vor der Montage in mit Bezug auf Figur 3 verkleinerter Darstellung.
An embodiment of the invention will be explained with reference to the drawing. Show it:
FIG. 1
the holding plate having region of a dust filter bag in a schematic plan view according to arrow I in FIG. 3 in which an additionally present locking slide guided on the holding plate has been omitted for the sake of clarity,
FIG. 2
the arrangement after FIG. 1 in opposite rear view according to arrow II in FIG. 3 .
FIG. 3
the arrangement after FIG. 1 in an enlarged sectional view along the section line III-III, wherein the closure slide and a device-side connecting piece are indicated by dash-dotted lines, and
FIG. 4
the sealing membrane of the filter bag according to the invention in a separate representation in new condition prior to assembly in relation to FIG. 3 reduced representation.

Ein Filterbeutel für Staubsauger weist eine Beutelwandung aus luftdurchlässigem Filtermaterial auf, von der eine Beutelwand 1 eine Eintrittsöffnung 2 enthält. Im Bereich der Eintrittsöffnung 2 ist außen an der Beutelwand 1 eine Halteplatte 3 angeordnet, die zum Festlegen des Staubfilterbeutels in einem Staubsauger dient, der hierzu eine geeignete Aufnahme aufweist. Die Halteplatte 3 enthält eine mit der Eintrittsöffnung 2 fluchtende Anschlussöffnung 4.A filter bag for vacuum cleaners has a bag wall of air-permeable filter material, of which a bag wall 1 contains an inlet opening 2. In the region of the inlet opening 2 is outside of the bag wall 1, a holding plate. 3 arranged, which serves for fixing the dust filter bag in a vacuum cleaner, which for this purpose has a suitable receptacle. The holding plate 3 contains a connection opening 4 aligned with the inlet opening 2.

Ferner ist eine elastische Dichtmembran 5 vorhanden, die einen in radialer Richtung in die Anschlussöffnung 4 vorstehenden Dichtring 6 bildet, der eine zu Anschlussöffnung 4 koaxiale Dichtungsöffnung 7 umschließt.Furthermore, an elastic sealing membrane 5 is present, which forms a radial direction in the connection opening 4 projecting sealing ring 6, which encloses a connection opening 4 coaxial sealing opening 7.

Im Bereich der geräteseitigen Aufnahme ist üblicherweise ein geräteseitiger Anschlussstutzen 8 angeordnet. Die Halteplatte 3 kann mit ihrer Anschlussöffnung 4 auf den Anschlussstutzen 8 aufgesteckt oder mit der dem Beutelinneren abgewandten Außenseite 9 des Dichtrings 6 gegen die Stutzen-Stirnseite 10 zur Anlage gebracht werden. Anstelle der Stirnseite 10 des Anschlussstutzens 8 kann auch eine andere geräteseitige Dichtfläche vorhanden sein, an der der Dichtring 6 anliegen kann. Ob der Filterbeutel mit seiner Halteplatte 3 auf den Gerätestutzen 8 aufgesteckt oder mit seinem Dichtring 6 zur Anlage an eine geräteseitige Dichtfläche, beispielsweise die Stirnseite 10 gebracht wird, hängt vom jeweiligen Gerätetyp ab. In Figur 3 ist der Anschlussstutzen 8 der Übersichtlichkeit wegen mit Abstand zur Halteplatte 3 gezeichnet.In the field of device-side recording usually a device-side connecting piece 8 is arranged. The holding plate 3 can be plugged with its connection opening 4 on the connecting piece 8 or with the bag interior facing away from the outside 9 of the sealing ring 6 against the nozzle end face 10 to the system. Instead of the end face 10 of the connection piece 8, another device-side sealing surface may be present, on which the sealing ring 6 may rest. Whether the filter bag is plugged with its retaining plate 3 on the device nozzle 8 or brought with its sealing ring 6 for abutment against a device-side sealing surface, for example, the end face 10, depends on the respective device type. In FIG. 3 For reasons of clarity, the connection piece 8 is drawn at a distance from the holding plate 3.

Steckt man die Halteplatte 3 auf den Anschlussstutzen 8, biegt sich der Dichtring 6 zum Beutelinneren hin um und dichtet den Anschlussstutzen 8 an seinem Außenumfang ab.If you put the retaining plate 3 on the connecting piece 8, the sealing ring 6 bends towards the bag interior and seals the connecting piece 8 at its outer periphery.

Für die Anlage des Dichtrings 6 an der Stutzen-Stirnseite 10 ist der Dichtring 6 zumindest mit seiner der Beutelwand 1 abgewandten Dichtring-Außenseite 9 durch die Anschlussöffnung 4 nach außen hin ausgestellt, wie aus Figur 3 ersichtlich ist. Dieses Ausstellen wird mittels eines von der Beutelwand 1 gebildeten Stützrings 12 erreicht, der an der dem Beutelinneren 11 zugewandten Innenseite des Dichtrings 6 anliegt und diesem eine nach außen hin vorstehende Form gibt.For the system of the sealing ring 6 on the nozzle end face 10 of the sealing ring 6 is at least with its side facing away from the bag wall 1 sealing ring outside 9 issued through the connection opening 4 to the outside, as from FIG. 3 is apparent. This issuing is done by means of one of the bag wall 1 Achieved support ring 12 which abuts against the inner side of the bag 6 facing inside the sealing ring 6 and this gives an outwardly projecting shape.

Zur Bildung des Stützringes 12 weist die Eintrittsöffnung 2 der Beutelwand 1 einen kleineren Durchmesser als die Anschlussöffnung 4 der Halteplatte 3 auf. Der Stützring 12 wird von der im Durchmesser mit Bezug auf die Anschlussöffnung 4 kleineren Ringpartie 13 der Beutelwand 1 gebildet.To form the support ring 12, the inlet opening 2 of the bag wall 1 has a smaller diameter than the connection opening 4 of the holding plate 3. The support ring 12 is formed by the smaller in diameter with respect to the connection opening 4 ring portion 13 of the bag wall 1.

Die Eintrittsöffnung 2 und die Dichtungsöffnung 7 können prinzipiell einen gleichen Durchmesser aufweisen. Zweckmäßigerweise ist der Durchmesser der Eintrittsöffnung 2 jedoch größer als der Durchmesser der Dichtungsöffnung 7, so dass sich radial innen ein vom Stützring 12 freier Dichtringbereich 14 ergibt.The inlet opening 2 and the seal opening 7 may in principle have a same diameter. Conveniently, however, the diameter of the inlet opening 2 is greater than the diameter of the seal opening 7, so that radially inwardly results in a free from the support ring 12 sealing ring portion 14.

Das die Beutelwand 1 bildende Filtermaterial ist oder enthält ein thermoplastisches Fasermaterial. Dabei kann die Beutelwand 1 einen einlagigen oder einen mehrlagigen Aufbau aufweisen. Im Falle eines mehrlagigen Aufbaus können die verschiedenen Lagen unterschiedliche Funktionen erfüllen. Beispielsweise kann die dem Beutelinneren 11 zugewandte innere Lage ein Grobfilter, die nächste Lage ein Feinfilter und die Außenlage eine der Festigkeit dienende Stützlage sein. Mehrlagige Filterbeutelwände sind in großer Vielfalt bekannt, so dass auf ihren Aufbau im Einzelnen hier nicht weiter eingegangen wird.The filter material forming the bag wall 1 is or contains a thermoplastic fiber material. In this case, the bag wall 1 may have a single-layered or multi-layered construction. In the case of a multi-layer construction, the different layers can fulfill different functions. For example, the inner layer facing the bag interior 11 may be a coarse filter, the next layer may be a fine filter and the outer layer may be a support layer serving for strength. Multi-ply filter bag walls are known in great variety, so that their structure will not be discussed in detail here.

Die Dichtmembran 5 ist zwischen der Beutelwand 1 und der Halteplatte 3 angeordnet und einerseits mit der Beutelwand 1 und andererseits mit der Halteplatte 3 um die Anschlussöffnung 4 herum umlaufend verschweißt. Hierzu besteht die Halteplatte 3 aus einem geeignetem Kunststoffmaterial. Der kreisförmig umlaufende und sozusagen eine Schweißnaht bildende Schweißbereich 15 ist aus den Figuren 2 und 3 ersichtlich. Des Verständnisses der Figur 2 wegen wird darauf hingewiesen, dass die in dem Schweißbereich 15 in Umfangsrichtung aufeinanderfolgend gezeichneten Rechtecke beim Schweißen plastifizierte und dann ausgehärtete Bereiche der Beutelwand 1 und der Dichtmembran 5 sind.The sealing membrane 5 is arranged between the bag wall 1 and the holding plate 3 and welded on the one hand to the bag wall 1 and on the other hand with the holding plate 3 around the connection opening 4 around. For this purpose, the holding plate 3 made of a suitable plastic material. The circular encircling and, so to speak, a weld forming weld region 15 is from the Figures 2 and 3 seen. The understanding of the FIG. 2 Because of it is pointed out that in the welding area 15 in the circumferential direction sequentially drawn rectangles during welding plasticized and then cured areas of the bag wall 1 and the sealing membrane 5 are.

Das Verschweißen erfolgt zweckmäßigerweise durch Ultraschallschweißen.The welding is advantageously carried out by ultrasonic welding.

Die Dichtmembran 5 besteht aus Weichschaumstoffmaterial beispielsweise aus Polyurethan, Polyäthylen, Polyvinylchlorid oder EPDM-Kautschuk. Das Weichschaumstoffmaterial kann offen-und/oder geschlossenzellig sein. Es weist elastische Eigenschaften auf, so dass die Dichtmembran 5 und dabei insbesondere der von ihr gebildete Dichtring 6 elastischen Formveränderungen unterworfen werden und sich daher gut an die geräteseitige Dichtfläche 10 oder bei eingestecktem Anschlussstutzen 8 an dessen Außenumfang anschmiegen kann.The sealing membrane 5 is made of flexible foam material, for example, polyurethane, polyethylene, polyvinyl chloride or EPDM rubber. The soft foam material may be open-cell and / or closed-cell. It has elastic properties, so that the sealing membrane 5 and in particular the sealing ring 6 formed by it are subjected to elastic changes in shape and therefore can cling well to the device-side sealing surface 10 or plugged connection piece 8 on the outer circumference.

Die Ausgangsdicke 16 der Dichtmembran 5, die die Dichtmembran im Neuzustand und auch in ihrem Gebrauchszustand im radial außerhalb des Schweißbereichs 15 liegenden Randbereich 17 aufweist, liegt im Bereich zwischen 1 mm und 10 mm, zweckmäßigerweise zwischen 3 mm und 5 mm.The starting thickness 16 of the sealing membrane 5, which has the sealing membrane in the new state and also in its use state in the edge region 17 lying radially outside the welding region 15, lies in the range between 1 mm and 10 mm, advantageously between 3 mm and 5 mm.

Das die Dichtmembran 5 bildende Schaumstoffmaterial hat im mit der Beutelwand 1 und der Halteplatte 3 verschweißten Bereich 15 seine Schaumstoffstruktur verloren und ist dort aufgrund der den Schweißvorgang begleitenden Druckanwendung wesentlich dünner als die Ausgangsdicke 16. In radialer Richtung nach innen hin reicht der Schweißbereich 15 bis zur die Anschlussöffnung 4 begrenzenden umlaufenden Kante 18 der Halteplatte 3. Radial innerhalb der umlaufenden Kante 18 ist die Außenseite 9 der Dichtmembran 5 nicht mehr durch die Halteplatte 3 abgedeckt, so dass die Dichtring-Außenseite 9 frei liegt. Der Dichtring 6 kann sich daher radial innerhalb der umlaufenden Kante 18 in Richtung seiner Dicke ausdehnen und sich dabei im wesentlichen auf seine Ausgangsdicke 16 verdikken, wie aus Figur 3 ersichtlich ist. Dieses Verdicken entspricht sozusagen einem Aufspreizen des Dichtrings 6 in Dikkenrichtung. Dies und insbesondere der einem Ausbreiten des Dichtrings 6 nach axial innen hin entgegenstehende Stützring 12 ergeben das bereits geschilderte Ausstellen des Dichtrings 6 nach außen.The foam material forming the sealing membrane 5 has lost its foam structure in the region 15 welded to the bag wall 1 and the holding plate 3 and is substantially thinner than the starting thickness 16 due to the pressure application accompanying the welding operation. In the radial direction inward, the welding region 15 extends to the the connection opening 4 bounding peripheral edge 18 of the holding plate 3. Radially inside the peripheral edge 18, the outside 9 of the sealing membrane 5 is no longer covered by the holding plate 3, so that the sealing ring outside 9 is exposed. The sealing ring 6 can therefore expand radially within the peripheral edge 18 in the direction of its thickness and thereby thicken substantially to its initial thickness 16, as seen from FIG. 3 is apparent. This thickening corresponds, so to speak, a spreading of the sealing ring 6 in the direction of thickness. This and in particular the spreading of the sealing ring 6 axially inwardly opposite support ring 12 result in the already described issuing the sealing ring 6 to the outside.

Zum Ausstellen des Dichtrings 6 nach außen kann ferner beitragen, dass zum Verschweißen der Beutelwand 1, der Dichtmembran 5 und der Halteplatte 3 miteinander eine von innen her gegen die Beutelwand 1 drückende Sonotrode verwendet wird, an der ein verhältnismäßig kleiner Dom angebracht ist, der die den Stützring 12 ergebende Ringpartie 13 der Beutelwand 1 und den Dichtringbereich 14 der Dichtmembran 5 während des Schweißens nach außen drückt.To expose the sealing ring 6 to the outside may further contribute to the welding of the bag wall 1, the sealing membrane 5 and the holding plate 3 is used together with a pressing from the inside against the bag wall 1 sonotrode to which a relatively small dome is attached, the the support ring 12 resulting ring section 13 of the bag wall 1 and the sealing ring portion 14 of the sealing membrane 5 presses during welding to the outside.

Beim Schweißen ergibt sich an der Innenseite der Beutelwand 1 eine der umlaufenden Kante 18 der Halteplatte 3 entsprechend kreisförmige Umfangskante 19, an der nach radial innen hin der Stützring 12 anschließt.When welding results in the inside of the bag wall 1, one of the peripheral edge 18 of the support plate 3 corresponding circular peripheral edge 19, on the radially inward direction of the support ring 12 connects.

Die Schaumstoff-Dichtmembran 5 weist, wie aus Figur 4 ersichtlich ist, beim Ausführungsbeispiels eine rechteckige oder quadratische Umfangsgestalt auf.The foam sealing membrane 5, as shown FIG. 4 it can be seen, in the embodiment, a rectangular or square peripheral shape.

Die dargestellte Halteplatte 3 weist noch eine Führungseinrichtung für einen nur in Figur 3 strichpunktiert angedeuteten Verschlussschieber 20 auf, der zwischen einer die Anschlussöffnung 4 freilassenden Offenstellung und einer die Anschlussöffnung 4 verschließenden Schließstellung in Richtung gemäß Pfeil 21 bewegbar angeordnet ist. Der Verschlussschieber 20 befindet sich an der der Beutelwand 1 entgegengesetzten Seite der Halteplatte 3. Er weist eine Durchgangsöffnung auf, die sich in der die Ausgangsstellung bildenden Offenstellung bei der Anschlussöffnung 4 befindet. Zieht man den Verschlussschieber 20 in Richtung gemäß Pfeil 21, entfernt sich seine Durchgangsöffnung von der Anschlussöffnung 4. Dabei gelangt ein geschlossener Bereich des Verschlussschiebers 20 über die Anschlussöffnung 4 und verschließt diese. Zur Führung des Verschlussschiebers 20 können an der Halteplatte 3 hochstehende und den Verschlussschieber 20 beidseitig am Rand übergreifende Führungselemente 22 vorhanden sein.The illustrated holding plate 3 still has a guide device for a only in FIG. 3 dash-dotted lines indicated slide 20, which between one the connection opening 4 releasing open position and the connection opening 4 closing closed position in the direction of arrow 21 is arranged to be movable. The closure slide 20 is located on the side opposite the bag wall 1 side of the holding plate 3. It has a passage opening, which is in the initial position forming the open position at the connection opening 4. If one pulls the closure slide 20 in the direction according to arrow 21, its passage opening moves away from the connection opening 4. In this case, a closed region of the closure slide 20 passes over the connection opening 4 and closes it. To guide the closure slide 20 3 upstanding and the closure slide 20 on both sides of the edge cross-guiding elements 22 may be present on the support plate.

Ist der Filterbeutel voll, wird er aus dem Staubsauger entnommen und kann weggeworfen werden. Dabei wird der Filterbeutel bei der Entnahme mittels des Verschlussschiebers 20 verschlossen, so dass kein Staub in die Umgebung entweichen kann.If the filter bag is full, it is removed from the vacuum cleaner and can be thrown away. In this case, the filter bag is closed during removal by means of the closure slide 20, so that no dust can escape into the environment.

Derartige Verschlussschieber sind allgemein bekannt.Such shutters are well known.

Bei der Herstellung des Filterbeutels kann so vorgegangen werden, dass man bei noch nicht zum Filterbeutel geschlossenen Filtermaterial an dem die beschriebene Beutelwand 1 ergebenden Materialstück die Eintrittsöffnung 2 einstanzt, wonach man die noch nicht gelochte Dichtmembran 5 bei der Eintrittsöffnung 2 auf die Beutelwand 1 legt. Sodann verschweißt man das Filtermaterial, die Dichtmembran und die Halteplatte miteinander. Schließlich wird noch die Dichtungsöffnung 7 in die Dichtmembran 5 gestanzt.In the production of the filter bag can be proceeded so that at not the filter bag closed filter material on the described bag wall 1 resulting piece of material pierces the inlet opening 2, after which sets the not yet perforated sealing membrane 5 at the inlet opening 2 on the bag wall 1. Then you welded the filter material, the sealing membrane and the holding plate together. Finally, the seal opening 7 is punched into the sealing membrane 5.

Schließlich wird noch auf eine nicht dargestellte zweckmäßige Variante der Dichtmembran hingewiesen, bei der die Dichtmembran mindestens an ihrer Außenseite 9 eine das Weichschaumstoffmaterial überdeckende Abdeckhaut aufweist. Weichschaumstoffkörper mit einer solchen Abdeckhaut sind allgemein bekannt, so dass sich eine weitergehende Beschreibung erübrigt. Die Abdeckhaut begünstigt das mit dem Dichtring 6 bezweckte Abdichten.Finally, attention is drawn to an expedient variant of the sealing membrane, not shown, in which the sealing membrane has at least on its outside 9 a cover skin covering the soft foam material. Soft foam body with such a covering skin are well known, so that a more detailed description is unnecessary. The covering skin favors the intended purpose with the sealing ring 6 sealing.

Claims (4)

  1. Filter bag for vacuum cleaners with a bag wall (1) of air-permeable filter material containing an inlet opening (2), a retaining plate (3) provided on the outside of the filter bag in the area of the inlet opening (2) and with a connection port(4) aligned flush with the inlet opening (2), and an elastic sealing membrane (5) which forms a seal ring (6) protruding radially into the connection port (4) and encompassing a seal opening (7) coaxial to the connection port (4) and having a support ring (12) abutting its inner side which faces the bag interior (10), characterised in that the sealing membrane (5) is provided between the bag wall (1) and the retaining plate (3) and is welded to the bag wall (1) and the retaining plate (3) running around the connection port (4), that the inlet opening (2) has a smaller diameter than the connection port (4) and the support ring (12) is formed by the annular section (13) of the bag wall (1) which has a smaller diameter than the connection port (4), and that the sealing membrane (5) is made of flexible foam material which cures without a foam structure in the area welded to the bag wall (1) and the retaining plate (3) and is thinner than the original thickness (16) of the sealing membrane (5) and becomes thicker towards the outside, substantially to the original thickness (16), in the area forming the seal ring (6), while exposing through the connection port (4) at least the seal ring exterior (9) facing away from the bag wall (1).
  2. Filter bag according to claim 1, characterised in that the sealing membrane has, at least on its exterior, a covering skin which covers the flexible foam material.
  3. Filter bag according to claim 1 or 2, characterised in that the inlet opening (2) has a greater diameter than the seal opening (7).
  4. Filter bag according to any of claims 1 to 3, characterised in that the sealing membrane (5) has an original thickness (16) in the range between 1 mm and 10 mm, expediently between 3 mm and 5 mm.
EP20080013146 2007-10-01 2008-07-22 Filter bag for a vacuum cleaner Active EP2044874B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200720014164 DE202007014164U1 (en) 2007-10-01 2007-10-01 Filter bag for vacuum cleaners

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EP2044874A2 EP2044874A2 (en) 2009-04-08
EP2044874A3 EP2044874A3 (en) 2009-09-30
EP2044874B1 true EP2044874B1 (en) 2010-09-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200390305A1 (en) * 2016-12-23 2020-12-17 Eurofilters Holding N.V. Retainer Panel for a Vacuum Cleaner Bag, with Seal

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Publication number Priority date Publication date Assignee Title
DE102008041234A1 (en) * 2008-08-13 2010-02-25 BSH Bosch und Siemens Hausgeräte GmbH vacuum cleaner housing
DE102010060353A1 (en) * 2010-11-04 2012-05-10 Papierverarbeitung Görlitz GmbH Dust filter bag for vacuum cleaner, has receiving opening formed in bag wall toward air inlet opening, and sealing element made of flexible material, where diameter of receiving opening is smaller than or same as diameter of inlet opening
DK3219376T3 (en) 2016-03-17 2019-01-14 Eurofilters Nv Vacuum cleaner filter bag of recycled plastics
PL3219235T3 (en) 2016-03-17 2022-04-25 Eurofilters Holding N.V. Device for a vacuum cleaner filter bag comprising a holding device and a closure device
EP3219236B1 (en) 2016-03-17 2021-09-01 Eurofilters Holding N.V. Holding plate with improved closure
EP3429451B1 (en) 2016-03-17 2020-02-26 Eurofilters N.V. Vacuum-cleaner filter bag made from recycled plastic
DK3219237T3 (en) 2016-03-17 2018-07-30 Eurofilters Holding Nv Holding plate with improved closure element
DK3357392T3 (en) 2017-02-07 2021-10-11 Eurofilters Holding Nv Holding plate for a vacuum cleaner filter bag with closing device
PL3530171T3 (en) 2018-02-23 2021-10-18 Eurofilters Holding N.V. Holding plate with sealing element
EP3530170B1 (en) 2018-02-23 2020-05-13 Eurofilters Holding N.V. Supporting plate with centring device
ES2937794T3 (en) * 2018-04-27 2023-03-31 Eurofilters Holding Nv Vacuum cleaner filter bag with foil in the area of the clamping plate

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US4861357A (en) * 1988-05-10 1989-08-29 Gavin Thomas W Vacuum cleaner bag collar
DE29601812U1 (en) * 1996-02-03 1996-03-14 Branofilter Gmbh Connector of a filter bag for vacuum cleaners
DE102005027078B4 (en) * 2005-06-11 2007-12-13 Jan-Robert Wulbrandt Device for fixing filter bags in devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200390305A1 (en) * 2016-12-23 2020-12-17 Eurofilters Holding N.V. Retainer Panel for a Vacuum Cleaner Bag, with Seal

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Publication number Publication date
DE502008001429D1 (en) 2010-11-11
EP2044874A2 (en) 2009-04-08
DE202007014164U1 (en) 2007-12-13
EP2044874A3 (en) 2009-09-30

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