EP2198765B1 - Vacuum cleaner bag and method for manufacturing vacuum cleaner bag - Google Patents

Vacuum cleaner bag and method for manufacturing vacuum cleaner bag Download PDF

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Publication number
EP2198765B1
EP2198765B1 EP09176472.0A EP09176472A EP2198765B1 EP 2198765 B1 EP2198765 B1 EP 2198765B1 EP 09176472 A EP09176472 A EP 09176472A EP 2198765 B1 EP2198765 B1 EP 2198765B1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
cleaner bag
filter material
bag
strip
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EP09176472.0A
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German (de)
French (fr)
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EP2198765A2 (en
EP2198765A3 (en
Inventor
Wolfgang Czado
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Wolf PVG GmbH and Co KG
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Wolf PVG GmbH and Co KG
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Application filed by Wolf PVG GmbH and Co KG filed Critical Wolf PVG GmbH and Co KG
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    • 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

Definitions

  • the present invention relates to a vacuum cleaner bag having an inner space surrounded by layers of filter material, wherein an inlet opening is formed in the filter material, and a method for producing such a vacuum cleaner bag.
  • vacuum cleaner bags are known that are made of soft voluminous nonwoven fabric and have a very good filtration performance.
  • the soft nonwoven material may be relatively close to the inner walls when operating in a vacuum cleaner chamber, so that the air flow outside the vacuum cleaner bag is hindered, and thus the filter material of the vacuum cleaner bag is not used evenly in all areas.
  • the vacuum cleaner chamber with the vacuum cleaner bag usually has only one outlet opening to a fan, so that outside the vacuum cleaner bag, the purified air is sucked off on one side, and therefore the air must flow around the vacuum cleaner bag partially.
  • equipment manufacturers have sometimes inserted spacer fins into the vacuum cleaner chamber to form ducts for air conduction.
  • these channels are also largely filled by the soft nonwoven material, so that high air resistance is given, which leads to a Saug chequeszel.
  • the DE 31 29 371 discloses a vacuum cleaner filter bag made of paper material in which a wall portion with a fold is provided. At the outer folding edges webs are set to prevent maximum unfolding of the folds.
  • the vacuum cleaner bag in the interior comprises at least one device for limiting the distance between two spaced locations of the filter material, which is connected on opposite sides with the filter material.
  • This device serves to stiffen the vacuum cleaner bag, which can no longer move freely in the area of the support by the device for limiting the distance of the filter material to the outside. It has surprisingly been found that by such a measure, the suction power decreases only slightly with increasing loading. In particular, less suction power losses occur outside of the vacuum cleaner bag in the chamber of a vacuum cleaner.
  • connection point may be linear, strip-shaped, punctiform or selected with other geometries, as long as the device prevents in that the filter material bulges freely outwards.
  • the device is formed shorter than the material portion of the filter material, which is arranged between the connection points. This ensures that the device is arranged at a distance from the filter material and is only connected at the end to the connection points with the filter material. As a result, the filter material is not covered, so that the suction power is not affected.
  • the device is formed shorter than a side wall of the vacuum cleaner bag, in particular by more than 5%, preferably also more than 10% shorter than the side wall.
  • the side wall is considered to be that region which is provided on the flat side of the vacuum cleaner bag on an outer side, plus a portion of material at a possible fold on an edge.
  • the device is designed as a strip which is fixed to opposite sides of the filter material.
  • the strip can be made of a thin air-permeable material, in particular of a nonwoven fabric, paper, rubber, a plastic film, a knitted or knitted fabric.
  • the strip of spunbond may be formed m 2 having a basis weight of 10 to 50 g /. Since the strip is loaded only with low forces to train, it can be made relatively narrow.
  • the vacuum cleaner bag comprises two layers of filter material, which are welded together at the edges, wherein the strip is fixed at opposite ends to a peripheral weld.
  • the vacuum cleaner bag can be manufactured in an effective manner.
  • the vacuum cleaner bag is designed as a block bottom bag.
  • an inwardly directed fold can be provided on opposite sides, at which the strip is fixed at the end.
  • the strip may be thermally shrunk. But other measures for shortening the strip, in particular mechanical means, such as loops, knots or gluing, are possible.
  • the vacuum cleaner bag may also be formed as a flat bag, so have no inward fold. Then the device or the strip can be particularly well attached to a marginal weld.
  • the device for limiting the distance between two spaced locations of the filter material can also be made of a rigid material, in particular cardboard or plastic. Then the device can be glued particularly well in the vacuum cleaner bag. A welding, in particular by means of ultrasound is possible.
  • a method for producing such a vacuum cleaner bag, in which initially a first sheet-like layer of filter material is fed, and then a device for limiting the distance between two spaced locations of the filter material is disposed on the first layer. Then, a second web-shaped layer of filter material is supplied, and the first and the second layer are welded together and cut to complete a vacuum cleaner bag.
  • the device for limiting the distance between two spaced locations of the filter material is further shortened after a determination on the filter material. This ensures that the device is formed shorter than a side wall of the vacuum cleaner bag, resulting in the inventive advantage of the inflation of the vacuum cleaner bag with a predetermined contour in operation.
  • the device is made of a shrinkable material which is thermally shrunk after fixing.
  • a spunbond strip made of polypropylene can be used, but other materials can be thermally shrunk.
  • the device may include a loop which is enlarged after the fixation of the filter material contraction device. The loop can then be fixed in the desired position.
  • the device of an elastic material and tension it before fixing to the filter material so that it then contracts after fixing to the filter material and thereby shortened.
  • a vacuum cleaner bag 1 comprises two side walls 2 of filter material, which are welded together at the edges to form a bag.
  • a holding plate 3 On a front side of the vacuum cleaner bag 1, a holding plate 3 is fixed, which has a closable by a flap 4 inlet opening.
  • the vacuum cleaner bag 1 is formed as a block bottom bag, wherein the side walls 2 are formed substantially rectangular, and are welded together at a bottom edge 5 on the side opposite to the holding plate 3 side.
  • an inwardly directed fold 6 is provided, which extends in cross-section V-shaped from an edge 7 of the side wall 2 inwardly.
  • the inner fold 6 can optionally be welded in the region of the holding plate 3 or can only be folded inwards.
  • the vacuum cleaner bag 1 forms an inner space 8, which is bounded by the side walls 2 and the inwardly directed folds 6. Furthermore, the inner space 8 is bounded by the bottom weld seam 5 and the holding plate 3 or by filter material on the holding plate 3.
  • a device 10 for limiting the distance between two spaced locations of the filter material is provided.
  • This device 10 is formed as a strip, which is fixed at the ends in each case at the top of the V-shaped fold 6.
  • FIG. 3A a vacuum cleaner bag is shown in the form of a block bottom bag in cross section, which is arranged in a rectangular in cross-section chamber 15 of a vacuum cleaner.
  • the chamber 15 may be formed so that an inlet port is provided on one end face, which cooperates with an inlet opening on the vacuum cleaner bag 1, and in which a suction channel is arranged to a fan on one of the sides of the chamber 15, in particular a front side.
  • the filter material may not lie flat against a wall of the chamber 15.
  • the conventional vacuum cleaner bag comprises an inner space 8 'which is bounded by the side walls 2' and an inner fold 6 'which is inflated outwardly upon application of a negative pressure by the suction fan.
  • FIG. 3B is arranged in the same chamber 15 of a vacuum cleaner of the vacuum cleaner bag 1 according to the invention, which has on opposite sides of side walls 2, which are interconnected via an inner fold 6.
  • a swelling of the inner fold 6 is avoided to the outside, since even when a high negative pressure by the suction fan, the inner fold 6 is held by the device 10 in position.
  • This ensures that a cross-sectional area 16 adjacent the inner fold 6 is significantly greater than when the inner fold 6 'inflates outwardly.
  • this cross-sectional area 16 can be flowed through in the chamber 15, and it is ensured that a sufficiently large flow channel is maintained to the suction fan.
  • the device 10 for limiting the distance is preferably made as a strip of an elastic material, in particular of nonwoven fabric, foil, paper, threads or other materials, and arranged in the interior space 8 spaced from the bottom seam 5 and the holding plate 3.
  • the strip is in a central region, ie substantially in a range between 30% to 70% of the distance between the holding plate 3 and the weld 5 is arranged.
  • the strip 10 may in particular be formed as a spunbond strip of polypropylene and have a basis weight between 10 and 50 g / m 2 , in particular between 20 g / m 2 to 40 g / m 2 .
  • the vacuum cleaner bag 1 may have in the region of the inner fold 6 at the V-shaped tip of the fold a weld at the two layers of filter material are firmly connected. At this weld, the strip 10 is also fixed at opposite end portions.
  • the strip 10 is formed shorter than the side wall 2, in particular as the side wall 2 plus the material portion of the inner fold 6, between the point at which the strip 10 is fixed and an outer edge 7.
  • the strip 10 is preferably more than 5%, in particular more than 10% shorter than the side wall 2 plus the two material sections formed between the edges 7 and the tips of the inner fold 6.
  • the vacuum cleaner bag 1 may be formed as a flat bag instead of a block bottom bag.
  • a device 10 for limiting the distance between two spaced locations of the filter material it is also possible, instead of a device 10 for limiting the distance between two spaced locations of the filter material, to provide a plurality of such devices 10 in a vacuum cleaner bag 1.
  • the individual devices 10 can act not only parallel in one direction but also in different directions.
  • a device 10 can also run between the two side walls 2.
  • an elastic material and rigid materials can be provided in the vacuum cleaner bag, in particular of cardboard or plastic to ensure a predetermined contour of the vacuum cleaner bag, even if a negative pressure is generated by the suction fan.
  • a vacuum cleaner bag For the production of a vacuum cleaner bag according to the invention, first a first sheet-like layer of filter material is supplied, and then a device for limiting the distance between two spaced locations of the filter material the first layer arranged. Subsequently, a second sheet-like layer of filter material is supplied, so that the device is arranged between the two layers. Then, the first and the second layer are welded on the edge, cut, and if necessary, other processing steps are carried out to complete the vacuum cleaner bag 1. Before the vacuum cleaner bag is finished, in particular when the two layers of filter material are still completely or partially opened, the device for limiting the distance between two spaced locations of the filter material is shortened.
  • this may be formed from a strip 10 of a shrinkable material.
  • the vacuum cleaner bags 1 are made of nonwoven fabric, which is multi-layered and is solidified at a temperature of about 140 ° C.
  • a material can be used, which can be thermally shrunk at a temperature between 70 ° C and 120 ° C, in particular at a temperature between 90 and 115 ° C. This ensures that the strip 10 can first be supplied in the same length as a side wall 2, optionally plus the two sections between the edges 7 and the folded edges 6, which means a simplification for the manufacturing process.
  • the device 10 may include a loop that may be increased after the end-side attachment of the device 10 for contraction of the filter material. Then, the loop is fixed in the desired position via locking means, adhesive or other means to effect a limitation of the movement of the filter material to the outside.
  • the device 10 is made of an elastic material, for example rubber, which is tensioned on the filter material before it is fixed. In the tensioned state then takes place a determination in the area of Weld seams between the layers of filter material. Subsequently, the vacuum cleaner bag 1 is released by a mechanical holding device, and the elastic strip ensures a contraction of the filter material and the shortening of the device 10th
  • the strip can be glued to itself, welded, knotted or otherwise fixed.
  • the device can also be shortened on the filter material by appropriate fastening means.
  • FIG. 4 is a graph for the suction performance of a vacuum cleaner bag according to the invention shown.
  • a block bottom bag made by Vorwerk Kobold FP 135 of a nonwoven material consisting of spunbond, meltblown and airlaid according to EN 60312 with DMT type 8 dust was measured for its blocking behavior. The result is shown in the bottom line. With an initially maximum volumetric flow, this decreases with increasing filling until, with a dust weight of about 400 g, a volumetric flow of less than 90 m 3 / h is present.
  • a vacuum cleaner bag 1 according to the invention was also tested by the same method.
  • a spunbond strip 10 made of polypropylene having a basis weight of 30 g / m 2 was additionally inserted into the vacuum cleaner bag 1, as in the FIGS. 2A and 2B is shown.
  • the strip 10 had a width of 3 cm and a length of 18 cm.
  • the strip 10 was welded between the two side seams in the middle of the soeinfaltung about 9 cm below the holding plate 3. The result when loading this vacuum cleaner bag 1 according to the invention with dust is shown in the upper line.
  • both vacuum cleaner bags initially have the same suction power, but with an increasing filling of the vacuum cleaner bag, the suction power is less strong, so that can be maintained at a Staubeinwaage of 400 g or more than 100 m 3 / h.

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

Description

Die vorliegende Erfindung betrifft einen Staubsaugerbeutel mit einem Innenraum, der von Lagen aus Filtermaterial umgeben ist, wobei eine Einlassöffnung in dem Filtermaterial ausgebildet ist, sowie ein Verfahren zur Herstellung eines derartigen Staubsaugerbeutels.The present invention relates to a vacuum cleaner bag having an inner space surrounded by layers of filter material, wherein an inlet opening is formed in the filter material, and a method for producing such a vacuum cleaner bag.

Es sind Staubsaugerbeutel bekannt, die aus weichem voluminösem Vliesstoff hergestellt sind und eine sehr gute Filterleistung besitzen. Das weiche Vliesmaterial kann sich beim Betrieb in einer Staubsaugerkammer jedoch relativ passgenau an die Innenwände anlegen, so dass die Luftströmung außerhalb des Staubsaugerbeutels behindert wird, und somit das Filtermaterial des Staubsaugerbeutels nicht in allen Bereichen gleichmäßig genutzt wird. Denn die Staubsaugerkammer mit dem Staubsaugerbeutel weist meist nur eine Auslassöffnung zu einem Gebläse auf, so dass außerhalb des Staubsaugerbeutels die gereinigte Luft an einer Seite abgesaugt wird, und die Luft daher den Staubsaugerbeutel teilweise umströmen muss. Um das Anlegen des Staubsaugerbeutels an eine Wand der Kammer zu vermeiden, haben Gerätehersteller teilweise Abstandsrippen in die Staubsaugerkammer eingebracht, damit Kanäle zur Luftleitung gebildet werden. Diese Kanäle werden durch das weiche Vliesstoffmaterial jedoch ebenfalls weitgehend ausgefüllt, so dass ein hoher Luftwiderstand gegeben ist, der zu einem Saugleistungsverlust führt.There are vacuum cleaner bags are known that are made of soft voluminous nonwoven fabric and have a very good filtration performance. However, the soft nonwoven material may be relatively close to the inner walls when operating in a vacuum cleaner chamber, so that the air flow outside the vacuum cleaner bag is hindered, and thus the filter material of the vacuum cleaner bag is not used evenly in all areas. Because the vacuum cleaner chamber with the vacuum cleaner bag usually has only one outlet opening to a fan, so that outside the vacuum cleaner bag, the purified air is sucked off on one side, and therefore the air must flow around the vacuum cleaner bag partially. To avoid applying the vacuum cleaner bag to a wall of the chamber, equipment manufacturers have sometimes inserted spacer fins into the vacuum cleaner chamber to form ducts for air conduction. However, these channels are also largely filled by the soft nonwoven material, so that high air resistance is given, which leads to a Saugleistungsverlust.

Zudem haben einige Gerätehersteller gesonderte Körbe für einen Staubsaugerbeutel entwickelt, damit die oben genannten Nachteile des Saugleistungsverlustes nicht auftreten. Die Herstellung gesonderter Körbe für einen Staubsaugerbeutel und deren Anbringung in einen Staubsauger ist jedoch ebenfalls aufwändig. Zudem reduziert sich das Staubraumvolumen, so dass nur kleinere Staubsaugerbeutel eingesetzt werden können.In addition, some equipment manufacturers have developed separate baskets for a vacuum cleaner bag so that the above-mentioned disadvantages of Saugleistungsverlustes not occur. However, the preparation of separate baskets for a vacuum cleaner bag and their attachment in a vacuum cleaner is also expensive. In addition, reduces the dust chamber volume, so that only smaller vacuum cleaner bags can be used.

Die DE 31 29 371 offenbart eine aus Papiermaterial gefertigte StaubsaugerFiltertüte, bei der ein Wandabschnitt mit einer Faltung vorgesehen ist. An den außenliegenden Faltkanten sind Stege festgelegt, die ein maximales Auffalten der Faltungen verhindern.The DE 31 29 371 discloses a vacuum cleaner filter bag made of paper material in which a wall portion with a fold is provided. At the outer folding edges webs are set to prevent maximum unfolding of the folds.

Es ist daher Aufgabe der vorliegenden Erfindung, einen Staubsaugerbeutel zu schaffen, der eine hohe Saugleistung auch bei zunehmender Beladung aufweist.It is therefore an object of the present invention to provide a vacuum cleaner bag, which has a high suction power even with increasing loading.

Ferner soll ein effektives Verfahren zur Herstellung eines solchen Staubsaugerbeutels geschaffen werden.Furthermore, an effective method for producing such a vacuum cleaner bag is to be created.

Diese Aufgabe wird mit einem Staubsaugerbeutel mit den Merkmalen des Anspruches 1 und einem Verfahren zur Herstellung eines Staubsaugerbeutels mit den Merkmalen des Anspruches 13 gelöst.This object is achieved with a vacuum cleaner bag having the features of claim 1 and a method for producing a vacuum cleaner bag having the features of claim 13.

Erfindungsgemäß umfasst der Staubsaugerbeutel in dem Innenraum mindestens eine Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials, die an gegenüberliegenden Seiten mit dem Filtermaterial verbunden ist. Diese Vorrichtung dient zur Versteifung des Staubsaugerbeutels, der sich im Bereich der Stützung durch die Vorrichtung zur Begrenzung des Abstandes des Filtermaterials nicht mehr ungehindert nach außen bewegen kann. Es hat sich überraschenderweise herausgestellt, dass durch eine solche Maßnahme die Saugleistung bei zunehmender Beladung nur geringfügig abfällt. Insbesondere entstehen weniger Saugleistungsverluste außerhalb des Staubsaugerbeutels in der Kammer eines Staubsaugers. Der im Anspruch 1 verwendete Begriff "Stelle" soll lediglich klarstellen, dass die Vorrichtung zur Begrenzung des Abstandes des Filtermaterials mit dem Filtermaterial verbunden ist, wobei die Geometrie der Verbindungsstelle linienförmig, streifenförmig, punktförmig oder mit anderen Geometrien gewählt sein kann, solange die Vorrichtung verhindert, dass sich das Filtermaterial ungehindert nach außen wölbt.According to the invention, the vacuum cleaner bag in the interior comprises at least one device for limiting the distance between two spaced locations of the filter material, which is connected on opposite sides with the filter material. This device serves to stiffen the vacuum cleaner bag, which can no longer move freely in the area of the support by the device for limiting the distance of the filter material to the outside. It has surprisingly been found that by such a measure, the suction power decreases only slightly with increasing loading. In particular, less suction power losses occur outside of the vacuum cleaner bag in the chamber of a vacuum cleaner. The term "location" used in claim 1 is merely intended to clarify that the device for limiting the distance of the filter material is connected to the filter material, wherein the geometry of the connection point may be linear, strip-shaped, punctiform or selected with other geometries, as long as the device prevents in that the filter material bulges freely outwards.

Gemäß der Erfindung ist die Vorrichtung kürzer als der Materialabschnitt des Filtermaterials ausgebildet, der zwischen den Verbindungsstellen angeordnet ist. Dadurch wird gewährleistet, dass die Vorrichtung beabstandet zu dem Filtermaterial angeordnet, und nur endseitig an den Verbindungsstellen mit dem Filtermaterial verbunden ist. Dadurch wird das Filtermaterial nicht überdeckt, so dass die Saugleistung nicht beeinträchtigt wird.According to the invention, the device is formed shorter than the material portion of the filter material, which is arranged between the connection points. This ensures that the device is arranged at a distance from the filter material and is only connected at the end to the connection points with the filter material. As a result, the filter material is not covered, so that the suction power is not affected.

In einer vorteilhaften Ausgestaltung ist die Vorrichtung kürzer als eine Seitenwand des Staubsaugerbeutels ausgebildet, insbesondere um mehr als 5 %, vorzugsweise auch um mehr als 10 % kürzer als die Seitenwand. Als Seitenwand wird derjenige Bereich angesehen, der im flachen Zustand des Staubsaugerbeutels an einer Außeiseite vorgesehen ist, zuzüglich einem Materialabschnitt an einer etwaigen Falte an einer Kante.In an advantageous embodiment, the device is formed shorter than a side wall of the vacuum cleaner bag, in particular by more than 5%, preferably also more than 10% shorter than the side wall. The side wall is considered to be that region which is provided on the flat side of the vacuum cleaner bag on an outer side, plus a portion of material at a possible fold on an edge.

Vorzugsweise ist die Vorrichtung als Streifen ausgebildet, der an gegenüberliegenden Seiten an dem Filtermaterial festgelegt ist. Der Streifen kann dabei aus einem dünnen luftdurchlässigen Material hergestellt sein, insbesondere auch aus einem Vliesstoff, Papier, Gummi, einer Kunststofffolie, einem Gewirke oder Gestricke. Insbesondere kann der Streifen aus einem Spunbond mit einem Flächengewicht von 10 bis 50 g/m2 ausgebildet sein. Da der Streifen nur mit geringen Kräften auf Zug belastet wird, kann er relativ schmal ausgebildet sein.Preferably, the device is designed as a strip which is fixed to opposite sides of the filter material. The strip can be made of a thin air-permeable material, in particular of a nonwoven fabric, paper, rubber, a plastic film, a knitted or knitted fabric. In particular, the strip of spunbond may be formed m 2 having a basis weight of 10 to 50 g /. Since the strip is loaded only with low forces to train, it can be made relatively narrow.

In einer weiteren Ausgestaltung umfasst der Staubsaugerbeutel zwei Lagen aus Filtermaterial, die randseitig miteinander verschweißt sind, wobei der Streifen an gegenüberliegenden Enden an einer randseitigen Schweißnaht festgelegt ist. Dadurch kann der Staubsaugerbeutel auf effektive Weise hergestellt werden.In a further embodiment, the vacuum cleaner bag comprises two layers of filter material, which are welded together at the edges, wherein the strip is fixed at opposite ends to a peripheral weld. Thereby, the vacuum cleaner bag can be manufactured in an effective manner.

Vorzugsweise ist der Staubsaugerbeutel als Klotzbodenbeutel ausgebildet. Dabei kann an gegenüberliegenden Seiten jeweils eine nach innen gerichtete Falte vorgesehen sein, an der der Streifen endseitig festgelegt ist. Um zu gewährleisten, dass der Streifen kürzer als eine Seitenwand ausgebildet ist, kann der Streifen thermisch geschrumpft sein. Aber auch andere Maßnahmen zum Verkürzen des Streifens, insbesondere mechanische Mittel, wie Schlaufen, Knoten oder ein Verkleben, sind möglichPreferably, the vacuum cleaner bag is designed as a block bottom bag. In each case an inwardly directed fold can be provided on opposite sides, at which the strip is fixed at the end. To ensure that the strip is formed shorter than a side wall, the strip may be thermally shrunk. But other measures for shortening the strip, in particular mechanical means, such as loops, knots or gluing, are possible

Zudem kann der Staubsaugerbeutel auch als Flachbeutel ausgebildet sein, also keine nach innen gerichtete Falte aufweisen. Dann lässt sich die Vorrichtung bzw. der Streifen besonders gut an einer randseitigen Schweißnaht befestigen.In addition, the vacuum cleaner bag may also be formed as a flat bag, so have no inward fold. Then the device or the strip can be particularly well attached to a marginal weld.

Die Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials kann auch aus einem steifen Material, insbesondere Pappe oder Kunststoff hergestellt sein. Dann lässt sich die Vorrichtung besonders gut in dem Staubsaugerbeutel verkleben. Auch ein Verschweißen, insbesondere mittels Ultraschall ist möglich.The device for limiting the distance between two spaced locations of the filter material can also be made of a rigid material, in particular cardboard or plastic. Then the device can be glued particularly well in the vacuum cleaner bag. A welding, in particular by means of ultrasound is possible.

Erfindungsgemäß wird auch ein Verfahren zur Herstellung eines derartigen Staubsaugerbeutels bereitgestellt, bei dem zunächst eine erste bahnförmige Lage aus Filtermaterial zugeführt, und dann eine Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials an der ersten Lage angeordnet wird. Dann wird eine zweite bahnförmige Lage aus Filtermaterial zugeführt, und die erste und die zweite Lage werden zur Fertigstellung eines Staubsaugerbeutels miteinander verschweißt und geschnitten. Bei dem erfindungsgemäßen Verfahren wird ferner die Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials nach einer Festlegung an dem Filtermaterial verkürzt. Dadurch wird gewährleistet, dass die Vorrichtung kürzer ausgebildet ist als eine Seitenwand des Staubsaugerbeutels, was zu dem erfindungsgemäßen Vorteil der Aufblähung des Staubsaugerbeutels mit einer vorbestimmten Kontur im Betrieb führt.According to the invention, a method is also provided for producing such a vacuum cleaner bag, in which initially a first sheet-like layer of filter material is fed, and then a device for limiting the distance between two spaced locations of the filter material is disposed on the first layer. Then, a second web-shaped layer of filter material is supplied, and the first and the second layer are welded together and cut to complete a vacuum cleaner bag. In the method according to the invention, the device for limiting the distance between two spaced locations of the filter material is further shortened after a determination on the filter material. This ensures that the device is formed shorter than a side wall of the vacuum cleaner bag, resulting in the inventive advantage of the inflation of the vacuum cleaner bag with a predetermined contour in operation.

In einer bevorzugten Ausgestaltung des erfindungsgemäßen Verfahrens ist die Vorrichtung aus einem schrumpffähigen Material hergestellt, das nach der Festlegung thermisch geschrumpft wird. Hierbei kann insbesondere ein Spunbondstreifen aus Polypropylen eingesetzt werden, aber auch andere Materialien können thermisch geschrumpft werden. Alternativ kann die Vorrichtung eine Schlaufe aufweisen, die nach der Festlegung der Vorrichtung zum Zusammenziehen des Filtermaterials vergrößert wird. Die Schlaufe kann dann in der gewünschten Position fixiert werden.In a preferred embodiment of the method according to the invention, the device is made of a shrinkable material which is thermally shrunk after fixing. In this case, in particular, a spunbond strip made of polypropylene can be used, but other materials can be thermally shrunk. Alternatively, the device may include a loop which is enlarged after the fixation of the filter material contraction device. The loop can then be fixed in the desired position.

Ferner ist es möglich, die Vorrichtung aus einem elastischen Material herzustellen und vor der Festlegung an dem Filtermaterial zu spannen, damit sie sich dann nach der Festlegung an dem Filtermaterial zusammenzieht und dadurch verkürzt.Further, it is possible to make the device of an elastic material and tension it before fixing to the filter material so that it then contracts after fixing to the filter material and thereby shortened.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles mit Bezug auf die beigefügten Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine Ansicht eines erfindungsgemäßen Staubsaugerbeutels;
Figuren 2A, 2B
zwei schematische Ansichten des Staubsaugerbeutels der Figur 1;
Figur 3A
eine schematische Schnittansicht durch eine Kammer eines Staubsaugers mit einem Staubsaugerbeutel nach dem Stand der Technik;
Figur 3B
eine schematische Schnittansicht einer Kammer eines Staubsaugers mit einem erfindungsgemäßen Staubsaugerbeutel, und
Figur 4
ein Diagramm zur Saugleistung eines erfindungsgemäßen Staubsaugerbeutels.
The invention will be explained in more detail using an exemplary embodiment with reference to the accompanying drawings. Show it:
FIG. 1
a view of a vacuum cleaner bag according to the invention;
FIGS. 2A, 2B
two schematic views of the vacuum cleaner bag of FIG. 1 ;
FIG. 3A
a schematic sectional view through a chamber of a vacuum cleaner with a vacuum cleaner bag according to the prior art;
FIG. 3B
a schematic sectional view of a chamber of a vacuum cleaner with a vacuum cleaner bag according to the invention, and
FIG. 4
a diagram for the suction performance of a vacuum cleaner bag according to the invention.

Ein Staubsaugerbeutel 1 umfasst zwei Seitenwände 2 aus Filtermaterial, die randseitig miteinander zur Ausbildung eines Beutels verschweißt sind. An einer Stirnseite des Staubsaugerbeutels 1 ist eine Halteplatte 3 festgelegt, die eine durch eine Klappe 4 verschließbare Einlassöffnung aufweist.A vacuum cleaner bag 1 comprises two side walls 2 of filter material, which are welded together at the edges to form a bag. On a front side of the vacuum cleaner bag 1, a holding plate 3 is fixed, which has a closable by a flap 4 inlet opening.

Der Staubsaugerbeutel 1 ist als Klotzbodenbeutel ausgebildet, wobei die Seitenwände 2 im Wesentlichen rechteckig ausgebildet sind, und an einer Bodenkante 5 auf der zur Halteplatte 3 gegenüberliegenden Seite miteinander verschweißt sind. An den gegenüberliegenden Längsseiten ist jeweils eine nach innen gerichtete Falte 6 vorgesehen, die sich im Querschnitt V-förmig von einer Kante 7 der Seitenwand 2 nach innen erstreckt. Die innere Falte 6 kann im Bereich der Halteplatte 3 optional verschweißt sein oder nur nach innen eingefaltet sein.The vacuum cleaner bag 1 is formed as a block bottom bag, wherein the side walls 2 are formed substantially rectangular, and are welded together at a bottom edge 5 on the side opposite to the holding plate 3 side. On the opposite longitudinal sides in each case an inwardly directed fold 6 is provided, which extends in cross-section V-shaped from an edge 7 of the side wall 2 inwardly. The inner fold 6 can optionally be welded in the region of the holding plate 3 or can only be folded inwards.

Wie in den schematischen Ansichten der Figuren 2A und 2B erkennbar ist, bildet der Staubsaugerbeutel 1 einen Innenraum 8 aus, der durch die Seitenwände 2 und die nach innen gerichteten Falten 6 begrenzt ist. Ferner ist der Innenraum 8 durch die Bodenschweißnaht 5 und die Halteplatte 3 bzw. durch Filtermaterial an der Halteplatte 3 begrenzt.As in the schematic views of FIGS. 2A and 2B can be seen, the vacuum cleaner bag 1 forms an inner space 8, which is bounded by the side walls 2 and the inwardly directed folds 6. Furthermore, the inner space 8 is bounded by the bottom weld seam 5 and the holding plate 3 or by filter material on the holding plate 3.

Um zu vermeiden, dass der Staubsaugerbeutel 1 sich im Bereich der nach innen gerichteten Falten 6 nach außen aufbläht, und somit einen Zwischenraum zwischen einer umgebenden Kammer und dem Staubsaugerbeutel 1 verschließt, ist eine Vorrichtung 10 zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials vorgesehen. Diese Vorrichtung 10 ist als Streifen ausgebildet, der endseitig jeweils an der Spitze der V-förmigen Faltung 6 festgelegt ist.In order to avoid that the vacuum cleaner bag 1 inflates outwardly in the region of the inward pleats 6, and thus closes a gap between a surrounding chamber and the vacuum cleaner bag 1, a device 10 for limiting the distance between two spaced locations of the filter material is provided. This device 10 is formed as a strip, which is fixed at the ends in each case at the top of the V-shaped fold 6.

Die Funktion der Vorrichtung 10 wird mit Bezug auf die Figuren 3A und 3B erläutert.The function of the device 10 will be described with reference to FIGS FIGS. 3A and 3B explained.

In Figur 3A ist ein Staubsaugerbeutel in Form eines Klotzbodenbeutels im Querschnitt dargestellt, der in einer im Querschnitt rechteckigen Kammer 15 eines Staubsaugers angeordnet ist. Die Kammer 15 kann so ausgebildet sein, dass an einer Stirnseite ein Einlassstutzen vorgesehen ist, der mit einer Einlassöffnung an dem Staubsaugerbeutel 1 zusammenwirkt, und bei der ein Saugkanal zu einem Gebläse an einer der Seiten der Kammer 15 angeordnet ist, insbesondere einer Stirnseite. Um die gesamte Fläche des Filtermaterials des Staubsaugerbeutels durchströmen zu können, darf das Filtermaterial nicht flächig an einer Wand der Kammer 15 anliegen. Der herkömmliche Staubsaugerbeutel umfasst einen Innenraum 8', der durch die Seitenwände 2' und eine innere Faltung 6' begrenzt ist, die bei Anliegen eines Unterdruckes durch das Sauggebläse nach außen aufgebläht wird. Dadurch wird in einem stirnseitigen Bereich der Kammer 15 ein Querschnitt 16' zwischen dem Filtermaterial im Bereich der inneren Faltung 6' und der Kammer 15 stark verkleinert, was dazu führt, das in diesen Bereichen ein hoher Saugwiderstand gegeben ist.In FIG. 3A a vacuum cleaner bag is shown in the form of a block bottom bag in cross section, which is arranged in a rectangular in cross-section chamber 15 of a vacuum cleaner. The chamber 15 may be formed so that an inlet port is provided on one end face, which cooperates with an inlet opening on the vacuum cleaner bag 1, and in which a suction channel is arranged to a fan on one of the sides of the chamber 15, in particular a front side. In order to be able to flow through the entire surface of the filter material of the vacuum cleaner bag, the filter material may not lie flat against a wall of the chamber 15. The conventional vacuum cleaner bag comprises an inner space 8 'which is bounded by the side walls 2' and an inner fold 6 'which is inflated outwardly upon application of a negative pressure by the suction fan. As a result, in a frontal region of the chamber 15, a cross section 16 'between the filter material in the region of the inner fold 6' and the chamber 15 is greatly reduced, which leads to a high suction resistance is given in these areas.

In Figur 3B ist in der gleichen Kammer 15 eines Staubsaugers der erfindungsgemäße Staubsaugerbeutel 1 angeordnet, der an gegenüberliegenden Seiten Seitenwände 2 aufweist, die über eine innere Faltung 6 miteinander verbunden sind. Durch die Vorrichtung 10 zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials wird ein Aufblähen der inneren Faltung 6 nach außen vermieden, da auch bei Anliegen eines hohen Unterdruckes durch das Sauggebläse die innere Faltung 6 durch die Vorrichtung 10 in Position gehalten wird. Dies gewährleistet, dass eine Querschnittsfläche 16 benachbart zu der inneren Faltung 6 deutlich größer ist als bei einem Aufblähen der inneren Faltung 6' nach außen. Dadurch kann diese Querschnittsfläche 16 in der Kammer 15 durchströmt werden, und es wird gewährleistet, dass ein ausreichend großer Strömungskanal zu dem Sauggebläse aufrechterhalten wird.In FIG. 3B is arranged in the same chamber 15 of a vacuum cleaner of the vacuum cleaner bag 1 according to the invention, which has on opposite sides of side walls 2, which are interconnected via an inner fold 6. By the device 10 for limiting the distance between two spaced locations of the filter material, a swelling of the inner fold 6 is avoided to the outside, since even when a high negative pressure by the suction fan, the inner fold 6 is held by the device 10 in position. This ensures that a cross-sectional area 16 adjacent the inner fold 6 is significantly greater than when the inner fold 6 'inflates outwardly. As a result, this cross-sectional area 16 can be flowed through in the chamber 15, and it is ensured that a sufficiently large flow channel is maintained to the suction fan.

Die Vorrichtung 10 zur Begrenzung des Abstandes ist vorzugsweise als Streifen aus einem elastischen Material, insbesondere aus Vliesstoff, Folie, Papier, Fäden oder anderen Materialien hergestellt, und in dem Innenraum 8 beabstandet von der Bodennaht 5 und der Halteplatte 3 angeordnet. Vorzugsweise ist der Streifen in einem mittleren Bereich, also im Wesentlichen in einem Bereich zwischen 30 % bis 70 % des Abstandes zwischen der Halteplatte 3 und der Schweißnaht 5 angeordnet. Der Streifen 10 kann insbesondere als Spunbondstreifen aus Polypropylen ausgebildet sein und ein Flächengewicht zwischen 10 und 50 g/m2, insbesondere zwischen 20 g/m2 bis 40 g/m2 aufweisen.The device 10 for limiting the distance is preferably made as a strip of an elastic material, in particular of nonwoven fabric, foil, paper, threads or other materials, and arranged in the interior space 8 spaced from the bottom seam 5 and the holding plate 3. Preferably, the strip is in a central region, ie substantially in a range between 30% to 70% of the distance between the holding plate 3 and the weld 5 is arranged. The strip 10 may in particular be formed as a spunbond strip of polypropylene and have a basis weight between 10 and 50 g / m 2 , in particular between 20 g / m 2 to 40 g / m 2 .

Der Staubsaugerbeutel 1 kann im Bereich der inneren Faltung 6 an der V-förmigen Spitze der Faltung eine Schweißnaht aufweisen, an der zwei Lagen aus Filtermaterial miteinander fest verbunden sind. An dieser Schweißnaht ist der Streifen 10 an gegenüberliegenden Endabschnitten ebenfalls festgelegt. Der Streifen 10 ist dabei kürzer ausgebildet als die Seitenwand 2, insbesondere als die Seitenwand 2 zuzüglich des Materialabschnittes der inneren Faltung 6, zwischen der Stelle, an der der Streifen 10 festgelegt ist und einer äußeren Kante 7. Der Streifen 10 ist vorzugsweise um mehr als 5 %, insbesondere mehr als 10 % kürzer als die Seitenwand 2 zuzüglich der beiden Materialabschnitte zwischen den Kanten 7 und den Spitzen der inneren Faltung 6 ausgebildet.The vacuum cleaner bag 1 may have in the region of the inner fold 6 at the V-shaped tip of the fold a weld at the two layers of filter material are firmly connected. At this weld, the strip 10 is also fixed at opposite end portions. The strip 10 is formed shorter than the side wall 2, in particular as the side wall 2 plus the material portion of the inner fold 6, between the point at which the strip 10 is fixed and an outer edge 7. The strip 10 is preferably more than 5%, in particular more than 10% shorter than the side wall 2 plus the two material sections formed between the edges 7 and the tips of the inner fold 6.

Der Staubsaugerbeutel 1 kann statt als Klotzbodenbeutels auch als Flachbeutel ausgebildet sein.The vacuum cleaner bag 1 may be formed as a flat bag instead of a block bottom bag.

Zudem ist es möglich, statt einer Vorrichtung 10 zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials mehrere solche Vorrichtungen 10 in einem Staubsaugerbeutel 1 vorzusehen. Die einzelnen Vorrichtungen 10 können dabei nicht nur parallel in eine Richtung, sondern auch in verschiedene Richtungen wirken. Ferner kann eine Vorrichtung 10 statt zwischen den Falten 6 auch zwischen den beiden Seitenwänden 2 verlaufen.It is also possible, instead of a device 10 for limiting the distance between two spaced locations of the filter material, to provide a plurality of such devices 10 in a vacuum cleaner bag 1. The individual devices 10 can act not only parallel in one direction but also in different directions. Furthermore, instead of between the folds 6, a device 10 can also run between the two side walls 2.

Statt eines elastischen Materials können auch formsteife Materialien in dem Staubsaugerbeutel vorgesehen sein, insbesondere aus Pappe oder Kunststoff, um eine vorbestimmte Kontur des Staubsaugerbeutels zu gewährleisten, auch wenn ein Unterdruck durch das Sauggebläse erzeugt wird.Instead of an elastic material and rigid materials can be provided in the vacuum cleaner bag, in particular of cardboard or plastic to ensure a predetermined contour of the vacuum cleaner bag, even if a negative pressure is generated by the suction fan.

Für die Herstellung eines erfindungsgemäßen Staubsaugerbeutels wird zunächst eine erste bahnförmige Lage aus Filtermaterial zugeführt, und dann eine Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials an der ersten Lage angeordnet. Anschließend wird eine zweite bahnförmige Lage aus Filtermaterial zugeführt, so dass die Vorrichtung zwischen den beiden Lagen angeordnet ist. Dann werden die erste und die zweite Lage randseitig verschweißt, geschnitten, und gegebenenfalls werden andere Bearbeitungsschritte durchgeführt, um den Staubsaugerbeutel 1 fertig zu stellen. Vor einem Fertigstellen des Staubsaugerbeutels, insbesondere wenn die beiden Lagen aus Filtermaterial noch ganz oder teilweise geöffnet sind, wird die Vorrichtung zur Begrenzung des Abstandes zweier beabstandeter Stellen des Filtermaterials verkürzt.For the production of a vacuum cleaner bag according to the invention, first a first sheet-like layer of filter material is supplied, and then a device for limiting the distance between two spaced locations of the filter material the first layer arranged. Subsequently, a second sheet-like layer of filter material is supplied, so that the device is arranged between the two layers. Then, the first and the second layer are welded on the edge, cut, and if necessary, other processing steps are carried out to complete the vacuum cleaner bag 1. Before the vacuum cleaner bag is finished, in particular when the two layers of filter material are still completely or partially opened, the device for limiting the distance between two spaced locations of the filter material is shortened.

Für das Kürzen der Vorrichtung 10 kann diese aus einem Streifen 10 aus einem schrumpffähigen Material gebildet sein. Die Staubsaugerbeutel 1 werden aus Vliesstoff hergestellt, der mehrlagig ausgebildet ist und bei einer Temperatur von rund 140° C verfestigt wird. Dann kann als Streifen 10 ein Material eingesetzt werden, das thermisch geschrumpft werden kann bei einer Temperatur zwischen 70° C und 120° C, insbesondere bei einer Temperatur zwischen 90 und 115°C. Dadurch wird erreicht, dass der Streifen 10 zunächst in gleicher Länge wie eine Seitenwand 2, gegebenenfalls zuzüglich der beiden Abschnitte zwischen den Kanten 7 und den Faltkanten 6 zugeführt werden kann, was für den Herstellungsprozess eine Vereinfachung bedeutet. Nach dem randseitigen Verschweißen des Streifens 10 im Bereich der inneren Faltung 6 kann dann ein Verkürzen derart erfolgen, dass bei geöffnetem Staubsaugerbeutel eine Wärmezufuhr erfolgt, mittels der der Streifen 10 um das notwendige Maß, beispielsweise um mehr als 10 % geschrumpft wird.For shortening the device 10, this may be formed from a strip 10 of a shrinkable material. The vacuum cleaner bags 1 are made of nonwoven fabric, which is multi-layered and is solidified at a temperature of about 140 ° C. Then, as a strip 10, a material can be used, which can be thermally shrunk at a temperature between 70 ° C and 120 ° C, in particular at a temperature between 90 and 115 ° C. This ensures that the strip 10 can first be supplied in the same length as a side wall 2, optionally plus the two sections between the edges 7 and the folded edges 6, which means a simplification for the manufacturing process. After the edge-side welding of the strip 10 in the region of the inner fold 6, a shortening can then take place such that when the vacuum cleaner bag is opened, a heat supply takes place by means of which the strip 10 is shrunk by the necessary amount, for example by more than 10%.

Um die Vorrichtung 10 zu verkürzen, können natürlich auch andere Verfahren eingesetzt werden. Beispielsweise kann die Vorrichtung 10 eine Schlaufe aufweisen, die nach der endseitigen Festlegung der Vorrichtung 10 zum Zusammenziehen des Filtermaterials vergrößert werden kann. Dann wird die Schlaufe in der gewünschten Position über Rastmittel, Kleber oder andere Mittel fixiert, um eine Begrenzung der Bewegung des Filtermaterials nach außen zu bewirken.Of course, to shorten the device 10, other methods may be used. For example, the device 10 may include a loop that may be increased after the end-side attachment of the device 10 for contraction of the filter material. Then, the loop is fixed in the desired position via locking means, adhesive or other means to effect a limitation of the movement of the filter material to the outside.

Zudem ist es möglich, dass die Vorrichtung 10 aus einem elastischen Material, beispielsweise Gummi, besteht, das vor der Festlegung an dem Filtermaterial gespannt wird. In dem gespannten Zustand erfolgt dann eine Festlegung im Bereich der Schweißnähte zwischen den Lagen aus Filtermaterial. Anschließend wird der Staubsaugerbeutel 1 durch eine mechanische Haltevorrichtung freigegeben, und der elastische Streifen sorgt für ein Zusammenziehen des Filtermaterials und die Verkürzung der Vorrichtung 10.In addition, it is possible that the device 10 is made of an elastic material, for example rubber, which is tensioned on the filter material before it is fixed. In the tensioned state then takes place a determination in the area of Weld seams between the layers of filter material. Subsequently, the vacuum cleaner bag 1 is released by a mechanical holding device, and the elastic strip ensures a contraction of the filter material and the shortening of the device 10th

Auch andere Verfahren zum Verkürzen der Vorrichtung bzw. des Streifens 10 können eingesetzt werden. Insbesondere kann der Streifen mit sich selbst verklebt, verschweißt, verknotet oder anderweitig fixiert werden. Zudem kann die Vorrichtung auch am Filtermaterial durch entsprechende Befestigungsmittel verkürzt werden.Other methods of shortening the device or strip 10 may be used. In particular, the strip can be glued to itself, welded, knotted or otherwise fixed. In addition, the device can also be shortened on the filter material by appropriate fastening means.

In Figur 4 ist eine Grafik zur Saugleistung eines erfindungsgemäßen Staubsaugerbeutels dargestellt. Für den Versuch wurde ein Klotzbodenbeutel der Firma Vorwerk Kobold FP 135 aus einem Vliesstoffmaterial, bestehend aus Spunbond, Meltblow und Airlaid gemäß EN 60312 mit DMT-Typ-8-Staub auf sein Verstopfungsverhalten gemessen. Das Ergebnis ist in der unteren Linie gezeigt. Bei einem anfänglich maximalen Volumenstrom nimmt dieser bei zunehmender Befüllung ab, bis bei einer Staubeinwaage von etwa 400 g ein Volumenstrom von weniger als 90 m3/h vorhanden ist.In FIG. 4 is a graph for the suction performance of a vacuum cleaner bag according to the invention shown. For the test, a block bottom bag made by Vorwerk Kobold FP 135 of a nonwoven material consisting of spunbond, meltblown and airlaid according to EN 60312 with DMT type 8 dust was measured for its blocking behavior. The result is shown in the bottom line. With an initially maximum volumetric flow, this decreases with increasing filling until, with a dust weight of about 400 g, a volumetric flow of less than 90 m 3 / h is present.

Im Vergleich dazu wurde ein erfindungsgemäßer Staubsaugerbeutel 1 ebenfalls nach der gleichen Methode getestet. Bei diesem Staubsaugerbeutel 1 wurde jedoch zusätzlich ein Spunbondstreifen 10 aus Polypropylen mit einem Flächengewicht von 30 g/m2 in den Staubsaugerbeutel 1 eingefügt, so wie dies in dem Figuren 2A und 2B dargestellt ist. Der Streifen 10 wies eine Breite von 3 cm und eine Länge von 18 cm auf. Der Streifen 10 wurde zwischen den beiden Seitennähten in der Mitte der Seiteneinfaltung etwa 9 cm unter der Halteplatte 3 eingeschweißt. Das Ergebnis beim Beladen dieses erfindungsgemäßen Staubsaugerbeutels 1 mit Staub ist in der oberen Linie dargestellt. Wie erkennbar ist, besitzen beide Staubsaugerbeutel anfangs zunächst eine gleiche Saugleistung, allerdings fällt bei einer zunehmenden Befüllung des Staubsaugerbeutels die Saugleistung weniger stark ab, so dass bei einer Staubeinwaage von 400 g noch über 100 m3/h aufrechterhalten werden können.In comparison, a vacuum cleaner bag 1 according to the invention was also tested by the same method. In this vacuum cleaner bag 1, however, a spunbond strip 10 made of polypropylene having a basis weight of 30 g / m 2 was additionally inserted into the vacuum cleaner bag 1, as in the FIGS. 2A and 2B is shown. The strip 10 had a width of 3 cm and a length of 18 cm. The strip 10 was welded between the two side seams in the middle of the Seiteneinfaltung about 9 cm below the holding plate 3. The result when loading this vacuum cleaner bag 1 according to the invention with dust is shown in the upper line. As can be seen, both vacuum cleaner bags initially have the same suction power, but with an increasing filling of the vacuum cleaner bag, the suction power is less strong, so that can be maintained at a Staubeinwaage of 400 g or more than 100 m 3 / h.

Claims (16)

  1. Vacuum cleaner bag (1) of non-woven material, with an interior space (8) which is surrounded by two layers of filter material welded together at an edge, wherein an inlet opening is formed in the filter material, wherein in addition at least one device (10) for limiting the spacing of two adjacent locations of the filter material is provided in the interior space (8) and is connected at opposite sides with the filter material, and wherein the device (10) is constructed to be shorter than the material section of the filter material arranged between the two locations of the device (10) at the filter material.
  2. Vacuum cleaner bag (1) according to claim 1, characterised in that the device (10) is constructed to be shorter, preferably by at least 5%, than a side wall (2) of the vacuum cleaner bag (1).
  3. Vacuum cleaner bag (1) according to claim 1 or 2, characterised in that the device (10) is constructed as a strip.
  4. Vacuum cleaner bag (1) according to claim 3, characterised in that the strip (10) is fixed at opposite ends at an edge weld seam.
  5. Vacuum cleaner bag (1) according to any one of claims 1 to 4, characterised in that the vacuum cleaner bag (1) is constructed as a block base bag.
  6. Vacuum cleaner bag (1) according to claim 5, characterised in that a respective inwardly directed fold (6) is provided at opposite sides and that the strip (10) is connected with the folds (6).
  7. Vacuum cleaner bag (1) according to any one of claims 1 to 6, characterised in that the vacuum cleaner bag is constructed as a flat bag.
  8. Vacuum cleaner bag (1) according to any one of claims 1 to 7, characterised in that the device (10) is formed from a strip which is thermally shrunk.
  9. Vacuum cleaner bag (1) according to any one of claims 1 to 8, characterised in that the device (10) is produced from a resilient material, particularly a non-woven material, rubber, a plastics material film, or a knitted or crocheted fabric.
  10. Vacuum cleaner bag (1) according to any one of claims 1 to 9, characterised in that the device (10) comprises a loop fixable in a predetermined position.
  11. Vacuum cleaner bag (1) according to any one of claims 1 to 7, characterised in that the device (10) is produced from a stiff material, particularly cardboard or plastics material.
  12. Vacuum cleaner bag (1) according to any one of claims 1 to 11, characterised in that the device (10) is glued or welded, preferably by ultrasound, to the filter material.
  13. Method of producing a vacuum cleaner bag (1) particularly according to any one of the preceding claims, with the following steps:
    - feeding a first web-shaped layer of filter material;
    - arranging a device (10) for limiting the spacing of two adjacent points of the filter material at the first layer, which is connected with the filter material at opposite sides;
    - feeding a second web-shaped layer of filter material; and
    - welding the first and second layers at an edge and finishing the vacuum cleaner bag (1),
    - wherein for limiting the spacing of two spaced-apart locations of the filter material the device (10) is shortened after fixing to the filter material.
  14. Method according to claim 13, characterised in that the device (10) is produced from shrinkable material and is thermally shrunk after the fixing.
  15. Method according to claim 13, characterised in that the device (10) comprises a loop and the loop after fixing of the device (10) is enlarged for drawing together the filter material.
  16. Method according to claim 13, characterised in that the device (10) consists of a resilient material which is tensioned prior to fixing to the filter material and contracts after fixing.
EP09176472.0A 2008-12-10 2009-11-19 Vacuum cleaner bag and method for manufacturing vacuum cleaner bag Not-in-force EP2198765B1 (en)

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DK3195782T3 (en) † 2009-06-19 2019-04-15 Eurofilters Nv Flat bag for vacuum cleaner
EP2462854A1 (en) * 2010-12-09 2012-06-13 Miele & Cie. KG System made of a vacuum cleaner and dust bag
EP2465397B1 (en) * 2010-12-17 2014-06-11 Wolf PVG GmbH & Co. KG Vacuum cleaner bag and method for manufacturing same
DE102018101075A1 (en) * 2018-01-18 2019-07-18 Vorwerk & Co. Interholding Gmbh Filter with a filter interior for holding suction material

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DE202008008989U1 (en) 2008-03-07 2008-09-04 Eurofilters Holding N.V. Vacuum cleaner filter bag

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DE102008061250C5 (en) 2018-12-20
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EP2198765A3 (en) 2010-11-10
DE102008061250B4 (en) 2013-12-12

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