EP2198765A2 - Sac d'aspirateur et procédé de fabrication d'un sac d'aspirateur - Google Patents

Sac d'aspirateur et procédé de fabrication d'un sac d'aspirateur Download PDF

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Publication number
EP2198765A2
EP2198765A2 EP09176472A EP09176472A EP2198765A2 EP 2198765 A2 EP2198765 A2 EP 2198765A2 EP 09176472 A EP09176472 A EP 09176472A EP 09176472 A EP09176472 A EP 09176472A EP 2198765 A2 EP2198765 A2 EP 2198765A2
Authority
EP
European Patent Office
Prior art keywords
vacuum cleaner
cleaner bag
filter material
bag according
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09176472A
Other languages
German (de)
English (en)
Other versions
EP2198765B1 (fr
EP2198765A3 (fr
Inventor
Wolfgang Dr. Czado
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wolf PVG GmbH and Co KG
Original Assignee
Wolf PVG GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40490528&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2198765(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wolf PVG GmbH and Co KG filed Critical Wolf PVG GmbH and Co KG
Publication of EP2198765A2 publication Critical patent/EP2198765A2/fr
Publication of EP2198765A3 publication Critical patent/EP2198765A3/fr
Application granted granted Critical
Publication of EP2198765B1 publication Critical patent/EP2198765B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

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 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 can be relatively accurately fit when operating in a vacuum cleaner chamber to the inner walls, so that the air flow is obstructed outside the vacuum cleaner bag 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 partially bypass the vacuum cleaner bag.
  • 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 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 outwards unhindered.
  • the device is shorter than the material portion of the filter material is formed, 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 outside in the flat state of the vacuum cleaner bag, plus a material section on a possible fold on one 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 may be formed of a spunbond having a basis weight of 10 to 50 g / m 2 . 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 to shorten 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 a vacuum cleaner bag, in which initially 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 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, which leads to 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 end to the tip 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.
  • a conventional vacuum cleaner bag comprises an interior 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.
  • a vacuum cleaner bag according to the invention is arranged, which has on opposite sides 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 if 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 'expands 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 to each other. At this weld, the strip is also fixed at opposite end portions.
  • the strip is formed shorter than the side wall 2, in particular 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 portions between the edge 7 and the tip of the inner fold 6 is formed.
  • 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 optionally other processing steps are carried out to complete the vacuum cleaner bag. 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. If the device is fixed at least on one side, a shortening is made in such a way.
  • this may be formed from a strip 10 of a shrinkable material.
  • Most 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 edge 7 and the folding edge 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 filter material contraction device. 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 consists of an elastic material, such as rubber, which is stretched before fixing to the filter material. 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 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 clogging 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 approximately 400 g, a volume flow of less than 90 m 3 / h is present.
  • a vacuum cleaner bag according to the invention was also tested by the same method.
  • a Spunbondst Shape of polypropylene with a basis weight of 30 g / m 2 was also inserted in the vacuum cleaner bag 1 such as shown in the FIGS. 2A and 2B is shown.
  • the strip had a width of 3 cm and a length of 18 cm.
  • the strip was welded between the two side seams in the middle of the side fold about 9 cm below the holding plate 3. The result when loading this vacuum cleaner bag 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Filtering Materials (AREA)
EP09176472.0A 2008-12-10 2009-11-19 Sac d'aspirateur et procédé de fabrication d'un sac d'aspirateur Not-in-force EP2198765B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008061250.2A DE102008061250C5 (de) 2008-12-10 2008-12-10 Staubsaugerbeutel und Verfahren zur Herstellung eines Staubsaugerbeutels

Publications (3)

Publication Number Publication Date
EP2198765A2 true EP2198765A2 (fr) 2010-06-23
EP2198765A3 EP2198765A3 (fr) 2010-11-10
EP2198765B1 EP2198765B1 (fr) 2016-06-01

Family

ID=40490528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09176472.0A Not-in-force EP2198765B1 (fr) 2008-12-10 2009-11-19 Sac d'aspirateur et procédé de fabrication d'un sac d'aspirateur

Country Status (2)

Country Link
EP (1) EP2198765B1 (fr)
DE (1) DE102008061250C5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2465397A1 (fr) * 2010-12-17 2012-06-20 Wolf PVG GmbH & Co. KG Sac d'aspirateur et procédé destiné à la fabrication d'un sac d'aspirateur
EP2442702B2 (fr) † 2009-06-19 2023-01-11 Eurofilters N.V. Sac plat pour aspirateur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061250C5 (de) * 2008-12-10 2018-12-20 Wolf Pvg Gmbh & Co. Kg Staubsaugerbeutel und Verfahren zur Herstellung eines Staubsaugerbeutels
EP2462854A1 (fr) 2010-12-09 2012-06-13 Miele & Cie. KG Système comprenant un aspirateur et un sac d'aspirateur
DE102018101075A1 (de) * 2018-01-18 2019-07-18 Vorwerk & Co. Interholding Gmbh Filter mit einem Filterinnenraum zur Aufnahme von Sauggut

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2268352A (en) * 1940-09-07 1941-12-30 Hoover Co Suction cleaner dirt bag
DE3129371A1 (de) * 1981-07-25 1983-02-17 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal Staubsauger-filtertuete
US4784676A (en) * 1987-11-12 1988-11-15 Hale Dorothy G Disposable vacuum cleaner bag
US5603741A (en) * 1994-05-09 1997-02-18 Hmi Industries, Inc. Vacuum cleaner and filter bag with air management
DE102005002420A1 (de) * 2005-01-18 2006-07-27 Miele & Cie. Kg Staubsaugerbeutel und Staubsauger mit einem Staubsammelraum zur Aufnahme von Staubsaugerbeuteln
DE202008003248U1 (de) * 2008-03-07 2008-05-08 Eurofilters Holding N.V. Staubsaugerfilterbeutel
DE102008045683B4 (de) * 2008-09-04 2012-08-16 Branofilter Gmbh Staubfilterbeuteleinrichtung für einen Staubsauger
DE102008061250C5 (de) * 2008-12-10 2018-12-20 Wolf Pvg Gmbh & Co. Kg Staubsaugerbeutel und Verfahren zur Herstellung eines Staubsaugerbeutels

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2442702B2 (fr) † 2009-06-19 2023-01-11 Eurofilters N.V. Sac plat pour aspirateur
EP2465397A1 (fr) * 2010-12-17 2012-06-20 Wolf PVG GmbH & Co. KG Sac d'aspirateur et procédé destiné à la fabrication d'un sac d'aspirateur

Also Published As

Publication number Publication date
DE102008061250B4 (de) 2013-12-12
DE102008061250C5 (de) 2018-12-20
EP2198765B1 (fr) 2016-06-01
DE102008061250A1 (de) 2009-04-30
EP2198765A3 (fr) 2010-11-10

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