EP4197773A1 - Procédé et dispositif de fabrication d'un sac d'aspirateur et sac d'aspirateur - Google Patents

Procédé et dispositif de fabrication d'un sac d'aspirateur et sac d'aspirateur Download PDF

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Publication number
EP4197773A1
EP4197773A1 EP22202661.9A EP22202661A EP4197773A1 EP 4197773 A1 EP4197773 A1 EP 4197773A1 EP 22202661 A EP22202661 A EP 22202661A EP 4197773 A1 EP4197773 A1 EP 4197773A1
Authority
EP
European Patent Office
Prior art keywords
spring
filter material
vacuum cleaner
cleaner bag
web
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.)
Pending
Application number
EP22202661.9A
Other languages
German (de)
English (en)
Inventor
Wolfgang Czado
Gerold SCHANDL
Bernd Wehage
Zoran Jevtic
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
Application filed by Wolf PVG GmbH and Co KG filed Critical Wolf PVG GmbH and Co KG
Publication of EP4197773A1 publication Critical patent/EP4197773A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/10—Feeding or positioning webs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2241/00—Making bags or boxes intended for a specific use
    • B31B2241/008—Making suction cleaner bags

Definitions

  • the present invention relates to a method and a device for producing a vacuum cleaner bag and a vacuum cleaner bag with two layers of filter material which surround an inner space and are unconnected at an inflow opening, a spring being arranged in a hem around the inflow opening.
  • the DE 10 2019 103 908 A1 discloses a vacuum cleaner bag in which two layers of filter material are unconnected in the area of an inflow opening, a seam with a spring element being provided around the inflow opening. As a result, the inflow opening can be biased into a closed position.
  • the production of a vacuum cleaner bag with two layers of filter material, which are welded together on three sides and form an inflow opening with a hem on a fourth side, is comparatively complex.
  • a spring is provided which is fed to a web of filter material.
  • a band or another separately manufactured or integrally formed sheet of filter material is placed on the sheet of filter material, with the spring lying on the sheet of filter material or being fed over the further sheet of filter material or the band.
  • the spring is thus placed in a pocket, preferably formed by a closed interior, to then fold the sheet of filter material and the pocket in which the spring is placed.
  • the bags are then connected to the free ends of the spring in order then a vacuum cleaner bag with a hem and feather to finish an inflow opening.
  • the vacuum cleaner bag can be assembled effectively, since both the web of filter material and the spring are folded during folding, which is then later arranged in the hem around an inflow opening of the vacuum cleaner bag and biases it into a closed position.
  • the spring is preferably designed as an elongate leaf spring, in particular made of metal, which is folded perpendicularly to its longitudinal direction. Then the folded leaf spring surrounds the inflow opening on the vacuum cleaner bag.
  • the pocket for the spring can be made by welding or gluing the sheet of filter material along seams, in particular welded or glued seams, to the band or the further sheet of filter material.
  • the further web of filter material can be formed integrally with the web of filter material for producing the vacuum cleaner bag or can be supplied as a separate web to form a bag.
  • the web of filter material is formed integrally with the pocket, which is advantageous for automated production in order to further process the web of filter material with the spring arranged in the pocket.
  • the spring preferably has a profiling which serves to align the spring when folding the spring and the web of filter material.
  • the profiling can be designed, for example, as a bulge or V-shaped curve into which a guide element, for example a sliding element, is inserted.
  • the profiling can define the folding edge around which the filter material and the spring are folded. This alignment of the folded edge based on the profiling enables a reproducible positioning of the spring on the vacuum cleaner bag.
  • the spring is preferably folded by two rotatable rollers between which the pre-folded spring is passed.
  • the spring can be plastically deformed during folding in order to prestress the inflow opening into the closed position in the subsequent vacuum cleaner bag.
  • the spring can be designed to be essentially flat and elongate, except for the profiling, before the two legs of the spring are folded onto one another during folding.
  • a folded edge can run parallel to the direction of transport.
  • the web can be pre-folded by guide means, such as sliding elements or rollers, in order then to fold the pre-folded web with the spring.
  • the folding edge can also extend perpendicularly to the longitudinal direction of the web of filter material, so that the web of filter material is then folded together with the spring via a folding station and a blank is separated by a cutting station. The blank is then finished to form the vacuum cleaner bag, in particular by introducing weld seams and cutting to size.
  • the sides that are still open in particular the sides without the pocket with the spring, can be closed by seams to form a bag, for example by gluing or welding.
  • the seams can be essentially linear with or without interruptions.
  • the seam may be in the form of a dashed or dotted line. Seams with two or more parallel linear welding patterns can also be provided. After the seams have been made, excess filter material can be removed, for example by punching or cutting.
  • a transport station for transporting a web of filter material and a feed station for feeding a spring onto the web of filter material.
  • a station is also provided for placing a tape or other web of filter material over the spring to locate the spring in a pocket.
  • the bag can be assembled before laying, during laying or after laying.
  • the device comprises a folding station for folding the web of filter material and the spring arranged in the pocket and a connecting station for connecting the free ends of the pockets opposite a folded edge for forming a hem around an inflow opening of the vacuum cleaner bag.
  • a welding and cutting station is preferably provided behind the folding station in order to make up and separate vacuum cleaner bags from the folded web of filter material and spring.
  • a vacuum cleaner bag comprises two layers of filter material, which surround an interior space and are unconnected at an inflow opening, with a spring being arranged in a seam around the inflow opening and the two layers of filter material being connected to one another on one side via a folded edge, which also extends across the hem, the spring having a fold adjacent the folded edge of the filter material.
  • the folding edge on the filter material and the folding of the spring have preferably been produced in a common process step in order to prestress the hem into a closed position via the spring.
  • the spring is preferably designed as a leaf spring which has two legs which are connected to one another via the fold.
  • the legs can be cambered in order to bring about an optimized prestressing in the closed position.
  • the spring can be made of a thin metal sheet, in particular a metal strip, which is folded in the middle.
  • the vacuum cleaner bag can be essentially rectangular in plan view, with the folded edge preferably being formed on one longitudinal side. The folded edge can then extend beyond the hem, with the inflow opening preferably being narrower than the width of the vacuum cleaner bag.
  • the inflow opening can, for example, only extend in the width direction between 20% to 80%, in particular 30% to 70% of the total width of the vacuum cleaner bag in plan view.
  • the filter material is preferably made of a single- or multi-layer non-woven fabric that can be welded in order to be able to close the vacuum cleaner bag outside of the inflow opening and the folded edge with weld seams.
  • a vacuum cleaner bag 1 comprises two essentially congruent layers 2 made of a filter material, in particular a single-layer or multi-layer non-woven fabric.
  • the two layers 2 surround an interior space which is accessible via an inflow opening 3, the two layers 2 not being connected to one another in the area of the inflow opening.
  • the two layers 2 are connected to one another at a folded edge 4, which is located on a longitudinal side of the vacuum cleaner bag 1, which is essentially rectangular in plan view, and one or more corners can be rounded, as is also shown.
  • the layers 2 are also connected to one another on one end face by a seam 5 and on the side opposite the folded edge 4 by a seam 6, with the seams 5 and 6 being able to be in the form of welded or glued seams.
  • the inflow opening 3 can optionally extend over the entire width of the vacuum cleaner bag 1, but is figure 1 formed narrower and extends only over part of the width of the vacuum cleaner bag 1, in particular over 30% to 70% of the width of the vacuum cleaner bag.
  • the area in the width direction in which no inflow opening 3 is provided is closed by a further seam 7 which is arranged parallel to the seam 5 on the opposite end face.
  • a seam 8 is provided at the inflow opening 3, ie a tubular section in which a spring 10 is arranged.
  • the hem 8 is closed at one end by a seam 9, in particular a welded or glued seam.
  • the hem 8 protrudes from the end face of the vacuum cleaner bag 1, but can also be arranged within the rectangular contour.
  • the seam 7 does not extend over the entire width of the vacuum cleaner bag 1, but only to the seam 9 on the hem 8 in order to be able to create access to the interior of the vacuum cleaner bag 1 at the inflow opening 3.
  • FIG 2 shows the spring 10 in a starting position before being arranged in the hem 8.
  • the spring 10 is designed as a leaf spring and comprises two strip-shaped legs 11 and 12, which can be rounded at the ends in order to avoid damage during processing of the filter material.
  • a profiling 13 in the form of a curvature is provided in a central region, which connects the two legs 11 and 12 to one another in a U or V shape, which essentially extend in one plane.
  • the spring 10 can be made of a strip-shaped metal sheet, preferably with a camber on the legs 11 and 12.
  • FIG. 3a to 3c the manufacturing process for the vacuum cleaner bag 1 is shown schematically.
  • a web 20 of filter material for example a spunbond with an additional layer of meltblown and/or carded fleece and a basis weight between 20 g/m 2 and 100 g/m 2 , is transported in a longitudinal direction of the web 20 at a transport station.
  • a spring 10 is placed on the web 20 of filter material, optionally also with an adhesive, in order to prevent the spring 10 from slipping.
  • a further web 21 of filter material is placed on the web 20 with the springs 10, for example a single-layer or multi-layer non-woven fabric with a layer of spunbond having the above weight per unit area.
  • the composite of the web 20 of filter material formed in this way with the further web 21 of filter material is conveyed to a welding station 30, shown schematically, which has an upper welding bar 31 and a lower welding bar 32 comprises in order to weld the strip-shaped spring 10 to a frame and thus form a pocket 15 in which the spring 10 is arranged in a fixed position between the web 20 and 21 .
  • a welding station 30 shown schematically, which has an upper welding bar 31 and a lower welding bar 32 comprises in order to weld the strip-shaped spring 10 to a frame and thus form a pocket 15 in which the spring 10 is arranged in a fixed position between the web 20 and 21 .
  • rotating welding rollers can also be provided at the welding station.
  • the pockets 15 with the spring 10 arranged at regular intervals are now guided to a folding station in which the initially flat web is arranged in a V-shape via guide elements.
  • corresponding guide elements are provided on the folding station 40, in particular a sword 41, which specifies the position of the subsequent folding edge.
  • the sword 41 is inserted into the profiling 13 so that the spring 10 is arranged in a centered position on the folding station 40 .
  • the web which is folded in a V-shape in cross section, is now fed to rotatable rollers or another bending device in order to fold the pre-folded contour with the spring 10, with the spring 10 being guided through between the rollers in the area of the profile 13 in order to plastically deform the spring 10 and the two legs 11 and 12 fold towards each other.
  • the legs 11 and 12 do not rest directly against one another, but rather over the sheet 20 of filter material.
  • a seam 9 is attached to the free ends of the legs 11 and 12 in order to close the hem 8 formed in this way. Furthermore, a section of the filter material is cut off adjacent to the seam 8, and this cutting off can take place at any point in the manufacturing process, in particular before or after the folding station 40.
  • the vacuum cleaner bag 1 can now be provided with the seams 5, 6 and 7 and then separated for isolation so that the vacuum cleaner bag 1 according figure 1 will be produced.
  • FIG 5 a modified design of the manufacturing process is shown schematically, since an in figure 2 shown spring 10 is applied to a band 25, in particular glued to the band 25 or welded. This band 25 with the springs 10 can be used instead of the one in Figure 3a shown further Web 21 of filter material are fed to the web 20 of filter material.
  • a web 22 of filter material is shown, which has already been partially cut, and a longitudinally projecting portion 23 is formed in regular sections, which later forms at least part of the hem 8.
  • the band 25 is arranged with a spring 10, as in the central region of the figure 6 is shown.
  • the band 25 with the spring 10 is now connected to the portion 23, in particular by welding or gluing, to form a pocket 15'.
  • the filter material of the web 22 is folded along the axis 24 and welded together at the seams 5, 6, 7 and 9 to form a vacuum cleaner bag 1 according to figure 1 to manufacture.
  • Such a vacuum cleaner bag 1 is therefore only double-layered in the region of the hem 8 .
  • FIG 7 a further embodiment for the manufacturing process is shown, in which a band 26 is provided on which individual springs 10 are placed, which in figure 2 are shown.
  • the strip-shaped springs 10 are laid loosely on the band 26 or optionally fixed with adhesive, the band 26 then being folded and welded so that each spring 10 is placed in a pocket 27 .
  • the pocket 27 thus formed with the spring 10 is now in accordance with figure 8 fed to a web 22' made of filter material, with only one connecting portion 23' being provided which is shorter than portion 23' in figure 6 .
  • the pocket 27 with the spring 10 is now fixed to the connecting section 23', in particular via a weld seam 28, so that the sheet 22' of filter material and the pocket 27 with the spring form a unit.
  • the panel 22' is then folded along the axes 24 to fold the spring 10 centrally with the panel 22' and produce a vacuum cleaner bag 1 as shown in FIG figure 1 is shown.
  • FIG 9 Another method for producing a vacuum cleaner bag 1 is shown.
  • a web 20 of filter material in particular a single- or multi-layer non-woven fabric, is conveyed from left to right, and in a first step a strip-shaped spring 10 is positioned on web 20 .
  • the web 20 is moved together with the spring 10 to a folding station 70 to place an edge 16 of the web 20 on the filter material and thus a Folding edge 14 to produce.
  • the spring 10 is thus surrounded by the filter material behind the folding station 17 .
  • a welding device 18 is used next to the spring 10 in order to produce a weld seam 50 parallel to the longitudinal direction of the web 20.
  • the welding device 18 can comprise, for example, a roller or roller with a welding surface in order to produce the weld seam 50 .
  • a further weld seam 51 is produced via welding devices 19 on opposite end faces of the spring 10 so that the spring 10 is arranged in a pocket 52 which is formed by a section of the folded edge 14, the weld seam 50 and the weld seams 51.
  • the weld seams 50 and 51 can also be produced using a single rotary or cyclic welding tool, which fixes the two layers to one another after the web 20 has been folded.
  • a holding device 35 by means of which the spring 10 is held on the web 20 of filter material.
  • the holding device 35 can, for example, comprise a magnet, by means of which the spring 10 is fixed on the web 20 and which ensures that the spring 10 does not move relative to the web 20 but is moved along with the web.
  • the holding device 35 can include a magnet, for example, which is moved together with the spring 10 through the folding station 17 to at least one welding device 18 or 19 in order to ensure exact positioning of the spring 10 when the pocket 52 is produced.
  • FIG 10 A folding station is shown in which the web 20 with pocket 52 and spring 10 is processed.
  • the web 20 is conveyed to the folding station, where a pivotable folding element 45 is provided, as shown schematically by the arrow.
  • the web 20 is folded perpendicularly to the longitudinal direction about a folding edge 4 via the folding element 45, so that a first layer 2 is folded onto a second layer 2'.
  • the spring 10 is bent, as has already been described above.
  • the layers 2 and 2' are now separated from the web 20 by a schematically illustrated cutting device 48 and conveyed further in an isolated arrangement via conveyor belts 46 and 47 and fed to a welding station. In the welding station, further seams for assembling the vacuum cleaner bag 1 can be produced.
  • figure 11 1 shows a blank 60 for producing the vacuum cleaner bag 1, in which the two congruent layers 2 and 2' are arranged one on top of the other and are formed integrally with one another via a folded edge 4. The layers 2 and 2' are also fixed to one another via the seam 5 and the seam 6.
  • FIG. The spring 10 has been bent over by the folding station and is still in the pocket 52 defined by the welds 50 and 51.
  • the vacuum cleaner bag 1 can now be manufactured from this blank 60, as shown in figure 1 is shown.
  • the rounded corners can also be dispensed with.
  • folding stations can also be used, for example via folding stations with a rotary table, in order then to separate individual folded blanks 60 from the web 20 and to introduce weld seams.
  • FIG 12 shows a blank 60 for manufacturing a vacuum cleaner bag 1, as shown in figure 1 is shown.
  • the blank 60 consists of a single or multi-layer filter material and has a shape like the vacuum cleaner bag of FIG. Fold edge 4 is in figure 12 shown with dashed lines, since this will only be introduced later.
  • the blank 60 comprises an essentially rectangular projection 63, which is formed from two strips 63a and 63b.
  • a spring 10 is placed on the strip 63b as a leaf spring.
  • the protruding strip 63a is then folded over onto the spring 10 so that the spring 10 is accommodated in a pocket formed by the strips 63a and 63b.
  • the pocket formed in this way can then be closed, for example by gluing or welding the filter material in the region of the free end of the strip 63a which rests on the filter material of the blank 60.
  • the blank 60 can then be folded around the folded edge 4, so that the spring 10 is also folded in the pocket, with the strips 63a and 63b being fixed to one another, so that the vacuum cleaner bag has the in figure 1 configuration shown.
  • the section of the blank 60 is formed so that the projection 63 is formed integrally with the filter material. It is of course also possible to manufacture the pocket for receiving the spring 10 separately and to attach it to the filter material, or to manufacture only one layer of the pocket separately and then to attach it to the filter material attach.
  • a rotary indexer can be used, for example, which successively produces one seam or several seams on the vacuum cleaner bag, in particular by welding.
  • the blank 60 can optionally be made by stamping or cutting a filter material.
  • the blank 60 can also hang on a web of material during the folding and can be severed before or after the folding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
EP22202661.9A 2021-11-16 2022-10-20 Procédé et dispositif de fabrication d'un sac d'aspirateur et sac d'aspirateur Pending EP4197773A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021129903.9A DE102021129903A1 (de) 2021-11-16 2021-11-16 Verfahren und Vorrichtung zum Herstellen eines Staubsaugerbeutels und Staubsaugerbeutel

Publications (1)

Publication Number Publication Date
EP4197773A1 true EP4197773A1 (fr) 2023-06-21

Family

ID=83900184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22202661.9A Pending EP4197773A1 (fr) 2021-11-16 2022-10-20 Procédé et dispositif de fabrication d'un sac d'aspirateur et sac d'aspirateur

Country Status (2)

Country Link
EP (1) EP4197773A1 (fr)
DE (1) DE102021129903A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999000312A1 (fr) * 1997-06-30 1999-01-07 Arthur D. Little Enterprises, Inc. Systeme de fermeture pour conteneur souple et procede et appareil permettant de produire ce dernier
US20030009858A1 (en) * 2001-07-11 2003-01-16 Goldberg Mark H. Bag closure system
WO2020164960A1 (fr) * 2019-02-15 2020-08-20 Wolf Pvg Gmbh & Co. Kg Sac d'aspirateur et aspirateur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019105816U1 (de) 2019-02-15 2019-11-05 Wolf Pvg Gmbh & Co. Kg Staubsaugerbeutel und Staubsauger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999000312A1 (fr) * 1997-06-30 1999-01-07 Arthur D. Little Enterprises, Inc. Systeme de fermeture pour conteneur souple et procede et appareil permettant de produire ce dernier
US20030009858A1 (en) * 2001-07-11 2003-01-16 Goldberg Mark H. Bag closure system
WO2020164960A1 (fr) * 2019-02-15 2020-08-20 Wolf Pvg Gmbh & Co. Kg Sac d'aspirateur et aspirateur
DE102019103908A1 (de) 2019-02-15 2020-08-20 Wolf Pvg Gmbh & Co. Kommanditgesellschaft Staubsaugerbeutel und Staubsauger

Also Published As

Publication number Publication date
DE102021129903A1 (de) 2023-05-17

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