EP4197773A1 - Method and device for producing a vacuum cleaner bag and vacuum cleaner bag - Google Patents
Method and device for producing a vacuum cleaner bag and vacuum cleaner bag Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 27
- 238000003466 welding Methods 0.000 claims description 26
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 3
- 238000005304 joining Methods 0.000 claims 1
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010040954 Skin wrinkling Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
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- 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
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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
-
- 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
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- 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)
Abstract
Bei einem Verfahren zum Herstellen eines Staubsaugerbeutels wird eine Feder (10) bereitgestellt, die zu einer Bahn (20) aus Filtermaterial zugeführt wird, wobei ein Band oder eine weitere Bahn aus Filtermaterial aufgelegt wird, um die Feder (10) in einer Tasche anzuordnen. Die Bahn (20) aus Filtermaterial und die in der Tasche angeordnete Feder (10) werden dann gefaltet, um dann die Tasche an den freien Enden der Feder (10) zu verbinden, um dann einen Staubsaugerbeutel (1) mit einem Saum (8) um eine Einströmöffnung (3) fertigzustellen. Ferner wird eine Vorrichtung zum Herstellen eines Staubsaugerbeutels (1) und ein solcher Staubsaugerbeutel (1) bereitgestellt.In a method of manufacturing a vacuum cleaner bag, a spring (10) is provided which is fed to a web (20) of filter material, with a tape or further web of filter material being laid up to place the spring (10) in a pocket. The sheet (20) of filter material and the spring (10) placed in the pocket are then folded to then connect the pocket at the free ends of the spring (10) to then form a vacuum cleaner bag (1) with a seam (8). to finish an inflow opening (3). Furthermore, a device for producing a vacuum cleaner bag (1) and such a vacuum cleaner bag (1) is provided.
Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen eines Staubsaugerbeutels sowie einen Staubsaugerbeutel mit zwei Lagen aus Filtermaterial, die einen Innenraum umgeben und an einer Einströmöffnung unverbunden sind, wobei um die Einströmöffnung eine Feder in einem Saum angeordnet ist.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.
Die
Es ist daher Aufgabe der vorliegenden Erfindung, Ein Verfahren und eine Vorrichtung zum Herstellen eines Staubsaugerbeutels sowie einen Staubsaugerbeutel bereitzustellen, die eine effektive Herstellung eines Staubsaugerbeutels auch in überwiegend automatisierten Verfahren ermöglichen.It is therefore the object of the present invention to provide a method and a device for producing a vacuum cleaner bag and a vacuum cleaner bag which also enable effective production of a vacuum cleaner bag in predominantly automated methods.
Diese Aufgabe wird mit einem Verfahren mit den Merkmalen des Anspruches 1, einer Vorrichtung mit den Merkmalen des Anspruches 10 und einem Staubsaugerbeutel mit den Merkmalen des Anspruches 12 gelöst.This object is achieved with a method having the features of
Bei dem erfindungsgemäßen Verfahren wird eine Feder bereitgestellt, die zu einer Bahn aus Filtermaterial zugeführt wird. Auf die Bahn aus Filtermaterial wird ein Band oder eine weitere separat hergestellte oder integral ausgebildete Bahn aus Filtermaterial aufgelegt, wobei die Feder auf der Bahn aus Filtermaterial liegt oder über die weitere Bahn aus Filtermaterial oder das Band zugeführt wird. Die Feder wird somit in einer Tasche angeordnet, die vorzugsweise durch einen geschlossenen Innenraum ausgebildet ist, um dann die Bahn aus Filtermaterial und die Tasche, in der die Feder angeordnet ist, zu falten. Anschließend wird die Taschen an den freien Enden der Feder verbunden, um dann einen Staubsaugerbeutel mit einem Saum und einer Feder um eine Einströmöffnung fertigzustellen. Dadurch kann die Konfektionierung des Staubsaugerbeutels effektiv erfolgen, da beim Falten sowohl die Bahn aus Filtermaterial als auch die Feder gefaltet wird, die dann später in dem Saum um eine Einströmöffnung des Staubsaugerbeutels angeordnet ist und diesen in eine geschlossene Position vorspannt.In the method of the present invention, 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. As a result, 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.
Vorzugsweise ist die Feder als längliche Blattfeder ausgebildet, insbesondere aus Metall, die senkrecht zu ihrer Längsrichtung gefaltet wird. Dann umgibt die gefaltete Blattfeder die Einströmöffnung an dem Staubsaugerbeutel.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.
Die Tasche für die Feder kann durch Verschweißen oder Verkleben der Bahn aus Filtermaterial entlang von Nähten, insbesondere Schweiß- oder Klebenähten, mit dem Band oder der weiteren Bahn aus Filtermaterial erfolgen. Die weitere Bahn aus Filtermaterial kann dabei integral mit der Bahn aus Filtermaterial zur Herstellung des Staubsaugerbeutels ausgebildet sein oder als separate Bahn zugeführt werden, um eine Tasche auszubilden. Dadurch wird die Bahn aus Filtermaterial mit der Tasche zusammenhängend ausgebildet, was für eine automatisierte Fertigung vorteilhaft ist, um die Bahn aus Filtermaterial mit der in der Tasche angeordneten Feder weiterzuverarbeiten.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. As a result, 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.
Die Feder weist vorzugsweise eine Profilierung auf, die zum Ausrichten der Feder beim Falten der Feder und der Bahn aus Filtermaterial dient. Die Profilierung kann beispielsweise als Wölbung oder V-förmige Krümmung ausgebildet sein, in die ein Führungselement, beispielsweise ein Gleitelement, eingeführt wird. Dadurch kann die Profilierung die Faltkante definieren, um die eine Faltung des Filtermaterials und der Feder vorgenommen wird. Diese Ausrichtung der Faltkante anhand der Profilierung ermöglicht eine reproduzierbare Positionierung der Feder an dem Staubsaugerbeutel.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. As a result, 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.
Das Falten der Feder erfolgt vorzugsweise durch zwei drehbare Walzen, zwischen denen die vorgefaltete Feder durchgeführt wird. Dadurch kann die Feder beim Falten plastisch verformt werden, um beim späteren Staubsaugerbeutel die Einströmöffnung in die geschlossene Position vorzuspannen. Dabei kann die Feder beim Zuführen bis auf die Profilierung im Wesentlichen flach und länglich ausgebildet sein, bevor die beiden Schenkel der Feder beim Falten aufeinander geklappt angeordnet sind.The spring is preferably folded by two rotatable rollers between which the pre-folded spring is passed. As a result, 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.
Für eine effektive Fertigung kann beim Falten der Bahn aus Filtermaterial eine Faltkante parallel zur Transportrichtung verlaufen. Dadurch kann durch Führungsmittel, wie Gleitelemente oder Rollen, eine Vorfaltung der Bahn vorgenommen werden, um dann die vorgefaltete Bahn mit der Feder zu falten. Alternativ kann sich die Faltkante auch senkrecht zur Längsrichtung der Bahn aus Filtermaterial erstrecken, so dass dann über eine Faltstation die Bahn auf Filtermaterial zusammen mit der Feder gefaltet und durch eine Schneidstation ein Rohling vereinzelt wird. Der Rohling wird dann zu dem Staubsaugerbeutel fertig konfektioniert, insbesondere durch Einbringen von Schweißnähten und Zuschneiden.For effective production, when the web of filter material is folded, a folded edge can run parallel to the direction of transport. As a result, 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. Alternatively, 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.
Beim Schritt des Fertigstellens des Staubsaugerbeutels können die noch offenen Seiten, insbesondere die Seiten ohne die Tasche mit der Feder, durch Nähte zur Ausbildung eines Beutels geschlossen werden, beispielsweise durch Kleben oder Schweißen. Die Nähte können im Wesentlichen linienförmig mit oder ohne Unterbrechungen ausgebildet sein. Die Naht kann in Form einer gestrichelten oder gepunkteten Linie ausgebildet sein. Auch Nähte mit zwei oder mehr parallelen linienförmigen Schweißmusters können vorgesehen werden. Nach dem Herstellen der Nähte kann ein überständiges Filtermaterial entfernt werden, beispielsweise durch Stanzen oder Schneiden.In the step of completing the vacuum cleaner bag, 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.
Bei der erfindungsgemäßen Vorrichtung zum Herstellen eines Staubsaugerbeutels ist eine Transportstation zum Transportieren einer Bahn aus Filtermaterial vorgesehen und eine Zuführstation zum Zuführen einer Feder auf die Bahn aus Filtermaterial. Fener ist eine Station zum Auflegen eines Bandes oder einer weiteren Bahn aus Filtermaterial auf die Feder vorgesehen, um die Feder in einer Tasche anzuordnen. Die Tasche kann dabei vor dem Auflegen konfektioniert werden, während des Auflegens oder nach dem Auflegen. Ferner umfasst die Vorrichtung eine Faltstation zum Falten der Bahn aus Filtermaterial und die in der Tasche angeordnete Feder und eine Verbindungsstation zum Verbinden der freien Enden der Taschen gegenüber einer Faltkante zum Ausbilden eines Saums um eine Einströmöffnung des Staubsaugerbeutels. Durch das gemeinsame Falten der Bahn aus Filtermaterial mit der Feder lässt sich der Staubsaugerbeutel effektiv und mit einem hohen Maß an Automatisierung herstellen.In the device according to the invention for manufacturing a vacuum cleaner bag, a transport station is provided 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. Furthermore, 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. By folding the web of filter material together with the spring, the vacuum cleaner bag can be produced effectively and with a high degree of automation.
Vorzugsweise ist eine Schweiß- und Schneidstation hinter der Faltstation vorgesehen, um aus der gefalteten Bahn aus Filtermaterial und Feder Staubsaugerbeutel zu konfektionieren und zu vereinzeln.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.
Ein erfindungsgemäßer Staubsaugerbeutel umfasst zwei Lagen aus Filtermaterial, die einen Innenraum umgeben und an einer Einströmöffnung unverbunden sind, wobei um die Einströmöffnung eine Feder in einem Saum angeordnet ist und die zwei Lagen aus Filtermaterial an einer Seite über eine Faltkante miteinander verbunden sind, die sich auch über den Saum erstreckt, wobei die Feder benachbart zu der Faltkante des Filtermaterials eine Faltung aufweist. Dabei sind die Faltkante an dem Filtermaterial und die Faltung der Feder bevorzugt in einem gemeinsamen Verfahrensschritt hergestellt worden, um den Saum über die Feder in eine geschlossene Position vorzuspannen.A vacuum cleaner bag according to the invention 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.
Die Feder ist vorzugsweise als Blattfeder ausgebildet, die zwei Schenkel aufweist, die über die Faltung miteinander verbunden sind. Die Schenkel können dabei bombiert ausgebildet sein, um eine optimierte Vorspannung in die Schließposition zu bewirken. Die Feder kann aus einem dünnen Metallblech hergestellt sein, insbesondere einem Metallstreifen, der mittig gefaltet ist.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.
Der Staubsaugerbeutel kann in Draufsicht im Wesentlichen rechteckförmig ausgebildet sein, wobei die Faltkante bevorzugt an einer Längsseite ausgebildet ist. Die Faltkante kann sich dann bis über den Saum erstrecken, wobei die Einströmöffnung bevorzugt schmaler ausgebildet ist als die Breite des Staubsaugerbeutels. Die Einströmöffnung kann beispielsweise nur eine Erstreckung in Breitenrichtung zwischen 20 % bis 80 %, insbesondere 30 % bis 70 % der Gesamtbreite des Staubsaugerbeutels in Draufsicht aufweisen.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.
Das Filtermaterial ist vorzugsweise aus einem ein- oder mehrlagigen Vliesstoff hergestellt, der verschweißbar ist, um den Staubsaugerbeutel außerhalb der Einströmöffnung und der Faltkante durch Schweißnähte verschließen zu können.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.
Die Erfindung wird nachfolgend anhand mehrerer Ausführungsbeispiele mit Bezug auf die beigefügten Zeichnungen näher erläutert. Es zeigen:
Figur 1- eine Ansicht eines erfindungsgemäßen Staubsaugerbeutels;
Figur 2- eine Ansicht einer Feder für den Staubsaugerbeutel der
;Figur 1 - Figur 3a bis 3c
- mehrere schematische Ansichten zum Herstellungsverfahren für den Staubsaugerbeutel;
Figur 4- einer Ansicht vorkonfektionierter Staubsaugerbeutel nach dem Falten;
Figur 5- eine Ansicht beim Fixieren von Federn an einem Band;
Figur 6- eine Ansicht zu einem modifizierten Verfahren zum Herstellen von Staubsaugerbeuteln mit dem Band der
;Figur 5 Figur 7- eine Ansicht zum Herstellen eines Bandes mit Federn;
Figur 8- eine Ansicht zum Herstellungsverfahren mit dem Band der
;Figur 7 Figur 9- eine schematische Ansicht eines weiteren Herstellungsverfahrens für einen Staubsaugerbeutel;
Figur 10- eine Ansicht einer Faltstation;
Figur 11- eine Ansicht eines Rohlings für einen Staubsaugerbeutel, und
Figur 12- eine Ansicht eines Rohlings zur Herstellung eines Staubsaugerbeutels.
- figure 1
- a view of a vacuum cleaner bag according to the invention;
- figure 2
- a view of a spring for the vacuum cleaner bag
figure 1 ; - Figure 3a to 3c
- several schematic views of the manufacturing process for the vacuum cleaner bag;
- figure 4
- a view of pre-made vacuum cleaner bags after folding;
- figure 5
- a view of fixing springs on a band;
- figure 6
- a view of a modified method for manufacturing vacuum cleaner bags with the band of
figure 5 ; - figure 7
- a view of making a tape with springs;
- figure 8
- a view of the manufacturing process with the band of
figure 7 ; - figure 9
- a schematic view of another manufacturing method for a vacuum cleaner bag;
- figure 10
- a view of a folding station;
- figure 11
- a view of a blank for a vacuum cleaner bag, and
- figure 12
- a view of a blank for the production of a vacuum cleaner bag.
Ein Staubsaugerbeutel 1 umfasst zwei im Wesentlichen deckungsgleiche Lagen 2 aus einem Filtermaterial, insbesondere aus einem ein- oder mehrlagigen Vliesstoff. Die beiden Lagen 2 umgeben einen Innenraum, der über eine Einströmöffnung 3 zugänglich ist, wobei die beiden Lagen 2 im Bereich der Einströmöffnung nicht miteinander verbunden sind.A vacuum
Die beiden Lagen 2 sind an einer Faltkante 4 miteinander verbunden, die sich an einer Längsseite des in Draufsicht im Wesentlichen rechteckigen Staubsaugerbeutels 1 befindet, wobei an einer oder mehreren Ecken eine Abrundung vorgesehen sein kann, wie dies auch dargestellt ist. Die Lagen 2 sind ferner an einer Stirnseite über eine Naht 5 und auf der Faltkante 4 gegenüberliegenden Seite über eine Naht 6 miteinander verbunden, wobei die Nähte 5 und 6 als Schweiß- oder Klebenaht ausgebildet sein können.The two
Die Einströmöffnung 3 kann sich optional über die gesamte Breite des Staubsaugerbeutels 1 erstrecken, ist aber in
An der Einströmöffnung 3 ist ein Saum 8 vorgesehen, also ein schlauchförmiger Abschnitt, in dem eine Feder 10 angeordnet ist. Der Saum 8 ist dabei an einem Ende durch eine Naht 9 verschlossen, insbesondere eine Schweiß- oder Klebenaht. Der Saum 8 steht dabei von der Stirnseite des Staubsaugerbeutels 1 hervor, kann jedoch auch innerhalb der rechteckigen Kontur angeordnet sein. Die Naht 7 erstreckt sich dabei nicht über die gesamte Breite des Staubsaugerbeutels 1, sondern nur zu der Naht 9 an dem Saum 8, um an der Einströmöffnung 3 einen Zugang zu dem Innenraum des Staubsaugerbeutels 1 schaffen zu können.A
In
Der so gebildete Verbund der Bahn 20 aus Filtermaterial mit der weiteren Bahn 21 aus Filtermaterial wird zu einer schematisch dargestellten Schweißstation 30 gefördert, die einen oberen Schweißbalken 31 und einen unteren Schweißbalken 32 umfasst, um die streifenförmige Feder 10 mit einem Rahmen zu verschweißen und so eine Tasche 15 auszubilden, in der die Feder 10 zwischen der Bahn 20 und 21 lagefixiert angeordnet ist. Statt der Schweißbalken 31 und 32 können auch sich drehende Schweißwalzen an der Schweißstation vorgesehen sein.The composite of the
Die in regelmäßigen Abständen angeordneten Taschen 15 mit der Feder 10 werden nun zu einer Faltstation geführt, in der die zunächst flache Bahn über Führungselemente V-förmig angeordnet wird. Hierfür sind entsprechende Führungselemente an der Faltstation 40 vorgesehen, insbesondere ein Schwert 41, das die Position der späteren Faltkante vorgibt. Das Schwert 41 wird dabei in die Profilierung 13 eingeführt, so dass die Feder 10 lagezentriert an der Faltstation 40 angeordnet ist. Die im Querschnitt V-förmig gefaltete Bahn wird nun drehbaren Walzen oder einer anderen Biegeeinrichtung zugeführt, um die vorgefaltete Kontur mit der Feder 10 falten, wobei die Feder 10 im Bereich der Profilierung 13 zwischen den Walzen durchgeführt wird, um die Feder 10 plastisch zu verformen und die beiden Schenkel 11 und 12 aufeinander zu klappen. Die Schenkel 11 und 12 liegen nicht unmittelbar aneinander auf, sondern über die Bahn 20 aus Filtermaterial.The
In
In einem nächsten Schritt wird an den freien Enden der Schenkel 11 und 12 eine Naht 9 angebracht, um den so gebildeten Saum 8 zu verschließen. Ferner wird benachbart zu dem Saum 8 ein Abschnitt des Filtermaterials abgetrennt, wobei dieses Abtrennen an einer beliebigen Stelle des Herstellungsverfahrens erfolgen kann, insbesondere vor oder nach der Faltstation 40.In a next step, a
Die Staubsaugerbeutel 1 können nun noch mit den Nähten 5, 6 und 7 versehen werden und dann zur Vereinzelung abgetrennt werden, damit der Staubsaugerbeutel 1 gemäß
In
In
In
Anschließend wird die Bahn 22' entlang der Achsen 24 gefaltet, um die Feder 10 mittig mit der Bahn 22' zu falten und einen Staubsaugerbeutel 1 herzustellen, wie er in
In
In einem nächsten Schritt wird eine Schweißvorrichtung 18 neben der Feder 10 eingesetzt, um eine Schweißnaht 50 parallel zur Längsrichtung der Bahn 20 herzustellen. Die Schweißvorrichtung 18 kann beispielsweise eine Rolle oder Walze mit einer Schweißfläche umfassen, um die Schweißnaht 50 herzustellen. Ferner wird über Schweißvorrichtungen 19 an gegenüberliegenden Stirnseiten der Feder 10 jeweils eine weitere Schweißnaht 51 hergestellt, so dass die Feder 10 in einer Tasche 52 angeordnet ist, die durch einen Abschnitt der Faltkante 14, die Schweißnaht 50 und die Schweißnähte 51 gebildet wird. Optional können die Schweißnähte 50 und 51 auch über ein einziges rotatives oder taktweise arbeitendes Schweißwerkzeug hergestellt werden, das die beiden Lagen nach dem Falten der Bahn 20 aneinander fixiert.In a next step, a
Im Bereich der Faltstation 17 ist ferner noch eine Haltevorrichtung 35 vorgesehen, mittels der die Feder 10 auf der Bahn 20 aus Filtermaterial gehalten wird. Die Haltevorrichtung 35 kann beispielsweise einen Magneten umfassen, mittels dem die Feder 10 auf der Bahn 20 fixiert wird und die dafür sorgt, dass die Feder 10 sich nicht relativ zu der Bahn 20 bewegt, sondern mit der Bahn mitbewegt wird. Die Haltevorrichtung 35 kann beispielsweise einen Magneten umfassen, der zusammen mit der Feder 10 durch die Faltstation 17 bis zu mindestens einer Schweißvorrichtung 18 oder 19 bewegt wird, um eine exakte Positionierung der Feder 10 beim Herstellen der Tasche 52 zu gewährleisten.Also provided in the area of the
In
In
Statt der in
Bei dem in
Der Rohling 60 kann wahlweise durch Stanzen oder Schneiden eines Filtermaterials hergestellt sein. Optional kann der Rohling 60 bei der Faltung auch noch an einer Materialbahn hängen und vor oder nach der Faltung abgetrennt werden.The blank 60 can optionally be made by stamping or cutting a filter material. Optionally, the blank 60 can also hang on a web of material during the folding and can be severed before or after the folding.
- 11
- Staubsaugerbeutelvacuum cleaner bags
- 2, 2'2, 2'
- LagePosition
- 33
- Einströmöffnunginflow opening
- 44
- Faltkantefolding edge
- 55
- Nahtseam
- 66
- Nahtseam
- 77
- Nahtseam
- 88th
- Saumhem
- 99
- Nahtseam
- 1010
- FederFeather
- 1111
- Schenkelleg
- 1212
- Schenkelleg
- 1313
- Profilierungprofiling
- 1414
- Faltkantefolding edge
- 15, 15'15, 15'
- TascheBag
- 1616
- Kanteedge
- 1717
- Faltstationfolding station
- 1818
- Schweißvorrichtungwelding device
- 1919
- Schweißvorrichtungwelding device
- 2020
- BahnRail
- 2121
- BahnRail
- 22,22'22,22'
- BahnRail
- 2323
- AbschnittSection
- 23'23'
- Verbindungsabschnittconnection section
- 2424
- Achseaxis
- 2525
- Bandtape
- 2626
- Bandtape
- 2727
- TascheBag
- 2828
- SchweißnahtWeld
- 3030
- Schweißstationwelding station
- 3131
- Schweißbalkensealing bar
- 3232
- Schweißbalkensealing bar
- 3535
- Haltevorrichtungholding device
- 4040
- Faltstationfolding station
- 4141
- Schwertsword
- 4545
- Klappelementfolding element
- 4646
- Förderbandconveyor belt
- 4747
- Förderbandconveyor belt
- 4848
- Schneidvorrichtungcutting device
- 5050
- SchweißnahtWeld
- 5151
- SchweißnahtWeld
- 5252
- TascheBag
- 6060
- Rohlingblank
- 7070
- Faltstationfolding station
Claims (16)
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DE102021129903.9A DE102021129903A1 (en) | 2021-11-16 | 2021-11-16 | Method and device for manufacturing a vacuum cleaner bag and vacuum cleaner bag |
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EP4197773A1 true EP4197773A1 (en) | 2023-06-21 |
Family
ID=83900184
Family Applications (1)
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EP22202661.9A Pending EP4197773A1 (en) | 2021-11-16 | 2022-10-20 | Method and device for producing a vacuum cleaner bag and vacuum cleaner bag |
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EP (1) | EP4197773A1 (en) |
DE (1) | DE102021129903A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999000312A1 (en) * | 1997-06-30 | 1999-01-07 | Arthur D. Little Enterprises, Inc. | Closure system for pliable container and method and apparatus for producing the same |
US20030009858A1 (en) * | 2001-07-11 | 2003-01-16 | Goldberg Mark H. | Bag closure system |
DE102019103908A1 (en) | 2019-02-15 | 2020-08-20 | Wolf Pvg Gmbh & Co. Kommanditgesellschaft | Vacuum cleaner bags and vacuum cleaners |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE202019105816U1 (en) | 2019-02-15 | 2019-11-05 | Wolf Pvg Gmbh & Co. Kg | Vacuum cleaner bag and vacuum cleaner |
-
2021
- 2021-11-16 DE DE102021129903.9A patent/DE102021129903A1/en active Pending
-
2022
- 2022-10-20 EP EP22202661.9A patent/EP4197773A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999000312A1 (en) * | 1997-06-30 | 1999-01-07 | Arthur D. Little Enterprises, Inc. | Closure system for pliable container and method and apparatus for producing the same |
US20030009858A1 (en) * | 2001-07-11 | 2003-01-16 | Goldberg Mark H. | Bag closure system |
DE102019103908A1 (en) | 2019-02-15 | 2020-08-20 | Wolf Pvg Gmbh & Co. Kommanditgesellschaft | Vacuum cleaner bags and vacuum cleaners |
WO2020164960A1 (en) * | 2019-02-15 | 2020-08-20 | Wolf Pvg Gmbh & Co. Kg | Vacuum cleaner bag and vacuum cleaner |
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