EP4364625A1 - Vacuum cleaner bag and method for producing a vacuum cleaner bag - Google Patents

Abstract

A vacuum cleaner bag (1, 1') comprises two bag walls (2, 3) made of filter material, which enclose an interior space, wherein at least one fold (4, 4', 5, 5') is provided on each bag wall (2, 3), which is fixed on one side by a seam (6, 6', 7, 7'), wherein an inflow opening (11) is formed on the side with the seams (6, 6', 7, 7') for fixing the at least one fold (4, 4', 5, 5'), and the bag walls (2, 3) are connected to one another on two opposite sides by side seams (9), wherein the bag walls (2, 3) are connected to one another on the side opposite the inflow opening (11) via a folding edge (8). The invention further relates to an effective method for producing such a vacuum cleaner bag (1, 1').

Description

The present invention relates to a vacuum cleaner bag with two bag walls made of filter material which enclose an interior space, wherein at least one fold is provided on each bag wall which is fixed on one side by a seam, wherein an inflow opening is formed on the side with the seams for fixing the at least one fold, and the bag walls are connected to one another on two opposite sides by side seams, and to a method for producing such a vacuum cleaner bag.

In the EN 20 2019 105 816 U1 A vacuum cleaner bag is disclosed which comprises two layers of filter material which are connected to one another via a seam on two long sides and one narrow side. On the fourth side, an inflow opening is formed between the layers, the inflow opening being pre-tensioned into a closed position by a spring. Such vacuum cleaner bags have proven particularly useful for tubular chambers in vacuum cleaners. However, the capacity of the interior of such a vacuum cleaner bag is limited.

The EP 3 821 776 A1 discloses a vacuum cleaner filter bag made of filter material that is welded on three sides. A surface fold can be provided on the bag wall, but this can only be unfolded in a central area of the bag wall and contributes little to the increase in volume during use.

It is therefore the object of the present invention to provide a vacuum cleaner bag and a method for producing a vacuum cleaner bag which has an improved absorption volume and can be produced effectively.

To solve this problem, the invention provides a vacuum cleaner bag with the features of claim 1 and a method for producing a vacuum cleaner bag with the features of claim 12.

In the vacuum cleaner bag according to the invention, an interior is enclosed by two bag walls made of filter material, with at least one fold being provided on each bag wall, which is fixed by a seam on one side, with an inflow opening being formed on the side of the vacuum cleaner bag with the seams for fixing the at least one fold. Furthermore, the two bag walls are connected to one another on two opposite sides by side seams. The bag walls are connected to one another on the side opposite the inflow opening via a folding edge, so that the bag walls are integrally formed with one another via the folding edge, whereby the vacuum cleaner bag can be produced effectively. In addition, fixing of the at least one fold can be dispensed with in the area of the folding edge, so that the volume of the interior can better adapt to a chamber of the vacuum cleaner.

Preferably, the at least one fold can be at least partially unfolded in the area of the folding edge during use. This allows the vacuum cleaner bag to be packed with a small volume for transport, whereby after the vacuum cleaner bag has been inserted, it can expand due to negative pressure on the side opposite the inlet opening; optionally, the at least one fold can be unfolded completely. This increases the usable volume of the interior of the vacuum cleaner bag during use.

For particularly effective production, the vacuum cleaner bag can be made in one piece, i.e. it can consist of a cut piece of material, which can then optionally be detachably connected to a nozzle of a vacuum cleaner or fixed to a holding plate. Apart from such mechanical fastening means for the vacuum cleaner bag, it is made in one piece from a cut piece of filter material, in particular from a single or multi-layer nonwoven fabric.

For a compact design, the side seams are preferably aligned parallel to the at least one fold. This allows a substantially bulbous shape to be obtained when the fold is unfolded, which makes optimal use of the volume in a chamber of a vacuum cleaner. Two, three or four folds can be provided on each bag wall in order to increase the volume during use.

The seam for fixing the at least one fold can optionally only be provided in the double-layer section of the filter material. In this case, During production, only the section of the filter material that is placed on top of one another is fixed by the seam, while the single-layer area remains without a seam or, optionally, a holding plate is provided with a seam for fixing. Alternatively, the seam for fixing the at least one fold can also extend across the entire width of the vacuum cleaner bag. The seam can be formed by a continuous line or by individual points that are welded or glued together.

In a preferred embodiment, a section of an outer fold adjacent to the side seam is arranged on each bag wall facing the interior, while a middle section of the bag wall on the respective outer fold is arranged on the outside in relation to the interior. As a result, Z-shaped folds are formed adjacent to the side seam, whereby the arrangement of the two outer folds can be symmetrical in order to obtain an optimized shape of the vacuum cleaner bag during use. Alternatively, a fold can also be provided on the bag wall in which a section facing a first side seam is arranged on the outside and a section facing the second side seam is arranged on the inside.

The vacuum cleaner bag is preferably rectangular in plan view, with the side seams arranged on opposite long sides. The extension of the vacuum cleaner bag in the longitudinal direction is preferably at least twice as long as perpendicular to it in relation to the folded-in position. The inflow opening is then provided on a first narrow side and the folding edge on the opposite second narrow side.

The filter material of the vacuum cleaner bag is preferably made of a single or multi-layer nonwoven fabric that contains a thermoplastic. The seams and/or side seams can therefore be designed as welded seams so that the filter material can be easily processed.

The bag walls can be designed symmetrically to a central plane parallel to the side seams, in particular mirror-symmetrically. This simplifies handling, as the vacuum cleaner bag can also be mounted rotated by 180°.

In the method according to the invention, a web or a blank made of filter material is first fed to a folding station in order to then introduce at least one fold into the filter material by laying the filter material on top of one another. This at least one fold is then fixed by two spaced seams so that the two seams can then be placed on top of one another by folding the filter material over and creating a folded edge. Two spaced side seams can then be produced, connecting the folded edge to the opposite side with the seams, with an inflow opening remaining between the bag walls on the side with the seams. This makes it possible to effectively produce a vacuum cleaner bag from a web or a blank that has a compact shape for transport and can adapt optimally to the contour of a vacuum cleaner chamber during use.

Preferably, the two spaced seams are each produced perpendicular to the longitudinal direction of the at least one fold. The at least one fold is aligned parallel to the longitudinal direction and preferably not fixed to the folding edge, so that it can at least partially unfold during use. When the filter material is folded over by placing the two seams on top of each other, a folding edge is preferably produced that is central to the length of the vacuum cleaner bag and connects the two bag walls to one another.

In a preferred manufacturing process, the filter material is fed in a web, and after at least one fold has been introduced and fixed over the two seams, the filter material is cut and separated from the web of filter material. This allows the production to be carried out in a continuous process.

Figur 1

eine Ansicht eines erfindungsgemäßen Staubsaugerbeutels;

Figur 2

eine Ansicht eines Rohlings zur Herstellung des Staubsaugerbeutels der Figur 1;

Figur 3

eine Ansicht des Rohlings der Figur 2 nach dem Aufeinanderlegen der Nähte;

Figur 4

eine Ansicht des Rohlings der Figur 3 nach dem Herstellen der Seitennähte;

Figur 5

eine Ansicht eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Staubsaugerbeutels, und

Figur 6

der Staubsaugerbeutel der Figur 1 an einem Halter.

The invention is explained in more detail below using two embodiments with reference to the accompanying drawings. They show:

Figure 1

a view of a vacuum cleaner bag according to the invention;

Figure 2

a view of a blank for the production of the vacuum cleaner bag of the Figure 1 ;

Figure 3

a view of the blank of the Figure 2 after the seams have been placed on top of each other;

Figure 4

a view of the blank of the Figure 3 after making the side seams;

Figure 5

a view of a second embodiment of a vacuum cleaner bag according to the invention, and

Figure 6

the vacuum cleaner bag of the Figure 1 on a holder.

A vacuum cleaner bag 1 comprises two bag walls 2 and 3 made of filter material, in particular a multi-layer nonwoven fabric, which enclose an interior space. The bag walls 2 and 3 are integrally formed with one another and connected to one another via a folding edge 8.

Two folds 4 are formed on the bag wall 2, on which the material of the bag wall 2 is arranged in two layers. These folds 4 are fixed at one end of the bag wall 2 by a seam 6. The folds 4 run around the folding edge 8 and are also provided on the bag wall 3. In the illustration of the Figure 1 The outer folds 4 are visible on the bag wall 2, while the inner folds 5 are visible on the bag wall 3. A double-layer section of the filter material is provided between the folds 4 and 5. The folds 4 and 5 are fixed to the bag wall 3 by a seam 7.

The vacuum cleaner bag 1 is rectangular in plan view and comprises a side seam 9 on opposite long sides, with which the bag wall 2 is connected to the bag wall 3. The side seams 9 extend parallel to the folds 4 and 5.

Between the two seams 6 and 7 for fixing the folds 4 and 5, an inlet opening 11 is formed, which provides access to the interior of the vacuum cleaner bag 1.

The folds 4 and 5 are fixed by the seams 6 and 7 and are only loosely held on the opposite folding edge 8. Each fold 4 and 5 is formed by folding the filter material, whereby during use the folds 4 and 5 can at least partially unfold on the folding edge 8 in order to increase the internal volume of the vacuum cleaner bag 1.

In the embodiment shown, two folds 4 and two folds 5 are provided. It is also possible to provide only a single fold 4 and a single fold 5 or more than two folds 4 or more than two folds 5.

The vacuum cleaner bag 1 can optionally be fixed directly to a nozzle of a vacuum cleaner, for example via mechanical fastening means, wherein the nozzle dips into the inflow opening 11 and is then enclosed by the seams 6 and 7. Alternatively, a holding plate can be fixed to the inflow opening 11, for example with a nozzle section that engages in the inflow opening 11. The nozzle can be glued or welded to the filter material of the vacuum cleaner bag 1.

The manufacturing process for the vacuum cleaner bag 1 is described with reference to Figures 2 to 4 explained in more detail.

The filter material can be provided in the form of a continuous web or individual cuts and is then brought to a folding station in order to introduce the folds 4 and 5, for example by means of fingers or rollers which cause the filter material to move perpendicular to the conveying direction. In the area of the folds 4 and 5, the filter material is placed on top of one another so that it can be fixed at two spaced-apart locations by the seams 6 and 7. The seams 6 and 7 can, for example, be arranged at a distance of between 20 cm and 1 m, depending on the length of the subsequent vacuum cleaner bag 1. If the filter material is in the form of a web, it can be cut off after the two seams 6 and 7 have been made. This produces a cut 10 with a rectangular basic shape, as shown in Figure 2 is shown.

The blank 10 thus formed is now folded around a central axis so that the seam 7 is placed on the seam 6. This creates a folding edge 8 on the side opposite the seams 6 and 7. The long sides are in this position according to Figure 3 still unconnected.

In Figure 4 the vacuum cleaner bag 1 is shown when a side seam 9 has been introduced on the opposite long sides, preferably a weld seam. The vacuum cleaner bag 1 is then finished in the form and comprises a first bag wall 2 and a second bag wall 3, which enclose an interior and are connected to one another on a narrow side via a folding edge 8. On the side opposite the folding edge 8 an inflow opening is formed, since the seams 6 and 7 are only loosely placed on top of each other, but are not connected. Optionally, the size of the inflow opening can also be reduced if the seam 6 is at least partially connected to the seam 7. Then the inflow opening no longer extends over the entire width of the vacuum cleaner bag, as is the case in Figure 1 shown, but a part of the width.

In Figure 5 a modified embodiment of a vacuum cleaner bag 1' is shown. The vacuum cleaner bag 1' is, as in the previous embodiment, made from a one-piece blank in which a bag wall 2 is placed on a bag wall 3 and these are connected to one another via a folding edge 8 on one side. Side seams 9 are provided on opposite long sides, which connect the folding edge 8 to the opposite side, on which an inflow opening 11 is formed. Unlike in the first embodiment, two Z-shaped folds 4 and 4' are provided, the folds 4 and 4' each being designed such that an outer section of the filter material facing the side seam 9 is arranged on the inside with respect to the interior of the vacuum cleaner bag 1', while a section of the filter material facing a central region of the vacuum cleaner bag 1' is arranged on the outside. This allows the vacuum cleaner bag to unfold even better in a belly shape during use. The fold 4' is arranged mirror-symmetrically to the fold 4.

In the embodiment of the Figure 5 the folds 4 and 4' on the side of the inlet opening 11 are only connected by a seam 6', which is arranged in the double-layered area of the filter material and the middle area between the folds 4 and 4'. No seam is provided in the lateral single-layered area adjacent to the side seams 9. The seam 6' can optionally also extend over the entire width of the vacuum cleaner bag 1'.

Folds 5 and 5' are provided on the bag wall 3, which are mirror-symmetrical to the folds 4 and 4' and which are connected to one another by seams 7', which are also only arranged in the double-layered area. Here too, the seam 7' can optionally be provided across the entire width of the vacuum cleaner bag 1'.

In the embodiment of the Figure 5 Optionally, one or more folds 4 can be provided in the middle area. The two embodiments of the Figures 1 and 5 can therefore also be combined with each other with regard to the arrangement and design of the folds 4, 5, 4' and 5' as well as the seams 6, 6', 7 and 7'.

In Figure 6 is the vacuum cleaner bag 1 of the Figure 1 on a holder 12 in order to fix the vacuum cleaner bag 1 in a holding device of a vacuum cleaner via the holder 12. The holder 12 is made, for example, from plastic and/or cardboard and comprises a nozzle 13 protruding into the vacuum cleaner bag 1, on the outside of which the vacuum cleaner bag 1 is fixed in the area of the seams 6 and 7, in particular by gluing, welding or by mechanical fastening means.

A radially protruding flange 14 is formed on the nozzle 13, in which an inflow opening 15 is provided, which is surrounded by an optional elastic sealing ring 16. To close the inflow opening 15, a pivotably mounted flap can optionally be provided, which can be fixed, for example, to a locking projection 18. Alternatively, a slide can also be used as a closing element for the inflow opening. Optionally, such a closing element can also be dispensed with. The vacuum cleaner bag 1 can be positioned precisely within a vacuum cleaner using the holder 12 using fixing means.

List of reference symbols

1, 1'

Vacuum cleaner bags

2

Bag wall

3

Bag wall

4, 4'

wrinkle

5, 5'

wrinkle

6, 6'

Seams

7, 7'

Seams

8th

Fold edge

9

Side seam

10

Cutting

11

Inlet opening

12

holder

13

Support

14

flange

18

Locking projection

Claims (15)

Vacuum cleaner bag (1, 1') with two bag walls (2, 3) made of filter material, which enclose an interior space, wherein at least one fold (4, 4', 5, 5') is provided on each bag wall (2, 3), which is fixed on one side by a seam (6, 6', 7, 7'), wherein an inflow opening (11) is formed on the side with the seams (6, 6', 7, 7') for fixing the at least one fold (4, 4', 5, 5'), and the bag walls (2, 3) are connected to one another on two opposite sides by side seams (9), characterized in that the bag walls (2, 3) are connected to one another on the side opposite the inflow opening (11) via a folding edge (8). Vacuum cleaner bag according to claim 1, characterized in that the at least one fold (4, 4', 5, 5') can be at least partially unfolded at the folding edge (8) during use. Vacuum cleaner bag according to claim 1 or 2, characterized in that the vacuum cleaner bag (1, 1') is made in one piece. Vacuum cleaner bag according to one of the preceding claims, characterized in that the side seams (9) are aligned parallel to the at least one fold (4, 4', 5, 5'). Vacuum cleaner bag according to one of the preceding claims, characterized in that two to four folds (4, 5', 5, 5') are provided on each bag wall (2, 3). Vacuum cleaner bag according to one of the preceding claims, characterized in that the seam (6', 7') for fixing the at least one fold (4, 4', 5, 5') is provided only in the double-layered section of the filter material. Vacuum cleaner bag according to one of claims 1 to 5, characterized in that the seam (6, 7) for fixing the at least one fold (4, 5) extends over the entire width of the vacuum cleaner bag (1). Vacuum cleaner bag according to one of the preceding claims, characterized in that on each bag wall (2, 3) there is a A section of an outer fold (4, 4', 5, 5') adjacent to the side seam (9) is arranged facing the interior, while a middle section of the bag wall (2, 3) on the respective outer fold (4, 4', 5, 5') is arranged on the outside in relation to the interior. Vacuum cleaner bag according to one of the preceding claims, characterized in that the vacuum cleaner bag (1, 1') is rectangular in plan view and the side seams (9) are provided on opposite longitudinal sides. Vacuum cleaner bag according to one of the preceding claims, characterized in that the seams (6, 6', 7, 7') and/or the side seams (9) are designed as welded seams. Vacuum cleaner bag according to one of the preceding claims, characterized in that the bag walls (2, 3) are formed symmetrically to a central plane parallel to the side seams (9). Method for producing a vacuum cleaner bag (1, 1') with the following steps: - Feeding a web or cut piece of filter material to a folding station; - introducing at least one fold (4, 4', 5, 5') into the filter material by laying the filter material on top of each other; - fixing the at least one fold (4, 4', 5, 5') by two spaced seams (6, 6', 7, 7'); - placing the two seams (6, 6', 7, 7') on top of each other by folding the filter material and creating a folded edge (8), and - Producing two spaced-apart side seams (9) which connect the folded edge (8) to the opposite side with the seams (6, 6', 7, 7'), whereby an inflow opening remains between two bag walls (2, 3) on the side with the seams (6, 6', 7, 7'). Method according to claim 12, characterized in that the two spaced seams (6, 6', 7, 7') are each produced perpendicular to a longitudinal direction of the at least one fold (4, 4', 5, 5'). Method according to claim 12 or 13, characterized in that the folding takes place centrally when the two seams (6, 6', 7, 7') are placed on top of each other to produce the folded edge (8). Method according to one of claims 12 to 14, characterized in that the filter material is cut after the seams (6, 6', 7, 7') have been produced and is separated from the web of filter material.

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