EP1212971B1 - Dust bag for vacuum cleaner - Google Patents

Abstract

The holder plate (2) is a modified rectangular shape with projections (17) extending beyond the ends of the rectangle. There is an opening for an air hose (5) in the plate. The bag (3) is attached to the plate and is of generally rectangular shape. There are seams, sewn or fastened together with adhesive (12) along the edges of the flattened bag, and a similar seam (13) along the end remote from the holder plate.

Description

The invention relates firstly to a filter bag for a vacuum cleaner, with a holding plate and a dust bag, wherein the dust bag is formed like a tube with a closed free end portion and an end portion connected to the holding plate, further wherein the dust bag consists of two superimposed layers, in the extension direction of the Dust bag extending Längsrandverhaftungen and transversely to the Längsrandverhaftungen extending transverse edge attachment of the free end region, wherein the Längsrandverhaftungen are executed at a distance from each other, which exceeds the extension of the holding plate.

Filter bags of the type in question are known from the prior art in various embodiments. Here, for example, reference is made to EP B1 0 510 314.

From US 6,156,086 a filter bag of the type in question is known, which consists of superimposed layers in a hose-like configuration with an end-side transverse attachment and Längsrandverhaftungen. Further reference is also made to US 3,333,523.

In view of the above-described prior art, a technical problem of the invention is seen in an advantageous development of a filter bag of the type in question.

This problem is solved first and foremost by the invention specified in claim 1, wherein it is pointed out that the resulting in the region of the holding plate gusset is arrested with the holding plate.

According to this embodiment, a filter bag of the type in question is given, which in the deployed, erected state, ie in the operating state, improved properties in terms of a complete and trouble-free filling with Staubgut and the like. The gussets usually resulting from material overhangs on both sides of the holding plate are arrested on the holding plate, so for example by gluing or welding. Furthermore, such an adhesion of the gusset can take place only in the immediate transverse edge region of the holding plate, wherein the overhanging gusset portion is separated in sealing arrest. The particularly in the flat state of the filter bag on both sides on the retaining plate protruding dust bag material forms after the erection of the filter bag side walls, in a cross section through the dust bag these side walls through the selected material supernatant not or not substantially reach overlap to the support plate. Consequently, below the holding plate in the erected state of the filter bag, a receiving cross-section of the holding plate in the connected region of the dust bag is given a substantially corresponding receiving cross-section of the dust bag. Thus, contrary to the known state of the art, in which side walls of the dust bag are obtained from a longitudinal edge Leporellenfaltung, no side wall sections enter the projected area of the holding plate. Ideally, in the erected state of the filter bag, ie the same in the operating state, an approximately rectangular ground plan with approximately at right angles to the front and rear walls of the dust bag aligned side walls, which side walls beyond also in the erected state in cross section of the dust bag inside considered to be convex. It is thereby given an optimal filling of the filter bag, wherein the dust bag in the erected state, in particular in the region of the side walls do not protrude significantly above the holding plate floor plan, so that the filter bag according to the invention can be used in a filter bag chamber of a vacuum cleaner, the free receiving cross section is adapted to the holding plate floor plan. Also results from the inventive design of the filter bag, an advantageous effect to the effect that can not be damaged by a projecting from the flat in the state of the filter bag dust bag side wall resulting from projecting through the retaining plate in the dust bag in the operating state suction nozzle. As already mentioned, the dust bag consists of two superimposed layers, the layer sections extending over the length of the holding plate forming the front or rear wall of the dust bag and the material sections extending beyond the length of the holding plate in the erected region of the filter bag forming the side walls , In this regard, it is further proposed that in the region of the holding plate, a, at least initially continuous connection of the layers is given. Preferably, the superimposed layers of the dust bag are integrally formed, so for example. By folding a dust bag material web. It is also conceivable, however, an arrest of two superimposed layers along one, the holding plate assignable upper transverse edge edge. This transverse edge edge, preferably folding edge, further preferably extends parallel to a holding plate edge; more preferably in the middle of the holding plate. This connecting zone of the layers - transverse edge attachment or transverse edge folding - is preferably interrupted by a designated dust bag filling opening, which is arranged in register with a holding plate filling opening. It is further proposed that the holding plate is elongated with a longitudinal axis extending transversely to the Längsrandverhaftungen. The connecting zone of the dust bag layers, which in any case is originally continuous, preferably extends along this longitudinal plate axis, wherein these connecting zones - transverse edge attachment or folding - extend beyond the holding plate into the protruding, extends in the erected state of the filter bag, the side walls forming areas.

The holding plate may consist of a known, possibly multi-ply cardboard-paper material. It is also conceivable, however, the formation of a plastic retaining plate. As a dust bag material can be selected conventional, possibly also multi-layer paper material. In an exemplary embodiment of the subject invention is provided that the dust bag material is a textile product. Preferred is an embodiment of the subject invention, wherein the dust bag material is a nonwoven, so for example. A meltblown material, wherein the nonwoven material has a substantially greater thickness than a paper filter material. When using a nonwoven material as a dust bag material the aforementioned arrests -Längsrandverhaftungen, Querrandverhaftung, adhesion to the holding plate, arresting the gusset at the transverse edges of the holding plate- achieved by welding. Since such a nonwoven material, due to the lack of inherent rigidity, can not be folded like paper materials, is provided in an advantageous development of the subject invention that the dust bag material has a pre-embossing in terms of the resulting after application of the holding plate and the Randverhaftungen fold lines. Accordingly, on the dust bag layers, such as. Polyester nonwovens, Electretvliese and fleeces with meltblown, local full-surface stampings applied. Due to these embossing, the material locally loses its air permeability completely and is stiffened, similar to a plastic film. As a result of this embossment, a folding of the dust bag material is possible as with paper material. An example of so formed block bottom is attached by means of a suitable adhesive or by a suitable method to the holding plate of the filter bag. In this regard, it is further proposed that a crease be established outside, along a pre-embossing. Consequently, in addition to a full-surface embossing or compaction, a local embossment can also take place. This stamping is to be chosen so that only the surfaces are stiffened, between which the fold lines without embossing arise. As a result, the dust bag material remains flexible and bendable in this fold region. Advantageously, not only the block bottom, ie, the adhesion region of the dust bag is pre-stamped on the retaining plate, but also the longitudinal and transverse edges, which are preferably designed as spiral folds.

The invention further relates to a method for producing a filter bag for a vacuum cleaner, comprising a holding plate and a dust bag, wherein the dust bag is formed by folding and adhesion of a material web, by closing a free end portion and connecting the other end portion to the holding plate. Such methods for the production of filter bags are known. Paper materials in particular, but also textile or non-woven materials for the dust bag are used here. In order to improve a method of the type in question, in particular with regard to the improvement of the dust bag cross-sectional configuration, it is proposed to that the material web is selected with such, viewed transversely to the longitudinal extent of the dust bag width, that the associated extent of the holding plate is exceeded and that the holding plate is applied in an envelope region of the material web to this. According to this embodiment, a method for producing a filter bag is specified, by means of which a filter bag with an approximately rectangular dust bag cross-section, at least in the subsequent to the holding plate portion of the dust bag can be produced. The over the extension of the holding plate projecting material web portions form in the erected state of the dust bag, ie the same in the operating state, side walls, which preferably extend in a projection outside of the holding plate floor plan. The holding plate is in this case preferably elongated, wherein the longitudinal axis preferably extends to the longitudinal extension of the dust bag and is in overlap with the turnup region of the material web. This envelope area - Faltkante - is, at least originally, formed throughout. Only to form a dust bag filling opening, this fold line or this envelope area, for example, interrupted by means of punching. In an advantageous embodiment of the method according to the invention it is provided that first the holding plate is arrested with the material web and then two opposite Längsrandverhaftungen and a Quererrandverhaftung-the formation of Staubbeutelbodens- the material web is performed. Alternatively, it is further proposed in this regard that initially two opposite Längsrandverhaftungen and optionally a Quererrandverhaftung-the formation of Staubbeutelbodens- the material web is carried out and then arrested the holding plate with the material web becomes. Regardless of whether the holding plate is arrested with the material web before or after the creation of the Längsrandverhaftungen, can be provided in a further process step that the resulting in the region of a transverse edge of the holding plate Zwikkel the over the holding plate protruding material web sections are arrested with the holding plate. According to the method of the invention, a filter bag can be produced, which can be filled completely and without interference with dust and the like after deployment in the operating position. If a textile or nonwoven material, such as polyester fleece, electret fleece or nonwoven fabric with meltblown, is selected as the anther material, it is further proposed that the material web be pre-embossed with regard to folding lines arising from the arrest with the retaining plate. As a result, it is also possible to fold a nonwoven dust bag material, as usual in paper materials, for example, to a block bottom, which block bottom can be fastened to the holding plate by means of a suitable adhesive or by suitable methods. In this case, a full-surface stamping or compaction of the material web can take place in the folding areas. However, it is also conceivable to carry out only local stamping. These stampings are to be chosen so that the, the later fold lines delimiting surfaces are stiffened. The subsequent folding or bending lines themselves have hereafter no embossing, whereby the dust bag material remains flexible and flexible in this folding area. In addition, it is also conceivable to perform these knockouts in the area of the longitudinal edge arrests and transverse edge attachment in order to be able to form spiral folds here. Arrests of longitudinal edges, the edge forming a dust bag bottom and detention of a dust bag on the holding plate can be formed in a suitable manner by welding.

Fig. 1

eine Ansicht gegen einen Filterbeutel einer ersten Ausführungsform, im flachgelegten Zustand desselben;

Fig. 2

eine Herausvergrößerung des Bereiches II-II in Fig. 1;

Fig. 3

die Ansicht gegen den Filterbeutel gemäß Fig. 1, jedoch im aufgestellten Zustand desselben;

Fig. 4

eine Herausvergrößerung eines oberen, halteplattenseitigen Eckbereiches in Schnittdarstellung;

Fig. 5

die Seitenansicht gegen den aufgestellten Filterbeutel;

Fig. 6

eine schematische Abfolgedarstellung, das Herstellungsverfahren des Filterbeutels in der ersten Ausführungsform betreffend;

Fig. 7

den Staubbeutel des Filterbeutels in Einzeldarstellung, welcher Staubbeutel mit Vorverprägungen entlang sich im Zuge der Filterbeutelherstellung ergebender Faltlinien versehen ist;

Fig. 8

eine vergrößerte Detaildarstellung gemäß Fig. 2, jedoch eine zweite Ausführungsform des Filterbeutels betreffend;

Fig. 9

eine weitere der Fig. 2 entsprechende Darstellung, betreffend eine dritte Ausführungsform;

Fig. 10

den Schnitt gemäß der Linie X-X in Fig. 9, jedoch bei aufgestelltem Filterbeutel;

Fig. 11

die Ansicht gegen den Filterbeutel der dritten Ausführungsform in aufgestelltem Zustand;

Fig. 12

die Seitenansicht hierzu;

Fig. 13

eine der Fig. 1 entsprechende Ansichtsdarstellung gegen einen Filterbeutel einer vierten Ausführungsform;

Fig. 14

die Herausvergrößerung des Bereiches XIV-XIV in Fig. 13;

Fig. 15

die Ansicht gegen den Filterbeutel der vierten Ausführungsform im aufgestellten Zustand;

Fig. 16

die Seitenansicht hierzu;

Fig. 17

eine schematische Abfolgedarstellung, die Herstellung des Filterbeutels gemäß der vierten Ausführungsform betreffend.

The invention with reference to the accompanying drawings, which only illustrates several embodiments, explained in more detail. It shows:

Fig. 1

a view against a filter bag of a first embodiment, in the flat state thereof;

Fig. 2

an enlargement of the area II-II in Fig. 1;

Fig. 3

the view against the filter bag of Figure 1, but in the erected state thereof.

Fig. 4

an outward enlargement of an upper, holding plate-side corner region in a sectional view;

Fig. 5

the side view against the erected filter bag;

Fig. 6

a schematic sequence diagram relating to the manufacturing method of the filter bag in the first embodiment;

Fig. 7

the dust bag of the filter bag in a single representation, which dust bag is provided with pre-stampings along in the course of filter bag production resulting fold lines;

Fig. 8

an enlarged detail of Figure 2, but concerning a second embodiment of the filter bag.

Fig. 9

a further corresponding to Fig. 2 representation, relating to a third embodiment;

Fig. 10

the section along the line XX in Figure 9, but with the filter bag.

Fig. 11

the view against the filter bag of the third embodiment in the erected state;

Fig. 12

the side view to this;

Fig. 13

a view corresponding to Figure 1 view against a filter bag of a fourth embodiment.

Fig. 14

the enlargement of the area XIV-XIV in Fig. 13;

Fig. 15

the view against the filter bag of the fourth embodiment in the erected state;

Fig. 16

the side view to this;

Fig. 17

a schematic sequence diagram relating to the production of the filter bag according to the fourth embodiment.

First, with reference to FIG. 1, a filter bag 1 is shown and described in a first embodiment, comprising a holding plate 2 and a dust bag 3 arrested with the holding plate 2.

The holding plate 2 is elongated rectangular in plan view and consists in the illustrated embodiment of a conventional, multi-ply cardboard-paper material. Conceivable, however, is a plastic training the holding plate 2. Near a narrow end portion is provided at a distance from the associated transverse edge edge 4, the support plate 2 to form a filling opening 5 with an aligned on the longitudinal axis x of the support plate 2 opening.

The dust bag 3 is formed like a tube with a closed free end forming a bag bottom end portion 6 and an attached to the support plate 2 end portion 7. The tubular formation of the dust bag 3 is given by two superimposed layers 8, 9 of a dust bag material, which layers 8 and 9 formed are by turning over an originally about twice the height of the dust bag 3 to be formed having material web. The, the connection of the two layers 8 and 9 forming the envelope line 10 extends transversely to the dust bag longitudinal extent.

The dust bag material web or the layers 8 and 9 formed by folding are connected to each other along their transversely to the envelope line 10 extending longitudinal edges 11 by Längsrandverhaftungen 12. Furthermore, the lower end portion 6 of the dust bag 3 is closed by a parallel to the envelope line 10 extending transverse edge attachment 13 of the layers 8 and 9.

In the illustrated embodiment, a nonwoven material is selected as a dust bag material. The arrests of the materials with each other, ie the Längsrandverhaftungen and the Querrandverhaftung are here formed by welding. The attachment of the so formed dust bag 3 on the support plate 2 may be achieved in a holding plate 2 made of a cardboard-paper material by bonding.

As can be seen in particular from FIG. 1, the distance dimension a between the longitudinal edges 11 exceeds the longitudinal extent b of the retaining plate 2, resulting in dust bag protrusion sections 14 on both sides of the retaining plate 2 whose width c measured transversely to the longitudinal extent of the dust bag 3 is greater than that Half of the measured transverse to the longitudinal extent of the holding plate 2 width d of the holding plate transverse edge. 4

The binding of the dust bag 3 on the underside of the holding plate 2 takes place in the envelope area 15 on both sides of the envelope line 10 such that the envelope line 10 is in register to the holding plate longitudinal axis x. In this envelope region 15, the dust bag 3 is provided with a dust bag filling opening 16, the center of which is arranged on the cover line 10. Furthermore, the arrangement of the dust bag filling opening 16 is selected so that it lies after adhesion of the dust bag 3 to the holding plate 2 in overlap to the holding plate filling opening. 5

The supernatant corner zones 17 which emerge laterally from the transverse edges 4 of the retaining plate in the region of the overhang sections 14 of the anther bag 3, on the one hand, have a lower base, based on the associated longitudinal edge 11, with respect to a viewing on the retaining plate 2 according to FIG 45 ° bent cover area 18 and an upper, in plan view approximately an isosceles triangle forming, on a triangle side with the retaining plate 2 arrested, cantilevered gusset 19 on.

The longitudinal edge arrests 12 extend over the longitudinal edges 11 and over the lower turnup regions 18 into the free tip of the cantilevered gusset 19.

The laterally over the support plate 2 protruding Staubbeutelmaterial Überberstandabschnitte 14- forms after an erection of the filter bag 1 as shown in Figs. 3 to 5 side walls 20, which according to the side view representation in Fig. 5, have a substantially triangular plan. In the established operating position of the filter bag 1, the side walls 20 close in a cross section about a right angle to the now adjusting front and rear walls 21, 22 of the dust bag 3, wherein further drawn in cross-section contour of the erected dust bag 3 not or not protrudes substantially beyond the outer contour of the holding plate 2, so that the filter bag 1 according to the invention can also be used in vacuum cleaners, which have a filter bag receiving opening, which are cross-sectionally adapted to the holding plate. 2

Furthermore, the side walls 20 of the dust bag 3 are arranged outside the filling area in the erected state, so that a filler neck of the vacuum cleaner entering through the filling opening 5 of the holding plate 2 and through the dust bag filling opening 16 can not damage the associated side wall 20. Furthermore, in the inventive design of the filter bag 1 a complete and trouble-free filling with dust is guaranteed.

FIG. 6 schematically shows a method sequence for producing a filter bag 1 according to the first exemplary embodiment shown in the lower diagram of the procedure is shown in view. Assigned to each method step is shown above an enlarged sectional view. The individual process steps are shown following from left to right.

First, a dust bag material web 23 is centered to form the superimposed layers 8 and 9, after which the dust bag filling opening 16 is formed in the region of the envelope line 10 thereby formed by semicircular punching or the like. After that, the two-ply material web is cut to length to form longitudinal edges 11 (method step la).

Depending on the choice of material, the subsequent folding lines 24, 25 and possibly further fold lines 35 are subsequently embossed along the longitudinal edges 12 or the later transverse edge attachment 13 (method step IIa). In particular, in a production of the dust bag 3 made of a nonwoven material as shown in Fig. 7 stampings made on both sides of the desired fold lines, which in these pre-compressed areas the dust bag material completely impermeable to air and stiffened, similar to a plastic film is. As a result, in the area of the embossings or between these embossings, it is also possible to fold a nonwoven material, as is usual with a paper material. Preference is further given to forming such pre-stampings in the region of the later transverse edge attachment 13 in order to be able to form a spiral fold in this area.

After carrying out the pre-embossing, the arrest of the longitudinal edges and of the transverse edge takes place in a further method step IIIa.

To adhere the dust bag 3 to the support plate 2, the dust bag 3 is folded around the fold lines 25 such that the cover area 15 formed on both sides of the cover line 10 is provided over the full area between the fold lines 24 for bonding to the support plate 2 (method step IVa).

After the adhesion of the dust bag 3 to the holding plate 2, the filter bag 1 can be unfolded into the operating position according to the method step Va.

In a second embodiment according to FIG. 8, the gusset 19 resulting from the production can be arrested on the upper side of the holding plate 2, for example, be glued.

Moreover, according to the illustrations in FIGS. 9 to 12, it is also conceivable to arrest the gusset 19 with the latter only in the region of the associated transverse edge 4 of the holding plate 2 and to remove the further protruding gusset portion, in which case the attachment to the holding plate 2 is executed sealing.

A fourth embodiment of the filter bag 1 according to the invention is shown in FIGS. 13 to 16. As can be seen from FIG. 13, the holding plate 2 results on both sides in this exemplary embodiment-viewed in the longitudinal direction thereof-overhang corner zones 17 with a rectangular plan view, wherein the longitudinal edge arrests 12 in the flat state of the filter bag 1 straight along the longitudinal edges 11 and, parallel to the transverse edges 4 of the holding plate 2 extending over the overhang corner zones 17 extend. Zufolgedessen these supernatant corner zones 17 are arrested in the longitudinal edges 11 with these.

These overhang corner zones 17 each have a lower, in outline triangular envelope area 27, which merges into an upper, rectangular in plan envelope area 28th

The protrusion sections 14 formed here are also selected in their width c such that they correspond approximately to half to the entire transverse edge extension d and form side walls 20 after the filter bag 1 has been set up.

The over the lower, triangular envelope portion 27 protruding, also triangular portion of the upper envelope portion 28 forms in the erected state of the filter bag 1 a freely projecting Zwikkel 29, which can be arrested according to the second and third embodiment also on the support plate 2.

The process shown schematically in Fig. 17 shows according to the first embodiment, that first to form the superimposed layers 8 and 9, a web of material 23 is folded around an envelope line 10 and thereafter in the region of the Umschlaglinie 10 a semicircular punched to form the dust bag filling opening sixteenth is carried out (see method step Ib).

Again hereafter, in a nonwoven or textile material, a pre-embossing is first carried out to form fold lines 24, 25 (step IIb).

In a further method step IIIb, the dust bag material is turned over in such a way that the envelope region 15 which results on both sides of the cover line 10 between the cover lines 24 rests over the full area in the upper end region 7 on the front layer 8 of the dust bag 3.

Thereafter, the holding plate 2 is applied to the envelope area 15 and arrested with this, that the longitudinal axis x of the holding plate 2 overlaps the envelope line 10, this at the same time remaining on both sides supernatant portion 14 of the dust bag 3 (step IVb).

Subsequently, in a further method step Vb, the longitudinal edge arrests 12 and the transverse edge attachment 13 are carried out, as in the case of a paper bag material by adhesive bonding and in the case of a dust bag material from, for example, a nonwoven fabric by welding.

Finally, by setting up the filter bag 1 in the process step VIb resulting form of a complete and trouble-free with dust to be filled filter bag 1, the side walls 20 are arranged so that they are not by a projecting through the filling opening 5 in the dust bag 3 suction nozzle can be damaged.

Claims (11)

1. Filter bag (1) for a vacuum cleaner having a retaining plate (2) and a dust bag (3), wherein the dust bag (3) is of tubular construction with a sealed free end region (6) and an end region (7) tied to the retaining plate (2), wherein the dust bag (3) further consists of layers (8, 9) laid over one another which have longitudinal edge arrestments (12) running in the direction of extension of the dust bag (3) and a transverse edge arrestment (13) of the free end region (6) running crosswise with respect to the longitudinal edge arrestments (12), wherein the longitudinal edge arrestments (12) are constructed at a distance (a) from one another which exceeds the extension (b) of the retaining plate (2), characterised in that the gusset (19, 29) resulting in the region of a transverse edge (4) of the retaining plate (2) is held in check by the retaining plate (2).
2. Filter bag according to claim 1, characterised in that in the region of the retaining plate (2) there is an at any rate originally continuous connection of the layers (8, 9).
3. Filter bag according to one or more of the preceding claims, characterised in that the retaining plate (2) is of elongated construction with a longitudinal axis (x) extending transversely with respect to the longitudinal edge arrestments (12).
4. Filter bag according to one or more of the preceding claims, characterised in that the dust bag material is a textile product.
5. Filter bag according to one or more of the preceding claims, characterised in that the dust bag material is a non-woven fabric.
6. Filter bag according to one or more of the preceding claims, characterised in that the dust bag material has a pre-embossed section (26) with regard to the fold lines (24, 25) resulting after application of the retaining plate (2) and the edge arrestments (12, 13).
7. Filter bag according to one or more of the preceding claims, characterised in that a pleat sets in outside, along a pre-embossed section (26).
8. Method for producing a filter bag (1) for a vacuum cleaner having a retaining plate (2) and a dust bag (3), wherein the dust bag (3) is formed from a web of material (23) by pleating and arrestment, by sealing a free end region (6) and tying the other end region (7) to the retaining plate (2), characterised in that the web of material (23) is selected with such a width (a) viewed transversely with respect to the longitudinal extension of the dust bag (3) that the associated extension of the retaining plate (2) is exceeded and that the retaining plate is applied to the web of material (23) in a folded-over region (15) of the latter.
9. Method according to claim 8, characterised in that the retaining plate (2) is first of all held in place with the web of material and then two opposite longitudinal edge arrestments (12) and one transverse edge arrestment (13) of the web of material (23) are carried out.
10. Method according to one or more of claims 8 to 9, characterised in that first of all two opposite longitudinal edge arrestments (12) and if need be one transverse edge arrestment (13) of the web of material (23) are carried out and then the retaining plate (2) is held in check by the web of material (23).
11. Method according to one or more of claims 8 to 10, characterised in that the web of material (23) is pre-embossed with regard to fold lines (24, 25) produced in association with the arrestment with the retaining plate (2).

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