EP0596382A1 - Vacuum cleaner dust bag - Google Patents

Abstract

The invention relates to a vacuum cleaner dust bag, having a holding plate (1) which consists of a paperboard-paper material and has a seal-containing opening (9) for a suction pipe of a vacuum cleaner, the opening (9) being able to be closed from outside by a separate closure flap (10) having an insertion region, and proposes, in order to obtain an improved dust bag, that the paperboard-paper material is made three-ply (plies a, b, c) in the region of the opening (9) and at least two-ply in the remaining region of the holding plate (1), a rubber-ring seal (11) being held between two plies, preferably between the second and third ply (b, c). <IMAGE>

Description

The invention relates to a dust filter bag for a vacuum cleaner, with a holding plate made of a solid paper material, for example cardboard-paper material, with which a dust bag is, for example, adhesively bonded, which holding plate has a sealable opening for an intake pipe of a vacuum cleaner, the Opening can be closed with a separate closure element, which can be moved from an open position, in a secondary arrangement to the opening, into a closed position.

The bag-forming filter material is fastened in the vicinity of the edge on one broad surface of the holding plate, preferably in a sealing adhesive connection. The bag body can be folded to save space by folding the support plate down into the plane of the wall-forming layers of the bag body. A dust filter bag of this type is known for example from DE-OS 2 407 478. The separate locking tab there consists of a strip which is displaceably guided between two layers of the holding plate and which has a hole. In the case of a hole that is approximately congruent to the opening of the holding plate, the connecting piece of the suction pipe can be docked there in an operationally suitable manner. When the dust filter bag is filled, pull on the sealing flap and bring the unperforated section of the strip to the opening in the closed position. This prevents a kind of breathing movement when grasping the collapsible bag body. This prevents the otherwise observed blowing out of the dust particles. According to variant FIG. 4 of the above-mentioned precursor, a strip holding in self-adhesive connection can also be used as the closure flap, which strip can be transferred from its storage meander fold into a position covering and closing the opening.

From DE-GM 90 16 893 it is known to assign a sealing film to the edge of the opening, the hole diameter of which is smaller than that of the opening, so that the perforated edge zone of the film lies tightly sealing against the outer surface of the suction pipe or connecting piece.

The object of the invention is to design an improved dust filter bag.

This object is achieved by the invention specified in claim 1.

The subclaims are advantageous developments of the dust filter bag according to the invention.

As a result of such an embodiment, a dust filter bag that is structurally and operationally improved is implemented. The opening area, which is exposed to not inconsiderable mechanical stress, is highly stable. Specifically, the procedure is such that the closure element rests on at least two layers of the solid paper material, at least in an open position, and that a rubber ring seal is gripped between these two layers in the area of the opening. Together with the decisive improvement in stability, a secure setting of a rubber ring seal for the connecting piece of the vacuum cleaner has been achieved. Preferably, the holding plate also has, at least in the region of the opening, three layers arranged one above the other in a stacked arrangement. The area of the opening is not only made of the highly stable three-layer laminate, it is also realized that the closure element, for example a closure tab, is only within the contours of the holding plate, both in the open and in the closed position. With regard to the rubber ring seal, a joint between two (lower) layers is also used to accommodate the sealing element. The fixation of the sealing element can be included in the laminate securing, for example by an adhesive or hot-melt layer also capturing the rubber ring seal in a position-securing manner. There is no additional fastening effort, as would be necessary, for example, with an overlying sealing film. Since a rather narrow peripheral bond zone is sufficient for the rubber ring seal, the stabilized composite material runs through to the edge of the support plate. Since this edge generally has a specific contour to a corresponding storage zone of the vacuum cleaner, nose-like projections etc. are still very stable in themselves, even with a small dimension, even with a two-layer shape. The only partial three-layer structure in the area of the opening, on the other hand, leaves layer material available for further development measures. In addition, it proves to be advantageous that an opening edge area of the middle layer is set back from opening edges of the upper and lower layers to form a latching opening. This creates an advantageous prerequisite for securing the position of a sealing tab sealing from the outside. Furthermore, it proves to be advantageous that with a circular configuration of the opening, the middle layer has a larger diameter than the upper and lower layers with a concentric arrangement of the diameters. Here, the latching opening is supplemented to form a circumferential latching opening, so that it is not even necessary to assign the closure tab in a particularly targeted manner. It is also proposed that the holding plate be formed in three layers continuously on the edge side. This has the advantage of supporting the holding plate in the device-side receptacle on an equal basis, that is to say completely without tilting, the region remote from the opening being able to remain double-layered, ie layer material for other purposes Is available, for example, from this residual material, a foldable closure flap is designed over the opening. But even here the importance of the multi-layer, in particular three-ply, of the holding plate is not exhausted, namely that a configuration of even independent importance is opened in such a way that the uppermost layer also forms a holding bracket and that the holding bracket surrounds or describes the opening is. This retaining bracket lies in the position of use of the dust filter bag in a layer-forming manner, but can be swiveled into a folded-down position for transport or as a pull-out aid in order to perform the relevant function.

• Figur 1 den Staubfilterbeutel gegen die Halteplatte gesehen bei raumsparend zusammengefaltetem Beutel, gemäß dem ersten Ausführungsbeispiel, unverschlossen,
• Figur 2 den Schnitt gemäß Linie 11-11 in Figur 1,
• Figur 3 eine Ansicht wie Figur 1, jedoch bei verschlossener Öffnung,
• Figur 4 den Schnitt gemäß Linie IV-IV in Figur 3,
• Figur 5 den Staubfilterbeutel in perspektivischer Darstellung, unverschlossen,
• Figur 6 einen Querschnitt durch die dreilagige Halteplatte,
• Figur 7 einen vergrößerten Schnittauszug des Randbereichs der Halteplatte,
• Figur 8 den Staubfilterbeutel gegen die Halteplatte gesehen bei raumsparend zusammengefaltetem Beutel, gemäß dem zweiten Ausführungsbeispiel, unverschlossen,
• Figur 9 den Schnitt gemäß Linie IX-IX in Figur 8,
• Figur 10 eine Darstellung wie Figur 8, jedoch bei verschlossener Öffnung,
• Figur 11 den Schnitt gemäß Linie XI-XI in Figur 10,
• Figur 12 diesen Staubfilterbeutel in perspektivischer Darstellung, unverschlossen,
• Figur 13 den Staubfilterbeutel gegen die Halteplatte gesehen bei raumsparend zusammengefaltetem Beutel, gemäß dem dritten Ausführungsbeispiel, unverschlossen,
• Figur 14 den Schnitt gemäß Linie XIV-XIV in Figur 13,
• Figur 15 eine Darstellung wie Figur 13, jedoch bei verschlossener Öffnung,
• Figur 16 den Schnitt gemäß Linie XVI-XVI in Figur 15,
• Figur 17 den Staubfilterbeutel in perspektivischer Darstellung, unverschlossen,
• Figur 18 den Staubfilterbeutel gegen die Halteplatte gesehen bei raumsparend zusammengefaltetem Beutel, gemäß dem vierten Ausführungsbeispiel, unverschlossen,
• Figur 19 den Schnitt gemäß Linie XIX-XIX in Figur 18,
• Figur 20 eine Darstellung wie Figur 18, jedoch bei verschlossener Öffnung,
• Figur 21 den Schnitt gemäß Linie XXI-XXI in Figur 20 und
• Figur 22 den Staubfilterbeutel in perspektivischer Darstellung, unverschlossen.

The subject matter of the invention is explained in more detail below with reference to four exemplary embodiments illustrated in the drawings. It shows

• FIG. 1 shows the dust filter bag against the holding plate when the bag is folded to save space, according to the first exemplary embodiment, unlocked,
• FIG. 2 shows the section along line 11-11 in FIG. 1,
• FIG. 3 shows a view like FIG. 1, but with the opening closed,
• FIG. 4 shows the section along line IV-IV in FIG. 3,
• 5 shows the dust filter bag in a perspective view, unlocked,
• FIG. 6 shows a cross section through the three-layer holding plate,
• FIG. 7 shows an enlarged section of the edge area of the holding plate,
• FIG. 8 shows the dust filter bag against the holding plate when the bag is folded to save space, according to the second exemplary embodiment, not closed,
• 9 shows the section along line IX-IX in FIG. 8,
• FIG. 10 shows an illustration like FIG. 8, but with the opening closed,
• FIG. 11 shows the section along line XI-XI in FIG. 10,
• FIG. 12 shows this dust filter bag in a perspective view, unlocked,
• FIG. 13 shows the dust filter bag against the holding plate when the bag is folded to save space, according to the third exemplary embodiment, not closed,
• FIG. 14 the section along line XIV-XIV in FIG. 13,
• FIG. 15 shows a representation like FIG. 13, but with the opening closed,
• FIG. 16 shows the section along line XVI-XVI in FIG. 15,
• FIG. 17 shows the dust filter bag in a perspective view, unlocked,
• 18 shows the dust filter bag against the holding plate when the bag is folded in a space-saving manner, according to the fourth exemplary embodiment, not closed,
• FIG. 19 shows the section along line XIX-XIX in FIG. 18,
• FIG. 20 shows a representation like FIG. 18, but with the opening closed,
• Figure 21 shows the section along line XXI-XXI in Figure 20 and
• Figure 22 shows the dust filter bag in a perspective view, unlocked.

All four illustrated exemplary embodiments show a dust filter bag, for example for a vacuum cleaner, which ends on the docking side with a hard part in the form of a holding plate 1. The actual bag 3 extends from the back surface 2 and is glued to the edge.

The holding plate 1 consists of a cardboard paper material.

The holding plate 1 has a contour K, within which a closure element 10 (which will be explained in more detail below) is accommodated both in the open position (for example FIG. 1) and in the closed position (for example FIG. 10). In the open position, the second layer b also offers full-area support for the closure element 10.

The bag 3 can be folded to save space. When folded, it can be placed against the rear surface 2 (see, for example, FIG. 2). For this purpose, the narrow sides 4 of the bag 3 are drawn in in a V-shape. On the holding plate side, the inner fold branches into a Y-shaped branch, which ends directed towards the corner zones of the narrow side of the holding plate 1. The bottom of the bag 3 is closed by folding and gluing. The fold-out bears the reference number 5.

The open or mouth-side bag edge is fixed to the rear surface 2 of the holding plate 1 by angling the edge 6 there and gluing to said surface 2. The corresponding adhesive layer is designated by 7.

The basically rectangular holding plate 1 is constructed continuously or predominantly in three layers. The individual positions of the same outline are labeled a, b, c. The uppermost layer a, which is furthest from the bag, forms the front surface 8 of the holding plate 1. From there, the suction pipe or connecting piece of the vacuum cleaner, not shown, is docked. The individual layers a to c best hen preferably from a single folding blank, which is either placed zigzag one on top of the other or by folding a free layer between two other, ie folding two end positions against each other (see FIG. 6).

The individual layers a to c are broken through to form an opening 9. It is a circular opening. Their center is located in the plane of symmetry of the holding plate 1 which also forms the cutting line, the two halves of which are thus designed to be mirror-identical.

Said opening 9 can be sealed from the outside by means of a locking tab 10. The latter is an integral part of the top layer a, that is to say formed from its material section by cutting free. With the aid of such a closure flap 10, the known aspiration of the dust-filled bag 3 can be reduced or even avoided when the volume is reduced by touching it. The free cut is continuously labeled F.

In all of the exemplary embodiments, the cardboard paper material has three layers, at least in the region of the opening 9. The three-layer laminate stabilizes the docking area for the suction pipe or the suction nozzle of the vacuum cleaner, but also has the essential advantage of accommodating a rubber ring seal 11 between the joint-forming contact surfaces of two layers, which is easy to assign. They are preferably arranged between the second and third layers b and c. The edging can be seen particularly clearly from the sectional views. With regard to the rubber ring seal 11, it is a highly elastic ring membrane whose clear diameter D1 is smaller than the clear diameter of the circular opening D2. Of course, it can also be a plastic film with the corresponding sealing property.

The radial clearance depth of the rubber ring seal corresponds approximately to the width of the border between the layers b and c. The border depth is shown somewhat broader in the drawings.

The clear diameter D1 of the rubber ring seal 11 is dimensionally greater than that of the intake pipe or intake pipe, not shown. The lateral wall of the latter runs approximately in the central region of the free-standing length of the rubber sealing ring 11.

The remaining length or the remaining area of the holding plate 1 is at least two layers. This area is expediently used in relation to the uppermost layer a to form the locking tab 10. In this way, no separate locking member needs to be manufactured and assigned. If the corresponding cut-out forming free cut does not go, or does not go essentially everywhere to the periphery of this position, the basic thickness x is nevertheless retained in the area of the holding plate 1 forming the make-up tab 10.

This is the case with all four exemplary embodiments.

All of the locking tabs 10 also fold around a hinge zone 12 lying transversely to the length of the rectangular holding plate 1. The latter is formed by a fold line. The ease of folding can be increased, for example, by a perforation 13.

The center point P1 or center point of the opening 9 is at least as far from the hinge zone 12 as the center point P2 of the locking tab 10. Both lie on the plane or line of symmetry formed by the intersection lines.

According to the first exemplary embodiment, the closure flap 10 has an elongated shield-like shape with an arcuate edge 14 formed at the free end. Its radius corresponds to that of the opening 9. The width y of this closure flap 10 corresponds at most to the diameter D2.

Furthermore, in the zenith of the circular edge 14 there is a locking lug 15. In front of this locking lug 15, the top layer a leaves a cleared cut-out area as an access recess 16. The latter is about the size of a fingertip, so that the locking lug 15 can easily be reached under with the fingernail to close the locking tab 10 from its immersion position in the uppermost position a into the closed position shown in FIG. 4.

This closed position is locked. For this purpose, there is a locking opening 17 at the congruent point with 15. This is formed in that an opening edge region of the middle layer b is set back and partially set back from the opening edges of the top (a) and bottom layer (c). Thus, a space is formed between the layers a and c in the region of the opening 9, which is generally for holding the closure element, d. H. here the locking tab 10 is used. In particular, latch 15 and latch opening 17 are expediently semicircular. The latching force achieved is so great that even with the holding plate 1 of the dust filter bag pointing downward, no dirt particles can fall out of the interior of the bag 3. Aspiration is also significantly reduced.

In general, the idea is realized here that the middle layer b has a larger recess associated with the opening 9 than the top and bottom layers a, c.

The fact that the rubber ring seal 11 lies between the second and third layers b, c results in an advantageous immersion depth in the opening 9 circumscribing the opening edges. Two layer thicknesses must be run through. The opening edges are designated 9 'throughout, whereas the opening edge region defining the latching opening 17 bears the reference symbol 9 ".

As can be seen in FIG. 4, the third layer c can also have a bulge 18 corresponding to the outline, congruent with the latching opening 17. Due to the high elasticity or flexibility of the rubber ring seal 11, this allows the catch 15 to dodge slightly in this direction, but is springed back by the zone of the rubber ring seal 11 which is released via the bulge 18.

Instead of limiting the latching opening 17 to a relatively small opening area 9 ″, the procedure is alternatively such that with a circular configuration of the opening 9 the middle layer b has a somewhat larger diameter than the diameter D2 of the top (a) and bottom layer c in corresponding to a concentric arrangement of the diameters, which leads to a larger latching grip under the locking flap 10 if it has a correspondingly widened latching lug 15 or is immersed with the entire edge 14 in a latching manner.

In the second embodiment, a further development is based on the fact that the rest, i.e. the area of the holding plate 1 facing away from the opening 9, in addition to the formation of the locking tab 10, is also used to create a holding bracket 19. The latter has a U-shape. Its U-web 20 is circular. The adjoining U-legs 21, which run parallel to the opening 9, are each rooted in a hinge zone 23. This also extends transversely to the length of the holding plate 1. The hinge zones 23 are flush with the hinge zone 12 of the locking tab 10. The hinge zones 23 also become formed by fold lines of the blank and can also be perforated.

With the retaining bracket 19 lying in a flat extension, this helps to maintain the basic thickness x. In terms of expansion, it covers a considerable area to form a thickness, so that there is no fear of the canting of the holding plate. The area of the bracket 19 could therefore be cut away in terms of location. In the illustrated embodiment, however, the entire layer a is retained peripherally.

The disposal position is shown in FIG. 12. There, the holding bracket 19 is angled into a folded-up position. The dust filter bag can be easily removed from the vacuum cleaner housing and carried to the disposal site. Before that, of course, the locking tab 10 is brought into the locking position.

The closure tab 10 according to the second embodiment differs structurally from that of the first one in that its closing active plate part now does not overlap the rubber ring seal 11, but rather engages under rubber ring seal 11 with sections of its edge. This can be seen particularly clearly from FIGS. 10 and 11. The under-engaging edge sections of the closure flap 10, which is circular here, bear the reference number 24. They end at both ends with V-shaped incisions 25. The apex extends to the clear diameter D1 of the rubber ring seal 11, that is to say the circular line. Following the V-shaped incisions 25, a tongue 26 and a web 27 extend from the disk-shaped section of the closure tab 10. Both are directed radially and extend in the plane of symmetry, embodied by the said cutting line. The web 27 leads to the hinge zone 12 of the locking tab 10, which is cut free in the interior of the U-shaped bracket 9. The tongue 26 diametrically opposite the web 27 is supported on the opening edge 9 'of the uppermost layer a and, like the web 27, prevents the closure tab 10 from hanging into the interior of the bag 3 in the pressed-in position. Rather, the radially outgoing material extensions cause a resilient pressing force against the underside of the rubber ring seal 11 and, moreover, a completely perfect seal.

In the third embodiment, the same properties and relationships are present, but with the structural difference that here the bracket 19 is not made of the material of the rest, i.e. area of the holding plate 1 remote from the opening is cut out, but from the areas having the opening 9. This retaining bracket also has a U-shape and extends concentrically and radially outwards at a distance from the opening edge 9 'of the opening 9. Beyond this cut-out, material of the uppermost layer a remains, so that the basic thickness x is retained up to the periphery.

In the remaining area of the holding plate 1, the closure tab 10 is again cut free.

Due to the inward-lying gripping niches 28 of the holding plate 1 lying on the longitudinal sides, the free ends of the U-legs 21 there are slightly offset from one another, as a result of which a sufficiently wide hinge-forming material bridge also remains in the uppermost layer a.

Said gripping niches 28 can be included in the formation of an assignment module in that projections on the housing side protrude there (not shown).

Otherwise, the holding plate 1 has several tooth-like, outward facing edges jumps 30, which enter into corresponding recesses in the housing and also serve to ensure tamper evidence. Such tooth-like projections 30 prove to be quite stable, due to the predominantly three-layer structure.

As can be seen, in the exemplary embodiments having a holding bracket 19, the hinge zone 23 does not extend in the transverse central plane of the holding plate, but rather is offset somewhat in the direction of the opening 9. This compensates for the larger accumulation of material in the holding plate 1 there. On the other hand, however, in the wearing situation, detection of the retaining bracket 19 results in a slight lifting of this zone, so that in any case a pouring position of the dust filter bag is avoided, so that no dirt particles can fall out when the closure position is missed. The mouth is higher.

The fourth exemplary embodiment differs from the former in that the component forming the tongue 26 is cut free in a zone extending to the edge of the holding plate 1, that is to say it has a longer gripping length. In spite of this, the basic thickness x remains essentially unchanged, since the material of the uppermost layer a continues continuously laterally into the narrow tooth-like projections 30 there. There is a fork-shaped section.

In addition, the V-shaped incisions 25 at the transition area to the web 27 no longer start directly in the band-shaped inlet zone between the web 27 and the disk-shaped section of the closure flap 10, but offset at an angle. This results in a slight shortening of the peripheral portions 24 in the circumferential direction, which can thereby be “threaded” even more easily into the opening 9 in order to come under the rubber ring seal 11.

Common to all of the exemplary embodiments is a hole 31 arranged in the remaining area of the holding plate 1 and penetrating all three layers. This extends near the edge and lies in the plane of symmetry of the holding plate 1.

In this last, as well as in all the other exemplary embodiments following the first described solution, the reference numbers are used analogously, without repeating the text for obvious reasons.

The features of the invention disclosed in the above description, the drawing and the claims can be of importance both individually and in any combination for the implementation of the invention. All the features disclosed are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application.

Claims (9)

1. Dust filter bag for a vacuum cleaner, with a holding plate (1) consisting of a solid paper material such as cardboard, with which a dust bag is bonded, for example, which holding plate (1) has a sealable opening (9) for a suction pipe of a vacuum cleaner, whereby the opening (9) can be closed with a separate closure element (10) which can be displaced from an open position, in a secondary arrangement to the opening (9), in a closed position, characterized in that the closure element (10) is in an at least double position ( a, b) of the solid paper material rests, at least in an open position, and that between these two layers (b, c) in the region of the opening (9) a rubber ring seal (11) is gripped. 2. Dust filter bag according to claim 1 or in particular according thereto, characterized in that the holding plate (11) in the region of the opening (9) consists of at least three fixed layers (a, b, c) arranged one above the other. 3. Dust filter bag according to one or more of the preceding claims, characterized in that a space is formed between two layers (a, c) in the region of the opening (9) for holding the closure element (10). 4. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the paper material is a cardboard-paper material. 5. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the closure element is a closure tab. 6. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that an opening edge region (9 ") of the middle layer (b) with respect to opening edges (9 ') of the top and bottom layer (a, c) is set back. 7. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the middle layer (b) has a larger recess associated with the opening (9) than the upper one top and bottom layer (a, c). 8. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the holding plate (1) is continuously formed at least three layers at the edge. 9. Dust filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the uppermost layer (a) also forms a holding bracket (19) and that the holding bracket (19) surrounds the opening (9).

Images