DE6812726U - DEVICE FOR FASTENING A FILTER BAG TO THE VACUUM CLEANER - Google Patents

Description

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Vorwerk & Co. 56 Wuppertal-Barmen, December 18, 1968 Electrical works KO Device for attaching a filter bag to the vacuum cleaner

The innovation relates to a device for attaching a filter bag, in particular a paper filter bag, directly or indirectly on the blower nozzle of a vacuum cleaner by means of a retaining ring.

For convenient and hygienic emptying of a dust filter on a vacuum cleaner, it is customary to use the outer protective t

filter to keep a filter bag made of paper, which, when it is filled with dust, is thrown away or destroyed. Such Pa- 7; pier filter bags are usually made from a paper web by gluing

ben the two long edges to a paper tube and after inserting Longitudinal folds were created by sealing one hose opening. For the loading

J fixation of such paper filter bags on the nozzle of a vacuum cleaner

f various devices have already become known. So there is a kind

t of fasteners in that the edge of the paper filter bag

is attached to the vacuum cleaner's elastic connector and clamped onto the blow connector by means of a holding ring of various designs that has been pushed over beforehand. Such designs have the naclrt-eil that the filter bag and the retaining ring represent two separate parts and thus the retaining ring can easily be lost. Furthermore, the handling of such filter bag fastening devices often leaves something to be desired.

It is also known to remove the retaining ring before the Filter bag on the nozzle or on the intermediate nozzle connected to it of the vacuum cleaner to the neck of the paper filter bag firmly and permanently, for example by gluing, stapling together with clips, Vulcanize, tape. Such designs allow the filter bag to be conveniently attached to the nozzle of the vacuum cleaner, but they have the disadvantage that they often do not have a sufficient seal between the retaining ring and the neck of the filter bag, so that here ier dust can escape undesirably from the paper filter bag. Also such fastening devices are expensive to produce and ^. your.

Vorwerk & Co.
Elektrowerke KG

The innovation has set itself the task of such devices improve and to provide a device for securing a filter bag, which in particular does not have the disadvantages mentioned above, but rather especially with a view to the fact that such filter bags, when they are filled with stagnation, are thrown away, can be created with little effort can and at the same time both a simple, dust-tight and operationally reliable attachment of the filter bag as well as a light and convenient Replacing the filter bag on the vacuum cleaner is guaranteed.

This is achieved according to the invention in that the open end of the filter bag the retaining ring τon engages around the outside in and the retaining ring with the filter bag is placed on the blow nozzle or on the intermediate nozzle connected to it.

In the case of this fastening device, the retaining ring is already in place before it is pushed on on the blower nozzle of the vacuum cleaner without any additional means with the filter bag captively connected, which is extremely manufacturing-wise is simple and inexpensive. Furthermore, according to this innovation Fixing device of the filter bag with the retaining ring also easy \ ind Can be plugged onto the blow nozzle in a dust-tight manner and just as convenient and easy to remove again when the filter bag is filled with dust and replaced shall be*

An advantageous embodiment of the innovation is that between the part of the filter bag that encompasses the retaining ring and the retaining ring is a tubular, known per se, in particular made of a thin plastic film existing non-return nozzle is supported. As a result, the tubular non-return nozzle is also in place without further fastening means its operating position and prevents the dust from falling out of the filter bag.

Furthermore, according to the innovation, it is advantageous if the retaining ring of The end of the filter bag encompassing the outside inwards protrudes beyond the retaining ring into the interior of the filter bag and is cut like a fringe is. Here, the fringes of the filter bag take on the further function of a so-called non-return valve, in that they are

Vorwerk & Co.
Elektrowerke KG

drive of the vacuum cleaner and the exit of the dust from the filter bag impede. This eliminates the need for the customary, separate check valve.

Finally, according to the innovation, it is advantageous if, as is known per se, the the end of the one-piece retaining ring facing away from the filter bag is beaded inwards, the retaining ring made of cardboard and the filter bag Paper with longitudinal folds is made. Due to this original flanging on the The existing cardboard retaining ring adheres easily and securely to the light conical blower neck of the vacuum cleaner and allowed without adherence to tight tolerances for the assigned diameter of the retaining ring and blower neck and despite the creases on the everted part of the filter bag, a firm and dust-tight fit.

ICin Ausführungsungsbeispie] the innovation is shown in the drawing and described in more detail below. Show it

1 shows a handle designed as an outer bag device

Vacuum cleaner in perspective

Fig. 2 is a broken longitudinal section through the

Filter bags with their fastening devices on an enlarged scale

FIGS. 3 and 4 show two embodiments similar to FIG. 2

The stick vacuum cleaner 1 shown in Fig. 1 has a blow nozzle 2 on the one made of fabric protective filter bag 3 and a paper filter bag 4 lying therein (Fig. 2, 3, 4) with the inclusion of an intermediate connector 5 are attached. The intermediate nozzle 5 pushed onto the blowing nozzle 2 has an annular collar 6 on which the open end of the protective filter bag 3 by a cooperating with a recess 7 of the collar 6 and the constriction 9 covered by a rubber ring 8 is held in a non-detachable manner. For easy and convenient insertion and removal of the paper filter bag 4 from the protective filter bag 3, this is sealed with a seal Longitudinal slot 20 is provided, which extends into the area of the fastening device of the paper filter bag 4 extends. On the free, conical,

Vorwerk & Co.
Elektrowerke KG

a self-locking and divided into successive weak stages Jacket having the end 10 of this intermediate connector 5 is through the open, everted hands 11 of the paper filter bag 4 held the retaining ring 12 attached. Here, the open end 11 of the paper filter bag engages around 4 the cold ring 12 from the outside to the inside, and by attaching it This retaining ring 12 on the end 10 of the intermediate connection 5 is the paper filter bag 4 firmly and reliably connected to this and thus indirectly to the blower 2. The retaining ring 12 is a Cardboard ring with an inwardly directed, bead-like UmbÖrdelung 13 the side facing away from the paper filter bag 4. As a result, the retaining ring 12 easily and securely adheres to the connecting piece 5 and ensures that there is no compliance narrow tolerances for the diameter of retaining ring 12 and connecting piece 5 assigned to one another and despite the folds 14 at the everted end 11 of the paper filter bag 4 a firm and dust-tight seat. The end 10 of the intermediate connection 5 has a non-return valve valve 15 on the inside, which prevents that when the vacuum cleaner is not in use, the dust gets into the interior of the vacuum cleaner 1 falls back. In the embodiment according to FIG. 3, between the open end 11 of the paper filter bag 4 that encompasses the retaining ring 12 and the retaining ring 12 is a tubular, made of a thin plastic film existing non-return nozzle 16 supported without additional fasteners. This non-return nozzle 16 prevents above all that when removing of the filter bag 4 or replacement of the same dust can escape.

As a further embodiment, FIG. 4 shows that the retaining ring 12 from the outside to the inside encompassing end 11 of the paper filter bag 4 protrudes beyond the retaining ring 12 into the interior of the paper filter bag 4 and is cut like a fringe. Here the fringes 17 take over the function a non-return valve in the paper filter bag 4 and replace the conventional, tubular non-return valve.

Claims (4)

Ill Mil Vorwerk & Co. Elektrowerke KG protection claims 1) Device for attaching a filter bag, in particular of a paper filter bag, on the blow nozzle of a vacuum cleaner by means of a retaining ring, characterized in that the open The end (11) of the filter bag (4) encompasses the retaining ring (12) from the outside to the inside and the retaining ring (12) with the filter bag (4) is slipped onto the blowing nozzle (2) or onto the intermediate nozzle (5) connected to it. 2) device for attaching a filter bag according to claim 1, characterized in that between the one encompassing the retaining ring (12) Part of the filter bag (4) and the retaining ring (12) is a hose-shaped, known per se, in particular a thin one Plastic film existing non-return nozzle (l6) is held without an additional fastening means. 3) device for attaching a filter bag according to claim 1, characterized in that the end (11) of the filter bag (4) encompassing the retaining ring (12) from the outside inwards via the retaining ring (12) protrudes into the interior of the filter bag (4) and is cut like a fringe. 4) device for attaching a filter bag according to claim 1, characterized in that, as is known per se, the end of the one-piece retaining ring (12) facing away from the filter bag (4) is beaded inwards, the retaining ring (12) made of cardboard and the filter bag (4) provided with longitudinal folds (14) made of paper.