DE8001640U1 - VACUUM CLEANER - Google Patents

Description

25-10-1979 1 ^ΡΗ Ν 9303

"Vacuum cleaner".

The innovation relates to a vacuum cleaner with a housing in which a dust bag can be located as well as a cover provided with a connection to a suction line to close the housing opening, with a hinged flap at the location of the housing opening, which in the closed position the Housing opening reduced to a gap through which an ' empty dust bag can be inserted in the folded state, the seal between the dust bag and the housing by clamping two long edge parts of the opening of the dust bag between two long edges that limit the gap and a pressure edge of the Lid takes place, with two inwardly folded short edge parts of the opening of the dust bag, seen from the inside of the dust bag, bear against the pressure edge.

Such a vacuum cleaner is known from DE-OS .22 $ h 772. In this known vacuum cleaner, wherein two hingeable flaps are present, the air resistance of the bag will limit the gap depending on more dust enters \ 20 de dust bag while vacuuming, large. This creates a greater pressure on the dust bag, which means that it is inflated, as it were. The dust bag is always pulled. As a result, the inwardly folded short edge parts of the dust bag will no longer rest properly on the pressure rard, as a result of which a small leak opening occurs. The fine-grained dust passes through this opening and contaminates the engine and can even damage it. If the said dust bag is a paper bag »the risk of leakage is even greater because the short edge parts to be jammed have sharp folds, which creates a leak between the short edge part of the bag and the pressure band at the point of the sharp fold ,

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25-10-1979

PMN 9303

The task of the innovation is now to »solve this disadvantage. The vacuum cleaner according to the innovation Assigns to solve this problem the indicator that _t the pressure edge in the place "Where lie the short edge parts of the StaUbbeuteis on the" print margin "aperturing" is give the entree to the space between the dust bag and the housing ·

The advantage here is »that due to the pressure difference, the short edge parts against the pressure edge of the Lids are sucked »so that a better density is obtained = will. With increasing pressure difference on the dust bag, the force with which the short edge parts against the Pressure margin will also increase.

A preferred embodiment of the vacuum cleaner according to the innovation »wherein said dust bag a A paper bag that is placed inside a cotton sack »has the mark that the Openings in the pressure edge are the passage openings of a chamber are, which is limited by the pressure edge of a cover plate, which chamber via an outlet opening with the Space between the paper bag and the cotton sack communicates. This will pollute the cotton sack avoided, whereby a better suction result is obtained.

An embodiment of the innovation is shown in the drawing and is described in more detail below. Show it

Fig. 1 is a diagrammatic, partially cut away Illustration of the attachment of a paper bag and a

3d cotton sack in the housing of a vacuum cleaner,

Fig. 2 is a section along the line II-II in Fig. 1,

3 shows a longitudinal section along the line III-III in Fig. 1.

The reference numeral 1 designates the housing of a vacuum cleaner, in which there is a cotton sack and a paper bag 3 * To close the essentially rectangular housing opening, k

25-10-1979

PHN 9303

of the housing a cover 5 can be arranged. This cover is provided with an opening 6 to which a connecting pipe (not shown) for a suction line can be connected * On the edge k of the housing 1 there is also a ring 7 * to which the cotton sack 2 is attached.

At the same time there are two flaps 8 and 9 which are each articulated by hinges 10 and 11 with one side of the ring 7 Connected are * The flaps 8 and 9 in the closed position reduce the housing opening to a gap 12j through the

1Ö the empty paper bag 3 can be inserted in the folded state. In Fig. 2, the folded paper bag is denoted by a dashed line 3a. The long edge parts 13 and Ik of the paper bag rest on the edges 15 and 16 of the flaps 8 and 9, respectively.

The dust bag is sealed by arranging the cover 5 on the ring 7. For this purpose, the cover is provided with a pressure edge 17 in the form of a half cylinder with an opening 6 in the middle for connection to a suction line. After the lid has been placed on the housing, the long edge parts 13 or 1 k of the paper bag are clamped between the flap edges 15 or 16 and the cylindrical surface of the pressure edge 17. At the same time, the short inwardly folded edge parts 18 and 19 of the paper bag are tightened over the cylinder surface. After switching on the vacuum cleaner, the paper bag is inflated and assumes the shape as indicated in FIG. 2 by the line 3. When vacuuming, the more dust gets into the paper bag, the greater the air resistance of the bag, so that more and more of the bag is pulled. This creates a small leakage gap between the short edge parts of the bag and the cylinder surface of the pressure edge 15, through which the fine-grained dust that contaminates the cotton sack 2 passes. In addition, the paper bag 3 has in the middle of the short edge parts 18 and a sharp fold, as a result of which these edge parts often do not rest tightly enough on the cylinder surface at the point of the sharp fold. This leakage problem is solved according to the invention in that the pressure edge 17 on the

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4 I · ·

PHN 9503

Place where the short edge parts 13 and 1k of the paper bag lie against the cylinder surface with openings 20 or provided, which give access to a chamber 22 or 23. These chambers are each connected to the space 26 between the paper bag 3 and the cotton sack 2 via outlet openings Zk and 25, respectively. The chambers 22 and 23 are delimited by the inside of the cylinder surface of the pressure edge and a cover plate 27 1 Since the pressure inside the paper bag is greater than the pressure in the space 26 when the vacuum cleaner is in operation, the short edge parts 18 and 19 of the paper bag are against the cylinder surface of the pressure edge 17 is sucked, so that there is a good seal ent.

Is a paper bag full; so you can after distance of the lid 5 the long edge parts I3 and I ^ des Fold the paper bag against each other and remove the paper bag from the housing. The flaps 8 and 9 hinges thereby upwards.

Claims (2)

25-10-1979 1 PHN 9303 PROTECTION CLAIMS: 1. Vacuum cleaner with a housing that can hold a dust bag, si: like one with one with one Connection to a suction line provided cover for closing the housing opening, wherein at the point of The housing opening has a hinged flap, which in the closed position the housing opening to form a gap reduced, through which an empty bag can be inserted in the folded state, with the seal between the dust bag and the housing by clamping two long edge parts of the opening of the dust bag between two long edges that delimit the gap and one pressure edge of the lid, with two folded inwards short edge parts of the opening of the dust bag, seen from the inside of the dust bag, rest against the pressure edge, characterized in that the printing edge on the Place where the short edge parts of the dust bag rest against the pressure edge, are provided with openings that allow access to the space between the dust bag and the case. {) 20 2. The vacuum cleaner of claim 1, wherein said dust bag is a paper bag placed inside a cotton sack, characterized in that the Openings in the pressure edge are the through openings of a Chamber are that through the Dn'ckrand and a cover plate is limited, which chamber has an exit opening with connected to the space between the paper bag and the cotton sack. 30th