Dust filter bag for a vacuum cleaner

Details Dust filter bag for a vacuum cleaner Dust filter bag for a vacuum cleaner

1996-08-06

1998-06-16

Smith, Duane

Gas separation

Flexible or collapsible bag type

Valved, self-closing, or apparatus contained bag closing means

15347, 15350, 15352, 55369, 55374, 55378, 55DIG2, B01D 4602

Patent

active

057662835

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a dust filter bag for a vacuum cleaner, having a mounting plate comprising a card-paper material, to which mounting plate a dust bag is connected, for example by gluing, which mounting plate has a sealingly closable opening for a suction tube of a vacuum cleaner, the opening being closable by a separate closure member which is displaceable from an open disposition into a closed position, the closure member being displaceable between two layers.
A dust filter bag of this kind is known from German Published Patent Specification 2 407 478. In this there is shown a dust filter bag, the opening of which for a suction tube of a vacuum cleaner is closable by means of a foldable paper strip. This foldable paper strip is located between two layers consisting of card in such a manner that one end of the paper strip is secured to the lower fixed layer in the region of a fold, for example by gluing. The other free end of the paper strip projects out beyond the contour of the layers, to form a grasping region. The two layers have circular openings for the suction tube of the vacuum cleaner. The paper strip also has a circular opening, which in the open disposition of the dust filter bag is aligned axially with the openings of the fixed layers In order to close the opening of the dust filter bag, the free end of the paper strip is pulled outwardly, whereby the folded strip is partially separated. The opening in the paper strip thus moves away from the region of the openings in the two fixed layers, whereby the opening of the dust filter bag is closed. There exists in this case no possibility, because of the construction, of reopening a dust filter bag which has already been closed, by reversing the displacement of the paper strip. In order to reuse a dust filter bag of this kind after an unintentional closure of the opening, there exists in this case only the possibility of destroying the paper strip in the region of the openings in the two fixed layers.
In addition, a dust filter bag provided with a mounting plate having a sealingly closable opening in known from U.S. Pat. No. 2,864,462. In this case also a closure strip is located between two fixed layers, the dust bag being secured to the lower fixed layer. The closure strip extends longitudinally over the entire length of the two layers. In the open disposition of the opening for the suction tube of a vacuum cleaner, a further opening in the closure strip is associated with the openings of the two fixed layers in the axial direction. For closing the opening for the suction tube, a peripherally open recess is provided in the upper layer, through which the closure strip may be gripped. If the opening of the dust filter bag for the suction tube is to be closed, the closure strip is gripped in the region of the strip projecting into the recess of the uppermost layer and is then drawn out of the region between the two fixed layers to a sufficient extent for the opening of the closure strip to leave the region of the two fixed layers.
In the two abovementioned known solutions, the closure strip extends out over the contour of the respective mounting plate in the closed disposition of the filter bag.
It is an object of the present invention to provide a dust filter bag for a vacuum cleaner of the kind in question which will be technically more advantageous from the point of view of handling.


SUMMARY OF THE INVENTION

By the construction, of the invention a dust filter bag for a vacuum cleaner is provided, the opening of which, in a mounting plate region for a suction tube of a vacuum cleaner may be both closed and also opened by means of a closure member, the closure member not extending over the outer edges of the mounting plate in either of the two end positions and also not extending over these outer edges in any intermediate position. This is achieved by the closure member being substantially fully accommodated within an outer contour of the mounting plate in the closed position and in the open disposition and by

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patent: 5472460 (1995-12-01), Schmierer
patent: 5472465 (1995-12-01), Schmierer

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