A - Human Necessities – 47 – L
Patent
A - Human Necessities
47
L
183/84
A47L 9/14 (2006.01)
Patent
CA 1081623
ABSTRACT OF THE DISCLOSURE A bag for collecting dust for use in a vacuum cleaner is made of a mat which has been folded transversely of its mid- length dimension to form a bottom and opposed bag walls; the bag is provided with an opening near its upper end for suction of dust-laden air; the inner and outer faces of each bag wall are covered with a coherent non-woven fibrous web; the bag walls comprise a number of intermediate layers formed by laying up a series of rectangular sheets of non-woven fibrous web each of area less than the mat area, the sheets being generally parallel in each layer and the layer extending from the top of one bag wall around the bottom and to the top of the other bag wall; adhesive stripes of a penetrating adhesive such as a styrene or acrylic-based binder are applied to penetrate the covering layers and the intermediate layers, the stripes being spaced apart so that the bag walls are made up of transverse and parallel dust- gathering sections. A closing seam is also applied to the mat margins. Very economical, high-capacity, low suction pressure drop bags, e.g. of height 78 cm, width 57 cm, made of 14 intermediate layers, having 8 transverse adhesive strips and 17 collecting sections, are readily produced; tapes are affixed to the bag walls to enable inserting and removing the bag from a vacuum cleaner.
282960
Engen Anders
Filipkowski R.j.
LandOfFree
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