Vacuum Cleaner Filter Bag Having a Spacing Element
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United States of America Patent
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Aug 8, 2014
filing date -
Aug 9, 2013
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Abstract
The present invention relates to a vacuum cleaner filter bag made of nonwoven fabric which has a joint of the nonwoven fabric layers which seals the bag at the side at least at one place. At at least one place of the edge, a spacing means, which is configured by a double weld seam or reinforcing elements which are fitted in this region, is thereby included. A characterising feature of the vacuum cleaner filter bag according to the present invention is an increased three-point bending strength.
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