Filter bag and method for the production thereof
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United States of America Patent
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Aug 23, 2011
Grant Date -
Aug 2, 2007
app pub date -
Oct 15, 2004
filing date -
Oct 17, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Described is a filter bag for a vacuum cleaner which may include a tubular bag with a closed free end area and an opposed, at least partially closed area as well as with a retaining plate. The bag is made from a bag material having at least one non-woven layer, and the at least partially closed area is folded forming a bottomPlies of the bag material which lie the one above the other are formed in areas, and is at least partially closed by a weld seam extending centrally in the bottom, the plies of the bag material which lie the one above the other being at least partially connected to one another.
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