Nonwoven layer for a filter and filter medium
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United States of America Patent
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Dec 20, 2011
Grant Date -
Jul 6, 2006
app pub date -
Dec 8, 2003
filing date -
Dec 6, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is directed to a nonwoven layer for a filter, in particular, for a vacuum cleaner bag, wherein at least one region of the nonwoven layer, the region having a predetermined thickness and a predetermined area, has an average pore size smaller than 50 μm and comprises fibers being bonded together such that a movement of the fibers relative to each other in a direction parallel to the surface of the layer is inhibited. The invention is further directed to a filter medium, in particular, for a vacuum cleaner bag, comprising a filter structure wherein a surface or an interface of the filter structure is provided with a filter paper layer having a smaller surface area than the filter structure.
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