Pleated aligned web filter
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United States of America Patent
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Mar 27, 2012
Grant Date -
Mar 4, 2010
app pub date -
Sep 3, 2009
filing date -
Apr 5, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A filter element in the form of a nonwoven self-supporting filtration web having rows of folded or corrugated spaced-apart pleats, the web containing continuous thermoplastic fibers a majority of which are aligned at 90°±20° with respect to the row direction. The filter element can be made by forming rows of pleats in such a nonwoven web and cutting the web to a desired size and shape. The filter elements can provide improved mechanical and filtration properties and can exhibit reduced susceptibility to pleat deformation and the loss of space between pleats.
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