Fluted filter medium and process for its manufacture
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United States of America Patent
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Aug 16, 2011
Grant Date -
Jul 27, 2006
app pub date -
Jan 31, 2003
filing date -
Jul 10, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A fluted filter medium (74) comprising a corrugated filter sheet, where each flute (120) has an end closure defined by a regular fold arrangement in the corresponding corrugation. Each regular fold arrangement has at least four folds. A process for manufacturing the fluted filter medium comprising deforming a portion of each corrugation to define at least one foldable tip, and folding the said tip in order to close the corrugation.
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