Filtering system utilizing rotational flow and angled pleated filter media and method for making slanted pleated filter media
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United States of America Patent
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-
Dec 29, 1992
Issued Date -
N/A
app pub date -
May 3, 1991
filing date -
Jun 25, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A filter cartridge for use in a fluid filtering system, constructed to induce rotational flow in the unfiltered fluid, includes a pleated filter sleeve in which the individual sleeves are slanted relative to the sleeve circumference in a direction opposite to the direction of the rotational flow fluid. The slanted pleats can be constructed by creasing a sheet of filter media at alternatingly shorter and longer widths to form pleats having relatively shorter front legs and relatively longer back legs. The shorter front legs bias the pleats in the counter-rotational direction. Apparatus for manufacturing the pleated sleeve includes a pleater roll having pleater wires spaced to form the alternatingly shorter and longer pleat widths.
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