Non-woven depth filter element
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United States of America Patent
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Mar 19, 2002
Grant Date -
N/A
app pub date -
Apr 21, 1999
filing date -
Apr 21, 1999
priority date (Note) -
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Abstract
A new non-woven depth filter element is formed in a continuous process whereby a mass of very fine diameter polymer filaments overlaid by mass of larger diameter polymer filaments are continuously accumulated on a spinning mandrel and advanced along and off of the mandrel by a press roller. An inner cylindrical surface of the cumulative filament mass forming the depth filter element is calendered, which facilitates insertion of a core member.
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