Three-dimensional non-woven filter
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United States of America Patent
Stats
-
Sep 6, 2005
Grant Date -
May 1, 2003
app pub date -
Oct 23, 2002
filing date -
Oct 23, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A non-woven depth filter cartridge includes a cylindrical mass of essentially continuous melt-blown polymer filaments and an essentially continuous traversing melt-blown polymer filament extending through the mass. The mass has a depth dimension, a longitudinal dimension, and a circumferential dimension. The mass includes a plurality of layers, each of the plurality of layers being generally oriented in the longitudinal and circumferential dimensions. The traversing filament is generally oriented in the depth dimension and extends through one or more layers of the mass. In one embodiment, the layers of the mass comprise concentric zones. The traversing filament is intentionally deposited and positioned to improve the physical properties of the filter cartridge.
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