Liquid purification or separation – Filter – Material
Reexamination Certificate
2005-09-06
2005-09-06
Walker, W. L. (Department: 1723)
Liquid purification or separation
Filter
Material
C210S488000, C210S496000, C210S497010, C210S502100, C210S503000, C210S505000, C156S167000, C156S171000, C156S173000
Reexamination Certificate
active
06938781
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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Aune Thomas M.
Kopp Clinton V.
Madsen Michael J.
Rolchigo Philip M.
Stifter Travis G.
Kinney & Lange , P.A.
Menon Krishnan S.
Osmonics, Incorporated
Walker W. L.
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