Liquid purification or separation – Processes – Separating
Patent
1992-05-15
1994-05-03
Dawson, Robert A.
Liquid purification or separation
Processes
Separating
210230, 210231, 210359, 210387, 210504, 210509, 210489, 210508, 55367, B01D 3700, B01D 3300
Patent
active
053085086
ABSTRACT:
A depth filtration method employing a depth filter media sheet, a method of forming the depth filter media sheet and the structure of the depth filter media sheet are described wherein the depth filter media sheet is formed from a wet strength layer and a filter septum layer, the filter septum layer being substantially thicker than the wet strength layer and being formed as a matrix from at least one fiber selected to provide substantial loft and pore structure throughout the filter depth of the filter septum layer, the wet strength layer and the filter septum layer being arranged adjacent each other and preferably bonded together with a lateral surface of the filter septum layer being substantially totally exposed for receiving fluid to be filtered with the porous matrix of the filter septum layer being available to receive and capture particulate solids from the fluid, the filter septum layer also preferably including a second fiber or additional fibers selected in combination with the first fiber for defining and maintaining pore structure within the filter septum layer.
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U.S. Patent Re. 24,081, Issued Oct. 25, 1955.
Bucher John A.
Dawson Robert A.
Fortuna Ana M.
Womack International, Inc.
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