B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/109
B01D 39/00 (2006.01) B01D 29/11 (2006.01) B01D 39/14 (2006.01) B01D 39/16 (2006.01) B01D 69/12 (2006.01) C02F 1/00 (2006.01) C02F 1/28 (2006.01) C10G 33/06 (2006.01) B01D 29/54 (2006.01) B01D 29/58 (2006.01)
Patent
CA 1319626
42488 CAN 3A FLEXIBLE FILTER ELEMENT EMPLOYING FILTERING SHEETS FORMED WITH BYPASS OPENINGS Abstract Disposable filter element, adapted for use in a high-pressure filter housing, has a plurality of layers of flexible filtering material, some layers being formed with openings through which a portion of the fluid can flow without being filtered, and at least one downstream layer of the filtering material being free from such openings. When all of the layers of filtering material have the same pore size, the total area of the openings in each layer is larger than that of the openings of any downstream layer. Each opening-containing layer of the filtering material removes part of the contaminant in the fluid. Interposed between adjacent opening-containing filtering layers is a layer of flexible transport material, and there is a layer of flexible prefiltering material positioned upstream of said filtering layers. The prefiltering material has a porosity to filter out from the fluid any particle that is substantially as large as the openings of the most upstream of the filtering layers to guard against an opening becoming blocked by such a particle.
576054
Minnesota Mining And Manufacturing Company
Smart & Biggar
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