Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1992-05-13
1994-05-31
Savage, Matthew O.
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
210489, 2104972, B01D 2939
Patent
active
053166787
ABSTRACT:
An improved filter cell is formed by sealing at least two layers of filter media with an interposed drainage support member between two identical edge seal rings. A flexible radial edge is produced that will not crack during its lifetime, including during manufacture, shipping and use. The edge seal rings and the drainage or support member are preferably formed of food grade polypropylene. The molten polypropylene formed by the friction welding of the two edge seal rings with respect to each other fills two cavities formed between the two edge seal rings to firmly secure two filter media disc covers around the entire periphery of the edge seal rings. Each edge seal ring is formed of an annular member having an annular ridge with a pointed terminal portion for engaging the opposed filter media disc cover to aid in retention of the filter media disc covers and drainage member between the edge seal rings. Molten polypropylene seals any gaps between the two edge seal rings to prevent lateral filtrate flow through the filter cell during use.
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Savage Matthew O.
Stavo Industries, Inc.
Walker W. L.
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