Dual media filter

Details Dual media filter Dual media filter

1978-01-11

1979-10-30

Cuchlinski, Jr., William A.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

210492, 210493B, B01D 2706

Patent

active

041727975

ABSTRACT:
As exemplified by an automobile engine oil filter, the usual pleated filter paper is internally supported by an interpleated layer of high tear and tensile strength material which is substantially more flexible than the paper. With the ends of both layers anchored conventionally in the element's end caps rigidly held apart by the usual perforated center tube, the flexible material is subjected to a tensile stress when the paper attempts to move inwardly, the paper being thereby supported against rupturing or pleat tear. The flexible material thus functioning as a back-up layer for the paper, can be pretensioned to provide greater additional resistance to inward movement of the paper.

REFERENCES:
patent: 3348695 (1967-10-01), Rosaen
patent: 3867294 (1975-02-01), Pall et al.
patent: 4033881 (1977-07-01), Pall
patent: 4058463 (1977-11-01), Bartik

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