Liquid filter having improved extended polypropylene element

Details Liquid filter having improved extended polypropylene element Liquid filter having improved extended polypropylene element

1977-01-07

1978-08-01

Sever, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

55498, 55514, 55521, 55528, 210490, 210491, 210492, 210493B, 210502, 210505, 210508, 428181, 428286, 428296, B01D 3916

Patent

active

041041704

ABSTRACT:
An improved filter of the cartridge type having concentric inner and outer filter elements is disclosed. The elements are formed of non-woven polypropylene fibers. In a preferred embodiment the outer element is formed of a laminate including a supporting layer of a continuous filament and a filtering layer of randomly oriented polypropylene fibers. The outer element is pleated and the space between the elements is filled with particulate, activated charcoal. The axial ends of the filter components are encapsulated in plastisol end caps to secure them together, and to form a sealable working surface to be engaged by the filter housing.

REFERENCES:
patent: 3170826 (1965-02-01), Norton et al.
patent: 3252270 (1966-05-01), Pall et al.
patent: 3327859 (1967-06-01), Pall
patent: 3528546 (1970-09-01), McPherson
patent: 3867294 (1975-02-01), Pall et al.

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