Pleated liquid filter having zones of different filtration

Details Pleated liquid filter having zones of different filtration Pleated liquid filter having zones of different filtration

1992-05-28

1994-01-04

Dawson, Robert A.

Liquid purification or separation

Filter

Vented

2104935, 2104972, 55500, 55521, B01D 2706

Patent

active

052757293

ABSTRACT:
A filter element incorporates a filter medium formed in one example by two strips of paper which are rolled about a center tube so that the medium in section, has a zig-zag configuration. Apertures are provided to allow the passage of air from the pockets defined by the paper.

REFERENCES:
patent: 4038194 (1977-07-01), Luceyk et al.
patent: 4303530 (1981-12-01), Shah et al.
patent: 4555342 (1985-11-01), Grant
patent: 4734195 (1988-03-01), Lhuillier et al.
patent: 4744902 (1988-05-01), Taki et al.
patent: 4824564 (1989-04-01), Edwards et al.
patent: 4877526 (1989-10-01), Johnson et al.
patent: 4925561 (1990-05-01), Ishii et al.
patent: 5071555 (1991-12-01), Enbom
patent: 5147541 (1992-09-01), McDermott, Jr.

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