Filter with delta wedge pleat

Details Filter with delta wedge pleat Filter with delta wedge pleat

1991-06-04

1992-07-07

Dawson, Robert A.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

2104932, 2104935, 55498, 55500, 55502, 55521, B01D 2706

Patent

active

051280396

ABSTRACT:
A filter cartridge comprising an elongated sheet of porous filter material folded into an array of primary pleats is further folded to define secondary pleats which are tucked between the primary pleats. The secondary pleats define tapered portions at the top and bottom of the filter media, thereby reducing the width of the pleats at the top and bottom thereof to a width less than the primary width of the pleats, to thereby minimize the amount of sealant required to seal the ends of the pleats. The secondary pleats also resist radial and circumferential collapse of the pleats during filtering.

REFERENCES:
patent: 2980208 (1961-04-01), Neumann
patent: 3640396 (1972-02-01), Brownell
patent: 3686837 (1972-08-01), Hopkins et al.
patent: 3859068 (1975-01-01), McLaren et al.
patent: 3937663 (1976-02-01), Bessiere
patent: 4151095 (1979-04-01), Wright
patent: 4452619 (1984-06-01), Wright et al.
patent: 4512891 (1985-04-01), Wright et al.
patent: 4710297 (1987-12-01), Suzuki et al.

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