Filtering apparatus with pleated filtering material

Details Filtering apparatus with pleated filtering material Filtering apparatus with pleated filtering material

1989-03-20

1990-09-04

Fisher, Richard V.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

2104935, 2104941, 2104972, 55498, 55501, B01D 2706

Patent

active

049542559

ABSTRACT:
The filtering apparatus comprises at least one filtering material pleated in fanfold formation and arranged between the inflow or upstream side and the outflow or downstream side. Each pleat open toward the inflow or upstream side possesses a rounded base. The radius of the rounded base is in the range of 0.05 to 0.3 times the pleat depth. Each pleat open toward the outflow or downstream side terminates in an acute angle. A dimensionally stable insert is positioned within each pleat which is open toward the outflow or downstream side. The insert is preferably formed of flat material and comprises bilaterally protuberant deformations. The inserts are provided with bores at least at the protuberant deformations. Each of the inserts space the two confronting downstream sides of the associated filtering pleat and prevent that the filtering material, at high-pressure conditions, is pressed together and becomes impervious at the locations pressed against the inserts. In this filtering apparatus, filter cake consisting of filtered-out particles is easily separated and removed from the filtering material in a cleaning operation performed by a medium flowing from the outflow side to the inflow side of the filtering apparatus.

REFERENCES:
patent: 2914179 (1959-11-01), Foust
patent: 3302796 (1967-02-01), Downey
patent: 3385038 (1968-05-01), Dauis
patent: 3950256 (1976-04-01), Read
patent: 4488966 (1984-12-01), Schaeffer
patent: 4560477 (1985-12-01), Maldon
patent: 4619676 (1986-10-01), Turck
patent: 4652285 (1987-03-01), Greene

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