Device for cleaning fibrous suspensions for paper production

Details Device for cleaning fibrous suspensions for paper production Device for cleaning fibrous suspensions for paper production

2007-02-06

2009-10-06

Lithgow, Thomas M (Department: 1797)

Liquid purification or separation

Filter

With residue removing means or agitation of liquid

C210S415000, C209S250000, C209S273000, C209S306000, C162S055000

Reexamination Certificate

active

07597201

ABSTRACT:
A device for cleaning a suspension, preferably a fibrous suspension for paper production. The device includes a screen basket, on the exterior surface of which the suspension to be cleaned is supplied and from the interior surface of which the screened accepted stock is released. A housing surrounds the screen basket. The housing includes an inflow for the suspension to be cleaned, an accepted-stock outlet for the cleaned suspension and a reject outlet for impurities. A scraping device rotates on the outside of the screen basket about the screen basket axis and has scraper blades (foils) which scrape along the exterior surface of the screen basket. The scraping device comprises a drum with a cylinder surrounding the screen basket. The cylinder carries a plurality of foils on its inside facing the screen basket.

REFERENCES:
patent: 3029951 (1962-04-01), Cannon
patent: 3092578 (1963-06-01), Cannon et al.
patent: 3456793 (1969-07-01), Salomon
patent: 3545621 (1970-12-01), Lamort
patent: 3933649 (1976-01-01), Ahlfors
patent: 3939065 (1976-02-01), Ahlfors
patent: 4287055 (1981-09-01), Holz
patent: 4346007 (1982-08-01), Norman et al.
patent: 2908729 (1979-09-01), None
patent: 3023902 (1982-01-01), None

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