Screening apparatus for paper making stock

Details Screening apparatus for paper making stock Screening apparatus for paper making stock

1991-07-08

1993-06-22

Jones, W. Gary

Paper making and fiber liberation

Apparatus

162 55, 162380, 209273, D21C 908

Patent

active

052214370

ABSTRACT:
Screening apparatus for separately removing knots and heavy reject particles from paper making stock comprises a generally cylindrical vertical housing having the interior thereof separated by a cylindrical perforated screening member into an annular screening chamber and an accepts space on the outer and inner sides of the screening cylinder respectively. Separate outlets for light and heavy reject particles are located at the top and bottom of the screening chamber, the supply flow of feed stock enters the screening chamber at the bottom thereof, and special provision is made to insure that maximum separation of the knots and other lighter reject particles from the heavy reject materials will be effected within the screening chamber with minimum contact with the screening cylinder itself.

REFERENCES:
patent: 3174622 (1965-03-01), Lamort
patent: 3437204 (1969-04-01), Clarke-Pounder
patent: 3581903 (1971-06-01), Holz
patent: 4166028 (1979-08-01), Weber
patent: 4252641 (1981-02-01), Martin
patent: 4991720 (1991-02-01), Hoglund et al.
patent: 5009774 (1991-04-01), LeBlanc
"The Bird Pressure Knotter" Sep. 1980.

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