Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension and sifting
Patent
1994-11-03
1995-07-04
Bollinger, David H.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension and sifting
209235, 209250, 209268, 209281, B07B 900
Patent
active
054292476
ABSTRACT:
Method and apparatus for screening peat moss material. The method comprises the steps of forming an aqueous slurry of peat moss material and flowing the slurry on a screen to separate fines from coarser particles in the slurry. A spray of relatively large water drops is directed at the slurry to agitate the coarser particles blocked by the screen in order to dislodge fines adhering thereto, whereby the fines freed from the coarser particles are allowed to egress the slurry through the screen. The water spray also has the effect of clearing the screen of fines which clog the screen openings. The invention also comprehends a method and apparatus for screening peat moss material, comprising the steps of flowing an aqueous slurry of peat moss material on a sieve to extract from the slurry excessively large particles, and washing the rejects remaining on the sieve to dislodge therefrom smaller particles of acceptable size which are returned to the slurry.
REFERENCES:
patent: 1198404 (1916-09-01), Ballantine
patent: 2317430 (1943-04-01), Ayers et al.
patent: 2826370 (1958-03-01), Weston
patent: 4257878 (1981-03-01), Fishback et al.
patent: 4325819 (1982-04-01), Altizer
patent: 4437982 (1984-03-01), Wasson
Audet Jacques
Cadieux Serge
Dery John
Lemay Martin
Roy Martin
Bollinger David H.
Johnson & Johnson Inc.
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