Classifying – separating – and assorting solids – Sifting – Concave and convex sifters
Reexamination Certificate
2007-01-30
2007-01-30
Rodriguez, Joseph (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Concave and convex sifters
C209S305000, C209S306000
Reexamination Certificate
active
10399973
ABSTRACT:
A screen cylinder (125) used for screening cellulosic fibrous material pulp in the pulp and paper industry incorporates first (66) and second (67) downstream surfaces (16) having contoured slopes that form a funnel entrance of the grooves (13) at the screen cylinder slots (17). The contoured construction of the screen cylinder (125) effects greatly enhanced utility compared to conventional milled and discrete element screen cylinders, including substantially avoiding the Coanda effect.
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Advanced Fiber Technologies
Heslin Rothenberg Farley & & Mesiti P.C.
Pietrangelo John
Rodriguez Joseph
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