Classifying – separating – and assorting solids – Sifting – Drum sifters
Reexamination Certificate
2001-01-26
2009-10-06
Mackey, Patrick H (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Drum sifters
C209S289000, C209S037000, C209S139100
Reexamination Certificate
active
07597200
ABSTRACT:
An apparatus for formation of a course of fibrous materials on a perforated forming wire mesh with an underlying suction box and an overlying fiber distribution box, in which a pair of rotating, perforated drum cylinders are provided for the delivery of a stream of air-fluidised fiber, which is then flung out down on to the wire mesh by the drawing-down of air by the suction box from the upper end of the distribution box, cover plates (18) is arranged at a distance below the upper level of the drum cylinders, which plates substantially shield-off the free flow of air down through the vertical spaces between the drums themselves and between the drums and the adjacent side walls of the distribution box.
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Browdy and Neimark , P.L.L.C.
Hageman Mark
Mackey Patrick H
Scan-Web I/S
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