Zoned pressure screen
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United States of America Patent
Stats
-
Dec 5, 2000
Grant Date -
N/A
app pub date -
May 14, 1999
filing date -
Nov 14, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Pressure screening apparatus for screening a suspension of papermaking stock employing an enclosing housing and a cylindrical screen, with a drum type rotor, has the screen divided or formed with axially spaced annular screening zones and a corresponding number of annular reject collection areas, one for each screening zone. The collection areas are positioned so as to receive rejects from one of the screening zones only, while a rotor is formed with outlet openings that apply stock suspension to selected ones of the screening zones so that there is no mixing of rejects between screening zones, and each screening zone receives stock suspension for screening independently of the other screening zones.
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