The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
Oct. 13, 1999
Anders Bergdahl, Sundsbruk, SE;
Kjell Forslund, Sundsbruk, SE;
Lennart Svensson, Sundsvall, SE;
Björn Wikström, Sundsvall, SE;
Valmet Fibertech Aktiebolag, , CH;
Abstract
Screening apparatus is disclosed for separating fiber suspensions including a housing having an inlet for the fiber suspension, a stationary tubular screen having an inlet end adjacent to the housing inlet and an outlet end, and dividing the interior of the housing into a central chamber for receiving the fiber suspension from the inlet, and an outer accept chamber for receiving an accept fraction of the fiber suspension, a rotor journalled on the housing for rotation within the central chamber coaxially with the stationary tubular screen, a reject passage for receiving a reject portion of the fiber suspension at the outlet end of the stationary tubular screen, and an annular reject passage which has a radial width and a cross-sectional area at the outlet end of the stationary tubular screen for discharging the reject portion of the fiber suspension from the central chamber to the reject passage, the annular reject passage including an annular flange attached to the inner wall of the passage, resilient tubing disposed in the annular groove connectable to a source of pressure whereby the resilient tubing can be extended and contracted and an elastic ring surrounding the resilient tubing.