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:
May. 22, 2001
Filed:
Sep. 17, 1999
Applicant:
Inventor:
Björn Karlsson, Karlstad, SE;
Assignee:
Kvaerner Pulping AB, , SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/04 ; D21D 5/04 ;
U.S. Cl.
CPC ...
D21C 9/04 ; D21D 5/04 ;
Abstract
In a washing apparatus for washing cellulose pup, comprising a vertical, column-shaped washing vessel (,), and a screen unit (,) which is movable in the washing vessel, during a screening phase, at a first speed, from an upper position to a lower position, and, during a return movement, at a substantially higher speed, from the lower position to the upper position, there is a float body (,) which exerts a buoyancy force on the screen unit.