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:
Aug. 11, 2020
Filed:
Feb. 23, 2017
Applicant:
Red Wire Oy, Tampere, FI;
Inventor:
Jouko Hautala, Tampere, FI;
Assignee:
RED WIRE OY, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21D 5/02 (2006.01); B01D 29/88 (2006.01); B07B 1/20 (2006.01); D21B 1/32 (2006.01);
U.S. Cl.
CPC ...
D21D 5/026 (2013.01); B01D 29/885 (2013.01); B07B 1/20 (2013.01); D21B 1/32 (2013.01);
Abstract
The present invention is directed to methods and apparatus for screening a pulp suspension where the pulp suspension is directed to a screening space, where a part of the fibres in the pulp is screened using a drum-type rotor. The residual pulp suspension is then directed to a dilution space where it is mixed with recirculated pulp flow and the pulp suspension in the dilution space will be screened. Resulting preliminary reject flow is directed to a mixing space where it mixes with a dilution flow. The recirculated pulp flow is then directed back to the dilution space.