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:
Oct. 23, 2007
Filed:
Mar. 19, 2002
Applicants:
Vidar Snekkenes, Karlstad, SE;
Mikael Lindstrom, Stockholm, SE;
Inventors:
Vidar Snekkenes, Karlstad, SE;
Mikael Lindstrom, Stockholm, SE;
Assignee:
Metso Fiber Karlstad AB, Karlstad, SE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21C 3/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
The continuous digester is for producing chemical pulp to a process for operating this digester and to a feedback system for the cooking liquid. By means of implementing cooking zones 1st, 2nd, 3rd, 4th and 5th down through the digester, that have a successively decreasing liquid-to-wood ratio, it is possible to obtain a more uniform alkali profile during the cooking. The alkali is kept high at the beginning by means of a high liquid-to-wood ratio, typically over 6:1, which exceeds conventional liquid-to-wood ratios, which are normally around 3.5-5.0:1.