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:
Jun. 24, 2014
Filed:
Jun. 22, 2012
Esko Turunen, Äänekoski, FI;
Kari Kovasin, Rauma, FI;
Esko Turunen, Äänekoski, FI;
Kari Kovasin, Rauma, FI;
Metsa Fibre Oy, Metsa, FI;
Abstract
A method of defibring lignocellulose-bearing raw material with a polysulphide-bearing cooking liquor in a continuous digester. The cooking liquor is mixed into the raw material which is to be defibred before the cooking, and the cooking liquor is allowed to absorb into the raw material at a temperature which is at maximum approximately 130° C. The cooking liquor is then separated from the treated raw material, heated to a temperature of approximately 140-170° C., and mixed back into the treated raw material, possibly together with a fresh feed of cooking liquor, whereby the raw material is defibred to generate pulp which has a desired kappa number.