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. 20, 2002
Filed:
Feb. 20, 1997
Applicant:
Inventors:
Petri Silenius, Kirkniemi, FI;
Markku Leskelä, Lohja, FI;
Johan Gullichsen, Hirsijärvi, FI;
Esa Halinen, Helsinki, FI;
Assignee:
M-Real Oyj., Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 1/770 ; D21H 1/767 ; D21H 1/763 ;
U.S. Cl.
CPC ...
D21H 1/770 ; D21H 1/767 ; D21H 1/763 ;
Abstract
The invention relates to a procedure for adding a filler into a pulp based on cellulose fibers, in which the pulp is fluidized and the filler is added into it. Preferably the pulp is stirred in the fluidized state while the filler is being added. The pulp is preferably at a medium consistency when the filler is being added. Preferably the filler added into the pulp is calcium hydroxide and the calcium carbonate is precipitated with carbon dioxide.