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:
Dec. 09, 2014
Filed:
Apr. 21, 2011
Applicants:
Sakari Saastamoinen, Hämeenlinna, FI;
Pentti Virtanen, Valkeakoski, FI;
Inventors:
Sakari Saastamoinen, Hämeenlinna, FI;
Pentti Virtanen, Valkeakoski, FI;
Assignee:
Nordkalk Oy Ab, Pargas, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method of manufacturing paper or cardboard, wherein paper or board pulp is diluted with an aqueous composition, which is formed from colloidal-size particles of carbonate and bicarbonate, and other states of carbonate in an aqueous solution, so that the pH in the aqueous solution remains essentially at a value of 6.0-8.3 during the formation, and water is removed from the pulp by draining, pressing, and drying. The invention also relates to a method of manufacturing the aqueous composition used for this purpose.