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:
Jul. 03, 1990
Filed:
Feb. 20, 1985
Applicant:
Inventor:
Jonas A Lindhal, Domsjo, SE;
Assignee:
Mo och Domsjo Aktiebolag, Ornskoldsvik, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21D / ;
U.S. Cl.
CPC ...
162 55 ; 162149 ;
Abstract
Improved chemimechanical, particularly chemithermomechanical, pulp (CTMP), is produced by defibrating or refining wood chips to produce pulp, and then screening the pulp and separating out at least 30% by weight of the incoming fiber suspension as a first long-fiber fraction, and also separating out a first fine-fiber fraction, screening the first fine fiber fraction a second time, and separating out a second long-fiber fraction which is combined with the first long-fiber fraction to form a long-fiber fraction of improved properties, and a second fine-fiber fraction of improved properties.