Patents Assigned to Korsnas Aktiebolag
  • Preparation exhibiting enzymatic activity, a method of producing the same, and applications thereof
    Patent number: 5677161
    Abstract: The invention relates to a preparation exhibiting enzymatic activity, which preparation has the capability of delignifying wood pulp at a temperature of at least 65.degree. C. and a pH of at least 9. Further, the invention relates to a method of producing said preparation by aerobically fermentating a selected Bacillus stearothermophilus strain. Furthermore, the invention relates to two isolated Bacillus stearothermophilus strains and mutants and variants thereof. The invention also relates to applications of the preparation of the invention, namely to a process comprising treatment of wood pulp with a preparation according to the invention, and a wood pulp and a fluff pulp treated with a preparation according to the invention, and also a paper, a board and a fluff made from a wood pulp treated with a preparation according to the invention.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 14, 1997
    Assignees: Korsnas Aktiebolag, The Technion Research and Development Foundation Ltd., Ramot-University Authority for Applied Research and Industrial Development Ltd.
    Inventors: Eugene Rosenberg, Yuval Shoham
  • .alpha.-L-arabinofuranosidase and xylanase from Bacillus stearothermophilus NCIMB 40221, NCIMB 40222 or mutant thereof for delignification
    Patent number: 5434071
    Abstract: The invention relates to a preparation exhibiting enzymatic activity, which preparation has the capability of delignifying wood pulp at a temperature of at least 65.degree. C. and a pH of at least 9. Further, the invention relates to a method of producing said preparation by aerobically fermentating a selected Bacillus stearothermophilus strain. Furthermore, the invention relates to two isolated Bacillus stearothermophilus strains and mutants and variants thereof. The invention also relates to applications of the preparation of the invention, namely to a process comprising treatment of wood pulp with a preparation according to the invention, and a wood pulp and a fluff pulp treated with a preparation according to the invention, and also a paper, a board and a fluff made from a wood pulp treated with a preparation according to the invention.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: July 18, 1995
    Assignees: Korsnas Aktiebolag, The Technion Research and Development Foundation Ltd., Ramot-University Authority for Applied Research and Industrial Development Ltd.
    Inventors: Eugene Rosenberg, Yuval Shoham
  • Manufacturing of kraft paper
    Patent number: 4741376
    Abstract: A process for manufacturing of kraft paper, especially kraft sack paper, on a multi-wire machine in which the web is dried by a combined cylinder drying and free drying and is optionally creped or micro-creped and optionally also glazed. By forming the web into two or more layers which are couched together in the wire part of the machine and subsequent shrinkage in order to obtain a stretch at break of at least 2.5% in the machine direction and of at least 5% in the tranverse direction, improved strength properties are provided.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: May 3, 1988
    Assignee: Korsnas Aktiebolag
    Inventors: Nils Landqvist, Sven Spangenberg, Torsten Jarnberg, Bengt Nordin