Patents by Inventor Torsten Jarnberg

Torsten Jarnberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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