Patents by Inventor Tore Sundberg

Tore Sundberg 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).

  • Method of producing visible, continuous streaks and/or delimited fields in paper
    Patent number: 5989389
    Abstract: The invention relates to a method of producing visible, preferably transparent or translucent, continuous streaks and/or delimited fields in paper in conjunction with forming a paper web in a paper machine. The method is characterized by essentially preventing dewatering of paper stock/paper fibres on one or more surfaces of a wire in the forming unit of a paper machine in conjunction with forming a paper web in the machine, and by applying a special stock that contains fibres which differ from the other fibre material deposited on the wire, optionally together with an arbitrary filler and/or binder. The invention also relates to a valuable document, such as a banknote, produced from the aforedescribed paper.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: November 23, 1999
    Assignee: AB Tumba Bruk
    Inventor: Tore Sundberg