Patents by Inventor Gunnar Edwardson

Gunnar Edwardson 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).

  • Patent number: 6835192
    Abstract: An absorbent article such as a diaper or an incontinence protector, comprising at least one liquid storage region (2, 3) with high absorption capacity and at least one wicking layer (4) which overlaps at least a substantial part of the liquid storage region and which has greater liquid dispersion ability than the storage region. The wicking layer (4) is intended to disperse liquid collected locally in the article over the liquid storage region (2, 3). The aim of the invention is to improve liquid dispersion in absorbent articles. The invention is characterized in that liquid-impermeable portions (5, 6) are arranged at separate places in the article along sections of overlapping parts of the wicking layer (4) and the liquid storage region (2, 3) in order to prevent the transfer of liquid over said parts from the wicking layer to the storage region.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: December 28, 2004
    Assignee: SCA Hygiene Products AB
    Inventors: Ted Guidotti, Roy Hansson, Urban Widlund, Gunnar Edwardson, Peter Blomström, Eje Österdahl
  • Patent number: 6818166
    Abstract: Method of forming a fiber web (210) intended for use in absorbent products, such as sanitary towels, by air-laying fibers. Separate air flows containing fibers are fed to a number n of different mat-forming wheels (160, 170, 180), where n is a whole number which is at least 2. Separate web layers (161, 171, 181) are formed on each mat-forming wheel. The fiber web (210) is formed by virtue of said web layers being combined downstream of the mat-forming wheels to form a common fiber web which is imparted very great manufacturing accuracy by virtue of the manufacturing method. The manufacturing speed and thus the web speed can be very high, and the desired manufacturing accuracy at the web speed concerned is achieved by selecting a sufficiently great number n of mat-forming wheels. The invention also relates to a fiber web manufactured according to the method.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: November 16, 2004
    Assignee: SCA Hygiene Products AB
    Inventors: Gunnar Edwardson, Claes Göransson
  • Publication number: 20020168909
    Abstract: Method of forming a fiber web (210) intended for use in absorbent products, such as sanitary towels, by air-laying fibers. Separate air flows containing fibers are fed to a number n of different mat-forming wheels (160, 170, 180), where n is a whole number which is at least 2. Separate web layers (161, 171, 181) are formed on each mat-forming wheel. The fiber web (210) is formed by virtue of said web layers being combined downstream of the mat-forming wheels to form a common fiber web which is imparted very great manufacturing accuracy by virtue of the manufacturing method. The manufacturing speed and thus the web speed can be very high, and the desired manufacturing accuracy at the web speed concerned is achieved by selecting a sufficiently great number n of mat-forming wheels. The invention also relates to a fiber web manufactured according to the method.
    Type: Application
    Filed: April 19, 2002
    Publication date: November 14, 2002
    Inventors: Gunnar Edwardson, Claes Goransson