Patents by Inventor Lena Bjornstrom

Lena Bjornstrom 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).

  • Fibrous material layer, method for its manufacture, and absorbent article comprising the material layer in question
    Patent number: 6998512
    Abstract: Fibrous material layer intended to be incorporated in an absorbent article. The layer (5) comprises at least two webs of tow fibers arranged on top of each other, which are bonded to each other into a laminate by means of a bonding pattern, and where one is corrugated and the other web is substantially smooth, wherein the corrugated web exhibits a more open structure in comparison to the smooth web. A method of manufacturing the layer (5) in question, in which method at least two separate webs (15a, b) of opened and into a layer spread-out tow are fed into a bonding station (20), which webs exhibit different web tensions and/or web speeds, and that the webs (15a, b) with maintained relative difference in web tension and/or web speed are bonded together in said bonding pattern (10) into a laminate.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: February 14, 2006
    Assignee: SCA Hygiene Products AB
    Inventors: Johan Wahlström, Lena Björnström, Leif Alm, Fredrik Krook, Sven-Erik Johansson
  • Fibrous material layer, method for its manufacture, and absorbent article comprising the material layer in question
    Publication number: 20030073967
    Abstract: Fibrous material layer intended to be incorporated in an absorbent article. The layer (5) comprises at least two webs of tow fibers arranged on top of each other, which are bonded to each other into a laminate by means of a bonding pattern, and where one is corrugated and the other web is substantially smooth, wherein the corrugated web exhibits a more open structure in comparison to the smooth web. A method of manufacturing the layer (5) in question, in which method at least two separate webs (15a, b) of opened and into a layer spread-out tow are fed into a bonding station (20), which webs exhibit different web tensions and/or web speeds, and that the webs (15a, b) with maintained relative difference in web tension and/or web speed are bonded together in said bonding pattern (10) into a laminate.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 17, 2003
    Inventors: Johan Wahlstrom, Lena Bjornstrom, Leif Alm, Fredrik Krook, Sven-Erik Johansson