Patents by Inventor Ilkka Tirkkonen

Ilkka Tirkkonen 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 and Apparatus for Manufacturing Nonwoven Fabric
    Publication number: 20080256768
    Abstract: The invention concerns a method and apparatus for patterning a nonwoven fabric. The method according to the invention is characterized in that the web is supported in the patterning phase on a perforated cylinder to which a 3-dimensional pattern has been formed substantially without removing material (patterning cylinder) for accomplishing a corresponding 3-dimensional pattern to the nonwoven fabric. The apparatus according to the invention comprises an element supporting the web, a vacuum system and water nozzles in order to hydroentangle the fibre web or combined fibre webs. The apparatus is characterized in that the element supporting the web is of a kind of the said pattern cylinder.
    Type: Application
    Filed: June 20, 2005
    Publication date: October 23, 2008
    Inventors: Erkki Lampila, Topi Korsberg, Ilkka Tirkkonen