Patents by Inventor Paul A. Schwonke

Paul A. Schwonke 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).

  • Process for Making a Paperboard from a High Consistency Slurry Containing High Levels of Crosslinked Cellulosic Fibers
    Publication number: 20080251224
    Abstract: A process is described for manufacturing a paperboard from a high consistency slurry containing high levels of crosslinked cellulosic fibers by dispersing the fibers in a screen with a rotor in the screen and then passing the fibers through the screen basket with a hole diameter of at least 2 mm and forming the cellulosic fibers on a foraminous support. Another slurry of regular cellulosic fibers is deposited on at least one side of the first slurry during the formation process. The formed web is dewatered and dried.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 16, 2008
    Applicant: Weyerhaeuser Co.
    Inventor: Paul A. Schwonke
  • Process for making a paperboard from a high consistency slurry containing high levels of crosslinked cellulosic fibers
    Patent number: 7381298
    Abstract: A process is described for manufacturing a paperboard from a high consistency slurry containing high levels of crosslinked cellulosic fibers by dispersing the fibers in a screen with a rotor in the screen and then passing the fibers through the screen basket with a hole diameter of at least 2 mm and forming the cellulosic fibers on a foraminous support. Another slurry of regular cellulosic fibers is deposited on at least one side of the first slurry during the formation process. The formed web is dewatered and dried.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: June 3, 2008
    Assignee: Weyerhaeuser Company
    Inventor: Paul A. Schwonke