Patents by Inventor Gustaf Per-Arne Nyman

Gustaf Per-Arne Nyman 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).

  • Thermal roll for papermaking with a fluid circulation system and method therefor
    Patent number: 6683284
    Abstract: A thermal roll for efficiently transferring heat to or from a web is provided. The thermal roll includes a rotatable outer shell having a cylindrical outer mantle and a stationary inner shell within the rotatable outer shell. An annular space is defined between an inner surface of the rotatable outer shell and an outer surface of the stationary inner shell. The annular space of a relatively low volume is filled with a heat exchange fluid, such as oil or water, that exchanges heat with a fibrous web through the mantle of the rotatable outer shell. The low volume of the annular space enables high heat transfer rates to the web and quick and efficient changes to the temperature of the heat exchange fluid. The thermal roll is adaptable for use as various types of rolls, such as calender rolls, press rolls, drying cylinders, and Yankee cylinders.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: January 27, 2004
    Assignee: Metso Paper Karlstad AB
    Inventors: Gustaf Per-Arne Nyman, Johnny Ånerud
  • Thermal roll for papermaking with a fluid circulation system and method therefor
    Publication number: 20030178406
    Abstract: A thermal roll for efficiently transferring heat to or from a web is provided. The thermal roll includes a rotatable outer shell having a cylindrical outer mantle and a stationary inner shell within the rotatable outer shell. An annular space is defined between an inner surface of the rotatable outer shell and an outer surface of the stationary inner shell. The annular space of a relatively low volume is filled with a heat exchange fluid, such as oil or water, that exchanges heat with a fibrous web through the mantle of the rotatable outer shell. The low volume of the annular space enables high heat transfer rates to the web and quick and efficient changes to the temperature of the heat exchange fluid. The thermal roll is adaptable for use as various types of rolls, such as calender rolls, press rolls, drying cylinders, and Yankee cylinders.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Applicant: METSO PAPER KARLSTAD AB
    Inventors: Gustaf Per-Arne Nyman, Johnny Anerud