Patents by Inventor Ilkka K. Kartovaara

Ilkka K. Kartovaara 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).

  • Calendering machine for testing paper
    Patent number: 5215008
    Abstract: A paper test calendering machine is constructed with a pair of opposed guide rolls about which a web of paper or the like travels. A pair of opening an closing nip rolls are operable to exert pressure on the traveling web. A sensing device is operable to detect a deviation in the smooth web and to then activate an element to relieve the pressure on the web momentarily as the deviation passes.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: June 1, 1993
    Inventors: Ilkka K. Kartovaara, Erkka E. J. Valtonen