Patents by Inventor Pasi Ahvenainen

Pasi Ahvenainen 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).

  • Apparatus for leading a web threading tail over an empty space
    Patent number: 7264693
    Abstract: An apparatus for leading a web threading tail over an empty space formed between two surfaces, between which the apparatus (10) is arranged. The apparatus (10) includes a belt loop (28) permeable by air, which is supported by turnover rolls (29, 30). Within the belt loop (28) at least one foil strip (31) is arranged for creating a vacuum effect in the part of the belt loop (28) that transports the web threading tail (16) from the surface preceding the empty space, and to lead it to the following surface, a vacuum effect is arranged in connection with the first turnover roll (29) of the turnover rolls (29, 30).
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: September 4, 2007
    Assignee: Metso Paper, Inc.
    Inventors: Pasi Ahvenainen, Veli-Pekka Koljonen, Matti Lehtonen, Ari Mankki, Mika Ollikainen, Eija Kinnunen, legal representative, Pekka Hietanen, deceased
  • Method and system for maintaining runnability in a paper or board machine
    Publication number: 20060096726
    Abstract: A method and system for maintaining runnability in a paper or board machine, which machine for making paper or board includes two or more successive section complexes, such as a web formation section, a press section, a drying section and a finishing device, and wherein at the section complex (i) cleaning measures are carried out, (ii) the cleanness level is checked, (iii) if the cleanness level does not meet the criteria established for it, the procedure continues from step (i), otherwise, (iv) the cleanness level is accepted. Checking of the cleanness level is performed by using computer vision and the observations obtained by computer vision are compared with a criterion value established to correspond with the required cleanness level, and based on this value the procedure either continues with cleaning measures (i) or the cleanness level is accepted (iv).
    Type: Application
    Filed: March 25, 2003
    Publication date: May 11, 2006
    Applicant: Metso Paper, Inc.
    Inventors: Pasi Ahvenainen, Jari Kielinen, Veli-Pekka Koljonen, Jari Lampinen, Pekka Hietanen, Eija Kinnuen
  • Apparatus for leading a web threading tail over an empty space
    Publication number: 20040244217
    Abstract: An apparatus for leading a web threading tail over an empty space formed between two surfaces, between which the apparatus (10) is arranged. The apparatus (10) includes a belt loop (28) permeable by air, which is supported by turnover rolls (29, 30). Within the belt loop (28) at least one foil strip (31) is arranged for creating a vacuum effect in the part of the belt loop (28) that transports the web threading tail (16) from the surface preceding the empty space, and to lead it to the following surface, a vacuum effect is arranged in connection with the first turnover roll (29) of the turnover rolls (29, 30).
    Type: Application
    Filed: April 9, 2004
    Publication date: December 9, 2004
    Inventors: Pasi Ahvenainen, Veli-Pekka Koljonen, Matti Lehtonen, Ari Mankki, Mika Olilkainen, Pekka Hietanen, Eija Kinnunen