Patents by Inventor Aimo Närväinen

Aimo Närväinen 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).

  • Arrangement for a wire section of a paper or board machine
    Patent number: 7300553
    Abstract: A web is formed between two wire loops (13, 14), in a wire section of a paper or board machine, in connection with which dewatering elements (12, 17, 15, 28) are placed and in which water is drained from a stock suspension from between the two wires (13, 14). In the region of a twin-wire zone, a suction roll (15) is placed within one wire loop and a suction box (16) having a curved surface is situated in opposed relationship with the suction roll (15) on the wire loop. After the suction box (16), the web is guided, due to the effect of a vacuum of the suction roll (15), forwards on the surface of the wire loop of the suction roll (15).
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: November 27, 2007
    Assignee: Metso Paper, Inc.
    Inventors: Antti Poikolainen, Aimo Närväinen
  • Loading device including a loading member for supporting and dewatering a web forming wire
    Patent number: 6780285
    Abstract: The invention concerns a loading device for the dewatering a web-forming wire, which supports and/or loads the wire of a paper machine and scrapes water from the wire surface. The loading device is loaded by a pressure medium and includes a movable loading member and a fixed base member. The loading member includes a longitudinal groove which extends the length of the loading member and the base member includes a slide rail adapted to be received in the longitudinal groove for supporting the loading member. In order to eliminate jamming phenomenon of the loading member, the loading member is supported evenly in its position in a cross machine direction and it is adapted to move towards the wire and away from the wire with aid of rollers arranged between the slide rail and the internal walls of the loading member which define the longitudinal groove.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: August 24, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Antti Leinonen, Seppo Kiviranta, Aimo Närväinen, Jukka Pihlajasaari, Hannu Villgrén, Kari Lamminmäki, Atte Marttinen
  • Doctor equipment in connection with a roll/cylinder in a paper/board machine
    Patent number: 6547932
    Abstract: The invention relates to a doctor apparatus (10) in connection with a roll (T) in a paper or board machine. The doctor apparatus (10) comprises a doctor beam (12) of lightweight construction and that the doctor beam (12) is arranged to pivot on bearing means (13a1, 13a2 . . . ) (pivot movement arrow L1). In connection with the doctor beam there are loading members (14a1, 14a2), a relative linear movement taking place between the loading members (14a1, 14a2) and backup surfaces (12′, 15a′) when the doctor beam (12) is being oscillated.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: April 15, 2003
    Assignee: Metso Paper, Inc.
    Inventors: Antti Leinonen, Jouni Heiskanen, Kari Paloniemi, Kari Lamminmäki, Ilkka Rata, Ilkka Eskelinen, Samppa J. Salminen, Aimo Närväinen, Pentti Luoma, Jukka Samppala, Mika Saari, Reijo Hassinen