Patents by Inventor Hannu Kokkala

Hannu Kokkala 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).

  • Patent number: 7363730
    Abstract: A device (21) and method for removing a broken pulp web (27) from a pulp dryer and a maintenance platform (23) comprising such a device. The device (21) comprises an actuator (31), a pulling means (33) functionally coupled to the actuator and adapted to be driven by the actuator, and a gripping means (1, 11) coupled to the pulling means (33) and comprising means (4, 5) for engaging to the pulp web. The actuator is arranged to actuate the gripping means via the pulling means. The actuator is used to pull the gripping means and along with it, the pulp web out from the pulp dryer.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: April 29, 2008
    Assignee: Metso Paper, Inc.
    Inventors: Olli Huhtala, Hannu Kokkala
  • Publication number: 20060169428
    Abstract: A device (21) and method for removing a broken pulp web (27) from a pulp dryer and a maintenance platform (23) comprising such a device. The device (21) comprises an actuator (31), a pulling means (33) functionally coupled to the actuator and adapted to be driven by the actuator, and a gripping means (1, 11) coupled to the pulling means (33) and comprising means (4, 5) for engaging to the pulp web. The actuator is arranged to actuate the gripping means via the pulling means. The actuator is used to pull the gripping means and along with it, the pulp web out from the pulp dryer.
    Type: Application
    Filed: January 26, 2006
    Publication date: August 3, 2006
    Inventors: Olli Huhtala, Hannu Kokkala
  • Patent number: 6317999
    Abstract: A sealing nozzle is positioned in a blow box used in the drying section of a paper machine. The blow box is mounted on that side of the supporting fabric, which is away from the web at the opening gap between the supporting fabric and the cylinder and at a distance “D” from the supporting fabric. A passage is formed between the blow box and the supporting fabric, the passage having a negative pressure region having a border with a region outside the negative pressure region. The sealing nozzle is positioned in a wall of the blow box facing the passage at a distance “d” from the supporting fabric. The sealing nozzle includes: a pivotal sealing member mounted at the border, and a transverse support element, the sealing member pivotal about the transverse support element; and a separate nozzle part having at least one nozzle opening (e. g.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: November 20, 2001
    Assignee: Metso Paper, Inc.
    Inventors: Raimo Virta, Reijo Jokinen, Hannu Kokkala
  • Patent number: 6247247
    Abstract: A blow box used in the drying section of a papermaking machine and a method for sealing a pocket provided with a blow box, and a blow nozzle. The blow box is arranged to eject air away from the space between a wire and the blow box and/or maintain an underpressure zone in this space. In the interface between the desired underpressure zone and an outside volume, the blow box is provided with a sealing element, such as a blow nozzle, protruding towards the wire to a certain distance “d” seen from the wire, for forming a seal between the underpressure zone and the area remaining outside the underpressure zone. The sealing element is connected to the blow box so that the element may be moved away from the wire to a distance “D” by a push and/or by an actuator, the distance “D” being greater than the distance “d”.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: June 19, 2001
    Assignee: Metso Paper, Inc.
    Inventors: Seppo Yƶmaa, Matti Kurki, Raimo Virta, Reijo Jokinen, Hannu Kokkala
  • Patent number: 5557863
    Abstract: A blow device for a dryer section of a paper machine in which an air blowing is produced to support the paper web or equivalent. The device includes structure for defining an interior air space into which the air to be blown is passed through a duct communicating therewith and nozzle openings through which the air is blown to support the paper web or equivalent. The device also includes sets of equalizing plates through which the air is passed out of the air space into separate chamber spaces from which the air is passed into the nozzle openings.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: September 24, 1996
    Assignee: Valmet Corporation
    Inventor: Hannu Kokkala
  • Patent number: 4899463
    Abstract: Method and device in a cylinder dryer of a paper machine, in which a paper web is guided in connection with upper cylinders by using an upper wire and in connection with lower cylinders by using a lower wire. The wires are guided by faces of the respective drying cylinders and by guide rolls situated in spaces between the cylinders so that on an upper line of cylinders the web is pressed by the upper wire into direct drying contact with the faces of the upper cylinders, and the web is pressed by the lower wire into the faces of the lower cylinders in a lower line of the cylinders. In the method and in the device, the web is passed from one line of cylinders to the other over a certain distance as an open draw. A drying-air blowing is directed at the drying wires within an area of a line at which the respective drying wires are detached from the respective drying cylinders.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: February 13, 1990
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Pertti Heikkila, Markku Karlsson, Hannu Kokkala