Patents by Inventor Teuvo Virkkunen

Teuvo Virkkunen 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).

  • Method for sizing a multi-ply fiber web and a forming section for a multi-ply fiber web
    Patent number: 11299857
    Abstract: A method for forming a multi-ply fiber web in which least part of the sizing of the multi-ply fiber web is provided by applying sizing agent in the form of foam by a curtain type application device (C10, C20) in between at least two layers of the multi-ply fiber web in the forming section. The invention also relates to a forming section for a multi-ply fiber web having at least one twin-wire forming part formed between a wire (10) for the bottom layer and a wire (20) for the top layer of the multi-ply fiber web, where the layers are joined, and the treated layers combined. The forming section has a curtain type application device (C10, C20) for applying sizing agent in the form of foam in between two layers of the multi-ply fiber web in the forming section of a multi-ply fiber web production line.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: April 12, 2022
    Assignee: Valmet Technologies, Inc.
    Inventors: Reijo Pietikäinen, Antti Poikolainen, Juan Cecchini, Teuvo Virkkunen
  • Method for Sizing a Multi-ply Fiber Web and a Forming Section for a Multi-ply Fiber Web
    Publication number: 20200115854
    Abstract: A method for forming a multi-ply fiber web in which least part of the sizing of the multi-ply fiber web is provided by applying sizing agent in the form of foam by a curtain type application device (C10, C20) in between at least two layers of the multi-ply fiber web in the forming section. The invention also relates to a forming section for a multi-ply fiber web having at least one twin-wire forming part formed between a wire (10) for the bottom layer and a wire (20) for the top layer of the multi-ply fiber web, where the layers are joined, and the treated layers combined. The forming section has a curtain type application device (C10, C20) for applying sizing agent in the form of foam in between two layers of the multi-ply fiber web in the forming section of a multi-ply fiber web production line.
    Type: Application
    Filed: October 14, 2019
    Publication date: April 16, 2020
    Applicant: Valmet Technologies, Inc.
    Inventors: Reijo Pietikäinen, Antti Poikolainen, Juan Cecchini, Teuvo Virkkunen
  • Method and device in headbox of paper, board or pulp drying machine
    Patent number: 5082530
    Abstract: The flow ratio of a paper machine headbox is adjusted by arranging such a by-pass out from the slice chamber that the flow conditions, such as the speeds and turbulences in all parts of the headbox remain unchanged regardless of the adjustment. The adjustment is carried out by opening the slice chamber wall or by using a separate discharging device positioned inside the slice chamber.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: January 21, 1992
    Assignee: Valmet-Karhula Inc.
    Inventors: Juha Keskiivari, Vesa Rommi, Timo Rosendal, Teuvo Virkkunen, Veijo Virtamo