Patents by Inventor Antti Suoperä

Antti Suoperä 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).

  • Headbox of a paper/board machine by whose means the basis weight of the web can be regulated
    Patent number: 6432275
    Abstract: The invention concerns a headbox for a paper/board machine by whose means the basis weight of the web can be regulated. The headbox comprises a stock inlet header (Jl), which becomes narrower towards its end. Tubes (11a1, 11a2 . . . ) in a tube bank (11) open in the stock inlet header (J1) across the machine width, which tubes are connected with thickening elements (12a1, 12a2 . . . ) across the machine width, in which connection a flow (L1) is removed from the thickening element into the duct (D1) and said flow (L1) to be removed is regulated by means of a valve (V1, V2 . . . ). From the thickening element (12a1, 12a2 . . . ) a tube (14a1, 14a2 . . . ) for a flow (L2) of higher consistency is provided, which flow is passed further in the headbox.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: August 13, 2002
    Assignee: Metso Paper, Inc.
    Inventors: Jyrki Huovila, Petri Nyberg, Antti Suoperä, Tapani Nyman