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    31.
    发明专利
    未知

    公开(公告)号：DE69707256T3

    公开(公告)日：2009-07-16

    申请号：DE69707256

    申请日：1997-06-10

    Applicant: METSO PAPER INC

    Inventor： ODELL MICHAEL ,  VERKASALO LAURI

    IPC: D21F1/00 ,  D21F7/06 ,  D21F9/00 ,  D21F9/02

    Abstract: A roll and blade gap former for a paper machine having first and second wires guided in a respective loop and defining a twin-wire forming zone, a forming gap in which the first and second wires converge before the twin-wire zone, a headbox including a slice channel having a slice opening through which a stock suspension jet is fed into the forming gap to form a web between the wires, and drainage and forming elements arranged in the twin-wire zone for removing water from the web. To provide an improvement in the control of the Z-direction properties of the web, the former includes turbulence generating vanes arranged in the slice channel in the headbox to cause turbulence in the stock suspension jet upon its discharge from the slice opening into the forming gap and a first forming roll arranged in the twin-wire zone and which constitutes the first drainage and forming elements in the twin-wire zone after the forming gap. A run of the twin-wire zone after the forming gap is curved over a wrap angle sector of the first forming roll which is less than about 25 DEG . The forming and draining elements produce a pulsating pressure effect on the web after the curved run of the twin-wire zone over the wrap angle sector of the first forming roll. A method for controlling the anisotropy of web formed in a roll and blade former is also described.

    34.
    发明专利
    未知

    公开(公告)号：DE69916127T2

    公开(公告)日：2004-09-02

    申请号：DE69916127

    申请日：1999-12-23

    Applicant: METSO PAPER INC

    Inventor： HUOVILA JYRKI ,  ODELL MICHAEL

    IPC: D21F7/06 ,  D21F1/02 ,  D21F1/08 ,  D21F1/66 ,  D21F1/00

    Abstract: The invention concerns the short circulation of a paper or board machine and in particular a simplified process arrangement for the short circulation, which arrangement comprises a metering system (20) for the stock (M) or stocks, pumps (110, 130, 170), a headbox (150), and a wire part (160) as well as a pipe system interconnecting the devices, with means of regulation, and in which arrangement a high-consistency stock (3) is fed into the headbox (150), and the white water (4) recovered from the wire part (160) is fed by means of a diluting pump (170) into the headbox (150) so that diluting of the stock suspension is carried out in the headbox.

    35.
    发明专利
    未知

    公开(公告)号：DE69916127D1

    公开(公告)日：2004-05-06

    申请号：DE69916127

    申请日：1999-12-23

    Applicant: METSO PAPER INC

    Inventor： HUOVILA JYRKI ,  ODELL MICHAEL

    IPC: D21F7/06 ,  D21F1/02 ,  D21F1/08 ,  D21F1/66 ,  D21F1/00

    Abstract: The invention concerns the short circulation of a paper or board machine and in particular a simplified process arrangement for the short circulation, which arrangement comprises a metering system (20) for the stock (M) or stocks, pumps (110, 130, 170), a headbox (150), and a wire part (160) as well as a pipe system interconnecting the devices, with means of regulation, and in which arrangement a high-consistency stock (3) is fed into the headbox (150), and the white water (4) recovered from the wire part (160) is fed by means of a diluting pump (170) into the headbox (150) so that diluting of the stock suspension is carried out in the headbox.

    38.
    发明专利
    未知

    公开(公告)号：FI109299B

    公开(公告)日：2002-06-28

    申请号：FI20010129

    申请日：2001-01-22

    Applicant: METSO PAPER INC

    Inventor： ODELL MICHAEL

    IPC: D21F9/02 ,  D21F1/52 ,  D21F9/00 ,  D21F1/00

    Abstract: A twin-wire former in a paper machine has two forming wire loops (10, 20), which define between themselves a twin-wire zone. At least one dewatering box (30) is located inside one of the wire loops (10, 20) to remove water through the wire from a web (W) being formed. At least one loading blade (40) is located opposite the dewatering box (30) inside the other wire loop (20; 10) in contact with the other wire. The dewatering box (30) includes at least three successive dewatering zones (30a, 30b) in which every second zone (30a) has a vacuum (p) and every second zone (30b) is vacuum-free. The at least one loading blade (40) is placed inside one of the wire loops (20; 10) at a location where it is opposed by a respective vacuum-free zone (30b), which is preceded and followed by a vacuum zone (30a).

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