Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Reexamination Certificate
2008-04-29
2008-04-29
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
C162S211000, C162S300000, C162S301000, C162S351000, C162S352000
Reexamination Certificate
active
07364643
ABSTRACT:
Fibrous stock is supplied by a paper or board machine headbox (1) between looped forming wires (11, 12). Water is removed in a first dewatering zone (Z1) formed with a fixed forming shoe (3) having a curved surface against which a wire (12) is supported while the opposite wire (11) is unsupported in the area of the shoe (3). Water is removed in a second dewatering zone (Z2) formed by fixed dewatering blades (21) on the other side of the wires (11, 12) and supported against the stock therebetween (21) and on the opposite side of the wires (11, 12) by dewatering blades (24), loaded in a controlled manner against the fixed dewatering blades (21) at gaps (22) between these so that pulsating dewatering is caused in the second zone (Z2). The wires (11, 12) are guided so the shoe (3) causes essentially non-pulsating dewatering in the stock.
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International Preliminary Examination Report Issued in PCT/FI03/00481, Nov. 17, 2004.
Search Report issued in PCT/FI03/00481, Oct. 17, 2003.
Anttilainen Sami
Irwin Jeffrey C.
Korhonen Hannu
Odell Michael
Poikolainen Antti
Hug Eric
Metso Paper Inc.
Stiennon & Stiennon
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