| 摘要 |
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 (Z 1 ) 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 (Z 2 ) 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 (Z 2 ). The wires ( 11, 12 ) are guided so the shoe ( 3 ) causes essentially non-pulsating dewatering in the stock.
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