Twin wire former dewatering device for a paper machine

A twin wire former dewatering device for a paper machine, the paper machine including two wires forming closed loops, respectively, arranged facing each other so as to cooperatively form a gap for paper formation, said two wires pinch therebetween paper stock therebetween supplied to the gap for paper formation and convey said paper stock while running, said twin wire former dewatering device comprising:

• a plurality of adjustable dewatering blades arranged inside one closed loop of said closed loops, wherein each of said adjustable dewatering blades is provided with an active plane on the wires;
• and
• an angle adjustment unit which adjusts an angle formed between said active plane and said wires;
• and
• wherein each of said adjustable dewatering blades has a wedge-shape, comprising:
• a supporting surface for supporting said wire while contacting said wire;
• and
• a slanted portion for defining, in associates with a wire surface, a wedge-shaped clearance diverging away from said wire surface toward the upstream of the wire running direction, said slanted portion being formed at the wire entering side of said supporting surface,
• said supporting surface and said slanted portion serving as said active plane;
• and wherein said angle adjustment unit adjusts an angle of said slanted portion;
• and wherein each of said adjustable dewatering blades further comprises:
• a base;
• a second movable member moveably supported by said base so as to move relative to said base in a direction towards and away from the wire portion traveling in the vicinity of said adjustable dewatering blade;
• and
• a first movable member supported by said second movable member so as to swing in a traveling direction of said wire portion to thereby adjust the angle formed between said respective active plane and said wires, and
• wherein said first movable member supports said adjustable dewatering blade;
• and
• wherein said angle adjustment unit is formed between said first movable member and said second movable member;
• and includes a resilient bag member which is a pair of tubes extending in a width direction of said wire over a tip portion of said second movable member;
• and
• wherein said twin wire former further comprises a pressure adjustment unit formed between said base and said second movable member.

A twin wire former dewatering device for a paper machine, the paper machine including two wires forming closed loops, respectively, arranged facing each other so as to cooperatively form a gap for paper formation, said two wires pinch therebetween paper stock therebetween supplied to the gap for paper formation and convey said paper stock while running, the twin wire former dewatering device comprising:

• a plurality of adjustable dewatering blades arranged inside one closed loop of said closed loops, wherein each of said adjustable dewatering blades is provided with an active plane on the wires;
• and
• an angle adjustment unit which adjusts an angle formed between said active plane and said wires;
• and
• wherein each of said adjustable dewatering blades comprises:
• a base;
• a second movable member moveably supported by said base so as to move relative to said base in a direction towards and away from the wire portion traveling in the vicinity of said adjustable dewatering blade;
• and
• a first movable member supported by said second movable member so as to swing in a traveling direction of said wire portion to thereby adjust the angle formed between said respective active plane and said wires, and
• wherein said first movable member supports said adjustable dewatering blade.