Wire loading device in a paper machine

An arrangement in a paper machine, comprising

• wire or wires guided by guide rolls, said wire or wires supporting a web or a fiber layer to be dewatered and having a running direction,
• a wire loading device for applying a mechanical load across an entire width of at least one of said wire or wires such that a pressure pulse is applied to a fiber layer or web, said wire loading device including a frame part and a flexible plate-shaped spring blade, said spring blade having a dragging areas structured and arranged to drag against an inner face of said at least one wire in the running direction of the wire or wires to produce said pressure pulse to the fiber layer or web, said spring blade being attached, from outside its dragging area, to said frame part, said spring blade having a length (L) and a thickness (S), the ratio of the length of said spring blade to the thickness of the flexible plate material of said spring blade being in the range of L/S is from about 10 to about 1000, such that said spring blade follows variations in the thickness of the fiber layer or web, said loading device further comprising loading means for producing said pressure pulse, said loading means structured and arranged to curve said spring blade in a machine direction.

The arrangement of claim wherein said loading means comprises a power unit connected to said frame part, said power unit structured and arranged to rotate said frame part around a horizontal transverse axis of said frame part so as to affect the load on said wire or wires applied by said spring blade.