forming wire 3 or still further according to the embodiment of fig8 a by means of a single force source 15 whose point of force application or point of action is located offset behind or downstream of the point of force application at the foil 1 as viewed with respect to the direction of travel a of the forming wire 3 moreover the embodiment of fig8 affords a further advantage when both of the tandemly or successively arranged force sources 15 are supplied with different fluid medium pressures as a result the moment can be intentionally controlled and when necessary there can be produced a different angle between the foil 1 and the forming wire 3 in the embodiment of fig9 there is provided for solving the objectives of the present invention a force source 9 having a rear wall 14 structured such that during operation of the dewatering device dd this rear wall 14 produces a more intensive force in the direction of the forming wire 3 in relation to the force produced by the more forwardly situated region or regions 14a of such force source 9 this rear wall 14 can have as shown a bellows like or pleated structure fig1 depicts a further exemplary embodiment of dewatering device dd wherein one of the force sources 16 is arranged between a leg 5a of the support or support member 5 and a slide 6a of the associated guide or guide member 5 this force source 16 has a force action which is not directed towards the forming wire 3 and the point of application of the force can be shifted in the direction of the forming wire 3 and thus there can be adjusted the moment in contrast thereto in the.