In a fiber body manufacturing apparatus, after a mixture is transported from a second mesh belt, a first humidifying section performs a cleaning operation of softening dust generated from the mixture and adhering to a suction pipe by applying a solvent, removing the softened dust, and then drying the solvent adhering to the suction pipe by performing suction by the suction pipe.

A dewatering bar on a papermaking machine includes a main body with a longitudinal direction aligned transversely to the direction of movement of a screen belt. The main body has at least one chamber closed in a pressure tight manner, which extends in the longitudinal direction of the dewatering bar. The chamber has a connection to a pressure line, a wall having a surface facing the screen belt of the papermaking machine, and side walls connected to the wall. The position of the wall of the chamber is variable, and a device for detecting the change in position of the wall due to changes in the pressure is disposed in the chamber. A wire section of a papermaking machine is also provided.

A dewatering bar on a papermaking machine includes a main body with a longitudinal direction aligned transversely to the direction of movement of a screen belt. The main body has at least one chamber closed in a pressure tight manner, which extends in the longitudinal direction of the dewatering bar. The chamber has a connection to a pressure line, a wall having a surface facing the screen belt of the papermaking machine, and side walls connected to the wall. The position of the wall of the chamber is variable, and a device for detecting the change in position of the wall due to changes in the pressure is disposed in the chamber. A wire section of a papermaking machine is also provided.