belonging to the conveyor belt 40 have been given the reference symbol 34 teeth 42 are arranged on the conveyor belt 40 and also make it possible to transport the fibrous material in a vertical direction and counter to gravitational force the supply line 4 the vacuum line 6 and the pressure line 8 issue into the housing 1 the inflow and outflow through these lines are controlled with the aid of the valves 5 7 and 9 in the way already described above fig3 2 shows a further exemplary embodiment of an apparatus according to the invention with a drain trap and a conveyor belt here a tubular chain conveyor fig4 illustrates a further exemplary embodiment of an apparatus according to the invention for wetting fibrous material which is suitable especially for wetting individual or several waste paper or pulp bales paper in sheets and split paper rolls this apparatus can be produced by converting a conventional pulper is also suitable for retrofitting such pulpers the pulper and also the cowl mounted on top must be adapted to or designed for the pressure conditions prevailing in the invention the fibrous material is administered into the housing 1 by means of a conveying device 42 through the open orifice 21 a slide 48 is subsequently moved down and the orifice 21 is thereby closed the regulating valve 5 of the supply line 4 is opened and wetting liquid in particular water is added to the desired level when the level is reached the.