also in the diverging bight between the licker ins 3 a and 3 b a curved cover element 23 is provided which has a free end 23 a the cover element 23 covers one part of the licker in 3 a the cover element 23 is in a manner not illustrated shiftable concentrically to the cylindrical outer face of the licker in 3 a it also can be pivoted towards or away from the licker in 3 a about a point of rotation the edge 22 a of the mote knife 22 and the free end 23 a of the cover element 23 define a waste outlet separating opening which constitutes the inlet of a hood 24 for removing trash dust short fibers and the like separated from the fiber material similarly between the licker ins 3 b and 3 c two bights are formed as shown in fig2 in the converging bight a cover element 26 is arranged such as an extruded profile member which fully occupies and thus closes the bight in the diverging bight a mote knife 27 is disposed whose severing edge 27 a is oriented opposite the rotary direction 3 5 of the licker in 3 c and is spaced at a distance a shown in fig5 from the clothing 3 6 the distance a may be adjusted by a setscrew 30 also in the diverging bight between the licker ins 3 b and 3 c a curved cover element 28 is provided which has a free end 28 a the cover element 28 covers one part of the licker in 3.