of such a motion of the slivers a substantial amount of dust and fiber fly is released which particularly at the inlet location of the guide elements 9a where a quieting of the stream is effected is separated and drawn away by the air stream turning to fig2 the lower edge 8 39 of the closed hood assembly 8 is at a small distance a from the cylindrical face 1 39 of a coiler can 1 in this manner the air stream c 39 drawn in from the outside by the flow in the suction duct 7 is reinforced further the lower edge 8 39 of the hood assembly 8 is at a vertical distance b underneath the upper edge 1 34 of the coiler can 1 the lower edge 8 39 may be positioned as high as the level of the upper edge 1 34 in fig5 underneath the intake table 2 two rows of coiler cans 1a 39 1b 39 1c 39 and 1a 34 1b 34 1c 34 are shown the suction duct 7 extends above the intake table 2 which supports the hood element 8a covering one row of the cans and the hood element 8b covering the other adjacent row the hood elements 8a and 8b are secured to the suction duct 7 by hinges and.