opening roller is provided with needles or saw tooth wire for a purpose to be hereinafter described the opening roller 15 is fixedly mounted on a shaft 16 rotatably supported in bearings not shown which are located in a boss portion 17 for rotation about an axis parallel with the rotational axis of the feed roller supporting shaft the shaft 16 extends rearwardly out of the housing 3 and supports thereat a pulley 18 in driving engagement with a drive belt 19 which extends along the machine and serves to impart drive to similar opening rollers at the remaining spinning stations the axes of rotation of the opening rollers lie in a common horizontal plane passing through the lower portion of the housings 3 when said housings are in their first or operable position also provided in the lower housing portion 4 is a trash collection chamber 20 which communicates with the peripheral surface of the opening roller 15 by an aperture 21 at the bottom of the chamber 20 is an outlet 22 from which extends an outlet duct 23 formed in the housing 3 and movable therewith the outlet duct 23 is arranged with the housing in the position shown in fig2 in alignment with the bore of a suction pipe 24 held in a bracket 25 fixed to the machine frame 1 in operation the suction pipe 24 is connected to a source of suction for a purpose hereinafter described in the upper surface of the bracket 25 is an annular groove 26 which forms a seating for a rubber sealing ring 27 a cover plate is fixed by screws.