Apparatus on a textile machine for cleaning fibre material, for example of cotton, having a high-speed first or main roller

An apparatus on a flat card, roller card or the like for cleaning fibre material, comprising a high-speed first or main roller, which is adapted to support or convey a travelling fibre web, associated second and third rollers, which have respective nips with one another and with the first roller on rotation of the three rollers, and drive means for rotation of the rollers, which drive means are so arranged that the second roller is rotated in a direction of rotation that is the same as that of the first roller and opposite to that of the third roller, wherein the second roller is arranged downstream of the third roller and co-operates with the first roller so that a fibre mat is opened and detached, the fibre mat is transferred to the nip with the third roller and is conveyed by the third roller to the nip with the first roller, where it is transferred back to the first roller, the first or main roller being associated with fixing carding elements, wherein upstream of a pair consisting of a second roller and a third roller—seen in the direction of rotation of the first or main roller—there is arranged at least one fixed carding element in which the teeth of the clothing are inclined opposite to the direction of rotation of the first or main roller.

An apparatus on a flat card, roller card or the like for cleaning fibre material, for example cotton, comprising a high-speed cylinder which is adapted to support or convey a travelling fibre web, associated second and third rollers, which have respective nips with one another and with the cylinder on rotation of the rollers, and drive means for rotation of the rollers, wherein the second roller is arranged downstream of the third roller and so co-operates with the cylinder that a fibre mat is opened and detached, the fibre mat is transferred to the nip with the third roller and is conveyed by the third roller to the nip with the cylinder, where it is transferred back to the cylinder, the rollers having a clothing with needles or teeth which are inclined at an acute angle (front angle) in the direction of rotation, and in the region of the transition of the fibres from the cylinder to the second roller the needles or teeth of the rollers in question being inclined in different directions and the speed of the second roller being low in comparison with the speed of the cylinder, in which the second roller is a worker roller and is rotated in a direction of rotation which is opposite to that of the cylinder and the same as that of the third roller.