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An apparatus is disclosed for driving a pair of friction rollers arranged adjacent one another forming a wedge-shaped yarn-forming gap. A common drive belt is run along the surfaces of both rollers and the shaft of an electric motor. The motor is displaceably mounted in a guide which maintains the m

An apparatus is disclosed for driving a pair of friction rollers arranged adjacent one another forming a wedge-shaped yarn-forming gap. A common drive belt is run along the surfaces of both rollers and the shaft of an electric motor. The motor is displaceably mounted in a guide which maintains the motor shaft in an essentially parallel relation to the friction roller shafts. The motor shaft can thereby be displaced for the purpose of increasing or decreasing the tension of the drive belt.

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An open-end friction spinning apparatus comprising: at least one spinning unit, said spinning unit comprising two friction rollers having cylindrical surfaces arranged adjacent one another forming a wedge-shaped yarn-forming gap therebetween, pulley means arranged on power-driven shaft means, said s

An open-end friction spinning apparatus comprising: at least one spinning unit, said spinning unit comprising two friction rollers having cylindrical surfaces arranged adjacent one another forming a wedge-shaped yarn-forming gap therebetween, pulley means arranged on power-driven shaft means, said shaft means extending substantially parallel to said roller means, and joint driving belt means engaging said pulley means and said surfaces of said two friction rollers, said power-driven shaft means comprising a shaft mounted on an electric motor, said rollers and said power-driven shaft means being spatially arranged at the vertices of a triangle, said shaft means having an axis of rotation and said wedge-shaped gap being bisected by a bisecting plane substantially tangent to both said friction rollers, said axis of rotation being contained in a plane other than said bisecting plane, said power-driven shaft means being more closely disposed to a first roller of said two friction rollers receiving a belt directly from said pulley mounted on said shaft means than to a second roller receiving said belt directly from said first roller.