| 摘要 |
A suction insert assembly is disclosed for a suction roller of an open spinning unit having a pair of rotatably driven friction rollers defining a yarn forming wedge-shaped gap or slot therebetween. To accommodate ease of manufacture and provide variable adjustment of the suction effect at the wedge slot, the suction insert assembly for at least one of the friction rollers includes a pipe fitted to the machine frame, and an intermediate piece filling out the space between the pipe and the perforated friction roller shell. The pipe is connected to a vacuum line and has a pipe slot communicating with an intermediate slot of the intermediate piece. The pipe rotatably supports the perforated shell by roller bearings located near the pipe ends.
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