| 摘要 |
Positioning and withdrawing spinning, twisting or draw pressure rollers. In a number of working devices or in parts of them, the device has a pivoting arm on a pin in the frame. The arm carries freely rotating pressure rollers which are placed against or withdrawn from a driven drive roller carried on the frame. A pin can move back and forth in the arm. A cam lever usually pushes the pin in such a direction that the pressure rollers are positioned on the drive rollers. A rod to which a bolt is attached is pivoted on the lever, and to it is fastened which displaces the arm from the pressure roller as it is withdrawn, when the rod moves in a direction such that the roller is withdrawn.
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