| 摘要 |
The apparatus contains a ribbon wheel driven in alternating direction of rotation with a flexible insertion ribbon being wound and unwound in a first looping region of the ribbon wheel and lappable over more than 360 DEG of the circumference. A ribbon type guide element loops the portion of the insertion ribbon present on the ribbon wheel. The insertion ribbon and the guide element are each fastened at one end in a trough-like depression of the ribbon wheel by a recessed clamp which has a support surface adapted to the adjacent surface portions to be lapped and ascending in a circumferential direction in a continuous arc. The other end of the guide element is fastened by a second clamp disposed in the same or another depression.
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