| 摘要 |
<p>The apparatus (1) has rollers (25, 27), and a shaft (5) supporting the rollers. The shaft is accommodated in shaft bearings (7, 11) by respective bearing sections. One of the bearing sections of the shaft is displaced to one of the shaft bearings in such a manner that the other bearing section is released by the other shaft bearing. A spring exerts force on the shaft to hold the latter bearing section in the latter shaft bearing. Toothed belt gearboxes (21, 23) are attached to the former shaft bearing.</p> |
