| 摘要 |
A drafting mechanism for at least one textile fibre sliver, comprises upper rolls 27 which are loaded onto and arranged into pairs with, lower rolls III, arranged one after another. The upper roll has a resilient roll covering (27.5 , figure 5) which is mounted circumferentially on a basic roll body and which has a nipping region 53 where a fibre sliver or a plurality of fibre slivers are arranged to be nipped between rolls 27 and III. The upper and lower rolls are mounted asymmetrically relative to one another. A roll shaft of the upper or lower roll may be reversibly mounted so that when the covering 27 becomes worn, a roll may be turned so that a different, unworn, portion of the cover 27 defines the nip region. In this way an extended period between upper roll refurbish polishing cycles may be achieved. |
