Drawing unit or card, to prepare fiber slivers for spinning, gives a controlled roller clamp downstream and roller release upstream to form a thin point or break in the drawn sliver laid in a can

摘要

To sever a fiber bundle (FB') at the exit point of a drawing unit or card, to prepare the material for spinning and be laid in a sliver can (18), the sliver passing through a drawing unit (4) is clamped by the downstream roller pair (7a,7b) for onward movement while an upstream roller pair (6a,6b) releases their clamping action so that a thin point or break is developed in the sliver between the pairs of rollers.