| 摘要 |
<p>A spool (1) comprises a sleeve (4, 4 min ), flanged members (2,3) and a resilient dish-shaped member (6) positioned between a thread-winding retaining flange (5, 5 min ) and one of the flanged end members (2). Member (6) is in the form of a conical spoked wheel. Flange (5,5 min ) has peripheral teeth (20) for guiding thread onto and a chamfered rim (25) which cooperates with a chamfered rim on member (6). The thread cascades from one rim (25) onto the other (27) and is thereby positively guided between member (6) and flange (5). Member (6) applies a positive but gentle clamping pressure to thread trapped at any point about its periphery. Sleeve (4) is made of identical halves which are welded together within an outer sleeve of variable diameter. The construction and interchangeability of the components facilitates production of different high quality spools, e.g. to accomodate different lenghts of threads.</p> |
