| 摘要 |
A spool drive (70) for selectively retaining a spool (S) having end flanges (96) with radial ribs (97) and a central contact area (98) about a bore (99) while filamentary material (F) on the spool is payed out under tension having, a spindle (25) adapted to receive the bore in the spool, a magnetic chuck (82) surrounding and rotatable with the spindle, and a positive flange engagement mechanism (85) associated with the magnetic chuck biased into contact with an end flange of the spool and adapted to engage the radial ribs to restrain rotational slippage between the magnetic chuck and the spool.
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