| 摘要 |
PROBLEM TO BE SOLVED: To enable a fiber bundle to be uniformly wound around a core fiber so as not to cause a uneven quality of the core yarn when producing the core yarn Y by feeding the drafted fiber bundle F1 and the core fiber F2 to a nozzle block 1 and a hollow guide shaft body 2, and carrying out the twisting spinning. SOLUTION: The core fiber F2 is fed from the upstream side of a front roller Rf in a drafting device D.
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