| 摘要 |
Method of and apparatus for making yarn with a core, wherein the free fibers are tightly attached to the core and are wound around it. The core of fibrous material is fed by a pair of feeding rollers, the core being fed through a first jet for the formation of wrapping of fibers. In the first jet, fibers are laterally driven in by an air stream. Simultaneously with the laterally led in fibers in the first jet for the formation of wrapping, there is driven in an additional core thread, which moves with the linear velocity of the core. Such additional core thread is made of fibrous material of staple fibers or is made of filament material. The laterally led in fibers and the additional core thread have a mutual trajectory of movement and are driven in the jet for the formation of wrapping by the suction of the tangentially fed same jet air stream. The composite thread formed from the core of the said fibrous material, the additional core thread, and the laterally fed fibers are false twisted by a tangentially led in air stream in a subsequent, second false twisting jet. The pressure of the air stream for the false twisting of the core from fibrous material, with the additional core thread and the laterally fed fibers, is at least equal to the pressure of the tangential air stream for leading in the fibers in the jet for the formation of wrapping.
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