Double Roving Feed (DRF) Yarn is a special spin twisted yarn, which can be produced directly on the ring-spinning machine. In this process, two rovings are fed in parallel through the drafting system, separated by two specially developed condensers, and are drafted separately. The twist is introduced as for a normal single yarn by means of ring and traveler. The rovings, which are drafted parallel, are combined after passing the front rollers at the exit from the drafting system, with the twist being reproduced in the individual components right up to the nip point. Once past the front roller of the drafting system, the two yarns are combined with the ply twist (previously determined) to give the desired yarn count, producing a two fold yarn with the same direction of twist as for single yarns.
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