| 摘要 |
Low friction drafting system for yarn and having in sequence a driven feed roll, a low friction freely rotatable hot roll for preheating the yarn, a low friction freely rotatable hot roll for thermally stabilizing the yarn, a driven output roll, with tension automatically transferring upstream of the preheater roll to preheat the yarn and with the two heated rolls being driven by engagement with the yarn; the thermally stabilizing roll operates at a greater speed than the preheater roll and drafting of the yarn occurs between the two freely rotatable hot rolls.
|
