An Overview on the Spinning Triangle Based Modifications of Ring Frame to Reduce the Staple Yarn Hairiness <s> 2) EliTe®CompactSet <s> Compact spinning is a novel concept generated through re-engineering of established ring spinning process by attaching a pneumatic zone to existing ring spinning machine. Compact spinning achieves a remarkable improvement in yarn quality and yarn structure through better utilization of fibre properties. The advantageous yarn characteristics provide better opportunities for cost savings in subsequent processing stages. Another interesting aspect is the possibility of developing new textile products using compact spinning. There are three major manufacturers in the field of compact spinning machines namely, Sussen (Elite spinning), Rieter (Comfor spin), and Zinser (Air-Com- Tex 700). First launch of Elite spinning machine in India faced a setback due to few practical problems like inadequate lubricating film on ring (does not allow the maximum spindle speed to be achieved), higher maintenance cost, higher labour cost and apron clogging due to accumulation of fly. However, with further developments compact spinning will certainly be the future of ring spinning, on account of its higher productivity and yarn quality.© 2003 ASME <s> BIB001 </s> An Overview on the Spinning Triangle Based Modifications of Ring Frame to Reduce the Staple Yarn Hairiness <s> 2) EliTe®CompactSet <s> The compact spinning systems are mostly used for spinning of combed yarns. However, many attempts have been made to use the compact system for spinning carded yarns. Recently SUESSEN has introduced D–Type slot compact system for producing carded compact yarn. In this research work, an attempt has been made to analyze the migration properties of D–Type slot carded compact yarn. Three different twist factors have been selected and compared with regular carded compact yarn and regular carded ring yarn. In this work, the migration parameters such as Mean Fiber Position, Root Mean Squared (RMS) Deviation, Migration Intensity and Yarn Diameter have been measured using the Charge-Coupled Device (CCD) camera attached on a projection microscope. D–Type slot carded compact yarn, regular compact and regular ring yarn structures have been critically analyzed using Scanning Electron Microscope. The test results clearly indicate that the fiber migration in D–Type slot compact yarn is far better than both regular compac... <s> BIB002
The system consists of a tubular profile subjected to negative pressure and closely embraced by a lattice apron (shown in Figure 5 ). The delivery top roller, fitted with rubber cots, presses the lattice apron against the hollow profile and drives the apron, at the same time forming the delivery nipping line. The tubular profile has a small slot in the direction of the fiber flow, which commences at the immediate vicinity of the front roller nipping line and ends in the region of the delivery nipping line. This creates an air current through the lattice apron via the slot towards the inside of the profile tube. The compacting of the fiber strand will start at the edge of this slot. The fibers follow the outer edge of this suction slot and at the same time they perform a lateral rolling motion. By the law of vectorial addition of speed, the speed of the portion of fibres along the edge (shown in Figure 6 ) will increase. This increase in speed of the portion of fibre moving along the downstream edge causes the fibres to be gently stretched. Fiber will be unable to cross the edge of the slot and will align itself closely to fibre. Thus a fibre bundle is transformed into a bundle where the fibres are perfectly Journal of Textile Science and Technology parallel and close to each other  . The bigger diameter of the delivery top roller compared to the diameter of the front top roller creates a tension in longitudinal direction during the condensing process. The consequence of this tension causes the curved fibres to straighten BIB001 . The suction slot can be arranged at an angle to the direction of fiber flow, especially when processing short fibers. This ensures that the fiber ends are well bound into the strand during transportation in condensing zone. It also creates a transverse force on the band of fibers so that the fiber ends are closely embedded into the fiber assembly  . Recently SUESSEN has introduced D-Type slot compact system for producing carded compact yarn BIB002 .