| 摘要 |
1485765 Threading up yarn forming apparatus BOBTEX CORP Ltd 15 Oct 1974 [23 Oct 1973] 49376/73 Headings DID and D1F To thread extruded filament of inter-fibre binding material between the rollers carrying fibres, the filament is attached to a roller on the opposite side of the rollers to the extruder, and the filament while winding on and riding on the rotating roller to a larger circumferential portion is threaded between the rollers to then form a composite yarn with the fibres. Rollers 10 and 18, Fig. 1, carry fibres to nip 24 to contact at least one filament 22, e.g. a preferably tacky polymer, extruded from die 20 to form yarn 26. During threading, the filament is attached to driven frusto-conical roller 54 and rides, Fig. 3, up the roller to lie between rollers 10, 18, and is then automatically cut. The filament end may be secured in gap 66 adjacent preferably flexible plate 64. Roller 18 preferably has an evacuated chamber holding fibres in trough 34. The fibres are formed by toothed or needled rollers 14, 16, and fed by rollers 10 12. Yarn 26 is false twisted, e.g. friction twisted, at 28, and stretched. An air jet may be provided at the extruder to deflect running filament into a waste receiver. An air gun may be used to thread filament through the apparatus. Yarn or like material may be initially fed to nip 24 to assist formation of yarn 26 when filament 22 is between the rollers. The yarn or like material is then automatically cut by means 80 (Fig. 4, not shown). |
