GB1098279A - Transfer tail yarn winding machine - Google Patents

Abstract

1,098,279. Winding yarns. E. I. DU PONT DE NEMOURS & CO. May 10, 1966, No. 20717/66. Heading D1J. A yarn winding machine comprises a surface driven tubular package support 43 provided with a stringup groove 46 extending partially through its circumference outside the package area; a self-threading traverse guide 62 through which yarn 36 advances to the support 43 as a package is wound, the groove 46 'being adapted to snag the yarn 36 thereby initiating the package; an auxiliary guide 8 through which the yarn 36 is advanced prior to string- up; means mounting the guide 8 for pivotal movement from a first stringup position to a second position in which advancing yarn is released to the guide 62; a linkage connected to the guide 8 for its pivotal movement between said positions; a releasable latch 22 normally in engagement with the linkage to hold the guide 8 in its first position; and motive means 24 coupled to the linkage for pivotal movement of the guide 8 toward the second position upon release of the latch 22, the linkage being adapted to retard the pivotal movement as a transfer tail of predetermined length is wound between the groove 46 and the package area. In one embodiment. Figs. 1-3, the machine comprises cam-actuated self-threading traverse guides 62, 63 through which yarns 36, 37 normally advance to a driven print roll 64 to package supports 43, 44 on a freely rotatable chuck. Duplicate package supports 47, 48, print roll 49 and traverse guides 50, 51 are provided on the left hand side of a cam assembly 60. Transfer tails are wound on the supports 43, 44 by a tail winder 1 actuated by a portable remote controller 2 and mounted on a bracket 5 by a tapered stub shaft 4 serving as a pivot. auxiliary yarn guides 8, 80 for right- and lefthand tail-winding sequences, respectively, are mounted on the tail winder housing 3. The guide 8, Fig. 3, is pivotable about a fixed pin 12 in a stanchion 7 and has a smooth leading edge 40 interrupted by a yarn guiding recess 13. A connecting rod 14 is slidably journalled between guideways in the stanchion 7 and has a pin 15 at one end to slide in an oblique open slot 16. A pin 17 on the other end of the rod 14 slides in a groove 18 of a bracket 19 rigidly fixed to a bar 20 slidable in stationary guide ways 66. A sear 21 on the bar 20 is engaged by a retractable plunger 22 of a relay 23. A tension spring 24, Fig. 2, is attached to the other end of the bar 20. A miniature radio receiver 26 is mounted in the housing 3 and can switch power from a supply 25 to the relay 23. A controller 2 comprises a miniature radio transmitter 27 having a builtin antenna connected to a power supply 29. Spaced micro-switches 30, 31 are provided with actuator arms 32, 33 having ceramic coated yarn hooks 34, 35. In operation, empty supports 43, 44, 47, 48 are positioned on the chucks, lowered onto the rolls 64, 49 and brought up to winding speed. For right hand operation, the tall winder 1 is swung to the position shown. Using a sucker gun 41 and a string-up tool (not shown), the operator separates the yarns passing through a guide 11 and positions each yarn against a leading edge 40, Fig. 3, and slidably introduces it into the associated recess 13. The yarns are manipulated around the roll 64 but with care being taken to avoid contacting the guides 62, 63 or supports 43, 44. The controller 2 is held above and adjacent the supports 43, 44 and the yarns 36, 37 are introduced into the guides 34, 35. The gun 41 is held to the side so that the yarns 36,37 hold the microswitches 30, 31 open. A thumb switch 38 is depressed and the controller 2 is moved to bring the yarns 36, 37 into contact with the supports 43, 44 and is then moved axially to snag the yarns in the grooves 45, 46. The yarns are broken and thus allow the switches 30, 31 to close. A signal from the transmitter 27 is picked up by the receiver 26 and the plunger 22 is retracted to release the bar 20. The guides 8 are pivotted at a controlled rate to move the yarns 36, 37 towards the package areas on the supports 43, 44 to form transfer tails. Near the end of the stroke of the bar 20, the yarns 36, 37 slip out of the recesses 13 and drop off the guides 8 towards the guides 62, 63. At the end of the tail winding sequence, the operator pushes a lever 69 to manually reset the bar 20. The tail winder 1 is then repositioned to wind transfer tails on the supports 47, 48. In an alternative embodiment, Figs. 4 and 5 (both not shown), the radio transmitter and receiver are omitted. Yarns (36'), (37') are manipulated by a gun (41') and a stringup tool, through guides (8'), around a print roll (64'), and are threaded into narrow stationary slots (76), (77), formed between shaped wires, so that the yarns contact supports (43'), (44') axially outside stringup grooves (45'), (46'). The operator pushes a rod (83) against a compression spring (82) so that a pawl (22') pivots about a pin (81) to unlatch a sear (21') and release a bar (20') which slides under the action of a spring (24'). Movement of the bar (20') towards detent (92) rotates guides (8') in a manner similar to that of Figs. 1-3, so that the yarns are shifted into the grooves (45'), (46') to initiate winding after snapping each yarn free when the guides (8') are partly through their pivotal stroke. During the remainder of the stroke of the guides (8') the transfer tails are formed and the yarns are then released to move towards traverse guides (62'), (63').