Patent GB-823641-A (GB)
Title: A portable yarn bonding device
Inventor: CHANG NAI CHONG
IPC: B65H69/02
Filed: 1957-08-30
Abstract: 823,641. Piecing-up yarns. CARTER Inc., A. B. Aug. 30, 1957, No. 27405/57. Class 120(3) A yarn bonding device comprises two relatively movable pads for holding two yarns the ends of which are to be joined, yarn transfer arms for laying a length of each yarn between the pads and in overlapping relationship, mechanism for moving the pads into pressing engagement with the yarns and means co-operating with the pads for applying adhesive over, and thereby uniting, the yarns In use, the device shown is held in the operator's hand by means of a handle 47 and strap 49 and the two yarns, A and B, are passed through a slot 26 in a cover 25 and placed in guide notches 52, 54, and 53, 55, the parallel relation of the yarns being ensured by prong. dividers 50 and 51 and a wishbone 60 denecting the yarns to introduce them separately into gaps between open shearing cutters comprising stationary and movable blades 105, 106 and 107, 108. The spring- loaded thumb lever 35 is depressed causing rotation of the gears 36, 37, 38, 39 and the shafts 30 and 31, thereby swinging the transfer arms 32 and 33 from the position shown in Fig. 19, to the position of Fig. 20, during which movements the arms engage and cross the yarns so that laterally bent straight runs thereof are introduced between spring fingers as at 119a and 119b, the yarns are then wrapped around the blades 106, 105 and extend through the cavity between opened spring-urged pad assemblies 80 and 81 where they are positioned in overlapping engagement, and the blades close to sever the yarn tails. Further movement of the arms 32, 33, pulls the cut tails through the fingers until the severed yarn ends are within the pad cavity and have an amount of overlap depending on the adjustable travel of the lever 35. The assemblies 80, 81, close upon the yarn ends and unite them with adhesive supplied from a reservoir 82 by a sponge rubber element 84. When a spring effects reverse movement of the lever 35, the arms 32, 33 return to the starting position, the assemblies 80, 81, open as the joint is withdrawn and then close as the lever 35 approaches its starting position after the joint had been transferred forward while still clamped between the fingers. At the end of the return stroke, the joint is free and the united yarn may be removed manually. The pad assemblies, including the adhesive reservoir, are expendable and replaceable. Operation of the pad and cutter assembly mechanism. When the gear 38 commences rotation, a cam segment 140 engages a follower 141 to lift a side plate 91 thus tilting a frame 90 thereby swinging cam elements 125, 126 which contact stub pin projections 75 and 76 so that pad support plates 70 and 71 are spread and pin projections 132 and 133 are lifted on to cam surfaces 130 and 131 to hold the assemblies 80, 81, from their normally closed position until the yarns are correctly positioned therebetween. Then the surfaces 130, 131, abruptly release the plates 70, 71, and the pad assemblies close to effect the joint. The tilting motion of the frame 90 causes prongs 116 and 117, in contact with a cross-bar 113, to swing the blades 105, 106 and J-levers 101, 102 so that the blades 107, 108, restrained by but rocking slightly in slots 109, 110 in stationary brackets 111, 112, pivot on and coact with the blades 105, 106 to sever the yarn tails.