Patent GB-1144096-A (GB)
Title: Machine for automatically doffing and donning
Inventor: LIVINGSTON RICHARD DEAN
IPC: D01H9/10
Filed: 1967-03-29
Abstract: 1,144,096. Doffing and donning machines. BARBER - COLMAN CO. 29 March, 1967, No. 14237/67. Heading DID. A doffing and donning machine comprises a carriage which continuously moves along the spinning machine and has means to move the ring traveller to one side, to prise the bobbin off the spindle, to eject the bobbin vertically upward free of the spindle, to catch the bobbin and move it laterally away from the spindle, to strip the thread coiled round the spindle without breaking the thread, to locate the thread in a cutter and clamp whilst wrapping it around the lower end of the spindle, to cut the thread extending between the clamp and the doffed bobbin and to don a fresh bobbin so that the clamped thread is located inside the bobbin against the spindle and extends through the ring preparatory to winding. Carriage (Figures 1 and 2). The carriage 35 is located on the spinning frame by rollers 49, 51 and 53 and is driven by a pinnion 39 engaging a rack 40 on the frame. The carriage 35 is vertically adjustable on a wheeled base 37 that conveys a box carrying fresh bobbins. The carriage has two banks of cams which operates the various mechanisms. Doffing (Figures 5, 6, 7, 8, 10 not shown). As the carriage moves a flexible blade (78) (Fig. 5) engages the traveller 21 and moves it past the spindle (11) and a cam (45) lifts the top yarn guide (19) clear of the bobbin (10). A cam operated priser (84) (Fig. 6) then follows a path (116) (Fig. 7) so that springs may firstly prise the bobbin off the spindle and then "shoot" it vertically upwardly. At the top of its flight the bobbin contacts a latch which releases a member (137) (Fig. 8) so that spring loaded arms (126), (129) pivot and grip the bobbin against an arm (121). The arms (121), (126), (129) are then bodily pivoted from the chain dotted position (Fig. 10) to the full line position so that open clamps (151), (152) on a chain conveyor (144) may close. on the bobbin and remove it from the arms when they are opened. Stripping thread from the spindles (Figures 11, 12, not shown). A guide (176) is firstly pivoted so that the yarn extending from the bobbin to the spindle is moved over the top of and behind the spindle. An inclined spring loaded fork (181) is then raised to lift the yarn higher than the spindle and moved laterally to locate the yarn to the other side of the spindle, at the same time stripping the yarn from the spindle. Cutting and clamping (Figures 15, 16, not shown). A guide (224) is pivoted and a hook (242) is raised and lowered to draw the yarn down the spindle and into a cutter clamp into the position shown in Figure 15. The clamp comprises a pivoted guide (215) which clamps the yarn against a member (211) and the cutter is a pivoted blade (214) which cooperates with member (211) to sever the yarn from the bobbin and to leave the other end passing around the spindle, through the traveller and guide (19) to the supply. Donning. (Figures 21, 22, not shown). Bobbins (10) are raised by a chain conveyor from the box on the carriage and deposited on a rack 274 where they slide to the position illustrated in Fig. 21 and abut a flexible stop (279). A guide (288) is then pivoted so the bobbin moves past the guide (279) and a further guide (279a) and is clamped in position (10) (Fig. 22) by a flap (311) against a chute (285). The flap (311) is then released so the bobbin drops until it is pressed by a spring (323) against the chute (285). A hammer (327) with a head (325) then pivots to place the bobbin over the spindle 11 so that it abuts a spindle shoulder (24) and is pressed against the spindle top by a spring (332). A further hammer (337) (Figure 15) is then pivoted to press the bobbin over the shoulder (24) to clamp the yarn against the spindle preparatory to winding.