GB1057101A - Apparatus for automatically piecing slivers during sliver can exchange - Google Patents

Abstract

1,057,101. Spinning yarns; coiling slivers; roller arrangements; stop-motions. NITTO BOSEKI CO. Ltd. Nov. 13, 1963 [Nov. 17, 1962 (4)], No. 44854/63. Headings DID and D1F. Trailing and leading ends of preceding and succeeding slivers are automatically pieced during can exchange at a coiling station. In the apparatus shown in Fig. 1, a drawing frame 3 receives sliver from carding machines 1, 1', by belt conveyer 2 and delivers predetermined lengths of drafted sliver into cans, as at 5, which are automatically replaced by empty cans from a line A thereof. Filled cans are fed into a line C and cans from a line B supply sliver to a drawing frame 4. the lines of cans being automatically shifted laterally by pneumatic apparatus according to the progress and needs of sliver transfer. The required sliver piecing is effected on a table 70. When the frame 4 is operating, lifting rollers 52, 54, rotate on rollers 51, 53, Fig. 3, interconnected through an electromagnetic, double clutch (61) and gears (55,56,57), Figs. 6 and 7 (not shown) which withdrawn sliver from the line B through guides and rollers (83) 71, 72, 74, (77) to the frame: a sliver end suction guide apparatus is meanwhile held in the position shown in chain lines in Fig. 3. After a predetermined and measured length of sliver has been delivered, an electric signal actuates can change and, after a measured number of such changes, another electrical signal stops the frame 4. When a full quota of filled cans are assembled in line C, the situation is sensed electrically and the piecing operation is automatically started by a motor-driven programmer (not shown) which transmits control signals through cam-operated contacts. A reversing motor 58 is started and its drive transferred by clutch (61) to rollers 51, 52, which thus rotate slowly in reverse direction and (since the rollers 53, 54 are held from rotation) the sliver is stretched and then severed, the severed ends falling back into cans in line B: clutch (61) is again operated to restore the forward drive connection to rollers 51, 52, and rollers 54 and 52 are pivoted pneumatically away from rollers 53 and 51. The suction guide apparatus moves into position (shown in full lines in Fig. 3) opposite filled cans whereat each sliver end 46 is sucked into an opening 48 wherein entry is limited by a (sliver) intercepting member (44) Fig. 5 (not shown) before which the sliver accummulates. The apparatus then moves upwardly and swings laterally to transfer sliver to a position where it is nipped between rollers 51, 52; the accummulation in opening 48 is retained e.g. by needles, projections, sharp edges, notches, so that, as the swinging movement continues, the sliver is stretched and severed; the members (44) are opened so that the (waste) acumulation is sucked into a main discharge duct. The succeeding sliver end is thus aligned with the trailing end of preceding sliver (62) so that, when roller 54 is moved towards roller 53 (by an air cylinder), the ends are brought into overlapping contact and piecing is completed.