| 摘要 |
A fastener chain being fed along a predetermined path is brought to a temporary standstill each time an actuating pawl, engaged by one of the successive spaced pairs of interengaged scoop groups of the fastener chain, is displaced a predetermined distance therewith to actuate a limit switch. A separator mechanism responds to the actuation of the limit switch to spread one of the successive pairs of opposed blank tape spaces of the fastener chain to an extent necessary to partly disengage the preceding or succeeding pair of scoop groups. The fastener chain is then moved along the path, either rearwardly or forwardly, to such an extent that the disengaged endmost scoops of the partly disengaged pair of scoop groups come into abutment against a stop disposed adjacent to a die. A punch mechanism coacts with the die to apply a pair of top stops to the endmost scoops. The above cycle of operation is repeated to attach top stops to the trailing or leading ends of the successive pairs of scoop groups. |
