| 摘要 |
A method of and apparatus for detecting ends of successive fly strips connected end to end by a slide fastener chain. The successive fly strips, with their first flaps overlapping a tape of one fastener stringer and with their second flaps overlapping the other fastener stringer, are fed lengthwise along a straight path. Then, the second flaps are folded over the respective first flaps as the fly strips pass through a folder extending through a fixed point on the straight path. During this folding, a trailing end of the preceding second flap is temporarily deflected so as to provide a relatively large triangular space between confronting ends of an adjacent pair of the second flaps when the same confronting ends arrive at the fixed point. Finally, a detector senses the presence of the triangular space, which indicates the arrival of confronting ends of an adjacent pair of the fly strips. |
