Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1982-09-02
1984-07-03
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Of a slide fastener
29766, 29770, B21D 5350, A41H 3706
Patent
active
044570627
ABSTRACT:
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.
REFERENCES:
patent: 2823388 (1958-02-01), Prupis et al.
patent: 2836239 (1958-05-01), Johns et al.
patent: 3570104 (1971-03-01), Jensen
patent: 4236292 (1980-12-01), Orr et al.
patent: 4333232 (1982-06-01), Orr et al.
Goldberg Howard N.
Nichols Steven E.
Yoshida Kogyo K. K.
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