Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1981-08-31
1983-07-12
Combs, Ervin M.
Metal working
Method of mechanical manufacture
Of a slide fastener
29766, B21D 5350, B29D 500
Patent
active
043922910
ABSTRACT:
Disclosed herein is method for assembling a pair of slide fastener stringers each having spaced sections in continuous rows of scoops and an apparatus for the same. The leading edge of the scoop row in the leading stringer is detected by a probe inserted into the guide groove of the binder member for the scoop row. The engagement of the leading edge and the claw of the probe retards the progress of the leading stringer thereby retarding the rotation of the feed roller for the leading stringer while increasing the speed of the rotation of the other feed roller for the trailing stringer, which is connected to the first feed roller through a differential transmission mechanism. After both of the stringers are brought into right alignment for exact engagement in the binder member, the claws disengage from the leading edges of the scoop row in the stringers and come out of the spaced sections. In this condition, the spaced sections in the stringers are detected individually by detecting lever means. Detector means detect the movement of the detecting levers and judge whether the proper interengagement of the stringers is obtained or not so that it produces either a signal to protrude the claw into the same spaced section following insertion of the detecting lever or a signal to stop operating the feed rollers.
REFERENCES:
patent: 3947946 (1976-04-01), Omori et al.
patent: 4237604 (1980-12-01), Sawada et al.
patent: 4238880 (1980-12-01), Takahashi
patent: 4292733 (1981-10-01), Iimura
Combs Ervin M.
Nichols Steven E.
Yoshida Kogyo K. K.
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