Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1985-05-23
1985-12-31
Weidenfeld, Gil
Metal working
Method of mechanical manufacture
Of a slide fastener
29 332, 29767, B21D 5356
Patent
active
045611610
ABSTRACT:
A longitudinally gapped, continuous slide fastener chain with sliders slidably mounted thereon is longitudinally fed by a feed roller through an apparatus including a top stop applicator mechanism. When the slider on a pair of coupling element rows is sensed by a slider sensor, the feed roller is stopped and a chain stop lever is lowered into a gap adjacent to the coupling element rows. The feed roller is rotated again to feed the slide fastener chain again to displace the chain stop lever slightly downstream by engagement with a bottom stop attached to a following length of coupling element rows. When the slide fastener chain is stopped again, a chain deflector is lowered transversely into the path of the slide fastener chain to depress the chain so that the chain located downstream of the chain deflector is pulled back until the ends of the coupling element rows where top stops are to be applied are bought into clinching dies. After the chain deflector has been fully lowered, a main shaft is rotated through one revolution for actuating a top stop cutter to cut a pair of top stop blanks out of a flat wire bar and for lowering a curling punch to clinch top stops around the rows of coupling elements at their ends in the clinching dies. The foregoing cycle of top stop attaching operation is repeated for successively attaching top stops to the slide fastener chain.
REFERENCES:
patent: 3504418 (1970-04-01), Perlman
patent: 3541662 (1970-11-01), Perlman
patent: 3863321 (1975-02-01), Perlman
patent: 4203207 (1980-05-01), Oyama
patent: 4217685 (1980-08-01), Seki
patent: 4368570 (1983-01-01), Morita
patent: 4381593 (1983-05-01), Yoshieda et al.
Webb Glenn L.
Weidenfeld Gil
Yoshida Kogyo K.K.
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