Manufacture of slide fasteners

Details Manufacture of slide fasteners Manufacture of slide fasteners

1989-07-28

1990-06-12

Echols, P. W.

Metal working

Method of mechanical manufacture

Of a slide fastener

29 332, 29408, 29766, 29707, 29712, 29714, B29D 500

Patent

active

049321137

ABSTRACT:
A slide fastener is made from a workpiece formed of a pair of longitudinally extending parallel tapes having confronting edges provided with longitudinally extending and transversely couplable coupling elements. This workpiece is passed along a treatment path through a gapping station, a bottom-stop installing station, a slider-mounting station, a top-stop installing station, and a cutting station. The elements are removed from the tapes at gaps spaced longitudinally of the workpiece in the gapping station and a bottom stop is fitted to the elements at one end of each of the gaps in the bottom-stop installing station. A slider is mounted on the elements at the slider-mounting station between each gap and the following gap and a top stop is fitted to the elements in the top-stop installing station at each gap. Finally the tapes of the workpiece are transversely cut at the gaps at the cutting station into individual slide fasteners. The workpiece is marked upstream of the gapping station at locations spaced apart by predetermined distances and the work piece is stored in buffers downstream of each of the stations except the cutting station and only fed from each buffer into the immediately downstream station when a predetermined length of the workpiece is in the buffer. The marks on the workpiece are detected at each of the stations and the respective steps are triggered only when a one of the marks is detected.

REFERENCES:
patent: 2885774 (1959-05-01), Waldes
patent: 3118219 (1964-01-01), Perrella
patent: 3570104 (1971-03-01), Jensen
patent: 4625375 (1986-12-01), Osaki

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