Apparatus for manufacturing coiled coupling elements for slide f

Details Apparatus for manufacturing coiled coupling elements for slide f Apparatus for manufacturing coiled coupling elements for slide f

1980-11-25

1982-04-20

Combs, Ervin M.

Metal working

Means to assemble or disassemble

Slide fastener

425391, B29D 500

Patent

active

043251846

ABSTRACT:
Improvements in apparatus of the type including a mandrel around which a continuous filament is coiled and which has a guide channel formed longitudinally therein for slidably receiving a continuous core to be positioned within the coil, and a mandrel holder holding the mandrel adjacent one end thereof and reciprocating with the latter in the longitudinal direction thereof in step with the formation of each convolution of the coil. A unit length of the core required for each coil convolution is forcibly pulled away from a core pay-off bobbin by a pair of pull-out rolls actuated intermittently by a ratchet mechanism. The mandrel holder has formed therein passageways through which the core travels from the pull-out roll pair to the entrance end of the guide channel in the mandrel. The passageways are adapted to provide several obtuse-angled bends for holding the core in frictional contact with the mandrel holder, so that the successive unit core lengths are delivered without tension to the guide channel in the mandrel with the reciprocation of the mandrel holder.

REFERENCES:
patent: 3137037 (1964-06-01), Wilcken
patent: 3152433 (1964-10-01), Burbank
patent: 3262157 (1966-07-01), Fujisaki
patent: 3353217 (1967-11-01), Bashover
patent: 3680604 (1972-08-01), Frohlich et al.

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