An apparatus for manufacturing a slide fastener stringer having a woven coiled fastener element includes a coiling rotor assembly for winding a monofilament orbitally around a mandrel extending substantially warpwise so as to shape the monofilament into a helical coil which, as the fastener element, is interlaced with weft threads as they are woven with warp threads to produce the slide fastener stringer. The rotor assembly comprises a first and a second wheel rotatable respectively on a first and a second floating shaft interconnected by a connecting rod out of coaxial alignment with each other, the first shaft being located adjacent to the warp threads and supporting the mandrel. The wheels have means for guiding the monofilament to turn in an orbital motion during revolution of the wheels. The second shaft supports a core thread bobbin from which a core thread is drawn off through the second shaft, the connecting rod, and the first shaft for extending along the mandrel so as to be inserted through the coiled fastener element.
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