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In the manufacture of a slide fastener stringer, the relative count of fastening elements per unit length of the tape of the stringer being manufactured is continuously monitored and used as a feedback control to adjust the relative rate of advancement of either a train of fastening elements or a st

In the manufacture of a slide fastener stringer, the relative count of fastening elements per unit length of the tape of the stringer being manufactured is continuously monitored and used as a feedback control to adjust the relative rate of advancement of either a train of fastening elements or a stringer-tape-forming member.

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A method of manufacturing a continuous stringer for a slide fastener comprising advancing a continuous train of fastening elements to an assembly station, advancing a continuous stringer-tape-forming member to the assembly station, assembling the train of fastening elements and the stringer-tape-for

A method of manufacturing a continuous stringer for a slide fastener comprising advancing a continuous train of fastening elements to an assembly station, advancing a continuous stringer-tape-forming member to the assembly station, assembling the train of fastening elements and the stringer-tape-forming member at the assembly station to form a continuous stringer having a carrier tape with the fastening elements secured to one edge of the tape, advancing the continuous stringer from the assembly station, sensing the relative quantity of fastening elements per unit length of the tape in the stringer after the assembly station, and controlling the relative rate of advancement of one of the continuous train of fastening elements and the continuous stringer-tape-forming member to the assembly station in response to the sensing to produce a continuous stringer having a substantially predetermined quantity of fastening elements per unit length of the tape. An apparatus for manufacturing a continuous stringer for a slide fastener comprising means for assembling a continuous train of fastening elements and a continuous stringer-tape-forming member into a continuous stringer having a carrier tape with the fastening elements secured to one edge of the tape, first means for advancing the continuous train of fastening elements to the assembly means, second means for advancing the continuous stringer-tape-forming member to the assembly means, means for sensing the relative quantity of fastening elements per unit length of the carrier tape in the stringer, and means responsive to the sensing means for controlling one of the first and second advancing means to produce a substantially predetermined quantity of fastening elements per unit length of the carrier tape.