Method of and apparatus for manufacturing a continuous slide fastener stringer chain with element-free space portions
AssigneeYoshida Kogyo K.K.
InventorKihei Takahashi
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Abstract
A method of and apparatus for manufacturing a continuous slide fastener stringer chain including space portions devoid of coupling elements at longitudinal intervals. A pair of continuous stringer tapes is continuously fed, in synchronism with sewing machine, to a sewing area of the sewing machine, while a pair of interengaged rows of coupling elements is intermittently fed, in synchronism with the sewing machine, to the sewing area. A length of coupling elements is cut off from the pair of interengaged rows of continuous coupling elements each time the latter stops moving.
Claims13
A method of manufacturing a continuous slide fastener stringer chain including space portions devoid of coupling elements at longitudinal intervals, the method comprising the steps of:
- (a) introducing a pair of continuous slide fastener stringer tapes and a pair of interengaged rows of continuous coupling elements into a sewing area of a sewing machine such that said pair of interengaged rows of continuous coupling elements is held on inner longitudinal edges of said pair of stringer tapes, respectively;
- (b) continuously driving said sewing machine to sew said pair of interengaged rows of continuous coupling elements to said pair of continuous slide fastener stringer tapes along said inner longitudinal edges, respectively;
- (c) continuously feeding said slide fastener stringer tapes, in synchronism with said sewing machine, to said sewing area along a first longitudinal path;
- (d) intermittently feeding said pair of interengaged coupling elements, in synchronism with said sewing machine, to said sewing area along a second longitudinal path;
- and
- (e) cutting off a length of coupling elements then being sewn from said pair of interengaged rows of continuous coupling elements each time the latter stops moving.
An apparatus for manufacturing a continuous slide fastener stringer chain including space portions devoid of coupling elements at longitudinal intervals, the apparatus comprising:
- (a) a sewing machine continuously drivable to sew a pair of interengaged rows of continuous coupling elements to a pair of continuous slide fastener stringer tapes along inner longitudinal edges, respectively;
- (b) means for continuously feeding said pair of continuous slide fastener stringer tapes, in synchronism with said sewing machine, to a sewing area of said sewing machine along a first longitudinal path;
- and
- (c) means for intermittently feeding said pair of interengaged rows of continuous coupling elements, in synchronism with said sewing machine, to said sewing area along a second longitudinal path, and for cutting off a length of coupling elements then being sewn from said pair of interengaged rows of continuous coupling elements each time the latter stops moving.
Dependencies are inferred from the claim text.