Yoshida Kogyo K.k.

Mitsuo Sawada

Koichi Kawakami

Toyoo Morita

A pair of separable slide fastener stringers is fed along in one plane along parallel spaced paths, respectively, toward throats of a Y-shaped guide channel in a slider fixed in position. Pins of the stringers are inserted into the guide channel through the throats, respectively. The pins as they emerge from a rear end of the slider are stopped when rows of coupling elements start intermeshing with each other within the guide channel. The separable slide fastener stringers are moved again at the same speed to bring the rows of coupling elements into intermeshing engagement.

Method and apparatus for automatically threading separable slide

A pair of separable slide fastener stringers is fed in one plane along parallel spaced paths, respectively, toward throats of a Y-shaped guide channel in a slider fixed in position. Pins of the stringers are introduced into the guide channel through the throats, respectively, in the slider while keeping the separable slide fastener stringers in the parallel spaced paths. The separable slide fastener stringers are inserted through the slider with the pins guided by guide flanges, respectively, and a diamond of the slider while moving the separable slide fastener stringers in the one plane along the parallel spaced paths and at the same time allowing the stringer tapes to flex.

An apparatus for interengaging a pair of rows of slide fastener coupling elements on a pair of stringer tapes, respectively, with a pair of top end stops mounted on the stringer tapes respectively at confronting ends of the rows of coupling elements, includes a base and a pairing guide mounted on the base and normally defining a substantially Y-shaped guide channel including a pair of branched guide passages for receiving disengaged rows of coupling elements, respectively, and a joint passage for discharging interengaged rows of coupling elements. The pairing guide comprises first guide means fixed to the base and including first flange means defining the branched guide passages, and second guide means movably supported on the base and including second flange means normally defining the joint passage. The Y-shaped guide channel is thus normally defined jointly by the first and second flange means. The second flange means is retractable away from the first flange means in response to the engagement of at least one of the top end stops with the second flange means, whereby the top end stops can be discharged out of the pairing guide.

Apparatus for pairing two rows of slide fastener coupling elements

Disclosed are molds, one being stationary the other movable, for the injection molding of continuous slide fastener chain, each of the molds being provided with a upper runner stopper located at the end portion of a runner cavity on the tape entrance side of the molds, the upper runner stopper having a trapezoidal portion which projects toward the interior of the runner cavity, and with a lower runner stopper disposed on the tape exit side of the molds, the stationary mold having a positioning stopper adjacent said lower runner stopper, the positioning stopper having a trapezoidal portion of a shape to engage with a recess formed in the posterior end of a runner by means of the trapezoidal portion of the upper runner stopper.

Growing community of inventors

Kurobe, Japan

Mitsuo Sawada