Ykk Corporation

Yoshida Kogyo K.k.

Osamu Igarashi

Shigeyoshi Takazawa

Kenji Yuki

Yoshifumi Nakata

Michio Ito

Akio Yunoki

Yukio Maede

A slide fastener in which an insert pin and a box pin of a separable bottom stop assembly made of synthetic resin are molded integrally along side edges of fastener tapes. The insert pin and the box pin have peripheral shapes allowing themselves to be inserted into element row guide grooves of a slider, and are molded integrally such that the entire insert pin and the box pin incline toward rear face sides of the respective tapes from their inner side edges to outer side edges relative to tape planes of the fastener, said rear face sides having no core threads of the core portions. Thus, resin layers having substantially even thickness can be formed on both the front and rear face sides of the core portions so that the resin layers never peel away from rear surfaces of the fastener tapes, and the core portions and their peripheries never become brittle.

Slide fastener with separable bottom stop assembly and method of manufacturing the same

A reinforcement tape is stuck to an outer front surface of a fastener tape and a fastener element removed portion at a space portion, in which fastener elements are removed and to which the separable bottom end stop of the concealed type slide fastener, for example, a insert pin or the like is attached, by ultrasonic welding. The reinforcement tape may be, for example, a tape whose front surface is made of a thermoplastic elastomer film while its rear surface is made of hot melt adhesive agent. At the same time of the above sticking, an edge portion is formed into a U shape and its surface is reinforced and then, the insert pin or the like is attached to this portion. The fastener tape itself does not come into contact with a diamond of a slider, even if outer face of the U-shaped edge portion comes into sliding contact with the diamond, so the fastener tape is protected from being worn or damaged.

Concealed type slide fastener with separable bottom end stop

A method for welding synthetic resin members includes the steps of detecting a temperature of a high frequency electrode or an ultrasonic horn (or an anvil) by a temperature detector, cooling the high frequency electrode or the ultrasonic horn (or the anvil) by cooling means when the temperature detected by the temperature detector during a high frequency or ultrasonic vibration exceeds a preset temperature range, thereby reducing the temperature rapidly down to the preset temperature range, and stopping an operation of the cooling means when the temperature of the high frequency electrode or the ultrasonic horn (or the anvil) is reduced to the preset temperature range.

Method and apparatus for welding synthetic resin member by high frequency or ultrasonic heating

In a trousers-fly-serging apparatus, a fly is fed on and along a feed table by a retaining portion of a linear supply section, and pressing levers attached to lower portions of four corners of a support body move down to press and retain the fed fly with tip ends of the pressing levers. Then, a rod actuated by a pressure cylinder is towed to rotate a rear portion of the support body about a pin as a pivot provided at a front end portion of the support body, so that one corner portion of a leading end portion of the fly is trimmed into an arcuate shape by a cutter and at the same time, the arcuately trimmed edge portion is serged by a needle. According to the apparatus, therefore, the one corner portion of the leading end of the fly can be trimmed into a uniform arcuate shape.

Trousers-fly-serging apparatus

Disclosed is a system for inspecting the attached state of a separable end stop attached to a slide fastener. The system is used with an apparatus for manufacturing a slide fastener equipped with a separable end stop. Fastener stringers are transported by a transfer unit while a separable end stop is attached to the stringers and a completed slide fastener is discharged by a discharge unit. The discharge unit operates in a first state for engaging and feeding a slide fastener, and a second state for allowing a slide fastener to pass freely therethrough. The transfer unit passes a slide fastener through the discharge unit and transports the slide fastener to an inspection apparatus located downstream of the discharge unit. The inspection apparatus grasps a separable end stop on a slide fastener delivered by being passed through the discharge unit by the transfer unit, whereby the transfer unit releases the slide fastener and is restored to a predetermined position for the manufacture of the next slide fastener.

Growing community of inventors

Toyama-ken, Japan

Osamu Igarashi