Ykk Corporation

Yutaka Yokoyama

Makoto Yamazaki

Yasutoshi Nozawa

Akio Yunoki

Chien Min Chen

The invention provides a slide fastener with a top end stop, wherein a linear fastener element row is sewed on the fastener tape, the top end stop is formed by burying linear fastener elements facing a space portion with synthetic resin, a projecting portionto be in contact with a slider is formed on a side surface of the top end stop for preventing the slider from slipping out, a protrusion protruded upward along the sewing thread is formed on a front surface of the top end stop, a groove is carved in a center longitudinal direction of the protrusion, and the sewing thread is prevented from being deflected and exposed on the front surface of the top end stop by being pressed by a projecting ridge provided in a molding die for forming the groove toward the linear fastener elements.

Slide fastener

A drilling apparatus, in which a hole and an insertion hole for a drilling rod are formed at a drilling position of a table and at a sheet pressing member capable of approaching or leaving a surface of the table, respectively, the drilling rod made of metal, capable of rotating at high speeds and reciprocating vertically are inserted through the both holes, the drilling rod has smooth peripheral and front end faces composed of at least part of a circular section having no blade, and a predetermined clearance is provided between the diameters of the hole and the insertion hole and the diameter of the drilling rod, whereby by pressing the drilling rod rotating at high speeds to the sheet, a sheet material is melted by frictional heat so that a beautiful hole is formed.

Growing community of inventors

Taipei, Taiwan

Yutaka Yokoyama