| 摘要 |
<p>1482270 Continuous coupling elements for sliding clasp fasteners YOSHIDA KOGYO KK 30 Dec 1974 [29 Dec 1973] 55986/74 Heading E2S The invention relates to a method of manufacturing a continuous coupling element of folded meandering type having a series of U-shaped transverse portions each comprising a head at one end and a pair of legs extending from the head toward the other end and where the legs are connected by a series of longitudinal connective portions each of which interconnect the adjacent U-shaped portions and which are to be alternately arranged on the opposite sides of a stringer tape. According to the invention, the method comprises providing a blank strip 10 of sheet like material, alternately forming transverse cuts 12 of predetermined length in the blank strip from its opposite sides to provide a continuous rod like member 13 of zig-zag configuration, reshaping the rod like member into flat meandering configuration 14 such that the major transverse portions of the rod like member are arranged parallel to each other with predetermined longitudinal spacings, applying pressure centrally to each transverse portion to form lateral protuberances 15 which are necessary to provide a coupling head of the coupling element, and bending the transverse portions into the shape of a "U" to form the folded meandering type configuration. As shown, the blank strip of sheet like material, such as thermoplastic synthetic resin, of a suitable width and thickness, is indexed forward along a linear path over a base frame 20, Fig. 4, to succeedingly pass through a cutting mechanism 21 comprising a pair of rotary cutters, Fig. 4, which are driven out of phase and arranged on opposite sides of the strip; a forming mechanism comprising single and double prong dies 27, 28 respectively which are reciprocal toward, and away from each other to reform the zig-zag rod-like member 13 into meandering shape; and a vertically-reciprocable punch 23 to deform the lateral protruberances 15 centrally of the transverse portions. The member 13 then proceeds to a bending member 24 which includes an upright U-shaped guide channel 31 and a toothed wheel 32 which is fixed to a shaft 33 which is rotatable in step with the indexed movement of the member 14 to force the latter into, and through, the guide channel 31 and bend it into "U" shape. When the blank strip 10 is made of thermoplastic synthetic resin the cutting and forming mechanisms 21, 22, and the punch 23 may be heated. The bending, and punching, operations can be carried out simultaneously.</p> |
