| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pull ring integrated with a horizontal rib exhibiting a large anti-skid effect by molding the horizontal rib in a "force-out" molding manner without considerably reducing the projecting height of the horizontal rib, in a pull-open middle plug. <P>SOLUTION: In the pull-open middle plug 1, the anti-skid horizontal rib 3 is erected in an inclined posture on the pull-out direction side of a mold for molding on an inner peripheral surface of the pull-ring 2 with a fill-up finger tip hooked thereto. Since the horizontal rib 3 is inclined, the substantial projecting height of the horizontal rib 3 is increased to improve the hooking of the finger tip. <P>COPYRIGHT: (C)2010,JPO&INPIT |
