| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To resolve a technical problem that a finger touch with a cut mark generated at the upper end surface of an opening cylinder part by UPI method is restricted by a shape of the opening cylinder part and provide a container made of synthetic resin under a low cost that can be used safely and peacefully. <P>SOLUTION: An opening cylinder part of a container made by an injection blow molding is formed such that the upper end surface of the opening cylinder part is formed into such a shape that the outer peripheral part is located at a slight lower position stepwise as compared with the inner peripheral part of the upper end surface, a plug is pushed into the container from above a parison held in a blow molding shell mold during a blow molding operation, and a non-required portion above the upper end surface of the opening cylindrical part is cut and removed by a cutting part constituted by the shell mold and the plug at the outer peripheral edge of the inner peripheral part. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
