| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made vessel capable of sufficiently ensuring the airtightness to a predetermined angle even when a cap is turned, and stabilizing a plug opening condition. <P>SOLUTION: An upper end part of an outer circumferential surface of a mouth part 4 of a bottle-shaped synthetic resin vessel body 2 is formed to be a smooth seal surface 8 without any unevenness over the entire circumference having no parting line. Even when the cap is turned, a plug-opening (leak) angle can be maintained until a predetermined angle, and airtightness of the vessel can be sufficiently ensured. <P>COPYRIGHT: (C)2003,JPO |
