| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pull-top type container lid with good responsiveness to external force or changes in inner pressure which can be smoothly fractured and opened at the beginning, and subsequently the fracture spreads stably to the entire weak section such as a score even if the container lid body is made of a soft material such as plastic. <P>SOLUTION: The container lid with good responsiveness is a lid body equipped with a tab. The tab for opening motion is positioned on the lid body in a way that a base end position comes near the periphery of the lid body and is equipped with a first weak section which is to be an opening of the container positioned at the base side across a joint section with the lid body against the longitudinal direction of the tab and a second weak section positioned on a handle side of the tab. The base end position becomes a central axis of rotation during the opening motion pulling up the tab, and first the second weak section is fractured and becomes an initial opening, and then by subsequently pulling up the tab the fractured section is diffused up to the first weak section. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
