| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easy-to-open container lid in which an annular plug for sealing a container mouth is formed on the peripheral part of a top plate and a through-hole made in the central part of the top plate is covered with a breakable sheet having a resin layer at least on the inside of the container, the container being designed such that sealability by the annular plug is prevented from degrading or the annular plug is prevented from being damaged even in the case where the sheet member is disposed on the underside of the top plate and its edge is buried in the lid. <P>SOLUTION: The easy-to-open container lid 1 includes the annular plug 15 formed on the peripheral part of the underside of the top plate 11 in order to seal the container mouth. The container lid 1 also includes the sheet member 19 disposed on the underside of the top plate 11 so as to cover the through-hole 18 made in the central part of the top plate 11. The sheet member 19 is breakable when pressed by a straw and has the resin layer at least on the inside of the container. A thick-walled portion 15a bulging out is formed at the lower end of the annular plug 15. The edge 19a of the sheet member 19 is buried inside the thick-walled portion 15a. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
