Sealing Structure of Container and Lid for Such Structure

Abstract

A sealing member 13 is heat-sealed to the upper end surface of the mouth portion 12 of a container, and a lid 15 which is provided with a top panel 15 a that covers the mouth portion 12 of the container, and which has an inner peripheral projection 15 e that is positioned in the vicinity of a place inner than the inner periphery of the mouth portion 12 of the container on the inside surface of the top panel 15 a is fitted to the mouth portion 12 to make it easy to peel (open and peel) the sealing member 13 while high sealing property is ensured, and to prevent the seal member 13 from peeling at the inner periphery of the mouth portion 15 of the container which peeling is caused by a rise in the internal pressure in the container.

1 . A sealing structure of a container, the sealing structure comprising heat-sealing a seal member to the upper end surface of the mouth portion of a container and fitting a lid to said mouth portion to thereby seal the inside of the container,
 wherein an inner peripheral projection that is positioned in the vicinity of a place inner than the inner periphery of said mouth portion and is in direct contact with said seal member is formed on the inside surface of the top panel of said lid.   
   
   
       2 . A sealing structure of a container according to  claim 1 ,
 wherein said lid is provided with a cyclic projection that is in contact with the upper end surface of said mouth portion through said seal member on the inside surface of the top panel thereof.   
   
   
       3 . A sealing structure of a container according to  claims 1 ,
 wherein said lid is fitted to said mouth portion so as to form a clearance between said lid and said seal member.   
   
   
       4 . A sealing structure of a container according to  claim 1 ,
 wherein said lid is fitted to said mouth portion in a resealable manner.   
   
   
       5 . A lid fitted to the mouth portion of a container sealed with a seal member, the lid comprising:
 a top panel covering said mouth portion; and   an inner peripheral projection that is positioned in the vicinity of a place inner than the inner periphery of said mouth portion and is in direct contact with said seal member on the inside surface of the top panel when it is fitted to the mouth portion.   
   
   
       6 . A lid according to  claim 5 , the lid having a cyclic projection that is in contact with the upper end surface of said mouth portion through said seal member on the inside surface of said top panel.