| 摘要 |
PROBLEM TO BE SOLVED: To retain the liquid-tightness against the inside face of the opening neck, by suspending the cylindrical wall from the peripheral edge of the rear face of the top wall of a cap body to form a sealing cylinder and boring pierced holes connecting the clearance between the vertical wall formed on fitting the pouring cylinder and a seal, at the top wall of the outside of the pouring cylinder. SOLUTION: A cap 1 is constituted of a cap body 2 and a cover 3. In the cap body 2, the top wall 5 is extended from the upper end of the peripheral wall 4 and a pouring cylinder 6 is erected from the center of the top wall 5 and a cutting cover 7 is provided on the inside top wall 5. When such a cap 1 is applied after charge of a hot liquid, the fitting protrusion 19 of the inside face of the peripheral wall 4 is fitted to a projection 21 of the outer periphery of the opening neck 20. The sealing part 12b of the sealing cylinder 12 is stuck with pressed to the inside face of the neck 20. The sealing part 12b of the sealing cylinder 12 heated by the charge of hot liquid is prevented from the deformation thereof, since it is cooled down by the connection with the outside through the pierced holes 13 on the top wall 5, connecting to the clearance between the vertical wall 12a and the sealing part 12b. |
