초록 ▼

A closure is described for sealing retortable containers. The closure has a disc shaped metal cover with a grooved sealing portion at its outer edge containing a sealant and a plastic ring for engaging the container. A clamping action holds sealant in the cover groove against a rim of the container

A closure is described for sealing retortable containers. The closure has a disc shaped metal cover with a grooved sealing portion at its outer edge containing a sealant and a plastic ring for engaging the container. A clamping action holds sealant in the cover groove against a rim of the container and the relative dimensions of the closure groove and the container are chosen for providing a tight seal particularly after retorting.

대표청구항 ▼

A sealed package comprising the combination of: a container 3; a composite closure 1 having a metal cover 2 and a molded plastic ring 4 sealing the container; a generally cylindrical annular sealing surface on the radially innermost surface of the container rim 17; the annular outer edge of said met

A sealed package comprising the combination of: a container 3; a composite closure 1 having a metal cover 2 and a molded plastic ring 4 sealing the container; a generally cylindrical annular sealing surface on the radially innermost surface of the container rim 17; the annular outer edge of said metal cover 2 having a downwardly facing groove 7; a grooved sealant 8 in said metal cover 2 groove 7; and means creating a pressure contact between said container rim 17 annular sealing surface and the radially innermost surface of said sealant 8 groove provided by said sealant 8 groove at its center line D having a greater diameter than the diameter C of said container rim 17 at its center line when the container 3 is at room temperature.