초록 ▼

A seal and closure for a container end includes a metal foil seal having a cylindrical part sealed to the inner surface of the container adjacent the end, a transverse diaphragm part recessed inwardly from the end, and a tear tab on the diaphragm. An annular groove is formed in the cylindrical part

A seal and closure for a container end includes a metal foil seal having a cylindrical part sealed to the inner surface of the container adjacent the end, a transverse diaphragm part recessed inwardly from the end, and a tear tab on the diaphragm. An annular groove is formed in the cylindrical part between the container end and the diaphragm, the groove defining a tear line so that the membrane and the inward portion of the cylindrical part separate from the remainder thereof when the tear tab is pulled. An insertable lid covers the seal.

대표청구항 ▼

A method for producing a closure for a container comprising the steps of preforming a foil membrane into a cup-like shape having a generally cylindrical wall with upper and lower substantially cylindrical portions, a transverse wall at one end and an outward annular flange at the other end; forming

A method for producing a closure for a container comprising the steps of preforming a foil membrane into a cup-like shape having a generally cylindrical wall with upper and lower substantially cylindrical portions, a transverse wall at one end and an outward annular flange at the other end; forming an annular radially extending shoulder between said upper and lower cylindrical portions of said cylindrical wall to offset said upper and lower portions from each other and compressing the membrane material of said shoulder to a thickness significantly less than that of the adjacent membrane material in said upper and lower portions; inserting the preshaped membrane into a tubular container with the flange overlying the container edge; shaping the shoulder and the cylindrical portion between the shoulder and the one end to conform to the container wall; and sealing the cylindrical wall to the interior wall of the container on both sides of the compressed shoulder and the outward annular flange to the container edge.