초록 ▼

A plastic container closure comprising a top panel, a skirt portion, an annular protruded portion that is formed inwardly from the inner surface of the top panel and on the inside of a portion near the root of the skirt maintaining a small gap therebetween, and a sealing liner that is fitted by pres

A plastic container closure comprising a top panel, a skirt portion, an annular protruded portion that is formed inwardly from the inner surface of the top panel and on the inside of a portion near the root of the skirt maintaining a small gap therebetween, and a sealing liner that is fitted by press-molding on the inside of the top panel, wherein a substantially vertical portion is formed on said liner along the inner surface of the annular protruded portion, and sealing performance is maintained by the engagement between the outer edge of the mouth of the container and the substantially vertical portion. Since the sealing is accomplished over a surface having a predetermined width in the up-and-down direction, the sealing performance is not impaired even when the top panel is deformed by the pressure. Moreover, favorable sealing performance is maintained even against shock that is given to the container at the time of fitting the closure.

대표청구항 ▼

[ The invention claimed is:] [1.] A plastic container closure for sealing a mouth of a container, comprising:a top panel;a skirt extending downwardly from a peripheral edge of said top panel, and having a threaded portion formed in an inner side of said skirt;an annular protrusion extending downward

[ The invention claimed is:] [1.] A plastic container closure for sealing a mouth of a container, comprising:a top panel;a skirt extending downwardly from a peripheral edge of said top panel, and having a threaded portion formed in an inner side of said skirt;an annular protrusion extending downwardly from said top panel, being inside the skirt, and near a root of the skirt, thereby maintaining a small gap between said annular protrusion and the skirt; anda sealing liner fitted inside of said top panel, and having a substantially vertical portion formed in place both along and in contact with the inner surface of said annular protrusion; anda plurality of ribs arranged along a circumference between the annular protrusion and a portion near the root of the skirt at an angle that is tilted relative to the radial direction so as to bridge the skirt and the annular protrusion together;wherein the substantially vertical portion of the liner maintains a seal with an outer edge of the mouth of the container when the plastic container closure is placed on the container.