초록 ▼

A container closure system comprising a threaded cap and a threaded neck wherein the cap is affixed to the neck by direct axial application so that the mating threads slip past one another and into engagement. The cap further includes sealing means to capture and constrict the outer diameter of the

A container closure system comprising a threaded cap and a threaded neck wherein the cap is affixed to the neck by direct axial application so that the mating threads slip past one another and into engagement. The cap further includes sealing means to capture and constrict the outer diameter of the neck, and valve means to plug the container opening in the neck and expand the outer diameter of the neck, so that the sealing means and valve means cooperate to improve sealing of the cap and neck. The cap and neck further include tamper-indication means to prevent removal of the cap without activation thereof. The tamper-indication means includes a novel skirt, pull tab and membrane configuration. The container neck may include interrupted threads which do not traverse the parting line and an additional annular seal below the threads on the container neck.

대표청구항 ▼

[ What is claimed is:] [1.] In combination, a container neck and a container cap,said container neck having an upper opening, a first threaded neck portion depending downwardly from said upper opening and having at least one external thread, and a second neck portion depending downwardly from said t

[ What is claimed is:] [1.] In combination, a container neck and a container cap,said container neck having an upper opening, a first threaded neck portion depending downwardly from said upper opening and having at least one external thread, and a second neck portion depending downwardly from said threaded neck portion, said second neck portion including external anti-rotation means; andsaid container cap having a top surface, an upper skirt portion depending downwardly from said top surface, said upper skirt portion having at least one internal thread, and a tamper indicating ring depending downwardly from said upper skirt and integrally connected thereto via a frangible line of weakness, said tamper indicating ring including internal anti-rotation means, said tamper indicating ring having at least two sections separated by at least two slots, said tamper indicating ring including at least two pull tabs, each pull tab having a first end connected to an outer surface of the section of the tamper indicating ring adjacent one of said slots and a free end extending over said adjacent slot and a plurality of frangible membranes extending, respectively, between the outer surface of the tamper indicating ring sections and the free end of each pull tab, wherein pulling on one of said pull tabs breaks the frangible membrane exposing one of said at least two slots followed by removal of the tamper indicating ring from the upper skirt by breaking along the line of weakness while the remaining membrane stays intact and the frangible ring is completely removed from the upper skirt as a single unit.