초록 ▼

A tamper-evident closure construction for a container with a neck having a discharge opening therein includes a base cap having a base wall and a nozzle portion projecting from the base wall and an annular flange projecting radially outwardly from the nozzle portion adjacent to the base wall and hav

A tamper-evident closure construction for a container with a neck having a discharge opening therein includes a base cap having a base wall and a nozzle portion projecting from the base wall and an annular flange projecting radially outwardly from the nozzle portion adjacent to the base wall and having a frustoconical first cam surface thereon and a flat planar first stop surface thereon. The construction also includes an overcap with a cylindrical, flexible and resilient skirt connected to the base wall by a circular array of frangible webs, and having a flat planar second stop surface at the distal end thereof and an annular groove mateably receiving the annular flange and defining a frustoconical second cam surface engaging the first cam surface. When the overcap is moved from the initial position along the nozzle portion and away from the base wall the frangible webs are broken, the cam surfaces flexing the overcap skirt until it clears the annular flange, whereupon it returns to an unflexed condition wherein the stop surfaces are engageable with each other to prevent return of the overcap to its initial position.

대표청구항 ▼

[ I claim:] [1.] A tamper-evident closure construction for use with a container of the type having a neck with a discharge opening therein, comprising:a base cap engageable with the container neck and having a first stop surface thereon, andan overcap having a flexible and resilient portion connecte

[ I claim:] [1.] A tamper-evident closure construction for use with a container of the type having a neck with a discharge opening therein, comprising:a base cap engageable with the container neck and having a first stop surface thereon, andan overcap having a flexible and resilient portion connected to the base cap in an initial position by a tamper-evident connection which is severable to permit movement of said overcap from said initial position to a second position,said overcap having a second stop surface thereon engageable with the first stop surface when the overcap is in the second position for preventing return of the overcap to its initial position.