초록

A closure having an insert which acts as a barrier over a container neck lip to selectively shield the product being packaged. An elastic sealing member which can be in the form of an O-ring is compressed between the insert and the container neck lip by a threaded cap of the container.

대표청구항 ▼

A closure particularly adapted to maintain a sealing relationship with the lip of a container neck, comprising: a cap having a top and an annular skirt depending from the periphery of said top having internal threads for engaging external threads on said container neck; a preformed insert having a t

A closure particularly adapted to maintain a sealing relationship with the lip of a container neck, comprising: a cap having a top and an annular skirt depending from the periphery of said top having internal threads for engaging external threads on said container neck; a preformed insert having a top and a depending plug dimensioned for an interference fit with said container neck; and an elastic sealing member dimensioned to engage said container neck lip and the top of said insert and to be compressed therebetween; whereby a seal is established and maintained between said closure and said container neck by the preformed insert being held in position relative to said container neck by said plug, a rigid structure is maintained on both sides of the container neck lip by said insert plug and the cap skirt, and said elastic sealing member being compressed between said insert top and container neck lip sustaining a hermetic seal even during distortion that takes place in an elevated temperature environment.