BACK-OFF RESISTANT CLOSURE SYSTEM

摘要

A resealable anti back-off closure system that is substantially leak-proof and back-off resistant. A closure and container include mating screw threads. The closure includes recesses formed within the interior surface of the closure adapted to cooperate with protrusions formed on the neck of the container. The protrusions and recesses releasably lock together when the closure is screwed onto the container. The closure and container form at least two seals when coupled, including a flange seal and a land seal.

主权项

1. A closure system assembly for a container comprising:
a closure defining an interior surface defining a first screw thread; a container defining a finished neck defining a second screw thread, the second screw thread for mating with the first screw thread; a closure lock comprising at least one recess adapted to cooperate with at least one protrusion, one of the at least one recess and the at least one protrusion formed within the interior surface of the closure, the other one of the at least one recess and the at least one protrusion formed into the neck of the container, whereby the at least one protrusion and at least one recess releasably and recloseably lock together when the closure is screwed fully onto the container; a flange seal comprising a flange extending from an interior surface of the closure and contacting an interior surface of the container neck such that the interior surface of the neck and the flange form a liquid-tight seal; and a land seal comprising a first land area defined by an interior surface of the closure and contacting a second land area defined at the top of the neck of the container such that the first land area and the second land area form a liquid-tight seal.