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US 4,427,126 AGranted
Vented closure
AssigneeEthyl Products Company
InventorEfrem M. Ostrowsky
Life of this patent
Estimating the term…
Abstract
A thermoplastic closure suitable for fitment to a threaded container neck is disclosed. The closure has at least one venting groove in the sidewall traversing the closure thread. A rigidifying means is provided at the point of traverse of the venting groove and the closure thread. This rigidifying means has a perpendicular height measured from the sidewall less than the perpendicular height of the closure thread also measured from the sidewall. The rigidifying means provides hoop strength to the closure sidewall.
Claims4
In a thermoplastic closure suitable for fitment to a threaded container neck wherein the closure includes:
- (a) a top wall,
- (b) an annular sidewall downwardly depending from the top wall,
- (c) a closure thread carried on the inside surface of the annular sidewall for cooperation with the container neck thread,
- (d) a sealing system above the closure thread for effecting a gas-tight seal between the closure and the container, and
- (e) at least one venting groove in the sidewall traversing the closure thread,
- the improvement which comprises a rigidifying means at each point of traverse by said venting groove of said closure thread, said rigidifying means being dimensioned so that it has a perpendicular height measured from the inside surface of said sidewall less than the perpendicular height of said closure thread measured from the inside surface of said sidewall, whereby pressurized gas can pass through said venting groove to the atmosphere as said closure is removed from said container.
3 more elements
Dependencies are inferred from the claim text.