Vented beverage closure
AssigneeEthyl Molded Products Company
InventorWerner R. Luenser
Life of this patent
Estimating the term…
Abstract
A threaded thermoplastic closure suitable for fitment to a threaded container neck is disclosed. The closure is provided with one or more vent grooves cut through the primary threads in the inner wall of the closure skirt. The ends of each thread segment are rounded and a smaller reinforcing secondary thread within the groove extends across the groove connecting the thread segments. The lower edge portion of the secondary thread is aligned with the lower edge portion of the adjacent segments of the primary thread to maximize the venting space over the secondary thread.
Claims15
A thermoplastic closure suitable for fitment to a threaded container neck, comprising:
- (a) a top wall,
- (b) an annular sidewall downwardly depending from the top wall,
- (c) a primary closure thread carried on the inside surface of the annular sidewall for cooperation with the container neck thread, said primary closure thread being divided into a plurality of primary thread segments by one or more venting grooves,
- (d) at least one venting groove in the sidewall traversing the closure thread, said venting groove dividing the primary closure thread so as to form the primary thread segments,
- (e) a reinforcing secondary thread within said venting groove and extending across said venting groove connecting the primary thread segments of the primary closure thread, said secondary thread having a smaller height than the primary thread segments, the lower edge portion of said secondary thread being aligned with the lower edge portion of each adjacent primary thread segment and at least the median edge portion of said secondary thread being offset from the corresponding portion of said primary thread segment, and
- (f) a sealing system above the closure thread for effecting a gas-tight seal between the closure and the container.
Dependencies are inferred from the claim text.