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US 4,747,511 AGranted
Plug-type openers for plastic can ends
AssigneeSun Coast Plastics, Inc.
InventorsHerbert V. Dutt, Donald F. Yeager, Dixie L. Weir
Life of this patent
Estimating the term…
Abstract
An easy-open lid for an all-plastic beverage can is disclosed, the easy-open feature including a removable closure plug secured in a dispensing aperture formed in the lid of the can. A pull tab is secured to the closure plug for removal of the entire plug.
Claims16
An easy-open closure for a container, comprising:
- a container end having a top wall portion and means to engage a container;
- a dispensing aperture in the top wall portion of said container end;
- plug means shaped to snugly fit in said dispensing aperture, said plug means including
- (a) a central wall portion surrounded by a depending peripheral flange extending through and engaging the peripheral edge of said aperture, and
- (b) outwardly extending shoulder means engaging the top surface of said top wall, the peripheral edge of said dispensing aperture being clamped between said flange and said shoulder means to secure said plug against removal by internal pessure within a container closed by said container end;
- lift tab means formed unitarily with said plug means, said lift tab means being adapted to remove at least part of said plug means from said dispensing aperture to permit opening of said dispensing aperture;
- and
- tether means secured to said plug means.
5 more elements
An easy-open closure for a dispensing aperture formed in a container end for a pressurized container, comprising:
- a container end having a top wall including a dispensing aperture;
- plug means shaped to snugly fit in said dispensing aperture, said plug means including a peripheral side wall and a central flexible concave wall integrally formed with said peripheral side wall,
- an exterior groove on said side wall, said groove receiving the peripheral edge of said aperture, said side wall being forced radially outwardly by upward flexure of said central wall due to pressure within a container to which said container end is affixed, the radially outward motion of said side wall providing a sealing contact between said groove and said peripheral edge of said aperture.
Dependencies are inferred from the claim text.