# US 4,393,979 A · Closures for containers

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- Number: US 4,393,979 A
- Document ID: US4393979A
- Status: Granted
- Kind: A
- Application number: 06/253,365
- Filed: 1981-04-13
- Granted: 1983-07-19
- Earliest claimed: 1980-04-15
- Assignees: Metal Box Limited
- Inventors: Martin F. Ball; Fred Fidler
- Web page: https://patentgrep.com/patent/US4393979A

## CPC

- B65D 17/506: {Rigid or semi-rigid members, e.g. plugs}
- B65D 39/04: Cup-shaped plugs or like hollow flanged members
- Y10S 220/19: Rubber plugs and caps
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A closure for an aperture in a container wall having an annulus of gasket material around the aperture, has a plug portion and a peripheral flange extending axially and outwardly of the plug portion to terminate in a feather edge adapted to engage the gasket material when the plug portion is inserted in the aperture. In order to seal the aperture, the gasket material applied to the wall to surround the aperture and the plug portion of the closure is force fitted into the aperture to hold the feather edge of the flange in sealing engagement with the gasket material. The closure may be used to close cans of beverages and permit easy access to the contents by pushing the plug portion into the can.

## Claims

### Claim 1

A container having a wall, an aperture in the wall, an annulus of gasket material around the aperture on the inside of the container wall and a plug closure including a plug portion, said plug portion including a cylindrical wall and an end wall, said cylindrical wall being disposed in said aperture, said plug closure being constructed from relatively rigid and stiff synthetic copolymeric plastic material, a flange extending generally radially outwardly of the cylindrical wall to surroundingly underlie an annular wall portion of said container wall, said flange being radially outwardly converging in axial cross-section to thereby define a deformable feather edge, said feather edge terminating in a terminal edge held in formed sealing engagement with the gasket by frictional engagement of the cylindrical wall in said aperture.

### Claim 2 (depends on 1)

The container as defined in claim 1 including a line of weakness in said end wall defining an openable portion thereof.

### Claim 3 (depends on 2)

The container as defined in claim 2 including a pull ring attached to said openable portion.