Closure for a container

A closure for a container having a circular opening defining an axis and a lip around said opening, the closure comprising:

• an inner component having a collar portion for locating about the exterior of the container beneath the lip of the container;
• and an outer component for fitting over the inner component and interacting therewith for releasably securing the collar portion under the lip, the collar portion comprising a ring and a plurality of spaced apart radially moveable parts around it circumference joined at their lower ends to the ring and a plurality of spaced apart upstands on the ring interposed between said radially moveable parts, the outer component comprising a cap having an upper part for closing the mouth of the container and a skirt part depending therefrom for fitting around said collar portion, the skirt part having spaced apart features projecting from its inner surface for interacting with the collar portion such when the cap is in a first (closed) rotational position relative to the collar portion, substantially radially inward facing surfaces of said features are aligned with said radially moveable parts so as to secure them beneath the lip of the container and, when the cap is in a second (open) rotational position relative to the collar portion, said substantially radially inward facing surfaces are no longer aligned with said radially moveable parts and said upstands on the collar engage substantially axially facing surfaces of said spaced apart features so as to limit axial movement of the collar portion into the cap wherein the outer component is formed of a plastics material comprising polyoxymethylene.

A container having a circular opening defining an axis and a lip around said opening and a closure for closing said opening comprising:

• an inner component having a collar portion for locating about the exterior of the container beneath the lip of the container;
• and an outer component for fitting over the inner component and interacting therewith for releasably securing the collar portion under the lip, the collar portion comprising a ring and a plurality of spaced apart radially moveable parts around it circumference joined at their lower ends to the ring, the outer component comprising a cap having an upper part for closing the mouth of the container and a skirt part depending therefrom for fitting around said collar portion, the upper part including, or having attached thereto, a bore feature which, in use, extends into the mouth of the container, the bore feature being adapted to carry an o-ring for providing a seal between the bore feature and an inner surface of the container and the skirt part having spaced apart features projecting from its inner surface for interacting with the collar portion such when the cap is in a first (closed) rotational position relative to the collar portion, substantially radially inward facing surfaces of said features are aligned with said radially moveable parts so as to secure them beneath the lip of the container, the inner surface of the container having a lead-in surface adjacent said opening and a plurality of spaced apart venting grooves in said lead-in surface to facilitate venting of the container as the o-ring is withdrawn therefrom wherein the outer component is formed of a plastics material comprising polyoxymethylene.

A container and a closure therefor, the container having an opening defining an axis passing therethrough and an outwardly projecting lip around the opening and a plurality of spaced apart camming features on or adjacent an underside of the lip, the closure being in the form of a cap comprising an upper portion for closing said opening and a skirt portion depending from the upper portion for securing the cap to the container, with a substantially rigid connection between the upper portion and the skirt portion, the skirt portion of the cap having a plurality of spaced apart inwardly projecting first parts around an inner circumference thereof for locating beneath the lip of the container to secure the cap to the container, at least part of the skirt portion being sufficiently elastic such that when applied to the container said plurality of first parts can be snap-fitted over the container lip so as to be located beneath the container lip, said plurality of inwardly projecting first parts also being arranged such that upon subsequent twisting of the cap about said axis relative to the container in a loosening direction, they interact with said camming features of the container so said first parts are flexed outwards to disengage them from the underside of the lip, said closing portion also comprising a bore component having a sealing member on, or mountable on, an exterior thereof, such that, when the cap is mounted on the container, the bore component extends into the interior of the container so that the sealing member engages with an internal surface of the container to provide a seal between the closure and the container, wherein the closure is formed of a plastics material comprising polyoxymethylene.