Receptacles – Closures – With closure opening arrangements for means
Patent
1989-02-02
1990-03-06
Marcus, Stephen
Receptacles
Closures
With closure opening arrangements for means
220284, 220306, 220307, 220 73, B65D 4306
Patent
active
049058614
DESCRIPTION:
BRIEF SUMMARY
This invention is concerned with lidded containers, and relates particularly, but not exclusively, to lidded containers for paint.
Paint has conventionally been supplied in metal containers having metal lids which fit inside the tops of the containers. However, metal containers have various disadvantages, and in particular are liable to damage if subjected to impact, e.g. by dropping, during transit. Also, such impact may cause displacement of the lids, and, in order to minimise the risk of such displacement, it is necessary to provide clips or boxes to retain the lids. Unfortunately, such clips, (which are made as separate components), or boxes complicate the packaging operation, and involve substantial extra costs.
Making the container of a plastics material instead of metal provides the possibility of significantly reducing the risk of impact damage. The desirability of providing means for minimising risk of displacement of the lids would, however, still exist, and the present invention seeks to deal with this by providing a plastics container having a simple and effective lid-retaining means.
According to the present invention, there is provided a lidded container made of plastics material, said container comprising a body with a top rim and a lid with a flange for sealing engagement inside said rim, characterised in that the lid has a web part carrying said flange, which depends therefrom, and also carrying a depending skirt for surrounding the outside of the rim, said skirt having a plurality of inwardly-directed projections each engageable in latching relationship in a recess on the outside of the rim, and said web part having apertures corresponding to said projections, whereby a tool can be inserted through each aperture to disengage the corresponding projection from said recess.
Any suitable kind of plastics material may be employed, but the plastics material should be of a resiliently flexible nature. The plastics material should also be resistant to materials to be stored in the container. For example, if the container is for gloss paint, the plastics material should be resistant to the solvent in the paint. For this purpose, we have found that a polyester plastics material is particularly suitable.
The rim may be inwardly or outwardly projecting but preferably has an inwardly-directed flange, and it is against this flange that the lid's web-borne flange seats. The whole rim portion of the container may be made as a separate part, which is then securely mounted (by welding, say) on to the upper edge of the container body.
There are preferably at least three of the inwardly-directed projections, and (of course) a corresponding number of apertures.
Preferably, at each aperture said skirt has thinner and therefore weaker portions (e.g. provided by internal or external grooves) on each side of each projection, whereby leverage by said tool can cause the skirt to fracture and the part of the skirt between the thinner portions (together with the associated projection) to become detached from the lid.
The projections and the rim are preferably so formed that, when the lid is pressed on to the container body, the projections ride over a rib on the outside of the rim before entering said recess, but that the projections cannot ride over the rib in the reverse direction.
It will therefore be seen that the container has releasable lid-retaining or--latching means near the outside and sealing means between the lid and rim spaced inwardly from the lid retaining means.
The container can be of any shape and size, the rim portion (if separate) and the lid then matching this. Generally, however, it is most convenient--equally for paint containers--if the whole is eventually cylindrical, with the lid therefor annular and the rim annular.
The following is a description, though only by way of example, of an embodiment of the invention, reference being made to the accompanying schematic drawings, in which
FIG. 1 is a section view through part of the top of a container with a lid resting thereon but not in its seale
REFERENCES:
patent: 3406817 (1968-10-01), Lane et al.
patent: 3609263 (1971-09-01), Clementi
patent: 3811597 (1974-05-01), Frankenberg et al.
patent: 4165018 (1979-08-01), Giggerd
patent: 4177930 (1979-12-01), Crisci
patent: 4347943 (1982-09-01), Hackwell et al.
patent: 4530442 (1985-07-01), Vogel, Jr. et al.
Boxall Charles W.
Calvert John R.
Edwards Brian
Rowlands Martyn O.
Sworn Christopher H.
Marcus Stephen
Reed Packaging Limited
Stucker Nova
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