STACKABLE LID FOR CONTAINERS

Abstract: A stackable lid for containers formed of a first pressed carboard sheet piece (1), in the shape of an in­ verted tray the inner perimeter of which corresponds to the outer perimeter of the container opening to be closed, and a second piece (2) of the same material, as well in the shape of an inverted tray with a lesser diameter and a height equivalent to the height of the first piece, the second piece being adhered juxtaposed to the inner face of the first piece, the outer outline of the second piece be­ ing equivalent to the inner outline of the container open­ ing, the second tray having a perimetral skirt (3) jux­ taposed to the bottom of the first tray (1).

Description: The present invention relates to a stackable lid for containers, in particular for jars and other cylindrical containers. BACKGROUND OF THE INVENTION The containers of the above kind are usually provided with discoidal lids, integral moulded from a plastic material, with the feature that, generally speaking, the lid has a peripheral channel-like groove to fit onto the edge of the container opening, as well as an embossed portion covering about all of the lid and protruding towards the inside of the container such that further to its contributing to the internal fitting of the lid within the container opening, it prevents the lids stacked in the container closing machine from becoming fitted one within the other thus hindering their handling in order to obtain an automatic closing of the container (see CH-A-443949). The need for forming the lids with the above construction has prevented hitherto the manufacture of these lids from cardboard by pressing or stamping out at a cost which is lower than in the case of lids moulded from thermoplastic material, because the pressing and stamping means used with cardboard are unable to give the required pressing of the lids which is necessary to prevent their fitting with one another (see DE-A-1786586) DESCRIPTION OF THE INVENTION The above problem has been solved with the lid according to the invention, which can be manufactured from cardboard. With respect to the present state of the art represented by DE-A-178658 which describes a stackable lid manufactured from drawn or pressed paper material in the shape of a tray the present invention is characterized in that the lid has adhered to it another piece of the same material, also in the shape of a pressed tray, of a height corresponding to that of the first piece and contracting the inner face of the said first piece, yet having an external outline corresponding to the inner outline of the container opening. This second piece has a marginal skirt in contact with the bottom of the first tray. BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the instant specification, a drawing is enclosed wherein a practical embodiment of the lid according to the invention is shown only by way of example. In the said drawing: Figure 1 is a view in diametral section of the lid in disassembled condition; Figure 2 is a similar view of the assembled lid, and Figure 3 shows several stacked lids, in diametral section. DESCRIPTION OF A PREFERRED EMBODIMENT The lid as shown in the drawing consists of a pressed piece 1 of cardboard or the like material in the shape of an inverted shallow tray, the internal diameter of which corresponds to the outer diameter of the container opening to be closed. A second piece 2, also in the form of a tray, of a lesser diameter and height preferably corresponding to the height of the first piece, is incorporated within the said first piece 1. The outer diameter of the tray 2 corresponds to the inner diameter of the container opening to be closed. The tray 2 has an bow-shaped marginal skirt 3 which is placed in contact with the inner face of the first tray bottom, such that a channeled groove 4 is formed between the faces of both trays, into which the edge of the container to be closed is to fit. As clearly shown in figure 3 of the drawing, when the lids are stacked, they cannot fit one within the other, since this is prevented by the internal piece 2 protruding from the lid bottom. This lid may be manufactured from pressed cardboard pieces at a lower cost than equivalent lids of thermoplastic material.

Claims: 1. Stackable lid for containers, comprising a pressed sheet piece (1), preferably of cardboard material, in the shape of an inverted tray the inner perimeter of which corresponds to the outer perimeter of the container opening to be closed, characterized in that it comprises a second piece (2) of the same material, in the shape of a tray with a smaller diameter and a height corresponding to the height of the first piece, being adhered in contact with the inner face of the said first piece, the outer outline of the second piece corresponding to the inner outline of the container opening, the second tray having a perimetral skirt (3) in contact with the bottom of the first tray (1).

Inventors: TEIXIDOR CASANOVAS, PEDRO
Applicants: PAPER, S.A.
Application year: 1988
Main classification: B65D43
IPC codes: B65D43