Receptacles – Closures – With closure opening arrangements for means
Patent
1987-04-16
1989-01-03
Hall, George T.
Receptacles
Closures
With closure opening arrangements for means
220257, 220258, B65D 1734
Patent
active
047950552
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an easily-opened container comprising a container body with an opening portion and a sealed bottom portion, a lid with a central lid portion and a peripheral portion disposed outside the lid portion, and one or more connecting devices which sealingly fixing the lid to the container body for sealing of the container and an opening means. The opening means includes a weakened portion located in the lid and formed by a region of material of reduced strength, the weakened portion being located inside the connecting devices and extending in the circumferential direction of the opening portion and at least partially around the opening porton. In the weakened portion, the central section is separable from adjacent regions of the peripheral portion. The opening means further includes means for facilitating the above-mentioned separation.
BACKGROUND OF THE INVENTION
In many contexts, there is a need for easily-opened containers. In many physical applications, there are also requirements that the opened container may be readily resealable. As a rule, the requirement of ready reclosure prevails in situations where the container is gradually emptied of its contents in individual stages. Such batchwise emptying of a container is often employed when the container is used for the storage of foods.
A further requirement placed on a container for the above-outlined purposes is that it must, as far as is possible, be of a construction which safeguards against unintentional opening. In particular, in physical applications in which the lid of the container is provided with a weakened portion, for example, a circumferential weakened zone, there may be a risk of such intentional opening when the lid portion inside the weakened zone is exposed to compressive forces.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a container in which the above-outlined requirements have been satisfied.
According to the invention, the opening portion of the container body is, in a defined region, provided with a depression or recess located beneath the weakened portion. The opening means includes a fulcrum-action unit pivotably supported on the container body at a fulcrum and including a pull member and a pressure member located on opposite sides of the fulcrum. The pressure member rests against the outer surface of the lid in the region of, or adjacent to, the weakened portion at a location above the depression or recess. On raising of the pull member, a lever action is created about the fulcrum to cause the pressure member to produce rupture of the weakened portion. When the weakened portion has been ruptured or relatively slight forces are necessary to continue opening of the container by stripping at the weakened portion.
In one preferred embodiment of the present invention, the, pull unit is fixed to the central lid portion, preferably fulcrum-effect is fixed to the central lid portion by means of a rivet-like arrangement of plastic material. In fields of application in which the lid consists of plastic material, the rivet-like arrangement also consists, as a rule, of plastic material. When the rivet-like arrangement consists of plastic material, it generally constitutes an integral part of the lid.
In one embodiment of the present invention, the pressure member terminates in the region most distal from the support point by an edge which is located above the weakened portion. The pull member can be constituted as a pull-ring.
In yet a further preferred embodiment of the present invention, the opening portion is provided with a flared flange to which the peripheral portion of the lid is sealingly fixed. In certain applications, the peripheral portion of the lid consists of a flared flange.
Generally, the central peripheral portion of the lid is located at a lower level than the flared flange of the lid, while in other applications, the central portion of the lid can be located flush with or higher than its flared flange.
In still a further preferred embod
REFERENCES:
patent: 3552634 (1971-01-01), Ollier et al.
patent: 4501375 (1985-02-01), Katsura
patent: 4555056 (1985-11-01), Bernhardt
Hall George T.
PLM AB
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