Receptacles – Closures – With closure opening arrangements for means
Patent
1991-11-20
1993-06-15
Shoap, Allan N.
Receptacles
Closures
With closure opening arrangements for means
220266, 220324, 220339, 220355, B65D 1734
Patent
active
052190870
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a tamperproof reclosing device, designed for portioning-out containers and which comprises two closing elements, connected to each other, namely a cover frame having a groove, into which a plane cut upper edge of a container will be pushed and fastened by means of a weld joint, a glue, a wax or the like, and a cover element, connected to said frame element by means of hinges and able to be snapped in and releasably secured in the interior of said cover frame, preferably in such a way that the reclosable container will be powder and vapor tight.
The invention particularly relates to a reclosing device of this type, which is transport protected in a tamperproof way, the reclosing cover element being designed in such a way that it is possible to directly and quickly see whether the container having such a reclosing cover has been unduly opened up.
BACKGROUND OF THE INVENTION
Many different types of such tamperproof or transport protected reclosing devices are known. The majority of the known constructions are based on the concept, that the cover frame and the reclosing cover, when the container has not yet been broken open, are to be connected in such a way, that some part of the frame or the cover must be broken or smashed in order to open up the reclosing cover, or that some part of the cover must be cut or torn in order to gain access to the product in the container.
Thus, U.S. Pat. No. 3,966,080 describes a reclosing device, in which the cover frame and the reclosing cover are molded together in such a way, that the cover is connected to the frame along the hinged portion as well as along the opening edge of the cover, and the container is opened up by prying open or pressing down the cover in such a strong way, that the joint between the opening edge of the cover and the frame will be broken. Such a device is difficult and expensive to manufacture and often a relatively large force is required to open up the container by breaking the joint between the cover and the cover frame.
European patent No. 72,294 shows a reclosing device, which can be manufactured in a comparatively simple way by molding a plastic material, the cover element and the frame element being turned up in one single plane and the frame, in order to provide a tamperproof protection, being designed with projecting pins and the cover element with corresponding holes, and the reclosing cover, before putting on the cover on a container, being turned down above the frame in order to let the pins in the frame project upwards through said holes in the cover, subsequent to which the projecting parts of the frame pins are reshaped by means of heat in order to make them wider and able to lock the cover element against the frame element. The container can subsequently be opened up by breaking the pins or cutting them. The breaking of the widened parts of the pins can also create difficulties, and the locking of the cover against the frame requires an additional working moment, since the pins are to be shaped by heating.
SUMMARY OF THE INVENTION
Applicant's U.S. Pat. No. 4,883,193 relates to a way of applying a tamperproof protection by instead providing the cover element with a barbed pin, which can be freely introduced downwards through a hole in the frame, but which, when the cover and the frame are connected, is not locked against the frame until a container is pushed into the groove of the frame, since the material itself of the container presses the barb on the pin against an edge of the frame and in this way prevents the cover from being separated from the frame. This reclosing device can also be manufactured in a simple way having a cover and a frame turned up in one single plane, but also as to this type of container a certain amount of work is required in order to break loose the downwardly projecting pin and in this way fold the cover upwards from the frame and open up the container.
The object of the present invention is to suggest a tamper-proof-protected reclosing device of
REFERENCES:
patent: 1236471 (1917-08-01), Norwood
patent: 3604596 (1971-09-01), Khoury et al.
patent: 3966080 (1976-06-01), Bittel
patent: 4883193 (1989-11-01), Christensson
Akerlund & Rausing Licens AB
Shoap Allan N.
Stucker Nova
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