Receptacles – Closures – Having means for securing or retaining closure in its closed...
Patent
1994-03-16
1995-11-21
Shoap, Allan N.
Receptacles
Closures
Having means for securing or retaining closure in its closed...
220717, 222570, B65D 2548, B65D 4532
Patent
active
054678889
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an auxiliary device for sealing cans for beverages or the like, of the type having on an end wall a disposable opener mechanism, i.e. a mechanism which after uncovering an opening in the end wall does not permit resealing thereof, the auxiliary device having the form of a tubular element which tapers off from a comparatively wide collar to a narrower spout portion and which, adjacent the collar, comprises means for snapping the auxiliary device on to the opening end of the can, preferably to an annular element defining the end wall and, in the area of the spout portion, comprises means, e.g. a cap, permitting both closing and opening of the spout portion as desired.
DESCRIPTION OF THE PRIOR ART
An auxiliary device of the type generally described above is disclosed in U.S. Pat. No. 4,883,192. A similar auxiliary device is also disclosed in U.S. Pat. No. 4,579,257.
Contradictory demands are placed on such auxiliary devices for cans. On the one hand, the collar of the auxiliary device, which should be snapped on to one end of the can, particularly to the annular element which in most cases defines the can end wall, should be designed to have such a close fit relative to the can end or the annular element that the auxiliary device, when applied, is firmly fixed to the can so as to withstand any excess pressure arising in the interior which is common to the can and the auxiliary device. In cans with carbonated beverages there is always a certain excess pressure which can become comparatively high if the can is subjected to shaking or impacts. The auxiliary device needs to be firmly fixed to the can also for the reason that it should not be unintentionally detached from its applied position by some simple mechanical action. On the other hand, it should be possible to intentionally fix the auxiliary device to the can and detach it therefrom, without applying extremely great forces, since otherwise the auxiliary device will be considered too complicated to use.
SUMMARY OF THE INVENTION
The present invention aims at eliminating the above-mentioned problems in prior-art can auxiliary devices and providing such a device which can be applied to and intentionally be detached from cans in a smooth and easy and also quick manner, at the same time as it can be firmly retained on the can when used. The main object of the invention is therefore to provide a can auxiliary device which is reliably retainable when used and easily detachable when intentionally removed and which can be repeatedly used for different cans. A further object is to enable manufacture of the auxiliary device by simple and inexpensive means.
At least the main object of the invention is achieved by means of the features defined in the characterising clause of claim 1. Preferred embodiments of the invention are recited in claims 2-7.
Further Description of the Prior Art
GB 1,378,591 discloses a cap which is intended for bottles and is retained in its sealing state on the bottleneck by means of an external locking ring which, in the bottling procedure, is pressed down along a collar-shaped skirt of the cap for the purpose of snapping or clamping a thickened portion on to the lower edge of the cap skirt in the area below a shoulder on the bottleneck. Even if GB 1,378,591 mentions the possibility of using said ring repeatedly, after opening the bottle--which can be carried out only after tearing off a special securing element--this is a disposable cap construction in so far as it is not intended for use on other bottles than the one to which it was initially applied. In this prior-art cap construction, there is no connection which enables pivoting of the locking ring between the locking and unlocking positions. It is therefore necessary for the ring to be pressed down in parallel with the cap, which is difficult to carry out manually if re-use is considered.
Moreover, NO 107,742 discloses a disposable cap with a special locking ring which, when pressed down to the lower portion of a cap skirt
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patent: 2958439 (1959-04-01), Yochem
patent: 3680731 (1972-08-01), Lelyk et al.
patent: 3851788 (1974-12-01), Hammes
patent: 4248262 (1981-02-01), Iwanaga
patent: 4883192 (1989-11-01), Krugman
patent: 5090583 (1992-02-01), Hoffman et al.
patent: 5165579 (1992-11-01), Edison
patent: 5176278 (1993-01-01), Quarberg
Brandstrom Paul
Nord Runo
Newhouse Nathan
Paul & Martha Brandstrom AB
Shoap Allan N.
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