DE2221020A1 - Metallic screw cap - Google Patents

Description

M α η «Ji ο η UU, i-le.Tiadorfati ·. 1? 2221020

503-18.7ΟΟΡ (18.701H) April 28, 1972

SOCIETE DE C0NDITI0NNEMENT EN ALTJMINIUM SCAL GP Paris (France)

Metallic screw cap

The invention relates to a metallic screw cap, in particular for containers made of glass large opening and external thread, its closure jacket below the thread on the container corresponding threads has a break line delimiting a guarantee ring.

The screw cap designed according to the invention cannot be opened without injury and thus ensures that the contents of the closed vessels are in their original state Fill level comes up for sale. Containers of the above type have long been used for the marketing of food, those like jams, vegetables and the like

503- (B i555) _Df-r (7)

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to be preserved, in use. The ones required for the sterilization of the vessel contents when the vessels are closed elevated temperatures generally create a negative pressure inside them after cooling, which is sufficient to hold the fastener in place with a connecting link arranged at the edge of the opening of the container is provided.

The sealing of the container at elevated temperatures requires sealing materials that are heat-resistant are, and so the choice for the closure material usually falls on metals. Usually the closures have one Sheath that surrounds the neck of the vessel to be closed over a variable height. For products that are not consumed all at once, screw closures are preferred in which the closure jacket is provided with threads either during its manufacture or during its application, in the second case the external thread on the neck of the vessel to be closed serves as a matrix for the formation of the threads.

Such closures are widely used today Use and meet the requirements of sterile packaging in a perfect way.

Due to the ever increasing transition of retail sales habits from grocery stores however, old-style self-service store problems arise for this type of packaging. So can the buyers walking up and down between the shelves with the goods put up for sale without effective supervision often do not resist the temptation to take a sample from the sales containers.

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In the case of the packaging of liquids, where the use of screw caps is common practice ₉ , this problem is solved in different ways, all of these solutions have the one feature in common that the jacket of the closure has a break line which is only bridged at individual points and a guarantee band in the form of a more or less wide ring, which is attached to a thickening on the outside of the bottle neck, for example by a folding process. This guarantee ring is always applied to the neck of the filled bottle.

A simple transfer of the closure method known for bottle filling to Behal = - The large opening is an obvious choice, but it poses various problems. In particular it would it may be necessary to replace the packaging machines that are customary today, which, however, represent a considerable amount of capital mean and thus make such an exchange economically unacceptable.

The invention is therefore based on the object to provide a closure that can be used today for the Sealing of containers with a large opening using conventional machines or can be applied by hand and still offers absolute security against undamaged detachment .

The task posed is based on a screw cap. of the type mentioned at the outset according to the invention thereby solved that the guarantee ring with inward facing elastic B3ockierorganen is provided, the one

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limit clear opening, the diameter of which is smaller than that of a blocking edge on the container to be closed, however, are directed so that when the wearer is placed on the container without changing the diameter withdraw from the guarantee ring.

In a preferred embodiment of the invention are the blocking organs by the lower edges of a series formed by slots in the closure jacket, which lie in one and the same plane parallel to the closure bottom and are pressed inwards into the lock. These slots can be part of the boundaries of the guarantee ring Form fault line and are then separated from each other by more or less wide webs that are at the moment the first time the container closed by the closure is opened. The slots can but also lie below the break line delimiting the guarantee ring, in which case their mutual distance is no longer of importance and can also be much larger than the bridges for bridging the Fault line corresponds to ,,

In the drawing, the invention is illustrated using preferred exemplary embodiments; show:

Fig. 1 is a side view of a first invention « according to trained lock;

FIG. 2 shows a section through the closure of FIG. 1;

Fig. 3 shows the neck of a device according to the invention trained closure lockable container with a large opening;

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FIG. K shows a second embodiment for a closure designed according to the invention in a side view; FIG. and

Fig. 5 shows a two-part closure according to the invention.

The closure 1 illustrated in FIGS. 1 and 2 is composed of a base 2 and a casing 3, the inner angle between the base 2 and the casing 3 being provided with an elastic seal k . To make it easier to screw the closure 1 on and off, the jacket 3 is provided with knurling 5 at the top; below this knurling 5, the jacket has 3 threads 6 »

The threads 6 extend only over the upper part of the casing 3 "and they end above a break line 7 which delimits a guarantee ring 8" The break line consists of incisions 9 "which are in one and the same plane parallel to the bottom 2 of the Closure 1 lie and between which the cohesion of the jacket 3 is effected by webs 10. The free edge 11 of the jacket 3 is rolled over, as is generally the case with closures of this type _{or the like}

The ring 8, which is bounded upwards by the break line 7 and downwards by the rolled edge 11, is also provided with a certain number of slots 12, the lower edges 13 of which are pressed inwardly into the closure 1, like this in particular Fig. Can recognize. In this way, the indented edges 13 form lips which reduce the inside width of the closure 1 and are attached to a ring or edge ] k on the outside

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of the neck of the container to be closed (Flg. 3) below whose external thread 15 can come to rest »

A further ring 16, which acts as a support, can also be arranged on the container lower than the edge 14 for the lower edge 11 of the jacket 3 is used.

As FIG. H shows, the slits 12 forming the lips with their lower edges 13 for reducing the inside width of the closure can be part of the break line 7 itself, whereby the overall height of the casing 3 can be reduced.

As finally Fig. 5 can be seen, one can Ring 8 designed in accordance with the invention also in connection use with two-piece closures, that is, with closures, the bottom 2 * of which is formed separately from its jacket 3 * and in it only by one folded edge 17 is held »

The application of the closure formed according to the invention - and this is an essential feature of the invention - does not differ in any way from the application one not according to the invention with a guarantee ring provided closure.

During one of the fasteners described above on tli '> Opening einnj B-ihalters set to go and by unscrewing: is ii crimped in place, Ai ^ gleitim by the edges Ij ii ^ bi Ida th lips without difficulty at> Iin external thread \ f> am container and along annchließ ^ nd Hhnr the ring] h hinwt ^1, ^, below never lossen vennkern HRIS. Every attempt

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unscrewing the closure automatically leads to a The webs which connect the ring 8 to the upper part of the casing 3 spring open.

Semi-finished closures are used in some machines for closing glass containers which the threads are not yet formed «The formation of the threads is on the neck of the to be closed Container itself made, for example, the external thread 15 of the container as a matrix for the binding the thread 6 is used.

The closures described above are also suitable for closing containers using this method »

In addition, the shape of the thread turns is irrelevant, and you can easily use multiple _{screw connections 9} Bajo = nett locks and the like. Likewise, the lips acting as blocking organs can have other shapes, for example rectangular.

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Claims (4)

Claims 1. Metallic screw cap, especially for containers made of glass with a large opening and external thread, the closure jacket below the thread on the cup or Cup corresponding thread turns has a break line which delimits a guarantee ring, characterized in that the guarantee ring (8) with inwardly directed elastic blocking members (13) which limit a clear opening, the Diameter is smaller than that of a blocking edge (i4) on the container to be closed, but are directed in such a way that when the closure (i) is placed on the container without changing the diameter of the guarantee ring (8) step back. 2. Closure according to claim 1, characterized in "that the blocking members are formed by the lower edges (13) of a series of slots (12) in the closure jacket (3, 3 ¹ ), which in one and the same plane parallel to the closure base (2, 2 ¹ ) and are pressed inwards into the lock (i). 3. Closure according to claim 2, characterized in that the slots (12) are part of the guarantee ring (8) forming the delimiting break line (7). 4. Closure according to claim 2, characterized in that the slots (12) below the guarantee ring (8) delimiting fault line (7) lie " 209847/010 /; Empty soap,