DE2206538B2 - Closure for container - Google Patents

Description

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The invention relates to a closure for containers, in particular bottles with a gas pressurized content, which is provided with a handle flap Has holding member which is intended to grip around the mouth bead of the container from above.

Closures of the type mentioned are already known. They are used increasingly, mainly at Beverage companies, mainly because they can be made from plastic and therefore can be produced in large quantities at low unit prices. Your advantage for the user is present all in the fact that they allow a container to be opened after part of its gas pressure has been removed To be able to close the contents gas-tight again. This is especially true for beverage bottles that contain mineral water, Containing must, beer or wine is an advantage. Lifting off is made easier by the grip tab, so that bottle openers that you don't always have to hand can be dispensed with.

However, the grip tab has an undesirable side effect. Namely, he trains with him adjoining the part of the closure a zone which is stronger than the rest of the closure, so leave them the deformation due to the gas pressure in the container is opposed to a higher resistance lead to the fact that when the gas pressure is reached at which the closure blows off from the container is, the closure on the opposite side of the handle flap first lifts off the container, so that it is then thrown away at a considerable angle to the longitudinal axis of the container will, in most cases, be inclined instead of vertical up. This can mean a serious risk to people who come directly into the container are located.

The object of the invention is therefore to provide a closure of the type mentioned, which despite asymmetrical formation when the critical gas pressure mentioned is exceeded, at least approximately is thrown away in the axial direction of the container.

According to the invention, this object is achieved in that the holding member has an edge which is intended to be gripped around the mouth bead from the outside at its edge has increasing thickness from the grip tabs towards the diametrically opposite point.

An embodiment of the closure according to the invention is shown in the drawing. It shows

F i g. 1 shows a cross section through the closure along the line I-I and

F i g. Figure 2 is a plan view of the closure.

1 with the mouth bead on the neck 2 of a bottle is referred to; the closure is placed on this bead This has a holding member 3, an elastic, cambered disc 4 and against the inside of the bottle a clamping ring 5 encompassing the mouth element 1, which is in the bottle when the gas pressure increases rests against a stop edge 6 on the mouth ridge 1 slightly lifting the disc 4, the clamping ring 5 is pressed against this stop edge 6; through this If the closure is raised further, a slight rotation (eversion) of the retaining element occurs to the outside, whereby this clamping ring 5 is pressed even more strongly against the mouth bead 1.

The disc 4 is reinforced towards its edge d. H. their thickness increases from the center 41 towards the edge 42. It is thereby achieved that the disc 4, although elastic in the middle, however, there is a higher resistance to the gas pressure

A sealing lip 7 is attached approximately at the level of the edge 42 of the disk 4. She is, as can be seen, rounded at their periphery so that they are not rubbing on when the lock is released Container neck is damaged, as is the case, for example, with the sawtooth-like sealing lips Case would be.

The disk 4 is flattened by the gas pressure developing in the container; the resulting Deformation presses the sealing lip 7 against the bottle neck 2 so that a good seal is achieved.

Below the disk 4, the holding member 3 ends in a pointed guide or centering lip 8, which has a slightly smaller outer diameter than the inner diameter of the bottle so that a annular gap 9 is formed, which facilitates the mechanical placement of the closure; he serves to accommodate the manufacturing tolerances between the individual bottles.

On the outside of the holding member 3, a tab 10 is attached with which the closure can be easily removed from the container at any time.

As already mentioned, it has been shown through experiments that this grip tab, in particular by his Ribs 10a, with increasing gas pressure, asymmetrical stress relationships in an exactly circularly symmetrical one Closure causes The consequence of this is that such a closure after exceeding the critical Gas pressure first lifts off the container on the side opposite the grip tab 10 and then under a very large one to the longitudinal axis of the container Angle (up to 45 ° and more) is thrown away. Since one is used to cork stoppers that they are practically thrown away in the longitudinal direction of the bottle, this is strongly deviating direction of movement unexpectedly and a lock that flies away in this direction may cause injuries by people standing next to the container. To achieve that also such a closure behaves like a cork stopper in this respect is the one encompassing the mouth bead from the outside Edge 31 of the support member 3 is formed so that its thickness away from the grip tab 10 to the diametrical opposite point increases. This is achieved in that the outer wall 32 of the edge 31 is arranged eccentrically with respect to the inner wall 33. This eccentricity is in the figures for clarity drawn exaggeratedly large, in reality

Fractions of millimeters are sufficient to compensate for tensions. The tension will be as a result, although not evenly distributed over the circumference of the closure, they are, however, in relation to a plane 11 (Fig.2) to some extent the same again, so that a The closure is roughly thrown away axially

1 sheet of drawings

Claims (1)

Claim: Closure for containers, in particular bottles with contents under gas pressure which have a holding member provided with a grip tab which is intended to encompass the mouth bead of the container from above, thereby characterized in that the holding member (3) at its edge (31) intended to encompass the mouth bead from the outside is one of the Has grip tabs (10) from increasing against the diametrically opposite point in thickness.