DE8611698U1 - Closure for containers, in particular for bottles - Google Patents

Description

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• ■ a cm rr · · »· ■" · · ■ · 1 30th In the latter case, the screw cap I Vl ti
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• it * 4th 5 with its mouth facing up on a twist 2 15 closure for containers, in particular for arranged device that makes him rotate Bottles added, then a drop of warm art Closures in the form of screw caps for 35 material to an eccentric point of the soil 20 necks of containers, like bottles, show in space l "ll '' Il '' ■
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.. .. ··· "ι · mean a sealing arrangement on the inside area of their bottom parts. In some cases becomes one on the inner surface of the bottom part I. glued seal used, but this solution 25 is not fully satisfactory and it will a seal preferred, which by means of a soft plastic material is realized, that is reflected on the inner surface of the bottom part being hit or splashed on. I. Γ- I.
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partly dripped, which is distributed on it. It can be seen that the final coating from the soft plastic material one Has considerable thickness, because the warm plastic material because of the centrifugal force endeavors to distribute itself to the outside world, and yet at the point on which the wall of the bottle neck rests, there must be a sufficient thickness. Since that Soft Runststoffmateriai used is relatively expensive, is the price for such Screw cap high. In addition, the coating made of plastic material will relatively peel off often from the bottom part of the screw cap.

The object of the innovation is to avoid these disadvantages and to provide a seal to provide lighter weight, while ensuring the same tightness and the adhesion to the bottom part of the screw cap is greatly improved.

To solve this problem, the bottom part of the screw cap is provided with an annular groove, which has the shape of a dovetail in its cross-section and converges to his Opening is, with this annular groove an anchoring option for the coating soft plastic material. This way, the size of the coating can be significant be reduced, its shape, its dimensions and the characteristics of the Composition and the coefficient of friction can be selected suitable to achieve a perfect Sealing with the existing bottle

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jibe taking into account their differences in shape and different Ensure application.

The innovation is shown in the drawing and is described in the following description explained in more detail. Show it:

1 shows a section through a screw cap without the coating or 10

Lining made of soft plastic material,

FIG. 2 shows a section corresponding to FIG. 1, but with a seal.

In Figure 1, a screw cap 1 made of a plastic material such as polypropylene is shown, that withstands elevated temperatures and pressures,

which work on him when he hits the neck of a 20

Container is screwed, in which there is a carbonated liquid. This screw cap has a bottom part 2 and a side part 3, the inner surface of which

is provided with a screw thread 3a. _m

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The inner surface of the bottom part 2 has a central recess 2a, which has an edge 2b defines in which a dovetail-shaped annular groove 2c is arranged, i.e., it has the shape of a converging in the direction of the opening of the screw cap 1 in cross section isosceles trapezoid.

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In the usual way, the screw cap is arranged with its opening facing upwards on a rotating void, and the liquid plastic material is poured out above the groove. By the rotation of the liquid material evenly distributed over the entire length of the groove and depending on its viscosity and its composition it forms a band 4 _V, the surface 4a or more wsni ⁿ sr concave toward the Öffnun <? of the screw cap.

Such a formed closure is made possible by the arrangement of the one provided in the groove 2c Tape the realization of the sealing of a bottle neck at the point of the outer ring surface of the neck.

Such screw caps are preferably used on returnable glass bottles, i.e. multiple times used bottles, the edges of which are sometimes notched. Because of the considerable thickness of the tape and its Arrangement in the bottom part of the screw cap, i.e. opposite to the edge of the bottle neck, an excellent seal is guaranteed even in the event that the bottle is opened and closed again several times will.

According to the innovation, a screw cap is made available, which is particularly suitable for the carbonated beverages is adapted and the requirements of the pressure and the temperature is enough that on one

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such drinks are used to seal the bottle *

Claims (1)

ft ■ · t I 10 15th Claim to protection 1 * Closure for containers, especially for bottles, with the inside of the bottom with a Lining made of soft material is provided, which forms a seal, characterized in that that in the inner surface of the base (2) an annular groove (2c) is provided, the side surfaces of which converge towards the opening of the closure (1) in such a way that the annular groove (2c) in the Cross-section has the shape of a dovetail and a band (4) in the groove Kunstf.toffmaterial is anchored, which is directed towards the opening of the closure Surface (4a) is convex. 20th 25th 30th 35 t « t t ·«