Stopper for a bottle and sealing element for said stopper

1. A method of sealing a bottle designed for commercial bottling of a beverage or liquid food using a system comprising a stopper and a sealing element,

the stopper comprising a stopper part for introduction into a mouth of the bottle, and a head part for remaining outside the mouth, the head part having a diameter that is larger than that of the stopper part;

wherein the stopper part comprises an interlocking mechanism for engaging with a counterpart interlocking mechanism of the sealing element which is separate from the bottle; wherein the sealing element is configured to be forced against an inner wall of the mouth, thereby being brought into a sealed position, upon introducing the stopper part into the mouth, in which sealed position the stopper is held on the bottle by way of a frictional connection; and

wherein the interlocking mechanisms are configured to permit bringing the sealing element into an unsealed position by an unsealing action which comprises rotating the stopper with respect to the bottle;

the method comprising the following steps:

assembling the system by introducing the stopper part of the stopper into the sealing element, and

introducing the system into the mouth of the bottle until the sealed position is reached.

2. The method according claim 1 , wherein the interlocking mechanism of the stopper comprises one or more screw threads; and

wherein the one or more screw threads are broken longitudinally by one or more plain surfaces to accommodate parting lines.

3. The method according to claim 1 , wherein the stopper part of the stopper is configured so that the sealing element, after being brought into the unsealed position, is retained on the stopper part of the stopper when the stopper is pulled out of the mouth.

4. The method according to claim 1 , wherein a cavity is formed on the head part of the stopper; and

wherein the cavity has a rectangular cross section when viewed from the top.

5. The method according to claim 1 , wherein the sealing element comprises a sealing part being adapted to be pressed against an inner wall of the mouth, upon introducing the stopper part into the mouth;

wherein elements are formed on the outer side of the sealing part which are adapted to be pressed against the inner wall of the mouth in the sealed position and to build up an under-pressure or suction force in one or more areas between the sealing part and the inner wall of the mouth when the sealing element is brought into the sealed position; and

wherein the elements formed on the outer side of the sealing part have the shape of adjacent ribs.

6. A system for sealing a bottle designed for commercial bottling of beverage a beverage or liquid food,

the system comprising a stopper and a sealing element,

the stopper comprising a stopper part for introduction into a mouth of the bottle, and a head part for remaining outside the mouth, the head part having a diameter that is larger than that of the stopper part;

wherein the stopper part comprises an interlocking mechanism for engaging with a counterpart interlocking mechanism of the sealing element, which is separate from the bottle;

wherein the sealing element is configured to be forced against an inner wall of the mouth, thereby being brought into a sealed position, upon introducing the stopper part into the mouth, in which sealed position the stopper is held on the bottle by way of a frictional connection; and

wherein the interlocking mechanisms are configured to permit bringing the sealing element into an unsealed position by an unsealing action which comprises rotating the stopper with respect to the bottle; wherein,

the system being designed to be assembled by introducing the stopper part of the stopper into the sealing element, and being introduced into the mouth of the bottle until the sealed position is reached.

7. The system according to claim 6 , wherein the system configured to be introduced into the bottle by dropping the system into the mouth of the bottle.

8. The system according to claim 6 , wherein the system being designed such that the system is in equilibrium when subject to gravity.

9. The system according to claim 6 , wherein the system being designed such that the system when assembled has an overall conical shape.