Method for the preparation of a beverage by centrifugation using a container

1. A method for preparing a beverage from a container containing beverage ingredients by centrifugation of the container in a beverage preparation device;

said container comprising:

an outer wall and an inner wall; each wall having a peripheral portion extending around a central axis (I) and a bottom portion;

a lid covering said outer and inner walls; and forming with said inner wall an inner cavity containing beverage ingredients,

an outer collecting cavity positioned between the outer and inner walls,

beverage outlets or outlet precursors positioned on the peripheral portion of the inner wall,

wherein the method comprises:

supplying liquid in the inner cavity,

rotating the container around its central axis (I) to form beverage outlets from the outlet precursors by effect of the centrifugal forces of liquid acting against the peripheral portion of the inner wall during the rotation of the container,

forcing liquid through beverage outlets from the inner cavity to the outer cavity under the effect of centrifugal pressure, and

maintaining an overpressure of supplied liquid in the container to enable the beverage to be drained from the outer cavity out of the container.

2. The method of claim 1 , wherein the outlets are formed by tearing a membrane of the inner wall to uncover premade openings covered by said membrane or by tearing pre-weakened areas of the inner wall or by expanding pre-cuts formed in the inner wall.

3. The method of claim 1 , further comprising the step of draining the beverage through a beverage outlet provided in the bottom portion of the outer wall along said central axis (I) while maintaining said overpressure.

4. The method of claim 1 , wherein the overpressure of supplied liquid is of at least 300 mbar.

5. The method of claim 1 , wherein the container is rotated by a rotating holding assembly of the beverage preparation device firmly holding a peripheral flange of the container.

6. The method of claim 1 , wherein liquid is supplied in the container through the lid.

7. The method of claim 6 , wherein the lid is perforated by a liquid injector of the beverage preparation device.

8. A method for preparing a beverage from a container containing beverage ingredients by centrifugation of the container in a beverage preparation device;

said container comprising:

an outer wall and an inner wall; each wall having a peripheral portion extending around a central axis (I) and a bottom portion;

a lid covering said outer and inner walls; and forming with said inner wall an inner cavity containing beverage ingredients,

an outer collecting cavity positioned between the outer and inner walls,

beverage outlets or outlet precursors positioned on the peripheral portion of the inner wall,

wherein the method comprises:

supplying liquid in the inner cavity,

rotating the container around its central axis (I) to force liquid through beverage outlets from the inner cavity to the outer cavity under the effect of centrifugal pressure, and

maintaining an overpressure of supplied liquid in the container to enable the beverage to be drained from the outer cavity out of the container, wherein beverage is drained directly into a receptacle without contacting the beverage preparation device.

9. The method of claim 8 , wherein the bottom portion of the outer wall is unsupported by the beverage preparation device.

10. The method of claim 8 , wherein a beverage outlet forms a duct protruding outwardly from the outer wall of the container.