Closure with means for introducing two additives into a beverage container

1. A closure device for use with a container having a main liquid compartment and an opening with a container neck, the closure device comprising:

a cap member comprising a first fluid chamber having a bottom aperture in the first fluid chamber,

a housing arranged to move relative to the cap member between a first armed position of the closure device and a second firing position of the closure device,

wherein the housing includes a second fluid chamber and a first plug member adapted to close the bottom aperture in the first fluid chamber in the first armed position of the closure device,

wherein the cap member includes a second plug member adapted to close the bottom aperture in the second fluid chamber in the first armed position of the closure device,

wherein the first plug member is at least partially removed from the bottom aperture in the first fluid chamber in the second firing position of the closure device, and

wherein the second plug member is at least partially removed from the bottom aperture in the second fluid chamber in the second firing position of the closure device.

2. The closure device of claim 1 , wherein the housing includes a side wall having an inner surface provided with an internal thread which is adapted to engage with an external thread provided on the container neck.

3. The closure device of claim 2 , wherein the cap member comprises a side wall having an internal thread provided on its inner surface and adapted to engage with an external thread provided on the outer surface of the side wall of the housing.

4. The closure device of claim 1 , wherein in the first armed position the cap member is engaged with the housing by means of a detachable member.

5. The closure device of claim 1 , wherein the first fluid chamber is pressurised and contains a liquid additive and a propellant, and the second fluid chamber contains a second additive.

6. The closure device of claim 1 , wherein the first fluid chamber has a bottom wall and an annular channel provided on a lower surface of the bottom wall, and wherein the bottom aperture in the first fluid chamber comprises one or more orifices provided in the annular channel.

7. The closure device of claim 6 , wherein the first plug member comprises a cylindrical wall portion adapted to sealingly engage with the annular channel.

8. The closure device of claim 6 , wherein the second plug member is provided on a lower surface of the bottom wall of the first fluid chamber and extends through the second fluid chamber.

9. The closure device of claim 8 , wherein the second plug member sealingly engages with the bottom aperture of the second fluid chamber when the closure device is in the first armed position, the bottom aperture being provided in the bottom wall of the second fluid chamber.

10. The closure device of claim 1 , wherein the second fluid chamber comprises a cylindrical side wall which is formed integrally with the housing by moulding.

11. The closure device of claim 6 , wherein the annular channel includes walls, and wherein the first plug member includes sealing means to provide a seal between a lateral external surface of the first plug member and the walls of the annular channel.

12. The closure device of claim 1 , wherein one of the second plug member and an internal surface of the bottom aperture of the second fluid chamber is provided with sealing means to provide a seal between a lateral external surface of the second plug member and the bottom aperture of the second fluid chamber.

13. A combination of a container and a closure device comprising

the container having a main liquid compartment, a container neck and an opening, wherein the container contains a liquid, and

wherein the closure device is secured to the container neck to close the container, the closure device comprising

a cap member comprising a first fluid chamber having a bottom aperture in the first fluid chamber,

a housing arranged to move relative to the cap member between a first armed position of the closure device and a second firing position of the closure device,

wherein the housing includes a second fluid chamber and a first plug member adapted to close the bottom aperture in the first fluid chamber in the first armed position of the closure device,

wherein the cap member includes a second plug member adapted to close the bottom aperture in the second fluid chamber in the first armed position of the closure device,

wherein the first plug member is at least partially removed from the bottom aperture in the first fluid chamber in the second firing position of the closure device, and

wherein the second plug member is at least partially removed from the bottom aperture in the second fluid chamber in the second firing position of the closure device.

14. The container of claim 13 , wherein the housing includes a side wall which is secured to the container neck by means of internal threads provided on the side wall of the housing.

15. A method of introducing an additive liquid into a container, the method comprising:

providing a closure device for use with the container, the container having a main liquid compartment and an opening with a container neck, the closure device comprising:

a cap member comprising a first fluid chamber having a bottom aperture in the first fluid chamber,

a housing arranged to move relative to the cap member between a first armed position of the closure device and a second firing position of the closure device,

wherein the housing includes a second fluid chamber and a first plug member adapted to close the bottom aperture in the first fluid chamber in the first armed position of the closure device,

wherein the cap member includes a second plug member adapted to close the bottom aperture in the second fluid chamber in the first armed position of the closure device,

wherein the first plug member is at least partially removed from the bottom aperture in the first fluid chamber in the second firing position of the closure device, and

wherein the second plug member is at least partially removed from the bottom aperture in the second fluid chamber in the second firing position of the closure device, the closure device having a liquid additive and a pressurised propellant inside the first fluid chamber and a second additive in the second fluid chamber,

while the closure device is in the first armed position securing the closure device to the neck of a container containing a liquid,

raising the cap member relative to the housing, thereby at least partially withdrawing the first plug member from the bottom aperture of first fluid chamber and the second plug member from the bottom aperture of the second fluid chamber,

urging the additive liquid from the first fluid chamber into the second fluid chamber under pressure of the pressurised propellant in the first fluid chamber to mix with an additive provided in the second fluid chamber, and

urging the additive liquid and second additive from the second fluid chamber into the container under pressure of the pressurised propellant in the second fluid chamber.

16. The method of claim 15 , including the step of mixing the additive liquid with liquid in the container.

17. The method of claim 15 , wherein the liquid in the container is a beverage or a chemical or pharmaceutical composition.