Method for capping or closing containers and capping or closing machine

1. A method of closing or capping containers comprising bottles, cans or similar containers containing an oxygen-sensitive liquid, using a rotary closing or capping machine comprising a rotatable rotor and a plurality of closing or capping devices disposed around a perimeter of said rotor, said method comprising the steps of:

forming an inert gas atmosphere in a chamber of said rotary closing or capping machine, which inert gas atmosphere comprises an inert gas which is essentially inert with respect to the oxygen-sensitive liquid, and which chamber being an annular chamber disposed around said perimeter of said rotor, which annular chamber comprising a plurality of wall elements essentially enclosing the entirety of an interior chamber space;

said step of forming an inert gas atmosphere in said chamber comprising flowing inert gas in a laminar flow;

rotating said rotor around its vertical machine axis, and thereby moving at least a top, circular, ring-shaped wall element, being connected to or forming part of said rotor, around said vertical machine axis;

positioning solely a mouth or mouth portion of each of the containers within said interior chamber space in said chamber and thus in said inert gas atmosphere, while positioning a body portion of each of the containers outside of said interior chamber space; and

activating closing or capping devices of said rotary closing or capping machine and applying closures or caps to the mouths or mouth portions in said inert gas atmosphere in said chamber.

2. The method according to claim 1 , wherein said step of forming an inert gas atmosphere in said chamber comprises conducting at least one of: CO 2 , CO 2 gas, and nitrogen into said chamber, and forming said inert gas atmosphere which has an oxygen content less than 20%.

3. The method according to claim 1 , wherein said method further comprises gassing, at least once, the portion of each container not containing an oxygen-sensitive liquid, by emitting a jet of an inert gas from a nozzle arrangement into the mouth of each container prior to capping or closing, which gassing is performed in said chamber in said inert gas atmosphere.

4. The method according to claim 1 , wherein:

said method further comprises flowing an inert gas over the closures or caps during and/or before their installation on the containers;

said step of forming said inert gas atmosphere comprises forming said inert gas atmosphere which has an oxygen content less than 5%;

during closing or capping, flowing inert gas at least in the area of the mouths or mouth portions; and

said method further comprises filling the containers in a normal atmosphere prior to closing or capping.

5. The method according to claim 1 , wherein:

said wall elements comprise:

an upper wall disposed substantially perpendicular to said vertical machine axis;

a lower wall disposed opposite said upper wall and substantially perpendicular to said vertical machine axis;

an outer wall disposed transverse to said upper and lower walls; and

an inner wall disposed opposite to said outer wall and transverse to said upper and lower walls, which inner wall is radially closer to said vertical machine axis than said outer wall and is surrounded by said outer wall;

at least one of said walls is mounted on said rotor to move with said rotor, and at least one other of said walls is not mounted on said rotor and is stationary with respect to said at least one of said walls mounted on said rotor; and

said step of rotating said rotor comprises moving said at least one of said walls mounted on said rotor with respect to said at least one other of said walls not mounted on said rotor.

6. The method according to claim 5 , wherein said step of forming an inert gas atmosphere in said chamber comprises conducting at least one of: CO 2 , CO 2 gas, and nitrogen into said chamber, and forming said inert gas atmosphere which has an oxygen content less than 20%.

7. The method according to claim 6 , wherein said method further comprises gassing, at least once, the portion of each container not containing an oxygen-sensitive liquid, by emitting a jet of an inert gas from a nozzle arrangement into the mouth of each container prior to capping or closing, which gassing is performed in said chamber in said inert gas atmosphere.

8. The method according to claim 7 , wherein:

said method further comprises flowing an inert gas over the closures or caps during and/or before their installation on the containers;

said step of forming said inert gas atmosphere comprises forming said inert gas atmosphere which has an oxygen content less than 5%;

during closing or capping, flowing inert gas at least in the area of the mouths or mouth portions; and

said method further comprises filling the containers in a normal atmosphere prior to closing or capping.

9. A rotary closing or capping machine for closing or capping containers comprising bottles, cans or similar containers containing an oxygen-sensitive liquid, said rotary closing or capping machine comprising:

a rotor being rotatable around a vertical machine axis;

a chamber to contain an inert gas, which is essentially inert with respect to an oxygen-sensitive liquid in containers to be closed or capped, in an amount sufficient to form an inert gas atmosphere therein;

said chamber being an annular chamber disposed around a perimeter of said rotor;

said chamber comprising a plurality of wall elements that essentially enclose the entirety of an interior chamber space;

at least a top, circular, ring-shaped wall element being connected to or forming part of said rotor and being movable by said rotor, and at least one other of said wall elements being separate from said rotor and being stationary with respect to said at least one of said wall elements movable by said rotor;

a plurality of container handling devices to position solely mouths or mouth portions of containers within said interior chamber space in said chamber and thus in the inert gas atmosphere, and position body portions of the containers outside of said interior chamber space; and

a plurality of closing or capping stations to apply closures or caps to mouths or mouth portions of containers in the inert gas atmosphere in said chamber, which closing or capping stations are disposed around the perimeter of said rotor.

10. The rotary closing or capping machine according to claim 9 , wherein:

each of said closing or capping stations comprises a closure or cap handling structure to handle closures or caps; and

said closure or cap handling structures are disposed within said chamber.

11. The rotary closing or capping machine according to claim 9 , wherein:

said container handling devices are disposed outside of said chamber; and

said rotary closing or capping machine comprises connections to deliver inert gas into said chamber, and outlets to discharge inert gas out of said chamber.

12. The rotary closing or capping machine according to claim 9 , wherein:

said rotary closing or capping machine comprises a perforated partition disposed in said chamber and to divide said chamber into two sub-chambers; and

said perforated partition produces a laminar or essentially laminar inert gas flow in said chamber in a flow direction toward the mouths or mouth portions from the top to the bottom of said chamber or essentially from the top to the bottom of said chamber.

13. The rotary closing or capping machine according to claim 9 , wherein:

said rotary closing or capping machine comprises at least one nozzle, disposed in said chamber, to emit a jet of an inert gas into each mouth in said inert gas atmosphere to gas, at least once, the portion of each container not containing an oxygen-sensitive liquid, prior to closing or capping; and

said rotary closing or capping machine is in combination with a filling machine to fill containers under a normal atmosphere prior to closing or capping.

14. The rotary closing or capping machine according to claim 9 , wherein:

said wall elements comprise:

an upper wall disposed substantially perpendicular to said vertical machine axis;

a lower wall disposed opposite said upper wall and substantially perpendicular to said vertical machine axis;

an outer wall disposed transverse to said upper and lower walls; and

an inner wall disposed opposite to said outer wall and transverse to said upper and lower walls, which inner wall is radially closer to said vertical machine axis than said outer wall and is surrounded by said outer wall.

15. The rotary closing or capping machine according to claim 14 , wherein:

said at least one of said walls mounted on said rotor comprises said inner wall and said lower wall;

said lower wall is in the shape of a disc that extends radially, with respect to said vertical machine axis, to a position adjacent a lower edge of said outer wall;

said outer wall extends from a perimeter edge of said upper wall to a perimeter edge of said lower wall;

each of said closing or capping stations comprises a closure or cap handling structure to handle closures or caps; and

said closure or cap handling structures are disposed within said chamber.

16. The rotary closing or capping machine according to claim 15 , wherein:

said container handling devices are disposed outside of said chamber; and

said rotary closing or capping machine comprises connections to deliver inert gas into said chamber, and outlets to discharge inert gas out of said chamber.

17. The rotary closing or capping machine according to claim 16 , wherein:

said rotary closing or capping machine comprises a perforated partition disposed in said chamber and to divide said chamber into two sub-chambers; and

said perforated partition produces a laminar or essentially laminar inert gas flow in said chamber in a flow direction toward the mouths or mouth portions from the top to the bottom of said chamber or essentially from the top to the bottom of said chamber.

18. The rotary closing or capping machine according to claim 17 , wherein:

said rotary closing or capping machine comprises at least one nozzle disposed in said chamber and to emit a jet of an inert gas into each mouth in said inert gas atmosphere to gas, at least once, the portion of each container not containing an oxygen-sensitive liquid, prior to closing or capping; and

said rotary closing or capping machine is in combination with a filling machine to fill containers under a normal atmosphere prior to closing or capping.