Tobacco processing system

1. A tobacco processing system for processing tobacco, which processing system comprises;

a tobacco mixing device for mixing an additive in the tobacco,

a tobacco supplier for supplying the tobacco to the mixing device, and

an additive supplier for supplying the additive to the mixing device,

wherein the mixing device comprises a mixing housing which encloses the tobacco and additive to form a mixing chamber in which the tobacco and additive are mixed and a gas stream unit which is operatively connected to the mixing housing and configured to provide a gas stream which moves the tobacco and additive through the mixing chamber,

wherein the mixing housing is formed by a holding member for holding the tobacco and a closing member placed in a closing positing in which the tobacco is enclosed by the holding member and the closing member,

wherein the processing system comprises a dosing device for forming doses of tobacco and a transport device for transporting the doses of tobacco in tobacco holders through at least part of the processing system and the holding member is formed by one of the tobacco holders,

wherein the mixing device is configured to provide the gas stream in the mixing chamber while the closing member is located in the closing position and the closing member is moved along with the tobacco holder, and

wherein the mixing device comprises a member mover to place the closing member in the closing position on one of the moving tobacco holders while moving the closing member along with the tobacco holder over a predetermined distance.

2. The tobacco processing system according to claim 1 , wherein the mixing device is configured to lift the tobacco inside the mixing chamber via the gas stream.

3. The tobacco processing system according to claim 1 , wherein the gas stream unit comprises a controller to control the gas stream in the mixing chamber such that a pulsating gas stream is provided and the pulsating gas stream has between 2 and 5 gas stream pulses per second.

4. The tobacco processing system according to claim 1 , wherein the mixing housing comprises at least one gas opening which is operatively connected with the gas stream unit.

5. The tobacco processing system according to claim 1 , wherein;

the mixing housing comprises at least one further gas opening which is operatively connected to the gas stream unit and positioned to provide a further gas stream in a direction transverse to the gas stream,

the gas steam unit comprises a further controller which is configured to control the further gas stream in the mixing chamber such that a pulsating further gas stream is provided, and

the pulsating further gas stream has between 5 and 15 gas stream pulses per second.

6. The tobacco processing system according to claim 1 , wherein the holding member comprise a first inner space wherein the tobacco is positioned, the closing member comprises a second inner space, the mixing chamber is formed by the first inner space and second inner space and the mixing device is configured to lift the tobacco from the first inner space into the second inner space via the gas stream.

7. The tobacco processing system according to claim 1 , wherein;

the member mover moves the closing member along an endless path in which, after being moved along with the tobacco holder while being in the closing position, the closing member is moved back in the opposite direction of the movement of the tobacco holders while being located at a distance from the tobacco holders in order to be placed in the closing position on a further one of the tobacco holders and to repeat the cycle, and

the mixing device comprises multiple closing members and the member mover is configured to move the closing members synchronously in the same direction such that the closing members together with several of the tobacco holders form multiple mixing chambers.

8. The tobacco processing system according to claim 1 , wherein the transport device is a tray transporter and the tobacco holders are trays moved by the tray transporter through at least part of the processing system.

9. The tobacco processing system according to claim 1 , wherein;

the transport device is a package transporter and the tobacco holders are tobacco packages moved by the package transporter through at least part of the processing system,

the tobacco packages are tobacco bins, and

the tobacco bin comprises a bin wall defining a bin opening and the closing member in the closing position is placed on or in the bin opening.

10. The tobacco processing system according to claim 1 , wherein the additive supplier is configured to add the additive to the tobacco when the tobacco is located in the mixing chamber.

11. The tobacco processing system according to claim 1 ,

wherein the additive supplier is configured to supply the additive into the tobacco storage, and

wherein the holder member is formed by the tobacco storage.

12. A method of processing tobacco, which method comprises the steps of;

providing a tobacco processing system according to claim 1 ,

supplying tobacco into the mixing chamber of the mixing device,

supplying an additive into the mixing chamber of the mixing device, and

providing a gas stream in the mixing chamber with the gas stream unit to move the tobacco and the additive through the mixing chamber.

13. The method according to claim 12 , wherein the tobacco is lifted inside the mixing chamber via the gas stream.

14. The method according to claim 12 , wherein the method comprises enclosing the tobacco with the mixing housing formed by the holding member for holding the tobacco and the closing member placed in a closing position in contact with the holding member to enclose the tobacco.

15. The method according to claim 14 , wherein the method comprises transporting doses of tobacco in the tobacco holders through at least part of the processing system with the transport device and forming the holder member with one of the tobacco holders.

16. The method according to claim 15 , wherein the transport device is a tray transporter and the tobacco holders are trays moved by the tray transporter through at least part of the processing system and the method comprises mixing the tobacco and additive while one of the trays forms the holder member.

17. The method according to claim 15 , wherein the transport device is a package transporter and the tobacco holders are tobacco packages moved by the package transporter through at least part of the processing system and the method comprises mixing the tobacco and additive while one of the tobacco packages forms the holder member.