Beverage preparation machine

1. A beverage preparation machine comprising:

a housing;

a reservoir for containing a liquid;

a dispensing outlet for dispensing the liquid;

a pump situated between the reservoir and the dispensing outlet; and

a pump controller configured to operate the pump for conveying the liquid from the reservoir to the dispensing outlet for dispensing the liquid; and

the pump controller is configured to operate the pump based on a characteristic of a previous operation of the pump, the characteristic of the previous operation of the pump comprising a frequency of a plurality of previous operations of the pump.

2. The beverage preparation machine of claim 1 , wherein the characteristic of the previous operation of the pump further comprises a time that has elapsed since the previous operation of the pump.

3. The beverage preparation machine of claim 2 , wherein the characteristic of the previous operation of the pump further comprises a time that has elapsed between each of a plurality of previous operations of the pump.

4. The beverage preparation machine of claim 1 , wherein the pump controller is further configured to vary the time of operation of the pump based on the characteristic of the previous operation of the pump.

5. The beverage preparation machine of claim 1 , wherein the pump controller is further configured to vary the speed of operation of the pump based on the characteristic of the previous operation of the pump.

6. The beverage preparation machine of claim 1 , wherein the pump controller is further configured to vary an electrical parameter of the pump based on the characteristic of the previous operation of the pump.

7. The beverage preparation machine of claim 1 , wherein the pump controller is further configured to vary the power of operation of the pump based on a characteristic of the previous operation of the pump.

8. The beverage preparation machine of claim 1 , further comprising a package receiving means for receiving a beverage preparation package that contains beverage preparation ingredient, wherein the dispensing outlet is configured to dispense the liquid into the beverage preparation package when the beverage preparation package is present in the package receiving means.

9. The beverage preparation machine of claim 8 , further comprising a cup receiving station for receiving a beverage container, wherein the beverage preparation machine is configured so that the beverage container in the cup receiving station is capable of receiving a beverage from the beverage preparation package when the beverage preparation package is present in the package receiving means.

10. The beverage preparation machine of claim 1 , wherein the beverage preparation machine does not comprise a flowmeter for measuring the volume of liquid conveyed from the reservoir to the dispensing outlet.

11. The beverage preparation machine of claim 1 , wherein the pump controller is further configured to vary the speed of operation of the pump based on the characteristic of the previous operation of the pump.

12. A beverage preparation machine comprising:

a housing;

a reservoir for containing a liquid;

a dispensing outlet for dispensing the liquid;

a pump situated between the reservoir and the dispensing outlet; and

a pump controller configured to operate the pump for conveying the liquid from the reservoir to the dispensing outlet for dispensing the liquid; and

the pump controller is configured to operate the pump based on a characteristic of a previous operation of the pump, wherein the pump is a reciprocating positive displacement pump that comprises a shuttle mechanism.

13. The beverage preparation machine of claim 12 , wherein the reservoir is situated within the housing.

14. A method for operating a beverage preparation machine, the beverage preparation machine comprising:

a housing;

a reservoir for containing a liquid;

a dispensing outlet for dispensing the liquid;

a pump situated between the reservoir and the dispensing outlet; and

a pump controller configured to:

operate the pump for conveying the liquid from the reservoir to the dispensing outlet for dispensing the liquid; and

operate the pump based on a characteristic of a previous operation of the pump, the method comprising the steps of:

initiating one or more operations of the pump; and

initiating at least a further operation of the pump after a first time period;

wherein the further operation of the pump is based on a characteristic of the one or more operations of the pump, the characteristic of the one or more operations of the pump comprising a frequency of a plurality of the one or more operations of the pump.

15. The method of claim 14 , wherein when the first time period is less than a critical value, the further operation of the pump is different from the one or more operations of the pump.

16. The method of claim 15 , wherein the further operation of the pump is for a longer time than the one or more operations of the pump.

17. The method of claim 15 , wherein the further operation of the pump is at a higher speed than the one or more operations of the pump.

18. The method of claim 15 , wherein the further operation of the pump is at a higher power than the one or more operations of the pump.

19. The beverage preparation machine of claim 1 , wherein the reservoir is situated within the housing.

20. The method of claim 14 , wherein the reservoir is situated within the housing.