EXCHANGEABLE SUPPLY PACK FOR A BEVERAGE DISPENSING MACHINE, DOSER, PUMP ASSEMBLY AND METHOD OF MANUFACTURING

An exchangeable supply pack for a beverage dispensing machine. The pack comprises a doser including a pump assembly comprising a pump channel between an inlet and an outlet, for receiving a fluid from an ingredient container and for pumping it to the outlet. The pump assembly comprises a pump chamber and at least two engaging gears forming a gear pump. At least one of said gears forms a driving gear and comprises a shaft opening for receiving a driving axle of the beverage dispensing machine. The shaft opening coincides with an axle reception opening of a support wall of the pump chamber, and a flexible seal is arranged at least between the driving gear and the support wall. The seal comprises a through opening coinciding with the shaft opening and the axle reception opening for receiving the driving axle.