Beverage machine with adjustable sealing device

A combination of a machine for handling a flavouring ingredient and preparing a beverage therefrom and serving said beverage via a dispensing outlet to a consumer receptacle by mixing water from a water source including a mixing unit that comprises:

• a support that is stationary during said handling of said flavouring ingredient;
• a seat configured to receive said flavouring ingredient unwrapped before mixing with said water;
• a closure part configured to close and open the ingredient opening;
• a wall part that is movable inside the seat,
• the seat, the closure part and the wall part being:
• directly or indirectly mounted to the support;
• and
• relatively movable between:
• a transfer configuration for supplying said flavouring ingredient into the seat and removing such ingredient upon beverage preparation;
• and a mixing chamber configuration in which the seat and the closure part and the wall part form a mixing chamber fluidically connected with the water source,
• during beverage preparation, said flavouring ingredient being mixed with said water in the mixing chamber to form said beverage prior to serving thereof via the dispensing outlet,
• the closure part comprises a closure holder and a peripheral sealing member displaceably mounted on the holder and urged away from the holder against the seat and a flavouring ingredient for preparing said beverage in the machine.