Patent ID: 7569243

Claim:
A method of preparing a food product from a cartridge, the method comprising: providing a cartridge having one of first and second dimensions, the second dimensions being larger than the first dimensions, and being held in a percolating chamber defined by a percolating assembly comprising a holding portion and a percolating head, the percolating head capable of arrangement in one of a first closed position with respect to the holding portion for containing a cartridge having the first dimensions and a second closed position with respect to the holding portion for containing a cartridge having the second dimensions, the percolating head in the first closed position being in fluid-tight association against a loading member and the percolating head in the second closed position being in fluid-tight association against the cartridge, the percolating head also capable of being locked in the percolating chamber in one of the first closed position and the second closed position; closing the percolating assembly in one of the first and second closed positions by bringing the percolating head into fluid-tight association in the first closed position against the loading member and bringing the percolating head into fluid-tight association in the second closed position against the cartridge; feeding a fluid into the cartridge; and outletting a mixture of the fluid and a substance from the cartridge to prepare a food product.