Patent ID: 8685479

Claim:
A capsule for delivering a food product by injecting a fluid under pressure into the capsule when the capsule is inserted into a receptacle of a food preparation machine, the capsule comprising a chamber defined by capsule side walls, a flexible bottom wall, the chamber containing at least one ingredient to be dissolved and/or extracted by the injection fluid, and a beverage dispensing structure comprising at least one dispensing opening located through the bottom wall, the beverage dispensing structure also comprises a pressure retaining element adapted to retain a certain predetermined dissolution and/or extraction pressure in the chamber for the mixing of the injection fluid with the ingredient and located in the vicinity of the bottom wall, outside of the chamber, the pressure retaining element comprising at least one protrusion located in correspondence to the at least one dispensing opening so that the protrusion is located in the corresponding opening and restricts its section, at least at the time injection fluid inside the capsule chamber presses onto the flexible bottom wall and moves the flexible bottom wall towards the pressure retaining element.