| 摘要 |
The system comprises a capsule (1) which has first and second end walls (3, 2f) and an annular side wall (2e) and which contains a dose of a substance for preparation of the beverage, and a machine (M) comprising an infusion assembly (G) designed to receive a capsule (1) and having an inlet (30, 31) for supplying a flow of pressurized water to be introduced into the capsule (1), and a delivery outlet (14) for outflow of the beverage formed in the infusion assembly (G) towards a collecting container. The infusion assembly (G) includes a plurality of parts (10-12) which can be moved away from and towards each other and can be sealingly coupled together so as to define as a whole an infusion chamber into which the capsule (1) can be introduced. In at least one (11) of these parts (10-12) of the infusion assembly (G) there is provided a perforation device (21; 121) designed to perforate the capsule (1) arranged in the infusion chamber (20, 22). The infusion chamber (20, 22) is able to define, with respect to a capsule (1) positioned there, an annular interspace (20, 22) in which a transversely protruding portion (2b; 2h) of the side wall of the capsule (1) extends and which can be connected to the supply water inlet (30, 31) and is separated in a liquid-tight manner from the delivery outlet (14). The perforation device comprises an annular perforation member (21; 121) which, in the closed condition of the infusion chamber (20, 22), extends into the interspace (20, 22) and is designed to cause a tear in the protruding portion (2b; 2h) of the wall of the capsule (1) contained inside the chamber (20, 22), such that a flow of pressurized water can be introduced into the capsule (1) through the interspace or gap (20, 22) and said tear. |
