Sistema de extracción para la producción de una bebida utilizando una cápsula

The system has a drinks preparing device comprising a chamber portion (14) with a cavity of shape adapted to cover a body of a capsule (1), and another chamber portion with an extraction plate. One of the portions is movable relative to the other portion from an open position in which the capsule is inserted to a closed position in which the capsule is enclosed between the portions. The former portion has hooks (32, 38) to keep the capsule in the cavity during transition from the closed position to the open position. The capsule has complementary units gripped by the hooks. The complementary units are formed of a free edge (8) of a collar and a truncated cone shaped wall (39) of the capsule, where a portion of the wall is made of aluminum, plastic or starch based material.