Closed capsule with opening means

A method of preparing a beverage from a capsule containing a beverage substance in a closed chamber, the method comprising:

• providing a capsule comprising a single, unitary device including several elements comprising
• a chamber containing the beverage substance, the chamber being closed prior to an injection of a fluid into the chamber, wherein the substance is in contact with at least a portion of an outer periphery of the capsule prior to the injection of the fluid into the chamber,
• a first puncturable wall of the chamber for allowing the fluid to be injected into the chamber, wherein the first puncturable wall comprises at least a portion of an outer periphery of the capsule and wherein the first puncturable wall is welded to a remaining portion of the outer periphery of the capsule,
• a second puncturable wall forming a retaining wall for the substance, and
• an opening device comprising at least one puncturing element, wherein the opening device is contained within the outer periphery of the capsule;
• and introducing the fluid under pressure into the capsule to form a beverage, wherein once the pressure inside the capsule reaches a certain level, the opening device is activated to open the capsule and release the beverage.

A capsule containing a substance for the preparation of a beverage that is designed to be extracted by injection of a fluid under pressure, the capsule comprising a single, unitary device including several elements comprising:

• a chamber containing the substance, the chamber being closed prior to an injection of the fluid into the chamber, wherein the substance is in contact with at least a portion of an outer periphery of the capsule prior to the injection of the fluid into the chamber;
• a first puncturable wall of the chamber for allowing the fluid to be injected into the chamber, wherein the first puncturable wall comprises at least a portion of the outer periphery of the capsule and wherein the first puncturable wall is welded to a remaining portion of the outer periphery of the capsule;
• a second puncturable wall forming a retaining wall for the substance;
• and
• an opening device comprising at least one puncturing element, wherein the opening device is contained within the outer periphery of the capsule, wherein the closed chamber comprises two welded half-shells and the opening device comprises a rod arranged between the shells, the rod comprising at least one opening for the entry of the fluid into the closed chamber and a pointed shape for puncturing the weld between the two shells, the pointed shape further comprising a filter.