Method and device for preparing a hot beverage

A system for preparing a liquid food, comprising:

• a containment portion configured for receiving a capsule that contains a food ingredient and for receiving a liquid supplied to flow therethrough in contact with the food ingredient to produce a liquid-food mixture, the containment portion comprising an extraction chamber of a food preparation device;
• a boundary wall having a wall surface extending along a peripheral portion of the containment portion, wherein the boundary wall comprises a bulged portion, the bulged portion being configured for deforming a wall of the capsule into the capsule for supporting the wall that is disposed thereagainst to reduce or prevent rupture thereof when the capsule is pressurized with liquid;
• at least one elongated channel extending along the wall surface and disposed downstream of the containment portion;
• a liquid feeder configured for feeding liquid into the capsule in the extraction chamber;
• and
• an outlet is connected with the extraction chamber downstream of the channel, wherein the channel is configured for receiving the liquid mixture and directing the liquid mixture to the outlet for providing the mixture as a liquid food, the outlet being configured for delivering the liquid food product.

A system for preparing a liquid food product, comprising:

• an extraction chamber comprising the outlet;
• a capsule receivable in the extraction chamber, wherein the extraction chamber is configured for feeding a liquid into the capsule, the capsule comprising;
• a containment portion configured containing a food ingredient and for receiving the liquid supplied to flow therethrough and in contact with the food ingredient to produce a liquid-food mixture,
• an outlet wall closing the containment portion, and
• an openable portion disposed in the outlet wall having a weakened portion configured for allowing the openable portion to open to an open configuration when the openable portion is depressed inwardly, the openable portion in the open configuration being configured for releasing the liquid-food mixture from the capsule;
• and
• an opening member protruding towards the extraction chamber and configured and disposed for depressing the openable portion for fluidly communicating the liquid-food mixture with the outlet;
• wherein the containment portion and outlet wall are configured and associated for displacing the openable potion against the opening member in response to increased internal fluid pressure for opening the openable portion.

A device for preparing a liquid food product, comprising:

• an extraction chamber configured for receiving a capsule that contains a food ingredient;
• a liquid feeder configured for feeding liquid into the capsule in the extraction chamber;
• an outlet connected with the extraction chamber and configured for delivering the liquid food product;
• a supportive wall associable with a capsule wall of the capsule for supporting the capsule wall during pressurization of the capsule with the liquid;
• an opening member disposed within the contour of the supportive wall and being configured for producing an opening in the capsule when the capsule is pressurized;
• and
• at least one elongated channel extending along the supportive wall and disposed downstream of the containment portion for receiving the liquid mixture and directing the liquid mixture to an outlet for providing the mixture as a liquid food;
• wherein the channel has a cross section configured to create shear stress in the flow of the liquid mixture sufficient to create foam in the liquid food.