Patent ID: 7412921

Claim:
A capsule for preparation of a liquid food product, comprising: a capsule chamber containing a soluble or suspendable food ingredient; an inlet portion associable with a liquid supply for feeding a liquid into the capsule chamber for providing a liquid mixture of the liquid and food ingredient; an outlet wall closing the capsule chamber; and an openable portion disposed in the outlet wall configured for opening to an open configuration when depressed inwardly by an opening member of an extraction chamber when the cartridge is disposed in the extraction chamber of a device for producing an aqueous food product by flowing water through the capsule chamber to mix with the food ingredient to form a liquid mixture, wherein the openable portion in the open configuration is configured for releasing the liquid mixture from the capsule, the outlet wall is supportively associated with the openable portion for keeping the openable portion closed in response to internal pressure within the capsule chamber, and wherein the outlet wall defines an opening which is closed by the openable portion and has a first cross-section; and the openable portion has a second cross-section aligned with and larger than the first cross-section to restrict the openable portion from opening outwardly from the capsule chamber.