Process for the production of a container for the preparation of a beverage in a beverage preparation device and a container obtained by said process

A process for producing a container for the preparation of a beverage in a beverage preparation device, comprising the steps of:

• a. providing an injection wall of said container, comprising a paper layer through which water is to be introduced in the container, wherein said injection wall is able to be punctured by an injection member of the beverage preparation device for circulating water under pressure inside said container,
• b. providing a beverage delivery wall of said container, comprising a paper layer through which the beverage is to be dispensed out of the container, wherein said delivery wall is able to be opened by an opening member of the beverage preparation device, wherein at least one of said injection and delivery walls has a cup shape,
• c. placing a beverage ingredient in said at least one cup shaped wall, wherein said beverage ingredient is a body formed by a compacted beverage ingredient,
• d. sealing together edge portions of said injection and delivery walls in a sealing station, such as to form a chamber in which said body formed by a compacted beverage ingredient is stored,
• wherein said sealing station comprises a housing element for housing at least partially said injection and/or delivery walls and wherein said housing element at the beginning of the sealing has a housing temperature (Th), and wherein said body is shaped and dimensioned such as not to completely fill said chamber;
• after the sealing step, the container is cooled at a cooling temperature (Tc), being either:
• at least 15° C. lower than the temperature of the housing, or
• comprised between −10° C. and +25° C.,
• to reduce the space not filled by the body in the chamber and to increase the area of the internal surface of at least the delivery wall which adheres to the body of the compacted beverage ingredient.