Capsule for the preparation of coffee extract having a structure facilitating perforation for injection of water

Abstract

The invention relates to a capsule for the preparation of coffee extract having a structure facilitating perforation for injection of water. The capsule for the preparation of a coffee extract from coffee contained therein and hot water injected under pressure in the capsule by a water injection device. The capsule has a frusto-conical body with a rim, sidewall, and an inlet wall and a lower delivery wall sealed to the rim and contains a predosed amount of coffee. The inlet wall may have a flat or convex portion and a structure in relief or in recess arranged for facilitating penetration of blades belonging to the injection device and extending on a substantially circular path of predetermined radius R1 equal to the radius R2 of the circular path along which the blades of the injection device extend.

Description

technical field [0001] The present invention relates to a capsule for preparing coffee extract from coffee contained in the capsule by injecting hot water under pressure into the capsule using a water injection device having a perforated blade. The invention also relates to a capsule system comprising a capsule according to the invention associated with a water injection device in a beverage production device. Background technique [0002] The background of the invention is the field of capsules containing beverages or other food ingredients. By the interaction of these ingredients with the liquid, beverages such as coffee, tea or other foods such as soup can be produced. The interaction may be based on the principle of extraction, mixing or dissolution of beverage substances with a liquid diluent such as water. [0003] The capsule of the invention is particularly suitable for containing ground coffee for the production of a coffee beverage by injecting hot water under pr...

AI Technical Summary

Problems solved by technology

However, known embodiments have the disadvantage that certain capsules made of more elastic materials such as polymers are difficult to puncture in a repeated manner, so that the size and geometry of the resulting perforations are not well defined

Especially capsules with plastic walls or biodegradable polymers, these materials are more difficult to pierce and the piercing member of the device will blunt faster

Therefore, the new capsules cannot be pierced correctly, for example, the capsules are partially or insufficiently pierced, which makes the flow distribution of the liquid inside the capsules unsatisfactory, thus affecting the quality of the extract

The beverage preparation device must also be returned to a repair or maintenance station in order to repair or replace damaged piercing members

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