SEALED CAPSULE FOR PREPARING A DRINK, INCLUDING COFFEE

摘要

1. An airtight capsule (1) for preparing a beverage, in particular coffee, by supplying a pressurized medium, comprising: a cup-shaped body (2) having a substantially flat upper flange (2a), radially protruding outward, a side wall (2b) and a flexible lower wall (2c), a flexible cover (3) welded to the flange (2a) of the bowl-shaped body (2) to form a sealed chamber (4) containing a portion of granular material (5), in particular, roasted ground coffee, for preparing a drink, in particular espresso coffee; while granular m The material (5) is pre-compressed in the aforementioned chamber (4) in a direction perpendicular to the plane containing the aforementioned flange (2a) to form a dense compressed portion of the aforementioned material, and a vacuum is created in the aforementioned chamber (4) to such an extent that the lid (3 ) has moved to the upper surface of the above section and, at least, has the property of attaching to the upper surface of the above section; between the flange (2a) and the lower wall (2c), the side wall (2b) of the cup-shaped housing (2) has an annular step (2f), which provides a local reduction in the cross section of the above chamber (4) in the direction of the lower wall (2c); sealed capsule, characterized in that: the bottom wall (2c) of the cup-shaped body (2) is capable of deformation under the action of the medium supplied to the capsule (1), shifted away from the lid (3), and that: the above step (2f) is closer to the bottom to the wall (2c) of the cup-shaped body (2) than to the flange (2a), and provides a month a significant decrease in the cross section of the aforementioned chamber (4) by at least 25% .2. The capsule according to claim 1, in which the aforementioned stage (2f) provides a local reduction of the cross section