Capsule with optimized weakened material region and system for preparing edible products including said capsules

A capsule (1) for preparing an edible product on a brewing device (10), said capsule having an axial axis (X) defining an axial direction and being round in cross section to said axial axis (X), the capsule comprising:

• a first construction element (2) configured as a container with a side wall, a closed bottom wall and an open top, and comprising an interior collection volume for holding a single portion of an edible substance, and
• a second construction element (3) configured as a lid that is structured to sealingly cover said open top and thereby confine said interior collection volume of said first construction element (2), and to provide an entry flow passageway to the interior collection volume of said first construction element (2),
• wherein said second construction element (3) comprises a flow entry wall part (31) that has a disk shape with an upstream surface, a downstream surface, and a prevailing wall thickness (e31) between two planes that are on a respective one of the upstream and downstream surfaces and are transverse to the axial axis (X) of said capsule (1) when covering the open top of the first construction element (2),
• wherein said flow entry wall part (31) comprises a rigid material and has a passageway provided with a circular shape, a passageway bottom wall (4) having an upstream oriented side and a downstream oriented side in the axial direction, and a passageway side wall disposed centered relative to the axial axis (X) of said capsule (1),
• wherein said passageway bottom wall (4) comprises a weakened material region (41) formed circumferentially within said passageway bottom wall (4) and adapted to break under a given upstream flow pressure,
• wherein said weakened material region (41) corresponds to a region between a first recess provided on the upstream oriented side of said passageway bottom wall (4), and a second recess provided on the downstream oriented side of said passageway bottom wall (4), and
• wherein each one of said recesses is formed circumferentially along a transversal direction from said axial axis (X) and extends into said passageway bottom wall (4) in said axial direction so that a distance between said recesses, in the nearest region between themselves, is a value corresponding to a weakened thickness (e41).