Capsule with sealing retention and system for preparing edible products based upon said capsules

A capsule (1) for preparing an edible product on a brewing device (10), and comprising:

• a first construction element (2) configured in a container-like form and adapted so as to provide a collection volume for a single portion of an edible substance, and
• a second construction element (3) configured in a circular lid-like form, and adapted so as to confine said collection volume of first construction element (2) and as to provide an entry flow passageway to the interior of said first construction element (2),
• whereby said second construction element (3) comprises a flow entry wall part (31) that presents a disk-like general with a prevailing wall thickness (e31) between two plane transversal relative to an axial axis (X) of said flow entry wall part (31),
• whereby said flow entry wall part (31) is provided in a rigid material,
• whereby said flow entry wall part (31) comprises a passageway wall (4) provided with a circular shape delimited by a first circumferential alignment and disposed centred relative to an axial axis (X) of said capsule (1),
• whereby said flow passageway wall (4) presents a weakened material region (41) that develops along at least most part of said first circumferential alignment and that is adapted so that breaks under a given upstream flow pressure, and
• whereby said flow entry wall part (31) presents a recess region (5) that develops in the upstream direction from the upstream oriented surface of said flow entry wall part (31),
• wherein said capsule (1) being characterized in that said recess region (5) develops from a second circumferential alignment in the proximity of said passageway wall (4) and so that defines an intercalary region (6) between said recess region (5) and said passageway wall (4), whereby said recess region (5) presents a recess wall thickness (e5) that is smaller than the prevailing wall thickness (e31), and bigger than the passageway wall thickness (e4) of said passageway wall (4), so that structurally reinforces the region surrounding said passageway wall (4) and provides retention surfaces for an engagement element (15) provided on said brewing device (10).