Patent ID: 8047126

Claim:
A dispensing group for the preparation of a beverage from a soluble product of the type comprising a disposable cartridge containing the soluble product, said cartridge comprising at least one outlet for the delivery of a beverage comprised of said soluble product and a fluid, wherein said at least one outlet opening is defined by at least one breaking line present on a wall of said cartridge, said group further comprising a collecting device having a seat suitable to receive said disposable cartridge and wherein said collecting device comprises at least one piercing element having a substantially cylindrical engagement portion to pierce said cartridge in correspondence to said breaking line and to fully enter the cartridge so that an exterior side surface of the cylindrical engagement portion fully engages said outlet opening completely prior to dispensing a beverage, the dispensing group further comprising a regulator arrangement for the delivery of said beverage, the regulator arrangement comprising at least one delivery port that is positioned during beverage dispensing between the piercing element and an edge of said outlet opening and extends substantially around the perimeter of the cylindrical engagement portion of said piercing element, wherein to obtain said at least one delivery port, the ratio R between the diameter D 2 of the engagement portion of said piercing member and the diameter D 1 of said outlet opening is 1≦R≦1.067.