PROCESS FOR THE EXTRACTION OF OPEN CARTRIDGES OF COFFEE, A COFFEE CARTRIDGE AND AN EXTRACTION DEVICE FOR CARRYING OUT THE PROCESS

摘要

A process for the extraction of an open cartridge (1) containing roasted and ground coffee, the cartridge (1) comprising an upper face provided with a circular bead (5) and a lower face provided with a filter, in which a mixture of water and air is injected under pressure by an injector (7) which is surrounded by a sealing surface (10) and which pierces the upper face of the cartridge, imperviousness during extraction being established by compression of the circular bead (5) of the cartridge against the sealing surface (10) surrounding the injector (7), the mixture of water and air being injected within the cartridge (1) a few millimetres below the upper surface thereof and in an ascending direction.