摘要 |
A grinding unit, a cartridge for the grinding unit and use of same for grinding coffee beans. A grinding unit (1) comprises a ring burr (2) and a frustoconical burr (3) that together delimit a grinding gap (30) therebetween. A first angle &thetas; between a first subset of curved teeth (20a) of the frustoconical burr (3) and the first curved teeth of the ring burr (2) provides a grinding gap (30) having an angle smaller than a second angle &phis; between a second subset of curved teeth (20b) of the frustoconical burr (3) and the first curved teeth of the ring burr (2). A geometrical outline (P) taken through the cusps (21;22) of the second curved teeth (20a,20b) at the top end face (17a;52a) of the frustoconical burr (3;50) opposite the base (16) is substantially a square or a rectangle. This grinding unit produces a resulting grinded product, such as grinded coffee beans, with fewer turns than known grinding units and at less effort. The properties and qualities of the resulting grinded products are superior to grinded products obtained with conventional grinding units. In case that coffee is grinded substantially no flavour and aroma are lost by grinding. A cartridge for the grinding units is also provided. Fig. 1 |