| 摘要 |
<p>1. A filter cone (10), in particular for the infusion of coffee, being flat with a generally trapezoidal shape having a bottom edge (12), two divergent rectilinear lateral edges (14 and 16), and an opening edge (18), this cone being formed by cutting out from a band of filter paper (20) folded along its median longitudinal axis (22) to obtain two superimposed leaves (24 and 26), one of the said lateral edges (14) of the cone being formed by the said median fold (22) and the said cutting out being performed on the remaining part of the said shape to form the two opposite walls (28 and 30) of the said cone in the two said leaves (24 and 26) respectively, these walls in addition being united to one another by a joining border (32) extending along the other lateral edge (16) and along the bottom edge (12), characterized in that the bottom edge (12), in its region adjacent to the said other lateral edge (16), has a curvilinear shape the concavity of which is turned towards the opening edge (18).</p> |
