Funnel-shaped filter insert, e.g. for coffee machine

摘要

The opening angle of the section (2) in the upper area (9) is enlarged in relation to the lower area. The seam (5) in the upper area on the inner side of the filter insert is reduced in its width. The seam in the upper area is bent outwards. The seam in the upper area reaches as far as the intersection edges (7) of the side edges. The insert comprises a section (2) which is folded (1) and has the basic shape of a trapezium. On its upper edge it has arc-shaped intersection edges (3). The more strongly loaded embossed seam (4) on the base has a somewhat larger width than the embossed seam (5) on the side edge.