Coffee filters are conical in shape and have folded edge and edge which is sealed together by embossing, filters being folded about their center line and packed in groups, one of which is upside-down

摘要

The coffee filters are conical in shape and have a folded edge (6) and an edge (6a) which is sealed together by embossing. The filters are folded about their center line and packed in groups (4, 4a), one of which is upside-down. Alternatively they are made as a continuous strip which is folded concertina-fashion.