Cylindrical filter has embossed angled fold lines in the filter material, to be rolled and compressed into folds with angled edges

摘要

For the production of a cylindrical filter (1), using a natural and/or synthetic paper or similar filter material, a folding pattern is embossed in the flat filter material web (2) with folding lines at an angle to the longitudinal axis (4) of the filter. The web is rolled together, cut to the required length and then compressed into folds (3) with angled edges.