Verfahren und Vorrichtung zur Herstellung einer insbesondere fuer Zigarettenfilter geeigneten Faserbahn

摘要

Improved aerosol filters, particularly cigarette filters, are prepared by imparting a patterned surface, preferably a plurality of longitudinal grooves, to a web of a synthetic thermoplastic fibrous material, preferably a tow of longitudinally aligned crimped continuous cellulose acetate filaments, and forming the resultant patterned web into a filter of the desired form.