FILTRE A CIGARETTE AMELIORE

FILTRE A CIGARETTE 10 COMPORTANT UN BOUDIN FILTRANT POREUX 12 AU CENTRE DUQUEL S'ETEND UN PASSAGE DE FUMEE CAPILLAIRE 16 ET UN EMBOUT CREUX CYLINDRIQUE 20 COAXIAL AU BOUDIN FILTRANT A L'EXTREMITE COTE BOUCHE DE CELUI-CI. LE BOUDIN FILTRANT 12 EST ENTOURE PAR UNE ENVELOPPE NON POREUSE 14 ET DES RAINURES 18 S'ETENDENT DE L'EXTREMITE COTE BOUCHE DU BOUDIN FILTRANT SUR UNE DISTANCE CHOISIE INFERIEURE A LA LONGUEUR DU BOUDIN. L'EMBOUT 20 COMPORTE DES CONDUITS D'AIR 26 COMMUNIQUANT AVEC LES RAINURES 18 ET DES CONDUITS DE FUMEE 28 COMMUNIQUANT AVEC LA ZONE DU BOUDIN FILTRANT SITUEE ENTRE DES RAINURES ADJACENTES 18. UNE MANCHETTE ENTOURE LE BOUDIN FILTRANT ET L'EMBOUT ET COMPORTE DES PERFORATIONS COMMUNIQUANT AVEC LES RAINURES. A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough and a hollow, generally cylindrical mouthpiece coaxially located with the filter rod at the mouth end of the filter rod. The filter rod is circumscribed by a non-porous wrapper, and the filter rod with the non-porous wrapper therearound is provided with grooves extending from the mouth end thereof a preselected distance longitudinally therealong. The mouthpiece is formed with air flow channels in flow communication with the grooves of the filter rod, and smoke flow channels in flow communication with that area of the filter rod mouth end between adjacent grooves of the filter rod. Tipping material circumscribes the filter rod and the mouthpiece, and is provided with flow-through openings therein in flow communication with the grooves.