| 摘要 |
A smoking article, such as a cigarette, includes, in one advantageous embodiment, a generally cylindrical, hollow tubular mouth section located in coaxial abutment to one end of the tobacco column of the cigarette. The wall of the mouth section is fabricated of an impermeable material. A plurality of grooves are formed in the periphery of the mouth section extending generally longitudinally thereof and being open to at least the mouth end of the mouth section. Air permeable tipping material circumferentially surrounds the mouth section and overlaps a portion of the tobacco column adjacent the mouth section. In a further embodiment of the present invention as discussed above, the tobacco column is two coaxially located tobacco sections with the tobacco section interfacing with the mouth section being of a different density than the other tobacco section. In yet a further embodiment of the present invention, the generally cylindrical, hollow tubular mouth section is formed with flow channels through the mouth section. Ventilation air openings are formed through the wall of the mouth section to provide for the flow of ventilating air into some of the flow channels. Air permeable tipping material circumferentially surrounds the mouth section and overlaps a portion of the tobacco column adjacent the mouth section, the grooves are organized into a plurality of groups, each group including a plurality of grooves to provide for the flow of ventilating air therethrough and through the ventilation air openings of the mouth section into the flow channels. |
