| 摘要 |
A mouthpiece adapted to be attached to a smoking article, such as a cigarette, includes, in one advantageous embodiment, an air impermeable core member of smaller diameter than the tobacco column to which it is to be coaxially located and a generally cylindrically shaped hollow sleeve having generally the same diameter as the tobacco column concentrically located over the impermeable core member and cooperating therewith to define a generally annular channel open at both of its ends. The mouthpiece is connected to the tobacco column by circumscribing air permeable tipping material therearound. In one embodiment, the mouthpiece includes a filter plug coaxially located at one end of the tobacco column with the filter plug being of generally the same diameter as the tobacco column. The filter plug has generally longitudinally extending grooves formed in the peripheral surface extending from one end to the other end of the filter plug. An air and smoke impermeable core member having a smaller diameter than the filter plug is located with its generally circular end in coaxial juxtaposition with the end of the filter plug opposite the tobacco column. A generally cylindrical sleeve having a diameter generally the same as the filter plug is concentrically located over the impermeable core member and cooperates with the core member to define a generally annular channel open at both of its ends. The mouthpiece is attached to the tobacco column by circumscribing air permeable tipping material therearound.
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