Cigarette and filter with downstream flavor addition

A multi-component filter of a smoking article comprising:

• an absorbent bearing segment adjacent an upstream end portion of the filter, the absorbent bearing segment including a bed of adsorbent particles and having a particulate efficiency in the range 10-20% and a lesser RTD;
• an RTD-inducing segment including a flow constriction and ventilation, the RTD-inducing segment being located at an intermediate location along said filter, the RTD-inducing segment having a particulate efficiency in the range of 10-20%;
• and
• a flavor releasing segment at a downstream location along said filter, said flavor releasing segment having a particulate efficiency in the range 10-20% and a lesser RTD;
• the lesser RTD being less than an RTD of the RTD inducing segment.

A cigarette comprising a tobacco rod and a multi-component filter comprising:

• a bed of adsorbent particles and a flavor-releasing filter segment located downstream of the bed of adsorbent particles, said bed of adsorbent particles being flavor-bearing and comprising high surface area, activated carbon so that as mainstream smoke is drawn through the upstream portion of the filter, gas phase smoke constituents are removed and flavor is released from the bed of adsorbent particles and thereafter additional flavor is released into the mainstream smoke as it passes through the flavor-releasing filter segment;
• filter ventilation arranged at a location spaced downstream from the adsorbent bed of adsorbent particles so as to lower mainstream smoke velocity through the adsorbent bed;
• and
• said carbon bed comprising at least 90 to 120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85% filled condition or better,
• wherein said cigarette achieves a significant reduction in a gas phase constituent of the mainstream smoke.

A cigarette comprising a tobacco rod and a multi-component filter comprising:

• a bed of adsorbent particles comprising a high surface area, activated carbon so that as mainstream smoke is drawn through the upstream portion of the filter, gas phase smoke con constituents are removed;
• filter ventilation arranged at a location spaced downstream from the adsorbent bed of adsorbent particles so as to lower mainstream smoke velocity through the adsorbent bed;
• and
• said carbon bed comprising at least 90 to 120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85% filled condition or better;
• and
• said filter ventilation being spaced from a mouth end of said cigarette by at least approximately 12 mm;
• wherein said cigarette achieves a significant reduction in a gas phase constituent of the mainstream smoke.

A cigarette comprising a tobacco rod and a filter, the filter comprising:

• a first filter plug adjacent the tobacco rod;
• a second filter plug in a spaced apart and downstream relation to said first filter plug so as to define a cavity therebetween, said second filter plug including a flavor-bearing filament and ventilation perforations;
• a bed of adsorbent particles in the cavity, said adsorbent comprising activated carbon particles in an amount of 160 to 180 mg or greater in the cavity, with said cavity in an 85% filled condition or better, said activated carbon particles being flavor-bearing;
• and
• a third, mouth piece filter plug located downstream from said second filter plug, said first, second and third filter plugs being essentially free of carbon particles;
• wherein said filter removes at least 90% of at least one of 1, 3 butadiene, acrolein, isoprene, propionaldehyde, acrylonitrile, benzene, toluene and styrene from mainstream smoke as the smoke is drawn through said filter, said fitter releasing flavor into mainstream smoke as the smoke is drawn through the bed and the second plug of the filter.