Smoking articles comprising a high density, relatively low porosity coherent mass of combustible tobacco-containing material having at least one passage extending therethrough are disclosed. In a preferred embodiment the smoking article is a cylinder having at least one passage axially therethrough. The smoking article may further comprise a plug of ignitable material in passage blocking position at one end of the passage, said plug being such as to permit puff induced air flow therethrough. At least one additional plug may be similarly disposed at the opposite end of the passage or at an intermediate point in the passage. By adjusting the density, the surface area and/or the porosity of the mass available for combustion, the per puff delivery of tar by the smoking article upon combustion may be controlled.
申请公布号
US4391285(A)
申请公布日期
1983.07.05
申请号
US19800148124
申请日期
1980.05.09
申请人
PHILIP MORRIS, INCORPORATED
发明人
BURNETT, GEORGE H.;CLAFLIN, WARREN E.;LANZILLOTTI, HARRY V.;LILLY, JR., A. CLIFTON;NIENOW, JOHN F.;OSDENE, THOMAS S.;WAYTE, ALLINE R.