Cigarettes include a filter element which have a gathered web of paper incorporating a carbonaceous material. The paper is gathered so as to include a plurality of longitudinally extending channels, and the channels provide a cross-sectional void area of about 5 to about 30 percent of the filter element.
申请公布号
US5360023(A)
申请公布日期
1994.11.01
申请号
US19920898111
申请日期
1992.06.12
申请人
R. J. REYNOLDS TOBACCO COMPANY
发明人
BLAKLEY, RICHARD L.;SHELAR, GARY R.;GENTRY, JEFFERY S.;WORRELL, GARY W.;PERFETTI, THOMAS A.
