A cigarette filter assembly (10) comprises a hollow paper tube (12) with a spaced apart solid fiber plugs (14, 18, 22) inside the tube together with granular filter material (16, 20) in the spaces between the plugs. Energy activated adhesive is only between the solid filter plugs and interior surface portions of the tube. After the spaced apart solid fiber plugs are within the tube the adhesive is activated to secure the plugs to the tube. The energy activated adhesive is only on selected portions of the hollow tube where the solid fiber plugs are located or alternatively the adhesive is only on the exterior surface portions of the solid fiber plugs.
申请公布号
WO2008038151(A8)
申请公布日期
2008.11.13
申请号
WO2007IB03926
申请日期
2007.09.26
申请人
PHILIP MORRIS PRODUCTS S.A.
发明人
EVANS, JAMES, D.;SCOTT, G., ROBERT;SPIERS, STEVEN, F.