Filtered smoking articles

Details Filtered smoking articles Filtered smoking articles

A - Human Necessities

24

D

131/11

A24D 3/04 (2006.01) A24C 5/56 (2006.01) A24D 3/18 (2006.01)

Patent

CA 1276090

"Improvements relating to Smoking Articles" A B S T R A C T A cigarette comprises a tobacco rod and a filter element of porous filtration material having an air permeable surface and equiangularly spaced lengthwise extending peripheral ventilation grooves. The element and the rod are interattached by a first air-impermeable wrapper which can extend into and line the grooves. A second wrapper is wrapped about the element and extends from the downstream end thereof for a distance short of the upstream ends of the grooves. The second wrapper does not line the grooves where it extends thereover. Ventilation air is then able to enter the upstream ends of the grooves not covered by the second wrapper and flow therealong. Ventilation is thereby achieved without the necessity for tipping wrapper perforations. A method of making such cigarettes is also disclosed.

526046

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