Coaxial filter cigarette

Tobacco – Tobacco or tobacco substitute product or component part thereof – Cigar or cigarette

Patent

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Details

131336, 131338, 131344, A24D 104

Patent

active

054390117

ABSTRACT:
The coaxial filter cigarette according to the invention contains of a coaxial rod portion and a coaxial filter element. The rod portion contains an inner core of a material glowing or smouldering substantially residue-free, in particular tobacco material, which is surrounded by a wrapper which in turn is surrounded by an outer jacket of a tobacco and/or non-tobacco material. A wrapper of an air-permeable material surrounds the outer jacket. The coaxial filter element has a filter core with an air-impermeable wrapper. A filter jacket having a diameter corresponding to the diameter of the outer jacket coaxially surrounds the filter core and its wrapper. An air-impermeable wrapper serving also to connect the rod portion and filter element surrounds the filter jacket. A ventilation zone is worked into the air-impermeable wrapper for the filter jacket. In the transition region between the rod portion and the filter element a smoke mixing zone is formed for defined variation of the smoke mixture leaving the rod portion before it flows into the filter element.

REFERENCES:
patent: 3359988 (1967-12-01), Thomson
patent: 3756250 (1973-09-01), Morgenstern
patent: 4649941 (1987-03-01), Norman et al.
patent: 4649945 (1987-03-01), Norman et al.
patent: 4658838 (1987-04-01), Leonard
patent: 4776354 (1994-10-01), Norman et al.
patent: 4874004 (1990-10-01), Borowski et al.
patent: 4986287 (1991-01-01), Schneider et al.

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