Patent ID: 6371127
Filing Date: 2002-04-16
Classification: A24B,A24D,A24F

Abstract:
A device for minimizing cigarette sidestream smoke and reducing free-burn rate of a burning cigarette, said device comprising:i) a non-combustible porous tubular element encasing an effective length of a tobacco charge of a cigarette located in said tubular element, said tubular element having an open end while said cigarette is smoked and said open end is adjacent a distal end of said cigarette to permit lighting of such cigarette distal end and permits ingress of air; and ii) said tubular element having a predetermined porosity along at least its length which encases said effective length of said tobacco charge for both minimizing sidestream smoke emission from a burning tobacco charge and reducing free-burn rate of such burning tobacco charge to increase number of puffs from such burning tobacco charge, where said predetermined porosity for said tubular element; a) retains around a burning ember of said cigarette oxygen deprived combustion gases within said tubular element to reduce rate of combustion and minimizes release of smoke particles through said porous tubular element; and b) restricts inward flow of air to reduce free-burn rate of said cigarette.