초록 ▼

A device and process for using same is described for controlling free burn rate of a lit cigarette. The device is mountable on a cigarette and is adapted to permit insertion and movement of the cigarette into the device. The device includes a unit which controls rate of air diffusion to reduce suppl

A device and process for using same is described for controlling free burn rate of a lit cigarette. The device is mountable on a cigarette and is adapted to permit insertion and movement of the cigarette into the device. The device includes a unit which controls rate of air diffusion to reduce supply of oxygen for supporting tobacco combustion by the lit cigarette coal. The structure for controlling rate of air diffusion is non-combustible at combustion temperature of a lit cigarette coal. By use of this device, the number of puffs per cigarette is greatly increased and, depending upon the selected design of the device for controlling free burn rate can reduce sidestream smoke emitted by a lit idle cigarette.

대표청구항 ▼

[ We claim:] [1.] A device for controlling free burn rate of a lit cigarette and the like, said device comprising:i) an inner ring having an interior dimension to surround and contact cigarette perimeter, said inner ring defining an annulus of porous material which provides tortuous paths of air flo

[ We claim:] [1.] A device for controlling free burn rate of a lit cigarette and the like, said device comprising:i) an inner ring having an interior dimension to surround and contact cigarette perimeter, said inner ring defining an annulus of porous material which provides tortuous paths of air flow along a length dimension of said inner ring;ii) said interior dimension permitting said inner ring to be slid along a cigarette as a cigarette is smoked,iii) an outer ring encasing said inner ring to direct air flow along said length dimension of said inner ring;iv) said tortuous paths of said annulus controlling rate of air diffusion to reduce supply of oxygen for supporting tobacco combustion by a lit cigarette coal and controlling thereby free burn rate of a lit cigarette.