Cigarette with built-in central tube - reducing the content of nicotine, tar and carbon monoxide in the smoke

摘要

Tube made from a slowly burning or disintegrating gas-impermeable, self-extinguishing material (e.g. cellular glass, special paper etc) is axially placed in a cigarette so that the smoke is not passing through the still unburnt tobacco. As a result CO2 is not reduced to CO and the amt. of tar and nicotine carried with the smoke is greatly reduced.