Cigarettes
OwnerCharles C. Cohninventor
Life of this patent
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Abstract
A self-extinguishing cigarette particularly when in contact with a flammable surface wherein the wrapper which encloses the body of tobacco is provided with a coating deposited from an aqueous solution of an alkali silicate. The silicate solution contains from about 17 to 27 percent by weight of SiO.sub.2. The coating area of the silicate solution on the wrapper is from about 40 to 84 percent of the entire outside wrapper area. The silicate solution may have added thereto various beneficial additives such as acids, carbohydrates, colloids, humectants, fire retardent compounds, alumina gel compounds, or compatible compounds of the aforesaid additives.
Claims18
In a cigarette having a body of tobacco enclosed by a combustible wrapper, a heat insulating coating on said wrapper making the cigarette self-extinguishing when in contact with a surface, said coating being deposited from an aqueous solution of a soluble alkali silicate containing from about 17 to 27 percent by weight of SiO.sub.2, the coating area of the silicate solution on the wrapper being from about 40 to 84 percent of the entire wrapper area to produce a cigarette which is self-extinguishing when in contact with a flammable or other surface, said coating area being generally evenly distributed along the length of the wrapper to reduce the burning rate of the wrapper throughout its length and to limit the air access to the burning tobacco throughout the length of the wrapper.
Dependencies are inferred from the claim text.