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US 4,452,259 AGranted
Smoking articles having a reduced free burn time
AssigneeLoew's Theatres, Inc.
InventorsVello Norman, Arthur M. Ihrig
Life of this patent
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AssigneeLoew's Theatres, Inc.
InventorsVello Norman, Arthur M. Ihrig
Estimating the term…
This invention relates to smoking articles having reduced free burn time, including cigarettes, cigars and little cigars. The smoking article comprises tobacco wrapped in a paper having at least one circumferential band printed between the ends of the smoking article; preferably at about the center of the smoking article. The band contains a substance which will cause the smoking article to extinguish in about 2-5 minutes under free burn conditions after the cone reaches the banded area if it is not puffed. The band is typically about 2-10 mm wide containing a substance which is a liquid in the temperature range of about 100.degree. C. to 200.degree. C. and which as the burning cone comes in contact with it provides a fluid film on the paper, without substantially penetrating through the surface of the paper, which film is substantially impervious to air and decomposes and/or distills endothermically from about 140.degree. C. to 300.degree. C. to yield gaseous decomposition products normally present in the smoke of smoking articles without the band. The amount of the substance used in the band should be sufficient to extinguish the smoking articles under free burn conditions within 2- 5 minutes.
In a smoking article having a reduced free burn time comprising tobacco wrapped in paper having at least one circumferential band printed between the ends of the smoking article, the band containing a substance which will cause the smoking article to extinguish if it is not puffed, the improvement which comprises an air permeable band about 2-10 mm wide which will not interfere with smoking if the article is puffed normally, said band containing a substance which is a liquid in the temperature range of about 100.degree. C. to 200.degree. C. and which, as the burning cone comes in contact with it, provides a fluid film on the paper, without substantially penetrating into the paper, which film once formed substantially restricts the flow of air to the burning cone and distills and/or decomposes endothermically from about 140.degree. C. to 300.degree. C. to yield gaseous decomposition products normally present in the smoke of smoking articles not having the band, the amount of said substance being effective to extinguish the smoking article within 2-5 minutes, under free burn conditions, after the cone reaches the banded area.
A method of treating the paper of cigarettes and other smoking articles in order to reduce the free burn time comprising (a) mixing a substance which is a liquid in the temperature range of about 100.degree. C. to 200.degree. C. and which when a burning cigarette cone comes in contact with it forms a fluid film on the paper without substantially penetrating into the paper, which film one formed substantially restricts the flow of air to the burning cone and distills and/or decomposes endothermically from about 140.degree. C. to 300.degree. C. to yield gaseous decomposition products normally present in the smoke of untreated cigarettes;
Dependencies are inferred from the claim text.