Cigarette

Details Cigarette Cigarette

1985-07-08

1987-07-14

Millin, V.

Tobacco

Tobacco or tobacco substitute product or component part thereof

Cigar or cigarette

131331, 131360, A24D 102, A24F 100

Patent

active

046795758

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to cigarettes. More particularly, the present invention relates to cigarettes which have lower tar contents in the main and sub smoke flows without changing the number of puffs per cigarette and the air permeation amount of the rolling material during smoking.


BACKGROUND ART

Techniques for reducing the sub smoke flow in cigarette smoking are known as per U.S. Pat. No. 4,231,377 and Japanese Patent Disclosure (Kokai) No. 57-163,479. A technique for reducing the main and sub smoke flows in cigarette smoking is known as per Japanese Patent Disclosure (Kokai) No. 48-61, 699.
In U.S. Pat. No. 4,231,377, a magnesium compound such as magnesia or magnesium hydroxide is added to rolling material to reduce the sub smoke flow. This patent does not provide any description of the main smoke flow.
In Japanese Patent Disclosure (Kokai) No. 57-163,479, the sub smoke flow is reduced using a rolling material having a small amount of air permeation (about 0.5 to 8 coresta). However, this technique has its disadvantages of increase in the main smoke flow and the number of puffs.
Japanese Patent Disclosure (Kokai) No. 48-61,699 discloses wrapping shredded tobacco with two rolling materials. The first rolling material directly wraps the shredded tobacco and is added with up to 70%, based on the first rolling material, of activated carbon having a particle size of 0.177 mm or less and containing particles having a size of 0.44 mm or less in an amount of 25 to 50%. The second rolling material consists of general cigarette paper and covers the first rolling material. These two rolling materials reduce the main and sub smoke flows. However, according to this method, the thickness of the rolling material is increased and interferes with the rolling operation of a conventional cigarette making machine. This leads to a need for a modified cigarette making machine or the development of a new type of cigarette making machine. Even if rolling with a conventional cigarette making machine can be performed, activated carbon may be separated or peeled off during rolling, thus adversely affecting the rolling conditions. This also renders maintenance of the cigarette making machine difficult.


DISCLOSURE OF INVENTION

It is an object of the present invention to provide cigarettes which when being smoked produce a reduced amount of tar without substantially changing the number of puffs and the air permeation amount of the rolling material.
It is another object of the present invention to provide cigarettes which produce a reduced amount of tar when being smoked without requiring a significant change in cigarette making procedures or without adversely affecting environmental conditions during cigarette making.
In order to achieve these objects, there is provided a cigarette having shredded tobacco and rolling material wrapping it, wherein a fire-retarding agent is present in the rolling material or on an outer surface of the rolling material, and a combustion promoter is present in the shredded tobacco or on an inner surface of the rolling material.
The cigarette according to the present invention has substantially the same number of puffs and air permeatation of the rolling material during smoking as conventional cigarettes and can be manufactured by substantially the same method as that of conventional cigarettes, produces less amount of tar when being smoked than conventional cigarettes.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a cigarette according to an embodiment of the present invention; and
FIGS. 2 to 4 are enlarged sectional views along the line a--a' in FIG. 1 for illustrating various embodiments of the present invention.


BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 1, the cigarette 10 according to the present invention has the same outer appearance as that of a conventional cigarette. That is, the cigarette 10 has shredded tobacco 12 and a rolling material 14 wrapping it. The rolling material is a sheetlike material used for encircling shredded

REFERENCES:
patent: 4033359 (1977-07-01), Borthwick et al.
patent: 4231377 (1980-11-01), Cline et al.
patent: 4452259 (1984-06-01), Norman et al.

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