Tobacco – Method or apparatus for making reconstituted tobacco – Extrusion
Patent
1986-11-07
1988-09-13
Millin, V.
Tobacco
Method or apparatus for making reconstituted tobacco
Extrusion
A24B 314
Patent
active
047701943
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of manufacturing a tobacco sheet used as a raw material for cigarettes or the like. More particularly, the present invention relates to a method of manufacturing sheet tobacco obtained by binding tobacco waste, such as tobacco powder, with a binder to produce large wrinkles.
BACKGROUND ART
So-called cut tobacco obtained by cutting tobacco leaves is used for usual tobacco articles such as cigarettes. In the step of cutting tobacco leaves or in other tobacco manufacturing steps, various types of tobacco waste such as leaf waste, cut waste, powder tobacco, or rib waste are produced. Conventionally, in order to effectively utilize such tobacco waste, it is bound to a suitable binder, and added with a reinforcing agent, a humectant, and the like. The mixture is extruded through a gap between a pair of rollers to form a sheet, and the sheet attached to the surface of one roller is separated therefrom with a doctor knife to obtain sheet tobacco (See Japanese Patent Publication No. 48-5919). The sheet tobacco is cut and mixed with normal cut tobacco and used as a raw material for cigarettes and the like.
When sheet tobacco manufactured in the above manner has wrinkles, it has considerable filling capacity (i.e., is bulky) when cut. Therefore, the amount of cut tobacco rolled as cigarettes can be reduced, resulting in economical advantages. In the above-mentioned method, when the sheet is separated by the doctor knife, wrinkles are formed in the sheet. However, as shown in FIG. 1, wrinkles formed in sheet tobacco in this manner are small wrinkles having a pitch of 0.1 to 0.2 mm and a height including the sheet thickness of about 0.2 mm when sheet tobacco having a thickness of 0.1 mm is used. Therefore, this sheet does not provide sufficient filling capacity when cut. Japanese Patent Publication No. 48-5919, mentioned above, discloses the use of a special doctor knife for forming large wrinkles. However, large wrinkles can be formed for only a short period of time due to wear on the doctor knife.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide a method of manufacturing sheet tobacco which has great filling capacity, in which large wrinkles can be formed even after a doctor knife becomes worn.
The above object is achieved by using a specified amount of a specified substance as a binder. Thus, there is provided according to the present invention a method of manufacturing wrinkled sheet tobacco by wetting a raw material powder containing tobacco with water, extruding the resultant wet powder through a gap between a pair of rollers, and separating sheet tobacco attached to the surface of one roller with a doctor knife, wherein one of the substances selected from those enumerated below is added to the raw material powder in an amount defined below. The amount defined below is an amount based on the overall weight of the powder before wetting with water (i.e., the total weight of the raw material powder):
(1) 4 to 10% by weight of an .alpha.-starch or propylene glycol alginate ester;
(2) 4 to 11% by weight of a hydrolyzed starch having a molecular weight of 100,000 to 900,000, gum arabic, a carboxymethyl cellulose salt having a molecular weight of 10,000 to 20,000, or a high methoxyl pectin having a degree of methoxylation of 7 to 17% and a degree of esterification of 62 to 77%; and
(3) a mixture of 1.9 to 7.9% by weight of a 4,4,6-triglucosaccharide polymer and 1.3 to 3.2% by weight of sodium carboxymethyl cellulose.
When a predetermined amount of one of the substances enumerated above is added as a binder to the raw material powder, sheet tobacco having large wrinkles with a pitch of about 2 mm and a height of about 1 mm can be obtained. Wrinkles formed by the method of the present invention are different from those formed by conventional methods in that small wrinkles are present in large wrinkles to provide a greater filling capacity, as shown in FIG. 2. In addition, the method of the present invention does not require a speci
REFERENCES:
patent: 2887414 (1959-05-01), Rosenberg et al.
patent: 3430634 (1969-03-01), Schweitzer et al.
patent: 4497331 (1985-02-01), Nellen
Furuya Norio
Kataoka Satoru
Ohashi Yukinari
Watanabe Masataka
Japan Tobacco Inc.
Millin V.
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