Improvements relating to the production of tobacco smoking materials

• Main Authors: GREEN SYDNEY JAMES, NICHOLL PETER JAMES
• Format: Patent
• Language: English
• Published: 24.02.1965
• Subjects: CIGARETTES; CIGARS; HUMAN NECESSITIES; MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ORCHEWING; SMOKERS' REQUISITES; SNUFF; TOBACCO

983,928. Treating tobacco. BRITISHAMERICAN TOBACCO CO. Ltd. April 22, 1963 [May 3, 1962], No. 17071/62. Heading A2C. In a process for the production of a tobacco smoking material from fine tobacco particles, the tobacco is ground to a flour, mixed with a minor proportion of added water without a binder and the mixture extruded, the mixture being plasticized by the mechanical work to which it is subjected during extrusion so as to release the inherent gumminess of the tobacco. The only additive may be a humective such as glycol. The tobacco is preferably extruded in filament form which may be flattened and broken into lengths by a pair of rollers and crinkled by drying. As shown in the flow diagram, the tobacco material is first desanded at 1 by density differentiation, or by sieving and pneumatic sorting; dried at 2 to a moisture content of 4-6%; ground at 3 to pass a 100-mesh sieve, preferably a 200-mesh sieve; mixed with water at 6 to give a moisture content of 16-30%, up to 5% to glycerol also being added; extruded in a conventional extruder; passed between a pair of rollers which flatten the filaments and by rotating faster than the filament feed cause the filaments to be broken into short lengths; finally dried at 9 which crinkles the filaments, which may then be blended with cut tobacco.