R.j. Reynolds Tobacco Company

William H Graves, Jr

Carolyn Rierson Carpenter

Kenneth Wayne Smith

Gerard E Leonard

Benny L Hester

Howard C Toft

Bruce P Bradford

Gary W Wallace

Extruded smokable material is provided by extruding a moist mixture of divided tobacco and a binding agent which includes locust bean gum and xanthan gum. The mixture is subjected to temperatures about 80.degree. C. during extrusion such that this binding agent components are solubilized and the binding agent is activated. The adhesive character of the binding agent is believed to be provided by heat initiated inter polymer chain associations between the component binders. The tobacco material and binding agent mixture is extruded above the temperature at which the activated agent forms a gel. The extrudated is cooled and the binding agent forms a gel, resulting in a resilient smokable material.

Extruded tobacco materials

Co-extruded smokable material in sheet-like form has a multi-layered structure. The layers are generally parallel to the major surface of the material. The material is provided by subjecting at least two filler materials to high shear agitation and co-extruding the materials while in a semi-soft state. The multi-layered material can be sized by roll treatment in order to provide a sheet-like material having a thickness of less than about 0.008 inch. In particular, the co-extruded multi-layered smokable material is subjected to compressive treatment applied perpendicularly to the major surface of the co-extruded marterial to provide a co-extruded smokable material of reduced thickness. The material so provided can be cut into small sheets (e.g., about 4 inches by 4 inches square) or into strands and employed as cut filler in the manufacture of cigarettes.

Tobacco material processing

Tobacco material can be processed to yield a product (e.g., sheet-like material) which can be used to yield cut filler for the manufacture of cigarettes. Tobacco material (e.g., whole leaf and/or scrap) is shear agitated in the presence of moisture of less than 30 weight percent. The shear agitation is performed in the absence of externally added binding agents. The sheared mixture is passed through a roller system in order to provide compressive treatment to the mixture. The processed mixture is further formed into the desired shape. Tobacco material can be provided using energy efficient processing steps, and without waste of tobacco material.

Tobacco extender material is provided in sheet-like form by contacting tobacco material and/or carbonized material in substantially dry form with a binding agent in substantially dry form, and then subjecting the mixture to a high rate of shear agitation in the presence of a relatively low moisture content. The level of moisture is sufficient to provide activation of the binding agent. The material so processed is further processed using dry forming techniques in order to provide sheets of reconstituted tobacco material and sheets of carbonized material. The sheets of tobacco extender can be cut to the desired size and is useful in the manufacture of cigarettes.

Process for providing tobacco extender material

Tobacco extender material is provided in strand form by contacting tobacco material and/or carbonized material in substantially dry form with a binding agent in substantially dry form, and then subjecting the mixture to a high rate of shear agitation in the presence of a relatively low moisture content. The material so processed is further processed using dry forming techniques in order to provide strands of reconstituted tobacco material and strands of carbonized material. The strands of tobacco extender are useful in the manufacture of cigarettes.

Whole leaf tobacco can be processed to yield a sheet-like product which can be used to cut filler for the manufacture of cigarettes. Whole leaf tobacco including stem is shredded and contacted with a binding agent in dry form. The essentially dry mixture is shear agitated in the presence of moisture less than about 30 percent, based on the total weight of moisture, binding agent and tobacco. The divided tobacco is subjected to the high shear agitation in the presence of sufficient moisture to provide for activation of the binding agent. The sheared mixture is passed through a roller system to provide compressive treatment to the mixture. The processed mixture is further formed into a sheet-like shape. Tobacco material can be provided using low amounts of binding agent, using energy efficient processing steps, and without waste of tobacco material.

Tobacco leaf processing

A method and apparatus for testing packages for leaks. Selected values of suction and positive pressure are supplied to a testing position, which may be a test head. A package to be tested is held in the testing position by the suction, and positive pressure is introduced into the package through a puncture, which may be made before or after the package is placed in position. Values of suction and positive pressure are chosen such that a package meeting leakage specifications will contain sufficient positive pressure to overcome the suction, causing the package to be ejected from the testing position. If the package does not meet specification, leakage will cause the suction to hold the package in position. Thus, a rapid and visible indication of package quality is provided.

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Pfafftown, NC, United States of America

William H Graves, Jr