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Assignee: British-American Tobacco Company Limited


Location: London, GB2
No. of patents: 79

1    
NumberTitleIssue Date
6161552Low filler content cigarette wrappers
The invention relates to a cigarette paper having a low total filler content, 20% by weight of the paper or less, a proportion of the filler being a filler capable of effecting visible sidestream smoke reduction. The basis weight of the paper is about 30 ...
12/19/2000
5249588Smoking articles
A smoking article which comprises tobacco treated with a high loading level of humectant and which has been expanded by a high level expansion process to produce expanded tobacco having a humectant loading level in the range of 4% to 15%. The particulate ...
10/05/1993
5165426Processing of tobacco leaves
Lamina and stem components of tobacco leaf are fed simultaneously to a milling machine such that there is produced a fluent mixture of lamina and stem particles. The mixture, with little or no further particle size reduction can be fed to a cigarette maki...
11/24/1992
5148820Processing of tobacco leaves
Whole tobacco leaf is fed to a milling machine such that there is produced a mixture of lamina flakes and intact stem lengths. The lamina fraction, with little or no further particle size reduction can be fed to a cigarette making machine. The stem fracti...
09/22/1992
5139035Method of and apparatus for manipulating bales of condensed tobacco particles
Bales of compressed tobacco ribs and/or tobacco leaf laminae having a moisture content of 8-11 percent are advanced past a battery of microwave generators or through one or more electric high frequency fields to raise the temperature of particles in the b...
08/18/1992
5105839Smoking articles
Smoking articles in the form of a smoking material rod enclosed with a filter means by a paper wrapper are described wherein the density of the smoking material is in a range of from about 100 mg cm-3 to about 260 mg cm-3. The smokin...
04/21/1992
5072744Relating to the making of smoking articles
Smoking article rod is made by extruding a tobacco/binder mixture, with the addition of water, to provide a rod form extrudate, under conditions such that the extrudate is of a cross-section greater than that of the die orifice. The extrudate is drawn dow...
12/17/1991
5052412Making of smoking articles
In a method of making lengths of smoking-material rod, particularly cigaret lengths, smoking material and wrapper-web material are each continuously fed to a rod maker operable to wrap and seam-seal the wrapper material about the smoking material to provi...
10/01/1991
5050621Smoking articles
There is provided a smoking article comprising a heating unit, aerosol generation section in flow communication at a first end thereof with said heating unit, nicotine source in flow communication at a first end thereof with the heating unit, a mixing spa...
09/24/1991
4955398Relating to the monitoring of rod-like articles
The invention is based on the realization that for a rod-like article, a cigarette for example, having a plurality of ventilation gas flows, the flows can be equated to a single equivalent flow nominally occurring at an "equivalent ventilation point". By ...
09/11/1990
4949735Treatment of particulate materials
In a method and apparatus for treating particulate material, the material, when in a mobilization zone bounded by upwardly divergent walls, is subjected to a flow of gaseous mobilizing medium, supplied at a multiplicity of sites of the walls, and preferab...
08/21/1990
4911182Expansion of tobacco
Extraction means capable of providing a constant feed rate to the inlet of a tobacco expansion pneumatic transport system is provided at the outlet of a tobacco reservoir zone. The extraction means is preferably in the form of a pinned roller capable of m...
03/27/1990
4911684Smoking article mouthpieces
A method of making a ventilated cigarette filter plug in which a bore is thermally formed, by a laser beam for example, in a rod comprising a duct extending coaxially of the rod and matrix material surrounding the duct. The thermally formed bore extends t...
03/27/1990
4838286Smoking articles
In a smoking article comprising a smoking rod and a mouthpiece, the rod may comprise a wrapped body, of particles of tobacco and/or other smoking material, of which body the packing density is in a range of from 100 to 400 mg cm-3, a passage ex...
06/13/1989
4823817Tobacco reconstitution
Tobacco is reconstituted to provide a product of tobacco-filler size particles. Particulate tobacco, starch, binder and water are fed to an extruder, the operating conditions being such that in the sheet form extrudate water flashes off to steam, thus to ...
04/25/1989
4815482Treatment of particulate materials
Mobilization apparatus for the treatment, drying for example, of particulate material comprises a mobilization zone bounded by upwardly divergent walls. Particulate material in the zone is mobilized by being subjected to a flow of gaseous mobilizing mediu...
03/28/1989
4754766Tobacco smoke filters
A tobacco smoke filtration element having a first smoke-flow passage of filtration efficiency less than that of a second smoke-flow passage, the first smoke-flow passage being provided with a heat deformable material which, upon smoking of a smoking artic...
07/05/1988
4753113Measurement of the stiffness of packet blank creases
Apparatus for measuring the stiffness of creases of a packet blank comprises first and second spaced apart guides, on which a flat blank may be supported, and a plunger which is movable between the guides to deform the blank about a crease(s). The plunger...
06/28/1988
4727888Smoking articles
In the making of cigarette rod, which rod comprises an axial element of filler material and a wrapper surrounded by smoking material and an exterior wrapper, a web of the exterior wrapper material, a stream of the smoking material and a preformed rod, pro...
03/01/1988
4724848Smoking article filters
A smoking article comprises a wrapped rod of smoking material, a filter element and a tipping wrapper by which the rod and filter element are interattached. The filter element comprises a body of fibrous filtration material and paper wrapper securing the ...
02/16/1988
4721120Smoking articles
Smoking articles comprise a smoking material rod wrapped with a paper wrapper including aluminum hydroxide and an organic acid salt of a group I or II metal. The article exhibits at least 30% reductions in visible sidestream smoke when lit....
01/26/1988
4714083Making of multi-element smoking article rod
Oval or other non-circular cross-section filter tipped cigarettes are assembled by feeding, in axial-orientation controlled manner, tobacco rods and filter rods along first and second feed paths to an intercalation station at which the filter rods are int...
12/22/1987
4700724Smoking-articles mouthpieces-elements
A smoking article mouthpiece element comprises a first portion within which a smoke-passage and a ventilation-duct extends from end-to-end of the portion, a downstream end of the duct being spaced from the periphery of the first portion and the wall and t...
10/20/1987
4697604Expansion of tobacco
Tobacco expansion apparatus comprises a transport duct in which can be established a flow of hot gaseous medium and into an upstream end of which can be fed particulate tobacco. The downstream end of the duct opens into the casing of a tobacco/gaseous med...
10/06/1987
4696313Expansion of tobacco
The method for expanding tabacco lamina comprises contacting the tobacco with an organic expansion agent, heating the thus contacted tobacco in a closed first vessel so that the temperature of the agent is above the boiling point of the agent at a lower r...
09/29/1987
4693264Treatment of tobacco
In the expansion of tobacco, the tobacco is entrained in hot gaseous medium, separated from the gaseous medium and re-introduced and re-entrained in the gaseous medium before being once again separated from the medium....
09/15/1987
4685475Monitoring rod
Cigarette rod or cigarette filter rod comprising an outer, longitudinally seamed wrapper is monitored, to detect defects in the longitudinal seam, by directing, from a nozzle, a stream of air tangentially of the rod, whereby the air flows in Coanda effect...
08/11/1987
4662384Smoking articles
A smoking article, such as a cigarette, has a filter which incorporates a volatile smoke-modifying agent. The filter comprises zeolite granules impregnated with the volatile agent. A cavity-type of filter may contain between 10 and 200 mg of mentholated z...
05/05/1987
4660576Smoking articles
A mouthpiece element for a cigarette comprises a duct which extends from the periphery of the element at a first location, spaced from the mouth end of the element, to the mouth end of the element at a second location, spaced from the periphery of the ele...
04/28/1987
4660579Tobacco smoke filters
Cigarette filters comprises a filter element, open for smoke flow at the mouth end, and smoke passage of flow impedance less than that of the filter element. The passage is closed at the downstream end so that smoke is constrained to pass into the element...
04/28/1987
4644963Smoking articles
A cigarette comprises a mouthpiece attached to a cigarette rod by a wrapper which bounds a ventilation air chamber of the mouthpiece. One or more orifices intercommunicate the air chamber with a smoke passage of the mouthpiece. The orifice(s), rather than...
02/24/1987
4644964Smoking article mouthpiece elements
A smoking article mouthpiece comprises a smoke passage extending from end-to-end of the element and first and second ventilation ducts. The first ventilation ducts extend from the periphery of the element to the downstream end of the element at locations ...
02/24/1987
4641665Expansion of tobacco
A tobacco expansion agent capable of synergistic tobacco expansion comprises a first organic compound which is volatile, non-polar and substantially water insoluble and a second organic compound which is volatile, water soluble, oxygen containing and of a...
02/10/1987
4624268Smoking articles
A smoking article such as a cigarette comprising a smoking-material rod enwrapped in a wrapper paper with an inherent air permeability of 3 to 45 Coresta units and comprising at least one hydroxide compound and at least one organic compound of the group c...
11/25/1986
4607647Smoking articles
The smoking articles, such as cigarettes, comprise smoking material wrapped in a low side stream wrapper paper incorporating or being coated with a stain resist substance, such as EVA (ethylene vinyl acetate)....
08/26/1986
4601686Production of tobacco-smoke filters
The subject invention pertains to a device for operating upon a filter-rod lengths comprising a first conveyor for transferring the filter lengths from a supply outlet to a plurality of further conveyors. The further conveyors carry the filter lengths pas...
07/22/1986
4599699Cigarette manufacturing machines
A method is provided for monitoring cigarette manufacturing machinery in order to provide the machine minder with automatically displayed messages relating to process fault or deterioration conditions before these have led to out-of-specification product ...
07/08/1986
4591073Apparatus for monitoring particulate material
Apparatus for monitoring the amount of tobacco particles being conveyed in a stream thereof, is disclosed. The apparatus comprises a freely rotatable roller with surface ribs extending across the conveyor. The roller is supported by a counter balance arm ...
05/27/1986
4585737Preparation of oxygenated ambroxides
In a method for the production of an agent for modifying a smoke-flavor, ambroxide is contacted with a microbial culture to effect a transformation of at least a proportion of the ambroxide to a product comprising at least one oxygenated derivative of amb...
04/29/1986
4583558Marking of smoking article wrappings
A method of marking a smoking-article exterior wrapping, particularly a cigarette wrapping, in which the wrapping, comprising a substance which causes or undergoes a permanent change of color under the action of the application or transmission of energy, ...
04/22/1986
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