Abstract: A cigarette comprises a blend of tobacco materials and a filter element provided from a non-woven thermoplastic material. The non-woven material comprises polyester or polypropylene fibers. The non-woven material is in intimate contact with an acidic material (e.g., phosphoric acid) or a basic material (e.g., sodium hydroxide).

Abstract: An acetate tow having crimp modulus, wherein a degree of crimping of the acetate tow at a position just downstream of a delivery roller of a filter rod making machine used to form a filter rod is 1.4 or more.When the acetate tow is bloomed in the filter rod making machine, a tendency which the acetate tow is caught on a feed roller becomes very low, and when the filter rod is formed of the acetate tow, a filter rod having a high pressure drop can be obtained.The present invention further includes a method of manufacturing the acetate tow, in which a specified acetone content is maintained in the acetate tow and a specified temperature, determined on the basis of the acetone content, is used in a process of crimping the acetate tow.

Abstract: Disclosed is a novel process of preparing tobacco smoke filter material, wherein an acidic compound such as citric acid is dissolved in a cellulose acetate spinning solution (dope) prior to spinning the filaments of the filter material.

Abstract: Hydrophobic particles containing polar groups on their surfaces are incorporated into a tobacco smoking article to remove deleterious chemical compounds, both polar and non-polar, from the tobacco smoke.

Abstract: A cigarette comprises a blend of tobacco materials and a filter element provided from a non-woven thermoplastic material. The non-woven material comprises polyester or polypropylene fibers. The non-woven material is in intimate contact with a water soluble tobacco extract and a further material for altering the character of mainstream smoke which passes through the filter element. The tobacco extract can be a spray dried extract which has been subjected to heat treatment. The further material can be an acid (e.g., levulinic acid), a base (e.g., sodium hydroxide) or a salt (e.g., diammonium hydrogen orthophosphate).

Abstract: This invention relates to a filter cartridge suited for filtering highly viscous liquid.According to the invention, non-twisted yarn (sliver) and hard linear material such as strongly-twisted material supporting the non-twisted yarn on the core such as to form inter-yarn pores between the non-twisted yarn and hard linear material.

Abstract: Cigarettes have filter elements which have a relatively low efficiency for filtering particulate matter of tobacco smoke and a relatively high pressure drop. Such filter elements are provided by shredding, gathering or pleating a sheet-like web of a paper which has a low air permeability and exhibits a pH above about 9. The paper used to provide the filter material of the filter elements incorporates a magnesium hydroxide filter.

Abstract: The invention relates to a novel, highly efficient tobacco smoke filter provided with mechanically (fibrous) and/or adsorptively filtering materials as well as chemosorptively filtering components, which comprises a synergistic composition containing at least one of a compound having a high nucleophilic additivity, capable of chemically reacting and stable adduct forming with excited and ground-level aldehydes not filtered out by the mechanically and/or adsorptively filtering materials; and at least one of a compound containing ##STR1## enediol structural moieties, wherein the enediol type compound or its combination suitably amount to at least 50% by weight of the other chemosorptive components and 40 to 300% by weight of the adsorptively filtering materials.

Abstract: A filter cigatette comprises a tobacco rod having a tobacco mixture with a low packing or filling density, a first filter element racing the tobacco rod, having a retention capacity of 40 to 80% and consisting of a fibrous material having a low single denier and a high total denier, a second filter element facing the mouth of the smoker and having a retention capacity of 15% at the maximum, and a hollow chamber formed between the two filter elements and having a length of 3 to 7 mm at an overall length of the filter between 18 and 30 mm. The two filter elements and the hollow chamber are surrounded by a paper wrapper and an air-permeable tipping paper with a ventilation zone in the region of the hollow chamber; said ventilation zone ensures a ventilation degree of 50 to 85% and is created on the finished cigarette by laser beams or by mechanically produced perforations through both papers.In this way a more intensive taste sensation can be achieved together with a low nicotine to condensate ratio.

Abstract: A method for treating nicotine containing materials such as tobacco, tobacco smoke and tobacco extracts involves adding to an adsorptional filter material postassium aluminum sulfate, KAl (SO.sub.4).sub.2, commonly known as alum, in a quantity of 10 to 200 mg per cigarette, which additive is capable of chemical binding of nicotine and other toxic materials in the tobacco smoke.

Abstract: A cigarette filter has a substantially cylindrical inner member of filter material surrounded by an outer member of filter material and a plugwrap. The density of the inner and outer members are typically different, and a flavorant is added to at least one of the members. Methods and apparatus for making the filter are also disclosed.

Abstract: A tobacco smoke filter comprising a rod of tobacco smoke filtering material incorporating particulate additive, wherein at least some of the particulate additive is concentrated on one or a restricted number of threads and/or strips incorporated within the remaining body of filtering material, the additive adhering to said thread(s) and/or strip(s).

Abstract: A filter for a smoking article includes: a flavorant; a hollow fiber made of a thermoplastic, the flavorant dispersed in the thermoplastic; and a filter plug in which the fiber is embedded. Additionally, the hollow fiber may be sheathed with a layer of cellulose acetate.

Abstract: A cigarette filter comprising longitudinally aligned core components a first of which is air-permeable and of relatively high pressure drop longitudinally of the filter but substantially air-impermeable radially of the filter and a second of which is air-permeable and of relatively low pressure drop longitudinally of the filter, and a common wrap or partial wrap which extends along and around or partially around said core components and provides for ventilation of the filter at a region longitudinally spaced from the first core component.

Abstract: A tobacco smoke filter having a non-integral core of components [2, 3] joined and held in longitudinal alignment by a strip [1] which extends only partially around the core circumference to leave a gap [7] extending longitudinally of the core between the longitudinal edges [8] of the strip, and an outer wrap [5] which engages fully around the core and strip and provides--e.g. via perforations [9]--for the lateral ingress of external ventilating air therethrough and through the longitudinal gap.

Abstract: A smoke filter and a method for manufacturing the filter from a continuous multifilament filter tow are described in which a portion of the filter tow is treated with a dye to impart color to a discrete elongated zone of dye-treated filaments that is in substantial alignment with the longitudinal axis of the smoke filter.

Abstract: Tobacco smoke filters are disclosed which are useful for manufacturing filter cigarettes and which are formed from a continuous multifilament filter tow that is treated with a smoke-modifying agent during the filter manufacturing process to give a discrete elongated zone of filaments treated with the smoke-modifying agent.

Abstract: 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 article incorporating such a filtration element, deforms and thereby obturates the first smoke-flow passage causing smoke to pass along the second smoke-flow passage and thereby to be subjected to a higher degree of smoke filtration after the first stages of the smoking cycle.

Abstract: In order to obtain, during the smoking of a cigarette, each time the smoker draws, an amount of condensate which is more constant or is even less than heretofore, there is provided a cigarette filter unit having at least one membrane in the form of a screen positioned across the smoke-gas flow paths, the unit acting, while the cigarette is being smoked, as an internal bypass element. To this end, the spatial distribution of the openings in the membrane, and the cross sectional areas thereof, are accurately determined as to the size and shape. The thickness of the membrane is between 10 and 150 .mu.m, the number of openings therein is between 500 and 25,000, and the cross sectional area of the openings is between 80 and 3,000 .mu.m.sup.2.

Abstract: A filter comprising kaolin fibers useful for removing deleterious materials from tobacco smoke and reducing the temperature thereof.

Abstract: A cigarette having internal heat sinks of aluminum mesh and a section of carbonized flue-cured tobacco stem material containing adsorbed nicotine produces smoke having lower TPM and higher nicotine than smoke from conventional cigarettes.

Abstract: 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 the walls of the duct being gas impervious and a second portion disposed at the end of the first portion being in smoke-flow communication with the smoke passage of the first portion, and gas-impervious wall at the end of said second portion closer to the first portion extending inwardly from a first location at the periphery of the element to a second location at the side of the upstream end of the duct further from the first location, the wall bounding a cavity in communication with the duct and segregated from the interior of the second portion. The first and second portions may form respective parts of an integral unit or may be discrete components disposed in end-to-end abutment. The aforesaid wall is suitably part of the second portion.

Abstract: Filter cigarettes exhibiting a low amount of visible staining have a tobacco rod, an axially aligned filter element having a barrier region positioned on the back face thereof such that air and smoke traveling through the filter element exits the filter element towards the periphery thereof, and an axially aligned tubular mouthpiece element positioned in a spaced apart relationship with the filter element such that air and smoke exiting the filter element travels through the path of least resistance provided by the spaced apart region and the hollow region of the tube.

Abstract: A cigarette having a plurality of thin flat discs aligned along the central axis of the cigarette wherein the surfaces of the disc condense the tobacco smoke therein.

Abstract: A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke flow through the grooves and promote a ventilation effect. The blocking members in each groove are longitudinally staggered from one groove to the next to simplify the production of the device.

Abstract: A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough and a hollow, generally cylindrical mouthpiece coaxially located with the filter rod at the mouth end of the filter rod. The filter rod is circumscribed by a non-porous wrapper, and the filter rod with the non-porous wrapper therearound is provided with grooves extending from the mouth end thereof a preselected distance longitudinally therealong. The mouthpiece is formed with air flow channels in flow communication with the grooves of the filter rod, and smoke flow channels in flow communication with that area of the filter rod mouth end between adjacent grooves of the filter rod. Tipping material circumscribes the filter rod and the mouthpiece, and is provided with flow-through openings therein in flow communication with the grooves.

Abstract: A method is disclosed for producing tobacco smoke filters wherein a continuous tube of smoke filtration material is ensheathed in a smoke-pervious layer of fibrous material. The ensheathed tube is cut into discrete lengths and in each of the lengths a cross section of the ensheathed material is rendered impervious to the passage of tobacco smoke and the tube is closed at a distance spaced longitudinally from the cross section.

Abstract: A filter device for a cigarette includes a porous filter rod and a smoke impermeable mouthpiece located at the smoke outlet end of the filter rod. The mouthpiece is formed with a converging nozzle open to the smoke outlet end of the filter rod, and a diverging nozzle, in flow communication with the converging nozzle, open to the outlet or mouth end of the mouthpiece. In addition, a number of smoke flow capillaries are formed generally longitudinally through the mouthpiece. Each smoke flow capillary has an open inlet end open to the smoke outlet end of the filter rod and an open outlet end open to the mouth end of the mouthpiece. A tipping material circumscribes the filter rod and mouthpiece for holding them together and for attaching the filter device to the tobacco column of the cigarette. The tipping material is air permeable over at least a portion of the filter rod.

Abstract: A cigarette mouthpiece of substantially cylindrical configuration assembled of two identical semi-cylindrical sections disposed in mutual concavely facing relationship with each longitudinal edge of one section in abuttment with a different one of the longitudinal edges of the other section. When assembled into a mouthpiece, the semi-cylindrical sections cooperate to define a plurality of generally longitudinally extending air ventilation grooves equally spaced from each other around the perimeter of the mouthpiece and a plurality of smoke flow capillaries extending generally longitudinally through the mouthpiece.

Abstract: A filter plug having a dual structure comprising filter element A made from a crimped long filter tow in a form of a plug, filter element B, joined to said A, prepared by wrapping a core material consisting of a long fiber tow in a sheet-formed product having grooves which is formed from a material having an air permeability of 8 liters/minute or less and an air permeable wrapping paper and/or a wrapping paper with perforated openings on its periphery which is wrapping therein said filter elements A and B so that the outer grooves parts of the sheet-formed product pass through in the longer direction of the filter plug.

Abstract: A compound cigarette filter, the filter having the ability to deliver substantially constant tar and nicotine as the cigarette is smoked. The compound filter comprises a barrier positioned upstream and in abutting relationship with at least one filter segment, the barrier containing passageways permitting the passage of smoke from a tobacco column to the filter segment, the total cross-sectional passageway area being from 0.5 to 3 square millimeters, the compound filter having an initial totally encapsulated pressure drop of at least 90 mm. H.sub.2 O.

Abstract: A highly-porous silica gel charged with 10% by weight of anethole and 20% by weight of deactivating agent is used in the tip of a cigarette in order to aromatize the smoke drawn from the cigarette in a simple way with anethole even after prolonged storage of the cigarette.

Abstract: The filter comprises a tobacco smoke filtration tube ensheathed in a layer of smoke pervious thermoplastic material. The layer is encased in a plugwrap. The layer has a transverse cross-section rendered impervious to smoke tobacco by use of an annular sealing groove. The tube is closed at a location spaced longitudinally from the groove by a V-shaped annular groove.

Abstract: A smoke-filter rod comprises a body of rod form consisting or having as at least major constituent a thermoplastics cellulose acetate or polypropylene smoke-filtration material, preferably of a fibrous or filamentary nature, and wrapped in a plugwrap comprising at least 50%, suitably at least 90%, by weight of fibres or filaments of, respectively, cellulose acetate or polypropylene material of substantially the same chemical identity as said major constituent of the filtration material, said plugwrap being bonded to said body and having a permeability for air of not less than 10,000 Coresta units. The bonding is by an agent which is a bonding agent for the material of said plugwrap and said filtration material, suitably triacetin in the case of cellulose acetate. Portions of such filter rod can be subjected to a hot-shaping process.

Abstract: A tobacco smoke filter having an improved tar/carbon monoxide ratio is disclosed. The filter is obtained by sealing off the center portion of the filter with an inner member which is impermeable to the passage of smoke, thus directing all of the smoke to the periphery of the filter. In one embodiment, the inner member is formed as a thin walled tube of a material such as polypropylene, with the tube being crimped to seal one end of the tube. The crimped tube is then overwrapped with a smoke permeable material.

Abstract: The sensory effect of cigarette smoke is improved by using a disc (24) to shape the flow of smoke (32) leaving smoking article (10) into a divergent pattern, thus increasing the perceived flavor of the cigarette. The effect is most useful with cigarettes having relatively low delivery of particulate matter.

Abstract: A cigarette filter composed of a bundle of cellulose acetate filaments having at least two different filament denier sizes randomly distributed in the direction perpendicular to the longitudinal axis of said filter.

Abstract: A tobacco smoke filter having at least one directly ventilated cavity which provides for the formation, over a region of the filter extending inwardly of its peripheral region, of a mixture of at least the major proportion of the smoke and at least a major proportion of the ventilating air entering the said cavity or cavities. The extensive and uniform mixing of smoke and ventilation air gives a satisfying smoke with a low tar count and high nicotine/tar ratio, and can be obtained with the invention due to appropriate shaping of the cavity, or asymmetric positioning of the air ventilating vents, or by means of a flow-disturbing insert mounted in the filter, or a combination of two or more of these factors. Preferably a major part of the smoke is constrained to enter the cavity at an upstream peripheral extremity thereof and air vents are also concentrated at this extremity.

Abstract: Molding tobacco filters having a variety of cross-sections which are practically useful in providing various preferable effects such as improvement in pressure drop, balanced adsorption of smoke component or the like, are provided according to a method which is characterized in forming fiber bundles of composite fibers consisting of a first and a second component by themselves, or a mixture of at least 20% by weight (based upon the total fiber mixture) of said composite fibers and another kind of fibers so as to give a variety of cross-sections to said fiber bundles, and subjecting said fiber bundles to heat-treatment at a temperature lower than the melting point of the first component but higher than the melting point of the second component to stabilize the structure by the self-adhesion of the second component; the first component of a fiber forming polymer and the second component consisting of one or more kinds of polymer having a melting point lower than that of the first component by 10.degree. C.