Abstract: A cigarette filter is surrounded by a wrapping paper, and the wrapping paper includes metal only on portion of a surface thereof, such that air can penetrate through the wrapping paper into the filter.

Abstract: A filter includes at least two monolithic sorbent segments and a mixing segment between the two monolithic sorbent segments. The monolithic sorbent segments comprise porous sorbent materials that are capable of selectively removing one or more selected gaseous constituents from a gas flow. The filter can be incorporated in a smoking article, such as a cigarette, to remove one or more selected constituents from mainstream smoke. Methods for making the filter and smoking articles including the filter, as well as methods for smoking a cigarette comprising the filter, are also provided.

Abstract: A filter for a cigarette and a filter-tipped cigarette having a high degree of freedom in control of filtering-efficiency of smoke are provided. The filter has a core 10 and a sheath 12 made preferably of tow of cellulose acetate fibers. A plurality of axial passages 16 is formed between the core and the sheath and extend continuously between both end faces of the filter.

Abstract: The present invention pertains to the tobacco industry and may be used in the production of smokers' articles that include a mouthpiece and consist of a new product that conjugates the functional properties and qualities of cigarettes with a cardboard mouthpiece and of filter cigarettes. To this end, this smokers' article comprises a tobacco rod wrapped in a separate sleeve of cigarette paper as well as a flexible and elongated mouthpiece which is connected to said rod and has the size of a cardboard mouthpiece. The mouthpiece is made of a pressed fibrous material and includes a filter member, which is arranged on the tobacco rod side, which is integral with the tubular portion of the mouthpiece and which is made in the shape of a continuous cylinder having a diameter equal to that of the mouthpiece tubular portion. The tobacco rod is connected to the mouthpiece by a paper ring.

Abstract: A filter for a cigarette and a filter cigarette which make a smoking feeling much milder without the original cigarette taste and aroma being spoiled are provided. The cigarette filter has a filter rod 8 having an air permeable peripheral surface, and 3 to 12 axial passages 12 in the rod 8. These passages 12 are distributed on a ring having a diameter of 50 to 70% of that of the rod and have a diameter of 0.1 to 0.7 mm. The wall of the axial passages 12 have air permeability. In smoking, ventilation air introduced into the passages 12 dilutes the smoke stream from the cigarette.

Abstract: A device for minimizing cigarette sidestream smoke and reducing the free-burn rate of a burning cigarette, the device comprises: I) a non-combustible tubular element (12) encasing an effective length of a tobacco charge (22) of a cigarette (14) located in a tubular element; and II) the tubular element having a means for both minimizing sidestream smoke emission from a burning tobacco charge and reducing free-burn rate of such burning tobacco charge to increase the number of puffs from the burning tobacco charge.

Abstract: Disclosed herein is a filter for use with tobacco products, such as cigarettes, cigars and pipes, which selectively absorbs toxic compounds and carcinogenic polynuclear aromatic compounds passing through it, but which permits most low molecular weight species, and in particular nicotine, to pass through. The filter is made from a middle-density polyurethane foam which is pre-treated to increase the number of binding sites for polynuclear aromatic compounds.

Abstract: A smoking article includes at least one strip of heat conducting material extending from one end of the tobacco rod of a smoking article to the opposite end of the tobacco rod. Preferably, the strip of material is at the interface between the tobacco rod and the cigarette paper and extends substantially from the lighting end of the tobacco column to at or near the attachment of a filter to the tobacco column.

Abstract: The invention refers to a ventilated filter cigarette comprising a tobacco rod, a wrapper for the tobacco rod and a filter ventilated through ventilation openings, including a coaxial filter element, comprising a filter core, a wrapper for the filter core, a filter jacket and a wrapper for the filter jacket, in which the material specifications of the tobacco rod and the filter and the dimensions of their individual components are designed to allow the smoke to flow mainly through the filter core (upon open ventilation zone) and when covering the ventilation openings, the smoke of the cigarette flows to a major degree through the filter jacket of the coaxial filter element.

Abstract: A device comprising a filter and a rod which is capable of insertion into a cigarette cord that has a preformed conduit extending concentrically along the longitudinal axis of the cord. The rod having a plurality of perforations along its entire length, allowing for a fresh air supply to be sucked into the rod and then intermingled through the tobacco. The filter being available in various numbers of filtering ring elements which allow for a selection of filtering strength. The device is made of materials that would allow it to be reusable. As the cigarette cord burns down, the increased supply of fresh air will result in a reduction in the percentages of particulate matter (tars, nicotine,etc). By varying the number of filters, the taste will selectively be controlled by the user.

Abstract: A smoking article and its method of construction and operation to provide products of combustion which are used to form flavorable aerosol gases delivered to the smoker's mouth while controlling the composition of such gases of combustion. Hot gases generated in a catalytic section in which fuel and air combust aided by a honeycomb catalytically coated surface including alumina and a cerium compound.

Abstract: A filter for passing tobacco smoke or other gaseous material comprising two layers of material having a plurality of circuitous or serpentine passageways forming pathways through which tobacco smoke travels a distance greater than the length of the filter itself. The filter is constructed by coating the layers with an adhesive except in the areas forming the passageways so that when the two layers are fastened together, there are unobstructed paths through the layers of material. The combined layers are rolled into a cylindrical construct. In an alternative embodiment, one or more cavities are formed along the passageways.

Abstract: A filter which will be attached to the end of a smoking product such as a cigarette. It would have a normal filter connected to the tube of tobacco, with a dual chamber which holds fine tobacco dust particles in one chamber. The other chamber would contain a plurality of loose fibers and would be connected to another normal cigarette filter.

Abstract: A cigarette smoke filter element is provided which permits a higher level of flavor to reach the smoker during initial smoking of the cigarette and consequently an enhanced flavor-to-tar ratio, by employing an elongate filter of microfine fibers which is provided with openings therethrough at the upstream end.

Abstract: A cigarette having an improved carbon-bearing filter. A cigarette is provided with a smokable rod attached to a filter element having a region of carbon-bearing cellulose acetate tow surrounding a substantially impermeable member in the form of a hollow plastic tube crimped at the upstream end. As a result, the carbon-bearing region transitions from a circular cross-section to an annular cross-section. A plurality of circumferentially arranged holes are provided in the filter to permit dilution of the smoke passing through the filter. The resulting filter element provides reduction in gas phase components of smoke, dilution by ambient air and acceptable drawing characteristics.

Abstract: A method for forming successive spaced crimps in a tow of fibrous material by passing the tow along a path defined by an apparatus comprising a plurality of crimping wheels disposed around the path, each wheel including teeth having crimping surfaces and adjacent sealing surfaces which slide over one another during crimping to prevent material from being squeezed between the teeth thereby forming crimped sections with elongate edges which are substantially free of flashing connecting non-crimped sections. A second crimping step may be incorporated to form longitudinal grooves in alternate non-crimped sections. The rod-like member produced by these techniques may be overwrapped to provide pockets surrounding the crimped sections which may be filled with a smoke-modifying material, for example, activated charcoal particles. Discrete elements cut from the rod-like member may be used in cigarettes and the like such as in the production of filtered cigarettes.

Abstract: A concentric smoking filter in which the peripheral filter medium is a fibrous tow, such as fibrous cellulose acetate tow, and the core filter medium is a web material, such as paper, loaded with carbon particles, is provided. The filter improves the taste, particularly, of "ultra-light" cigarettes.

Abstract: A cigarette includes a filter element including a carbon-containing paper or a paper containing molecular sieves. The paper contacts the filter material, such as cellulose acetate tow, within the filter element, either by circumscribing the filter material or by being gathered with non-carbon-containing filter material. The paper is useful as a plug wrap for a filter element. In several embodiments, longitudinal grooves are provided on the periphery of the filter element.

Abstract: A cigarette having a region having means to reduce the vapour phase constituents of tobacco smoke, such as carbon, surrounding a tobacco smoke flow path is provided with ventilation means to channel the tobacco smoke away from the vapour phase constituent reducing region. The vapour phase constituent reductions achieved are greater than the reduction which would be expected in view of the degree of ventilation to which the cigarette is subjected.

Abstract: A high level of flavour can be provided in cigarette smoke at a low tar level while providing a more uniform delivery of flavour and tar as the cigarette is smoked, in comparison to a conventional cigarette. A tobacco blend is employed using higher-than-normal quantities of tobacco from the upper levels of a tobacco plant, to provide an initial high flavour-to-tar ratio. A flavour reset technique is employed to attenuate the flavour strength of the smoke to the smoker, so that such attenuated but acceptable flavour level is provided at a much lower tar level. In addition, latter puff manipulation of the tobacco smoke is effected to decrease the flavour level and tar produced in the latter puffs of smoking to provide a more uniform flavour delivery. Filter element structures and other specific elements to achieve these results are described.

Abstract: A tobacco smoke filter element (14) produces a more uniform tar delivery profile without an unacceptable pressure drop by causing the cigarette smoke to assume a progressively longer flow path through an outer cylinder (20) of higher flow resistance filter tow material before passing radially inwardly through a cylinder (24) of microfine fibres into a low resistance flow path (26) to the smoker's mouth. The progressively increased flow path results from progressive clogging of the cylinder of microfine fibres by filtered material as smoking of the cigarette progresses.

Abstract: A vented filter cigarette with a filter having a fiber filter material and a plug wrap paper wrapping the fiber filter material, a tobacco rod, and tipping paper having a plurality of pores and connecting the filter and the tobacco rod. An embossment is formed in a region of the plug wrap paper corresponding to the pores of the tipping paper. The embossment creates a slight gap between the tipping paper and the circumference of the filter around the pores, with the result that the tightness between the tipping paper and the circumference of the filter is loosened, the filter ventilation is increased, and the variation in the filter ventilation is decreased.

Abstract: An improved flavored cigarette is provided which consists of a cylindrical paper sheet wrapper. Processed tobacco is disposed within the cylindrical paper sheet wrapper. A filter is at one end that is intended to be inserted in the mouth of a smoker. A structure is for supplying a flavor to sweeten the breath of the smoker, when the smoker uses the cigarette in a normal manner.

Abstract: A smoking article having a controlled yield of wet particulate matter and a method of making a smoking article with predetermined total and per puff yields of wet particulate matter. The smoking article has a tobacco rod connected to an air ventilated compound filter having two abutted filter segments, a rod end segment with a passage therethrough and a mouth end segment. The pressure drop of the abutment interface between the segments is selected to be in a range of from about 10 mm to about 100 mm water gauge. The total pressure drop of the filter including the interface and the amount of air dilution can be selected to provide a smoking article with a level per puff yield or a decreasing per puff yield.

Abstract: A lightweight cigarette filter including a filter element containing filter material having a total Denier of less than 35,000 or a bulk density of less than 0.12 gcm.sup.-3 in which part of the volume of the filter is occupied by a space filler impervious to smoke flow therethrough and the bulk density of which is less than the bulk density of the equivalent amount of filter material which it replaces.

Abstract: A cigarette filter connected to a tobacco rod is provided with air dilution holes which extend radially into the fibrous material of the filter to a depth of about 1.0 to about 4.0 millimeters. When a smoker draws on the cigarette, air admitted into the air dilution holes flows to a central or core region of the filter and thence to the smoker's mouth. Mainstream smoke from the tobacco rod flows into the filter and is diverted to an annular region surrounding the core region.

Abstract: A cigarette includes a rod of smoking material, such as tobacco, to which is attached a mouthpiece that is substantially impervious to air and smoke except for an unfiltered axial bore or flow passage which extends through the mouthpiece. Unfiltered smoke flows from the rod to the interface between the rod and mouthpiece where it is substantially diluted with air and passes through the flow passage for delivery as unfiltered, air diluted smoke. The air dilution reduces the gas phase components of the unfiltered smoke thereby providing a smoother, better tasting cigarette.

Abstract: A smoking article comprising tubular support means to carry a supply of smoking material therein and to provide first and second ends thereof, said first end being located for ignition and said second end being directed towards filter means attached to said tubular support, said filter means including a transversely extending barrier located in a collection zone and on which particulate matter in the smoke from the smoking material is deposited when said second end is ignited and smoke is drawn through the smoking material to the filter means, and heating means for raising the temperature of said collection zone above that which would exist in the absence of said temperature raising means to raise the temperature of said smoke from said smoking material entering said zone and particulate material deposited on said transversely extending barrier, to release semi-volatile compounds therefrom.

Abstract: A concentric smoking filter in which the peripheral filter medium is a fibrous tow, such as fibrous cellulose acetate tow, and the core filter medium is a web material, such as paper, loaded with carbon particles, is provided. The filter improves the taste, particularly, of "ultra-light" cigarettes.

Abstract: Cigarettes include a filter element which have a gathered web of paper incorporating a carbonaceous material. The paper is gathered so as to include a plurality of longitudinally extending channels, and the channels provide a cross-sectional void area of about 5 to about 30 percent of the filter element.

Abstract: Disclosed are articles, such as smoke filters, which contain fibers that have complex geometry in combination with tobacco smoke modifying agents such as flavorants. The fibers are preferably made of a polyester such as poly(ethylene terephthalate) and preferably are capable of spontaneously transporting water or n-decane on their surfaces. The articles of the invention result in improved delivery of the tobacco smoke modifying agent to the user.

Abstract: A smoking article includes a fuel rod coaxially aligned with and circumscribing two insulating tubes of different heat transfer coefficients wherein the inner most insulating tube is filled with an aerosol generating composition including flavor vaporizing materials therein.

Abstract: The present invention provides improved cigarettes and other smoking articles in which the substrate is a cellulosic material, preferably paper or a paper-like material, e.g., tobacco paper. The substrate of the present invention is used to retain flavorants and the aerosol forming materials, which upon exposure to heated air passing through the aerosol generating means during smoking, are vaporized and delivered to the user as a smoke-like aerosol.

Abstract: A cigarette filter having a core of synthetic fibrous filter material and an outer plug wrap is provided with a group of longitudinal bores and a group of peripheral channels in the core to improve the filtration efficiency and to balance the distribution of smoke flow over the cross-sectional area of the filter.

Abstract: A cigarette filter 12 comprises a rod of filter material having an inner zone 16 of 60% to 90% filter efficiency and an outer zone 18 of 10% to 40% filter efficiency, the inner zone occupying from 30% to 60% of the cross-sectional area of the filter. The filter is attached to a tobacco rod 10 by a tipping 14 having perforations 24 admitting air into the filter.

Abstract: A filter applicable to a cigarette and fitted therein by a user includes an elongated part fitted in a mouth provided in a cigarette and a flange which seals the cigarette mouth when the elongated part is inserted thereinto.

Abstract: A cigarette filter rod element including an axially extending barrier tube of micro-fine fibres with a diameter of between 0.5 and 10 microns and located so that at least part of the gas flow passes through the wall of said barrier tube.

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 filter mouthpiece for a smoking article comprises a rod end portion having a tube extending axially therethrough and a mouth end portion. The tube is open at each end and has perforations in its wall. The peripheral surface of the filter mouthpiece is rendered air permeable in at least one discrete area by means of perforations in an impermeable tipping, to admit air to the filter. When attached to a tobacco rod this filter mouthpiece provides a substantially constant dry particulate matter delivery throughout the smoking of the article.

Abstract: A cigarette filter rod comprising a filter element of fibrous material, the fibres of which extend longitudinally between a first end which is for attachment to a tobacco rod and a second end, and which surrounds a longitudinally extending tube member, one end of which is closed and is located at the first end of the filter element and the open end of which extends to the second end of the element, the wall of the tube being provided with one or more radially extending apertures adjacent to its closed end to promote radial flow through the fibres of the filter element adjacent the aperture or apertures and being dimensioned so that they remain open to allow flow communication through the wall of the tube throughout the period that a cigarette provided with the rod is smoked.

Abstract: The specification discloses a cigarette filter modifier and related method in which the pattern of tar and nicotine collection in a conventional cigarette filter is modified by the insertion into the filter of a hollow probe having laterally opening apertures therein which communicate with the interior passageway of the probe, combined with a base shield radiating from and surrounding said probe so as to block the passage of smoke, thereby forcing cigarette smoke to travel through the apertures and interior passageway of said probe. The probe apertures are located so that they open laterally with respect to the length of the probe.

Abstract: A smoking article having a valve system for closing off the flow of smoke to the user in response to an increase in temperature or humidity. The valve system includes a plastic body with a hollow valve chamber communicating with a smoke passage. A valve element is located in the chamber and is movable between a first position in which smoke from the smoking article is allowed to pass through the smoke passage and a second position in which the valve element closes the smoke passage thereby preventing smoke from passing therethrough. Expansion means are connected to the valve element and cause the valve to move between the first and second positions in response to the temperature or humidity of the smoke.

Abstract: The specification discloses a cigarette filter modifier and related method in which the pattern of tar and nicotine collection in a conventional cigarette filter is modified by the insertion into the filter of a hollow probe having apertures therein which communicate with the interior passageway of the probe, combined with a base shield radiating from and surrounding said probe so as to block the passage of smoke, thereby forcing cigarette smoke to travel through the apertures and interior passageway of said probe. The base shield is approximately the diameter of the cigarette, and its perimeter thereof defines the lateral extremes of the device so as to minimize its visibility.

Abstract: A baffle for filtering cigarette smoke is described. The baffle is inserted into commonly available cigarette holders. The cleansing and filtering action of the baffle system is augmented by the throttling of the smoke in successive chambers which were created by the walls of the baffle and the interior of the cigarette holder. The successive chambers are interconnected by orifices.

Abstract: 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.sup.-3, a passage extending within the rod and in gas-flow communication with the mouthpiece and the article comprising menthol or other vapor-release material at the mouthpiece and/or at a mouthpiece-end zone of the passage.The passage, which may extend substantially to the mouthpiece end of the rod, may be closed at the end thereof remote the mouthpiece end.The passage may be provided by a tube of combustible material or as a bore extending within said body of particles.A portion of the cross-section of the mouthpiece end of the rod not occupied by said passage may be in gas-flow communication with the mouthpiece. The mouthpiece may comprise a filter.

Abstract: Rods for use in the manufacture of smoking products are provided using a rod making apparatus equipped with a web preforming unit. A web of sheet-like material is passed through the web preforming unit and is pleated to form a rod-like composite. The rod-like composite then is circumscribed with wrapping material to provide a rod. The web preforming unit includes an outer frustoconical tube and an inner frustoconical member. The frustoconical member is concentric to the tube, and is positioned coaxially with respect to the tube such that an annular region is formed between the outer surface of the member and the inner surface of the tube.

Abstract: In order, when a cigarette is being smoked, to reduce, or even reverse, the tendency of the condensate-content to increase, a cigarette filter unit is proposed in which at least one partition having at least two areas of different porosities and made of a material which allows smoke to pass through it, is arranged between each two filter elements aligned axially with one another in the flow cross section of the filter unit. In this connection, a first partition area is designed in such a manner that its permeability decreases as the portion of tobacco associated with the cigarette filter unit is smoked, the tobacco smoke, passing through the said cigarette filter unit, flowing increasingly through the second partition area.

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 cigarette filter as well as a method and apparatus for making it is disclosed. The cigarette filter is rolled in first and second plug paper and then in tip paper. The first plug paper is comparatively thin and has a smooth surface. While the second plug paper is comparatively thick and has a plurality of holes or grooves preliminarily punched on its surface. By adequately rolling the filter in the first and second plug paper, a plurality of air channels are defined on the periphery of the filter so that smoke is inhaled by a smoker as if it is enclosed by air. The smoker can enjoy its light taste without jeopardizing a sense of smoking. The filter is made by a method comprising forming a continuous filter rod by rolling filter material in the first plug paper, rolling the filter rod in the second plug paper having a plurality of holes preliminarily punched and cutting the rod in a predetermined length so that a plurality of channels reaching the suction end are formed on the second plug paper.