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| Number | Title | Issue Date |
| 7240678 | Filtered cigarette incorporating an adsorbent material A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or mo... | 07/10/2007 |
| 6718987 | Smokers′ article 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... | 04/13/2004 |
| 6471754 | Purification system for tobacco-generated secondhand smoke A purification system for preventing secondhand tobacco smoke from reaching an ambient environment thereabout. Two components of the system include a smoke entrapment intake hood for aggregating the secondhand smoke and an electrostatic suction filter ass... | 10/29/2002 |
| 6422244 | Filter for a cigarette and filter cigarette 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 t... | 07/23/2002 |
| 6273095 | Cigarette filter which removes carcinogens and toxic chemicals 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 spe... | 08/14/2001 |
| 6206007 | Cigarette with a dual-structure filter A cigarette with a dual-structure filter includes a dual-structure filter having a first filter element and a second filter element arranged downstream of the first filter element, a tobacco rod arranged upstream of the filter, and a tip paper covering a ... | 03/27/2001 |
| 6119699 | Method and apparatus for the selective removal of specific components from smoke condensates A smoking article capable of delivering a regulated smoke composition to a smoker, includes: a) a combustible filler wrapped in a combustible sheath; and b) at least one affinity chromatographic filter unit designed to preferentially remove specific targe... | 09/19/2000 |
| 6062228 | Biodegradable filter material and method for its manufacture There is provided a biodegradable filter tow or filter material from renewable raw materials for the use as a tobacco smoke filter element of cigarettes, cigars or pipes as well as a method for preparing it, wherein fibers, films or foams prepared in an e... | 05/16/2000 |
| 5947126 | Environmentally disintegratable tobacco smoke filter rod A bundle of cellulose acetate fibers is bonded together with a water-soluble fiber-to-fiber bonding agent. The water-soluble fiber-to-fiber bonding agent may include 60-99 wt. % of a water-soluble binder and 40-1 wt. % of a plasticizer. As to the specific... | 09/07/1999 |
| 5758669 | Tobacco filters and production process thereof Water disintegratability of a tobacco filter is improved by incorporating a super absorbent resin into a tobacco smoke filter medium in a tobacco filter comprising a main constitutive element of the tobacco smoke filter medium, and a water-soluble polymer... | 06/02/1998 |
| 5746230 | Concentric smoking filter having discrete tow and web filter media A concentric smoking filter in which one of the filter media is a fibrous tow, such as fibrous cellulose acetate tow, and one of the filter media is a web material, such as paper, is provided. The filter improves the taste, particularly, of "ultra-light" ... | 05/05/1998 |
| 5718250 | Low gas phase filter for cigarettes 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 p... | 02/17/1998 |
| 5664586 | Tobacco smoke filters and filter rods therefor The invention provides a cigarette filter (1) the biodegradation of the material (3) which is assisted by the incorporation of swellable means in the filter so that upon exposure to moisture the volume of the filter is increased, preferably to the extent ... | 09/09/1997 |
| 5632286 | Crimped elements for cigarettes and the like and methods and apparatus for making same 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 ... | 05/27/1997 |
| 5497793 | Cigarette and soluble cigarette filter therefor A filter cigarette includes a tobacco smoke filter having a core of an expanded starch material which is biodegradable and readily soluble in water. The filter material is preferably formed of high amylose content cornstarch or potato starch extruded at a... | 03/12/1996 |
| 5178165 | Smokers disposable mouthpiece A filtered smoker's mouthpiece having three sections; means to hold a cigarette or cigar in line with a chamber holding a filter, and a mouth piece therefore, wherein the filter is originally of greater volume than the filter chamber and is flexible and c... | 01/12/1993 |
| 5150721 | Tobacco smoke filter material and process for production thereof 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 prior to spinning the filaments of the filter material.... | 09/29/1992 |
| 5107863 | Cigarette and filter therefor 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 ... | 04/28/1992 |
| 5092351 | Multi-layer filter cartridge 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 t... | 03/03/1992 |
| 5058608 | Filter cigarette 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 den... | 10/22/1991 |
| 5053066 | Nonwoven filter and method of manufacture A filter useful as a cigarette smoke filter is made by convergingly passing a flat restrained meltblown web successively through a heated zone and a trumpet to form a roving. The roving may be processed to make filters. The process results in stretch orie... | 10/01/1991 |
| 5012829 | Flavored cigarette filters, and methods and apparatus for making same 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 on... | 05/07/1991 |
| 4972853 | Cigarette filter rod elements and cigarettes incorporating such filter rod elements 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.... | 11/27/1990 |
| 4955397 | Cigarette A cigarette including a tobacco rod circumscribed by a metal foil wrapper and having a cylinder of carbon fuel surrounding the metal foil wrapper tobacco rod. An air permeable outer wrapper circumscribes the cylinder of carbon fuel. A filter plug is locat... | 09/11/1990 |
| 4869275 | Ultra-high filtration filter An ultra-high efficiency cigarette filter is formed from a web of entangled ultra-fine melt blown plastic fibers of extremely low bulk density, the fibers on average having a diameter in the range of 0.1 to 4 microns. The web is formed into a substantiall... | 09/26/1989 |
| 4821750 | Cigarette filters Skinless shaped articles having increased specific surface area and based on cellulose esters, including both solid and hollow fibers, can be produced with at least one surface having a striated or fibrous appearance and a cellular interior structure by e... | 04/18/1989 |
| 4807809 | Rod making apparatus for smoking article manufacture 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-... | 02/28/1989 |
| 4807647 | Ventilated cigarette filter 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-... | 02/28/1989 |
| 4798570 | Process for preparing filter rods An improved process for preparing fiber rods useful as cigarette filter tips comprises feeding a synthetic fiber tow through an air jet bulker directly into the garniture of a conventional cigarette filter making apparatus. The process allows production o... | 01/17/1989 |
| 4791943 | Cigarette filter unit and method for the production thereof 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... | 12/20/1988 |
| 4754766 | Tobacco 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 |
| 4735218 | Tobacco filter Tobacco filter using a smoke filter comprising a processed product of fruiting body of Bacidiomycetes of bracket fungus or its analogue or mycelium or processed product of the Bacidiomycetes. This filter is remarkably effective in adsorbing tar and nicoti... | 04/05/1988 |
| 4700724 | Smoking-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 |
| 4693265 | Cigarette filter having low visible staining 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 e... | 09/15/1987 |
| 4681125 | Mouthpiece for tobacco smoke article A tobacco smoke mouthpiece including a smoke impervious plug member having an upstream smoke inlet end and a downstream smoke outlet or mouth end with groove(s) in the periphery of the plug member extending from the inlet end to the mouth end, the plug me... | 07/21/1987 |
| 4677996 | Smoking article mouthpieces A cigarette filter element comprising at least one duct extending from one end to the other of the element, which element is operated on by a heated former moving relatively to it in a rotary fashion. The heated former serves to provide a cavity or annula... | 07/07/1987 |
| 4660579 | Tobacco 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 |
| 4655736 | Method of manufacturing a tobacco smoke filter A method of manufacturing tobacco smoke filter of filamentous material with at least one end thereof having a preselected fused area embedded in and over at least a portion of the cross-sectional area thereof having a preselected fused area extending over... | 04/07/1987 |
| 4646762 | Cigarette having a mouthpiece A smoking article, such as a cigarette, includes, in one advantageous embodiment, a generally cylindrical, hollow tubular mouth section located in coaxial abutment to one end of the tobacco column of the cigarette. The wall of the mouth section is fabrica... | 03/03/1987 |
| 4643206 | Cigarette filter A filter for a cigarette includes a porous filter rod having a capillary smoke passageway extending coaxially therethrough. The filter rod is circumscribed by a non-porous wrapper and the filter rod with the non-porous wrapper therearound is provided with... | 02/17/1987 |
