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| Number | Title | Issue Date |
| 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 |
| 5633082 | Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom Sheath-core bicomponent fibers comprising a core of a low-cost, high strength, thermoplastic material, preferably polypropylene or polybutylene terephthalate, completely covered with a sheath formed of polyethylene terephthalate or a copolymer thereof are... | 05/27/1997 |
| 5620641 | Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom Sheath-core bicomponent fibers comprising a core of a low-cost, high strength, thermoplastic material, preferably polypropylene or polybutylene terephthalate, completely covered with a sheath formed of polyethylene terephthalate or a copolymer thereof are... | 04/15/1997 |
| 5607766 | Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom Sheath-core bicomponent fibers comprising a core of a low-cost, high strength, thermoplastic material, preferably polypropylene or polybutylene terephthalate, completely covered with a sheath formed of polyethylene terephthalate or a copolymer thereof are... | 03/04/1997 |
| 5509430 | Bicomponent fibers and tobacco smoke filters formed therefrom Sheath-core bicomponent fibers comprising a core of a low-cost, high strength, thermoplastic material, preferably polypropylene, completely covered with a sheath formed preferably of plasticized cellulose acetate, ethylene-vinyl acetate copolymer, polyvin... | 04/23/1996 |
| 5195543 | Balanced flow tobacco smoke filter 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... | 03/23/1993 |
| 4940470 | Single field ionizing electrically stimulated filter A single field ionizing electrically stimulated filter utilizing a non-conductive filter medium is charged by an electric field created between an ionizer space-apart from the upstream face of the filter media and an electrode placed in close proximity wi... | 07/10/1990 |
| 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 |
| 4853005 | Electrically stimulated filter method and apparatus An electrically stimuated filter assembly includes a filter unit in which an air gap is maintained between the filter medium and electrodes disposed on opposite sides of that medium, thereby preventing degradation of filter efficiency by humid filtered fl... | 08/01/1989 |
| 4822193 | Ink reservoir having continuous random sliver with stretch yarn An ink pen, particularly a roller type marker, includes a pen body provided with a fibrous body ink reservoir for holding ink, and a pen tip is provided on the pen body for drawing ink from the ink reservoir. The fibrous body ink reservoir is composed of ... | 04/18/1989 |
| 4784632 | Tobacco smoke filter and method and apparatus for making same A method and means for making an improved tobacco smoke filter is characterized by the production of longitudinally continuous grooves running from end-to-end in the peripheral surface of a smoke-impervious filter plug wrap with the grooves having a trans... | 11/15/1988 |
| 4747814 | Fiber separator Apparatus is disclosed for use in the manufacture of rod like elements, for example cigarette filters formed of filamentary tow, for dissipating conveying gas from a conduit through which the tow is conveyed pneumatically through a series of processing st... | 05/31/1988 |
| 4729808 | Ink reservoir having continuous random sliver with stretch yarn An apparatus for producing an ink reservoir material, the reservoir material itself, and a method for making the ink reservoir material, include use of false twist stretch yarn. The yarn is used together with a steam die heater to cause crimping of a yarn... | 03/08/1988 |
| 4675064 | Smoke filter having extended film overwrap and method and apparatus for fabricating same A tobacco smoke filter includes a smoke pervious rod of plastic material about which a smoke impervious plastic overwrap film is extruded. In the preferred embodiment, the overwrap and the rod are made of the same material, e.g., cellulose acetate. By usi... | 06/23/1987 |
| 4637409 | Tobacco smoke filter and method and apparatus for making same An improved tobacco smoke filter is characterized by longitudinally continuous grooves running from end-to-end in the peripheral surface of a smoke-impervious filter plug wrap. Smoke-impervious tipping surrounds the plug wrap to seal the grooves except fo... | 01/20/1987 |
| 4614199 | Smoke filter having extended film overwrap and method and apparatus for fabricating same A tobacco smoke filter includes a smoke pervious rod of plastic material about which a smoke impervious plastic overwrap film is extruded. In the preferred embodiment, the overwrap and the rod are made of the same material, e.g., cellulose acetate. By usi... | 09/30/1986 |
| 4594162 | Pleated filter and method and apparatus for fabricating same A filter for separating constituent components of fluids includes a plural-layer sheet-like member which is multiply pleated to provide layers of the same or different porosity or to provide structural support layers for pleating a soft or membrane-like f... | 06/10/1986 |
| 4579637 | Method and apparatus for separating impurities from low conductivity liquids A method and apparatus for removing particulate matter suspended in low conductivity liquids employs extrinsic ions to electrically charge suspended particles. A unipolar current of the extrinsic ions is passed through the flowing liquid to efficiently ch... | 04/01/1986 |
| 4552158 | Free air dilution smoke filter and method and apparatus for fabricating same An improved tobacco smoke filter is characterized by grooves defined in its outer periphery and extending to the smoke discharging end of the filter. The grooves are totally exposed to ambient air along their entire length and serve as open air dilution p... | 11/12/1985 |
| 4508525 | Method and apparatus for producing tobacco smoke filter having improved tar/carbon monoxide ratio A method and apparatus for producing 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, ... | 04/02/1985 |
| 4507107 | Filter manufacturing technique Method and apparatus for producing axially elongated, self-sustaining, dimensionally stable smoke rods or the like from filamentary tow by feeding the tow into a confined zone having a non-porous section and a porous section, simultaneously feeding gas un... | 03/26/1985 |
| 4499912 | Free air dilution smoke filter and method and apparatus for fabricating same An improved tobacco smoke filter is characterized by grooves defined in its outer periphery and extending to the smoke discharging end of the filter. The grooves are totally exposed to ambient air along their entire length and serve as open air dilution p... | 02/19/1985 |
| 4481959 | Filtering means A tobacco smoke filter comprising an axially elongate filtering core 4, and a plugwrap 2 in surrounding engagement with the core and extending axially therebeyond to define a recess 6, the outer surface of the plugwrap providing at least one channel 8 ext... | 11/13/1984 |
| 4423744 | Tobacco smoke filter contoured to provide undiluted air flow and method and apparatus for manufacturing same An improved tobacco smoke filter is characterized by an undiluted air passage formed between a smoke-impervious plug wrap and an air-impervious tipping wrap by loosely wrapping the tipping wrap about the plug wrap along a section of the filter extending f... | 01/03/1984 |
| 4391716 | Preferential wicking system Removal of a first liquid, such as water, from a tank containing a second liquid of lower specific gravity, such as diesel fuel, is achieved with a liquid trap chamber into which the first liquid is delivered by a primer wick and from which the first liqu... | 07/05/1983 |
| 4390031 | Tobacco filter Self-sustaining, dimensionally stable, axially elongated fibrous bodies of suitable cross-sectional size and shape for use as cigarette filters are produced from a bondable continuous filamentary tow of substantially continuous thermoplastic fibers. The f... | 06/28/1983 |
| 4357950 | Tobacco smoke filter having improved tar/carbon monoxide ratio 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 ... | 11/09/1982 |
| 4355995 | Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same A tobacco smoke filter is disclosed, which provides tobacco flavor enrichment of smoke passing therethrough. The filter comprises a reconstituted tobacco member formed from a coherent sheet of reconstituted tobacco which has been uniformly embossed with a... | 10/26/1982 |
| 4354889 | Ink reservoir element for use in a marking instrument, and method and apparatus for producing same An ink reservoir element for use in a marking instrument is disclosed, which combines good ink holding capacity and good ink release properties with a wide variety of inks. The ink reservoir element is formed from a coherent sheet of flexible thermoplasti... | 10/19/1982 |
| 4291711 | Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same A tobacco smoke filter is disclosed, which provides tobacco flavor enrichment of smoke passing therethrough. The filter comprises a reconstituted tobacco member formed from a coherent sheet of reconstituted tobacco which has been uniformly embossed with a... | 09/29/1981 |
| 4286005 | Ink reservoir element for use in a marking instrument, and method and apparatus for producing same An ink reservoir element for use in a marking instrument is disclosed, which combines good ink holding capacity and good ink release properties with a wide variety of inks. The ink reservoir element is formed from a coherent sheet of flexible thermoplasti... | 08/25/1981 |
| 4281671 | Production of tobacco smoke filters Tobacco smoke filters comprising a rod of tobacco smoke filtering material, such as cellulose acetate tow including a thread incorporated therein or a tape wrapped therearound, the thread or tape carrying a smoke-modifying agent, such as a flavoring mater... | 08/04/1981 |
| 4216706 | Manufacture of smoking articles A process and apparatus for producing filter cigarette tubes is disclosed. A string of filter plugs is advanced continuously in longitudinal abutting relationship to a separating and accelerating device comprising a rapidly rotating wheel having a pair of... | 08/12/1980 |
| 4198853 | Porosity measurement The present invention provides a method and apparatus for evaluating the porosity of a sheet material at a given value of gas flow or pressure drop (PD), with account being taken of the following relationship between the parameters of flow and PD: in whic... | 04/22/1980 |
| 4161823 | Circumference measuring gauge An improved circumference measuring device of the type comprising a tape curved to form a closed loop with the tape ends being attached to mounting members resiliently biased away from each other to tend to tighten the loop. A cam and follower system oper... | 07/24/1979 |
| 4085663 | Crimper assembly An improved crimper assembly for use in making crimped filter materials is disclosed. The improved features of the assembly include an insulated central heater block which incorporates a steam entrance housing. Also provided are side plate bearing blocks ... | 04/25/1978 |
| 4075936 | Method and apparatus for making tobacco smoke filter Tobacco smoke filters and methods and means for making same wherein the products have both internal and external cavities, with the external cavities being of a limited nature so as to provide a substantially smooth outer surface for attaching conventiona... | 02/28/1978 |
| 4064791 | Method and apparatus for making tobacco smoke filter Tobacco smoke filters and methods and means for making same wherein the products have an elongated annular intermediate member overwrapped with a conventional plug wrap, with discrete inner plugs of a length shorter than the intermediate member and offeri... | 12/27/1977 |
| 4059043 | Method and apparatus for making tobacco smoke filters Tobacco smoke filters and methods and means for making same wherein the products have a composite substantially cylindrical inner member formed from two semi-cylindrical inner elements and overwrapped with a common plug wrap. The composite inner member ha... | 11/22/1977 |
| 4055108 | Crimper assembly An improved crimper assembly for use in making crimped filter materials is disclosed. The improved features of the assembly include an insulated central heater block which incorporates a steam entrance housing. An anti-stuffing tube is provided in order t... | 10/25/1977 |
