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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 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 |
| 4658838 | Filter cigarette having rotatable adjustment A smoking article in the form of a filter cigarette can have adjustable air dilution provided by alignment of perforations in the paper wrap of the tobacco rod, a band circumscribing the rod, and the tipping paper. The band is attached to the rod and the ... | 04/21/1987 |
| 4637410 | Cigarettes A cigarette comprises a tobacco rod of tobacco filler wrapped in a paper wrapper, the circumference of the rod being within a range of 10 mm to 19 mm and the free burn rate of the rod being within a range of 25 to 45 mg min-1. The cigarette may... | 01/20/1987 |
| 4631045 | Apparatus for producing a rod-like smoking article with secondary air channels A rod-like smoking article with a rod-like mouthpiece core at the mouth end of a tobacco rod, the entire periphery of said mouthpiece core being enveloped by an adhered wrapping paper which is suitable for contact with the lips and which overlappingly fol... | 12/23/1986 |
| 4621651 | Filter tip for a smoking product A filter tip for a smoking product comprised of a filter rod attached at one end to the smoking product. The filter rod is surrounded by a tip wrapping layer which terminates at a distance from the mouth end of the filter rod. The projecting end of the ro... | 11/11/1986 |
| 4616664 | Tobacco product A tobacco product such as a cigarette having a tobacco column within a combustible wrap and a filter plug located at one end of the tobacco column to filter constituents of the mainstream smoke. The filter plug is disposed within a layer of plug wrap whic... | 10/14/1986 |
| 4602647 | Ventilating tip for a smokable article A tip for a smokable article comprises a tubularly arranged covering material with an air-pervious ventilation zone, and also a tubular core which is within the covering material and which contains no filter material. The air-impervious tube wall of this ... | 07/29/1986 |
| 4587982 | Tipping assembly for an elongate smoking article A cylindrical filter element for a cigarette is wrapped in a ventilated tipping wrapper which is spaced from the filter element by a raised pattern of thermoplastic material printed on the inner surface of the wrapper. The pattern is designed to provide a... | 05/13/1986 |
| 4585016 | Expanded web of sheet material and method of making same A composite expanded web for making a cigarette wrapper is provided, the web comprising a laminate of a first web of generally flat sheet material and a second web of expanded sheet material. The expanded web is formed by passing a web of sheet material t... | 04/29/1986 |
| 4585015 | Cigarette filter A filter for a cigarette has a porous filter rod with a channel extending longitudinally through the filter rod. The end of the filter at the tobacco column of the cigarette includes a partition having an orifice therethrough of a smaller cross-sectional ... | 04/29/1986 |
| 4582072 | Cigarette filter 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 ... | 04/15/1986 |
| 4582071 | Tipping assembly for an elongate smoking article A cigarette is provided with a cylindrical ungrooved filter plug which is surrounded by a ventilated tipping wrapper spaced radially from the plug by a slotted sheet laminated to the inner surface of the tipping wrapper. The slots communicate with the ven... | 04/15/1986 |
| 4580584 | 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... | 04/08/1986 |
| 4574820 | Buccal end device for a smoking rod A cigarette with a tobacco rod (5,6) has at its buccal end a filter plug (10) and a hollow tubular core (8) with a cross wall (9) formed with orifices of a certain size and shape. Ventilating air drawn in through perforations (12) in a tipping wrapper (7)... | 03/11/1986 |
| 4570650 | Cigarette A cigarette has a front tobacco-containing part composed of a tubular member of cigarette paper and a tobacco filler, a rear part extending rearwardly from the front part and having a filter, and a tubular coating extending around at least one fourth of t... | 02/18/1986 |
| 4564030 | Cigarette filter assembly A cigarette filter assembly has a filter plug and an open mixing chamber arranged between the filter plug and the distal end of the filter assembly. Perforations are formed in the filter assembly wrapper to communicate between the mixing chamber and outsi... | 01/14/1986 |
| 4553556 | Cigarette having a corrugated wrapper A cigarette is provided which includes a corrugated wrapper. The corrugated wrapper is constructed such that the outer surface and the inner surface are separated by a distance which is less than the minimum transverse dimension of the tobacco rod. The co... | 11/19/1985 |
| 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 |
| 4550740 | Mouthpiece for a cigarette and a cigarette having same A mouthpiece adapted to be attached to a smoking article, such as a cigarette, includes, in one advantageous embodiment, an air impermeable core member of smaller diameter than the tobacco column to which it is to be coaxially located and a generally cyli... | 11/05/1985 |
| 4545391 | Cigarette filter A filter for a cigarette includes a smoke impermeable core of generally cylindrical shape and a smoke permeable material overlaying at least a portion of the periphery of the core. The core with the overlaying permeable material is circumscribed by an air... | 10/08/1985 |
| 4535793 | Smoking article filters A ventilated filter element comprising a fibrous filter element wherein a plurality of equiangularly spaced apart grooves extend in a parallel fashion along the longitudinal axis of the filter element from the mouth end of the element for a distance less ... | 08/20/1985 |
| 4517996 | Ventilated filter and smoke dispersing mouthpiece 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 dive... | 05/21/1985 |
| 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 |
| 4498487 | Rod-like smoking article with secondary air channels and apparatus for producing such an article A rod-like smoking article with a rod-like mouthpiece core at the mouth end of a tobacco rod, the entire periphery of the mouthpiece core being enveloped by an adhered wrapping paper which is suitable for contact with the lips and which overlappingly foll... | 02/12/1985 |
| 4493331 | Cigarette filter A filter for a cigarette which includes a protrusion of smoke permeable material integral with and coaxially projecting from the mouth end of the filter rod. The mouth end of the filter rod surrounding the protrusion is smoke impermeable so that as the ci... | 01/15/1985 |
| 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 |
| 4480649 | Filter device This invention provides a cigarette filter comprising a filter core (2), a plugwrap (4) around the core, a profiled spacer wrap (6) around the plugwrap, and tipping material (8) around the spacer wrap, the profiled spacer wrap providing between the plugwr... | 11/06/1984 |
| 4476882 | Tobacco smoke filters A smoke filter for a smoking article (e.g. a cigarette) comprises a filter plug having an airflow duct whose floor extends along the filter plug from the mouth end of the plug such that the end of the duct remote from the mouth end is deeper than the end ... | 10/16/1984 |
| 4424819 | Cigarette filter A filter for a cigarette includes a porous filter rod circumscribed by a non-porous or air impermeable wrapper, and ventilating air grooves embedded in the wrapped filter rod which extend from one end of the filter rod a preselected distance generally lon... | 01/10/1984 |
| 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 |
| 4413641 | Cigarette mouthpiece A mouthpiece for a filter-tipped smoking product or a filtered cigarette holder which has an inlet end adjacent the mouth end of the filter and an outlet end opposite the inlet end through which smoke may leave the cigarette or cigarette holder for passag... | 11/08/1983 |
| 4387728 | Cigarette filter A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper wherein the filter rod with the non-porous wrapper therearound is provided with grooves extending from one end thereof a preselected distance longitudinally therea... | 06/14/1983 |
| 4366826 | Smoke filtration 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 comp... | 01/04/1983 |
| 4362172 | Cigarette filter A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper and a tipping material having selected openings therein for allowing ventilating air to pass therethrough. Spacing members are disposed between the non-porous wrap... | 12/07/1982 |
| 4338956 | Cigarette filter A filter for a cigarette includes a porous filter rod circumscribed by a smoke impervious wrapper wherein the filter rod with the smoke impervious wrapper therearound is provided with grooves embedded therein and extending from one end thereof a preselect... | 07/13/1982 |
| 4331165 | Ventilated cigarettes Ventilated cigarettes are made by perforating the wrapper of each filter over an area which lies within pre-formed perforations in the uniting band joining the filter to the tobacco rod. The filter wrappers may be perforated by pins on a rolling plate and... | 05/25/1982 |
| 4281591 | Production of cigarette filter units The invention concerns a method for producing a cigarette filter unit, in which filter elements are disposed on a porous or perforated covering strip and at least partially wrapped thereby and adhesively joined. The adhesive substance is applied to the co... | 08/04/1981 |
| 4059121 | Filter for tobacco smoke A tobacco smoke filter comprising a single filter element consisting wholly of a plurality of randomly-oriented non-crimped smooth-surfaced solid fibers of thermoplastic polymeric non-absorbent material, each of the fibers having a uniform diameter less t... | 11/22/1977 |
