Cigarette Paper Patents (Class 162/139)
  • Patent number: 4998542
    Abstract: A wrapper for smoking articles having controllable combustion characteristics. The wrapper comprises cigarette paper and an amorphous inorganic network formed from a gel.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: March 12, 1991
    Assignee: Philip Morris Incorporated
    Inventors: Andrew G. Kallianos, A. Clifton Lilly, Jr., Jerry F. Whidby, Rowland W. Dwyer, Jr.
  • Patent number: 4915118
    Abstract: A smoking article wrapper which when combined with a suitable tobacco column produces up to 75% less particulate sidestream smoke than do prior art cigarette paper wrappers and to methods of producing same. The paper conains freshly precipitated magnesium hydroxide filler precipitated by an equal or near equal stoichiometric addition rate process in the presence of the particulate magnesium hydroxide and/or calcium co-filler(s) and in the absence of the cellulosic pulp fibers.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: April 10, 1990
    Assignee: P. H. Glatfelter Company
    Inventors: Clifford M. Kaufman, Richard H. Martin
  • Patent number: 4805644
    Abstract: Sheet material especially useful in forming wrappers for smokeable articles such as cigarettes that results in reduced sidestream smoke. The sheet is formed by incorporating as a filler in a cellulosic web an amount of high (at least about 20 M.sup.2 /g) superficial surface area filler in the range generally of about 5 to 50 percent by weight in the finished sheet resulting in a web superficial surface area of at least about 80 M.sup.2 per square meter of web. The cellulosic material may be flax fiber or other natural cellulosic fibers conventionally used for such wrappers. Additional fillers may be used up to a total of about 50 percent, and burn modifier salts included. Examples of salts include the sodium or potassium salts of acids such as carbonic, formic, acetic, propionic, malic, lactic, glycolic, citric, tartaric, fumaric, oxalic, malonic, succinic, nitric, and phosphoric. The sheet can be formed by any conventional papermaking method.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: February 21, 1989
    Assignee: Kimberly-Clark Corporation
    Inventors: Vladimir Hampl, Jr., Robert D. Fields, Edward P. Bullwinkel
  • Patent number: 4590955
    Abstract: The present invention relates to smoking article wrappers having a non-ionic surfactant added to the wrapper. The non-ionic surfactant is added to the wrapper in an amount sufficient to reduce the amount of carbon monoxide produced upon burning of the wrapper.
    Type: Grant
    Filed: July 11, 1984
    Date of Patent: May 27, 1986
    Assignee: Olin Corporation
    Inventor: Ajit S. Dixit
  • Patent number: 4548677
    Abstract: The invention relates to a cigarette paper having the conventional burning additives and fillers containing from 20 to 50% by weight of bast fibres of fine fibrillation, with which a degree of grinding of at least 85 SR is produced. The cigarette paper produced according to this formulation has a pore structure which greatly promotes diffusion, in particular diffusion of carbon monoxide.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: October 22, 1985
    Assignee: B.A.T. Cigaretten-Fabriken GmbH
    Inventors: Werner Schneider, Dirk Pangritz, Walter Riedesser
  • Patent number: 4542755
    Abstract: An improved method of making reconstituted tobacco using a dry-forming process. Fiberized tobacco stems and scrap are combined with tobacco material of a fine particle size. The resulting tobacco mixture is conveyed in an airstream and deposited on a moving foraminous surface. An adhesive is incorporated into or applied to the web bonding the tobacco particles into a coherent sheet, and the sheet is dried if necessary. The dried sheet may be divided into leaflets or shredded for further processing as reconstituted tobacco. In preferred embodiments, cellulose fibers are mixed with the tobacco particles prior to web formation to impart increased sheet strength. In a further embodiment tobacco fines are mixed with the adhesive and applied to the web in the adhesive composition. Results obtained by means of the present invention include cost savings particularly in terms of reduced capital costs.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: September 24, 1985
    Assignee: Kimberly-Clark Corporation
    Inventors: William A. Selke, William F. Cartwright
  • Patent number: 4407308
    Abstract: A smoking article such as a cigarette has a rod of smoking material wrapped in a wrapper of which the substantially uniform air permeability due to viscous flow is not more than 3 and preferably not more than 2 Coresta Units and of which the Do/t value is in the range of 0.08 to 0.65 cm sec.sup.-1, preferably 0.15 to 0.25 cm sec.sup.-1. The length of the rod of smoking material may suitably be within a range of 25 to 55 mm. A reduction in sidestream TPM delivery of 40% or more can be obtained.The invention is also concerned with a smoking-article wrapper material which satisfies the above permeability and Do/t value requirements.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: October 4, 1983
    Assignee: British-American Tobacco Company Limited
    Inventors: Richard R. Baker, Federick J. Dashley
  • Patent number: 4238283
    Abstract: Humic acid-dyed paper suitable for use as wrappers for smoking articles is post treated with magnesium sulfate to fix or render the humic acid insoluble. Paper treated in this manner provides a product of acceptable brown color. Smoking articles wrapped in the treated paper evolve a reduced amount of carbon monoxide on smoking under normal conditions in comparison to currently available brown papers stained with humic acid.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: December 9, 1980
    Assignee: Philip Morris Incorporated
    Inventors: Randall K. Greene, Willard A. Geiszler, Jr.
  • Patent number: 4146041
    Abstract: The present invention relates to brown cigarette paper having reduced gas phase constituents during pyrolysis wherein the paper which has been stained with humic acid or salts thereof is further treated by washing with water in an amount effective to reduce the amount of water-soluble alkali metal salts present in the paper.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: March 27, 1979
    Assignee: Philip Morris Incorporated
    Inventor: Tibor S. Laszlo
  • Patent number: 4108151
    Abstract: Cigarette paper containing a filler of gamma alumina, for selectively reducing the organic vapor phase constituents in tobacco smoke. The paper is comprised of cellulosic fibers and a gamma alumina filler with the amount of alumina filler present being at least 50% by weight based on the weight of the paper. Preferably, the amount of gamma alumina filler will range from 50 to 80%. In addition to reducing organic vapor phase constituents, the paper has unique advantages over conventional cigarette paper wrappers in that the visible sidestream smoke eminating from the smoking article is reduced.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: August 22, 1978
    Assignee: Olin Corporation
    Inventors: R. Hugo Martin, William F. Owens, Jr.
  • Patent number: 4100396
    Abstract: Apparatus and method for electrically perforating a moving web such as paper, film and the like by passing the web between at least one electrically charged electrode and a ground electrode in a perforating unit, the charged electrode comprising a member adapted to rotate in a direction parallel to the direction of the moving web and connected to an intermittent high voltage source and the ground electrode comprising means adapted to move in a direction at right angles to the direction of rotation of the charged electrode.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: July 11, 1978
    Assignee: Olin Corporation
    Inventor: Richard Hugo Martin
  • Patent number: 4020850
    Abstract: A cigarette wrapper comprising a microporous sheet formed from a cellulose derivative binder filled with finely ground paper. The wrapper also includes a small amount of potassium nitrate. Such cigarette wrappers are effective to selectively reduce the nicotine delivery from normal cigarette tobacco blends.
    Type: Grant
    Filed: July 17, 1975
    Date of Patent: May 3, 1977
    Assignee: Brown & Williamson Tobacco Corporation
    Inventor: Philip Hancock Cogbill, II
  • Patent number: 3930935
    Abstract: An elongated web of paper is treated to render it especially suitable for being gathered transversely and wrapped to make cigarette filters. The treatment includes passing the web through the bight between a pair of rotating rolls provided with intermeshing ribs that do not contact one another and which are arranged generally in planes parallel to their axis of rotation so that the paper is stretched longitudinally in successive transverse areas whereby the paper fibers are loosened and exposed in such areas without complete destruction of the longitudinal continuity of the web.
    Type: Grant
    Filed: November 29, 1973
    Date of Patent: January 6, 1976
    Assignee: Celfil Company Establishment
    Inventors: Paul Adolf Muller, Hans Muster