R.j. Reynolds Tobacco Company

E.i. Dupont De Nemours and Company

Russell D Barnes

Loyd G Kasbo

Chandra K Banerjee

Henry T Ridings

William F Cartwright

Richard L Blakley

Donald F Durocher

Carmen P Digrigoli

Evon Llewellyn Crooks

Jack F Clearman

Fred R Radwanski

Gary R Shelar

Thomas L Gentry

Lloyd Harmon Hancock

James W Pryor

Charles Ray Ashcraft

Milly M Wong

Hoyt Sturdivant Beard

Jeffery S Gentry

Leon E Chambers, Jr

Edward P Bullwinkel

Robert G Geer

Karen M Womble

Ford Mitchell Shore

Hugh E Redick

Dale Bowman Poindexter

Keith Rowan Guy

Peter E Brighenti

Kelly K Hutchison

Harold Eugene Richardson

Ricky Harris Laurence

Benjidawn Morgan

Juanilla M Gwyn

Donald A Calleson

Douglas Edwin Wilhelm

Tony Dean Stewart

Cigarettes are manufactured using modified automated cigarette making apparatus. Those cigarettes possess smokable rods having paper wrapping materials having additive materials applied thereto as patterns. The additive materials, which can have the forms of liquid or paste formulations, are applied to a continuous paper web on the cigarette making apparatus. The formulation is applied to the paper web using application apparatus possessing rollers, and one of those rollers has a series of pockets in its roll face to receive additive formulation from a reservoir and to define the pattern of the formulation on the paper. A modified figure rail assembly and garniture entrance cone provide air flow toward the paper web being advanced through the garniture region of the cigarette making apparatus. Downwardly directed air exiting a plurality of air outlets in the finger rail create a zone of air turbulence the advancing paper web to maintains the paper web a distance away from the upper surface so that the additive material is retained on the paper web. Air exiting slots in the upper or top face of the garniture entrance cone also assist in maintaining the paper web away from the finger rail assembly. A radiant dryer is used to dry the additive material that has been applied to the paper web. The radiant dryer is located on one component of a two component assembly that is used to manufacture cigarettes. A first component of the two component assembly provides a source of paper web, applies additive material to that web in a pattern and dries the paper web; while a second component receives the paper web, supplies tobacco filler and manufactures a cigarette rod from the paper web and tobacco filler. Spectrometric techniques are used to ensure proper registration of the additive material on the cigarette rods so manufactured, and to ensure proper quality of those cigarettes.

Garniture web control

A method of and an apparatus for expanding tobacco, particularly tobacco impregnated with solid carbon dioxide are disclosed. The apparatus comprises an arcuate, generally C-shaped duct for conveying the tobacco material in a hot gaseous medium to sublimate the solid carbon dioxide and expand the tobacco. The duct has a non-circular cross-section, preferably a rectangular cross-section, with a high width-to-depth ratio and an increasing depth from the inlet to an intermediate portion of the duct then a decreasing depth from the intermediate portion to the outlet of the duct. A winnower device infeeds the tobacco material into the duct adjacent the throat of a venturi section connected to the inlet of the conveying duct. A tangential separator with an adjustable baffle at the inlet thereof for controlling velocity in the separator is used to separate the expanded tobacco from the gaseous medium.

Method of and apparatus for expanding tobacco

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.

Cigarette filter

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.

Controlled delivery smoking article and method

A new substrate for cigarettes includes an overwrapped rod of gathered cellulose-based paper having an outer diameter of from about 4 mm to about 8 mm; wherein the paper has a basis weight in the range of about 10 g/m.sup.2 to about 90 g/m.sup.2 ; and the paper can include up to about 50 weight percent of one or more burn retardant hydrated salts. The substrate typically comprises an overwrapped rod of a gathered web of a nonwoven cellulosic material, having a length of about 10 mm; wherein the dry unit weight of the substrate rod is from about 20 mg to about 120 mg; and wherein the web of cellulosic material is embossed or scored prior to gathering, thereby providing a substrate rod with a pressure drop of from about 2 to about 40 mm of H.sub.2 O, under FTC conditions. When employed in a cigarette at a 10 mm length, the substrate is typically capable of generating an aerosol density of at least about 2000 Units for at least about 50% of the puffs, preferably for at least about 80% of the puffs (under 50/30 smoking conditions).

Cigarette with improved substrate

A wrapper for use in smoking articles such as cigarettes, and in particular, to a wrapper for smoking articles having a heat source, a physically separate aerosol generating means, and a mouthend piece. More specifically the invention relates to smoking articles which employ a substantially non-burnable paper used as an innerwrap and/or outerwrap which encircles at least a portion of the fuel element of such smoking articles.

Smoking article with improved wrapper

The present invention relates to an improved wrapper for a smoking article haviing a combustible fuel element encircled by an insulating layer and a physically separate aerosol generating means as well as to smoking articles employing such wrappers. The wrapper encircles at least a portion of the insulating layer for the fuel element and comprises a permeable sheet material which during burning of the fuel provides a coherent layer to assist in controlling the amount of peripheral air to the fuel element during smoking. Preferred smoking articles which employ the wrapper of the present invention have a short fuel element, a physically separate aerosol generating means including an aerosol forming material, an insulating material around the fuel element, a relatively long mouthend piece, and a combination of sheet materials as the wrapper comprising an innerwrap which after lighting of the fuel element burns away to a high permeability non-coherent ash and an outerwrap which upon lighting fuses to form a coherent ash which assists in controlling the amount of peripheral air to the fuel element during smoking.

The present invention relates to smoking articles having an improved mouthend piece. More specifically, it relates to cigarette-type smoking articles comprising a fuel element, a physically separate aerosol generating means including an aerosol forming material, and means for delivering the aerosol produced by the aerosol generating means to the user in the form of a mouthend piece, the mouthend piece including a nonwoven web segment formed from meltblown thermoplastic fibers or filaments, and a spacer member located between the aerosol generating means and the non woven web segment.

Smoking article with improved mouthend piece

The adhesion of pitch-based carbon fiber to organic resin is improved by treatment at room temperature with a gaseous atmosphere containing from 100 to 1000 parts per million of ozone.

Surface treatment of pitch-based carbon fibers

Growing community of inventors

Belews Creek, NC, United States of America

Russell D Barnes