PH24991A - Smoking article with improved wrapper - Google Patents

Smoking article with improved wrapper

Info

Publication number
PH24991A
PH24991A PH37403A PH37403A PH24991A PH 24991 A PH24991 A PH 24991A PH 37403 A PH37403 A PH 37403A PH 37403 A PH37403 A PH 37403A PH 24991 A PH24991 A PH 24991A
Authority
PH
Philippines
Prior art keywords
smoking article
improved wrapper
wrapper
improved
smoking
Prior art date
Application number
PH37403A
Other languages
English (en)
Inventor
Russell Dean Barnes
Carmen Paul Digrigoli
Donald Francis Durocher
Loyd George Kasbo
Original Assignee
Reynolds Tobacco Co R
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reynolds Tobacco Co R filed Critical Reynolds Tobacco Co R
Publication of PH24991A publication Critical patent/PH24991A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A24B15/165—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes comprising as heat source a carbon fuel or an oxidized or thermally degraded carbonaceous fuel, e.g. carbohydrates, cellulosic material
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/18—Selection of materials, other than tobacco, suitable for smoking
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/22—Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Paper (AREA)
PH37403A 1987-08-25 1988-08-12 Smoking article with improved wrapper PH24991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/089,187 US4938238A (en) 1985-08-26 1987-08-25 Smoking article with improved wrapper

Publications (1)

Publication Number Publication Date
PH24991A true PH24991A (en) 1990-12-26

Family

ID=22216203

Family Applications (1)

Application Number Title Priority Date Filing Date
PH37403A PH24991A (en) 1987-08-25 1988-08-12 Smoking article with improved wrapper

Country Status (29)

Country Link
US (1) US4938238A (xx)
EP (1) EP0304766A2 (xx)
JP (1) JPS6471471A (xx)
KR (1) KR890003311A (xx)
CN (1) CN1021791C (xx)
AR (1) AR244957A1 (xx)
AU (1) AU609678B2 (xx)
BG (1) BG50823A3 (xx)
BR (1) BR8804274A (xx)
CA (1) CA1304648C (xx)
CZ (1) CZ279350B6 (xx)
DD (1) DD285713A5 (xx)
DK (1) DK471388A (xx)
EG (1) EG18828A (xx)
FI (1) FI883872A (xx)
HU (1) HU206034B (xx)
IL (1) IL87336A (xx)
IS (1) IS1493B (xx)
MA (1) MA21360A1 (xx)
MY (1) MY103383A (xx)
NO (1) NO167351C (xx)
OA (1) OA08902A (xx)
PH (1) PH24991A (xx)
PT (1) PT88333B (xx)
RO (1) RO103706B1 (xx)
RU (1) RU1795883C (xx)
SU (1) SU1837814A3 (xx)
YU (1) YU162088A (xx)
ZA (1) ZA885706B (xx)

Families Citing this family (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967774A (en) * 1989-10-11 1990-11-06 R. J. Reynolds Tobacco Company Smoking article with improved means for retaining the fuel element
US5103844A (en) * 1990-06-07 1992-04-14 R. J. Reynolds Tobacco Company Cigarette paper and cigarette incorporating same
US5396911A (en) * 1990-08-15 1995-03-14 R. J. Reynolds Tobacco Company Substrate material for smoking articles
US5415186A (en) * 1990-08-15 1995-05-16 R. J. Reynolds Tobacco Company Substrates material for smoking articles
US5065776A (en) 1990-08-29 1991-11-19 R. J. Reynolds Tobacco Company Cigarette with tobacco/glass fuel wrapper
US5105838A (en) * 1990-10-23 1992-04-21 R.J. Reynolds Tobacco Company Cigarette
US5348027A (en) * 1991-02-14 1994-09-20 R. J. Reynolds Tobacco Company Cigarette with improved substrate
US5203355A (en) * 1991-02-14 1993-04-20 R. J. Reynolds Tobacco Company Cigarette with cellulosic substrate
US5178167A (en) * 1991-06-28 1993-01-12 R. J. Reynolds Tobacco Company Carbonaceous composition for fuel elements of smoking articles and method of modifying the burning characteristics thereof
US5469871A (en) * 1992-09-17 1995-11-28 R. J. Reynolds Tobacco Company Cigarette and method of making same
US5345955A (en) * 1992-09-17 1994-09-13 R. J. Reynolds Tobacco Company Composite fuel element for smoking articles
PH30299A (en) * 1993-04-07 1997-02-20 Reynolds Tobacco Co R Fuel element composition
US5540242A (en) * 1993-07-07 1996-07-30 Brown & Williamson Tobacco Corporation Cigarette paper having reduced sidestream properties
US5546965A (en) * 1994-06-22 1996-08-20 R. J. Reynolds Tobacco Company Cigarette with improved fuel element insulator
US5533530A (en) 1994-09-01 1996-07-09 R. J. Reynolds Tobacco Company Tobacco reconstitution process
ES2148549T3 (es) * 1994-09-07 2000-10-16 British American Tobacco Co Articulos para fumar.
BR9906794A (pt) 1998-01-06 2002-01-02 Philip Morris Prod Cigarro possuindo fluxo de fumaça reduzido
TW536395B (en) 1998-04-16 2003-06-11 Rothmans Benson & Hedges Cigarette sidestream smoke treatment material
US6390291B1 (en) 1998-12-18 2002-05-21 Smithkline Beecham Corporation Method and package for storing a pressurized container containing a drug
US20030209453A1 (en) * 2001-06-22 2003-11-13 Herman Craig Steven Method and package for storing a pressurized container containing a drug
US6314964B1 (en) 1999-09-15 2001-11-13 Schweitzer-Mauduit International, Inc. Cigarette paper containing carbon fibers for improved ash characteristics
US20040089561A1 (en) * 1999-11-23 2004-05-13 Herman Craig Steven Method and package for storing a pressurized container containing a drug
GB9928853D0 (en) * 1999-12-07 2000-02-02 British American Tobacco Co Improvements relating to smoking articles
GB0015043D0 (en) * 2000-06-21 2000-08-09 Glaxo Group Ltd Medicament dispenser
AU9156701A (en) * 2000-09-18 2002-04-02 Rothmans Benson Low sidestream smoke cigarette with combustible paper
ES2388777T3 (es) * 2000-11-13 2012-10-18 Schweitzer-Mauduit International Envolvente de papel y artículo de fumar con características de reducida tendencia a la ignición
BR0308465B1 (pt) * 2002-03-15 2012-11-27 cigarro de fumaça de baixo fluxo lateral apresentando um bastão de tabaco convencional e um papel de tratamento combustìvel.
AU2003266044A1 (en) * 2002-09-13 2004-04-30 Rothmans, Benson And Hedges Inc. Ceria/zirconia fibres for use in cigarettes
US9675109B2 (en) * 2005-07-19 2017-06-13 J. T. International Sa Method and system for vaporization of a substance
US11647783B2 (en) 2005-07-19 2023-05-16 Juul Labs, Inc. Devices for vaporization of a substance
US10188140B2 (en) 2005-08-01 2019-01-29 R.J. Reynolds Tobacco Company Smoking article
US20070215167A1 (en) 2006-03-16 2007-09-20 Evon Llewellyn Crooks Smoking article
DE102006009995B3 (de) * 2006-03-03 2007-08-30 NjoyNic Ltd., Glen Parva Feuerzeug zum Aufheizen einer rauchfreien Zigarette
US9220301B2 (en) 2006-03-16 2015-12-29 R.J. Reynolds Tobacco Company Smoking article
RU2384280C1 (ru) * 2006-04-11 2010-03-20 Джапан Тобакко Инк. Углесодержащая композиция нагревателя негорючего курительного изделия и негорючее курительное изделие
US7726320B2 (en) 2006-10-18 2010-06-01 R. J. Reynolds Tobacco Company Tobacco-containing smoking article
EP1972215A1 (de) * 2007-03-20 2008-09-24 Wedegree GmbH Rauchfreies Zigarettenersatzprodukt
CN101581060B (zh) * 2008-05-16 2013-03-13 印莫格不动产采购有限责任公司 一种香烟包裹材料及香烟
US8464726B2 (en) 2009-08-24 2013-06-18 R.J. Reynolds Tobacco Company Segmented smoking article with insulation mat
US9034106B2 (en) * 2010-03-26 2015-05-19 Philip Morris Usa Inc. Smoking article including alkanoylated glycoside
JP5976637B2 (ja) 2010-05-06 2016-08-23 アール・ジエイ・レイノルズ・タバコ・カンパニー セグメント化喫煙物品
US8424538B2 (en) 2010-05-06 2013-04-23 R.J. Reynolds Tobacco Company Segmented smoking article with shaped insulator
US9149072B2 (en) 2010-05-06 2015-10-06 R.J. Reynolds Tobacco Company Segmented smoking article with substrate cavity
US8839799B2 (en) 2010-05-06 2014-09-23 R.J. Reynolds Tobacco Company Segmented smoking article with stitch-bonded substrate
US9301546B2 (en) 2010-08-19 2016-04-05 R.J. Reynolds Tobacco Company Segmented smoking article with shaped insulator
RU2544152C1 (ru) * 2011-03-29 2015-03-10 Джапан Тобакко Инк. Несжигаемое табачное изделие вдыхательного типа
KR20240001273A (ko) 2011-08-16 2024-01-03 쥴 랩스, 인크. 저온 전자 증발 장치 및 방법
WO2013043299A2 (en) 2011-09-20 2013-03-28 R.J. Reynolds Tobacco Company Segmented smoking article with substrate cavity
US9491970B2 (en) * 2011-12-21 2016-11-15 Japan Tobacco Inc. Paper tube and flavor inhaler
JP6143784B2 (ja) * 2011-12-30 2017-06-07 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 消費量を監視及びフィードバックするエアロゾル発生システム
GB201200558D0 (en) * 2012-01-13 2012-02-29 British American Tobacco Co Smoking article
KR102154113B1 (ko) * 2013-08-13 2020-09-10 필립모리스 프로덕츠 에스.에이. 이중 열 전도 요소 및 개선된 기류를 갖는 흡연 물품
US9788571B2 (en) 2013-09-25 2017-10-17 R.J. Reynolds Tobacco Company Heat generation apparatus for an aerosol-generation system of a smoking article, and associated smoking article
GB201320231D0 (en) * 2013-11-15 2014-01-01 British American Tobacco Co Aerosol generating material and devices including the same
CN104522882B (zh) * 2014-11-05 2017-10-10 中国烟草总公司郑州烟草研究院 一种利用纸加热的加热非燃烧型烟草制品
US10154689B2 (en) 2015-06-30 2018-12-18 R.J. Reynolds Tobacco Company Heat generation segment for an aerosol-generation system of a smoking article
US20170055576A1 (en) 2015-08-31 2017-03-02 R. J. Reynolds Tobacco Company Smoking article
US10165799B2 (en) 2015-11-17 2019-01-01 Altria Client Services Llc Aerosol-generating system with self-activated electric heater
JP6860584B2 (ja) * 2015-11-17 2021-04-14 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 自己起動式電気ヒーターを備えたエアロゾル発生システム
US10314334B2 (en) 2015-12-10 2019-06-11 R.J. Reynolds Tobacco Company Smoking article
US11744296B2 (en) 2015-12-10 2023-09-05 R. J. Reynolds Tobacco Company Smoking article
US11717018B2 (en) 2016-02-24 2023-08-08 R.J. Reynolds Tobacco Company Smoking article comprising aerogel
CN107348561B (zh) 2016-05-10 2021-11-02 韩力 一种吸烟制品用微爆微囊及包含该微爆微囊的吸烟制品
RU2732766C2 (ru) 2016-05-31 2020-09-22 Филип Моррис Продактс С.А. Система, генерирующая аэрозоль, содержащая нагреваемое изделие, генерирующее аэрозоль
US10952472B2 (en) 2016-05-31 2021-03-23 Altria Client Services Llc Heat diffuser for an aerosol-generating system
MX2018014390A (es) 2016-05-31 2019-03-14 Philip Morris Products Sa Articulo generador de aerosol con difusor de calor.
US10918135B2 (en) 2016-05-31 2021-02-16 Altria Client Services Llc Heat diffuser for an aerosol-generating system
EP3462933B1 (en) * 2016-05-31 2021-11-10 Philip Morris Products S.A. Heat diffuser for an aerosol-generating system
US10660368B2 (en) 2016-05-31 2020-05-26 Altria Client Services Llc Aerosol generating article with heat diffuser
CN108113051B (zh) * 2017-12-07 2019-03-12 共青城道乐投资管理合伙企业（有限合伙） 一种加热不燃烧卷烟滤嘴和加热不燃烧卷烟
US20190254335A1 (en) 2018-02-22 2019-08-22 R.J. Reynolds Tobacco Company System for debossing a heat generation member, a smoking article including the debossed heat generation member, and a related method
US11432581B2 (en) 2018-09-07 2022-09-06 Altria Client Services Llc Capsule containing a matrix, device with the matrix, and method of forming the matrix
US20200128880A1 (en) 2018-10-30 2020-04-30 R.J. Reynolds Tobacco Company Smoking article cartridge
US12022859B2 (en) 2019-07-18 2024-07-02 R.J. Reynolds Tobacco Company Thermal energy absorbers for tobacco heating products
WO2021205368A1 (en) * 2020-04-07 2021-10-14 Swm Luxembourg Non-combustible wrapper for use in heat but not burn applications
KR102431771B1 (ko) * 2020-05-11 2022-08-11 주식회사 케이티앤지 비연소형 궐련을 위한 래퍼 및 그의 제조방법

Family Cites Families (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US439004A (en) * 1890-10-21 Edward marshall harris
US198075A (en) * 1877-12-11 Improvement in asbestus cigarettes
US1581619A (en) * 1921-08-18 1926-04-20 Sulzberger Nathan Asbestos paper, etc.
US1770616A (en) * 1926-07-23 1930-07-15 Otho V Kean Cigarette
US1879128A (en) * 1929-10-16 1932-09-27 Ernest W Desper Cigarette
US2020646A (en) * 1933-08-14 1935-11-12 Hornstein Philip Wrapper paper for cigars, cigarettes, and the like
US2098619A (en) * 1936-02-29 1937-11-09 Charles S Finnell Cigarette
US2471116A (en) * 1945-02-21 1949-05-24 Michael P Newberger Cigarette shield
US2890704A (en) * 1954-11-10 1959-06-16 William R Lamm Cigarette
US2907686A (en) * 1954-12-23 1959-10-06 Henry I Siegel Cigarette substitute and method
US2998012A (en) * 1957-01-23 1961-08-29 William R Lamm Cigarette and wrapper therefor
US3106210A (en) * 1957-11-18 1963-10-08 Reynolds Metals Co Smoking tobacco
US3049449A (en) * 1960-03-29 1962-08-14 Minerals & Chem Philipp Corp Lightweight adsorbent clay product and method of making same
US3220418A (en) * 1962-03-05 1965-11-30 Samuel L Cohn Cigarette
US3258015A (en) * 1964-02-04 1966-06-28 Battelle Memorial Institute Smoking device
US3356094A (en) * 1965-09-22 1967-12-05 Battelle Memorial Institute Smoking devices
GB1185887A (en) * 1966-06-22 1970-03-25 Synectics Inc Smoking Article
US3419013A (en) * 1967-08-17 1968-12-31 Edward J. Calhoun Smoking article
US3516417A (en) * 1968-04-05 1970-06-23 Clayton Small Moses Method of smoking and means therefor
US3586005A (en) * 1968-10-14 1971-06-22 Reynolds Metals Co Metal coated cigarette paper
US3773053A (en) * 1972-01-24 1973-11-20 Philip Morris Inc Cigarette with controlled smoking profile
IE37524B1 (en) * 1972-04-20 1977-08-17 Gallaher Ltd Synthetic smoking product
US4044777A (en) * 1972-04-20 1977-08-30 Gallaher Limited Synthetic smoking product
US4044778A (en) * 1973-09-10 1977-08-30 Cohn Charles C Cigarettes
IT1013204B (it) * 1974-05-22 1977-03-30 Falchi Ennio Cartina per sigarette e procedimen to per ottenerla
US3911932A (en) * 1974-07-31 1975-10-14 Philip Morris Inc Control of smoking delivery through cigarette paper porosity
US4286604A (en) * 1976-10-05 1981-09-01 Gallaher Limited Smoking materials
JPS55501126A (xx) * 1978-12-11 1980-12-18
US4297139A (en) * 1979-03-26 1981-10-27 Corning Glass Works Inorganic gels and ceramic papers, films, fibers, boards, and coatings made therefrom
GB2064296B (en) * 1979-11-16 1983-06-22 Imp Group Ltd Cigarette or cigarette-like device which produces aerosol in smoke
US4391285A (en) * 1980-05-09 1983-07-05 Philip Morris, Incorporated Smoking article
US4461311B1 (en) * 1981-12-24 1991-07-02 Method and smoking article wrapper for reducing sidestream smoke
US4561454A (en) * 1982-01-15 1985-12-31 R. J. Reynolds Tobacco Smoking article having reduced sidestream smoke
US4433697A (en) * 1982-04-07 1984-02-28 Olin Corporation Wrapper for smoking articles and method
US4474191A (en) * 1982-09-30 1984-10-02 Steiner Pierre G Tar-free smoking devices
EP0117355B1 (en) * 1982-12-16 1991-03-20 Philip Morris Products Inc. Process for making a carbon heat source and smoking article including the heat source and a flavor generator
US4570650A (en) * 1983-07-28 1986-02-18 Vladimir Sirota Cigarette
US4615345A (en) * 1983-08-08 1986-10-07 Kimberly-Clark Corporation Wrapper constructions for self-extinguishing smoking articles
US4622983A (en) * 1983-08-08 1986-11-18 Kimberly-Clark Corporation Reduced ignition proclivity smoking article wrapper and smoking article
US4574821A (en) * 1984-03-22 1986-03-11 Philip Morris Incorporated Expanded wrapper and smoking articles including same
IE65680B1 (en) * 1984-09-14 1995-11-15 Reynolds Tobacco Co R Smoking article
IN166122B (xx) * 1985-08-26 1990-03-17 Reynolds Tobacco Co R
US4779631A (en) * 1987-03-06 1988-10-25 Kimberly-Clark Corporation Wrappers for specialty smoking devices

Also Published As

Publication number Publication date
PT88333B (pt) 1994-09-30
EG18828A (en) 1994-11-30
BG50823A3 (en) 1992-11-16
CZ279350B6 (cs) 1995-04-12
FI883872A0 (fi) 1988-08-22
FI883872A (fi) 1989-02-26
ZA885706B (en) 1989-04-26
RU1795883C (ru) 1993-02-15
DK471388A (da) 1989-02-26
SU1837814A3 (ru) 1993-08-30
CN1021791C (zh) 1993-08-18
OA08902A (en) 1989-10-31
US4938238A (en) 1990-07-03
JPS6471471A (en) 1989-03-16
NO167351C (no) 1991-10-30
BR8804274A (pt) 1989-03-21
IS1493B (is) 1992-07-30
DD285713A5 (de) 1991-01-03
KR890003311A (ko) 1989-04-14
AU609678B2 (en) 1991-05-02
EP0304766A2 (en) 1989-03-01
CA1304648C (en) 1992-07-07
IL87336A (en) 1992-05-25
MA21360A1 (fr) 1989-04-01
PT88333A (pt) 1989-06-30
NO883784D0 (no) 1988-08-24
AR244957A1 (es) 1993-12-30
NO167351B (no) 1991-07-22
NO883784L (no) 1989-02-27
HU206034B (en) 1992-08-28
AU2101688A (en) 1989-03-02
HUT50022A (en) 1989-12-28
RO103706B1 (en) 1993-12-23
IL87336A0 (en) 1989-01-31
IS3380A7 (is) 1989-02-26
DK471388D0 (da) 1988-08-23
MY103383A (en) 1993-06-30
YU162088A (en) 1990-04-30
CN1044391A (zh) 1990-08-08
CZ575588A3 (en) 1994-11-16

Similar Documents

Publication Publication Date Title
ZA885706B (en) Smoking article with improved wrapper
IL87631A (en) Smoking articles
IL91019A (en) Smoking article
ZA895571B (en) Smoking article
IL92128A0 (en) Smoking article
GB8419826D0 (en) Smoking article wrapper/article
ZA886485B (en) Smoking articles
GB8419827D0 (en) Wrapper constructions/smoking articles
GB8722309D0 (en) Smoking articles
ZA896325B (en) Smoking article
PL279423A1 (en) Smoking article
GB8822975D0 (en) Improvements relating to smoking articles
GB8827129D0 (en) Improvements relating to smoking articles
GB8727330D0 (en) Smoking articles
GB8727329D0 (en) Smoking articles
GB8723142D0 (en) Smoking articles
GB8718827D0 (en) Smoking article containers
AU7967987A (en) Tobacco smoking article
IE882371L (en) Wrapper for smoking articles
GB2236657B (en) Improvements relating to smoking articles
EG18287A (en) Improvements relating to smoking articles
VN87A1 (en) Smoking article
MTP988B (en) Smoking article
IE861893L (en) Smoking article
GB8729389D0 (en) Improvements relating to smoking articles