DE1300854B - Filters for cigarettes - Google Patents
Filters for cigarettesInfo
- Publication number
- DE1300854B DE1300854B DER40626A DER0040626A DE1300854B DE 1300854 B DE1300854 B DE 1300854B DE R40626 A DER40626 A DE R40626A DE R0040626 A DER0040626 A DE R0040626A DE 1300854 B DE1300854 B DE 1300854B
- Authority
- DE
- Germany
- Prior art keywords
- filters
- acid
- carboxylic acid
- acid alkyl
- cellulose
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Paper (AREA)
Description
Die Erfindung bezieht sich auf Filter für Zigaretten aus Fasern oder Vliesen auf Basis von Acetylcellulose, die mit einem Vernetzungs- bzw. Verfestigungsmittel behandelt sind. The invention relates to filters for cigarettes made of fibers or nonwovens based on acetyl cellulose, which are treated with a crosslinking or solidifying agent.
Aufgabe der Erfindung ist die Schaffung eines solchen Filters, das gegenüber den bisher bekannten Filtern erhöhte Absorptionsfähigkeit aufweist.The object of the invention is to create such a filter, which compared to the previously known Filter has increased absorbency.
Es ist bereits versucht worden, die Absorptionsfähigkeit solcher Filter durch Behandlung des Cellulose- oder Acetylcellulose-Filtermaterials mit ge- ίο eigneten Imprägnierungsmitteln zu verbessern. Hierbei muß jedoch der Nachteil in Kauf genommen werden, daß die lediglich an dem Fasermaterial haftenden Imprägnierungssubstanzen geschmackliche Beeinträchtigungen des Rauches hervorrufen. isAttempts have already been made to increase the absorption capacity of such filters by treating the cellulose or to improve acetyl cellulose filter material with suitable impregnating agents. Here however, the disadvantage must be taken into account that they only adhere to the fiber material Impregnation substances cause adverse effects on the taste of the smoke. is
Es ist weiter bekannt, zu dem gleichen Zweck des Cellulosematerials als solches zu verändern, nämlich die Filter aus entsprechenden Cellulosederivaten, ζ. B. eine Vielzahl von freie Säuregruppen enthaltenden Resten an den Hydroxylgruppen im Cellulose- ao molekül aufweisenden Cellulosederivaten, herzustellen. Filter aus solchen Cellulosederivaten, zu welchen beispielsweise saure Phthalatacetylcellulose, saure Succinatcellulose, saure Zitratcellulose der saure Phosphatcellulose gehören, haben zwar eine gute Absorptionsfähigkeit für alkalische Substanzen im Rauch, jedoch sind die Fasereigenschaften dieser Cellulosederivate, verglichen mit denen von Fasern aus Acetylcellulose, für die Herstellung von Filtern nicht günstig, weil die Fasern spröder sind und schneller altern, so daß während der Benutzung solcher Filter Faserstückchen sich ablösen und mit dem Rauch mitgerissen werden können.It is also known to modify the cellulosic material as such for the same purpose, namely the filters made from corresponding cellulose derivatives, ζ. B. containing a variety of free acid groups Residues on the hydroxyl groups in the cellulose ao molecule-containing cellulose derivatives to produce. Filters made from such cellulose derivatives, to which, for example, acidic phthalate acetyl cellulose, acidic Succinate cellulose, acid citrate cellulose belonging to the acid phosphate cellulose, have a good one though Absorbency for alkaline substances in smoke, but the fiber properties are this Cellulose derivatives, compared with those of fibers made from acetyl cellulose, for the manufacture of filters not favorable because the fibers are more brittle and age faster, so that such during use Filter pieces of fiber detach and can be carried away with the smoke.
Zum Stand der Technik gehört ferner die Verwendung von Triäthylzitrat als Härtungsmittel für Zigarettenfilter auf Celluloseacetatbasis. Dieses Triäthylzitrat weist jedoch keine selektiven Eigenschaften auf.The prior art also includes the use of triethyl citrate as a hardening agent for cigarette filters based on cellulose acetate. However, this triethyl citrate has no selective properties.
Gemäß der Erfindung werden die Nachteile der bekannten Filter auf Basis von Acetylcellulose vermieden durch die Verwendung von Carbonsäurealkylestern als Vernetzungs- bzw. Verfestigungsmittel. Dabei kann als saurer Carbonsäurealkylester Zitronensäurediäthylester verwendet werden.According to the invention, the disadvantages of the known filters based on acetyl cellulose are avoided through the use of carboxylic acid alkyl esters as crosslinking or solidifying agents. Citric acid diethyl ester can be used as the acidic carboxylic acid alkyl ester be used.
In weiterer Ausbildung dear Erfindung wird als Vernetzungsmittel ein Gemisch der sauren Carbonsäurealkylester mit Glyzerintriacetat, insbesondere im Verhältnis von 3 Gewichtsteilen Zitronensäurediäthylester zu 5 Gewichtsteilen Glyzerintriacetat, verwendet. In a further development of the invention, a mixture of the acidic carboxylic acid alkyl esters is used as the crosslinking agent with glycerol triacetate, especially in a ratio of 3 parts by weight of citric acid diethyl ester to 5 parts by weight of glycerol triacetate used.
Die in dem Filter gemäß der Erfindung vorhandenen sauren Ester bewirken eine Steigerung des direkten Absorptionsgrades insbesondere für Nikotin. Als Säuren kommen alle organischen Polycarbonsäuren in Betracht, die physiologisch unbedenklich sind, wie z. B. Zitronensäure, Weinsäure, Bernsteinsäure, Apfelsäure, Zuckersäure, die mit allen physiologisch unbedenklichen Alkoholen — wie insbesondere Äthylalkohol — teilweise verestert sein können. Hydroxylhaltige Säuren können als solche oder in Form ihrer Ester mit einbasischen organischen Säuren, wie Essigsäure, Propionsäure u. dgl. sowie mit anderen Polycarbonsäuren verwendet werden. Die sauren Carbonsäurealkylester werden, gegebenenfalls im Gemisch mit Glyzerintriacetat, zweckmäßig feinverteilt als Oberflächenfilm auf die Oberflächen der Fasern aufgebracht, indem z. B. die Acetatfäden mit diesem Stoff besprüht oder die Fasern durch ein aus demselben bestehendes Tauchbad geführt werden.The acidic esters present in the filter according to the invention cause an increase in the direct Degree of absorption especially for nicotine. All organic polycarboxylic acids can be used as acids into consideration, which are physiologically harmless, such as. B. citric acid, tartaric acid, succinic acid, Malic acid, sugar acid, those with all physiologically harmless alcohols - such as in particular Ethyl alcohol - can be partially esterified. Hydroxyl-containing acids can be used as such or in Form of their esters with monobasic organic acids such as acetic acid, propionic acid and the like can be used with other polycarboxylic acids. The acidic carboxylic acid alkyl esters are, if appropriate as a mixture with glycerol triacetate, appropriately finely divided as a surface film on the surfaces the fibers applied by z. B. sprayed the acetate threads with this fabric or the fibers be guided through an immersion bath consisting of the same.
Die erfindungsgemäßen Filter haben eine erheblich verbesserte Wirksamkeit, insbesondere hinsichtlich der Entfernung von alkalischen Bestandteilen, z. B. Nikotin, aus dem Rauch, ohne daß die diese verbesserte Absorption herbeiführenden freie Hydroxylgruppen enthaltenden Zusatzmittel mit dem Rauch mitgerissen und vom Raucher inhaliert werden. Das ist darauf zurückzuführen, daß diese Zusatzmittel gleichzeitig Varnetzungs- bzw. Verfestigungsmittel für Acetylcellulose sind und eine feste Haftung mit der Faseroberfläche eingehen.The filters according to the invention have a considerably improved effectiveness, in particular with regard to the removal of alkaline components, e.g. B. Nicotine, from the smoke without the this improved absorption-inducing free hydroxyl group-containing additives with the Smoke entrained and inhaled by the smoker. This is due to the fact that these additives are at the same time hardening agents for acetyl cellulose and a solid one Adhere to the fiber surface.
In der folgenden Tabelle werden die bekannten neutralen Ester in ihrer Wirkung den erfindungsgemäßen sauren Estern gegenübergestellt. Die verbesserte Absorptionswirkung von mit verschiedenen sauren Carbonsäurealkylestern behandelten Filtern ist der eines handelsüblichen Filters gegenübergestellt. Der Zugwiderstand wurde bei den Vergleichsproben unter gleichen Bedingungen geprüft.In the table below, the effect of the known neutral esters is similar to that of the invention contrasted with acid esters. The improved absorption effect of using different Filters treated with acidic carboxylic acid alkyl esters are compared to those of a commercially available filter. The tensile resistance was tested in the comparison samples under the same conditions.
Neutrale EsterNeutral esters
VerfestigerHardener
Filterlänge
(mm)Filter length
(mm)
Spezifischer
ZugwiderstandMore specific
Tensile resistance
(mmWS)(mmWS)
Direkter Absorptionsgrad für Nikotin Direct degree of absorption for nicotine
C/o)C / o)
Triacetin Triacetin
Triacetin Triacetin
TriäthylcitratTriethyl citrate
(Zitronensäuretriäthylester)
Triäthylcitrat (Citric acid triethyl ester)
Triethyl citrate
14
1414th
14th
14
1414th
14th
5/78 3/585/78 3/58
5/78 3/58 29
33,35/78 3/58 29
33.3
28,5
34,128.5
34.1
29
32,729
32.7
29,3
31,429.3
31.4
Saure EsterAcid esters
Zitronensäurediäthylester Citric acid diethyl ester
Diacetylweinsäuremonoäthylester.Diacetyltartaric acid monoethyl ester.
Malonsäuremonoäthylester Malonic acid monoethyl ester
Weinsäuremonoäthylester Tartaric acid monoethyl ester
Äpfelsäuremonoäthylester Malic acid monoethyl ester
Acetylcitronensäureäthylester ...
Malonsäuremonoäthylester Acetylcitric acid ethyl ester ...
Malonic acid monoethyl ester
Die in der vorstehenden Tabelle aufgeführten Verfestiger wurden mit 30% dem Triacetin beigemengt und die Gemische mit 9 °/o, bezogen auf das Filtergewicht, aufgegeben.The solidifying agents listed in the table above were added to the triacetin at 30% and the mixtures at 9%, based on the filter weight, abandoned.
Der direkte Absorptionsgrad für Nikotin wurde nach den einheitlichen Vorschriften des Verbandes der Zigarettenindustrie ermittelt.The direct degree of absorption for nicotine was determined according to the uniform regulations of the association determined by the cigarette industry.
Die direkte Absorption für Nikotin liegt, wie ersichtlich, bei dem erfindungsgemäßen Filter um mehr als 25«/o höher als bei den bekannten Filtern, ohne daß die mechanischen Eigenschaften beeinträchtigt werden.The direct absorption for nicotine is, as can be seen, in the case of the filter according to the invention by more than 25% higher than in the case of the known filters without that the mechanical properties are impaired.
Claims (3)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER40626A DE1300854B (en) | 1965-05-14 | 1965-05-14 | Filters for cigarettes |
LU51086A LU51086A1 (en) | 1965-05-14 | 1966-05-12 | |
BE680932D BE680932A (en) | 1965-05-14 | 1966-05-12 | |
FI1267/66A FI42685B (en) | 1965-05-14 | 1966-05-12 | |
CH700066A CH480810A (en) | 1965-05-14 | 1966-05-13 | Cigarette filters |
GB21351/66A GB1079827A (en) | 1965-05-14 | 1966-05-13 | Cigarette filter |
NL666606594A NL154102B (en) | 1965-05-14 | 1966-05-13 | PROCEDURE FOR MANUFACTURING CIGARETTE FILTERS AND CIGARETTE FILTERS OBTAINED UNDER THIS PROCEDURE. |
FR61464A FR1479836A (en) | 1965-05-14 | 1966-05-13 | Filter for cigarettes |
DK248066AA DK119757B (en) | 1965-05-14 | 1966-05-14 | Method of making a cigarette filter. |
US550124A US3424172A (en) | 1965-05-14 | 1966-05-16 | Cigarette filters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER40626A DE1300854B (en) | 1965-05-14 | 1965-05-14 | Filters for cigarettes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1300854B true DE1300854B (en) | 1969-08-07 |
Family
ID=7406120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER40626A Pending DE1300854B (en) | 1965-05-14 | 1965-05-14 | Filters for cigarettes |
Country Status (9)
Country | Link |
---|---|
US (1) | US3424172A (en) |
BE (1) | BE680932A (en) |
CH (1) | CH480810A (en) |
DE (1) | DE1300854B (en) |
DK (1) | DK119757B (en) |
FI (1) | FI42685B (en) |
GB (1) | GB1079827A (en) |
LU (1) | LU51086A1 (en) |
NL (1) | NL154102B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052415A (en) * | 1988-06-13 | 1991-10-01 | B.A.T. Cigarettenfabriken Gmbh | Process for the impregnation of fibers of a tobacco smoke filter with dicarboxylic or polycarboxylic acids or anhydrides thereof |
WO1997016986A1 (en) * | 1995-11-09 | 1997-05-15 | Rhodia Acetow Ag | Filter cigarette |
Families Citing this family (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4153064A (en) * | 1975-07-11 | 1979-05-08 | Daicel Ltd. | Cigarette filters |
US5150723A (en) * | 1988-09-28 | 1992-09-29 | Eastman Kodak Company | Process for the production of tobacco smoke filters |
US4964426A (en) * | 1988-09-28 | 1990-10-23 | Eastman Kodak Company | Tobacco smoke filters and process for production thereof |
US5141006A (en) * | 1990-02-28 | 1992-08-25 | Eastman Kodak Company | Tobacco smoke filter material and process for production thereof |
US5817159A (en) * | 1996-12-31 | 1998-10-06 | Cahill; Scott A. | Filter with interpenetrating polymer network that biodegrades |
US7479098B2 (en) * | 2005-09-23 | 2009-01-20 | R. J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US7789089B2 (en) | 2006-08-04 | 2010-09-07 | R. J. Reynolds Tobacco Company | Filtered cigarette possessing tipping material |
US8171941B2 (en) * | 2007-02-26 | 2012-05-08 | R. J. Reynolds Tobacco Company | Cigarette customization apparatus and associated method |
US8186360B2 (en) * | 2007-04-04 | 2012-05-29 | R.J. Reynolds Tobacco Company | Cigarette comprising dark air-cured tobacco |
US7972254B2 (en) * | 2007-06-11 | 2011-07-05 | R.J. Reynolds Tobacco Company | Apparatus for inserting objects into a filter component of a smoking article, and associated method |
US8186359B2 (en) | 2008-02-01 | 2012-05-29 | R. J. Reynolds Tobacco Company | System for analyzing a filter element associated with a smoking article, and associated method |
US8613284B2 (en) | 2008-05-21 | 2013-12-24 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a degradable fiber |
ES2420685T5 (en) | 2008-05-21 | 2017-02-10 | R.J. Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article and smoking articles manufactured therefrom |
US8079369B2 (en) | 2008-05-21 | 2011-12-20 | R.J. Reynolds Tobacco Company | Method of forming a cigarette filter rod member |
US20100059074A1 (en) * | 2008-09-05 | 2010-03-11 | R. J. Reynolds Tobacco Company | Inspection System for a Smoking Article Having an Object Inserted Therein, and Associated Method |
US8308623B2 (en) * | 2008-10-28 | 2012-11-13 | R.J. Reynolds Tobacco Company | Apparatus for enhancing a filter component of a smoking article, and associated method |
US20100108084A1 (en) * | 2008-10-31 | 2010-05-06 | Norman Alan B | Filtered cigarette with diffuse tipping material |
US20100108081A1 (en) * | 2008-10-31 | 2010-05-06 | Leigh Ann Blevins Joyce | Filtered cigarette with flavored tipping material |
US8522515B2 (en) * | 2009-01-26 | 2013-09-03 | R.J. Reynolds Tobacco Company | Method and apparatus for customizing cigarette packages |
US8262550B2 (en) | 2009-03-19 | 2012-09-11 | R. J. Reynolds Tobacco Company | Apparatus for inserting objects into a filter component of a smoking article |
US8808153B2 (en) * | 2009-07-14 | 2014-08-19 | Aiger Group Ag | Apparatus for assembly of multi-segment rod-like articles |
US8434498B2 (en) | 2009-08-11 | 2013-05-07 | R. J. Reynolds Tobacco Company | Degradable filter element |
US8997755B2 (en) | 2009-11-11 | 2015-04-07 | R.J. Reynolds Tobacco Company | Filter element comprising smoke-altering material |
US20110162662A1 (en) * | 2010-01-05 | 2011-07-07 | Aiger Group Ag | Apparatus and method for insertion of capsules into filter tows |
US9131730B2 (en) * | 2010-01-07 | 2015-09-15 | Aiger Group Ag | System and apparatus for registration of different objects in rod shaped articles |
US8760508B2 (en) * | 2010-01-13 | 2014-06-24 | R.J. Reynolds Tobacco Company | Filtered smoking article inspection system, and associated method |
US20110271968A1 (en) | 2010-05-07 | 2011-11-10 | Carolyn Rierson Carpenter | Filtered Cigarette With Modifiable Sensory Characteristics |
WO2012012053A1 (en) | 2010-06-30 | 2012-01-26 | R.J. Reynolds Tobacco Company | Biodegradable cigarette filter |
US20120017925A1 (en) | 2010-06-30 | 2012-01-26 | Sebastian Andries D | Degradable cigarette filter |
US20120000481A1 (en) | 2010-06-30 | 2012-01-05 | Dennis Potter | Degradable filter element for smoking article |
US8950407B2 (en) | 2010-06-30 | 2015-02-10 | R.J. Reynolds Tobacco Company | Degradable adhesive compositions for smoking articles |
US8720450B2 (en) | 2010-07-30 | 2014-05-13 | R.J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
US8622882B2 (en) | 2010-09-27 | 2014-01-07 | Aiger Group Ag | Apparatus and method for insertion of capsules into filter tows |
US8475348B2 (en) | 2010-09-28 | 2013-07-02 | Aiger Group Ag | Apparatus and method for assembly of multi-segment rod-like articles |
US20120120229A1 (en) | 2010-11-16 | 2012-05-17 | Rj Reynolds Tobacco Company | Cigarette package inspection system, and associated method |
US10609955B2 (en) | 2011-04-08 | 2020-04-07 | R.J. Reynolds Tobacco Company | Filtered cigarette comprising a tubular element in filter |
US11957163B2 (en) | 2011-04-08 | 2024-04-16 | R.J. Reynolds Tobacco Company | Multi-segment filter element including smoke-altering flavorant |
US20120305015A1 (en) | 2011-05-31 | 2012-12-06 | Sebastian Andries D | Coated paper filter |
WO2013004994A1 (en) * | 2011-07-07 | 2013-01-10 | Filtrona Filter Products Development Co.Pte.Ltd | Tobacco smoke filter and method of production |
US9149070B2 (en) | 2011-07-14 | 2015-10-06 | R.J. Reynolds Tobacco Company | Segmented cigarette filter for selective smoke filtration |
US8973588B2 (en) | 2011-07-29 | 2015-03-10 | R.J. Reynolds Tobacco Company | Plasticizer composition for degradable polyester filter tow |
US9289012B2 (en) | 2011-07-29 | 2016-03-22 | R. J. Reynolds Tobacco Company | Plasticizer composition for degradable polyester filter tow |
US10064429B2 (en) | 2011-09-23 | 2018-09-04 | R.J. Reynolds Tobacco Company | Mixed fiber product for use in the manufacture of cigarette filter elements and related methods, systems, and apparatuses |
US20130085052A1 (en) | 2011-09-29 | 2013-04-04 | R. J. Reynolds Tobacco Company | Apparatus for Inserting Microcapsule Objects into a Filter Element of a Smoking Article, and Associated Method |
US8831764B2 (en) | 2011-10-17 | 2014-09-09 | R. J. Reynolds Tobacco Company | Cigarette package coding system and associated method |
US20130167849A1 (en) | 2011-12-28 | 2013-07-04 | Balager Ademe | Method of tipping for smoking article |
US20130167851A1 (en) | 2011-12-28 | 2013-07-04 | Balager Ademe | Method of filter assembly for smoking article |
US9179709B2 (en) | 2012-07-25 | 2015-11-10 | R. J. Reynolds Tobacco Company | Mixed fiber sliver for use in the manufacture of cigarette filter elements |
AT513412B1 (en) | 2012-09-17 | 2014-07-15 | Tannpapier Gmbh | Tipping paper |
US9119419B2 (en) | 2012-10-10 | 2015-09-01 | R.J. Reynolds Tobacco Company | Filter material for a filter element of a smoking article, and associated system and method |
US9664570B2 (en) | 2012-11-13 | 2017-05-30 | R.J. Reynolds Tobacco Company | System for analyzing a smoking article filter associated with a smoking article, and associated method |
US20140261487A1 (en) | 2013-03-14 | 2014-09-18 | R. J. Reynolds Tobacco Company | Electronic smoking article with improved storage and transport of aerosol precursor compositions |
US9974334B2 (en) | 2014-01-17 | 2018-05-22 | Rai Strategic Holdings, Inc. | Electronic smoking article with improved storage of aerosol precursor compositions |
US9844232B2 (en) | 2014-03-11 | 2017-12-19 | R.J. Reynolds Tobacco Company | Smoking article inspection system and associated method |
US10063814B2 (en) | 2014-03-12 | 2018-08-28 | R.J. Reynolds Tobacco Company | Smoking article package inspection system and associated method |
US11641874B2 (en) | 2015-09-09 | 2023-05-09 | R.J. Reynolds Tobacco Company | Flavor delivery article |
US20170172200A1 (en) | 2015-12-16 | 2017-06-22 | R.J. Reynolds Tobacco Company | Flavor additive accessory |
US10524500B2 (en) | 2016-06-10 | 2020-01-07 | R.J. Reynolds Tobacco Company | Staple fiber blend for use in the manufacture of cigarette filter elements |
US10383369B2 (en) | 2017-06-07 | 2019-08-20 | Rai Strategic Holdings, Inc. | Fibrous filtration material for electronic smoking article |
US11388927B2 (en) | 2018-04-05 | 2022-07-19 | R.J. Reynolds Tobacco Company | Cigarette filter object insertion apparatus and associated method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3026226A (en) * | 1957-12-09 | 1962-03-20 | Eastman Kodak Co | Process of manufacturing filters |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA570399A (en) * | 1959-02-10 | Eastman Kodak Company | Filters for tobacco smoke comprising cellulose esters and ethers | |
US3025861A (en) * | 1959-07-02 | 1962-03-20 | Eastman Kodak Co | Nonchanneling tobacco smoke filament filter |
US3144024A (en) * | 1960-04-11 | 1964-08-11 | Darby Food Corp | Impregnated filter means for tobacco articles |
US3285255A (en) * | 1965-06-07 | 1966-11-15 | Eastman Kodak Co | Polyolefin filter |
-
1965
- 1965-05-14 DE DER40626A patent/DE1300854B/en active Pending
-
1966
- 1966-05-12 LU LU51086A patent/LU51086A1/xx unknown
- 1966-05-12 BE BE680932D patent/BE680932A/xx unknown
- 1966-05-12 FI FI1267/66A patent/FI42685B/fi active
- 1966-05-13 NL NL666606594A patent/NL154102B/en not_active IP Right Cessation
- 1966-05-13 CH CH700066A patent/CH480810A/en not_active IP Right Cessation
- 1966-05-13 GB GB21351/66A patent/GB1079827A/en not_active Expired
- 1966-05-14 DK DK248066AA patent/DK119757B/en unknown
- 1966-05-16 US US550124A patent/US3424172A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3026226A (en) * | 1957-12-09 | 1962-03-20 | Eastman Kodak Co | Process of manufacturing filters |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052415A (en) * | 1988-06-13 | 1991-10-01 | B.A.T. Cigarettenfabriken Gmbh | Process for the impregnation of fibers of a tobacco smoke filter with dicarboxylic or polycarboxylic acids or anhydrides thereof |
WO1997016986A1 (en) * | 1995-11-09 | 1997-05-15 | Rhodia Acetow Ag | Filter cigarette |
AU701048B2 (en) * | 1995-11-09 | 1999-01-21 | Rhodia Acetow Aktiengesellschaft | Filter cigarette |
LT4447B (en) | 1995-11-09 | 1999-01-25 | Rhodia Acetow Ag | Filter cigarette |
Also Published As
Publication number | Publication date |
---|---|
FI42685B (en) | 1970-06-01 |
NL154102B (en) | 1977-08-15 |
NL6606594A (en) | 1966-11-15 |
CH480810A (en) | 1969-11-15 |
BE680932A (en) | 1966-10-17 |
US3424172A (en) | 1969-01-28 |
DK119757B (en) | 1971-02-15 |
GB1079827A (en) | 1967-08-16 |
LU51086A1 (en) | 1966-07-12 |
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