EP2506729A2 - Papier à cigarette conditionné sous bandes et aligné, cigarettes et procédé de fabrication - Google Patents

Papier à cigarette conditionné sous bandes et aligné, cigarettes et procédé de fabrication

Info

Publication number
EP2506729A2
EP2506729A2 EP10781426A EP10781426A EP2506729A2 EP 2506729 A2 EP2506729 A2 EP 2506729A2 EP 10781426 A EP10781426 A EP 10781426A EP 10781426 A EP10781426 A EP 10781426A EP 2506729 A2 EP2506729 A2 EP 2506729A2
Authority
EP
European Patent Office
Prior art keywords
tobacco rod
cigarette
banded
tobacco
propensity
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.)
Withdrawn
Application number
EP10781426A
Other languages
German (de)
English (en)
Inventor
Timothy Scott Sherwood
Tejinder K. Gill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
Original Assignee
Philip Morris Products SA
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 Philip Morris Products SA filed Critical Philip Morris Products SA
Publication of EP2506729A2 publication Critical patent/EP2506729A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • A24D1/02—Cigars; Cigarettes with special covers
    • A24D1/025—Cigars; Cigarettes with special covers the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity

Definitions

  • This disclosure broadly concerns cigarettes and cigarette wrapping paper having one or more ignition-propensity-modulating structures, such as circumferential bands.
  • this disclosure deals with a method of making banded cigarette wrapping paper so that bands of individual cigarettes are substantially uniformly positioned relative to structural features of the cigarette.
  • the disclosure relates to cigarettes in which bands are uniformly positioned relative to features of a finished cigarette.
  • banded wrapper paper for cigarettes exhibited bands of preferred widths spaced longitudinally along the length of the paper by a preferred nominal distance.
  • finished cigarettes had bands randomly, or quasi-randomly, positioned relative to structural features of the cigarette, such as the lightable end, or the filter end, or the mouth end, or the filter itself.
  • a nominal finished length for a cigarette tobacco rod may be selected.
  • a pitch of the predetermined position of bands relative to the nominal length is determined.
  • the relationship of a band position to a structural feature of the finished cigarette may be selected or determined based on the pitch.
  • the number of bands for each finished cigarette may be chosen or selected.
  • a predetermined width for the band(s) may be selected from a preferred range of band widths, width being measured along the longitudinal length of the tobacco rod.
  • the predetermined band width, and predetermined position are then correlated with the nominal finished length of the tobacco rod by adjusting spacing between bands on the cigarette paper such that band positioning occurs at substantially the same location on each finished cigarette.
  • the cigarette paper according to this disclosure has transverse bands spaced from one another such that the relationship between one or more band widths and the inter-band spacing corresponds to a fraction of the nominal length of a tobacco rod.
  • the cigarette paper has bands positioned in accordance with the features described above.
  • a finished cigarette according to this disclosure has a tobacco rod of nominal length, may include a filter, and preferably is manufactured with a cigarette paper as described above.
  • the cigarette, specifically the tobacco rod, has a lightable end.
  • the tobacco rod also has a mouth end or filter end. Where a filter is used, it is attached to the filter end of the tobacco rod in a conventional manner.
  • the wrapper paper for the cigarette preferably includes at least one band located at a first predetermined distance from either the lightable end or the filter end, where the predetermined distance is essentially constant from one cigarette to the next. If desired, another band may be positioned a second predetermined distance from the other of the lightable end and the filter end. Further, more than two bands can be provided on each cigarette, if desired.
  • the first predetermined distance is selected such that the first band is spaced from the lightable end by a distance corresponding to about 1/2 the pitch between adjacent bands.
  • FIG. 1 is a perspective view of a smoking article according to this disclosure
  • FIG. 2 depicts a plan view of an embodiment of wrapper paper according to this disclosure
  • FIG. 3 shows a graph of the percent full-length burns for cigarettes having a banded region beginning 12mm to 18mm from the lit end of the cigarette versus the percent full-length burns for cigarettes having a randomly positioned banded region;
  • FIG. 4 is a schematic diagram showing portions of the cigarette manufacturing process.
  • registration means to make or adjust so as to correspond substantially exactly.
  • the "lightable end” or “lit end” of a cigarette or cigarette tobacco rod refers to the end of the cigarette or cigarette tobacco rod intended to be lit when smoking starts. Registration of the location between the beginning of a banded region from the lit end of a cigarette may further be used to minimize the number of cigarette self- extinguishments.
  • the term “about”, “substantially”, or “generally” is used, that term is intended to include equivalents within the modified feature. When any of those terms is used in relation to a number, it is intended that such number has a tolerance of plus or minus 5%.
  • suitable types of tobacco materials include, but are not limited to, flue-cured tobacco, Burley tobacco, Maryland tobacco, Oriental tobacco, rare tobacco, specialty tobacco, blends thereof, and the like.
  • the tobacco material may be provided in any suitable form, including, but not limited to, (i) cut filler tobacco, (ii) tobacco lamina, (lii) processed tobacco materials, such as volume expanded or puffed tobacco, (iv) processed tobacco stems, such as cut-rolled or cut-puffed stems, (v) reconstituted tobacco materials, (vi) blends thereof, and the like. Tobacco substitutes may also be used. Cut filler tobacco is preferred.
  • the tobacco is normally used in the form of cut filler, i.e. , in the form of shreds or strands cut into widths ranging from about 2.5mm to about 1.2mm (1/10 inch to about 1/20 inch) or even about 0.6mm (1/40 inch).
  • the length of individual tobacco strands range from between about 6mm to about 75mm (0.25 inch to about 3.0 inches).
  • Tobacco materials used for cigarettes may further include one or more flavorants, or other suitable additives (e.g., burn additives, combustion modifying agents, coloring agents, binders, etc.).
  • a cigarette 20 in accord with this disclosure typically includes a tobacco rod 22 having a lightable end 26 and a second end 34.
  • the second end 34 may be the mouth end, or may be provided with a filter 24 having an end 28.
  • the filter 24 is attached to the tobacco rod 22 by tipping paper 25
  • the tobacco rod 22 includes a quantity of tobacco material as discussed above, and is surrounded by a wrapper paper 23.
  • the tobacco rod is formed as the wrapper paper moves along its longitudinal axis.
  • Tobacco material is deposited on the moving wrapper paper, which is then wrapped around the tobacco, sealed, and cut to form the tobacco rod 22.
  • that conventional cigarette manufacture process led to a random or quasi-random positioning of the band 30 relative to the lightable or lit end 26 of the cigarette.
  • the first band 30 be located at a first predetermined distance from the lit or lightable end 26 of the cigarette.
  • the band 30 comprises an ignition-propensity-modulating structure and may be fashioned from (i) an add-on layer of material from which the base web is constructed, (ii) one or more printed layers of aqueous or non-aqueous film-forming solutions, or (iii) other materials, such that the ignition propensity of the tobacco rod 22 is modulated, controlled, regulated, or adjusted.
  • that first predetermined distance corresponds to about 50% of the pitch between adjacent banded regions, and more particularly about 25% of the length of the cigarette rod in the finished smoking article where the smoking article has two banded regions.
  • the predetermined distance also preferably lies in the range of about 12mm to about 18mm. That preferred predetermined distance may be adjusted by selecting the number of banded regions on the cigarette or tobacco rod so that 50% of the pitch falls within the preferred range.
  • the predetermined distance be substantially constant for all smoking articles in a conventional pack of smoking articles. When that predetermined distance is substantially uniformly maintained during cigarette manufacture, the resulting cigarettes 20 not only have improved ignition propensity performance when tested, but also the ignition propensity performance is more uniform between smoking articles than has previously been observed.
  • the presently disclosed banded cigarette paper 23 may be manufactured by a method and using an apparatus such as disclosed in commonly owned US 6 596 125, hereby incorporated by reference in its entirety, which relates to a method and apparatus for applying a predetermined pattern of add-on slurry material to a base web, preferably in the form of transversely extending stripes. More particularly, that patent concerns a method and apparatus for producing cigarette paper having banded regions of additional material. As disclosed therein, the banded regions may exhibit a slower burn rate than those regions of the base web located between the banded regions.
  • banded cigarette paper includes commonly owned US 5 417 228, US 5 474 095, and US 5 534 114, each of which is hereby incorporated by reference in its entirety.
  • the banded regions can also be formed by other techniques such as printing, specifically gravure printing. See commonly owned US 5 417 228 and US 5 144 964, each of which is hereby incorporated by reference in its entirety.
  • the widths of the banded regions preferably lie in the range of about 5mm to about 7mm, and more preferably about 6mm.
  • the resulting banded cigarette wrapper paper 23 typically is wrapped on a bobbin.
  • Each bobbin may, for example, hold a strip of paper with a length on the order of 6000 metres.
  • the width of the paper strip on a bobbin is related to the circumference of the cigarettes to be formed. Usually, the width exceeds the cigarette circumference sufficiently to include a glue strip area.
  • cut filler tobacco 101 is continuously deposited along an advancing strip of cigarette wrapping paper 23, which is supplied from a bobbin 104 at a tobacco rod maker 103.
  • the paper 23 is wrapped around the filler tobacco, making a substantially continuous, long, column 106.
  • That column 106 is cut into two-up rods 108 suitable for making two individual cigarettes 20, 20'.
  • the column may be transversely severed at locations 40, 44 at the rod maker 103 to produce tobacco rods 108 having a nominal length 21.
  • the two-up tobacco rods 108 are then fed into a tipping machine 1 10 such as a Hauni MAX, wherein the two-up tobacco rods 108 are cut at a location 42 into two tobacco rods 22, 22', which are moved apart to receive a two-up filter segment 1 12 therebetween.
  • the two-up filter segment 1 12 is attached to the longitudinally spaced pair of cigarette tobacco rods 22, 22' using tipping paper 1 14.
  • the double-length cigarette assembly 1 16 is then cut in half to produce two finished cigarettes 20, 21 (see FIG. 1 ). It is possible that the multiple tobacco rod be two-up, four-up, six-up or the like and that other tipping operations be used.
  • banded regions 30 may comprise additional add-on material and/or burn rate modifiers to achieve desired reductions in ignition propensity.
  • the banded regions 30 may be used to impart subjective qualities of the cigarette.
  • banded regions may comprise flavoring. Banded regions comprising flavoring may exhibit a burn rate equal to non-banded regions of the cigarette paper or may exhibit a slower burn rate as compared to adjacent non-banded regions of the cigarette paper.
  • Each band 30, 32 (see FIG. 1 ) is configured to have a leading edge 31 and a trailing edge 33, in the sense that a smoldering coal advancing from the lit end 26 first approaches the leading edge 31 .
  • the bands in a finished cigarette depends on the nominal length / of cigarette tobacco rods sliced from a tobacco rod made using the banded cigarette paper.
  • the bands typically have a constant width. Where all bands of the strip of cigarette wrapper paper have a uniform spacing (i.e., the distance from the end of one banded region - the trailing edge 33 - to the beginning of the next banded region - the leading edge 33 - is a constant value), the banded regions will be randomly or quasi-randomly arranged on the finished cigarettes. Registration
  • the presently disclosed cigarette paper 23 (see FIG. 1) is preferably designed so that banded regions of a finished cigarette are positioned, or registered, relative to a structure of the finished cigarette 20 such as the lightable end 26, or the mouth end 34, or both.
  • the disclosed cigarette paper 23 may be designed such that each tobacco rod 22 made from the cigarette paper 23 has at least two banded regions 30, 32, one being registered relative to the lit end 26, and one being registered relative to the filter end 34 or 28.
  • each band 30, 32 exhibits a slower burn rate in comparison to adjacent non-banded regions of the cigarette paper 23 and thus modulates the ignition propensity of an associated tobacco rod.
  • the center of a first banded region 30 is preferably positioned at a predetermined distance, d, from a first end (i.e., the lit end 26).
  • a first end i.e., the lit end 26
  • the leading edge 31 of the banded region is spaced by a distance from the lit end 26 corresponding to that predetermined distance, of, less half of the width of the banded region 30.
  • the cigarette tobacco rod preferably includes a second banded region 32, the center of which is spaced by the predetermined distance, d, from a second end (i.e., mouth end or filter end) of the cigarette tobacco rod 22. As illustrated in FIG.
  • each cigarette would have two banded regions 30, 32.
  • the pitch P or spacing between adjacent banded regions can be measured from leading edge 31 of one banded region 30 to the leading edge 31 of an adjacent banded region 32, or between the trailing edges 33 of adjacent banded regions.
  • the banded regions are preferably substantially uniformly spaced along the length of the base web 23. Moreover, each banded region 30, 32 extends transversely across substantially the entire width of the base web 23, running from longitudinal edge to longitudinal edge thereof. Each banded region 30, 32 also has a common width measured in the longitudinal direction of the base web. Typically, that width lies in the range of about 4mm to about 10mm, and more preferably in the range of about 5mm to about 7mm.
  • the distance d from the lit end to the center of the adjacent banded region 30 corresponds to one half the pitch P between adjacent regions.
  • a predetermined distance from the lit end to the leading edge 31 of the adjacent banded region lies in the range of about 12mm to about 18mm.
  • Typical tobacco rod lengths used in cigarette manufacture lie in the range of about 50mm to about 100mm, and preferably lie in the range of about 55mm to about 90mm.
  • the predetermined distance from the lit end to the leading edge 31 corresponds to P/2 less one half the width of the banded region 30 (the width being measured along the longitudinal dimension of the base web or along the axis of a smoking article), selection of the band width, and the number of bands for each tobacco rod length, permits the predetermined distance to be selected in the preferred range of about 12mm to about 18mm. Ordinarily, there will be from 1 to 10 banded regions on a tobacco rod, and preferably in the range of 2 to 4 banded regions.
  • the distance d from the center of a second banded region 32 to the second end (mouth end) of the cigarette tobacco rod also lies in the range of about 10mm to about 20mm, more preferably about 15mm for a filter-tipped king-size 84mm cigarette.
  • the spacing of banded regions along the tobacco rod are preferably symmetrically arranged relative to the lit end and the mouth end of the tobacco rod.
  • registered banded cigarette paper comprises band spacing, starting from a first registered location 40 on the banded cigarette paper 23 and ending at a second registered location 44 on the registered banded cigarette paper 23.
  • the registered locations 40, 44 are where the cutter of the tobacco rod maker (see Fig. 4) repetitively cuts a substantially continuous tobacco rod to form a two-up tobacco rod 22, 22'.
  • Registered location 42 is where the cutter on the tipping machine cuts the two-up tobacco rod 22, 22' to form two cigarettes 20.
  • the paper (wrapper) 23 is provided with a pattern that repeats every length 21:
  • Ki corresponds to spacing between the first registered location 40 on the registered banded cigarette paper 23 and the middle or center of the first band 30 (or the first predetermined distance d).
  • K 2 corresponds to the center-to-center spacing between the first band 30 and the last band 32 of the wrapper paper (the second band in FIGs. 1 and 2) within a length /.
  • the spacing between the first registered location 40 and the second registered location 42 is preferably selected to correspond to an integral number times the length of the tobacco rod / to be used.
  • the pattern repeats multiple times along the length of the wrapper paper 23, and more preferably the pattern repeats along the entire length of the wrapper paper 23.
  • K 2 may be equal to 2K ⁇ such that the pattern would be equivalent to:
  • a tobacco rod 22 having a predetermined length, /, formed from registered banded cigarette paper may have n bands, with n being greater than or equal to 2, and with the band-to-band spacing being P.
  • n is less than or equal to 10.
  • P may be measured from band-center to adjacent band-center, band- leading-edge to adjacent band-leading-edge, or band-trailing-edge to adjacent band-trailing- edge.
  • the required spacing P between adjacent bands is determined, as welt as the predetermined distance, d, between the lit end and the center of the first banded region.
  • the continuous tobacco rod 106 (see FIG. 4) is severed exactly at (or as close as reasonably
  • That location for severing is identified In FIG. 2 for example as 40, 42, 44. Because of the uniformity of banded regions and their respective spacing on the paper web, after the first cut on the continuoue tobacco rod is made, all successive cuts to form two-up tobacco rods occur at the same relative location between adjacent banded regions. Accordingly, the predeterminedo distance d between the lit end and the first band is substantially uniform for all smoking articles fabricated from the tobacco rod made from one bobbin of banded wrapper.
  • the wrapper paper 23 exhibits a repeating pattern along Its longitudinal length. That pattern has a predetermined length, preferably corresponding to twice the nominal length / of a tobacco rod5 for a cigarette. That predetermined length is measured from the first registered location 40 to the second registered location 44. Furthermore, within the predetermined length, the pattern is symmetrical about a transversa axis corresponding to the registered location 42.
  • the tobacco rod maker 103 cuts or otherwise severs the continuous tobacco rod 10 ⁇ at the first and second registered locations 40, 44 so aso to form, for example, a two-up tobacco rod having the predetermined length.
  • the tipping machine 110 cuts or otherwise severs the two-up tobacco rod at the axis of symmetry for the pattern, so that the resulting smoking articles have substantially uniform spatial positioning of the banded regions relative to the lightable or lit end of the smoking article.
  • a series of prototype cigarettes has been prepared using various levels of chalk loading, all less than 12%.
  • the prototype series are identified in the following table as A, B, C, and ⁇ .
  • the table below summarizes testing of those prototype cigarettes which was conducted according to ASTM Standard E2187-04.
  • Results of the testing are tabulated in the following table according to the prototype, and according to the distance from the lit end to the first banded region.
  • the first data column summarizes the results for cigarettes where the first banded region 30 begins 12mm to 18mm from the lit end of the cigarette (i.e., dor Ki).
  • the second data column summarizes the results for cigarettes where the first banded region begins outside the region of 12mm to 18mm from5 the lit end of the cigarette.
  • FLB Full-Length Burns
  • EXT Extinguishments
  • extinguishment refers to a non-full-length burn.
  • the data indicate that the cigarettes having the first banded region in the range of 12mm to 18mm from the lit or lightable end exhibit a substantially reduced percentage of cigarettes that yield a free-length burn when contrasted to cigarettes where the first banded region is outside that range.
  • FIG. 3 compares the percent full-length burns for the four prototype cigarettes listed in the Table as well as four additional prototype cigarettes, all with banded regions beginning 12mm to 18mm from the lit end of the cigarette, to the percent full-length burns for the four prototype cigarettes listed in the Table as well as four additional prototype cigarettes, all with randomly placed banded regions.
  • the randomly placed banded regions may begin less than 12mm from the lit end of the cigarette, 12mm to18mm from the lit end of the cigarette, or greater than 18mm from the lit end of the cigarette.
  • the dashed line is the best fit to the data points.
  • FIG. 3 illustrates that cigarettes having a banded region beginning 12mm to18mm from the lit end of the cigarette are less likely, specifically up to approximately three times less likely, to exhibit full- length burns when compared to cigarettes having a randomly placed banded region.
  • the wrapper paper is prepared with banded regions which repeat along the longitudinal length thereof according to the KL K 2 , pattern discussed above.
  • the wrapper paper having the predetermined banding pattern is fed into the garniture machine during cigarette making and a first cut of the tobacco column is made at a location spaced from the first banded region 30 (see FIG. 2) by a predetermined distance preferably lying in the range of about 12mm to about 18mm. Accordingly, each successive cut of the tobacco column prepares a double length tobacco rod, which is then severed to make two cigarettes.
  • a filter may be applied as discussed above. Referring now to FIG.
  • the desired cutting operations are achieved at the rod maker 103 with a sensor 120 adapted to generate a signal upon detection of a banded region 30 and/or 32 and a processor 122 adapted to cause operation of the cutter 124 responsively to the signal generated by the sensor 120.
  • each cigarette 20 (see FIG. 1 ) will have the first banded region positioned at the predetermined distance from the lit or lightable end of the cigarette. Moreover, each cigarette in a pack of 20 such cigarettes will also have the first banded region positioned at the predetermined distance from the cigarette end.
  • this registration method, and wrapper construction process it is also possible to treat selected bands differently than other bands, depending on desired characteristics. For example, it would be possible to add a flavorant to the first banded region to enhance smoking enjoyment. It would also be possible to modify the last banded region of the cigarette in a way that may statistically more often cause a cigarette to extinguish when left unattended upon a substrate. For example, the last banded region might comprise additional add-on material or a greater width.

Abstract

La présente invention se rapporte à un papier à cigarette conditionné sous bandes qui peut être aligné (23) pour un article à fumer (20). Les zones conditionnées sous bandes (32) sont espacées les unes des autres d'une distance égale à la longueur de la tige de tabac de l'article à fumer divisée par un nombre entier. Il en résulte des zones conditionnées sous bandes qui commencent sensiblement au même endroit sur chaque cigarette. Chaque zone conditionnée sous bandes est donc positionnée à une distance prédéterminée préférée par rapport à l'extrémité de la cigarette. Les cigarettes réalisées avec un tel papier présentent une propension à l'allumage constante et améliorée par comparaison avec des zones conditionnées sous bandes positionnées de façon aléatoire ou quasi aléatoire. La présente invention se rapporte également à des cigarettes réalisées avec le papier à cigarette conditionné sous bandes qui peut être aligné et à des procédés de fabrication de cigarettes avec le papier conditionné sous bandes qui peut être aligné.
EP10781426A 2009-11-10 2010-11-05 Papier à cigarette conditionné sous bandes et aligné, cigarettes et procédé de fabrication Withdrawn EP2506729A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/615,700 US20110108042A1 (en) 2009-11-10 2009-11-10 Registered banded cigarette paper, cigarettes, and method of manufacture
PCT/EP2010/006756 WO2011057743A2 (fr) 2009-11-10 2010-11-05 Papier à cigarette conditionné sous bandes et aligné, cigarettes et procédé de fabrication

Publications (1)

Publication Number Publication Date
EP2506729A2 true EP2506729A2 (fr) 2012-10-10

Family

ID=43743462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10781426A Withdrawn EP2506729A2 (fr) 2009-11-10 2010-11-05 Papier à cigarette conditionné sous bandes et aligné, cigarettes et procédé de fabrication

Country Status (9)

Country Link
US (1) US20110108042A1 (fr)
EP (1) EP2506729A2 (fr)
JP (1) JP2013509889A (fr)
KR (1) KR20120091346A (fr)
CN (1) CN102802452A (fr)
BR (1) BR112012011001A2 (fr)
IN (1) IN2012DN03437A (fr)
MX (1) MX2012005478A (fr)
WO (1) WO2011057743A2 (fr)

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KR101913887B1 (ko) 2014-12-31 2018-12-28 최해용 휴대용 가상현실장치
UA124809C2 (uk) * 2016-12-21 2021-11-24 Філіп Морріс Продактс С.А. Курильний виріб із засобом гасіння
WO2018114848A1 (fr) 2016-12-21 2018-06-28 Philip Morris Products S.A. Article à fumer à moyen d'extinction
KR102055500B1 (ko) 2018-05-08 2020-01-22 최해용 휴대용 가상현실장치
KR102414658B1 (ko) 2018-07-05 2022-06-29 주식회사 케이티앤지 궐련
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Also Published As

Publication number Publication date
BR112012011001A2 (pt) 2016-05-03
JP2013509889A (ja) 2013-03-21
WO2011057743A3 (fr) 2012-08-30
KR20120091346A (ko) 2012-08-17
WO2011057743A2 (fr) 2011-05-19
IN2012DN03437A (fr) 2015-10-23
US20110108042A1 (en) 2011-05-12
CN102802452A (zh) 2012-11-28
MX2012005478A (es) 2012-06-12

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