SE532696C2 - Coating device for double-sided coating of paper or cardboard - Google Patents

Coating device for double-sided coating of paper or cardboard

Info

Publication number
SE532696C2
SE532696C2 SE0701666A SE0701666A SE532696C2 SE 532696 C2 SE532696 C2 SE 532696C2 SE 0701666 A SE0701666 A SE 0701666A SE 0701666 A SE0701666 A SE 0701666A SE 532696 C2 SE532696 C2 SE 532696C2
Authority
SE
Sweden
Prior art keywords
coating device
scraper
coating
paper web
paper
Prior art date
Application number
SE0701666A
Other languages
Swedish (sv)
Other versions
SE0701666L (en
Inventor
Haakan Karlsson
Tore Eriksson
Original Assignee
Mattssonfoeretagen I Uddevalla
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 Mattssonfoeretagen I Uddevalla filed Critical Mattssonfoeretagen I Uddevalla
Priority to SE0701666A priority Critical patent/SE532696C2/en
Priority to PCT/SE2008/050835 priority patent/WO2009008820A1/en
Publication of SE0701666L publication Critical patent/SE0701666L/en
Publication of SE532696C2 publication Critical patent/SE532696C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/045—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by the blades themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • D21H23/36—Knife or blade forming part of the fluid reservoir, e.g. puddle-type trailing blade or short-dwell coaters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/006—Controlling or regulating
    • D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod

Description

20 25 30 532 G55 KORT BESKRIVNING AV UPPFINNINGEN Ett ändamål med föreliggande uppfinning är att eliminera eller åtminstone minimera ovan nämnda problem, vilket åstadkommes med en metod respektive anordning enligt de bifogade patentkraven. BRIEF DESCRIPTION OF THE INVENTION An object of the present invention is to eliminate or at least minimize the above-mentioned problems, which are achieved with a method or device according to the appended claims.

Tack vare uppfinningen uppnår man en metod och anordning som i allt väsentligt eliminerar ovan nämnda negativa aspekter. Helt överraskande har det dessutom visat sig att nyttjandet av en metod enligt uppfinningen dessutom leder till minskad oliksidighet, vilket strider mot gängse uppfattning för fackmän inom området. Tack vare uppfinningen uppnår man således att kunna uppnå väsentligen problemfri tvåsidig bestrykning med god liksidighet mellan de två ytorna.Thanks to the invention, a method and device are obtained which substantially eliminates the above-mentioned negative aspects. Quite surprisingly, it has also been found that the use of a method according to the invention also leads to a reduction in diversity, which is contrary to the common perception of those skilled in the art. Thanks to the invention, it is thus possible to achieve substantially problem-free double-sided coating with good uniformity between the two surfaces.

Enligt ytterligare aspekter för uppfinningen gäller att: - första avstrykare är i fonn av en hård rullstav, varigenom synnerligen goda resultat har kunnat erhållas vid en anordning enligt uppfinningen. - avstrykare är uppbyggt av ett material med ett âterstudsande av minst 50%, enligt ASTM standard D2632, varigenom synnerligen goda resultat vid tester har uppnåtts. - ansättriingsvinkeln a mellan nämnda andra avstrykare och pappersbanan är 10- 45°, företrädesvis 15 - 25°, varigenom synnerligen goda resultat vid tester har uppnåtts.According to further aspects of the invention, the first scraper is in the form of a hard roller rod, whereby extremely good results have been obtained with a device according to the invention. - scraper is made of a material with a rebound of at least 50%, according to ASTM standard D2632, whereby extremely good results in tests have been achieved. the angle of application a between said second scraper and the paper web is 10 - 45 °, preferably 15 - 25 °, whereby extremely good results in tests have been obtained.

KORT FIGURBESKRIVNING Uppfinningen kommer i det följ ande att beskrivas i mer detalj med hänvisning till de bifogade figurerna, i vilka: Fig. 1 visar principerna för en anordning enligt ett första utförande av uppfinningen sedd fifåri sidan, Fig. 2 visar en förstoring av en del av Fig.1, och F ig. 3 visar ett modifierat utförande enligt uppfinningen.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the accompanying figures, in which: Fig. 1 shows the principles of a device according to a first embodiment of the invention seen from the side, Fig. 2 shows an enlargement of a part of Fig. 1, and Figs. 3 shows a modified design according to the invention.

DETALJBESKRIVNING I Fig. l visas en sidovy av ett bestrykningsarrangemang enligt uppfinningen, bestående av en första bestrykningsanordning 1 anordnad till höger i bild om en uppåtgående pappersbana 3 och en andra bestrykningsanordning 2 anordnad till vänster i bild om pappersbanan 3. Den första bestrykningsanordningen 1 är anordnad för att påföra ett första bestrykningsskikt 9 på ena sidan av pappersbanan 3 och den andra 10 15 20 25 30 35 532 B55 bestrykningsanordningen 2 är anordnad för att påföra ett andra bestrykningsskikt 8 på andra sidan av pappersbanan 3.DETAILED DESCRIPTION Fig. 1 shows a side view of a coating arrangement according to the invention, consisting of a first coating device 1 arranged on the right in the image of an ascending paper web 3 and a second coating device 2 arranged on the left in the image of the paper web 3. The first coating device 1 is arranged to apply a first coating layer 9 on one side of the paper web 3 and the second coating device 2 is arranged to apply a second coating layer 8 to the other side of the paper web 3.

Pappersbanan 3 rör sig uppåt i figuren. Således inkommer pappersbanan 3 utan bestrykningsmedel nedtill, sett i figuren. Fontänapplikatorer 6, 7, på ömse sidor om pappersbanan 3 påför bestrykningsskikt 8, 9 på vardera sidan om pappersbanan.The paper web 3 moves upwards in the clock. Thus, the paper web 3 enters without coating agent at the bottom, seen in the figure. Fountain applicators 6, 7, on either side of the paper web 3, apply coating layers 8, 9 to each side of the paper web.

Konventionella skydd/återföringsplåtar 10, 11 finns anordnade i anslutning till fontänapplikatorerna 6, 7. Därefter finns en kort sträcka (företrädesvis inom området -200 mm - 2000 mm, motsvarande en uppehållstid av 0,01 sek - 1,0 sek, i viss beroende av kvalitet på pappersbanan) innan pappersbanan 3 med de sprayade beläggningsskikten 8, 9, förs till en första avstrykare 4 anordnad på ena sidan om pappersbanan och en andra avstrykare 5 anordnad på andra sidan om pappersbanan 3.Conventional protection / return plates 10, 11 are arranged in connection with the fountain applicators 6, 7. Then there is a short distance (preferably in the range -200 mm - 2000 mm, corresponding to a residence time of 0.01 sec - 1.0 sec, in some dependence of quality on the paper web) before the paper web 3 with the sprayed coating layers 8, 9 is passed to a first scraper 4 arranged on one side of the paper web and a second scraper 5 arranged on the other side of the paper web 3.

Den första slutliga avstrykaren 4 är i form av en hård roterande stav som är roterbart lagrad i en hållarkropp 15. Denna hållarkropp 15 är i sin tur fixerad i en stödstruktur 14, företrädesvis anordnad med en justeringsmekanism, vilken bl.a. kan vara anordnad att kunna styra trycket med vilket den roterande staven 4 kvarhålls i hållarkroppen 15.The first final wiper 4 is in the form of a hard rotating rod which is rotatably mounted in a holder body 15. This holder body 15 is in turn fixed in a support structure 14, preferably arranged with an adjusting mechanism, which i.a. may be arranged to be able to control the pressure with which the rotating rod 4 is retained in the holding body 15.

På andra sidan pappersbanan 3, i förhållande till den roterande staven 4 finns anordnat en andra slutlig avstrykare 5, innefattande ett blad 50 med mjuk avstrykarkropp 51 med en fjädrande avstrykaryta 52. Materialet i kroppen väljs företrädesvis så att återfj ädringsvärdet är minst 50% enligt ASTM standard D2632, mer föredraget i intervallet 60 - 90%. På i sig konventionellt vis fasthålles bladet i en hållaranordning 12, vilken är anordnad med ett spår 13 för positionering av bladet 50.On the other side of the paper web 3, in relation to the rotating rod 4, a second final wiper 5 is arranged, comprising a blade 50 with a soft wiper body 51 with a resilient wiper surface 52. The material in the body is preferably selected so that the resilience value is at least 50% according to ASTM standard D2632, more preferably in the range 60 - 90%. In a conventional manner, the blade is held in a holding device 12, which is provided with a groove 13 for positioning the blade 50.

Hållaranordningen 12 är justerbart anordnad, så att linjettycket med vilket bladet 50 anlígger mot pappersbanan 3, och via denna mot den roterande staven 4, kan varieras. I syfte att uppnå de överraskande goda resultat som erhållits med hjälp av uppfinningen bör linj etrycket ligga inom området 0,25 N/lmm - 3,0 N/lmm, företrädesvis 0,5 N/lmm - 2,0 N/lmm. Dessutom bör hastigheten på banan 3 företrädesvis ligga inom området 0,8 m/sek - 33 m/sek, företrädesvis 1,6 m/sek - 25 m/sek. Vidare gäller för att erhålla nämnda överraskande resultat att hårdheten hos den anliggande ytan hos det mjuka bladet 50 bör vara inom området 50 Shore A - 95 Shore A, företrädesvis 60 Shore A - 90 Shore A.The holding device 12 is arranged adjustably, so that the line thickness with which the blade 50 abuts against the paper web 3, and via this against the rotating rod 4, can be varied. In order to achieve the surprisingly good results obtained by means of the invention, the line pressure should be in the range 0.25 N / lmm - 3.0 N / lmm, preferably 0.5 N / lmm - 2.0 N / lmm. In addition, the speed of the web 3 should preferably be in the range 0.8 m / sec - 33 m / sec, preferably 1.6 m / sec - 25 m / sec. Furthermore, in order to obtain said surprising result, the hardness of the abutting surface of the soft blade 50 should be in the range 50 Shore A - 95 Shore A, preferably 60 Shore A - 90 Shore A.

I Fig. 3 visas ett modifierat utförande av en anordning enligt uppfinningen. En modifiering består i att en arman form av mjuk avstrykaranordning 5 nyttjas än den som visas i Fig. 1 och 2. Istället för ett i sig känt konventionellt blad nyttjas här en ny slags 10 15 53.? 595 avstrykaranordníng som finns beskriven i detalj i WO 2007/061378, som härmed införes som referens i föreliggande ärende. I korthet framgår av figurerna att istället för konventionellt blad 50 med en mjuk kropp 51, nyttjas en vid bladet 50 anordnad roterbar enhet 53 vid vilken finns anordnad åtminstone en mjuk bladanordning 54, uppvisande den mjuka kontaktytan 52.Fig. 3 shows a modified embodiment of a device according to the invention. A modification consists in using a different form of soft wiper device 5 than the one shown in Figs. 1 and 2. Instead of a conventional blade known per se, a new kind of 53 is used here. 595 wiper device which is described in detail in WO 2007/061378, which is hereby incorporated by reference in the present case. In short, it appears from the figures that instead of a conventional blade 50 with a soft body 51, a rotatable unit 53 arranged at the blade 50 is used, in which at least one soft blade device 54 is arranged, having the soft contact surface 52.

I enlighet med tester som genomförts har det överraskande visat sig att -istället för ökande oliksidighet - oliksidigheten minskar, vid användning av mjukt blad mot roterande stav. Detta gäller såväl vid bestrykning av papper som kartong med ytvikter upp till ca 450 g/mz.In accordance with tests carried out, it has surprisingly been found that - instead of increasing indifference - the indifference decreases, when using a soft blade against a rotating rod. This applies to both coating of paper and cardboard with basis weights up to about 450 g / mz.

Uppfinningen begränsas inte av det ovan beskrivna utan kan varieras inom ramen för de efterföljande patentkraven. Det inses bla att både hård rullstav respektive mjuk rullstav kan nyttjas i samband med uppfinningen, varvid valet av slag av stav låter sig påverkas av rådande omständigheter. Vidare inses att många olika slags material respektive materialkombinationer kan nyttjas för att erhålla de materialegenskaper som önskas i syfte att uppfylla nödvändig funktionalitet hos den mjuka delen av avstrykaren S.The invention is not limited by what is described above but can be varied within the scope of the appended claims. It will be appreciated, inter alia, that both hard roller rod and soft roller rod can be used in connection with the invention, whereby the choice of type of rod can be influenced by prevailing circumstances. Furthermore, it is understood that many different kinds of materials and material combinations can be used to obtain the material properties desired in order to fulfill the necessary functionality of the soft part of the scraper S.

Claims (2)

1. 0 20 25 30 532 B96 PATENTKRAV1. 0 20 25 30 532 B96 PATENT REQUIREMENTS 1. Bestrykningsanordning för dubbelsidig bestrykning av papper och/eller kartong, omfattande en forsta bestrykningsanordning (1) anordnad att bestryka en första sida av en pappersbana (3) samt en andra bestrykningsanordning (2) anordnad att bestryka en andra sida av nämnda pappersbana (3) vilken första bestrykningsanordning (1) omfattar en första avstrykare (4) i form av en rullstav och vilken andra bestrykningsanordning (2) omfattar en andra avstrykare (5) i form av ett avstrykarblad, k ä n n e t e c k n a d av att nämnda andra avstrykare (5) är anordnad med en mjuk kontaktyta (52) mot pappersbanan (3), vilken kontaktyta (52) är anordnad med en ythårdhet i intervallet 50 Shore A - 95 Shore A. Bestrykningsanordning enligt patentkrav 1, k ä n n e t e c k n a d av att nämnda första avstrykare (4) är i form av en hård rullstav. Bestrykningsanordning enligt patentkrav 1, k ä n n e t e c k n a d av att nämnda forsta avstrykare (4) är i form av en mjuk rundstav. Bestrykningsanordning enligt något av ovanstående patentkrav, k ä n n e t e c k n a d av att nämnda mjuka kontaktyta (52) hos nämnda andra avstrykare (5) är anordnad med en ythårdhet i 60 Shore A - 95 Shore A. Bestrykningsanordning enligt patentkrav 4, k ä n n et e c k n a d av att nämnda avstrykare (5) är uppbyggt av ett material med ett återstudsande av minst 50%, enligt ASTM standard D263A coating device for double-sided coating of paper and / or cardboard, comprising a first coating device (1) arranged to coat a first side of a paper web (3) and a second coating device (2) arranged to coat a second side of said paper web (3). ) which first coating device (1) comprises a first scraper (4) in the form of a roller rod and which second coating device (2) comprises a second scraper (5) in the form of a scraper blade, characterized in that said second scraper (5) is provided with a soft contact surface (52) against the paper web (3), which contact surface (52) is provided with a surface hardness in the range 50 Shore A - 95 Shore A. Coating device according to claim 1, characterized in that said first scraper (4 ) is in the form of a hard roller rod. Coating device according to claim 1, characterized in that said first scraper (4) is in the form of a soft round rod. Coating device according to any one of the preceding claims, characterized in that said soft contact surface (52) of said second scraper (5) is provided with a surface hardness of 60 Shore A - 95 Shore A. Coating device according to claim 4, characterized in that that said scraper (5) is built of a material with a rebound of at least 50%, according to ASTM standard D263 2. Bestrykningsanordning enligt något av ovanstående patentkrav, k ä n n e t e c k n a d av att ansättningsvinkeln u mellan nämnda andra avstrykare (5) och pappersbanan (3) är 10-45°, företrädesvis 15 - 25°.Coating device according to one of the preceding claims, characterized in that the angle of application u between said second scraper (5) and the paper web (3) is 10-45 °, preferably 15 - 25 °.
SE0701666A 2007-07-09 2007-07-09 Coating device for double-sided coating of paper or cardboard SE532696C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0701666A SE532696C2 (en) 2007-07-09 2007-07-09 Coating device for double-sided coating of paper or cardboard
PCT/SE2008/050835 WO2009008820A1 (en) 2007-07-09 2008-07-04 Coating device for two-sided coating of paper or paperboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0701666A SE532696C2 (en) 2007-07-09 2007-07-09 Coating device for double-sided coating of paper or cardboard

Publications (2)

Publication Number Publication Date
SE0701666L SE0701666L (en) 2009-01-10
SE532696C2 true SE532696C2 (en) 2010-03-16

Family

ID=40228837

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0701666A SE532696C2 (en) 2007-07-09 2007-07-09 Coating device for double-sided coating of paper or cardboard

Country Status (2)

Country Link
SE (1) SE532696C2 (en)
WO (1) WO2009008820A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE301287B (en) * 1965-04-27 1968-05-27 Billingsfors Langed Ab Method and device for coating a paper web or a sheet material with a surface layer
SE348777B (en) * 1968-02-08 1972-09-11 Ethyl Corp
FI66042C (en) * 1980-10-08 1984-08-10 Waertsilae Oy Ab ANORDNING FOER BESTRYKNING AV BANA
US4577211A (en) * 1984-04-02 1986-03-18 Motorola, Inc. Integrated circuit and method for biasing an epitaxial layer

Also Published As

Publication number Publication date
SE0701666L (en) 2009-01-10
WO2009008820A1 (en) 2009-01-15

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