WO2013017441A1 - Verfahren und vorrichtung zur trocknung eines auf ein substrat aufgetragenen fluidfilms - Google Patents
Verfahren und vorrichtung zur trocknung eines auf ein substrat aufgetragenen fluidfilms Download PDFInfo
- Publication number
- WO2013017441A1 WO2013017441A1 PCT/EP2012/064305 EP2012064305W WO2013017441A1 WO 2013017441 A1 WO2013017441 A1 WO 2013017441A1 EP 2012064305 W EP2012064305 W EP 2012064305W WO 2013017441 A1 WO2013017441 A1 WO 2013017441A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- heat source
- transport
- substrate
- fluid film
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
- F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
- F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
Definitions
- the invention relates to a method and an apparatus for drying a fluid film applied to a substrate which contains a vaporizable liquid.
- the web-shaped goods may be, for example, paper, plastic films, textiles or metal strips.
- a fluid film is applied, which is a
- the object of the invention is to eliminate the disadvantages of the prior art.
- a method and a device are to be specified with which a fluid film applied to a substrate can be dried while avoiding mottling phenomena and with improved efficiency, without having to move large amounts of air.
- This object is solved by the features of claims 1 and 16.
- Advantageous embodiments of the invention will become apparent from the features of claims 2 to 15 and 17 to 26.
- Discharging the vaporized liquid by creating a flow directed from the fluid film towards the heat source.
- the liquid is substantially evaporated by means of a heat source provided opposite the substrate. This eliminates the effort to heat the drying gas. The further effort for cleaning or regeneration of the drying gas can be significantly reduced.
- drying rates of up to 20 g / m 2 s can be achieved. This corresponds to about 10 times those drying rates, which are achieved by the methods known in the prior art.
- the heating surface of the heat source is arranged in a further departure from the prior art only at a distance of 0.1 mm to 15.0 mm, preferably 0.2 to 5.0 mm, opposite the substrate surface, the heat in the inventions ⁇ to the invention Method essentially supplied by direct heat conduction to the fluid film.
- the fluid film facing the heating surface of its boundary surface from being heated in the direction of Substratoberflä ⁇ surface.
- a particularly effec ⁇ tive evaporation or diffusion of the liquid can be achieved.
- the vaporized liquid is removed in the direction of the heat source by the applied temperature gradient. Ie. the evaporated liquid flows Wesentli ⁇ chen perpendicular from the interface, and then passes into egg nen by the boundary surface and the heating surface formed Ka ⁇ nal. It is largely avoided within the fluid film, the generation of a substantially parallel to the interface directed flow with high amounts of air. As a result, no mottling phenomena occur in the fluid film in the method according to the invention.
- a gas flow is generated in the ge ⁇ formed between the heating surface and the interface channel for discharging the evaporated liquid opposite to the transport direction of the substrate.
- the gas flow may be generated, for example, by a suction device which is provided at the upstream end of the channel.
- the evaporated liquid is moved in the direction of each upstream upstream heat source.
- a Strömungsgeschwindig ⁇ ness of the guided in the opposite direction to the transport direction of the substrate flow of gas is preferably 2 cm / s to 30 m / s, preferably 10 cm / s to 10 m / s.
- the Strömungsgeschwin ⁇ speed of the gas depends on the length of the channel and the quantitative ge of liquid to be evaporated. If the evapora- to ⁇ Fende liquid is flammable, should be selected as a gas, an inert gas.
- a first temperature-temperature T G is controlled as a function of the heating surface in an interfacial ⁇ temperature Ti of the fluid film.
- the first temperature T G is adjusted so that the required Abtrans ⁇ port of the liberated fluid vapor from the surface ge is ensured.
- the heat is advantageously transferred from the heating surface to the fluid film essentially by direct heat conduction.
- the first temperature T G is suitably controlled in the range of 50 ° C to 300 ° C, preferably in the range of 80 ° C and 200 ° C.
- the transport surface is heated by means of a further heat source.
- a generated by the heat source further second temperature T H of the transport surface is advantageously regulated depending ⁇ ness of the interface temperature ⁇ .
- the second temperature T H can be regulated in particular such that the following relationship is fulfilled:
- the transport surface is heated to a second temperature T H ⁇ structure by means of a wide ⁇ ren heat source.
- the second temperature T H is set so that it is greater than the interface temperature Ti.
- a particularly large mass flow of the evaporated liquid is advantageously achieved when the Dif ⁇ difference ⁇ between the interface temperature ⁇ and the second temperature T H is in the range of 2 ° C to 30 ° C.
- the evaporation of the liquid egg in ⁇ ner non-combustible gas atmosphere, preferably nitrogen or carbon dioxide atmosphere ⁇ performed. This allows safe and reliable to avoid the ignition of vaporized within the trock ⁇ voltage device flammable liquid.
- the heating surface facing the substrate is at a distance from
- a thickness of the fluid film issverapt ⁇ Lich selected so that it is smaller than the aforesaid distance.
- the fluid film may have a thickness in the range of 5 ym to 200 ym, preferably 10 ym to 50 ym.
- the second temperature T H is controlled so that it is always smaller than the first temperature T G.
- a temperature difference between the first and the second temperature T G T H can in particular be regulated so that along the conveying device ⁇ a predetermined temperature difference profile provides a ⁇ .
- the temperature gradient or the temperature difference between the first T G and the second temperature T H can change along the transport direction in a predetermined manner. This takes into account the fact that the amount of liquid to be evaporated decreases in the transport direction.
- the change of the temperature gradient can be achieved by suitable regulation of the first T G and / or second temperature T H or also be effected by changing the distance of the heating surface from the interface.
- a flow-through heat source is used as the heat source, and the vaporized liquid is performed by the heat source to pass from ⁇ .
- the evaporated liquid in ⁇ We sentlichen can be discharged vertically from the surface of the fluid film and the interface.
- a heat source is suitably an electrical heating ⁇ source, preferably a heating source equipped with resistance heating wires used. In this case can for example be arranged lattice-like, the resistance heating ⁇ wires.
- a heat exchanger may be designed to be flowed through like a radiator for motor vehicles. It is also possible to provide a plurality of heat exchangers in succession in the transport direction, it being possible for a gap to be provided between the heat exchangers in each case. Through the gap, the vaporized liquid can be removed from the surface of the fluid film.
- At least one rotatable roller is used as a transport device, whose lateral surface forms the transport surface.
- the heat source is configured corresponding to the lateral surface of the roller, that is, a heating surface of the heat source is at a predetermined small distance from the Mantelflä- arranged.
- the further heat source is arranged inside the roller.
- the transport surface is heated by an underside of the transport device opposite the substrate, preferably by means of direct heat conduction.
- the transport surface can be electrically heated by means of resistance heating elements.
- Such an electric heater allows a particularly simple control of the temperature of the trans ⁇ port surface.
- an apparatus for drying a fluid film containing a vaporizable liquid applied to a substrate surface comprising: a transport device for transporting the substrate on a transport surface along a transport direction, a heat source provided with a heating surface opposite the substrate; which is located at a distance of 0.1 mm to 15.0 mm opposite to the substrate surface, and means for generating a directed from the fluid film in the direction of the heat source flow.
- the proposed device enables efficient drying of a fluid film applied to a substrate.
- the liquid is evaporated by a heat source provided opposite the substrate.
- the heat source is in departure from the prior art only at a distance of 0.1 to 15.0 mm, preferably 0.1 to 5.0 mm, arranged from the substrate surface.
- the evaporated liquid is dissipated by generating a directed from the substrate in the direction of the heat source flow.
- a device for discharging the evaporated liquid is provided.
- a further heat source for heating the transport surface is provided.
- the further heat source is suitably provided at a tung the sub ⁇ strat opposite "bottom" of the Transportvorrich-. It may be, for example, a resistance heater.
- a first control means for controlling a testified to the heating surface ER- first temperature T G is provided in response to a Grenzflä ⁇ chentemperatur Ti of the fluid film.
- the controlled variable namely, the first temperature T G of the heating surface is Bennett- according to a predetermined algorithm in dependence of the Grenzflä ⁇ chentemperatur Ti which constitutes the command variable represents.
- the first temperature T G can for example be controlled so that a predetermined temperature gradient is formed between the boundary surface tempera ture ⁇ Ti and the first temperature T G.
- a second control device is advantageously provided for controlling a second temperature T H of the transport surface as a function of the interface temperature ⁇ . In this case, the interface temperature ⁇ is measured as a reference variable. Depending on the measured interface temperature ⁇ is the second by means of the control device
- Temperature T H set or tracked.
- the adjustment or the tracking of the second temperature T H occurs expediently such that a predetermined interface temperature ⁇ Ti is kept substantially constant.
- the first T G and the second temperature T H can be measured, for example, by means of conventional thermocouples.
- the interface temperature ⁇ can contactlessly be detected by means of an infrared measuring device Example ⁇ example.
- the first control device can also be omitted.
- the first temperature T G is kept constant.
- the first and second control means may also be gekop ⁇ pelt.
- a temperature gradient between the first T G and the second temperature T H can be regulated in accordance with a further predetermined algorithm so that along the transport direction a predetermined temperature difference profile is established between the transport surface and the heating surface.
- FIG. 3 shows the interface temperature over the transport surface temperature at a given gas temperature
- 4 shows the mass diffusion rate over the gas temperature at a predetermined transport surface temperature
- FIG. 5 shows the mass diffusion rate over the transport surface temperature at a given gas temperature
- Fig. 8 is a schematic sectional view through an exemplary embodiment of an inventive diffusion ⁇ dryer
- FIG. 9 shows a schematic detail view according to FIG. 8 and FIG. 10 shows a schematic sectional view through a further one
- Embodiment of a Diffu ⁇ sionstrockners invention Embodiment of a Diffu ⁇ sionstrockners invention.
- the interface temperature Tj ie the temperature at the free surface of the fluid film
- the mass diffusion rate per unit area based on the temperature gradient at the free surface can be calculated as follows:
- the drying time for the material to be coated can be calculated as follows:
- a L 0.6 W / (mK)
- p L 1000 kg / m 3
- a / i iH 2260 KJ / kg
- the drying of the fluid film according to the invention is determined in Wesent ⁇ union by a control of the second temperature T H to the conveying surface and by the first temperature T G of the heat source.
- the heat source is at a distance ⁇ G of the gas phase facing interface of the fluid film ⁇ introduced .
- FIG. 2 shows the interface temperature T j above the first temperature T G of the heat source or gas phase.
- 3 shows the interface temperature T j above the temperature T H of the transport surface.
- the mass diffusion rate can be achieved by increasing the first temperature Tem ⁇ T G. It can also be seen that an increase in the second temperature T H causes a reduction in the mass diffusion rate. As can be seen in particular from FIGS. 6 and 7, a reduction of the drying time can be achieved if the second temperature T H is small and the first temperature T G is selected to be high. Both temperatures T G and T H are adjustable so that T ⁇ can be controlled. T j can z. B. be kept at room temperature.
- Fig. 8 shows a schematic sectional view of an exporting ⁇ approximately example of a diffusion dryer according to the invention.
- a housing 1 In a housing 1 is a supply roller 2, on which the substrate 3 to be coated is received. The substrate 3 is guided over first tension rollers 4a, 4b on a transport roller 5.
- a cladding or transport surface 6 of the transport roller 5 is ⁇ sections, preferably surrounded over an angle of 180-270 °, by a drying device. 7
- a slot nozzle tool designated by the reference numeral 8 is provided for applying a fluid film F to the substrate 3.
- the drying device 7 is situated at least one further tension roller 9, over which the substrate is wound onto a roll 10.
- Reference numeral 11 designates a roller cleaning device, which is arranged downstream of the drying device 7 and upstream of the coating tool 8.
- the drying device 7 has a further housing 12.
- the further housing 12 is provided with suction devices 14, with which a liquid vapor escaping from the fluid film F is extracted.
- a heat source 13 accommodated in the further housing 12 can be formed, for example, from resistance heating wires, which are arranged like a lattice.
- the heating wires form one Heating surface G, which is arranged at a distance 6 G, for example, 0.1 mm to 1.0 mm opposite the interface I of the fluid film F. 9, a substantially perpendicular to the transport surface 6 forming flow, which is indicated in Fig. 9 by arrows.
- a negative pressure in the space between the interface I and the heating surface H is advantageously generated. This avoids the escape of any combustible liquid vapors into the environment.
- the housing 1 can also be flushed with a protective gas atmosphere in order to avoid a risk of fire or explosion due to the escape of the combustible liquid vapors.
- the apparatus shown in Fig. 8 according to the invention is constructed be ⁇ Sonders compact. Instead of a transport roller 5, a plurality of transport rollers 5 can be used. Thus, a drying section can be increased, which is a
- the device according to the invention can also be used in combination with conventional convection dryers.
- the device according to the invention is expediently used upstream of a conventional convection dryer.
- FIG. 10 Shown in the embodiment shown in FIG. 10 schematic sectional view through a further embodiment of an inventive ⁇ SEN diffusion dryer and a further drying device 15.
- the substrate 3 is in turn received on a supply roll 2; it is done with an Benen roller 16 transported.
- the reference numeral 8 again denotes a slot nozzle tool for applying a fluid film to the substrate 3, which is arranged upstream of a further drying device 15.
- the further drying device 15 comprises in transport ⁇ direction T heating elements 17, which may be in the transport direction T successively arranged plate-shaped resistance heating.
- the heating elements 17 form a substantially closed heating surface H which is arranged at a distance ⁇ G of 2 to 10 mm from a substrate surface.
- the further drying device 15 thus has a rectangular channel K with the height ⁇ G , through which the substrate 3 is guided in the transport direction T.
- a flow rate is for example 30 cm / s to 3 m / s.
- a further transport surface 18 of the further drying device 15 is embodied here. It can also be configured ⁇ heated (not shown here). Reference sign list
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2014107511A RU2647192C2 (ru) | 2011-08-01 | 2012-07-20 | Способ и устройство для сушки жидкой пленки, нанесенной на подложку |
EP12741294.8A EP2739923B1 (de) | 2011-08-01 | 2012-07-20 | Verfahren und vorrichtung zur trocknung eines auf ein substrat aufgetragenen fluidfilms |
CN201280038430.1A CN103814266B (zh) | 2011-08-01 | 2012-07-20 | 干燥被施用于基底的流体膜的方法和装置 |
JP2014523279A JP2014527148A (ja) | 2011-08-01 | 2012-07-20 | 基材に形成した流動性フィルムを乾燥させる方法および装置 |
US14/234,708 US9851144B2 (en) | 2011-08-01 | 2012-07-20 | Method and device for drying a fluid film applied to a substrate |
KR1020147005107A KR20140068039A (ko) | 2011-08-01 | 2012-07-20 | 기판에 도포된 유체막을 건조하는 방법 및 장치 |
CA2843492A CA2843492A1 (en) | 2011-08-01 | 2012-07-20 | Method and device for drying a fluid film applied to a substrate |
BR112014002515A BR112014002515A2 (pt) | 2011-08-01 | 2012-07-20 | método e dispositivo para secar um filme de fluido aplicado a um substrato |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110080222 DE102011080222A1 (de) | 2011-08-01 | 2011-08-01 | Verfahren und Vorrichtung zur Trocknung eines auf ein Substrat aufgetragenen Fluidfilms |
DE102011080222.3 | 2011-08-01 | ||
DE102012210431.3 | 2012-06-20 | ||
DE102012210431 | 2012-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013017441A1 true WO2013017441A1 (de) | 2013-02-07 |
Family
ID=46601782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/064305 WO2013017441A1 (de) | 2011-08-01 | 2012-07-20 | Verfahren und vorrichtung zur trocknung eines auf ein substrat aufgetragenen fluidfilms |
Country Status (10)
Country | Link |
---|---|
US (1) | US9851144B2 (de) |
EP (1) | EP2739923B1 (de) |
JP (1) | JP2014527148A (de) |
KR (1) | KR20140068039A (de) |
CN (1) | CN103814266B (de) |
BR (1) | BR112014002515A2 (de) |
CA (1) | CA2843492A1 (de) |
PL (1) | PL2739923T3 (de) |
RU (1) | RU2647192C2 (de) |
WO (1) | WO2013017441A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018130440A1 (de) | 2017-11-30 | 2019-06-06 | Mitsubishi Hitec Paper Europe Gmbh | Vorrichtung zur Trocknung eines auf ein Substrat aufgebrachten Fluidfilms sowie Verfahren damit und getrocknetes Substrat |
DE102017128397A1 (de) | 2017-11-30 | 2019-06-06 | Mitsubishi Hitec Paper Europe Gmbh | Verfahren und Vorrichtung zum Herstellen eines beschichteten Substrats sowie beschichtetes Substrat |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201411483D0 (en) * | 2014-06-27 | 2014-08-13 | Batmark Ltd | Vaporizer Assembly |
CN109028872A (zh) * | 2018-07-02 | 2018-12-18 | 陈敏珍 | 一种布料加工用平台输送干燥装置 |
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US2272776A (en) * | 1936-07-24 | 1942-02-10 | Armstrong Cork Co | Apparatus for presetting wear films |
WO1982003450A1 (en) | 1981-03-27 | 1982-10-14 | Kodak Co Eastman | Method and apparatus for drying coated sheet material |
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2012
- 2012-07-20 WO PCT/EP2012/064305 patent/WO2013017441A1/de active Application Filing
- 2012-07-20 CA CA2843492A patent/CA2843492A1/en not_active Abandoned
- 2012-07-20 PL PL12741294.8T patent/PL2739923T3/pl unknown
- 2012-07-20 KR KR1020147005107A patent/KR20140068039A/ko not_active Application Discontinuation
- 2012-07-20 BR BR112014002515A patent/BR112014002515A2/pt not_active IP Right Cessation
- 2012-07-20 CN CN201280038430.1A patent/CN103814266B/zh active Active
- 2012-07-20 EP EP12741294.8A patent/EP2739923B1/de active Active
- 2012-07-20 JP JP2014523279A patent/JP2014527148A/ja active Pending
- 2012-07-20 US US14/234,708 patent/US9851144B2/en not_active Expired - Fee Related
- 2012-07-20 RU RU2014107511A patent/RU2647192C2/ru not_active IP Right Cessation
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US2272776A (en) * | 1936-07-24 | 1942-02-10 | Armstrong Cork Co | Apparatus for presetting wear films |
WO1982003450A1 (en) | 1981-03-27 | 1982-10-14 | Kodak Co Eastman | Method and apparatus for drying coated sheet material |
DE3900957A1 (de) | 1989-01-14 | 1990-07-19 | Hoechst Ag | Verfahren und vorrichtung zum trocknen einer auf einem durch eine trocknungszone bewegten traegermaterial aufgebrachten fluessigkeitsschicht |
DE3927627A1 (de) | 1989-08-22 | 1991-02-28 | Hoechst Ag | Verfahren und vorrichtung zum trocknen einer auf einem bewegten traegermaterial aufgebrachten fluessigkeitsschicht |
DE4433904A1 (de) * | 1993-09-22 | 1995-04-06 | Rockwell International Corp | Vorrichtung zum Erhitzen einer Druckbahn für eine Druckpresse |
US20070110894A1 (en) * | 2003-03-07 | 2007-05-17 | Nitto Denko Corporation | Method for drying coating film, and optical film |
US20060192317A1 (en) * | 2005-02-25 | 2006-08-31 | Paulson Jack E | Method and apparatus for drying coated sheet material |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018130440A1 (de) | 2017-11-30 | 2019-06-06 | Mitsubishi Hitec Paper Europe Gmbh | Vorrichtung zur Trocknung eines auf ein Substrat aufgebrachten Fluidfilms sowie Verfahren damit und getrocknetes Substrat |
DE102017128397A1 (de) | 2017-11-30 | 2019-06-06 | Mitsubishi Hitec Paper Europe Gmbh | Verfahren und Vorrichtung zum Herstellen eines beschichteten Substrats sowie beschichtetes Substrat |
Also Published As
Publication number | Publication date |
---|---|
EP2739923A1 (de) | 2014-06-11 |
US20140215844A1 (en) | 2014-08-07 |
CA2843492A1 (en) | 2013-02-07 |
JP2014527148A (ja) | 2014-10-09 |
BR112014002515A2 (pt) | 2017-03-14 |
US9851144B2 (en) | 2017-12-26 |
PL2739923T3 (pl) | 2016-12-30 |
RU2014107511A (ru) | 2015-09-10 |
CN103814266B (zh) | 2016-01-06 |
RU2647192C2 (ru) | 2018-03-14 |
KR20140068039A (ko) | 2014-06-05 |
CN103814266A (zh) | 2014-05-21 |
EP2739923B1 (de) | 2016-06-29 |
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