EP2213784A1 - Soleplate and iron comprising such a soleplate - Google Patents
Soleplate and iron comprising such a soleplate Download PDFInfo
- Publication number
- EP2213784A1 EP2213784A1 EP09151715A EP09151715A EP2213784A1 EP 2213784 A1 EP2213784 A1 EP 2213784A1 EP 09151715 A EP09151715 A EP 09151715A EP 09151715 A EP09151715 A EP 09151715A EP 2213784 A1 EP2213784 A1 EP 2213784A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- soleplate
- alloy
- steam generator
- iron
- substrate
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F75/00—Hand irons
- D06F75/38—Sole plates
Definitions
- the present invention relates to a soleplate for an iron and an iron comprising such a soleplate.
- Irons for ironing clothes are provided with a soleplate, which is the element of the iron that is in contact with the fabric being ironed.
- the soleplate is heated by a heating element, which conventionally is formed by an ohmic resistance.
- the soleplate thus has to have good thermal conduction.
- the iron comprises a steam generator, in which case the soleplate comprises steam outlets.
- the soleplate's outer surface should slide smoothly on the fabric and has to be able to cope with both high temperatures and sudden changes in temperature. Moreover, the soleplate should be resistant to blows and scratches.
- Soleplates are usually made of an aluminium substrate coated with a layer of stainless steel, anodized aluminium or enamelled aluminium.
- the aluminium substrate is used for its weight and thermal conductivity and the coating is used for protection against scratches.
- a soleplate according to claim 1 Namely, by a soleplate comprising a substrate made of a magnesium alloy, said alloy also comprising aluminium.
- the principal element of such an alloy is thus magnesium. Aluminium may thus be the second most important element in the alloy. It has been found that such an alloy exhibits advantageous properties, such as good thermal conductivity, light weight, and appropriate strength and stiffness. Furthermore, it has surprisingly been found that it is possible to manufacture a substrate of such a soleplate made of such an alloy that maintains a good connection with the heating element it covers. Besides, the alloy is sufficiently corrosion resistant.
- the substrate of the soleplate may further be protected by layers of different materials like silicon based coatings, anodized layers, etc.
- the substrate of the soleplate is made of the alloy AZ91D.
- Said alloy is one of the cheapest available magnesium-aluminium alloys.
- the alloy AZ91D comprises the following elements: 8.3 - 9.7 % of aluminium, 0.15 - 0.5% of manganese, 0.35 - 1.0 % zinc, maximum 0.1 % of silicon, maximum 0.03% copper, maximum 0.002% nickel, maximum 0.005 % of iron, and a maximum of 0.02% of other metals, and the rest magnesium (all percentages being weight percentages).
- said substrate is provided with an ironing face of a different material.
- Said ironing face may be formed by a separate element connected to the soleplate through fixation means or by a coating provided on the soleplate.
- the soleplate comprises an integrated steam generator.
- an iron comprises a soleplate and a separate steam generator with separate heating element.
- a similar configuration of an iron has been described in patent application EP 1561855 .
- the separate steam generator is made of a magnesium alloy, said alloy also comprising aluminium. In this way, the overall weight of the iron may further be reduced.
- Figure 1 shows a first embodiment of a soleplate 15 according to the present invention.
- Reference sign 2 is used to indicate the substrate of the soleplate made of an alloy of magnesium with aluminium.
- the soleplate 15 comprises an ironing face 1 (which actually comes into contact with the clothing to be ironed).
- the ironing face is formed by a separate element made of stainless steel.
- the stainless steel element has been folded over the soleplate. This can more clearly be seen in figure 4 .
- the ironing face may be made of a different material and/or thickness.
- the ironing face may be made of an aluminium element of 2mm with a hard anodized layer of 20-60 ⁇ m. Additionally it is possible that the ironing face does not constitute a separate element as such, but merely is a coating on the bottom of the soleplate.
- Figure 1 furthermore shows that in this embodiment, the soleplate 15 comprises an integrated steam generator 12.
- the chamber 12a of the steam generator may be filled with water through water inlet 9 (see figure 2 ).
- the steam generator 12 furthermore comprises a lid 12b.
- a heating element 3 is provided for heating up the soleplate, and simultaneously (in this embodiment) heating up the water in chamber 12a.
- Heating element 3 may suitably be formed by an ohmic resistance with a metal sheath.
- Said metal sheath may be made of an iron alloy.
- the heating element is heated up. This in turn heats up its metal sheath, the substrate of the soleplate 2, ironing face 1 and the water in steam generator chamber 12a. Steam can thus be generated in steam generator 12.
- Figures 3 and 4 further illustrate how the steam generated in steam generator 12 is finally vented through steam outlets 1a provided in the soleplate and ironing face.
- Figure 4 also illustrates the use of sealing 7, which may be formed as a layer of silicone, for avoiding leaks of water and/or steam.
- FIG. 5 shows a second embodiment of a soleplate according to the present invention.
- substrate 2 comprises an ironing face 1, formed by a separate element that is connected to the substrate 2 through the use of fasteners 4, 5, 6.
- the separate element 1 is fastened to the substrate through bolts 4 and corresponding nuts.
- ironing face 1 may be connected through a pin 5 and fitting washer 6.
- an adhesive may further be applied between ironing face 1 and the bottom of substrate 2.
- suitable fasteners e.g. other suitable bolts and nuts, only adhesives, suitable screws
- suitable fasteners e.g. other suitable bolts and nuts, only adhesives, suitable screws
- a separate steam generator 10 is provided.
- the separate steam generator 10 comprises a lid 10a which is connected to the body of the steam generator by pins 14.
- other types of fasteners may be used for fastening the lid of the steam generator to the body of the steam generator.
- Steam generator 10 in this embodiment is connected to the soleplate at a front attachment 13a and a rear attachment 13b.
- the soleplate comprises a front protruding pin and a rear protruding pin, which may be fitted in mating holes on respectively a front and rear flange of the separate steam generator 10. This is more clearly illustrated in figure 6 .
- the separate steam generator 10 may also be made of a magnesium alloy, said alloy also comprising aluminium. Weight savings etc. may accordingly also be achieved in the separate steam generator, not only in the soleplate.
- a separate heating element 11, dedicated to steam generation is furthermore provided.
- the steam formed in this process passes through an outlet 8 of the soleplate, to finally be vented through outlet holes 1a.
- These outlet holes 1a are provided in embossments 1b which serve as channels for distributing the steam over the ironing face (see figure 10 ).
- Figure 7 further indicates how the heating element 3 is embedded in soleplate substrate 2.
- Reference sign 3a is used to indicate a pin which may be connected through suitable cables or soldering to a source of electric current.
- Reference sign 3b is used to indicate an isolating plug.
- Figure 8 highlights detail A, which is further shown in figure 9.
- Figure 9 shows heating element 3 provided in substrate 2. It furthermore shows ironing face 1, with embossments 1b.. Sealing 7 is provided to avoid water and/or steam leaks.
- the soleplate is made of a magnesium alloy, said alloy also comprising aluminium.
- Magnesium is thus the principal element of the alloy.
- Aluminium is another element of the alloy.
- Other elements may be other metals or non-metals.
- the alloy is AZ91D.
- AZ91D is an alloy that is particularly suitable for die casting.
- the substrate of the soleplate may be formed essentially in a die casting process comprising the following steps: negative moulds of either side of the soleplate are provided, in which the heating element (e.g. a resistance with a metal sheath) is positioned. The two moulds are thus combined into a single mould with the heating element properly positioned inside said mould.
- the molten alloy is thus injected into the mould and kept under appropriate pressure by forcing the two separate moulds together. The pressure is maintained until the alloy has solidified, after which the moulds are removed. The substrate subsequently undergoes minor treatments to e.g. remove scrap material.
- the substrate of the soleplate shown in figures 1-4 can thus be formed in a single die casting step.
- the embodiment shown in figures 5-10 comprises a separate steam generator and a separate heating element.
- the soleplate and the steam generator are formed in separate die casting processes.
- an iron according to the present invention furthermore comprises e.g. a suitable handle for holding the iron, controls for setting the temperature of the heating element(s), etc.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Irons (AREA)
- Surface Heating Bodies (AREA)
Abstract
Description
- The present invention relates to a soleplate for an iron and an iron comprising such a soleplate.
- Irons for ironing clothes are provided with a soleplate, which is the element of the iron that is in contact with the fabric being ironed. The soleplate is heated by a heating element, which conventionally is formed by an ohmic resistance. The soleplate thus has to have good thermal conduction. Often, the iron comprises a steam generator, in which case the soleplate comprises steam outlets.
- The soleplate's outer surface should slide smoothly on the fabric and has to be able to cope with both high temperatures and sudden changes in temperature. Moreover, the soleplate should be resistant to blows and scratches.
- Soleplates are usually made of an aluminium substrate coated with a layer of stainless steel, anodized aluminium or enamelled aluminium. In this case, the aluminium substrate is used for its weight and thermal conductivity and the coating is used for protection against scratches.
- The use of aluminium alloys in (substrates of) soleplates is also known.
US 5,105,525 for example describes using one of the alloys GD-AI Si 10 Mg, GD-AI Mg 9, GD-AI Si 12 or GD-AI Si 12(Cu). The ironing side of the soleplate body portion is subsequently coated with a hard nickel alloy.WO 01/82652 - There still exists a need for an improved soleplate. According to the invention, such a need is fulfilled by a soleplate according to
claim 1. Namely, by a soleplate comprising a substrate made of a magnesium alloy, said alloy also comprising aluminium. The principal element of such an alloy is thus magnesium. Aluminium may thus be the second most important element in the alloy. It has been found that such an alloy exhibits advantageous properties, such as good thermal conductivity, light weight, and appropriate strength and stiffness. Furthermore, it has surprisingly been found that it is possible to manufacture a substrate of such a soleplate made of such an alloy that maintains a good connection with the heating element it covers. Besides, the alloy is sufficiently corrosion resistant. However, in embodiments of the invention, the substrate of the soleplate may further be protected by layers of different materials like silicon based coatings, anodized layers, etc. - Preferably, the substrate of the soleplate is made of the alloy AZ91D. Said alloy is one of the cheapest available magnesium-aluminium alloys. The alloy AZ91D comprises the following elements: 8.3 - 9.7 % of aluminium, 0.15 - 0.5% of manganese, 0.35 - 1.0 % zinc, maximum 0.1 % of silicon, maximum 0.03% copper, maximum 0.002% nickel, maximum 0.005 % of iron, and a maximum of 0.02% of other metals, and the rest magnesium (all percentages being weight percentages).
- Preferably, said substrate is provided with an ironing face of a different material. Said ironing face may be formed by a separate element connected to the soleplate through fixation means or by a coating provided on the soleplate. By providing the soleplate with an ironing face (the face actually comes into contact with the clothing), the functions of the soleplate and the ironing face may be advantageously separated. The material of the ironing face may thus be chosen to be particularly smooth and scratch resistant.
- In some embodiments of the invention the soleplate comprises an integrated steam generator.
- In other embodiments of the invention, an iron comprises a soleplate and a separate steam generator with separate heating element. A similar configuration of an iron has been described in patent application
EP 1561855 . In these embodiments, preferably also the separate steam generator is made of a magnesium alloy, said alloy also comprising aluminium. In this way, the overall weight of the iron may further be reduced. - Particular embodiments of the present invention will be described in the following, only by way of non-limiting example, with reference to the appended drawings, in which:
-
Figure 1 is a perspective view of a first embodiment of a soleplate according to the present invention; -
Figure 2 shows a partly cut open view of the soleplate offigure 1 ; -
Figure 3 shows a perspective view of the bottom of the soleplate offigure 1 ; -
Figure 4 is a cross-section view of the soleplate offigure 1 -
Figure 5 is a perspective view of a second embodiment of a soleplate according to the invention, the iron furthermore comprising a separate steam generator; -
Figure 6 is a perspective view of the soleplate offigure 5 ; -
Figure 7 shows a partly cut open view of the soleplate offigure 5 ; -
Figure 8 shows a soleplate offigure 5 indicating a detail A ; -
Figure 9 shows a perspective view of the cross-section of detail A, indicated infigure 8 ; -
Figure 10 shows a perspective view of the bottom of a soleplate offigure 5 ; -
Figure 1 shows a first embodiment of asoleplate 15 according to the present invention.Reference sign 2 is used to indicate the substrate of the soleplate made of an alloy of magnesium with aluminium. Thesoleplate 15 comprises an ironing face 1 (which actually comes into contact with the clothing to be ironed). In this embodiment, the ironing face is formed by a separate element made of stainless steel. The stainless steel element has been folded over the soleplate. This can more clearly be seen infigure 4 . - In other embodiments of the invention, the ironing face may be made of a different material and/or thickness. For example, the ironing face may be made of an aluminium element of 2mm with a hard anodized layer of 20-60µm. Additionally it is possible that the ironing face does not constitute a separate element as such, but merely is a coating on the bottom of the soleplate.
-
Figure 1 furthermore shows that in this embodiment, thesoleplate 15 comprises an integratedsteam generator 12. In use, thechamber 12a of the steam generator may be filled with water through water inlet 9 (seefigure 2 ). Thesteam generator 12 furthermore comprises alid 12b. Aheating element 3 is provided for heating up the soleplate, and simultaneously (in this embodiment) heating up the water inchamber 12a. - Heating
element 3 may suitably be formed by an ohmic resistance with a metal sheath. Said metal sheath may be made of an iron alloy. By administering current through said resistance, the heating element is heated up. This in turn heats up its metal sheath, the substrate of thesoleplate 2, ironingface 1 and the water insteam generator chamber 12a. Steam can thus be generated insteam generator 12. -
Figures 3 and 4 further illustrate how the steam generated insteam generator 12 is finally vented throughsteam outlets 1a provided in the soleplate and ironing face.Figure 4 also illustrates the use of sealing 7, which may be formed as a layer of silicone, for avoiding leaks of water and/or steam. -
Figure 5 shows a second embodiment of a soleplate according to the present invention. In this embodiment,substrate 2 comprises anironing face 1, formed by a separate element that is connected to thesubstrate 2 through the use offasteners separate element 1 is fastened to the substrate throughbolts 4 and corresponding nuts. In the embodiment shown infigure 5 , in the centre of the soleplate, ironingface 1 may be connected through apin 5 andfitting washer 6. Optionally, an adhesive may further be applied between ironingface 1 and the bottom ofsubstrate 2. Within the scope of the present invention, other suitable fasteners (e.g. other suitable bolts and nuts, only adhesives, suitable screws) may also be used. - In contrast to the embodiments shown in
figures 1-4 , aseparate steam generator 10 is provided. Theseparate steam generator 10 comprises alid 10a which is connected to the body of the steam generator by pins 14. In other embodiments of the invention, other types of fasteners may be used for fastening the lid of the steam generator to the body of the steam generator.Steam generator 10 in this embodiment is connected to the soleplate at afront attachment 13a and arear attachment 13b. To this end, the soleplate comprises a front protruding pin and a rear protruding pin, which may be fitted in mating holes on respectively a front and rear flange of theseparate steam generator 10. This is more clearly illustrated infigure 6 . - In embodiments of the invention, the
separate steam generator 10 may also be made of a magnesium alloy, said alloy also comprising aluminium. Weight savings etc. may accordingly also be achieved in the separate steam generator, not only in the soleplate. - In this embodiment, water enters the
separate steam generator 10 throughinlet 9. Aseparate heating element 11, dedicated to steam generation is furthermore provided. The steam formed in this process passes through an outlet 8 of the soleplate, to finally be vented throughoutlet holes 1a. These outlet holes 1a are provided inembossments 1b which serve as channels for distributing the steam over the ironing face (seefigure 10 ). -
Figure 7 further indicates how theheating element 3 is embedded insoleplate substrate 2.Reference sign 3a is used to indicate a pin which may be connected through suitable cables or soldering to a source of electric current.Reference sign 3b is used to indicate an isolating plug. -
Figure 8 highlights detail A, which is further shown infigure 9. Figure 9 showsheating element 3 provided insubstrate 2. It furthermore shows ironingface 1, withembossments 1b..Sealing 7 is provided to avoid water and/or steam leaks. - According to the invention, the soleplate is made of a magnesium alloy, said alloy also comprising aluminium. Magnesium is thus the principal element of the alloy. Aluminium is another element of the alloy. Other elements may be other metals or non-metals.
- In a preferred embodiment, the alloy is AZ91D. AZ91D is an alloy that is particularly suitable for die casting. The substrate of the soleplate may be formed essentially in a die casting process comprising the following steps: negative moulds of either side of the soleplate are provided, in which the heating element (e.g. a resistance with a metal sheath) is positioned. The two moulds are thus combined into a single mould with the heating element properly positioned inside said mould.
- The molten alloy is thus injected into the mould and kept under appropriate pressure by forcing the two separate moulds together. The pressure is maintained until the alloy has solidified, after which the moulds are removed. The substrate subsequently undergoes minor treatments to e.g. remove scrap material.
- The substrate of the soleplate shown in
figures 1-4 can thus be formed in a single die casting step. The embodiment shown infigures 5-10 comprises a separate steam generator and a separate heating element. The soleplate and the steam generator are formed in separate die casting processes. - An improved soleplate is achieved with the present invention and the process hereinbefore described.
- Although not further illustrated in the figures, it will be clear to the skilled person that an iron according to the present invention furthermore comprises e.g. a suitable handle for holding the iron, controls for setting the temperature of the heating element(s), etc.
- For the sake of completeness, a complete list of reference signs used in the figures follows:
- 1
- ironing face
- 1a
- steam outlets
- 1b
- embossment
- 2
- soleplate substrate
- 3
- heating element of soleplate
- 3a
- pin
- 3b
- isolating plug
- 4
- bolt and nut
- 5
- pin
- 6
- washer
- 7
- sealing
- 8
- steam passage
- 9
- water inlet
- 10
- separate steam generator
- 10a
- lid of separate steam generator
- 11
- heating element
- 12
- integrated steam generator
- 12a
- chamber of integrated steam generator
- 12b
- lid of integrated steam generator
- 13a
- front attachment point between soleplate and steam generator
- 13b
- rear attachment point between soleplate and steam generator
- 14
- pin of steam generator lid
- 15
- soleplate
Claims (10)
- Soleplate for an iron characterized in that a substrate (2) of the soleplate (15) is made of a magnesium alloy, said alloy also comprising aluminium.
- Soleplate according to claim 1, characterised in that the substrate (2) of the soleplate (15) is made of the alloy AZ91D.
- A soleplate according to claim 1 or 2, characterised in that the substrate (2) of the soleplate (15) is provided with an ironing face (1) of a different material.
- A soleplate according to claim 3, in which said ironing face (1) is a separate element connected to the substrate (2) by fasteners (4,5,6).
- A soleplate according to claim 3, in which said ironing face (1) is a coating provided on the substrate (2).
- Iron comprising a soleplate according to any previous claim.
- An iron according to claim 6, characterised in that the soleplate (15) comprises an integrated steam generator (12).
- An iron according to claim 6, characterised in that the iron furthermore comprises a separate steam generator (10) and separate heating element (11).
- An iron according to claim 8, characterised in that said separate steam generator (10) is made of a magnesium alloy, said alloy also comprising aluminium.
- Iron according to claim 9, characterised in that the separate steam generator (10) is made of the alloy AZ91 D.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09151715.1T ES2538681T3 (en) | 2009-01-30 | 2009-01-30 | Sole and iron comprising such sole |
EP20090151715 EP2213784B1 (en) | 2009-01-30 | 2009-01-30 | Soleplate and iron comprising such a soleplate |
PCT/EP2010/050953 WO2010086341A1 (en) | 2009-01-30 | 2010-01-27 | Soleplate and iron comprising such a soleplate |
CN201080005838XA CN102301065A (en) | 2009-01-30 | 2010-01-27 | Soleplate and iron comprising such a soleplate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090151715 EP2213784B1 (en) | 2009-01-30 | 2009-01-30 | Soleplate and iron comprising such a soleplate |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2213784A1 true EP2213784A1 (en) | 2010-08-04 |
EP2213784B1 EP2213784B1 (en) | 2015-03-11 |
Family
ID=40792767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090151715 Not-in-force EP2213784B1 (en) | 2009-01-30 | 2009-01-30 | Soleplate and iron comprising such a soleplate |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2213784B1 (en) |
CN (1) | CN102301065A (en) |
ES (1) | ES2538681T3 (en) |
WO (1) | WO2010086341A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB733981A (en) * | 1953-05-21 | 1955-07-20 | Fairchild Engine & Airplane | Bimetallic articles and method of making same |
US5105525A (en) | 1988-08-25 | 1992-04-21 | Braun Aktiengesellschaft | Process for making a smoothing iron soleplate |
EP1022374A1 (en) * | 1999-01-22 | 2000-07-26 | Braun GmbH | Iron and method of producing an iron |
WO2001082652A1 (en) | 2000-04-21 | 2001-11-01 | Seb S.A. | Heating element on an aluminium substrate for household appliance |
EP1561855A1 (en) | 2004-01-30 | 2005-08-10 | Celaya, Emparanza Y Galdos, Internacional, S.A. | Improvements to domestic steam irons having a vaporisation chamber and fitted with independent heating elements |
JP2007291447A (en) * | 2006-04-25 | 2007-11-08 | Toyota Motor Corp | Sliding component made of magnesium alloy |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB410665A (en) * | 1932-09-15 | 1934-05-24 | British Thomson Houston Co Ltd | Improvements in and relating to electric flat-irons |
BR9607163A (en) * | 1995-02-01 | 1997-11-11 | Seb Sa | Heating element with diffuser plate and assembly process of said set |
SG91330A1 (en) * | 2001-02-17 | 2002-09-17 | Gintic Inst Of Mfg Technology | Iron and sole plate for an iron |
JP3646076B2 (en) * | 2001-06-19 | 2005-05-11 | 直本工業株式会社 | All steam iron |
-
2009
- 2009-01-30 EP EP20090151715 patent/EP2213784B1/en not_active Not-in-force
- 2009-01-30 ES ES09151715.1T patent/ES2538681T3/en active Active
-
2010
- 2010-01-27 WO PCT/EP2010/050953 patent/WO2010086341A1/en active Application Filing
- 2010-01-27 CN CN201080005838XA patent/CN102301065A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB733981A (en) * | 1953-05-21 | 1955-07-20 | Fairchild Engine & Airplane | Bimetallic articles and method of making same |
US5105525A (en) | 1988-08-25 | 1992-04-21 | Braun Aktiengesellschaft | Process for making a smoothing iron soleplate |
EP1022374A1 (en) * | 1999-01-22 | 2000-07-26 | Braun GmbH | Iron and method of producing an iron |
WO2001082652A1 (en) | 2000-04-21 | 2001-11-01 | Seb S.A. | Heating element on an aluminium substrate for household appliance |
EP1561855A1 (en) | 2004-01-30 | 2005-08-10 | Celaya, Emparanza Y Galdos, Internacional, S.A. | Improvements to domestic steam irons having a vaporisation chamber and fitted with independent heating elements |
JP2007291447A (en) * | 2006-04-25 | 2007-11-08 | Toyota Motor Corp | Sliding component made of magnesium alloy |
Also Published As
Publication number | Publication date |
---|---|
CN102301065A (en) | 2011-12-28 |
WO2010086341A1 (en) | 2010-08-05 |
ES2538681T3 (en) | 2015-06-23 |
EP2213784B1 (en) | 2015-03-11 |
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