EP1675996B1 - Appareil electromenager pourvu d'un systeme d'introduction de produit de lavage dans le liquide de lavage - Google Patents

Appareil electromenager pourvu d'un systeme d'introduction de produit de lavage dans le liquide de lavage Download PDF

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Publication number
EP1675996B1
EP1675996B1 EP04791219A EP04791219A EP1675996B1 EP 1675996 B1 EP1675996 B1 EP 1675996B1 EP 04791219 A EP04791219 A EP 04791219A EP 04791219 A EP04791219 A EP 04791219A EP 1675996 B1 EP1675996 B1 EP 1675996B1
Authority
EP
European Patent Office
Prior art keywords
cleaning liquid
cleaning
washing
content
active substances
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.)
Not-in-force
Application number
EP04791219A
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German (de)
English (en)
Other versions
EP1675996A1 (fr
Inventor
Egbert Classen
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL04791219T priority Critical patent/PL1675996T3/pl
Publication of EP1675996A1 publication Critical patent/EP1675996A1/fr
Application granted granted Critical
Publication of EP1675996B1 publication Critical patent/EP1675996B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/37—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of metering of detergents or additives
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/023—Quantity or concentration of the consumable product
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/07—Consumable products, e.g. detergent, rinse aids or salt
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D06F2103/22—Content of detergent or additives
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/42—Detergent or additive supply

Definitions

  • the subject of the present invention is a household appliance, such as e.g. a dishwasher or washing machine, with a system for supplying detergent into the cleaning liquid and a method for operating the same.
  • a household appliance such as e.g. a dishwasher or washing machine, with a system for supplying detergent into the cleaning liquid and a method for operating the same.
  • washing operations are carried out in a washing machine or dishwasher during the cleaning program, wherein the washing liquor or the rinsing liquor is added to improve the cleaning result with washing-active substances.
  • a clear phase in which the rinse liquor is mixed with a rinse aid. So far, however, a fixed amount of washing or rinsing the cleaning liquid is added to the above household appliances.
  • surfactants are often used as detergent substances, which have the property of lowering the surface tension of liquids and thus increasing the cleaning effect.
  • the detergent activity of surfactants is highly dependent on their concentration. With increasing surfactant content, for example, the surface tension of the solution drops sharply until, after exceeding a certain, substance-specific limit, saturation occurs, so that a further increase in the concentration causes only slight changes in the surface tension of the solution.
  • the size of this limit depends on a number of factors, including temperature and the content of organic matter or ions in the solution. At a lower surfactant concentration, the intended cleaning effect is reduced; An increase above the optimal level, however, brings with it economic and environmental disadvantages.
  • the dosage of surfactants in the cleaning liquid is usually carried out by adding an empirical or prescribed amount.
  • a significantly increased dosage is often made to compensate for the consumption of surfactants that combine with contaminants.
  • the detergent is introduced, for example, in dishwashers before beginning the wash program (in a commercial household dishwashing about 25 g per cleaning process) in a designated container of a detergent dispenser and completely emptied by the program control during the flushing operation in the cleaning liquid.
  • Dishwashers are known in which the water hardness of the cleaning liquid is determined by suitable sensors in order to determine the added amount of rinse aid at the end of the washing program. Other criteria determining the amount of cleaning agent required, such as e.g. the load condition of the dishwasher or the present type of dirt of the items to be cleaned, but are not taken into account.
  • the washing machine according to the EP 1 063 340 A1 a sensor that allows the detection of the concentration of washing-active substances in the cleaning liquid by measuring the surface tension by means of the bubble pressure method. It is provided that during a wash program, the detergent concentration is gradually increased until a predetermined value is reached.
  • the object of the present invention is to eliminate the abovementioned disadvantages and to provide a dishwasher or washing machine with a device which takes into account the state of loading of the dishwasher or the type of dirt to be washed or washed, in order to obtain the quantity required for an optimal cleaning effect to determine and regulate wash-active substances in the cleaning fluid.
  • a system for supplying detergent into the cleaning liquid which comprises a sensor which detects the content of washing-active substance in the cleaning liquid during the cleaning operation, and a dosing device which supplies additional cleaning agents to the cleaning liquid when the content of washing-active substances is too low, or a dosing device which supplies fresh water to the cleaning liquid if the content of washing-active substances is too high.
  • the household machine has the advantage that the content of detergent substances in the cleaning liquid during the cleaning process continuously determined and on this basis the addition of detergent to the cleaning liquid regardless of influences such. Pollution degree, temperature and water hardness is controlled in order to achieve the optimum content of washing-active substances in the cleaning liquid. Thus both an underdose with insufficient cleaning effect and an overdose with negative economic and ecological consequences can be avoided. In this way, on the one hand, the duration of the washing or rinsing program, the cleaning performance and the consumption of resources are optimized and, on the other hand, the environmental influences are minimized.
  • the required amount of detergent can be determined independently of different active ingredients and thus independently of the manufacturer of the detergent and optimally dosed. This effect results from the function of the sensor, which determines only the concentration of washing-active substances in the cleaning liquid. This effect is particularly advantageous in combination with the use of an automatic dosing system in which a sufficient amount of detergent for several cleaning operations can be accommodated. During the cleaning process, the automatic dosing system only dispenses to the cleaning liquid the amount of cleaning agent required on the basis of the content of washing-active substances determined by the sensor.
  • the amount of cleaning agent delivered to the cleaning fluid during a cleaning process is only a fraction of the volume of cleaning agent that can be stored in the metering device. As a result, it is no longer necessary for the user to refill the reservoir of the metering device before each start of a cleaning cycle. Instead, the storage container of the metering device can also be filled only after a number of cleaning cycles when all the detergent stored in the storage container of the metering device has been used up.
  • the concentration of washing-active substances can change depending on the type and amount of (residual) contamination of the laundry or ware to be cleaned. Due to the continuous measurement of washing-active substances in the cleaning liquid conclusions can therefore be drawn regarding the nature and intensity of the (residual) contamination of the washing or ware.
  • the concentration of the washing-active substances can then be adjusted by supplying the cleaning fluid with either a certain volume of additional cleaning agent or a certain volume of fresh water.
  • a simple, dynamic measuring system for determining the content of washing-active substances (surfactants or surfactants) in the cleaning liquid is, for example, a tensiometer.
  • a signal proportional to the surface tension of the cleaning liquid is generated by the so-called bubble pressure method, which corresponds to the surfactant content in the cleaning fluid equivalent.
  • a bubble tensiometer according to the bubble pressure method has at least one capillary which leads into the cleaning liquid and from which a predetermined gas flow with a certain capillary pressure escapes into the liquid with the formation of bubbles.
  • the gas used is usually air, and in principle, other gases are used.
  • the bubble pressure method can also detect a decreasing concentration of surfactants in the cleaning fluid, for example during rinsing operations.
  • the accompanying drawing shows a diagram which changes the profile of the surface tension of an air bubble pressed into the cleaning liquid in the manner described above as a function of the surface age.
  • the x-axis of the graph plots the surface age from 0 to 600 ms, while the y-axis of the graph plots the surface age Surface tension of 20 to 80 mN / m.
  • a total of six curves are shown, which relate to different concentrations of surfactants or detergent substances in the cleaning liquid.
  • the uppermost curve 1 relates to a measurement of the surface tension of an air bubble submerged in pure water without detergent additive, which consequently has a surfactant content of 0 ml / l.
  • Curve 2 relates to a surfactant content of 1 ml / l in the cleaning fluid, curve 3 to a surfactant content of 2 ml / l in the cleaning fluid, curve 4 to a surfactant content of 3 ml / l in the cleaning fluid, curve 5 to a surfactant content of 5 ml / l in the cleaning fluid and curve 6 to a surfactant content of 10 ml / l in the cleaning fluid.
  • the curves shown in the diagram show that a higher concentration of surfactants or detergent substances in the cleaning liquid reduces the surface tension of an air bubble immersed in the cleaning liquid.
  • a surfactant content of 1 ml / l causes a surface tension of the air bubble immersed in the cleaning liquid of about 70 mN / m at a surface age of 100 ms to about 70 mN / m at a surface age of 600 ms
  • the surface tension becomes one into the cleaning liquid with a surfactant content of 10 ml / l submerged air bubble of about 48 mN / m at a surface age of 100 ms to about 37 mN / m with a surface age of 600 ms reduced.
  • the measurement of the surface tension by means of the above-described bubble printing method has the advantage that, due to the flat course of the surface tension as a function of the surface age, it reliably and relatively time-independent determination of the surface tension of the immersed in the cleaning liquid Bubble and thus the content of surfactants or detergent substances in the cleaning liquid allows.
  • a further advantage of this bubble pressure method is that the surface tension measured at the air bubble is largely independent of its depth of immersion in the cleaning fluid.
  • the determination of the content of washing-active substances in the cleaning liquid by a tensiometer by means of the bubble-pressure method is suitable to optimize the washing programs of dishwashers and washing machines by determining the surfactant content in the cleaning liquid according to the present invention and correcting it if necessary.
  • the content of washing-active substances (wetting agents or surfactants) in the cleaning liquid is determined by means of a suitable sensor, preferably a tensiometer or surfactant sensor, during the cleaning phase.
  • a suitable sensor preferably a tensiometer or surfactant sensor
  • This content of washing-active substances in the cleaning liquid determined by the surfactant sensor is then used in a metering system to optimize the content of washing-active substances in the cleaning liquid, for example adding the cleaning liquid with additional cleaning agent or further fresh water to the cleaning liquid already present in the household machine is supplied to reduce the concentration of the detergent substances in the cleaning liquid.
  • the evaluation of the signals supplied by the surfactant sensor and the evaluation of the content of washing-active substances in the cleaning liquid and the subsequent control of the supply of cleaning agent and / or fresh water is preferably carried out by an electronic control.
  • the content of washing-active substances in the cleaning liquid, determined by the sensor during the cleaning operation to be displayed via suitable display means, possibly assisted by an acoustic signal, and the operator independently carries out the addition of cleaning agents during the cleaning operation on the basis of the indicated concentration value ,
  • the underlying principle is therefore to make a continuous determination of the content of washing-active substances in the cleaning liquid during the cleaning process.
  • various automatic functions are already known, such as the automatic flow control of the washing program in dishwashers by an electronic control or the automatic control of the temperature of the cleaning liquid. According to the teaching of the present invention, it is now also possible to control and automatically regulate the content of washing-active substances during the cleaning phase.
  • the determination of the content of washing-active substances in the cleaning liquid takes place continuously or at least at short time intervals during the cleaning process.
  • the sensor for determining the content of washing-active substances in the domestic appliance should preferably be arranged so that it is as continuously as possible surrounded by cleaning liquid during the cleaning process. This allows the content of washing-active substances to be controlled directly during the cleaning process and the system to respond quickly to concentration fluctuations.
  • the reaction time for correcting the content of washing-active substances in the cleaning liquid can be further increased if the system for supplying detergent into the cleaning liquid is controlled by an electronic control unit depending on the content of washing-active substances in the cleaning liquid determined by the sensor.
  • the determination of the content of washing-active substances in the cleaning liquid can also be carried out from the signal supplied by the sensor via electronic means.
  • the cleaning process itself is also regulated as a function of the determined by the sensor content of washing-active substances in the cleaning liquid. It can be provided, for example, that at least part of the cleaning process is repeated in dependence on the determined by the sensor content of washing-active substances in the cleaning liquid. This makes it possible for the cleaning process to be repeated or prolonged if the determination of the content of washing-active substances in the cleaning liquid or its time course determines that the soiling of the laundry or ware to be cleaned requires a more intensive cleaning process.
  • the cleaning process is omitted or terminated in the cleaning liquid as a function of the content of washing-active substances determined by the sensor. This gives the possibility that the cleaning process is abbreviated or aborted prematurely, if it is determined via the determination of the content of washing-active substances in the cleaning liquid or its time course, that the contamination of the laundry or items to be cleaned is low and requires only a short cleaning process.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (9)

  1. Appareil ménager qui est apte à exécuter au moins une opération de nettoyage en utilisant un liquide de nettoyage, comprenant un système d'introduction de produit de lavage dans le liquide de nettoyage et comprenant un capteur qui détecte la teneur en substances de lavage actives dans le liquide de nettoyage pendant l'opération de nettoyage, caractérisé par un dispositif de dosage qui, lorsque la teneur en substances de lavage actives du liquide de nettoyage est trop élevée, introduit de l'eau fraîche.
  2. Appareil ménager selon la revendication 1, caractérisé en ce que le capteur est un capteur de tensioactifs, qui détecte la teneur en substances de lavage actives dans le liquide de nettoyage au moyen du procédé à pression de bulles.
  3. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que le capteur de tensioactifs est disposé dans l'appareil ménager, de préférence de manière à ce qu'il soit entouré si possible de manière continue de liquide de nettoyage pendant l'opération de nettoyage.
  4. Procédé de fonctionnement d'un appareil ménager qui est apte à exécuter au moins une opération de nettoyage en utilisant un liquide de nettoyage, comprenant un système d'introduction de produit de lavage dans le liquide de nettoyage selon l'une quelconque des revendications précédentes, la teneur en substances de lavage actives dans le liquide de nettoyage pendant l'opération de nettoyage étant détectée, caractérisé en ce que, lorsque la teneur en substances de lavage actives du liquide de nettoyage est trop élevée, de l'eau fraîche est introduite.
  5. Procédé de fonctionnement d'un appareil ménager selon la revendication 4, caractérisé en ce que la détection de la teneur en substances de lavage actives dans le liquide de nettoyage est réalisée de manière continue ou au moins à courts intervalles de temps.
  6. Procédé de fonctionnement d'un appareil ménager selon l'une quelconque des revendications 4 ou 5, caractérisé en ce que la détection de la teneur en substances de lavage actives dans le liquide de nettoyage est réalisée par l'intermédiaire de moyens électroniques.
  7. Procédé de séchage de produits à nettoyer dans des lave-vaisselle selon l'une quelconque des revendications 4 à 6, caractérisé en ce que l'opération de nettoyage est réglée en fonction de la teneur en substances de lavage actives détectée par le capteur dans le liquide de nettoyage.
  8. Procédé de séchage de produits à nettoyer dans des lave-vaisselle selon l'une quelconque des revendications 4 à 7, caractérisé en ce qu'au moins une partie de l'opération de nettoyage est répétée en fonction de la teneur en substances de lavage actives détectée par le capteur dans le liquide de nettoyage.
  9. Procédé de séchage de produits à nettoyer dans des lave-vaisselle selon l'une quelconque des revendications 4 à 8, caractérisé en ce qu'au moins une partie de l'opération de nettoyage est omise ou interrompue en fonction de la teneur en substances de lavage actives détectée par le capteur dans le liquide de nettoyage.
EP04791219A 2003-10-14 2004-10-13 Appareil electromenager pourvu d'un systeme d'introduction de produit de lavage dans le liquide de lavage Not-in-force EP1675996B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04791219T PL1675996T3 (pl) 2003-10-14 2004-10-13 Maszyna gospodarstwa domowego z systemem do doprowadzania środka czyszczącego do cieczy czyszczącej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347766A DE10347766A1 (de) 2003-10-14 2003-10-14 Haushaltsmaschine mit einem System zur Zufuhr von Reinigungsmittel in die Reinigungsflüssigkeit
PCT/EP2004/052530 WO2005038119A1 (fr) 2003-10-14 2004-10-13 Appareil electromenager pourvu d'un systeme d'introduction de produit de lavage dans le liquide de lavage

Publications (2)

Publication Number Publication Date
EP1675996A1 EP1675996A1 (fr) 2006-07-05
EP1675996B1 true EP1675996B1 (fr) 2010-12-22

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EP04791219A Not-in-force EP1675996B1 (fr) 2003-10-14 2004-10-13 Appareil electromenager pourvu d'un systeme d'introduction de produit de lavage dans le liquide de lavage

Country Status (8)

Country Link
US (1) US20070102024A1 (fr)
EP (1) EP1675996B1 (fr)
KR (1) KR20060128851A (fr)
AT (1) ATE492676T1 (fr)
DE (2) DE10347766A1 (fr)
ES (1) ES2356082T3 (fr)
PL (1) PL1675996T3 (fr)
WO (1) WO2005038119A1 (fr)

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Publication number Publication date
PL1675996T3 (pl) 2011-05-31
US20070102024A1 (en) 2007-05-10
WO2005038119A1 (fr) 2005-04-28
DE10347766A1 (de) 2005-06-09
ATE492676T1 (de) 2011-01-15
KR20060128851A (ko) 2006-12-14
ES2356082T3 (es) 2011-04-04
EP1675996A1 (fr) 2006-07-05
DE502004012032D1 (de) 2011-02-03

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