EP1864800A2 - Procédé destiné au calcul de paramètres de fonctionnement d'une presse - Google Patents

Procédé destiné au calcul de paramètres de fonctionnement d'une presse Download PDF

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Publication number: EP1864800A2
Authority: EP; European Patent Office
Prior art keywords: printing; printing machine; dryer; measuring; drying
Prior art date: 2006-06-09
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.): Granted

Application number

EP07108518A

Other languages

German (de)

English (en)

Other versions

EP1864800A3 (fr

EP1864800B1 (fr

EP1864800B2 (fr

Inventor

Jochen Jung

Rolf Müller

Michael Rohleder

Matthias Niedernhuber

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.)

Heidelberger Druckmaschinen AG

Original Assignee

Heidelberger Druckmaschinen AG

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.)

2006-06-09

Filing date

2007-05-21

Publication date

2007-12-12

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2007-05-21 Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG

2007-12-12 Publication of EP1864800A2 publication Critical patent/EP1864800A2/fr

2008-04-09 Publication of EP1864800A3 publication Critical patent/EP1864800A3/fr

2011-07-20 Publication of EP1864800B1 publication Critical patent/EP1864800B1/fr

2020-11-18 Application granted granted Critical

2020-11-18 Publication of EP1864800B2 publication Critical patent/EP1864800B2/fr

Status Active legal-status Critical Current

2027-05-21 Anticipated expiration legal-status Critical

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Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0403—Drying webs
- B41F23/0423—Drying webs by convection
- B41F23/0426—Drying webs by convection using heated air
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/30—Controlling, e.g. regulating, parameters of gas supply
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
- F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects

Definitions

the invention relates to a method for determining operating parameters of a printing press, in which the drying degree of the printing material determining quantities determined and used to optimize the drying process.
Each printer has his or her own understanding of the process of painting and drying, and with this understanding he sets the press and dryers. It also comes to basically wrong settings. Often the printer does not even know whether it works at or near the optimum of the individual settings. If waste is then produced, due to the complexity of the influencing parameters, it has little chance of understanding the erroneous processes.
the material flows influencing the drying process in the area of the drying device of the printing press are determined in order to optimize the drying process.
These streams are primarily the humidity of the supply air and the humidity of the exhaust air of the dryer and the moisture transported with the substrate and that primarily of the paint job. From these variables, the moisture balance and thus the degree of drying of the transported through the dryer substrate can be determined, the security of the process additionally gains, even if the material moisture of the substrate itself is determined before and after printing or painting and drying. Particularly advantageous and helpful for the operating staff of the printing press, it is when the essential characteristics of the determined material flows are visually displayed on a screen.
the printing machine suitable for carrying out the method therefore has sensors for measuring the substantial material flows influencing the drying process, as well as a computing unit in which the measured values are processed or further processed and / or the moisture balance of the material flows can be determined.
the supply and exhaust air of the dryer to measure, but the flow of actually on the incoming air and the exhaust air conveyed out Water, that is, the amount of water, the temperature and the flow rate of the supply and exhaust air is also suitably measured in order to determine in this way in conjunction with the relative humidity of the discharged amount of water vapor.
This amount of water vapor plus the part of the water that has been blown off into the material of the printing sheet, ie the paper corresponds approximately to the amount of water introduced via the coating when the printing material leaves the dryer with a well-dried coating layer.
FIG. 1 shows an offset printing machine 1 in a row construction with a feeder 2, in which the unprinted paper stack 3 is located, six printing units 8a to 8f for the four basic colors and optionally two further special colors, a first coating unit 9a, following two dryer units 10a and 10b, a second coating unit 9b and a boom 5 with the sheet delivery stack 6.
a printing press is offered, for example, under the name Speedmaster XL105-6-LYYLX3 by Heidelberger Druckmaschinen AG.
arrows directed inward or outward symbolize the locations in the printing press at which moisture is introduced or discharged into the printing process.
the arrow 4 symbolizes the moisture that is already in the stacked in the feeder 2 printing material sheets.
Moisture is understood here as meaning the moisture content of the paper, that is to say the amount of water which is bound in it per unit of mass of paper.
a moisture content of 8% in the feeder paper stack means that a paper sheet of 100 grams contains 8 grams of water. If the stack of paper is "equilibrated" with the ambient air in the pressroom after it has been conditioned, the equilibrium moisture content can be determined by the sorption isotherms of the paper with knowledge of the relative humidity and temperature of the air in the pressroom. However, such an acclimatization of the paper stack in the feeder has often not occurred.
the printing units 8 are printing units for wet offset, d. H. they have a dampening unit, over which the printing plate is moistened before coloring, with a part of this fountain solution passes through the blanket cylinder in the printing unit on the sheet to be printed. This moisture entry is symbolized by the arrow 18.
the arrow 13 represents the proportion of water that comes from the color printed on the sheet itself. This is naturally low in oil-based offset printing inks.
the arrow 12 takes into account that during the transport of the sheet by the machine a certain amount of evaporation takes place because the wetted with ink and fountain solution printing unit and the printed sheet are moister than the surrounding air in the press.
dryer units 10a and 10b and 11a to 11d Another very important moisture exchange takes place in the dryer units 10a and 10b and 11a to 11d.
These dryer units are supplied with ambient air (arrows 20 and 21) with the relative humidity of about 50% prevailing in the press room, which is then heated (in the case of hot air dryers) as it enters the dryer 10a, 10b, 11a to 11d, or with IR radiation dryers when entering the drying room.
ambient air arrows 20 and 21
the relative humidity of about 50% prevailing in the press room which is then heated (in the case of hot air dryers) as it enters the dryer 10a, 10b, 11a to 11d, or with IR radiation dryers when entering the drying room.
After the removal of a part of the paint application or the moisture of the paint in the paper material of the sheet to the exhaust air (arrows 30 and 31) then possible out of the paint layer contained amount of water in the form of vapor from the dryer units 10 and 11, so that the painted sheets on the stack do not lock.
the first lacquer layer Before the second lacquer layer is applied with the coating unit 9b, the first lacquer layer must be thoroughly dried with the aid of the drying devices 10a and 10b so that the lacquer layer added in the second coating unit 9b overlaps easily.
the second varnish may also be UV varnish, which should not react with a still moist water varnish. But even if it is also aqueous dispersion varnish in the second coating unit, the first coating layer must already be solidified, so that the second coating layer, z. B. for the production of very thick total coating layers, can be applied easily.
the paint application quantity can be adjusted in the printing press.
the knowledge of the essential operating parameters, in particular of the drying units 10a and 10b as well as of the machine speed can easily achieve an optimum result. For this, however, it is necessary to know the key parameters in the moisture balance.
a number of sensors are provided in the region of the printing press designated B1, with which these variables can be measured. This will be explained below with reference to FIG.
a humidity sensor 120a and a temperature sensor 120b are arranged in the vicinity of the air inlet ducts 121 for the driers 10a and 10b.
a humidity sensor and a temperature sensor can be sufficient.
corresponding humidity sensors 130c and temperature sensors 130d and pressure sensors 130a and flow sensors 130b are arranged in the exhaust duct of the dryer 10a and the dryer 10b.
the quantity per unit of time of the moisture flow discharged from the machine can be unambiguously determined as the difference between the air humidity flowing into the machine and the air flowing out of the machine.
the four sensors mentioned 130 a to d for the exhaust air when the exhaust ducts 131 of the two dryers 10 a and 10 b are summarized.
For measuring the relative humidity, the dew point or the absolute humidity it is possible, for example, to use capacitive sensors, aspiration psychrometers or sensors which measure the humidity via the absorption of infrared radiation in the water bands.
sensors which measure the relative humidity of air can be arranged in a cooled measuring air flow branched off from the exhaust air flow in order to increase the measuring accuracy. Because when the airflow is cooled, the relative humidity increases, so that the humidity readings move into a range where the measurement inaccuracy is lower, provided that the moisture in the measurement air flow does not condense.
a suitable measuring cell which prevents the latter is described with reference to FIG. 7 at the end of the illustration.
the amount of water introduced via the paint application is measured by flow sensors 119 in the supply and return of the paint supply device of the printing machine 1. Instead, the amount of paint or its water content in chamber doctor blade systems can also be determined from the difference between the delivery rates of the paint feed pump and the paint suction pump. Taking into account the type of varnish or its water content, which is usually 60% for dispersion varnishes, the amount of water introduced at this point is calculated in a simple manner. Another way to measure the amount of paint consumed is to detect the weight or the weight loss of the paint reservoir with a load cell.
a sensor 118 which determines the fountain solution input 18 from the dampening solution consumption in the six printing units 8a to f.
two temperature sensors 114 and 117 are provided which determine the temperature of the sheet entering the coating unit and that of the sheet leaving the dryer 110b. These temperature sensors are used to determine the inlet and outlet temperature of the arc. Based on the moisture balance, in addition to the temperature difference experienced by the material flow, an energy balance of the drying process can be drawn. For this purpose, for example, sensors can be used which measure the temperature of the sheet contactlessly via the infrared radiation emitted by the arc.
a mobile electronic measuring device such as a sword probe or a Aufsetzterler 103 are used, for example, operates on the principle of microwave absorption or conductivity of a hygroscopic electrolyte.
the signals of the sensors are processed in a computing unit 301 (FIG. 5), for example a commercially available measuring PC, to which the aforementioned sensors are connected via corresponding interface adapters.
a computing unit 301 for example a commercially available measuring PC, to which the aforementioned sensors are connected via corresponding interface adapters.
parameters relevant for the drying process and conversion factors are stored, such as the water content of the paint, the mathematical relationships for the conversion of relative humidity ⁇ in absolute humidity, as illustrated in the Mollier diagram of Figure 4, only a few call.
the computer keyboard is designated and with 304 the screen.
the bar 220 represents a measure of the amount of incoming water 20 into the dryer 10
the bar 230 the discharged via the exhaust air amount of water indicates. Both are proportional to the air flow F through the dryer, while the beam 230 can be increased within certain limits also by increasing the temperature T or the heating power of the hot air dryer or increasing the heat radiation of the IR dryer.
the next bar 219 describes the amount of water still contained in the lacquer layer applied after deduction of the amount of water introduced into the paper sheet. According to experience, this amounts to about 50 to 60% of the total amount of water applied to the sheet by means of varnishing.
an arc with a dry lacquer layer is obtained if the upper edge of the bar 219 does not exceed the upper edge of the bar 230 or not substantially.
the residual moisture of the lacquer layer of the sheet leaving the dryer 10b is shown in a further bar 200.
This residual moisture can be reduced on the one hand by reducing the paint application or by reducing the machine speed. This information is provided to assist the user in the form of corresponding symbols-L and -V with a downward arrow.
the residual moisture 200 can also be reduced by increasing the dryer temperature + T or increasing the air flow rate + F, which is again symbolized by corresponding symbols on the bar 230.
pop-up menus 306 serve to start up the bars with the mouse pointer 309 to display the exact measured values in the supply air or exhaust air duct of the dryer.
a good drying result for the sheet is obtained when the water application by the paint application in the coating unit 19a (100%) in about the sum of the dryer in the form of steam discharged water (50 to 60%) and in the paper below the Lacquer layer wegschered amount of water (40 to 50%) corresponds.
the Speedmaster XL105 press operated at the maximum printing speed of 18000 sheets per hour in sheet format 105 cm by 75 cm with a typical wet paint application of 3.5 ⁇ m corresponds to a water input F H20 of 29 1 / h, of which experience has shown Throw 50% off the paper leaving 50% in the paint.
This empirical value can be more accurately determined or verified when the paper moisture of the sheet is measured after leaving the dryer or in the stack. Therefore, the drying units 10a and 10b are suitably operated so that 50% of the symbolized via the arrow 19a water entry by means of the first coat of paint in the two dryers 10a and 10b largely discharged in the form of steam again.
the air in the press room has a relative humidity of 51% at an ambient temperature of 25 degrees Celsius. This corresponds to a load of 10 grams of water per kilogram of dry air (point A).
this supply air is heated to 80 degrees Celsius and then has a relative humidity of 3.4% (point B). However, this does not change the load of 10 grams of water per kilogram of dry air.
the illustration according to FIG. 5 clearly shows that the residual moisture of the sheet leaving the dryer 10b can be influenced not only by an increase in the heating power or by the amount of water or water vapor discharged via the exhaust air, but also by influencing a number of further variables.
the use of predried air or a reduction in the moisture content of the sheet entering the coating unit makes it possible to influence the drying result in a comprehensible manner.
FIG. An alternative possibility for visualizing the measurement results of the sensors is shown in FIG.
the part of the printing machine 1 containing the driers 10a and b and the coating unit 9a is shown and the measured values of the sensors are displayed in terms of value, with arrows directly indicating the connection between the measuring locations of the sensors and the displayed measured values for the relative humidity rF, temperature T. , Pressure p and paint quantity flow F L represent.
this representation it is possible to switch over from the display of the actual values to an indication of the deviation to self-set or, for example, from a previous order and then stored setpoints for temperature, humidity and paint quantity. If tolerance limits are exceeded, error messages can also be made visible on the screen.
a balance space B2 for the second coating unit 9b and the dryers 11a to d for the printing press 1 can be constructed and displayed.
graphical representation of the second balance space on the screen 304 ( Figure 5) can switch by appropriate inputs via the keyboard 303, the computer screen 301 and switch to the arranged in the supply air 21 and exhaust 31 and the paint flow 19b measuring sensors.
the computer 301 has a data line 307 which connects it to the machine control of the printing press.
the screen 304 interactively made changes in the heating power or the air flow rate of the dryer, the paint application amount and the machine speed can be transferred directly to the machine control and need not be made separately there.
the measuring cell has a pot-like or box-shaped housing 401, the bottom side with an air inlet nozzle 402 and offset from each other approximately centrally relative to the wall of the cup-shaped or box-shaped housing has an air outlet 403.
the air inlet port 402 has a much larger cross-section than the air outlet 403, to ensure that the pressure level does not change in the measuring cell, but approximately equal to the pressure of the main flow of the dryer exhaust, from which the measuring current is diverted.
a coarse grid 404 in the air inlet nozzle prevents the ingress of foreign bodies into the measuring cell.
a finer dust filter 405 divides the measuring cell between the air inlet nozzle and the air outlet nozzle. Because of its large diameter, which corresponds to that of the measuring cell, the dust filter 405 is not a significant flow resistance. It divides the volume of the measuring cell into an input area 415, in which the air still has the temperature and humidity of the main exhaust air flow, and into a measuring volume 416, in which the air is cooled as described below and measured in terms of temperature and relative humidity.
the lid of the measuring cell forms a ring 418, in which a Peltier element 410 is accommodated.
the Peltier element is provided on both sides with heat sinks, wherein the heat sink 414 keeps the "hot" side of the Peltier element to ambient temperature, which is supported by a fan 413.
Peltier element 410, heat sink 414 and fan 413 form a commercially available unit, as used for example for cooling electronic components is used. Such units are available at relatively low cost.
the intermediate ring 418 is made of heat-insulating material to prevent a thermal short circuit between the two sides of the Peltier element.
a grid 406 made of metal.
the grid 406 is relatively coarse mesh and allows the passage of air between the measurement volume 416 and the underlying sensor area.
the grid 406 is in thermal contact with the heat sink 407 and therefore assumes its temperature. Due to the very large surface area of the heat sink 407 and grid 406, the air passing from the measurement volume 416 through the grid 406 and reaching the sensor 408 assumes the temperature of the heat sink. This is maintained at about 35 ° C, in order to prevent condensation of the humidity of the air in the region of the sensor.
the sensor 408 is a low-cost, commercial sensor for measuring the relative humidity and temperature, as z. Sold by Sensirion Inc., Westlake Village, California, U.S.A. under the designation SHT75. Both values, the value of the relative humidity and the temperature measured value, serve to determine the absolute humidity in the exhaust air of the driers 10a / 10b, as described with reference to the other figures.
the temperature measuring element on the sensor 408 serves to regulate the temperature in the measuring cell with respect to the condensation of water vapor uncritical values between about 25 ° to 40 ° C by means of the Peltier element 410. Additional protection against condensation can be achieved by taking into account the relative humidity measurement signal.
the temperature in the measurement volume 416 can be raised by using the Peltier element 410 after reversing the current direction for heating.
the Peltier element 410 can be controlled and regulated with the aid of the humidity signal and the temperature signal of the sensor 408 such that the sensor always operates in a climate region that is not critical with respect to the condensation of vapor but optimal with respect to the measurement accuracy of the moisture measurement.
the invention has been described with reference to a moisture balance produced, since the use of dispersion coatings, the essential material flows include water.
the input and output of solvents eg. As the IPA (isopropanol) to balance and make this record for optimization by the printer visually available.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Drying Of Solid Materials (AREA)
Coating Apparatus (AREA)

EP07108518.7A 2006-06-09 2007-05-21 Procédé destiné au calcul de paramètres de fonctionnement d'une presse Active EP1864800B2 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE102006026957		2006-06-09
DE102006041721A DE102006041721A1 (de)	2006-06-09	2006-09-06	Verfahren zur Ermittlung von Betriebsparametern einer Druckmaschine

Publications (4)

Publication Number	Publication Date
EP1864800A2 true EP1864800A2 (fr)	2007-12-12
EP1864800A3 EP1864800A3 (fr)	2008-04-09
EP1864800B1 EP1864800B1 (fr)	2011-07-20
EP1864800B2 EP1864800B2 (fr)	2020-11-18

Family

ID=38421724

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP07108518.7A Active EP1864800B2 (fr)	2006-06-09	2007-05-21	Procédé destiné au calcul de paramètres de fonctionnement d'une presse

Country Status (6)

Country	Link
US (1)	US7954431B2 (fr)
EP (1)	EP1864800B2 (fr)
JP (1)	JP2007331393A (fr)
CN (1)	CN101085568B (fr)
AT (1)	ATE516957T1 (fr)
DE (1)	DE102006041721A1 (fr)

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WO2010026037A1 (fr) *	2008-09-05	2010-03-11	Manroland Ag	Procédé non destructif permettant de vérifier le degré de durcissement ou le degré de séchage de peintures et de laques
EP2404758A1 (fr) *	2010-07-09	2012-01-11	Heidelberger Druckmaschinen AG	Machine de traitement de feuilles, avec un ou plusieurs séchoirs
CN102673117A (zh) *	2011-03-18	2012-09-19	武汉虹之彩包装印刷有限公司	一种用于丝网印刷的加湿装置
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CN108446514B (zh) *	2018-04-03	2022-04-05	广州电力机车有限公司	自卸车进排气系统设计方法
DE102019206973A1 (de) *	2018-06-14	2019-12-19	Heidelberger Druckmaschinen Ag	Bogendruckmaschine mit einer Befeuchtungseinrichtung
WO2021040723A1 (fr)	2019-08-29	2021-03-04	Hewlett-Packard Development Company, L.P.	Appareil de régulation de pression pour imprimante tridimensionnelle
CN110834473B (zh) *	2019-11-29	2021-06-08	晋江市华联印铁制罐有限公司	一种印铁制罐自动生产控制方法
ES2949185T3 (es) *	2020-08-24	2023-09-26	SWISS KRONO Tec AG	Procedimiento para imprimir la superficie de una pieza de trabajo con una decoración y dispositivo para ello
DE102023128359A1 (de)	2022-11-14	2024-05-16	Heidelberger Druckmaschinen Aktiengesellschaft	Druckmaschinentrockner-Regelungsverfahren
DE102024203234A1 (de) *	2024-04-09	2025-10-09	Bhs Corrugated Maschinen- Und Anlagenbau Gmbh	Verfahren zum Trocknen einer bedruckten Papierbahn, Trockenstrecke

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- 2007-05-21 EP EP07108518.7A patent/EP1864800B2/fr active Active
- 2007-06-08 US US11/811,432 patent/US7954431B2/en active Active
- 2007-06-11 JP JP2007153844A patent/JP2007331393A/ja active Pending
- 2007-06-11 CN CN2007101099550A patent/CN101085568B/zh active Active

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EP1974918A3 (fr) *	2007-03-28	2009-12-02	manroland AG	Procédé de détermination du degré de durcissement ou de séchage de couches de couleurs d'impression ou de laque dans des presses
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EP2404758B1 (fr)	2010-07-09	2016-03-02	Heidelberger Druckmaschinen AG	Machine de traitement de feuilles, avec un ou plusieurs séchoirs
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Also Published As

Publication number	Publication date
ATE516957T1 (de)	2011-08-15
JP2007331393A (ja)	2007-12-27
CN101085568B (zh)	2010-12-01
CN101085568A (zh)	2007-12-12
EP1864800A3 (fr)	2008-04-09
EP1864800B1 (fr)	2011-07-20
US20070283827A1 (en)	2007-12-13
EP1864800B2 (fr)	2020-11-18
DE102006041721A1 (de)	2007-12-13
US7954431B2 (en)	2011-06-07

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