EP1060888B1 - Cleaning device for the graphic industry - Google Patents

Cleaning device for the graphic industry Download PDF

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Publication number
EP1060888B1
EP1060888B1 EP00107021A EP00107021A EP1060888B1 EP 1060888 B1 EP1060888 B1 EP 1060888B1 EP 00107021 A EP00107021 A EP 00107021A EP 00107021 A EP00107021 A EP 00107021A EP 1060888 B1 EP1060888 B1 EP 1060888B1
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EP
European Patent Office
Prior art keywords
pressure
pressure chamber
compressed air
valve
cleaning device
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.)
Expired - Lifetime
Application number
EP00107021A
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German (de)
French (fr)
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EP1060888A1 (en
Inventor
Manfred Langenmayr
Bernhard Grinzinger
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.)
Baldwin Germany GmbH
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Baldwin Germany GmbH
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Filing date
Publication date
Application filed by Baldwin Germany GmbH filed Critical Baldwin Germany GmbH
Publication of EP1060888A1 publication Critical patent/EP1060888A1/en
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Publication of EP1060888B1 publication Critical patent/EP1060888B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the invention relates to a cleaning device for cleaning a running Dirt surface in a machine of the graphic industry according to the Preamble of claim 1.
  • a cleaning device of this type is known from US 4,344,361 (DE 30 05 469 C2) known.
  • Dirt surfaces in machines in the graphics industry, especially in Printing presses are the different cylinders such as Blanket cylinder, plate cylinder and impression cylinder, but also too printing paper webs and sheets.
  • the dirt from paper webs and paper sheets in particular consists of paper dust, which is to achieve good print quality should be removed before printing.
  • the cleaning cloth can be a pre-moistened cloth or according to the intermittent feed of the cleaning cloth intermittently be moistened in the cloth section which is between the Pressure element and the dirt surface to be cleaned is introduced.
  • the cleaning cloth section dry cleaning cloth section through the pressure element to the press the washed cylinder surface. It can be seen that during of the washing operation the washcloth several times through the pressure element pressed the dirt surface to be cleaned and lifted off again must become.
  • the invention is intended to solve the problem for the Shorten cleaning time required.
  • the invention can also be used for cleaning devices which in a machine of the graphic industry, in particular in a Printing machine, automatically controlled alternately one of two or of several cylinders can be assigned to them one after the other clean.
  • Pressure relief valve and / or the outlet pressure of the pressure regulator automatically adapt to changing operating conditions.
  • the dirt surface can be a paper web, a paper sheet or a Be cylinders of a printing press, in particular a blanket cylinder, Plate cylinder or impression cylinder.
  • FIG. 1 and 2 show a cylinder 2 with a surface 4 to be cleaned, which the latter is referred to below as a dirt surface.
  • the cylindrical dirt surface 4 of the cylinder 2 to be cleaned lies with Small distance axially parallel to a wash bar 5, which axially parallel to the cylinder 2 a carrier 7 and one carried by this Has rubber lip 6. They form a pneumatic one between them Pressure chamber 8 for inflation and thus for turning on the rubber lip 8 the dirt surface 4.
  • a cloth section 18 extends over the rubber lip 6 Cleaning cloth 10, which is then intermittently by one predetermined distance from a clean cloth roll 12 to a dirty cloth roll 14 is transportable if the cleaning cloth according to FIG. 1 of the Dirt surface 4 is parked (removed).
  • the cleaning cloth 10 can be pre-moistened and / or by a Humidifier 16 to be moistened before it enters the gap is transported between the rubber lip 6 and the dirt surface 4.
  • a pneumatic pressure line 20 is connected to the pressure chamber 8, which by means of a valve arrangement 22, 24 alternately with a Compressed air source 26 or can be connected to a pressure relief outlet 28 and which on the side connected to the pressure chamber 8 of the Valve arrangement 22, 24 with a pressure switch 31 according to FIG. 1 or a Pressure relief valve according to FIG. 2 is provided.
  • the pressure switch 31 or the pressure relief valve 30 is on to be turned on and pressing the cleaning cloth 10 against the dirty surface 4 Pressure set.
  • the pressure of the compressed air source 26 is through a pressure regulator 32 to a much higher pressure than the switching pressure of the Pressure relief valve 30 or the pressure switch 31 set.
  • the valve arrangement 22, 24 can have a single valve with corresponding Switching options or according to FIGS. 1 and 2 from two valves 22 and 24 exist.
  • One valve 22, which is the compressed air supply valve represents, is in the pressure line 20 between the pressure regulator 32 and the Pressure chamber 8 arranged.
  • the other valve 24, which is a Vent valve for venting to the atmosphere can be directly connected to the Pressure chamber 8 or between this and the compressed air supply valve 22 to the Pressure line 20 may be connected.
  • the pressure switch 31 or the pressure relief valve 30 can be connected to the pressure chamber 8 or between the latter and the compressed air supply valve 22 to the pressure line 20 be connected.
  • the outlet pressure of the pressure regulator 32 can be, for example, 2 bar be set.
  • the pressure to open the pressure relief valve 30 or Switching the pressure switch 31 can, for example, be set to 0.6 bar his.
  • An electrical control device 34 which is preferably a processor and contains programs, controls the two valves 22 and 24 of the Valve arrangement depending on predetermined machine conditions.
  • washing mode can be started during which the printing mode is set is, however, the cylinder 2 continues to rotate and paper to be printed continues is transported through the machine.
  • the Rubber lip 6 placed several times on the dirt surface 4 of the cylinder 2 and turned off again, with the cleaning cloth standing still intermittently, when it is pressed against the rotating dirt surface 4.
  • the cleaning cloth 10 is only advanced by a predetermined cloth section 18 transported when it is not rotating according to FIGS. 1 and 2 Dirt surface 4 is present.
  • the cleaning cloth 10th each from the moistening device 16 with water or another If liquid has been moistened, a drying process can be carried out in which a dry cleaning cloth section 18 to the cleaned dirt surface 4 is created.
  • the invention also makes it possible to alternately connect the washing bar 5 to the cylindrical surface of two or more cylinders 2 to make them to be cleaned one after the other. If there are different distances between the Rubber lip 6 and the dirt surfaces 4 to be cleaned are provided, the greater or smaller distance of the rubber lip 6 from the cleaning dirt surface 4 by adjusting the pressure on Pressure regulator 32 are bridged, and / or by appropriate setting of the pressure switch 31 or the pressure relief valve 30, in which he switch should be used for venting. This depends on the machine conditions optionally changing the pressures at the outlet of the pressure regulator 32 and / or of the venting switching pressure on the pressure switch 31 or on the pressure relief valve 30 can be done by the control device 34.
  • a wash bar 5 with a rubber lip 6 is from the prior art is known, for example from said US 4,344,361. Furthermore, from Prior art also known wash bars, which instead of a inflatable rubber lip have multiple pneumatically adjustable cylinders, which press against a flexible element which is similar to the rubber lip 6 is arranged to press a cleaning cloth against a dirty surface. Instead of a rubber lip 6, one can also be perfect in the circumferential direction closed hose can be used. The invention is also for such Embodiments can be used.
  • the invention is not only for cleaning cylindrical surfaces usable by cylinders, but also for cleaning moving ones Sheets of paper and sheets of paper, in particular paper dust from them wipe.
  • the direction of movement 36 of the cleaning cloth 14 shown in FIGS. 1 and 2 and the direction of movement 38 of the dirt surface 4 are only an example understand.
  • the directions of movement can also be reversed or in go in the same direction. It is only essential that between the Cleaning cloth 10 and the dirt surface 4 to be cleaned Relative movement takes place.
  • Another manometer 40 shows the one set on the pressure regulator 32 Outlet pressure.
  • a manometer 42 shows the pneumatic pressure in the Pressure room 8.
  • a pre-moistened cleaning cloth 14 can be used, which is already damp on the cloth roll 12.
  • Compressed air source 26 is typically a compressed air network in a print shop, which have an air pressure of e.g. B. has 6 bar.
  • the compressed air supply path 20 from the Compressed air source 26 to pressure chamber 8 of pressure element 6 contains in Compressed air supply direction successively the pressure regulator 32 to reduce the Network pressure of z. B. 6 bar on z. B. 2 bar or 1.5 bar, which in Fig. 1 in Ventilation valve 22 (compressed air supply valve) shown in the closed position Quick exhaust valve 44 and the pressure switch 31.
  • the quick exhaust valve has a compressed air inlet "P", one Compressed air outlet "A”, and a vent outlet "R” with a Silencer 45.
  • the compressed air supplied from the pressure source 26 flows from the ventilation valve 22 through the compressed air inlet “P” to the compressed air outlet "A” of the Quick exhaust valve 44.
  • the exhaust outlet “R” is thereby locked.
  • the pressure of the compressed air at the compressed air inlet "P” by switching the vent valve 24 from one Closed position in the open position shown in Fig. 1 under one predetermined value drops, then the compressed air outlet automatically "A” vented via the vent outlet "R” and the silencer 45. This results in a faster ventilation of the pressure chamber 8 than when the venting of the pressure chamber 8 only takes place via the vent valve 24 would.
  • the ventilation valve 22 has one at the outlet of the pressure regulator 32 connected compressed air inlet 48 and one to the compressed air inlet "P" of the quick exhaust valve 44 connected compressed air outlet 50.
  • the Vent inlet 46 of the vent valve 24 is at the section 20-3 of the Compressed air supply path 20 connected to the output 50 of the Ventilation valve 22 with the compressed air inlet "P" of the Quick exhaust valve 44 connects.
  • the pressure relief outlet 28 of the Vent valve 24 can also be provided with a muffler 45.
  • the ventilation valve 22 is in each case from the control device 34 Open position and switched from the pressure switch 31 to the closed position.
  • the Control line 49 of the pressure switch 30 is preferably not directly to the Ventilation valve 22 connected, but via the control device 34.
  • the vent valve 24 is both from the control device 34 in the Open position as well as switched to the closed position.
  • the switching process is from the Control device 34 triggered or by the pressure switch 31.
  • the pressure switch 31 (preferably a Vacuum switch), the quick exhaust valve 44, the ventilation valve 22 and the vent valve 24 is arranged as close as possible to the pressure chamber 8, so that there are short flow paths.
  • the pressure switch 31 is preferably connected directly to the pressure chamber 8 or very close to its inlet 56 for the compressed air supply path 20.
  • Pressure chamber 8 can additionally be provided with a pressure relief valve 54 be set to a higher pressure to open than that Target pressure in the pressure chamber 8.
  • the pressure switch 31 of FIG. 1 represents a pressure limitation measure, which according to the embodiment of FIG. 2 also by instead the pressure chamber 8 or close to this, for. B. at its compressed air inlet 56, pressure relief valve 30 connected to the compressed air supply path 20 according to FIG. 2 can be realized, which opens when the air pressure in the pressure chamber 8 rises above the setpoint with which the compressed air increases the pressure element 6 should press the dirt surface. Instead, this could also be done in FIG. 1 shown relief valve 54 can be used.
  • the invention has the advantage that on the one hand not the mostly fluctuating network pressure Compressed air source 26 is used, which leads to inaccurate controls of the Pressure element 6 would lead, and on the other hand by the pressure regulator 32nd a regulated pressure is available that is higher than the set pressure in the Pressure chamber 8 so that the required air pressure quickly from the pressure regulator 32 reaches the pressure chamber 8, but without a higher one in the pressure chamber 8 Pressure is generated as the setpoint.

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  • Cleaning In General (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft eine Reinigungsvorrichtung zum Reinigen einer laufenden Schmutzfläche in einer Maschine der graphischen Industrie gemäß dem Oberbegriff von Anspruch 1.The invention relates to a cleaning device for cleaning a running Dirt surface in a machine of the graphic industry according to the Preamble of claim 1.

Eine Reinigungsvorrichtung dieser Art ist aus der US 4 344 361 (DE 30 05 469 C2) bekannt.A cleaning device of this type is known from US 4,344,361 (DE 30 05 469 C2) known.

Schmutzflächen in Maschinen der graphischen Industrie, insbesondere in Druckmaschinen, sind die verschiedenen Zylinder wie beispielsweise Gummituchzylinder, Plattenzylinder und Gegendruckzylinder, jedoch auch zu bedruckende Papierbahnen und Papierbögen. Der Schmutz von Papierbahnen und Papierbögen besteht insbesondere aus Papierstaub, welcher zur Erzielung einer guten Druckqualität vor dem Bedrucken entfernt werden sollte.Dirt surfaces in machines in the graphics industry, especially in Printing presses are the different cylinders such as Blanket cylinder, plate cylinder and impression cylinder, but also too printing paper webs and sheets. The dirt from paper webs and paper sheets in particular consists of paper dust, which is to achieve good print quality should be removed before printing.

Während der Reinigung von Zylindern, insbesondere beim Reinigen von Gummituchzylindem und Plattenzylindern, wird auch das Druckbild von der Mantelfläche dieser Zylinder abgewischt. Dadurch kann während des Reinigungsvorganges die Papierbahn nicht bedruckt werden, sie läuft jedoch weiterhin durch die Maschine, weil die Maschine nicht abgestellt wird. Die während des Reinigungsbetriebes durch die Maschine laufenden Papierabschnitte sind Abfall (Makulatur). Während des Reinigungsbetriebes muß das Reinigungstuch, normalerweise ein feuchtes Waschtuch, mehrmals an die zu reinigende Schmutzfläche angelegt und wieder abgehoben werden, damit im abgehobenen Zustand das Reinigungstuch weiter transportiert und sein verschmutzter Tuchabschnitt durch einen sauberen Tuchabschnitt im Bereich zwischen dem Andrückelement und der zu reinigenden Schmutzfläche ersetzt werden kann. Das Reinigungstuch kann ein vorgefeuchtetes Tuch sein oder dem intermittierenden Vorschub des Reinigungstuches entsprechend intermittierend in dem Tuchabschnitt befeuchtet werden, welcher zwischen das Andrückelement und die zu reinigende Schmutzfläche eingeführt wird. Zum schnellen Trocknen einer mit einem feuchten oder nassen Waschtuch gereinigten Zylinderfläche ist es auch bekannt, nach dem Waschvorgang einen trockenen Reinigungstuchabschnitt durch das Andrückelement an die gewaschene Zylinderfläche anzudrücken. Daraus ist ersichtlich, daß während des Waschbetriebes das Waschtuch durch das Andrückelement mehrmals an die zu reinigende Schmutzfläche angedrückt und davon wieder abgehoben werden muß.While cleaning cylinders, especially when cleaning cylinders Blanket cylinders and plate cylinders, the print image of the The outer surface of these cylinders is wiped off. This allows during the Cleaning process the paper web are not printed, but it runs continues through the machine because the machine is not switched off. The running through the machine during cleaning operation Pieces of paper are waste. During the cleaning operation the cleaning cloth, usually a damp washcloth, has to be turned on several times the dirt surface to be cleaned is created and lifted off again, so that the cleaning cloth is transported further in the raised state and his dirty cloth section by a clean cloth section in the Area between the pressure element and the dirt surface to be cleaned can be replaced. The cleaning cloth can be a pre-moistened cloth or according to the intermittent feed of the cleaning cloth intermittently be moistened in the cloth section which is between the Pressure element and the dirt surface to be cleaned is introduced. To the Quickly dry one with a damp or wet washcloth cleaned cylinder surface, it is also known after the washing process dry cleaning cloth section through the pressure element to the press the washed cylinder surface. It can be seen that during of the washing operation the washcloth several times through the pressure element pressed the dirt surface to be cleaned and lifted off again must become.

Durch die Erfindung soll die Aufgabe gelöst werden, die für den Reinigungsbetrieb erforderliche Zeit zu verkürzen. The invention is intended to solve the problem for the Shorten cleaning time required.

Diese Aufgabe wird gemäß der Erfindung durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the characterizing Features of claim 1 solved.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Erfindung kann auch für Reinigungsvorrichtungen verwendet werden, welche in einer Maschine der graphischen Industrie, insbesondere in einer Druckmaschine, automatisch gesteuert wechselweise je einem von zwei oder von mehreren Zylindern zugeordnet werden, um diese nacheinander zu reinigen. Für diesen Fall besteht gemäß der Erfindung die Möglichkeit, das Überdruckventil und/oder den Ausgangsdruck des Druckreglers automatisch den wechselnden Betriebsbedingungen anzupassen.The invention can also be used for cleaning devices which in a machine of the graphic industry, in particular in a Printing machine, automatically controlled alternately one of two or of several cylinders can be assigned to them one after the other clean. In this case there is the possibility according to the invention that Pressure relief valve and / or the outlet pressure of the pressure regulator automatically adapt to changing operating conditions.

Die Erfindung wird im folgenden mit Bezug auf die Zeichnung anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In der Zeichnung zeigt

Fig. 1
schematisch eine Reinigungsvorrichtung nach der Erfindung zum Reinigen einer laufenden Schmutzfläche in einer Maschine der graphischen Industrie,
Fig. 2
schematisch eine weitere Ausführungsform einer Reinigungsvorrichtung nach der Erfindung.
The invention is described below with reference to the drawing using a preferred embodiment as an example. In the drawing shows
Fig. 1
schematically a cleaning device according to the invention for cleaning a running dirt surface in a machine of the graphics industry,
Fig. 2
schematically shows a further embodiment of a cleaning device according to the invention.

Fig. 1 und 2 zeigen eine Reinigungsvorrichtung nach der Erfindung zum Reinigen einer laufenden Schmutzfläche in einer Maschine der graphischen Industrie. Die Schmutzfläche kann eine Papierbahn, ein Papierbogen oder ein Zylinder einer Druckmaschine sein, insbesondere ein Gummituchzylinder, Druckplattenzylinder oder Gegendruckzylinder.1 and 2 show a cleaning device according to the invention for Cleaning a running dirt surface in a graphic machine Industry. The dirt surface can be a paper web, a paper sheet or a Be cylinders of a printing press, in particular a blanket cylinder, Plate cylinder or impression cylinder.

Fig. 1 und 2 zeigen einen Zylinder 2 mit einer zu reinigenden Fläche 4, welch letztere im folgenden als Schmutzfläche bezeichnet wird. 1 and 2 show a cylinder 2 with a surface 4 to be cleaned, which the latter is referred to below as a dirt surface.

Der zu reinigenden zylindrischen Schmutzfläche 4 des Zylinders 2 liegt mit kleinem Abstand achsparallel ein Waschbalken 5 gegenüber, welcher achsparallel zum Zylinder 2 einen Träger 7 und eine von diesem getragene Gummilippe 6 aufweist. Sie bilden zwischen sich eine pneumatische Druckkammer 8 zum Aufblasen und damit zum Anstellen der Gummilippe 8 an die Schmutzfläche 4.The cylindrical dirt surface 4 of the cylinder 2 to be cleaned lies with Small distance axially parallel to a wash bar 5, which axially parallel to the cylinder 2 a carrier 7 and one carried by this Has rubber lip 6. They form a pneumatic one between them Pressure chamber 8 for inflation and thus for turning on the rubber lip 8 the dirt surface 4.

Über die Gummilippe 6 erstreckt sich ein Tuchabschnitt 18 eines Reinigungstuches 10, welches intermittierend jeweils dann um eine vorbestimmte Strecke von einer Saubertuchrolle 12 auf eine Schmutztuchrolle 14 transportierbar ist, wenn das Reinigungstuch entsprechend Fig. 1 von der Schmutzfläche 4 abgestellt (entfernt) ist.A cloth section 18 extends over the rubber lip 6 Cleaning cloth 10, which is then intermittently by one predetermined distance from a clean cloth roll 12 to a dirty cloth roll 14 is transportable if the cleaning cloth according to FIG. 1 of the Dirt surface 4 is parked (removed).

Das Reinigungstuch 10 kann vorgefeuchtet und/oder durch eine Befeuchtungsvorrichtung 16 befeuchtet werden, bevor es in den Zwischenraum zwischen der Gummilippe 6 und der Schmutzfläche 4 transportiert wird.The cleaning cloth 10 can be pre-moistened and / or by a Humidifier 16 to be moistened before it enters the gap is transported between the rubber lip 6 and the dirt surface 4.

Durch Beaufschlagen des Druckraumes 8 mit Druckluft bewegt die Gummilippe 6 den Waschtuchabschitt 18 des Reinigungstuches 10 zu der Schmutzfläche 4 und drückt ihn an diese Schmutzfläche 4. Durch Entlüften der Druckluft aus dem Druckraum 8 wird der Reinigungstuchabschnitt 18 wieder von der Schmutzfläche 4 abgehoben durch die sich jetzt elastisch zusammenziehende Gummilippe 6 und durch die Spannung des Reinigungstuches 10.By applying compressed air to the pressure chamber 8, the rubber lip moves 6 the wash cloth section 18 of the cleaning cloth 10 to the dirty surface 4 and presses it against this dirt surface 4. By venting the compressed air the pressure chamber 8, the cleaning cloth section 18 is again from the Dirt surface 4 is lifted by the now contracting elastically Rubber lip 6 and the tension of the cleaning cloth 10th

An den Druckraum 8 ist eine pneumatische Druckleitung 20 angeschlossen, welche durch eine Ventilanordnung 22, 24 wechselweise mit einer Druckluftquelle 26 oder mit einem Druckentlastungsauslaß 28 verbindbar ist und welche auf der mit dem Druckraum 8 verbundenen Seite der Ventilanordnung 22, 24 mit einem Druckschalter 31 gemäß Fig. 1 oder einem Überdruckventil gemäß Fig. 2 versehen ist.A pneumatic pressure line 20 is connected to the pressure chamber 8, which by means of a valve arrangement 22, 24 alternately with a Compressed air source 26 or can be connected to a pressure relief outlet 28 and which on the side connected to the pressure chamber 8 of the Valve arrangement 22, 24 with a pressure switch 31 according to FIG. 1 or a Pressure relief valve according to FIG. 2 is provided.

Der Druckschalter 31 bzw. das Überdruckventil 30 ist auf einen zum Anstellen und Andrücken des Reinigungstuches 10 an die Schmutzfläche 4 geeigneten Druck eingestellt. Der Druck der Druckluftquelle 26 ist durch einen Druckregler 32 auf einen wesentlich höheren Druck als der Schaltdruck des Überdruckventils 30 bzw. des Druckschalters 31 eingestellt.The pressure switch 31 or the pressure relief valve 30 is on to be turned on and pressing the cleaning cloth 10 against the dirty surface 4 Pressure set. The pressure of the compressed air source 26 is through a pressure regulator 32 to a much higher pressure than the switching pressure of the Pressure relief valve 30 or the pressure switch 31 set.

Dadurch wird der Druckraum 8 mit dem höheren Druck der Druckluftquelle 26 schnell gefüllt und das Andrückelement bzw. die Gummilippe 6 schnell an die Schmutzfläche 4 angestellt, wobei jedoch der Druck im Druckraum 8 durch den am Druckschalter 31 bzw. Überdruckventil 30 eingestellten Druck begrenzt wird.As a result, the pressure chamber 8 with the higher pressure of the compressed air source 26 quickly filled and the pressure element or the rubber lip 6 quickly to the Dirt surface 4 turned on, but the pressure in the pressure chamber 8 by the pressure set at the pressure switch 31 or pressure relief valve 30 is limited becomes.

Die Ventilanordnung 22, 24 kann ein einziges Ventil mit entsprechenden Umschaltmöglichkeiten sein oder entsprechend Fig. 1 und 2 aus zwei Ventilen 22 und 24 bestehen. Das eine Ventil 22, welches das Druckluftzufuhrventil darstellt, ist in der Druckleitung 20 zwischen dem Druckregler 32 und der Druckkammer 8 angeordnet. Das andere Ventil 24, welches ein Entlüftungsventil zur Entlüftung in die Atmosphäre ist, kann direkt an den Druckraum 8 oder zwischen diesem und dem Druckluftzufuhrventil 22 an die Druckleitung 20 angeschlossen sein.The valve arrangement 22, 24 can have a single valve with corresponding Switching options or according to FIGS. 1 and 2 from two valves 22 and 24 exist. One valve 22, which is the compressed air supply valve represents, is in the pressure line 20 between the pressure regulator 32 and the Pressure chamber 8 arranged. The other valve 24, which is a Vent valve for venting to the atmosphere can be directly connected to the Pressure chamber 8 or between this and the compressed air supply valve 22 to the Pressure line 20 may be connected.

Der Druckschalter 31 bzw. das Überdruckventil 30 kann an den Druckraum 8 oder zwischen diesem und dem Druckluftzufuhrventil 22 an die Druckleitung 20 angeschlossen sein.The pressure switch 31 or the pressure relief valve 30 can be connected to the pressure chamber 8 or between the latter and the compressed air supply valve 22 to the pressure line 20 be connected.

Der Ausgangsdruck des Druckreglers 32 kann beispielsweise auf 2 bar eingestellt sein. Der Druck zum Öffnen des Überdruckventils 30 bzw. zum Schalten des Druckschalters 31 kann beispielsweise auf 0,6 bar eingestellt sein.The outlet pressure of the pressure regulator 32 can be, for example, 2 bar be set. The pressure to open the pressure relief valve 30 or Switching the pressure switch 31 can, for example, be set to 0.6 bar his.

Eine elektrische Steuereinrichtung 34, welche vorzugsweise einen Prozessor und Programme enthält, steuert die beiden Ventile 22 und 24 der Ventilanordnung in Abhängigkeit von vorbestimmten Maschinenbedingungen. An electrical control device 34, which is preferably a processor and contains programs, controls the two valves 22 and 24 of the Valve arrangement depending on predetermined machine conditions.

Beispielsweise kann immer nach vorbestimmten Druckbetriebs-Zeiten ein Waschbetrieb gestartet werden, während welchem der Druckbetrieb eingestellt ist, jedoch der Zylinder 2 weiterhin rotiert und zu bedruckendes Papier weiterhin durch die Maschine transportiert wird. Während des Waschbetriebes wird die Gummilippe 6 mehrmals an die Schmutzfläche 4 des Zylinders 2 angestellt und wieder abgestellt, wobei das Reinigungstuch intermittierend jeweils stillsteht, wenn es an die rotierende Schmutzfläche 4 angedrückt ist. Das Reinigungstuch 10 wird jeweils nur um einen vorbestimmten Tuchabschnitt 18 weiter transportiert, wenn es entsprechend Fig. 1 und 2 nicht an der rotierenden Schmutzfläche 4 anliegt. Nach mehrmaligem Anlegen jeweils eines anderen Tuchabschnittes 18 an die Schmutzfläche 4, wobei das Reinigungstuch 10 jeweils von der Befeuchtungsvorrichtung 16 mit Wasser oder einer anderen Flüssigkeit befeuchtet wurde, kann ein Trocknungsvorgang durchgeführt werden, bei welchem ein trockener Reinigungstuchabschnitt 18 an die gereinigte Schmutzfläche 4 angelegt wird.For example, always after predetermined printing operation times Washing mode can be started during which the printing mode is set is, however, the cylinder 2 continues to rotate and paper to be printed continues is transported through the machine. During the washing operation, the Rubber lip 6 placed several times on the dirt surface 4 of the cylinder 2 and turned off again, with the cleaning cloth standing still intermittently, when it is pressed against the rotating dirt surface 4. The cleaning cloth 10 is only advanced by a predetermined cloth section 18 transported when it is not rotating according to FIGS. 1 and 2 Dirt surface 4 is present. After creating another one several times Cloth section 18 to the dirt surface 4, the cleaning cloth 10th each from the moistening device 16 with water or another If liquid has been moistened, a drying process can be carried out in which a dry cleaning cloth section 18 to the cleaned dirt surface 4 is created.

Die Erfindung ermöglicht es auch, den Waschbalken 5 wechselweise an die zylindrische Oberfläche von zwei oder mehr Zylindern 2 anzustellen, um diese nacheinander zu reinigen. Wenn dabei unterschiedliche Abstände zwischen der Gummilippe 6 und den zu reinigenden Schmutzflächen 4 vorgesehen sind, kann der größere oder kleinere Abstand der Gummilippe 6 von der zu reinigenden Schmutzfläche 4 durch entsprechende Einstellung des Druckes am Druckregler 32 überbrückt werden, und/oder durch entsprechende Einstellung des Druckschalters 31 bzw. des Überdruckventils 30, bei welchem er schalten soll zum Entlüften. Diese von den Maschinenbedingungen abhängige wahlweise Veränderung der Drücke am Ausgang des Druckreglers 32 und/oder des Entlüftungs-Schaltdruckes am Druckschalter 31 bzw. am Überdruckventil 30 kann durch die Steuereinrichtung 34 erfolgen.The invention also makes it possible to alternately connect the washing bar 5 to the cylindrical surface of two or more cylinders 2 to make them to be cleaned one after the other. If there are different distances between the Rubber lip 6 and the dirt surfaces 4 to be cleaned are provided, the greater or smaller distance of the rubber lip 6 from the cleaning dirt surface 4 by adjusting the pressure on Pressure regulator 32 are bridged, and / or by appropriate setting of the pressure switch 31 or the pressure relief valve 30, in which he switch should be used for venting. This depends on the machine conditions optionally changing the pressures at the outlet of the pressure regulator 32 and / or of the venting switching pressure on the pressure switch 31 or on the pressure relief valve 30 can be done by the control device 34.

Ein Waschbalken 5 mit einer Gummilippe 6 ist aus dem Stand der Technik bekannt, beispielsweise aus der genannten US 4 344 361. Ferner sind aus dem Stand der Technik auch Waschbalken bekannt, welche anstelle einer aufblasbaren Gummilippe mehrere pneumatisch verstellbare Zylinder haben, welche gegen ein flexibles Element drücken, welches ähnlich der Gummilippe 6 zum Andrücken eines Reinigungstuches an eine Schmutzfläche angeordnet ist. Anstelle einer Gummilippe 6 kann auch ein in Umfangsrichtung vollkommen geschlossener Schlauch verwendet werden. Die Erfindung ist auch für solche Ausführungsformen verwendbar.A wash bar 5 with a rubber lip 6 is from the prior art is known, for example from said US 4,344,361. Furthermore, from Prior art also known wash bars, which instead of a inflatable rubber lip have multiple pneumatically adjustable cylinders, which press against a flexible element which is similar to the rubber lip 6 is arranged to press a cleaning cloth against a dirty surface. Instead of a rubber lip 6, one can also be perfect in the circumferential direction closed hose can be used. The invention is also for such Embodiments can be used.

Ferner ist die Erfindung nicht nur zum Reinigen von zylindrischen Oberflächen von Zylindern verwendbar, sondern auch zum Reinigen von bewegten Papierbahnen und Papierbögen, insbesondere um von ihnen Papierstaub abzuwischen.Furthermore, the invention is not only for cleaning cylindrical surfaces usable by cylinders, but also for cleaning moving ones Sheets of paper and sheets of paper, in particular paper dust from them wipe.

Die in Fig. 1 und 2 gezeigte Bewegungsrichtung 36 des Reinigungstuches 14 und die Bewegungsrichtung 38 der Schmutzfläche 4 sind nur als Beispiel zu verstehen. Die Bewegungsrichtungen können auch umgekehrt sein oder in gleicher Richtung gehen. Wesentlich ist lediglich, daß zwischen dem Reinigungstuch 10 und der zu reinigenden Schmutzfläche 4 eine Relativbewegung stattfindet.The direction of movement 36 of the cleaning cloth 14 shown in FIGS. 1 and 2 and the direction of movement 38 of the dirt surface 4 are only an example understand. The directions of movement can also be reversed or in go in the same direction. It is only essential that between the Cleaning cloth 10 and the dirt surface 4 to be cleaned Relative movement takes place.

Ein anderes Manometer 40 zeigt den am Druckregler 32 eingestellten Ausgangsdruck an. Ein Manometer 42 zeigt den Pneumatikdruck in dem Druckraum 8 an.Another manometer 40 shows the one set on the pressure regulator 32 Outlet pressure. A manometer 42 shows the pneumatic pressure in the Pressure room 8.

Anstelle eines trockenen oder bedarfsweise befeuchteten Reinigungstuches 14 kann ein vorbefeuchtetes Reinigungstuch 14 verwendet werden, welches bereits auf der Saubertuchrolle 12 feucht ist.Instead of a dry or, if necessary, moistened cleaning cloth 14 a pre-moistened cleaning cloth 14 can be used, which is already damp on the cloth roll 12.

Im folgenden werden Details von Fig. 1 beschrieben.Details of Fig. 1 will now be described.

Die Druckluftquelle 26 ist normalerweise ein Druckluftnetz in einer Druckerei, welche einen Luftdruck von z. B. 6 bar hat. Der Druckluftzufuhrweg 20 von der Druckluftquelle 26 zum Druckraum 8 des Andrückelements 6 enthält in Druckluftzufuhrrichtung nacheinander den Druckregler 32 zur Reduzierung des Netzdruckes von z. B. 6 bar auf z. B. 2 bar oder 1,5 bar, das in Fig. 1 in Schließstellung gezeigte Belüftungs-Ventil 22 (Druckluftzufuhr-Ventil), ein Schnellentlüftungsventil 44 und den Druckschalter 31.Compressed air source 26 is typically a compressed air network in a print shop, which have an air pressure of e.g. B. has 6 bar. The compressed air supply path 20 from the Compressed air source 26 to pressure chamber 8 of pressure element 6 contains in Compressed air supply direction successively the pressure regulator 32 to reduce the Network pressure of z. B. 6 bar on z. B. 2 bar or 1.5 bar, which in Fig. 1 in Ventilation valve 22 (compressed air supply valve) shown in the closed position Quick exhaust valve 44 and the pressure switch 31.

Das Schnellentlüfungsventil hat einen Drucklufteingang "P", einen Druckluftausgang "A", und einen Entlüftungsausgang "R" mit einem Schalldämpfer 45.The quick exhaust valve has a compressed air inlet "P", one Compressed air outlet "A", and a vent outlet "R" with a Silencer 45.

Die von der Druckquelle 26 zugeführte Druckluft strömt vom Belüftung-Ventil 22 durch den Drucklufteingang "P" zum Druckluftausgang "A" des Schnellentlüftungsventils 44. Der Entlüftungsausgang "R" wird dabei verschlossen. Wenn zum Entlüften des Druckraumes 8 der Druck der Druckluft am Drucklufteingang "P" durch Umschalten des Entlüftungsventils 24 von einer Schließstellung in die in Fig. 1 gezeigte Offenstellung unter einen vorbestimmten Wert abfällt, dann wird automatisch auch der Druckluftausgang "A" über den Entlüftungsausgang "R" und den Schalldämpfer 45 entlüftet. Dadurch erreicht man eine schnellere Entlüftung des Druckraumes 8, als wenn die Entlüftung des Druckraumes 8 nur über das Entlüftungs-Ventil 24 erfolgen würde.The compressed air supplied from the pressure source 26 flows from the ventilation valve 22 through the compressed air inlet "P" to the compressed air outlet "A" of the Quick exhaust valve 44. The exhaust outlet "R" is thereby locked. When to vent the pressure chamber 8, the pressure of the compressed air at the compressed air inlet "P" by switching the vent valve 24 from one Closed position in the open position shown in Fig. 1 under one predetermined value drops, then the compressed air outlet automatically "A" vented via the vent outlet "R" and the silencer 45. This results in a faster ventilation of the pressure chamber 8 than when the venting of the pressure chamber 8 only takes place via the vent valve 24 would.

Das Belüftungs-Ventil 22 hat einen an den Ausgang des Druckreglers 32 angseschlossenen Drucklufteingang 48 und einen an den Drucklufteingang "P" des Schnellentlüftungsventils 44 angeschlossenen Druckluftausgang 50. Der Entlüftungseingang 46 des Entlüftungs-Ventils 24 ist an den Abschnitt 20-3 des Druckluftzufuhrweges 20 angeschlossen, welcher den Ausgang 50 des Belüftungs-Ventils 22 mit dem Drucklufteingang "P" des Schnellentlüftungsventils 44 verbindet. Der Druckentlastungsauslaß 28 des Entlüftungsventils 24 kann auch mit einem Schalldampfer 45 versehen sein.The ventilation valve 22 has one at the outlet of the pressure regulator 32 connected compressed air inlet 48 and one to the compressed air inlet "P" of the quick exhaust valve 44 connected compressed air outlet 50. The Vent inlet 46 of the vent valve 24 is at the section 20-3 of the Compressed air supply path 20 connected to the output 50 of the Ventilation valve 22 with the compressed air inlet "P" of the Quick exhaust valve 44 connects. The pressure relief outlet 28 of the Vent valve 24 can also be provided with a muffler 45.

Das Belüftungs-Ventil 22 wird von der Steuereinrichtung 34 jeweils in die Offenstellung und vom Druckschalter 31 in die Schließstellung geschaltet. Die Steuerleitung 49 des Druckschalters 30 ist vorzugsweise nicht direkt an das Belüftungs-Ventil 22 angeschlossen, sondern über die Steuereinrichtung 34. Das Entlüftungs-Ventil 24 wird von der Steuereinrichtung 34 sowohl in die Offenstellung als auch in die Schließstellung geschaltet.The ventilation valve 22 is in each case from the control device 34 Open position and switched from the pressure switch 31 to the closed position. The Control line 49 of the pressure switch 30 is preferably not directly to the Ventilation valve 22 connected, but via the control device 34. The vent valve 24 is both from the control device 34 in the Open position as well as switched to the closed position.

Gemäß der bevorzugten Ausführungsform sind das Belüftungs-Ventil 22 und das Entlüftungs-Ventil 24 sogenannte 3/2-Wegeventile, welche mit Steuerhilfsluft einer Steuerhilfsluftleitung 52 geschaltet werden, die an die Druckluftquelle 26 angeschlossen ist. Der Schaltvorgang wird von der Steuereinrichtung 34 ausgelöst bzw. durch den Druckschalter 31.According to the preferred embodiment, the vent valve 22 and the vent valve 24 so-called 3/2-way valves, which with Auxiliary control air of an auxiliary control air line 52 are connected to the Compressed air source 26 is connected. The switching process is from the Control device 34 triggered or by the pressure switch 31.

Um Ansprechverzögerungen wegen Strömungswiderständen in dem Druckluftzufuhrweg zu vermeiden, sind der Druckschalter 31 (vorzugsweise ein Vakuumschalter), das Schnellentlüftungsventil 44, das Belüftungs-Ventil 22 und das Entlüftungs-Ventil 24 möglichst nahe bei dem Druckraum 8 angeordnet, damit sich kurze Strömungswege ergeben. Der Druckschalter 31 ist vorzugsweise direkt an den Druckraum 8 angeschlossen oder sehr nahe an dessen Einlaß 56 für den Druckluftzufuhrweg 20.To response delays due to flow resistance in the To avoid compressed air supply path, the pressure switch 31 (preferably a Vacuum switch), the quick exhaust valve 44, the ventilation valve 22 and the vent valve 24 is arranged as close as possible to the pressure chamber 8, so that there are short flow paths. The pressure switch 31 is preferably connected directly to the pressure chamber 8 or very close to its inlet 56 for the compressed air supply path 20.

Aus Sicherheitsgründen zur Vermeidung von unerwünschten Überdrücken im Druckraum 8 kann dieser zusätzlich mit einem Überdruckventil 54 versehen sein, welches auf einen höheren Druck zum Öffnen eingestellt ist als der Solldruck im Druckraum 8.For safety reasons to avoid undesirable overpressures in the Pressure chamber 8 can additionally be provided with a pressure relief valve 54 be set to a higher pressure to open than that Target pressure in the pressure chamber 8.

Der Druckschalter 31 von Fig. 1 stellt eine Druckbegrenzungsmaßnahme dar, welche gemäß der Ausführungsform von Fig. 2 auch durch ein stattdessen an den Druckraum 8 oder nahe bei diesem, z. B. an dessen Drucklufteingang 56, an den Druckluftzufuhrweg 20 angeschlossenes Überdruckventil 30 gemäß Fig. 2 verwirklicht werden kann, welches öffnet, wenn im Druckraum 8 der Luftdruck über den Sollwert ansteigt, mit welchem die Druckluft das Andrückelement 6 an die Schmutzfläche andrücken soll. Hierfür könnte stattdessen auch das in Fig. 1 gezeigte Überdruckventil 54 verwendet werden. The pressure switch 31 of FIG. 1 represents a pressure limitation measure, which according to the embodiment of FIG. 2 also by instead the pressure chamber 8 or close to this, for. B. at its compressed air inlet 56, pressure relief valve 30 connected to the compressed air supply path 20 according to FIG. 2 can be realized, which opens when the air pressure in the pressure chamber 8 rises above the setpoint with which the compressed air increases the pressure element 6 should press the dirt surface. Instead, this could also be done in FIG. 1 shown relief valve 54 can be used.

Je höher der Druck in Druckluftleitungen ist, desto schneller pflanzt sich der Druck von einem Leitungsende zum anderen Leitungsende fort. Die Erfindung hat den Vorteil, daß einerseits nicht der meistens schwankende Netzdruck der Druckluftquelle 26 verwendet wird, welcher zu ungenauen Steuerungen des Andrückelementes 6 führen würde, und andererseits durch den Druckregler 32 ein geregelter Druck zur Verfügung steht, der höher ist als der Solldruck im Druckraum 8, so daß der erforderliche Luftdruck schnell von dem Druckregler 32 in den Druckraum 8 gelangt, jedoch ohne daß im Druckraum 8 ein höherer Druck als der Sollwert entsteht.The higher the pressure in compressed air lines, the faster it will plant Pressure continues from one line end to the other line end. The invention has the advantage that on the one hand not the mostly fluctuating network pressure Compressed air source 26 is used, which leads to inaccurate controls of the Pressure element 6 would lead, and on the other hand by the pressure regulator 32nd a regulated pressure is available that is higher than the set pressure in the Pressure chamber 8 so that the required air pressure quickly from the pressure regulator 32 reaches the pressure chamber 8, but without a higher one in the pressure chamber 8 Pressure is generated as the setpoint.

Claims (13)

  1. Cleaning device for the graphic industry for cleaning a continuous soiled surface (4) in a graphic industry machine, containing a pneumatically actuatable pressing element (6), by which a cloth section (18), extending over this pressing element (6), of a cleaning cloth movable relative to the pressing element can be placed against the soiled surface (4) or removed from it in turn, a pressure chamber (8) between a carrier (7) and the pressing element (6) movable relative to the carrier (7), a compressed air supply path (20) for connecting a pressure source (26) to the pressure chamber (8), a valve arrangement (22, 24) actuatable by a control device (34) for the controlled connection of the pressure chamber (8) either to the compressed air source (26) via the compressed air supply path (20) or to a pressure relief outlet (28),
    characterised in that
    the compressed air supply path (20) contains a pressure regulator (32) which is set at a lower pressure than the pressure of the compressed air source (26), but at a considerably higher pressure than the set pressure in the pressure chamber (8) by means of which the pressing element (6) is intended to place and press the cleaning cloth (10) against the soiled surface (4) and a pressure limiting measure (30, 31) is provided, which reacts to the pneumatic actual pressure actually prevailing in the pressure chamber (8) in such a way that the pressure chamber (8) can quickly be filled at the higher pressure of the pressure regulator and the pressing element (6) together with the cloth section (18) can quickly be placed against the soiled surface (4), yet the pressure in the pressure chamber (8) is limited to the set value.
  2. Cleaning device according to claim 1, characterised in that connected to the pressure chamber (8) as pressure limiting measure is a pressure switch (31), which is connected to the valve arrangement (22, 24) as a means of control and the valve arrangement switches over from allowing through to blocking the compressed air supply to the pressure chamber (8) when a value defined at the pressure switch, which is dimensioned in such a way that the set value is reached in the pressure chamber (8), has been reached.
  3. Cleaning device according to claim 2, characterised in that the pressure switch (31) is connected to the pressure chamber (8) via the compressed air supply path (20), wherein the pressure switch (31) is connected to the compressed air supply path (20) between the valve arrangement (22, 24) and the pressure chamber (8).
  4. Cleaning device according to claim 3, characterised in that the pressure switch (31) is directly connected to the pressure chamber (8).
  5. Cleaning device according to one of claims 2 to 4, characterised in that a quick deaerating valve (44) is connected to the pressure chamber (8) as pressure limiting measure.
  6. Cleaning device according to claim 5, characterised in that the quick deaerating valve (44) is connected to the pressure chamber (8) via the compressed air supply path (20), wherein the quick deaerating valve (44) is connected to the compressed air supply path (20) between the valve arrangement (22, 24) and the pressure chamber (8).
  7. Cleaning device according to claim 5, characterised in that the quick deaerating valve (44) is directly connected to the pressure chamber (8).
  8. Cleaning device according to one of claims 2 to 7, characterised in that the valve arrangement (22, 24) has an aerating valve (22) arranged in the compressed air supply path (20), which is open to the compressed air supply path into the pressure chamber (8) and is closed by the pressure switch (31) dependent on pressure in such a way that the set pressure arises in the pressure chamber (8), and the valve arrangement (22, 24) has a deaerating valve (24) the inlet (46) of which is connected to the pressure chamber (8) and the outlet (28) of which leads into the open air.
  9. Cleaning device according to claim 8, characterised in that the inlet (46) of the deaerating valve (24) is connected by means of flow to a section (20-3) of the compressed air supply path (20) which connects the aerating valve (22) to the pressure chamber (8).
  10. Cleaning device according to claim 9, characterised in that the inlet (46) of the deaerating valve (24) is directly connected to the pressure chamber (8).
  11. Cleaning device according to claim 9, characterised in that the inlet (46) of the deaerating valve (24) is connected to the compressed air supply path (20) at a point of the compressed air supply path (20) located between the aerating valve (22) and the quick deaerating valve (44).
  12. Cleaning device according to one of claims 5 to 11, characterised in that the quick deaerating valve (44) is of the kind which automatically deaerates into the open air if there is a fall in pressure of the compressed air it is monitoring.
  13. Cleaning device according to claim 1, characterised in that an excess pressure valve (30) limiting the air pressure of the pressure chamber (8) to the set value is connected to the pressure chamber (8).
EP00107021A 1999-05-03 2000-03-31 Cleaning device for the graphic industry Expired - Lifetime EP1060888B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19920231 1999-05-03
DE19920231A DE19920231A1 (en) 1999-05-03 1999-05-03 Cleaning device for drum in printing machine uses D-section press bar which pushes moving cleaning cloth against dirty surface of rotating drum
DE19926926 1999-06-14

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EP1060888A1 EP1060888A1 (en) 2000-12-20
EP1060888B1 true EP1060888B1 (en) 2003-05-21

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DE (3) DE19920231A1 (en)

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DE102005050480B3 (en) * 2005-10-21 2007-01-18 Voith Turbo Gmbh & Co. Kg Control air pressure controlling method for control air system for adjusting braking torque of e.g. water retarder, in motor vehicle, involves opening inlet and outlet valve to discharge compressed air through air inlet and delivery pipe
DE102022111889B3 (en) 2022-05-12 2023-07-20 Norgren Gmbh Control air system for a hydrodynamic retarder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DE4142422A1 (en) * 1991-12-20 1993-06-24 Baldwin Gegenheimer Gmbh DEVICE FOR CLEANING A ROTARY PRINTING MACHINE
DE19516422C2 (en) * 1995-05-04 1998-12-24 Bernd Dr Brenner Printing machine with a cleaning device provided for a cylinder
US5611281A (en) * 1995-05-08 1997-03-18 Serater Llc System for cleaning particles from a surface
US5842418A (en) * 1995-05-08 1998-12-01 Seratek Llc Apparatus and method for cleaning a roller
DE19605957A1 (en) * 1996-02-17 1997-08-21 Heidelberger Druckmasch Ag Device for cleaning the outer surface of cylinders in rotary printing machines

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DE19920231A1 (en) 2000-11-09
DE20006040U1 (en) 2000-06-15
DE50002238D1 (en) 2003-06-26
EP1060888A1 (en) 2000-12-20

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