EP0180075B1 - Inking device with rinsing and with a wiper in two parts - Google Patents

Inking device with rinsing and with a wiper in two parts Download PDF

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Publication number
EP0180075B1
EP0180075B1 EP85112809A EP85112809A EP0180075B1 EP 0180075 B1 EP0180075 B1 EP 0180075B1 EP 85112809 A EP85112809 A EP 85112809A EP 85112809 A EP85112809 A EP 85112809A EP 0180075 B1 EP0180075 B1 EP 0180075B1
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EP
European Patent Office
Prior art keywords
fountain
separator plate
ink
inking roller
inking
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
Application number
EP85112809A
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German (de)
French (fr)
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EP0180075A2 (en
EP0180075A3 (en
Inventor
Helmut Geretzki
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0180075A2 publication Critical patent/EP0180075A2/en
Publication of EP0180075A3 publication Critical patent/EP0180075A3/en
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Publication of EP0180075B1 publication Critical patent/EP0180075B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a rinsing inking unit for a rotary printing press, preferably a flexographic printing press, with a squeegee bar which can be set on the inking roller and which is provided between two doctoring knives which can be supported on the inking roller with a channel serving for ink supply and distribution and with devices for supplying and removing the ink.
  • Such a flushing inking unit is known from DE-A-3 135711.
  • This well-known flushing inking unit is used to ink the inking roller with only one color.
  • For certain prints, for example newspaper printing it is desirable to color a forme cylinder over areas of its axial length with two or more different colors.
  • the individual sections of the inking roller of different colors are separated from each other only by narrow ring strips.
  • the object of the invention is to provide a flushing inking unit of the type specified at the outset with at least two squeegee strips, which are separated from one another by ink separation devices on their mutually facing end faces, without the risk of faults due to the drying of paint and the impairment of the mobility of the ink separation devices.
  • this object is achieved in that at least two doctor blades are provided. between which, on a bolt parallel to the inking roller, there is pivotably mounted an ink separation plate which projects at right angles to the inking roller and which lies between the vertical line drawn through the center of gravity of the inking plate and the inking roller and above this center of gravity, so that the inking plate has a concave end face, which is curved in accordance with the radius of the inking roller and has a circumferential length covering the doctor blade, lies sealingly against the jacket of the inking roller under the effect of gravity, and that the doctor blades, which are provided with flat, end faces aligned with the side edges of the doctor blade and facing the ink separation plate, are axially displaceable and can be pressed sealingly onto the side surface of the color separation plate.
  • the width of the uncolored strip corresponds only to the thickness of the color separation plate.
  • the ink separating plate is pivoted on the bolt and is only guided between the end faces of the squeegee strips, so that there is no need to worry about sticking and smearing because special guides that could become clogged with drying ink are not available.
  • a color box for rotogravure printing presses is known, which is divided for the simultaneous printing with different colors over the length of the forme cylinder by partitions that are rubbed against the forme cylinder circumference.
  • the partition wall provided with a highly elastic sealing strip is screwed together with the parts of the ink fountain enclosing it, so that the partition wall does not move relative to those adjacent to it Squeegees can move.
  • a particularly good, sealing contact of the front edge of the ink separating plate on the jacket of the inking roller is ensured if the inking plate is pivotally mounted in an elongated hole on the bolt which runs in the direction of the inking roller, and that the inking plate is attacked by one above its center of gravity Spring is applied towards the inking roller.
  • the ink separator plate can not only perform a swiveling movement, but also a translatory movement in the direction of the inking roller, so that the front edge can fit sealingly against the jacket of the inking roller without the mobility of the ink separating plate in the radial plane of the inking roller would be affected by the storage.
  • the end face of the color separation plate is expediently provided with a groove, the legs surrounding the groove being provided with cutting-like end edges.
  • this scraper bar only slightly exceeds the width of the ink separating plate and strips any ink residues from the inking roller so that they do not get into the area of the ink separating plate and contaminate it can.
  • the scraper bar is so smooth that it can not interfere with a good contact of the ink separation plate on the jacket of the inking roller.
  • the ink separating plate is expediently held on the axis of the squeegee strips by means of clamping pieces.
  • the clamping pieces can be provided with an extension supporting the color separation plate.
  • the spring pressing the ink separating plate in its upper region against the inking roller can consist of a tension spring which is fastened on the one hand to the ink separating plate and on the other hand to the clamping pieces.
  • the squeegee strips can be mounted on the axis via bushings and pressure springs that surround the axis can be pressed against the ink separating plate, the pressure springs being supported on stops fixed to the frame.
  • An axis 3 is held in two support pieces 1, 2, which are firmly connected to the side walls, not shown, of a flexographic printing press for newspaper printing.
  • Two identical consoles 4, 5 are clamped onto the axis 3 in mirror image.
  • These brackets 4, have lugs 6 and 7, which are each provided with an elongated hole 8, 9.
  • a pin 10, on which a color separation plate 11 is suspended, extends through both elongated holes 8, 9.
  • the two lugs 6 and 7 are connected to one another via a further bolt 12 and secured against rotation, the bolt 12 being gripped in the free area between the lugs 6 and 7 by one end of a tension spring 13, which is connected at the other end with an adjusting screw 14 is.
  • This adjusting screw 14 is mounted in a lug 15, which is firmly connected to the color separation plate 11.
  • the two brackets 4 and 5 are clamped to the axis 3 and are at such a distance from one another that the pivoting movement of the color separation plate 11 around the bolt 10 is not hindered.
  • the ink separating plate 11 is pressed with its end face 16 against the inking roller 17, which transfers the ink to a plate cylinder 18.
  • the mounting of the bolt 10 is chosen so that its axis is offset from the center of gravity of the ink separating plate 11 in the direction of the inking roller 17.
  • the color separation plate 11 has a recess 19 in the region of the axis 3.
  • the ink separating plate 11 carries a holder 20 which carries a scraper bar 21, the width of which is greater than the thickness of the ink separating plate 11.
  • a pipe section 22 and 23 are attached to the axis 3 on both sides next to the consoles 4 and 5, which are connected to holders 24 and 25.
  • the holders 24 carry the ink chamber doctor blade 26 and the holders 26 the ink chamber doctor blade 27.
  • the facing end faces of the two ink chamber doctor blades 26 and 27 are open. They lie on both sides sealingly against the color separating plate 11, which is provided with an ink-repellent covering.
  • This covering can be Teflon, for example.
  • the pressing force for the two ink chamber doctor blades 26 and 27 is generated by compression springs 28 'and 29' which are supported on the one hand on the support pieces 1 and 2 and on the other hand on the end faces of the tube pieces 22 and 23 facing away from one another. There is so much free space between the two pipe sections 22 and 23 and the two brackets 4 and 5 that a sealing contact of the ink chamber end faces of the ink separating plate 11 is always guaranteed.
  • the ink chamber doctor blades 26 and 27 each have an ink chamber 28 and 29 and a color return bore 30 and 31 assigned to each ink chamber. Excess paint runs through this color return bore 30 and 31 into an ink collecting trough 33, which is divided into two by a plate 32. As is known per se, the face ends of the ink chamber doctor blades 26 and 27 are closed by spray plates.
  • the ink chambers 28 and 29 are closed on the circumference by squeegees 34 and 35.
  • the paint is supplied to the paint chambers 28, 29 through lines, not shown.

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

Description

Die Erfindung betrifft ein Spülfarbwerk für eine Rotationsdruckmaschine, vorzugsweise Flexodruckmaschine, mit einer an die Farbauftragswalze anstellbaren Rakelleiste, die zwischen zwei auf der Farbauftragswalze abstützbaren Rakelmessern mit einer der Farbzuführung und -verteilung dienenden Rinne und mit Einrichtungen zum Zu-und Abführen der Farbe versehen ist.The invention relates to a rinsing inking unit for a rotary printing press, preferably a flexographic printing press, with a squeegee bar which can be set on the inking roller and which is provided between two doctoring knives which can be supported on the inking roller with a channel serving for ink supply and distribution and with devices for supplying and removing the ink.

Ein derartiges Spülfarbwerk ist aus der DE-A-3 135711 bekannt. Dieses bekannte Spülfarbwerk dient der Einfärbung der Farbauftragswalze mit nur einer Farbe. Für bestimmte Drucke, beispielsweise den Zeitungsdruck, ist es erwünscht, einen Formzylinder über Bereiche seiner axialen Länge mit zwei oder mehreren unterschiedlichen Farben einzufärben. Hierzu ist es erforderlich, die Farbauftragswalze entsprechend mit zwei oder mehreren Rakelleisten zu versehen, die in radialen Ebenen der Farbauftragswalze relativ zueinander durch Farbtrenneinrichtungen voneinander getrennt sein müssen, so daß die Farbauftragswalze über die gewünschten Bereiche mit unterschiedlichen Farben eingefärbt werden kann, ohne daß ein Verschmieren oder Vermischen der Farben erfolgt. Die einzelnen Abschnitte der Farbauftragswalze unterschiedlicher Farben sind nur durch schmale Ringstreifen voneinander getrennt.Such a flushing inking unit is known from DE-A-3 135711. This well-known flushing inking unit is used to ink the inking roller with only one color. For certain prints, for example newspaper printing, it is desirable to color a forme cylinder over areas of its axial length with two or more different colors. For this purpose, it is necessary to provide the inking roller accordingly with two or more doctor blades, which must be separated from one another in the radial planes of the inking roller relative to one another by ink separation devices, so that the inking roller can be inked with different colors over the desired areas without smearing or mixing the colors. The individual sections of the inking roller of different colors are separated from each other only by narrow ring strips.

Aufgabe der Erfindung ist es, ein Spülfarbwerk der eingangs angegebenen Art mit mindestens zwei Rakelleisten zu schaffen, die durch Farbtrenneinrichtungen auf ihren einander zugewandten Stirnseiten voneinander getrennt sind, ohne daß Störungen infolge des Antrocknens von Farbe und der Beeinträchtigung der Beweglichkeit der Farbtrenneinrichtungen befürchtet werden müssen.The object of the invention is to provide a flushing inking unit of the type specified at the outset with at least two squeegee strips, which are separated from one another by ink separation devices on their mutually facing end faces, without the risk of faults due to the drying of paint and the impairment of the mobility of the ink separation devices.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß mindestens zwei Rakelleisten vorgesehen sind. zwischen denen auf einem zu der Farbauftragswalze parallelen Bolzen eine zu der Farbauftragswalze rechtwinkelig abstehende Farbtrennplatte schwenkbar gelagert ist, der zwischen der vertikalen, durch den Schwerpunkt der Farbauftragsplatte gezogenen Linie und der Farbauftragswalze und oberhalb dieses Schwerpunkts liegt, so daß die Farbtrennplatte mit einer konkaven Stirnseite, die entsprechend dem Radius der Farbauftragswalze gekrümmt ist und eine die Rakelmesser überdeckende Umfangslänge aufweist, unter Schwerkraftwirkung dichtend an dem Mantel der Farbauftragswalze anliegt, und daß die Rakelleisten, die mit ebenen, mit den Seitenkanten der Rakelmesser fluchtenden seitlichen, der Farbtrennplatte zugewandten Stirnflächen versehen sind, axial verschieblich gelagert und dichtend an die Seitenfläche der Farbtrennplatte andrückbar sind.According to the invention, this object is achieved in that at least two doctor blades are provided. between which, on a bolt parallel to the inking roller, there is pivotably mounted an ink separation plate which projects at right angles to the inking roller and which lies between the vertical line drawn through the center of gravity of the inking plate and the inking roller and above this center of gravity, so that the inking plate has a concave end face, which is curved in accordance with the radius of the inking roller and has a circumferential length covering the doctor blade, lies sealingly against the jacket of the inking roller under the effect of gravity, and that the doctor blades, which are provided with flat, end faces aligned with the side edges of the doctor blade and facing the ink separation plate, are axially displaceable and can be pressed sealingly onto the side surface of the color separation plate.

Bei dem erfindungsgemäßen Spülfarbwerk entspricht die Breite des uneingefärbten Streifens nur der Dicke der Farbtrennplatte. Die Farbtrennplatte ist pendelnd auf dem Bolzen gelagert und nur zwischen den Stirnflächen der Rakelleisten geführt, so daß ein Verkleben und Verschmieren nicht zu befürchten ist, weil besondere Führungen, die sich mit trocknender Farbe zusetzen könnten, nicht vorhanden sind.In the flushing inking unit according to the invention, the width of the uncolored strip corresponds only to the thickness of the color separation plate. The ink separating plate is pivoted on the bolt and is only guided between the end faces of the squeegee strips, so that there is no need to worry about sticking and smearing because special guides that could become clogged with drying ink are not available.

Aus der DE-B-1 224 327 ist ein Farbkasten für Tiefdruckrotationsmaschinen bekannt, der zum gleichzeitigen Drucken mit verschiedenen Farben über die Länge des Formzylinders durch an den Formzylinderumfang schleifend angestellte Trennwände unterteilt ist. Abgesehen davon, daß der bekannte Farbkasten nicht mit zwei auf der Farbauftragswalze abstützbaren Rakelmessern versehen ist, ist die mit einer hochelastischen Dichtleiste versehene Trennwand mit den diese einfassenden Teilen des Farbkastens zu einer Einheit verschraubt, so daß sich die Trennwand nicht relativ zu den an diese angrenzenden Rakelleisten bewegen kann.From DE-B-1 224 327 a color box for rotogravure printing presses is known, which is divided for the simultaneous printing with different colors over the length of the forme cylinder by partitions that are rubbed against the forme cylinder circumference. Apart from the fact that the known ink fountain is not provided with two doctor blades which can be supported on the ink application roller, the partition wall provided with a highly elastic sealing strip is screwed together with the parts of the ink fountain enclosing it, so that the partition wall does not move relative to those adjacent to it Squeegees can move.

Aus der nicht vorveröffentlichten DE-A-3 320 638 ist eine durch zwei Rakelmesser rinnenförmig geschlossene Farbauftragsleiste bekannt, die durch Farbtrennbleche entsprechend unterschiedlichen zu druckenden Farben in Abschnitte unterteilt ist. Die Farbtrennbleche sind in der Führung dienenden Ausnehmungen der Farbauftragsleiste geführt und durch Blattfedern gegen die Rasterwalze angedrückt. Insbesondere bei der Verwendung von schnell trocknenden Farben besteht jedoch die Gefahr, daß die Beweglichkeit der Farbtrennbleche durch in den der Führung dienenden Ausnehmungen antrocknende Farbe beeinträchtigt wird.From the unpublished DE-A-3 320 638 a paint application bar is known, which is closed by two doctor blades and is divided into sections by color separating plates according to different colors to be printed. The ink dividing plates are guided in the recesses of the ink application bar and are pressed against the anilox roller by leaf springs. However, especially when using fast-drying inks, there is a risk that the mobility of the color separating plates will be impaired by paint drying in the recesses used for guiding.

Eine besonders gute, dichtende Anlage der Stirnkante der Farbtrennplatte auf dem Mantel der Farbauftragswalze ist gewährleistet, wenn die Farbtrennplatte in einem Langloch schwenkbar auf dem Bolzen gelagert ist, das in Richtung auf die Farbauftragswalze verläuft, und daß die Farbtrennplatte durch eine oberhalb von deren Schwerpunkt angreifende Feder in Richtung auf die Farbauftragswalze beaufschlagt ist.A particularly good, sealing contact of the front edge of the ink separating plate on the jacket of the inking roller is ensured if the inking plate is pivotally mounted in an elongated hole on the bolt which runs in the direction of the inking roller, and that the inking plate is attacked by one above its center of gravity Spring is applied towards the inking roller.

Durch diese Art der Lagerung kann die Farbtrennplatte nicht nur eine Schwenkbewegung, sondern zusätzlich auch eine translatorische Bewegung in Richtung auf die Farbauftragswalze ausführen, so daß sich die Stirnkante entsprechend ihrer Kontur an den Mantel der Farbauftragswalze dichtend anlegen kann, ohne daß die Beweglichkeit der Farbtrennplatte in der radialen Ebene der Farbauftragswalze durch die Lagerung beeinträchtigt wäre.With this type of storage, the ink separator plate can not only perform a swiveling movement, but also a translatory movement in the direction of the inking roller, so that the front edge can fit sealingly against the jacket of the inking roller without the mobility of the ink separating plate in the radial plane of the inking roller would be affected by the storage.

Zweckmäßigerweise ist die Stirnseite der Farbtrennplatte mit einer Nut versehen, wobei die die Nut einfassenden Schenkel mit schneidenartigen Stirnkanten versehen sind.The end face of the color separation plate is expediently provided with a groove, the legs surrounding the groove being provided with cutting-like end edges.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß im Bereich der unteren Stirnkante der Farbtrennplatte eine zu der Farbauftragswalze parallele Schableiste angeordnet ist, deren Länge die Breite der Farbtrennplatte übersteigt.According to a preferred embodiment, it is provided that in the region of the lower end edge of the ink separating plate there is a scraper bar parallel to the ink application roller, the length of which exceeds the width of the ink separating plate.

Diese Schableiste übersteigt in ihrer Länge die Breite der Farbtrennplatte nur wenig und streift eventuelle Farbrückstände von der Farbauftragswalze ab, so daß diese nicht in den Bereich der Farbtrennplatte gelangen und diese verunreinigen können. Die Schableiste ist so geschmeidig ausgeführt, daß sie eine gute Anlage der Farbtrennplatte an dem Mantel der Farbauftragswalze nicht beeinträchtigen kann.The length of this scraper bar only slightly exceeds the width of the ink separating plate and strips any ink residues from the inking roller so that they do not get into the area of the ink separating plate and contaminate it can. The scraper bar is so smooth that it can not interfere with a good contact of the ink separation plate on the jacket of the inking roller.

Zweckmäßigerweise wird die Farbtrennplatte über Klemmstücke auf der Achse der Rakelleisten gehalten. Dabei können die Klemmstücke mit einem die Farbtrennplatte lagernden Fortsatz versehen sein. Die die Farbtrennplatte in ihrem oberen Bereich gegen die Farbauftragswalze andrückende Feder kann aus einer Zugfeder bestehen, die einerseits auf der Farbtrennplatte und andererseits an den Klemmstücken befestigt ist.The ink separating plate is expediently held on the axis of the squeegee strips by means of clamping pieces. The clamping pieces can be provided with an extension supporting the color separation plate. The spring pressing the ink separating plate in its upper region against the inking roller can consist of a tension spring which is fastened on the one hand to the ink separating plate and on the other hand to the clamping pieces.

Die Rakelleisten können über Buchsen auf der Achse gelagert und durch die Achse einfassende Druckfedern gegen die Farbtrennplatte angedrückt sein, wobei sich die Druckfedern auf gestellfeste Anschläge abstützen.The squeegee strips can be mounted on the axis via bushings and pressure springs that surround the axis can be pressed against the ink separating plate, the pressure springs being supported on stops fixed to the frame.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

  • Fig. 1 eine Seitenansicht des Spülfarbwerks, teilweise im Schnitt gemäß der Linie I-I in Fig. 2,
  • Fig. 2 eine Vorderansicht des Spülfarbwerks nach Fig. 1, teilweise im Schnitt, und
  • Fig. 3 einen teilweisen Schnitt durch die Farbtrennplatte längs der Linie 111-111 in Fig. 2.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • 1 is a side view of the flushing inking unit, partly in section along the line II in Fig. 2,
  • Fig. 2 is a front view of the flushing inking unit according to Fig. 1, partly in section, and
  • 3 shows a partial section through the color separation plate along the line 111-111 in FIG. 2.

In zwei Tragstücken 1, 2, die mit den nicht dargestellten Seitenwänden einer Flexodruckmaschine für den Zeitungsdruck fest verbunden sind, ist eine Achse 3 gehaltert. Auf die Achse 3 sind spiegelbildlich zwei gleich ausgestaltete Konsolen 4, 5 aufgeklemmt. Diese Konsolen 4, weisen Ansätze 6 und 7 auf, die je mit einem Langloch 8, 9 versehen sind. Durch beide Langlöcher 8, 9 greift ein Bolzen 10, an welchem eine Farbtrennplatte 11 aufgehängt ist. Die beiden Ansätze 6 und 7 sind noch über einen weiteren Bolzen 12 miteinander verbunden und gegen Verdrehung gesichert, wobei der Bolzen 12 in dem freien Bereich zwischen den Ansätzen 6 und 7 von einem Ende einer Zugfeder 13 umgriffen wird, welche andernends mit einer Verstellschraube 14 verbunden ist. Diese Verstellschraube 14 ist in einem Böckchen 15 gelagert, das mit der Farbtrennplatte 11 fest verbunden ist. Die beiden Konsolen 4 und 5 sind mit der Achse 3 verklemmt und weisen einen solchen Abstand zueinander auf, daß die Schwenkbewegung der Farbtrennplatte 11 um den Bolzen 10 nicht behindert wird.An axis 3 is held in two support pieces 1, 2, which are firmly connected to the side walls, not shown, of a flexographic printing press for newspaper printing. Two identical consoles 4, 5 are clamped onto the axis 3 in mirror image. These brackets 4, have lugs 6 and 7, which are each provided with an elongated hole 8, 9. A pin 10, on which a color separation plate 11 is suspended, extends through both elongated holes 8, 9. The two lugs 6 and 7 are connected to one another via a further bolt 12 and secured against rotation, the bolt 12 being gripped in the free area between the lugs 6 and 7 by one end of a tension spring 13, which is connected at the other end with an adjusting screw 14 is. This adjusting screw 14 is mounted in a lug 15, which is firmly connected to the color separation plate 11. The two brackets 4 and 5 are clamped to the axis 3 and are at such a distance from one another that the pivoting movement of the color separation plate 11 around the bolt 10 is not hindered.

Über die Zugfeder 13 wird dabei die Farbtrennplatte 11 mit ihrer Stirnseite 16 gegen die Farbauftragswalze 17 gedrückt, die die Farbe auf einen Plattenzylinder 18 überträgt. Die Lagerung des Bolzens 10 ist dabei so gewählt, daß dessen Achse gegenüber dem Schwerpunkt der Farbtrennplatte 11 in Richtung auf die Farbauftragswalze 17 hin versetzt ist.About the tension spring 13, the ink separating plate 11 is pressed with its end face 16 against the inking roller 17, which transfers the ink to a plate cylinder 18. The mounting of the bolt 10 is chosen so that its axis is offset from the center of gravity of the ink separating plate 11 in the direction of the inking roller 17.

Um die Schwenkbewegung der Farbtrennplatte 11 um den Bolzen 10 zu gewährleisten, weist die Farbtrennplatte 11 im Bereich der Achse 3 eine Ausnehmung 19 auf. Im unteren Bereich trägt die Farbtrennplatte 11 einen Halter 20, der eine Schableiste 21 trägt, deren Breite größer ist als die Stärke der Farbtrennplatte 11. Die Ausbildung der Farbtrennplatte 11 in dem Bereich, in dem sie mit ihrer Stirnseite 16 an der Farbauftragswalze 17 anliegt, geht aus der Fig. 3 hervor.In order to ensure the pivoting movement of the color separation plate 11 around the bolt 10, the color separation plate 11 has a recess 19 in the region of the axis 3. In the lower area, the ink separating plate 11 carries a holder 20 which carries a scraper bar 21, the width of which is greater than the thickness of the ink separating plate 11. The formation of the ink separating plate 11 in the area in which its front face 16 rests on the ink application roller 17, can be seen from Fig. 3.

Wie die Fig. 2 erkennen läßt, sind auf die Achse 3 beidseits neben den Konsolen 4 und 5 je ein Rohrstück 22 und 23 aufgesetzt, die mit Haltern 24 und 25 verbunden sind. Die Halter 24 tragen dabei das Farbkammerrakel 26 und die Halter 26 das Farbkammerrakel 27. Die einander zugewandten Stirnseiten der beiden Farbkammerrakeln 26 und 27 sind offen. Sie legen sich von beiden Seiten dichtend gegen die Farbtrennplatte 11 an, die mit einem farbabweisenden Belag versehen ist. Dieser Belag kann beispielsweise Teflon sein.As can be seen in FIG. 2, a pipe section 22 and 23 are attached to the axis 3 on both sides next to the consoles 4 and 5, which are connected to holders 24 and 25. The holders 24 carry the ink chamber doctor blade 26 and the holders 26 the ink chamber doctor blade 27. The facing end faces of the two ink chamber doctor blades 26 and 27 are open. They lie on both sides sealingly against the color separating plate 11, which is provided with an ink-repellent covering. This covering can be Teflon, for example.

Die Andrückkraft für die beiden Farbkammerrakel 26 und 27 wird von Druckfedern 28' und 29' erzeugt, welche sich einerseits an den Tragstükken 1 und 2 und andererseits an den einander abgewandten Stirnflächen der Rohrstücke 22 und 23 abstützen. Zwischen den beiden Rohrstücken 22 und 23 und den beiden Konsolen 4 und 5 ist so viel Freiraum vorhanden, daß eine dichtende Anlage der Farbkammerrakel-Stirnseiten an der Farbtrennplatte 11 immer gewährleistet ist. Die Farbkammerrakeln 26 und 27 weisen je eine Farbkammer 28 und 29 sowie eine jeder Farbkammer zugeordnete Farbrücklaufbohrung 30 und 31 auf. Durch diese Farbrücklaufbohrung 30 und 31 läuft überschüssige Farbe in eine durch ein Blech 32 zweigeteilte Farbauffangwanne 33. Die einander abgewandten Stirnseiten der Farbkammerrakeln 26 und 27 sind, wie an sich bekannt, durch Spritzbleche geschlossen. Umfangsseitig sind die Farbkammern 28 und 29 durch Rakel 34 und 35 geschlossen.The pressing force for the two ink chamber doctor blades 26 and 27 is generated by compression springs 28 'and 29' which are supported on the one hand on the support pieces 1 and 2 and on the other hand on the end faces of the tube pieces 22 and 23 facing away from one another. There is so much free space between the two pipe sections 22 and 23 and the two brackets 4 and 5 that a sealing contact of the ink chamber end faces of the ink separating plate 11 is always guaranteed. The ink chamber doctor blades 26 and 27 each have an ink chamber 28 and 29 and a color return bore 30 and 31 assigned to each ink chamber. Excess paint runs through this color return bore 30 and 31 into an ink collecting trough 33, which is divided into two by a plate 32. As is known per se, the face ends of the ink chamber doctor blades 26 and 27 are closed by spray plates. The ink chambers 28 and 29 are closed on the circumference by squeegees 34 and 35.

Die Farbe wird den Farbkammern 28, 29 durch nicht dargestellte Leitungen zugeführt.The paint is supplied to the paint chambers 28, 29 through lines, not shown.

Infolge der Schwerkraftwirkung der pendelnd aufgehängten Farbtrennplatte 11 wird der untere Bereich der Stirnkante 16 stärker an den Mantel der Farbauftragswalze 17 angedrückt als der obere Bereich. Die Zugfeder 13 schafft einen entsprechenden Ausgleich, da der Bolzen 10 in dem Langloch 8 verschieblich geführt ist.As a result of the force of gravity of the oscillatingly suspended ink separating plate 11, the lower region of the front edge 16 is pressed more strongly against the jacket of the inking roller 17 than the upper region. The tension spring 13 creates a corresponding compensation, since the bolt 10 is guided displaceably in the slot 8.

Durch entsprechende Einstellung der Vorspannung der Feder 13 wird ein gleichmäßiger Andruck der Stirnkante 16 der Farbtrennplatte 11 über ihre gesamte Länge erreicht. Die im unteren Bereich der Farbtrennplatte 11 angeordnete Schableiste 21 ist mit relativ schwachem Andruck an den Mantel der Farbauftragswalze 17 angestellt und hält den Umfangsbereich der Farbtrennplatte von eventuellen Farbrückständen frei.By appropriate adjustment of the bias of the spring 13, a uniform pressure of the end edge 16 of the color separation plate 11 is achieved over its entire length. The scraper bar 21 arranged in the lower region of the ink separating plate 11 is applied to the jacket of the ink application roller 17 with relatively weak pressure and keeps the peripheral region of the ink separating plate free of any color residues.

Claims (6)

1. A rinsable inking unit for a rotary press, preferably for a flexographic printing press, comprising at least one doctor bar (26, 27), which is engageable with the inking roller (17), which unit is provided between two doctor blades (34, 35), which are adapted to bear on the inking roller (17), with an ink compartment (28, 29) for supplying and distributing ink and with means for supplying and removing (30) the ink, characterized in that at least two doctor bars (26, 27) are provided, a fountain separator plate (11), which protrudes at right angles from the inking roller (17) is pivoted between said doctor bars (26, 27) on a pin (10), which is parallel to the inking roller (17), the pin (10), which constitutes the pivot, is disposed between the vertical line which is drawn through the centre of gravity of the fountain separator plate (11) and the inking roller (17) and above that centre of gravity so that a concave end face (16) of the fountain separator plate (11), which concave end face is curved in accordance with the radius of the inking roller (17) and has a circumferential length covering the doctor blades (34, 35) is urged by gravity into sealing contact with the circumference of the inking roller (17), the doctor bars (26, 27) are provided with planar end faces, which are aligned with the side edges of the doctor blades (34, 35) and face the fountain separator plate (11), and the doctor bars (26, 27) are axially displaceably mounted and are adapted to be urged into sealing contact with the side faces of the fountain separator plate (11).
2. A rinsable inking unit according to claim 1, characterized in that the fountain separator plate (11) is pivoted on the pin (10) in a slot (8), which extends towards the inking roller (17), and the fountain separator plate (11) is urged towards the inking roller (17) by a spring (13), which engages the fountain separator plate (11) above its centre of gravity.
3. A rinsable inking unit according to claim 1 or 2, characterized in that the end face of the fountain separator plate (11) is provided with a groove and the legs which confine the groove are provided with end edges (16) which are similar to knife edges.
4. A rinsable inking unit according to any of claims 1 to 3, characterized in that a scraper bar (21) which is parallel to the inking roller (17) and has a length in excess of the thickness of the fountain separator plate (11) is disposed adjacent to the lower end edge of the fountain separator plate (11).
5. A rinsable inking unit according to any of claims 1 to 4, characterized in that the doctor bars (26, 27) are movably mounted by means of bushings (22, 23) on a pivot (3) and by compression springs (28', 29') which surround the pivot (3) are urged against the fountain separator plate (11), and the fountain separator plate (11) is held by the pivot (3) through the intermediary of clamping members (4, 5).
6. A rinsable inking unit according to any of claims 1 to 5, characterized in that those portions of the doctor bars (26, 27) which face the fountain separator plate (11) are provided with ink return bores (30), which open into the ink compartments (28, 29).
EP85112809A 1984-10-30 1985-10-09 Inking device with rinsing and with a wiper in two parts Expired EP0180075B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3439713 1984-10-30
DE3439713 1984-10-30
DE3505598 1985-02-18
DE3505598A DE3505598C2 (en) 1984-10-30 1985-02-18 Rinse inking unit with divided chamber doctor blade

Publications (3)

Publication Number Publication Date
EP0180075A2 EP0180075A2 (en) 1986-05-07
EP0180075A3 EP0180075A3 (en) 1986-10-22
EP0180075B1 true EP0180075B1 (en) 1989-03-01

Family

ID=25826106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112809A Expired EP0180075B1 (en) 1984-10-30 1985-10-09 Inking device with rinsing and with a wiper in two parts

Country Status (3)

Country Link
US (1) US4667595A (en)
EP (1) EP0180075B1 (en)
DE (1) DE3505598C2 (en)

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US6213017B1 (en) 1996-10-25 2001-04-10 Koenig & Bauer Aktiengesellschaft Ink duct pivotable between two positions

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Also Published As

Publication number Publication date
DE3505598C2 (en) 1986-08-14
DE3505598A1 (en) 1986-04-30
US4667595A (en) 1987-05-26
EP0180075A2 (en) 1986-05-07
EP0180075A3 (en) 1986-10-22

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