EP0040287B1 - Device for colour dosage in a colour box for offset or high pressure printing machines - Google Patents

Device for colour dosage in a colour box for offset or high pressure printing machines Download PDF

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Publication number
EP0040287B1
EP0040287B1 EP81100604A EP81100604A EP0040287B1 EP 0040287 B1 EP0040287 B1 EP 0040287B1 EP 81100604 A EP81100604 A EP 81100604A EP 81100604 A EP81100604 A EP 81100604A EP 0040287 B1 EP0040287 B1 EP 0040287B1
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EP
European Patent Office
Prior art keywords
ink
metering
metering elements
support
elements
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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
EP81100604A
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German (de)
French (fr)
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EP0040287A1 (en
Inventor
Willi Jeschke
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0040287A1 publication Critical patent/EP0040287A1/en
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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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • the invention relates to an ink metering device in an ink fountain for offset or high-pressure machines with metering and support areas arranged next to one another in the axial direction of the ink fountain roller, the metering areas being formed by metering elements which can be set to different ink gap thicknesses and are elastically mounted metering elements, so that the support areas are thus always directly under spring pressure or rest indirectly on the ink fountain roller, adjusting means being provided for adjusting the metering elements.
  • a color box of the type mentioned is known from DE-B 26 48 098, in which both support and metering areas are arranged on the individual zone-wide adjusting elements arranged next to one another in the axial direction of the ink box roller.
  • the storage of each individual control element on individual pressure bars that are resiliently supported on the ink fountain base enables the ink film thickness to be adjusted at any time via the metering ranges. Fluctuations in the color film thickness, e.g. prevented by non-circular running of the ink fountain roller. There is no mutual interference between adjacent zones.
  • the reproducibility of the ink film mentioned is indispensable especially for the remote control of the ink zones used in modern machine designs.
  • control elements since the control elements must be provided with both the support and the metering surfaces, very careful processing of the same is required. Furthermore, all control elements of the ink metering device must be mounted individually on the ink fountain, which results in a considerable assembly and adjustment effort for the ink metering device.
  • the invention is therefore based on the object, while maintaining the reproducibility and the zonal adjustment of the color film very essential advantages of a device according to DE-B 26 48 098, to create an ink metering device in an ink fountain for offset or high-pressure machines, which due to its constructive Design forms a compact, pre-adjustable unit, with which the manufacturing outlay is reduced and both the assembly and the adjustment work of the ink metering device are facilitated.
  • the advantages achieved by the invention are essentially to be seen in the fact that the ink metering device with the metering elements in the continuous support bar together with the adjusting means can be placed on the ink fountain as a fully assembled and optionally pre-adjusted unit, since there is the possibility of an adjustment or Zero adjustment of all dosing elements, e.g. on an appropriate test bench or similar device, before installing it in the ink fountain. Furthermore, the production of the dosing elements is simplified since the support areas are now also formed by the flexible support strip. Furthermore, the ink-free area created on the ink fountain roller is very limited. since on average only a single narrow support web is required for each dosing element, which facilitates the rubbing of the color-free strips.
  • the effectiveness of the device according to the invention is determined by an appropriate choice or combination of the rigidity of the elastic area of the bar and the hardness of the springs, which ensure that the support bar is in constant contact with the inking roller over the support webs.
  • this is covered by an elastic film, via which the support areas are constantly in contact with the ink fountain roller.
  • the film can deform in the metering areas to allow the desired passage of color.
  • the metering elements are designed as flat pieces and can be displaced tangentially to the ink fountain roller.
  • a further embodiment of the invention is characterized in that springs and electromagnets are assigned to the dosing elements as adjusting means, which continuously place them in pulsed form on the ink fountain roller during the ink supply and lift a certain gap, pulse frequency and stroke time being adjustable.
  • the ink fountain 1 shown in FIG. 1 with the ink metering device 2 attached to it is rotatably mounted on a joint 3 and can be pivoted away from the ink fountain roller 4.
  • the color metering device 2 which consists essentially of the elastic support bar 5, which is formed as flat pieces
  • Deten metering elements 6 and the set screws 7 is attached to this in the upper region of the ink fountain 1 by means of screw connections 8 and rests on the base plate 9 of the ink fountain 1.
  • the elastic support strip 5 is pressed onto the ink fountain roller 4 by means of corresponding springs 12 via the support webs 11.
  • the metering elements 6, which are designed as flat pieces, are fitted between the support webs 11.
  • the entire ink metering device 2 is covered by an elastic film 14. On one side of this film 14 holes 15 are punched at certain intervals over the entire length. Furthermore, small pins 16 are provided at a corresponding point in the upper region of the support webs, into which the elastic film 14 is then hung.
  • the ink 18 is located in the wedge-shaped space between the film 14, the ink fountain roller 4 and the side walls 17 of the ink fountain.
  • Two holding screws 19 are provided on the underside of each metering element 6, which with their correspondingly dimensioned shaft 20 in underneath the screw head If longitudinal grooves 21 of the elastic support bar 5 engage, it is achieved that the metering elements 6 are connected to the elastic support bar 5, but a limited displacement of the metering elements 6 in the longitudinal direction is possible.
  • set screws 7 are provided according to FIGS. 1 and 3. In the upper region of the elastic support bar 5, threads 22 are provided at regular intervals to accommodate said set screws 7.
  • a ring 23 is attached to the shaft of each set screw 7, which engages in a recess 24 on the underside of each metering element 6 and when the set screw 7 is actuated, the Longitudinal displacement of the metering element 6 causes.
  • This longitudinal displacement changes the gap between ink fountain roller 4 and metering edge 10, which results in a zone-wide change in the ink layer thickness.
  • the metering edge 10 can be designed in such a way that no dynamic pressure can build up at this point.
  • the ink metering device 26 can be placed on the ink fountain 1 as a compact structural unit and, as in the embodiment according to FIGS. 1 to 3, fastened thereon. This also happens here again in the upper region of the ink fountain 1, while in the lower region a contact with the ink fountain roller 4 takes place by means of corresponding springs 12. In the area of this resilient system, where the dosing of the ink 18 to be transported by the ink fountain roller 4 is carried out, in the elastic region 13 of the support bar 27 electromagnets 28 are fastened to the latter.
  • the electromagnets 28, the connections of which are not shown, are assigned together with springs 29 to the metering elements 30 as actuating means in order to continuously position the metering elements 30 in pulsed fashion against the ink fountain roller 4 and to lift a certain gap, the pulse frequency and stroke time being adjustable.
  • This gap corresponds to the distance 31 between the metering element 30 and the electromagnet 28. Because of the resilient contact of the elastic support strip 27 with the electromagnets 28 attached to it on the ink fountain roller 4 and the simultaneously resilient contact of the metering elements 30, this distance 31 is constant at all times even under different operating conditions and reproducible.
  • the screw connection between the metering element 30 and the support bar 27 is carried out by interposed spacers 32 so that each metering element 30 is given the necessary freedom in the vertical direction to be able to carry out the adjusting movements.
  • the metering edge 33 is again designed so that no back pressure can build up.
  • an elastic film 34 which is attached to the metering elements 30 in the upper region.

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

Description

Die Erfindung betrifft eine Farbdosiereinrichtung in einem Farbkasten für Offset- oder Hochdruckmaschinen mit in Achsrichtung der Farbkastenwalze nebeneinander angeordneten Dosier-und Stützbereichen, wobei die Dosierbereiche von auf zonal unterschiedliche Farbspaltdicken einstellbaren und elastisch gelagerten Dosierelementen gebildet werden, so dass die Stützbereiche somit unter Federdruck ständig direkt oder indirekt an der Farbkastenwalze anliegen, wobei zur Verstellung der Dosierelemente Stellmittel vorgesehen sind.The invention relates to an ink metering device in an ink fountain for offset or high-pressure machines with metering and support areas arranged next to one another in the axial direction of the ink fountain roller, the metering areas being formed by metering elements which can be set to different ink gap thicknesses and are elastically mounted metering elements, so that the support areas are thus always directly under spring pressure or rest indirectly on the ink fountain roller, adjusting means being provided for adjusting the metering elements.

Ein Farbkasten der eingangs genannten Art ist aus der DE-B 26 48 098 bekannt, bei dem an den einzelnen in Achsrichtung der Farbkastenwalze nebeneinander angeordneten zonenbreiten Stellelementen selbst sowohl Stütz- als auch Dosierbereiche angeordnet sind. Durch die Lagerung jedes einzelnen Stellelementes auf einzelnen, am Farbkastenboden federnd abgestützten Druckleisten wird über die Dosierbereiche eine jederzeit reproduzierbare Einstellung der Farbfilmdicke verwirklicht. Weiterhin werden Schwankungen der Farbfilmdicke, z.B. durch unrunden Lauf der Farbkastenwalze, verhindert. Eine gegenseitige Beeinflussung nebeneinander liegender Zonen findet nicht statt. Besonders für die in modernen Maschinenkonstruktionen verwendete Fernsteuerung der Farbzonen ist die genannte Reproduzierbarkeit des Farbfilmes unabdingbar.A color box of the type mentioned is known from DE-B 26 48 098, in which both support and metering areas are arranged on the individual zone-wide adjusting elements arranged next to one another in the axial direction of the ink box roller. The storage of each individual control element on individual pressure bars that are resiliently supported on the ink fountain base enables the ink film thickness to be adjusted at any time via the metering ranges. Fluctuations in the color film thickness, e.g. prevented by non-circular running of the ink fountain roller. There is no mutual interference between adjacent zones. The reproducibility of the ink film mentioned is indispensable especially for the remote control of the ink zones used in modern machine designs.

Da indessen die Stellelemente sowohl mit den Stütz- als auch den Dosierflächen versehen werden müssen, ist eine sehr sorgfältige Bearbeitung derselben erforderlich. Ferner müssen alle Stellelemente der Farbdosiereinrichtung einzeln an den Farbkasten montiert werden, was einen beträchtlichen Montage- und Justieraufwand der Farbdosiereinrichtung ergibt.However, since the control elements must be provided with both the support and the metering surfaces, very careful processing of the same is required. Furthermore, all control elements of the ink metering device must be mounted individually on the ink fountain, which results in a considerable assembly and adjustment effort for the ink metering device.

Der Erfindung liegt demzufolge die Aufgabe zugrunde, unter Beibehaltung der bezüglich der Reproduzierbarkeit und der zonalen Einstellmöglichkeit des Farbfilmes sehr wesentliche Vorteile einer Vorrichtung gemäss DE-B 26 48 098, eine Farbdosiereinrichtung in einem Farbkasten für Offset-oder Hochdruckmaschinen zu schaffen, die aufgrund ihrer konstruktiven Gestaltung eine kompakte, vorjustierbare Baueinheit bildet, mit welcher der fertigungstechnische Aufwand gemindert und sowohl die Montage- als auch die Justierarbeiten der Farbdosiereinrichtung erleichtert werden.The invention is therefore based on the object, while maintaining the reproducibility and the zonal adjustment of the color film very essential advantages of a device according to DE-B 26 48 098, to create an ink metering device in an ink fountain for offset or high-pressure machines, which due to its constructive Design forms a compact, pre-adjustable unit, with which the manufacturing outlay is reduced and both the assembly and the adjustment work of the ink metering device are facilitated.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass als elastische Lagerung eine einzige, sich über die ganze Länge der Farbkastenwalze erstreckende, biegeelastisch ausgebildete Stützleiste vorgesehen ist, die mit den Stützbereichen in Form von starren, von der Stützleiste abstehenden Stützstegen versehen ist, zwischen denen die durch die Stellmittel gegenüber der Stützleiste verstellbaren Dosierelemente aufgenommen sind.This object is achieved in that a single, extending over the entire length of the ink fountain roller, elastically designed support bar is provided as an elastic bearing, which is provided with the support areas in the form of rigid, projecting from the support bar support webs, between which the the adjusting means are adjustable dosing elements relative to the support bar.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass die Farbdosiereinrichtung mit den Dosierelementen in der durchgehenden Stützleiste zusammen mit den Stellmitteln als fertig montierte und gegebenenfalls vorjustierte Baueinheit auf den Farbkasten aufgesetzt werden kann, da die Möglichkeit gegeben ist, eine Justierung bzw. Nullpunkteinstellung aller Dosierelemente, z.B. auf einem entsprechenden Prüfstand oder einer ähnlichen Vorrichtung, bereits vor dem Einbau in den Farbkasten vorzunehmen. Weiterhin wird die Herstellung der Dosierelemente vereinfacht, da die Stützbereiche jetzt durch die biegeelastische Stützleiste mit gebildet werden. Ferner wird auf der Farbkastenwalze entstandene farbfreie Bereich sehr eingeschränkt. da im Mittel für jedes Dosierelement lediglich ein einziger schmaler Stützsteg erforderlich ist, wodurch die Verreibung der farbfreien Streifen erleichtert wird.The advantages achieved by the invention are essentially to be seen in the fact that the ink metering device with the metering elements in the continuous support bar together with the adjusting means can be placed on the ink fountain as a fully assembled and optionally pre-adjusted unit, since there is the possibility of an adjustment or Zero adjustment of all dosing elements, e.g. on an appropriate test bench or similar device, before installing it in the ink fountain. Furthermore, the production of the dosing elements is simplified since the support areas are now also formed by the flexible support strip. Furthermore, the ink-free area created on the ink fountain roller is very limited. since on average only a single narrow support web is required for each dosing element, which facilitates the rubbing of the color-free strips.

Durch entsprechende Wahl bzw. Kombination der Steifigkeit des elastischen Bereiches der Leiste und der Härte der Federn, die für das ständige Anliegen der Stützleiste über die Stützstege an der Farbkastenwalze sorgen, wird die Wirksamkeit der erfindungsgemässen Vorrichtung bestimmt.The effectiveness of the device according to the invention is determined by an appropriate choice or combination of the rigidity of the elastic area of the bar and the hardness of the springs, which ensure that the support bar is in constant contact with the inking roller over the support webs.

Um eine Verschmutzung der Farbdosiereinrichtung zu verhindern, ist diese von einer elastischen Folie überdeckt, über die die Stützbereiche ständig an der Farbkastenwalze anliegen. In den Dosierbereichen kann sich die Folie deformieren, um hier den gewünschten Farbdurchtritt zu ermöglichen.In order to prevent contamination of the ink metering device, this is covered by an elastic film, via which the support areas are constantly in contact with the ink fountain roller. The film can deform in the metering areas to allow the desired passage of color.

In einer vorteilhaften Ausgestaltung der Erfindung sind die Dosierelemente als Flachstücke ausgebildet und tangential zur Farbkastenwalze verschiebbar.In an advantageous embodiment of the invention, the metering elements are designed as flat pieces and can be displaced tangentially to the ink fountain roller.

Eine weitere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass den Dosierelementen Federn und Elektromagnete als Stellmittel zugeordnet sind, die diese während der Farbzufuhr fortdauernd impulsförmig an die Farbkastenwalze anstellen und einen bestimmten Spalt abheben, wobei Impulsfrequenz und Hubzeit einstellbar sind.A further embodiment of the invention is characterized in that springs and electromagnets are assigned to the dosing elements as adjusting means, which continuously place them in pulsed form on the ink fountain roller during the ink supply and lift a certain gap, pulse frequency and stroke time being adjustable.

Die genannten Ausgestaltungen der Erfindung sind im folgenden anhand von Zeichnungen näher beschrieben. Es zeigt:

  • Fig. 1 einen Querschnitt durch einen Farbkasten mit als Flachstücke ausgebildeten Dosierelementen,
  • Fig. 2 einen Teilquerschnitt der Farbdosiereinrichtung in Fig. 1,
  • Fig. 3 eine Draufsicht, die die Anordnung der Stellglieder zeigt,
  • Fig. 4 einen Querschnitt durch einen Farbkasten mit magnetisch betätigten Dosierelementen,
  • Fig. 5 einen Teilquerschnitt der Farbdosiereinrichtung in Fig. 4.
The embodiments of the invention mentioned are described in more detail below with reference to drawings. It shows:
  • 1 shows a cross section through an ink fountain with metering elements designed as flat pieces,
  • 2 shows a partial cross section of the ink metering device in FIG. 1,
  • 3 is a plan view showing the arrangement of the actuators,
  • 4 shows a cross section through an ink fountain with magnetically operated metering elements,
  • 5 shows a partial cross section of the ink metering device in FIG. 4.

Der in Figur 1 dargestellte Farbkasten 1 mit der daran befestigten Farbdosiereinrichtung 2 ist drehbar an einem Gelenk 3 gelagert und von der Farbkastenwalze 4 abschwenkbar. Die Farbdosiereinrichtung 2, die im wesentlichen aus der elastischen Stützleiste 5, den als Flachstücken ausgebildeten Dosierelementen 6 und den Stellschrauben 7 besteht, ist im oberen Bereich des Farbkastens 1 an diesem mittels Schraubverbindungen 8 befestigt und liegt auf der Bodenplatte 9 des Farbkastens 1 auf. Im Bereich der Dosierkante 10 wird die elastische Stützleiste 5 über die Stützstege 11 an die Farbkastenwalze 4 durch entsprechende Federn 12 angedrückt. Zwischen den Stützstegen 11 sind die als Flachstücke ausgebildeten Dosierelemente 6 eingepasst. Sie liegen dabei auf den sich zwischen den Stützstegen befindenden elastischen Bereichen 13 der Stützleiste 5 auf, die so elastisch ausgebildet sind, dass eine gegenseitige Beeinflussung benachbarter Stützstege 11 nahezu ausgeschlossen wird. Die gesamte Farbdosiereinrichtung 2 ist von einer elastischen Folie 14 überdeckt. An einer Seite dieser Folie 14 sind über die gesamte Länge in gewissen Abständen Löcher 15 eingestanzt. Weiterhin sind an entsprechender Stelle im oberen Bereich der Stützstege 11 kleine Stifte 16 vorgesehen, in welche dann die elastische Folie 14 eingehängt wird.The ink fountain 1 shown in FIG. 1 with the ink metering device 2 attached to it is rotatably mounted on a joint 3 and can be pivoted away from the ink fountain roller 4. The color metering device 2, which consists essentially of the elastic support bar 5, which is formed as flat pieces Deten metering elements 6 and the set screws 7 is attached to this in the upper region of the ink fountain 1 by means of screw connections 8 and rests on the base plate 9 of the ink fountain 1. In the area of the metering edge 10, the elastic support strip 5 is pressed onto the ink fountain roller 4 by means of corresponding springs 12 via the support webs 11. The metering elements 6, which are designed as flat pieces, are fitted between the support webs 11. They rest on the elastic areas 13 of the support strip 5 located between the support webs, which are designed to be elastic so that mutual interference between adjacent support webs 11 is almost impossible. The entire ink metering device 2 is covered by an elastic film 14. On one side of this film 14 holes 15 are punched at certain intervals over the entire length. Furthermore, small pins 16 are provided at a corresponding point in the upper region of the support webs, into which the elastic film 14 is then hung.

In dem keilförmigen Raum zwischen der Folie 14, der Farbkastenwalze 4 und den Seitenwänden 17 des Farbkastens befindet sich die Farbe 18. Durch jeweils zwei an der Unterseite jedes Dosierelementes 6 vorgesehene Halteschrauben 19, die mit ihrem unterhalb des Schraubenkopfes erweiterten und entsprechend dimensionierten Schaft 20 in Längsnuten 21 der elastischen Stützleiste 5 eingreifen, wird erreicht, dass die Dosierelemente 6 mit der elastischen Stützleiste 5 zwar verbunden sind, aber eine begrenzte Verschiebung der Dosierelemente 6 in Längsrichtung möglich ist. Für diese Verschiebung der Dosierelemente sind gemäss Figuren 1 und 3 Stellschrauben 7 vorgesehen. Im oberen Bereich der elastischen Stützleiste 5 in regelmässigen Abständen angebrachte Gewinde 22 dienen der Aufnahme besagter Stellschrauben 7. Am Schaft jeder Stellschraube 7 ist ein Ring 23 angebracht, der in eine Ausnehmung 24 an der Unterseite jedes Dosierelementes 6 eingreift und beim Betätigen der Stellschraube 7 die Längsverschiebung des Dosierelementes 6 bewirkt. Durch diese Längsverschiebung wird der Spalt zwischen Farbkastenwalze 4 und Dosierkante 10 verändert, wodurch sich eine zonenbreite Änderung der Farbschichtdicke ergibt. Durch eine Ausnehmung 25 auf der Oberseite jedes Dosierelementes 6 kann die Dosierkante 10 so gestaltet werden, dass sich an dieser Stelle kein Staudruck aufbauen kann.The ink 18 is located in the wedge-shaped space between the film 14, the ink fountain roller 4 and the side walls 17 of the ink fountain. Two holding screws 19 are provided on the underside of each metering element 6, which with their correspondingly dimensioned shaft 20 in underneath the screw head If longitudinal grooves 21 of the elastic support bar 5 engage, it is achieved that the metering elements 6 are connected to the elastic support bar 5, but a limited displacement of the metering elements 6 in the longitudinal direction is possible. For this displacement of the dosing elements, set screws 7 are provided according to FIGS. 1 and 3. In the upper region of the elastic support bar 5, threads 22 are provided at regular intervals to accommodate said set screws 7. A ring 23 is attached to the shaft of each set screw 7, which engages in a recess 24 on the underside of each metering element 6 and when the set screw 7 is actuated, the Longitudinal displacement of the metering element 6 causes. This longitudinal displacement changes the gap between ink fountain roller 4 and metering edge 10, which results in a zone-wide change in the ink layer thickness. Through a recess 25 on the top of each metering element 6, the metering edge 10 can be designed in such a way that no dynamic pressure can build up at this point.

Als Modifikation dieser Ausführungsform wäre es auch durchaus denkbar, die Gewinde 22 zur Aufnahme der Stellschrauben 7 nicht in der elastischen Stützleiste 5, sondern im oberen Bereich des Farbkastens 1 anzubringen. Dies ginge zwar auf Kosten der Kompaktheit der Farbdosiereinrichtung 2, würde aber gleichzeitig eine elastischere Ausbildung der elastischen Stützleiste 5 ermöglichen.As a modification of this embodiment, it would also be quite conceivable to attach the threads 22 for receiving the set screws 7 not in the elastic support strip 5, but in the upper region of the ink fountain 1. Although this would be at the expense of the compactness of the ink metering device 2, it would at the same time allow the elastic support strip 5 to be made more elastic.

Auch in der Ausführungsform gemäss Figuren 4 und 5 ist die Farbdosiereinrichtung 26 als kompakte Baueinheit auf den Farbkasten 1 aufsetzbar und wie bei der Ausführung nach den Figuren 1 bis 3, an diesem zu befestigen. Dies geschieht auch hier wieder im oberen Bereich des Farbkastens 1, während im unteren Bereich durch entsprechende Federn 12 eine Anlage an der Farbkastenwalze 4 erfolgt. Im Bereich dieser federnden Anlage, wo die Dosierung der von der Farbkastenwalze 4 zu transportierenden Farbe 18 vorgenommen wird, sind im elastischen Bereich 13 der Stützleiste 27 Elektromagnete 28 an dieser befestigt. Die Elektromagnete 28, deren Anschlüsse nicht dargestellt sind, sind zusammen mit Federn 29 den Dosierelementen 30 als Stellmittel zugeordnet, um die Dosierelemente 30 fortdauernd impulsförmig an die Farbkastenwalze 4 anzustellen und einen bestimmten Spalt abzuheben, wobei Impulsfrequenz und Hubzeit einstellbar sind. Dieser Spalt entspricht dabei dem Abstand 31 zwischen Dosierelement 30 und Elektromagnet 28. Aufgrund der federnden Anlage der elastischen Stützleiste 27 mit den daran befestigten Elektromagneten 28 an der Farbkastenwalze 4 und der gleichzeitig federnden Anlage der Dosierelemente 30 ist dieser Abstand 31 auch bei unterschiedlichen Betriebsbedingungen jederzeit konstant und reproduzierbar. Die Schraubverbindung zwischen Dosierelement 30 und Stützleiste 27 wird durch zwischengeschaltete Distanzbüchsen 32 so ausgeführt, dass jedem Dosierelement 30 in vertikaler Richtung die notwendige Freiheit gegeben wird, um die Stellbewegungen ausführen zu können. Die Dosierkante 33 ist auch hier wiederum so ausgebildet, dass sich kein Staudruck aufbauen kann. Um eine Verschmutzung der Farbdosiereinrichtung 26 zu verhindern, ist diese von einer elastischen Folie 34 abgedeckt, die im oberen Bereich an den Dosierelementen 30 befestigt ist.Also in the embodiment according to FIGS. 4 and 5, the ink metering device 26 can be placed on the ink fountain 1 as a compact structural unit and, as in the embodiment according to FIGS. 1 to 3, fastened thereon. This also happens here again in the upper region of the ink fountain 1, while in the lower region a contact with the ink fountain roller 4 takes place by means of corresponding springs 12. In the area of this resilient system, where the dosing of the ink 18 to be transported by the ink fountain roller 4 is carried out, in the elastic region 13 of the support bar 27 electromagnets 28 are fastened to the latter. The electromagnets 28, the connections of which are not shown, are assigned together with springs 29 to the metering elements 30 as actuating means in order to continuously position the metering elements 30 in pulsed fashion against the ink fountain roller 4 and to lift a certain gap, the pulse frequency and stroke time being adjustable. This gap corresponds to the distance 31 between the metering element 30 and the electromagnet 28. Because of the resilient contact of the elastic support strip 27 with the electromagnets 28 attached to it on the ink fountain roller 4 and the simultaneously resilient contact of the metering elements 30, this distance 31 is constant at all times even under different operating conditions and reproducible. The screw connection between the metering element 30 and the support bar 27 is carried out by interposed spacers 32 so that each metering element 30 is given the necessary freedom in the vertical direction to be able to carry out the adjusting movements. The metering edge 33 is again designed so that no back pressure can build up. In order to prevent contamination of the ink metering device 26, it is covered by an elastic film 34 which is attached to the metering elements 30 in the upper region.

Claims (4)

1. Ink metering device in an ink duct for offset or letterpress printing presses with metering areas and support areas juxtaposed in the axial direction of the ink duct roller whereby the metering areas are formed by flexibly mounted metering elements which can be set to zonally different inking gap thicknesses so that the support areas, under spring pressure, are thus constantly directly or indirectly in contact with the ink duct roller whereby actuators are provided for adjusting the metering elements, wherein the flexible mounting is in the form of a single flexible support strip (5, 27) which extends over the entire length of the ink duct roller (4) and which is provided with the support areas in the form of rigid support webs (11) which project from the support strip, whereby accomodated between said support webs are the metering elements (6, 30) which can be adjusted with respect to the support strip (5, 27) by means of the actuators (7, 28, 29).
2. ink metering device according to Claim 1, wherein support strip (5, 27) and metering elements (6, 30) are covered by an elastic film (14, 34).
3. Ink metering device according to claims 1 and 2, wherein the metering elements (6) are in the form of flat pieces and are displaceable tangentially with respect to the ink duct roller (4) whereby the connection between metering elements (6) and support strip (5) is by means of retaining screws (19) which permit merely a relative motion of the metering elements (6) in the longitudinal direction whereby the adjusting screws (7) each engage threads (22) which are provided in the upper region of the flexible support strip (5) whereby the elastic film (14) which is used to protect the ink metering device (2) is hooked into small pins (16) which are provided in the upper region of the support webs (11).
4. Ink metering device according to Claims 1 and 2, wherein the metering elements (30) on the support strip (27) are non-displaceable tangentially with respect to the ink duct roller (4) but are movable perpendicularly with respect to the latter whereby the metering elements (30) which can be pressed against the ink duct roller (4) by means of springs (29) disposed between the metering elements (30) and the flexible support strip (27) are assigned electromagnets (28) as actuators which are mounted on the support strip (27) and which during the feeding of the ink lift the metering elements (30) off the ink duct roller (4) by a certain gap width (31) or bring the metering elements (30) back into contact with the ink duct roller (4), this taking place in a continuous pulse-like manner, whereby the pulse frequency and lift time are adjustable whereby the elastic film (34) used to protect the ink metering device (2) is mounted in the upper region of the metering elements (30) on the latter.
EP81100604A 1980-05-16 1981-01-28 Device for colour dosage in a colour box for offset or high pressure printing machines Expired EP0040287B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3018784 1980-05-16
DE3018784A DE3018784C2 (en) 1980-05-16 1980-05-16 Ink metering device in an ink box for offset or letterpress machines

Publications (2)

Publication Number Publication Date
EP0040287A1 EP0040287A1 (en) 1981-11-25
EP0040287B1 true EP0040287B1 (en) 1983-09-21

Family

ID=6102614

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Application Number Title Priority Date Filing Date
EP81100604A Expired EP0040287B1 (en) 1980-05-16 1981-01-28 Device for colour dosage in a colour box for offset or high pressure printing machines

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US (1) US4453467A (en)
EP (1) EP0040287B1 (en)
JP (1) JPS578159A (en)
DE (1) DE3018784C2 (en)
IT (1) IT1135799B (en)

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DE3308066C1 (en) * 1983-03-08 1984-09-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Ink metering device for an ink fountain roller
DE3311113C1 (en) * 1983-03-26 1988-05-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Dosing elements in color boxes of offset printing machines
DE3324952C1 (en) * 1983-07-11 1985-02-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Ink metering device for a printing machine
DE3538256A1 (en) * 1985-10-28 1987-04-30 Heidelberger Druckmasch Ag INKBOX FOR OFFSET OR HIGH PRINTING MACHINES
DE3934986A1 (en) * 1989-10-20 1991-04-25 Jagenberg Ag Doctor blade adjustment - has setting motor with selective coupling to adjustment units for local and automatic setting while working
DE9004747U1 (en) * 1990-04-26 1990-06-28 MAN Roland Druckmaschinen AG, 6050 Offenbach Colorimeter arrangement
GB2332879B (en) 1996-09-30 2001-05-23 Accel Graphics Systems Inc Method and apparatus for maintaining ink level in ink fountain of printing press
JP4818645B2 (en) * 2005-05-31 2011-11-16 日本ケーブル株式会社 Wind monitoring device for cable carriage
CN107856407B (en) * 2017-11-06 2019-05-14 新华生印刷(深圳)有限公司 A kind of retroussage machine intelligent ink cartridge storehouse

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Also Published As

Publication number Publication date
JPS578159A (en) 1982-01-16
US4453467A (en) 1984-06-12
IT1135799B (en) 1986-08-27
DE3018784C2 (en) 1982-12-16
IT8121715A0 (en) 1981-05-15
EP0040287A1 (en) 1981-11-25
DE3018784A1 (en) 1981-11-26
JPH0242667B2 (en) 1990-09-25

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