EP0453855B1 - Preparation of the inking unit of a printing machine when changing the printing order - Google Patents

Preparation of the inking unit of a printing machine when changing the printing order Download PDF

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Publication number
EP0453855B1
EP0453855B1 EP91105542A EP91105542A EP0453855B1 EP 0453855 B1 EP0453855 B1 EP 0453855B1 EP 91105542 A EP91105542 A EP 91105542A EP 91105542 A EP91105542 A EP 91105542A EP 0453855 B1 EP0453855 B1 EP 0453855B1
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EP
European Patent Office
Prior art keywords
printing
inking
ink
unit
inking unit
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EP91105542A
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German (de)
French (fr)
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EP0453855A1 (en
Inventor
Bernd Müller
Anton Rodi
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0453855A1 publication Critical patent/EP0453855A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F35/00Cleaning arrangements or devices
    • B41F35/06Cleaning arrangements or devices for offset cylinders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices

Definitions

  • the invention relates to a method for eliminating and rebuilding a color profile of an inking unit of an offset rotary printing press having a printing form.
  • a printing unit for rotary printing presses which has at least two ink-guiding cylinders, such as plate cylinders and blanket cylinders.
  • a color-reducing unit that can be switched on or off is assigned to at least one of the ink-guiding cylinders in order to set a print-ready state.
  • This ink reduction unit takes over the function of the substrate, that is, the ink and dampening solution film supplied by the inking and dampening units is corresponding to the ink-carrying ink Cylinder transferred and taken from there by the color reduction unit. This enables the color profile required for the production run to be set without the printing material having to be printed on. Waste can be avoided as far as possible.
  • the invention is therefore based on the object of specifying a method of the type mentioned at the outset in which a color profile change can be carried out in a simple manner and at short notice, so that the makeready times are shortened when a print job is changed. Furthermore, the print-ready condition should be adopted as quickly as possible, so that waste is largely avoided.
  • this object is achieved in that, in order to eliminate the previous ink and to prepare for the construction of a new color profile, the printing plate is colored over the entire surface. This destroys or equalizes the existing color profile.
  • the full-surface inking of the printing form has the result that a corresponding ink distribution is established right into the inking unit, that is to say that there too, an equalization takes place over the longitudinal extent of the inking unit rollers Color distribution result. This is a good prerequisite for building up the new color profile required for the further print job on the "basic color layer thickness" thus formed. This eliminates the need to remove the entire ink volume from the inking unit, so that makeready times are significantly reduced when changing jobs.
  • the new color profile can be built up much more quickly on the leveled base color layer than in a washed, color-free inking unit.
  • the color profile presetting of the metering elements in the region of the ink fountain of the inking unit can either continue to maintain the old presetting or the printer already makes the new presetting there. Alternatively, however, it is preferably also possible for a neutral setting to take place there. If the color profile presetting corresponding to the new print job is already carried out when the printing plate is inked, the subject-specific color profile corresponding to the production status can be achieved all the more quickly, so that waste is largely avoided.
  • the dampening unit is preferably controlled in such a way that the printing form receives no or only a reduced amount of dampening solution.
  • the absence or the insufficient amount of dampening solution causes color-free areas of the printing form to take on color even during production, as a result of which the full-surface coloring according to the invention is established.
  • a blanket washing device assigned to a blanket cylinder which washes the printing form by the blanket cylinder assuming a contact position with the printing form.
  • the rubber blanket washer not only washes the rubber blanket, but through it The position of the blanket cylinder in relation to the printing form, that is to say the printing plate clamped on a plate cylinder, the washing liquid is also fed to the printing plate.
  • the machine design does not allow the sole positioning of the blanket cylinder and plate cylinder, but it must be expected that an impression cylinder carrying the printing material (for example paper) will at least approach the blanket cylinder to such an extent that the washing liquid is also to be feared there, one can be feared Adjust the pressure provided per se for a paper thickness compensation preferably in such a way that there is a sufficient distance between the impression cylinder and the blanket cylinder in order to avoid the transfer of washing liquid.
  • an impression cylinder carrying the printing material for example paper
  • the inking unit preferably has at least one inking roller which interacts with the printing form. This must therefore be shifted to a distance from the printing form during the washing process.
  • the invention further relates to a method for rebuilding a color profile of an inking unit of a rotary printing press having a printing form, in particular an offset printing press, preferably for carrying out a new printing job, the printing form to be used for the new printing job being inked over the entire surface and the dampening solution supply subsequently being set in such a way that that color-free areas of the subject become color-free when printed.
  • FIG. 1 shows a roller diagram of an offset printing machine, not shown in detail.
  • the roller diagram has an inking unit 1 and a dampening unit 2.
  • the inking unit 1 is provided with an ink fountain 3, the (not shown) metering element for Setting zonal color column has. From the ink fountain 3, an ink fountain pen 4 doses ink during operation.
  • a jack roller 5 interacts with the ink duct 4 and with a driven distribution cylinder 6.
  • the dampening unit 2 has a dampening solution box 26 filled with dampening solution 27, an immersion roller 28 with a partial section of its circumference being immersed in the dampening solution 27.
  • the dipping roller 28 interacts with a metering roller 29.
  • a rubber roller 30 is also provided.
  • Inking and dampening units 1, 2 also have further, driven cylinders 7, 8, 9 and 10. Furthermore, six rider and transfer rollers 11 to 16 and nine rubber rollers 17 to 25 are provided. If necessary, the inking and dampening units 1, 2 can be connected to one another via an intermediate roller (not shown).
  • both ink and fountain solution 27 are fed to a printing form 32.
  • the printing form 32 is a printing plate (not shown) mounted on a plate cylinder 33.
  • the transfer of ink and dampening solution 27 from the inking unit 1 or dampening unit 2 to the printing plate is carried out by the rubber rollers 18, 20, 23, 25 and 30. These are therefore also referred to as inking rollers 34 and the rubber roller 30 transferring the dampening solution as the dampening roller 35.
  • the inking rollers 34 and the dampening roller 35 can be placed in a contact position or a spacing position from the printing form 32 relocate.
  • the inking rollers 34 assume their contact position and the dampening roller 35 their spaced positions.
  • the printing plate 32 is first inked over the entire surface, that is to say the printing plate previously used and clamped on the plate cylinder 33.
  • This is preferably achieved by the fact that the spacing of the dampening roller 35 to the plate cylinder 33 and in the absence of a connection between dampening unit 2 and inking unit 1 (if an intermediate roller is used, this would have to be moved to a separation position), no dampening solution 27 reaches the printing form 32.
  • the full-surface coloring of the printing form 32 has repercussions on the color profile of the inking unit 1. There, the previous color profile originating from the print job carried out is destroyed, in particular equalized. This leads to a "basic color layer thickness", which the Forms the basis for building a new color profile for the next print job.
  • the old printing plate which is colored over the entire surface, should first be cleaned.
  • the inking rollers 34 are shifted into a spacing position from the printing form 32.
  • the dampening application roller 35 remains in its spaced position from the plate cylinder 33.
  • a blanket cylinder 36 which is always present in an offset printing press is brought into a contact position with the plate cylinder 33.
  • a blanket washing device 37 is assigned to the blanket cylinder 36. This has two washing rollers 38 running on the outer surface of the blanket cylinder 36 and a common roller 39 connecting the washing rollers 38.
  • a transfer roller 40 is provided which is in contact with the upper washing roller 38 and to which washing liquid can be supplied by means of a spray device 41.
  • a doctor device 42 is associated with the roller 39, under which a collecting trough 43 is arranged.
  • the washing liquid supplied by the spraying device is transferred to the blanket of the blanket cylinder 36 by means of the transfer roller 40 and the washing rollers 38.
  • the blanket cylinder 36 in turn transfers a certain proportion of the washing liquid to the plate cylinder 33, that is to say to the printing form 32, so that the ink covering forming the full-surface inking is loosened and removed. Color residues and the like reach the roller in this way 39 and are stripped there by the doctor device 42.
  • the printing plate previously used is cleaned, it is removed from the offset printing machine.
  • the printing plate to be used for the new printing job can then be clamped onto the plate cylinder 33.
  • the old printing plate is first removed and then the new printing plate is clamped onto the plate cylinder 33. Then the full-surface inking of the new printing plate takes place with the corresponding color profile setting. The printing plate is then washed as described. Finally you can start with the actual printing.
  • the new, full-surface inked printing plate to "run free" by supplying fountain solution, that is to say the full-surface inking is removed by supplying dampening solution to the areas which are actually free of ink. No washing process (as mentioned above) is then required.
  • a plate cylinder washing device can also be used.

Abstract

The invention relates to a rotary printing machine, in particular an offset printing machine, the printing unit of which has a forme, a dampening unit and an inking unit with adjusted inking profile. For a rapid inking profile change, it is proposed, for the removal of the previous and for the preparation of the design of a new inking profile, to carry out with the inking unit (1) a full-surface inking of the forme (32). <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Beseitigen und Neuaufbau eines Farbprofils eines Farbwerks einer eine Druckform aufweisenden Offset-Rotationsdruckmaschine.The invention relates to a method for eliminating and rebuilding a color profile of an inking unit of an offset rotary printing press having a printing form.

Bei Druckmaschinen der eingangs genannten Art ist es für den Fortdruckzustand erforderlich, im Farbwerk ein dem Sujet entsprechendes Farbprofil aufzubauen (DE-A 37 07 695). Liegt das fortdruckgerechte Farbprofil bei Druckbeginn noch nicht vor, so wird nach dem Andruck zunächst eine größere Menge Makulatur erzeugt, bis sich das erforderliche Farbprofil und damit auch ein stabiles Farb-/Feuchtmittelgleichgewicht eingestellt hat. Zur Vermeidung beziehungsweise zur wesentlichen Reduzierung von Makulatur ist es daher erforderlich, schon beim Druckbeginn das entsprechende Farbprofil zur Verfügung zu stellen. Dies gilt vor allem dann, wenn eine neue Druckform mit einem gegenüber dem vorherigen Druckauftrag abweichenden Sujet verwendet wird. Ferner sollte zur Vermeidung von Makulatur auch nach längeren Druckunterbrechungen (also beim erneuten Einsatz einer bereits verwendeten Druckform) das erforderliche Farbprofil beim Andruck im Farbwerk eingestellt sein.In printing presses of the type mentioned in the introduction, it is necessary for the production status to build up a color profile corresponding to the subject in the inking unit (DE-A 37 07 695). If the color profile is still available at the start of printing, a larger amount of waste is initially generated after the printing process until the required color profile and thus a stable ink / fountain solution balance has been established. To avoid or substantially reduce waste, it is therefore necessary to provide the appropriate color profile at the start of printing. This is especially true if a new printing form with a subject that differs from the previous print order is used. Furthermore, in order to avoid waste, even after long printing interruptions (i.e. when a printing form that has already been used again), the required color profile should be set when printing in the inking unit.

Aus der DE-OS 38 00 570 ist ein Druckwerk für Rotationsdruckmaschinen bekannt, das mindestens zwei farbführende Zylinder, wie zum Beispiel Plattenzylinder und Gummituchzylinder, aufweist. Für die Einstellung eines fortdruckgerechten Zustands ist mindestens einem der farbführenden Zylinder ein an- beziehungsweise abstellbares Farbreduzierwerk zugeordnet. Dieses Farbreduzierwerk übernimmt die Funktion des Bedruckstoffs, das heißt, der vom Farb- und vom Feuchtwerk zugeführte Farb- und Feuchtmittelfilm wird sujetentsprechend auf den farbführenden Zylinder übertragen und von dort vom Farbreduzierwerk übernommen. Dies ermöglicht die Einstellung des für den Fortdruck erforderlichen Farbprofils, ohne daß ein Bedrucken des Bedruckstoffs erforderlich ist. Makulatur kann dadurch weitestgehend vermieden werden.From DE-OS 38 00 570 a printing unit for rotary printing presses is known which has at least two ink-guiding cylinders, such as plate cylinders and blanket cylinders. A color-reducing unit that can be switched on or off is assigned to at least one of the ink-guiding cylinders in order to set a print-ready state. This ink reduction unit takes over the function of the substrate, that is, the ink and dampening solution film supplied by the inking and dampening units is corresponding to the ink-carrying ink Cylinder transferred and taken from there by the color reduction unit. This enables the color profile required for the production run to be set without the printing material having to be printed on. Waste can be avoided as far as possible.

Ferner ist es bekannt, bei einem Druckauftragswechsel, also dem Einsatz einer neuen, gegenüber der bisherigen Druckform im Sujet veränderten Druckplatte zunächst das Farbwerk zu reinigen, so daß das dort für den bisherigen Druck vorhandene Farbprofil durch Entfernen der Farbe beseitigt wird. Das Entfernen des gesamten Farbvolumens aus dem Farbwerk, das insbesondere durch Abrakeln und anschließendem Waschen erfolgt, ist sehr aufwendig und daher zeitraubend. Ferner ist es für einen weiteren Druckbeginn erforderlich, das Farbprofil innerhalb des Farbwerks von Grund auf neu aufzubauen, das heißt, es muß zunächst ein entsprechendes Farbvolumen neu eingebracht werden.Furthermore, it is known to first clean the inking unit when changing a print job, that is to say when using a new printing plate that has been modified in the subject compared to the previous printing form, so that the color profile present there for the previous printing is eliminated by removing the ink. The removal of the entire ink volume from the inking unit, which is done in particular by doctoring and subsequent washing, is very complex and therefore time-consuming. Furthermore, for a further start of printing, it is necessary to build up the color profile from scratch within the inking unit, which means that a corresponding volume of color must first be introduced.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art anzugeben, bei der sich auf einfache Weise und kurzfristig ein Farbprofilwechsel vornehmen läßt, so daß sich die Rüstzeiten bei einem Druckauftragswechsel verkürzen. Ferner soll bei einem Andruck möglichst schnell der fortdruckgerechte Zustand eingenommen werden, so daß Makulatur weitestgehend vermieden wird.The invention is therefore based on the object of specifying a method of the type mentioned at the outset in which a color profile change can be carried out in a simple manner and at short notice, so that the makeready times are shortened when a print job is changed. Furthermore, the print-ready condition should be adopted as quickly as possible, so that waste is largely avoided.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zur Beseitigung des bisherigen und zur Vorbereitung des Aufbaus eines neuen Farbprofils mit dem Farbwerk eine vollflächige Einfärbung der Druckform erfolgt. Dadurch wird das zuvor bestehende Farbprofil zerstört beziehungsweise egalisiert. Das vollflächige Einfärben der Druckform hat zur Folge, daß sich bis in das Farbwerk hinein eine entsprechende Farbverteilung einstellt, das heißt, auch dort wird sich über die Längserstreckung der Farbwerkwalzen eine egalisierte Farbverteilung ergeben. Dies ist eine gute Voraussetzung, um auf der so gebildeten "Grundfarbschichtdicke" das neue, für den weiteren Druckauftrag erforderliche Farbprofil aufzubauen. Damit entfällt die Entfernung des gesamten Farbvolumens aus dem Farbwerk, so daß sich die Rüstzeiten bei einem Auftragswechsel erheblich verkürzen. Im übrigen läßt sich auf der egalisierten Grundfarbschicht wesentlich schneller das neue Farbprofil aufbauen, als bei einem gewaschenen, farbfreien Farbwerk. Bei dem erfindungsgemäßen vollflächigen Einfärben der Druckform kann die Farbprofilvoreinstellung der Dosierelemente im Bereich des Farbkastens des Farbwerks entweder die alte Voreinstellung weiterhin beibehalten oder der Drucker nimmt dort schon die neue Voreinstellung vor. Vorzugsweise ist es alternativ jedoch auch möglich, daß dort eine neutrale Einstellung erfolgt. Wird bereits die dem neuen Druckauftrag entsprechende Farbprofilvoreinstellung beim Einfärben der Druckplatte vorgenommen, so läßt sich umso schneller eine dem Fortdruckzustand entsprechende, sujetabgestimmte Farbprofilierung erzielen, so daß Makulatur weitestgehend vermieden wird.According to the invention, this object is achieved in that, in order to eliminate the previous ink and to prepare for the construction of a new color profile, the printing plate is colored over the entire surface. This destroys or equalizes the existing color profile. The full-surface inking of the printing form has the result that a corresponding ink distribution is established right into the inking unit, that is to say that there too, an equalization takes place over the longitudinal extent of the inking unit rollers Color distribution result. This is a good prerequisite for building up the new color profile required for the further print job on the "basic color layer thickness" thus formed. This eliminates the need to remove the entire ink volume from the inking unit, so that makeready times are significantly reduced when changing jobs. In addition, the new color profile can be built up much more quickly on the leveled base color layer than in a washed, color-free inking unit. In the full-surface inking of the printing form according to the invention, the color profile presetting of the metering elements in the region of the ink fountain of the inking unit can either continue to maintain the old presetting or the printer already makes the new presetting there. Alternatively, however, it is preferably also possible for a neutral setting to take place there. If the color profile presetting corresponding to the new print job is already carried out when the printing plate is inked, the subject-specific color profile corresponding to the production status can be achieved all the more quickly, so that waste is largely avoided.

Bevorzugt wird zum vollflächigen Einfärben der Druckform das Feuchtwerk derart gesteuert, daß die Druckform keine oder nur eine verringerte Feuchtmittelmenge erhält. Das Fehlen oder das in der Menge nicht ausreichende Feuchtmittel bewirkt, daß auch im Fortdruck an sich farbfreie Bereiche der Druckform Farbe annehmen, wodurch sich die erfindungsgemäße vollflächige Einfärbung einstellt.For the full-surface inking of the printing form, the dampening unit is preferably controlled in such a way that the printing form receives no or only a reduced amount of dampening solution. The absence or the insufficient amount of dampening solution causes color-free areas of the printing form to take on color even during production, as a result of which the full-surface coloring according to the invention is established.

Um die vollflächig eingefärbte Druckform wieder von der Farbe zu befreien, ist eine einem Gummituchzylinder zugeordnete Gummituch-Wascheinrichtung vorgesehen, die die Druckform wäscht, indem der Gummituchzylinder zur Druckform eine Anlagestellung einnimmt. Die Gummituch-Wascheinrichtung wäscht also nicht nur das Gummituch, sondern durch die Anlagestellung des Gummituchzylinders zur Druckform, das heißt, zur auf einen Plattenzylinder aufgespannten Druckplatte, wird die Waschflüssigkeit auch der Druckplatte zugeführt. Sofern die Maschinenkonstruktion keine alleinige Anlagestellung von Gummituchzylinder und Plattenzylinder gestattet, sondern damit gerechnet werden muß, daß sich ein den Druckstoff (zum Beispiel Papier ) führender Gegendruckzylinder zumindest soweit dem Gummituchzylinder nähert, daß auch dort ein übertritt der Waschflüssigkeit zu befürchten ist, läßt sich eine an und für sich für einen Papierdickenausgleich vorgesehene Druckbeistellung vorzugsweise derart verstellen, daß ein hinreichender Abstand zwischen Gegendruckzylinder und Gummituchzylinder zur Vermeidung eines Waschflüssigkeitsübertritts vorliegt.In order to free the ink from the full-surface inked printing form, a blanket washing device assigned to a blanket cylinder is provided, which washes the printing form by the blanket cylinder assuming a contact position with the printing form. The rubber blanket washer not only washes the rubber blanket, but through it The position of the blanket cylinder in relation to the printing form, that is to say the printing plate clamped on a plate cylinder, the washing liquid is also fed to the printing plate. If the machine design does not allow the sole positioning of the blanket cylinder and plate cylinder, but it must be expected that an impression cylinder carrying the printing material (for example paper) will at least approach the blanket cylinder to such an extent that the washing liquid is also to be feared there, one can be feared Adjust the pressure provided per se for a paper thickness compensation preferably in such a way that there is a sufficient distance between the impression cylinder and the blanket cylinder in order to avoid the transfer of washing liquid.

Damit das im Farbwerk aufgebaute, vergleichmäßigte Farbprofil durch die Waschflüssigkeit nicht zerstört wird, ist eine Trennung zwischen der Druckform und dem Farbwerk beim Waschvorgang vorzunehmen. Das Farbwerk weist vorzugsweise mindestens eine mit der Druckform zusammenwirkende Farbauftragwalze auf. Diese ist beim Waschvorgang daher in eine Abstandsstellung zur Druckform zu verlagern.So that the uniform color profile built up in the inking unit is not destroyed by the washing liquid, a separation must be made between the printing form and the inking unit during the washing process. The inking unit preferably has at least one inking roller which interacts with the printing form. This must therefore be shifted to a distance from the printing form during the washing process.

Die Erfindung betrifft ferner ein Verfahren zum Neuaufbau eines Farbprofils eines Farbwerks einer eine Druckform aufweisenden Rotationsdruckmaschine, insbesondere Offset-Druckmaschine, vorzugsweise zur Durchführung eines neuen Druckauftrags, wobei die für den neuen Druckauftrag zu verwendente Druckform vollflächig eingefärbt wird und anschließend die Feuchtmittelzufuhr derart eingestellt wird, daß im Fortdruckzustand farbfreie Bereiche des Sujets farbfrei werden.The invention further relates to a method for rebuilding a color profile of an inking unit of a rotary printing press having a printing form, in particular an offset printing press, preferably for carrying out a new printing job, the printing form to be used for the new printing job being inked over the entire surface and the dampening solution supply subsequently being set in such a way that that color-free areas of the subject become color-free when printed.

Die Zeichnung veranschaulicht die Erfindung anhand eines Ausführungsbeispiels und zwar zeigt:

Fig. 1
ein Walzenschema eines Farb- und Feuchtwerks einer Offset-Druckmaschine und
Fig. 2
das Walzenschema der Figur 1 mit einer an einem Gummituchzylinder angeordneten Gummituch-Wascheinrichtung.
The drawing illustrates the invention using an exemplary embodiment and shows:
Fig. 1
a roller diagram of an inking and dampening unit of an offset printing machine and
Fig. 2
the roller diagram of Figure 1 with a rubber blanket washer arranged on a blanket cylinder.

Die Figur 1 zeigt ein Walzenschema einer nicht näher dargestellten Offset-Druckmaschine. Das Walzenschema weist ein Farbwerk 1 und ein Feuchtwerk 2 auf. Das Farbwerk 1 ist mit einem Farbkasten 3 versehen, das (nicht dargestellte) Dosierelement zum Einstellen zonaler Farbspalte besitzt. Aus dem Farbkasten 3 entnimmt ein Farbduktor 4 während des Betriebs dosiert Farbe. Eine Heberwalze 5 wirkt mit dem Farbduktor 4 sowie mit einem angetriebenen Reibzylinder 6 zusammen. Das Feuchtwerk 2 weist einen mit Feuchtmittel 27 gefüllten Feuchtmittelkasten 26 auf, wobei in das Feuchtmittel 27 eine Tauchwalze 28 mit einem Teilabschnitt ihres Umfangs eintaucht. Die Tauchwalze 28 wirkt mit einer Dosierwalze 29 zusammen. Ferner ist eine Gummiwalze 30 vorgesehen. Farb- und Feuchtwerk 1,2 weisen ferner weitere, mit Antrieb versehene Reibzylinder 7,8,9 und 10 auf. Ferner sind sechs Reiter- und Übertragungswalzen 11 bis 16 und neun Gummiwalzen 17 bis 25 vorgesehen. Gegebenenfalls können Farb- und Feuchtwerk 1,2 über eine (nicht dargestellte) Zwischenwalze miteinander verbunden werden.FIG. 1 shows a roller diagram of an offset printing machine, not shown in detail. The roller diagram has an inking unit 1 and a dampening unit 2. The inking unit 1 is provided with an ink fountain 3, the (not shown) metering element for Setting zonal color column has. From the ink fountain 3, an ink fountain pen 4 doses ink during operation. A jack roller 5 interacts with the ink duct 4 and with a driven distribution cylinder 6. The dampening unit 2 has a dampening solution box 26 filled with dampening solution 27, an immersion roller 28 with a partial section of its circumference being immersed in the dampening solution 27. The dipping roller 28 interacts with a metering roller 29. A rubber roller 30 is also provided. Inking and dampening units 1, 2 also have further, driven cylinders 7, 8, 9 and 10. Furthermore, six rider and transfer rollers 11 to 16 and nine rubber rollers 17 to 25 are provided. If necessary, the inking and dampening units 1, 2 can be connected to one another via an intermediate roller (not shown).

Mittels der beschriebenen Walzenanordnung wird einer Druckform 32 sowohl Farbe als auch Feuchtmittel 27 zugeführt. Bei der Druckform 32 handelt es sich um eine auf einem Plattenzylinder 33 aufgespannte Druckplatte (nicht dargestellt). Die Übertragung von Farbe und Feuchtmittel 27 vom Farbwerk 1 beziehungsweise Feuchtwerk 2 zur Druckplatte wird von den Gummiwalzen 18,20,23,25 und 30 vorgenommen. Diese werden daher auch als Farbauftragwalzen 34 und die das Feuchtmittel übertragende Gummiwalze 30 als Feuchtauftragwalze 35 bezeichnet.By means of the roller arrangement described, both ink and fountain solution 27 are fed to a printing form 32. The printing form 32 is a printing plate (not shown) mounted on a plate cylinder 33. The transfer of ink and dampening solution 27 from the inking unit 1 or dampening unit 2 to the printing plate is carried out by the rubber rollers 18, 20, 23, 25 and 30. These are therefore also referred to as inking rollers 34 and the rubber roller 30 transferring the dampening solution as the dampening roller 35.

Mittels einer nicht dargestellten Steuereinrichtung lassen sich die Farbauftragwalzen 34 und die Feuchtauftragwalze 35 in eine Anlagestellung beziehungsweise eine Abstandsstellung zur Druckform 32 verlagern. In der Darstellung der Figur 1 nehmen die Farbauftragwalzen 34 ihre Anlagestellung und die Feuchtauftragwalze 35 ihre Abstandsstellung ein.By means of a control device (not shown), the inking rollers 34 and the dampening roller 35 can be placed in a contact position or a spacing position from the printing form 32 relocate. In the illustration in FIG. 1, the inking rollers 34 assume their contact position and the dampening roller 35 their spaced positions.

Es sei davon ausgegangen, daß ein mit der auf den Plattenzylinder 33 aufgespannten Druckplatte durchgeführter Druckauftrag beendet ist, das heißt, eine gewünschte Anzahl von Druckexemplaren ist fertiggestellt. Nunmehr soll ein Auftragswechsel erfolgen; es soll ein neuer Druck mit einer im Sujet unterschiedlichen Druckplatte durchgeführt werden.It is assumed that a print job carried out with the printing plate clamped on the plate cylinder 33 has ended, that is to say that a desired number of printed copies has been completed. An order change should now take place; A new print should be carried out with a different printing plate in the subject.

Um möglichst schnell im Farbwerk ein dem Fortdruckzustand des neuen Druckprozesses entsprechendes Farbprofil einstellen zu können, erfolgt zunächst erfindungsgemäß ein vollflächiges Einfärben der Druckform 32, das heißt, der bisher verwendeten, auf dem Plattenzylinder 33 aufgespannten Druckplatte. Dieses wird vorzugsweise dadurch erzielt, daß durch die Abstandsstellung der Feuchtauftragwalze 35 zum Plattenzylinder 33 und mangels einer Verbindung zwischen Feuchtwerk 2 und Farbwerk 1 (sofern eine Zwischenwalze eingesetzt ist, wäre diese in eine Trennstellung zu verlagern) kein Feuchtmittel 27 zur Druckform 32 gelangt. Damit nehmen im Fortdruckzustand an sich farbfreie Bereiche der Druckform 32 Farbe an (Tonen). Das vollflächige Einfärben der Druckform 32 hat Rückwirkungen auf das Farbprofil des Farbwerks 1. Dort wird das bisherige, vom durchgeführten Druckauftrag stammende Farbprofil zerstört, insbesondere egalisiert. Die führt zu einer "Grundfarbschichtdicke", die die Grundlage zum Aufbau eines neuen Farbprofils für den folgenden Druckauftrag bildet.In order to be able to set a color profile corresponding to the production status of the new printing process as quickly as possible in the inking unit, the printing plate 32 is first inked over the entire surface, that is to say the printing plate previously used and clamped on the plate cylinder 33. This is preferably achieved by the fact that the spacing of the dampening roller 35 to the plate cylinder 33 and in the absence of a connection between dampening unit 2 and inking unit 1 (if an intermediate roller is used, this would have to be moved to a separation position), no dampening solution 27 reaches the printing form 32. This means that in the printing condition, color-free areas of the printing form take on 32 color (toning). The full-surface coloring of the printing form 32 has repercussions on the color profile of the inking unit 1. There, the previous color profile originating from the print job carried out is destroyed, in particular equalized. This leads to a "basic color layer thickness", which the Forms the basis for building a new color profile for the next print job.

Bevor die neue Druckplatte auf den Plattenzylinder 33 aufgespannt wird, soll zunächst die alte, vollflächig eingefärbte Druckplatte gereinigt werden. Hierzu werden -gemäß Figur 2- die Farbauftragwalzen 34 in eine Abstandsstellung zur Druckform 32 verlagert. Die Feuchtauftragwalze 35 verbleibt in ihrer Abstandsstellung zum Plattenzylinder 33. Ein bei einer Offset-Druckmaschine stets vorhandener Gummituchzylinder 36 wird in eine Anlagestellung zum Plattenzylinder 33 gebracht. Dem Gummituchzylinder 36 ist eine Gummituch-Wascheinrichtung 37 zugeordnet. Diese weist zwei auf der Mantelfläche des Gummituchzylinders 36 ablaufende Waschwalzen 38 sowie eine die Waschwalzen 38 verbindende gemeinsame Walze 39 auf. Ferner ist eine Übertragungswalze 40 vorgesehen, die in Kontakt zur oberen Waschwalze 38 steht und der mittels einer Sprüheinrichtung 41 Waschflüssigkeit zuführbar ist. Der Walze 39 ist eine Rakeleinrichtung 42 zugeordnet, unter der eine Auffangwanne 43 angeordnet ist.Before the new printing plate is clamped onto the plate cylinder 33, the old printing plate, which is colored over the entire surface, should first be cleaned. For this purpose, according to FIG. 2-, the inking rollers 34 are shifted into a spacing position from the printing form 32. The dampening application roller 35 remains in its spaced position from the plate cylinder 33. A blanket cylinder 36 which is always present in an offset printing press is brought into a contact position with the plate cylinder 33. A blanket washing device 37 is assigned to the blanket cylinder 36. This has two washing rollers 38 running on the outer surface of the blanket cylinder 36 and a common roller 39 connecting the washing rollers 38. Furthermore, a transfer roller 40 is provided which is in contact with the upper washing roller 38 and to which washing liquid can be supplied by means of a spray device 41. A doctor device 42 is associated with the roller 39, under which a collecting trough 43 is arranged.

In der Waschstellung (Figur 2) wird die von der Sprüheinrichtung gelieferte Waschflüssigkeit mittels der Übertragungswalze 40 und der Waschwalzen 38 auf das Gummituch des Gummituchzylinders 36 übertragen. Der Gummituchzylinder 36 wiederum überträgt einen gewissen Anteil der Waschflüssigkeit zum Plattenzylinder 33, also auf die Druckform 32, so daß der die vollflächige Einfärbung bildende Farbbelag gelöst und abgetragen wird. Farbreste und dergleichen gelangen auf diese Weise bis zur Walze 39 und werden dort von der Rakeleinrichtung 42 abgestreift.In the washing position (FIG. 2), the washing liquid supplied by the spraying device is transferred to the blanket of the blanket cylinder 36 by means of the transfer roller 40 and the washing rollers 38. The blanket cylinder 36 in turn transfers a certain proportion of the washing liquid to the plate cylinder 33, that is to say to the printing form 32, so that the ink covering forming the full-surface inking is loosened and removed. Color residues and the like reach the roller in this way 39 and are stripped there by the doctor device 42.

Ist die bisher verwendete Druckplatte gesäubert, so wird diese aus der Offset-Druckmaschine ausgebaut. Die für den neuen Druckauftrag zu verwendende Druckplatte kann anschließend auf den Plattenzylinder 33 aufgespannt werden.If the printing plate previously used is cleaned, it is removed from the offset printing machine. The printing plate to be used for the new printing job can then be clamped onto the plate cylinder 33.

Zur Egalisierung des bisher vorliegenden Farbprofils des Farbwerks sowie für den Neuaufbau des für den neuen Druckauftrag erforderlichen Farbprofils ist es möglich, daß an den Dosierelementen des Farbkastens 3 die zonalen Farbspalte während des vollflächigen Einfärbevorgangs der Druckform 32 bereits in eine Neueinstellung gebracht werden, die dem Sujet der neuen, für den folgenden Druckauftrag zu verwendenden Druckplatte entspricht.To equalize the existing color profile of the inking unit and to rebuild the color profile required for the new print job, it is possible that the zonal color gaps on the metering elements of the ink fountain 3 are already brought into a new setting during the full-surface inking process of the printing form 32, which is the subject corresponds to the new printing plate to be used for the next print job.

Ferner ist es in Abweichung der bisherigen Ausführungen auch möglich, daß zunächst die alte Druckplatte ausgebaut und dann die neue Druckplatte auf den Plattenzylinder 33 aufgespannt wird. Dann erfolgt das vollflächige Einfärben der neuen Druckplatte mit entsprechender Farbprofileinstellung. Anschließend wird dann die Druckplatte -wie dargelegt- gewaschen. Schließlich kann mit dem eigentlichen Druck begonnen werden. Es ist jedoch auch möglich, daß die neue, vollflächig eingefärbte Druckplatte durch Zuführung von Feuchtwasser "freiläuft", das heißt, die vollflächige Einfärbung wird durch die Zufuhr von Feuchtmittel auf den an sich farbfreien Bereichen entfernt. Es ist dann kein Waschvorgang (wie vorstehend erwähnt) erforderlich.Furthermore, in deviation from the previous versions, it is also possible that the old printing plate is first removed and then the new printing plate is clamped onto the plate cylinder 33. Then the full-surface inking of the new printing plate takes place with the corresponding color profile setting. The printing plate is then washed as described. Finally you can start with the actual printing. However, it is also possible for the new, full-surface inked printing plate to "run free" by supplying fountain solution, that is to say the full-surface inking is removed by supplying dampening solution to the areas which are actually free of ink. No washing process (as mentioned above) is then required.

Alternativ zur Reinigung der Druckform mittels der Gummituch-Wascheinrichtung kann auch eine Plattenzylinder-Wascheinrichtung verwendet werden.As an alternative to cleaning the printing form by means of the blanket washing device, a plate cylinder washing device can also be used.

Claims (5)

  1. Method for removal and renewed setting-up of an ink profile of an inking unit (1) of an offset rotary printing machine having a printing forme (32), characterised in that inking of the printing forme (32) over the entire surface is undertaken by the inking unit (1) for the levelling of the previous ink profile and for preparing the setting-up of a new ink profile.
  2. Method according to Claim 1, characterised in that the inking of the printing forme (32) is effected without the supply of damping solution from a damping unit (2).
  3. Method according to one of the preceding claims, characterised in that the printing forme (32) is washed after the levelling of the previous ink profile.
  4. Method according to one of the preceding claims, characterised in that the washing process is effected by a blanket washing device (37).
  5. Method according to one of the preceding claims, characterised in that a printing forme, which is to be used for the new print order, is inked over the entire surface and subsequently the supply of damping solution is set in such a way that ink-free regions of the subject become ink free in the running-on state.
EP91105542A 1990-04-27 1991-04-08 Preparation of the inking unit of a printing machine when changing the printing order Expired - Lifetime EP0453855B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013463 1990-04-27
DE4013463A DE4013463A1 (en) 1990-04-27 1990-04-27 PREPARATION OF THE INK OF A PRINTING MACHINE WHEN CHANGING PRINT ORDERS

Publications (2)

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EP0453855A1 EP0453855A1 (en) 1991-10-30
EP0453855B1 true EP0453855B1 (en) 1994-12-07

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EP91105542A Expired - Lifetime EP0453855B1 (en) 1990-04-27 1991-04-08 Preparation of the inking unit of a printing machine when changing the printing order

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EP (1) EP0453855B1 (en)
JP (1) JPH07112524A (en)
AT (1) ATE115047T1 (en)
AU (1) AU643002B2 (en)
CA (1) CA2039354C (en)
DE (2) DE4013463A1 (en)
ES (1) ES2067076T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631469C1 (en) * 1996-08-03 1998-02-19 Roland Man Druckmasch Method and device for performing print jobs

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025277A1 (en) * 1993-05-05 1994-11-10 Machinefabriek 'csw' B.V. Apparatus for transferring a printing fluid to a printing roller
DE4436953C1 (en) * 1994-10-15 1996-05-15 Roland Man Druckmasch Method for generating an ink layer thickness distribution on inking rollers of an inking unit of a printing press
DE10057051B4 (en) 1999-12-06 2011-03-10 Heidelberger Druckmaschinen Ag Method for starting a printing press
DE102008009889A1 (en) * 2008-02-19 2009-08-20 Manroland Ag Process for coloring a printing form in a processing machine
DE102008000725A1 (en) 2008-03-18 2009-09-24 Manroland Ag Inking unit and dampening unit
DE102008000726A1 (en) 2008-03-18 2009-09-24 Manroland Ag Roller for a printing unit
DE102010017866A1 (en) 2009-05-07 2010-11-25 Heidelberger Druckmaschinen Ag Method for controlling an inking unit of a printing machine
DE102010040383B4 (en) * 2010-09-08 2012-09-13 Koenig & Bauer Aktiengesellschaft Printing units and a method for operating a printing unit
JP6093152B2 (en) * 2012-11-12 2017-03-08 株式会社小森コーポレーション Ink supply method and ink supply apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113608B2 (en) * 1971-03-20 1973-10-31 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Method for operating an offset rotary printing machine
DD124643A1 (en) * 1975-11-20 1977-03-09
DE2819257C3 (en) * 1978-05-02 1984-02-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device for releasing or locking the pivoting movement of a lifting roller which can be actuated by a control cam
DE3034588C2 (en) * 1980-09-13 1982-11-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Offset rotary printing machine with a device for interrupting the dampening solution supply
DE3338143C2 (en) * 1983-10-20 1986-12-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Process for generating an ink layer thickness corresponding to the printed image in the inking unit of a printing machine
DE3707695A1 (en) * 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag METHOD FOR DEFINED PRODUCTION OF A COLOR DISTRIBUTION CLOSE TO CONTINUOUS PRINTING IN THE INKING UNIT OF ROTATIONAL PRINTING MACHINES
DE3800570A1 (en) * 1988-01-12 1989-07-20 Heidelberger Druckmasch Ag PRINTING UNIT FOR ROTATIONAL PRINTING MACHINES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631469C1 (en) * 1996-08-03 1998-02-19 Roland Man Druckmasch Method and device for performing print jobs
US5930468A (en) * 1996-08-03 1999-07-27 Man Roland Druckmaschinen Ag Method and device for use in the production of printing products

Also Published As

Publication number Publication date
DE4013463A1 (en) 1991-11-07
AU7534991A (en) 1991-11-07
CA2039354A1 (en) 1991-10-28
ATE115047T1 (en) 1994-12-15
JPH07112524A (en) 1995-05-02
DE4013463C2 (en) 1992-03-19
CA2039354C (en) 1999-10-26
EP0453855A1 (en) 1991-10-30
AU643002B2 (en) 1993-11-04
ES2067076T3 (en) 1995-03-16
DE59103742D1 (en) 1995-01-19

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