EP0529257B1 - Method for setting a production run ink zone profile - Google Patents

Method for setting a production run ink zone profile Download PDF

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Publication number
EP0529257B1
EP0529257B1 EP92111657A EP92111657A EP0529257B1 EP 0529257 B1 EP0529257 B1 EP 0529257B1 EP 92111657 A EP92111657 A EP 92111657A EP 92111657 A EP92111657 A EP 92111657A EP 0529257 B1 EP0529257 B1 EP 0529257B1
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EP
European Patent Office
Prior art keywords
ink
profile
production run
setting
inverse
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EP92111657A
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German (de)
French (fr)
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EP0529257A1 (en
Inventor
Anton Rodi
Robert Müller
Bernd Müller
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/04—Shells for rollers of printing machines for damping rollers
    • 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
    • B41F31/045—Remote control of the duct keys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments

Definitions

  • the invention relates to a method for setting a production ink profile of an offset printing machine with a dampening and inking unit, which has an ink metering device for zone-by-zone adjustment of a color profile according to the required amount of ink, the application rollers of the inking and dampening unit being moved to the printing form in the system position.
  • the inking unit In offset printing machines, it is necessary that a thin ink film is fed to the printing form wetted with dampening solution.
  • An inking unit provided with a large number of rollers is used for this.
  • the dampening solution is supplied by means of a dampening unit, which also has a roller arrangement.
  • a dampening unit which also has a roller arrangement.
  • an appropriately adapted color distribution (color profile) across the printing direction of the offset printing press is required in order to achieve a good printing result.
  • the inking unit therefore has a color metering device which allows the zonal setting of a color profile. Depending on the setting of the individual zones, a corresponding color layer thickness results.
  • the ink is fed from a paint box using a color ductor.
  • the printer has the task of making the zonally required setting of the color metering device depending on the subject color requirements.
  • a so-called ink run-in is also carried out, in which the said color film is built up within the inking unit.
  • displaceable application rollers took up a distance from the printing form at the ink inlet, so that the printing form was not yet colored.
  • the color is also at the ink inlet by traversing friction rollers distributed laterally.
  • the color profile built up by the ink metering device during the ink run-in is evened out to a certain extent so that it is not immediately available to the desired extent at the start of printing.
  • the color profile set zonally on the ink metering device is reconstructed by the interaction and reaction of application rollers and printing form.
  • This measure of the known design according to the invention has made it possible to greatly reduce the amount of waste previously incurred.
  • a color profile corresponding to the production run is quickly achieved.
  • the ink feed results in a color distribution in the inking unit which oversubscribes the desired color profile, ie a higher or lower maximum or Minimum of the zonal ink layer thickness.
  • this effect of overdrawing occurs in subjects with very different zonal color density.
  • the printer has so far manually added paint to the relevant zone areas by means of a spatula in order to at least be able to start the printing process and not to have major problems in the production process.
  • the ink-water balance is disturbed in the case of non-ink-carrying parts of the image.
  • the object of the invention is now to achieve a color profile corresponding to the production run as quickly as possible and to avoid further waste.
  • This object is achieved in that in a first step the amount of ink is controlled so that a color profile inverse to the average ink consumption is generated compared to the desired color profile for the production state and in a second step the amount of ink is controlled so that it corresponds to the desired production color profile.
  • the oversubscription of the color profile described above is currently being used for the invention. It has surprisingly been shown that the production status is achieved much faster and without further waste if you first set the ink metering device so that an inverse color profile is generated, and then adjust the ink metering elements to the optimal production status during the ink run-in.
  • the ink / dampening agent weight is optimal for continuous printing.
  • a color gradient corresponding to reality is built up in the entire inking unit without using the usual waste paper advance. H. without first feeding and printing sheets through the press. This method for quickly reaching the optimal production status is used at the start of printing after interruptions in the printing process, such as. B. with a new start every day after washing the blanket or after changing orders.
  • the amount of ink is supplied in the second step in such a way that it adapts zone by zone to the desired production profile regardless of the distance of the inverse color profile from the desired production color profile.
  • the amount of dampening agent is reduced compared to the amount of dampening agent supplied during production during the ink supply with an inverse color profile.
  • the inverse color profile is set via an electronic computing and control device.
  • the optimal continuous printing color profile is detected by means of a plate reader, which determines the area coverage per zone, then the appropriate inverse color profile is determined using this data, and the ink metering device is then set accordingly.
  • the production printing profile can also be preset with a light pen or keyboard and then carried out accordingly with the computing device according to the invention.
  • the advantages achieved with the invention are, in particular, to achieve the fastest possible and optimal production status, with only a minor one Amount of waste is incurred.
  • the use of the inverse color profile creates an ideal color-water balance achieved. Lubrication and emulsification are avoided. In particular, the production process is optimally prepared for larger orders.
  • FIG. 3 shows the average value of the solid color density D V as a function of the number of sheets B Z.
  • the horizontal curves a and b show the waste in the case of overstaining or understaining.
  • the setting is optimal if, as the curve I shows, it lies between the horizontal lines a and b.
  • the dotted curve I strives for the ideal final value after a relatively small number of arches
  • the solid curve II which corresponds to the setting of the ink layer thickness without inverse control, only reaches the optimum state later. This eliminates the need for previous waste paper sheets (approx. 100-300 sheets) and the production process can be started with very little waste (10 to 50 sheets).

Abstract

The invention relates to a method for setting a production run ink zone profile of an offset printing machine. Firstly, an ink zone profile is set which is inverted relative to the desired ink zone profile and said inverted ink zone profile is then matched to the actually desired ink zone profile.

Description

Die Erfindung betrifft ein Verfahren zum Einstellen eines Fortdruckfarbprofils einer Offsetdruckmaschine mit Feucht- und Farbwerk, welches eine Farbdosiereinrichtung zum zonenweisen Einstellen eines Farbprofils entsprechend der benötigten Farbmenge aufweist, wobei die Auftragswalzen des Farb- und Feuchtwerkes in Anlagestellung an die Druckform verlagert sind.The invention relates to a method for setting a production ink profile of an offset printing machine with a dampening and inking unit, which has an ink metering device for zone-by-zone adjustment of a color profile according to the required amount of ink, the application rollers of the inking and dampening unit being moved to the printing form in the system position.

Bei Offset-Druckmaschinen ist es erforderlich, daß der mit Feuchtmittel benetzten Druckform ein dünner Farbfilm zugeführt wird. Hierzu dient ein mit einer Vielzahl von Walzen versehenes Farbwerk. Die Feuchtmittelzufuhr erfolgt mittels eines Feuchtwerkes, das ebenfalls eine Walzenanordnung aufweist. Je nach Sujet der Druckform ist eine entsprechend angepaßte Farbverteilung (Farbprofil) quer zur Druckrichtung der Offset-Druckmaschine erforderlich, um ein gutes Druckergebnis zu erzielen. Das Farbwerk weist daher eine Farbdosiereinrichtung auf, die die zonale Einstellung eines Farbprofils gestattet. In Abhängigkeit von der Einstellung der einzelnen Zonen ergibt sich eine entsprechende Farbschichtdicke. Die Zuführung der Farbe erfolgt mittels eines Farbduktors aus einem Farbkasten. Dem Drucker kommt die Aufgabe zu, die jeweils zonal erforderliche Einstellung der Farbdosiereinrichtung in Abhängigkeit der Sujet-Farbbedarfs vorzunehmen. Vor dem eigentlichen Druck wird ferner ein sogenannter Farbeinlauf durchgeführt, bei dem der genannte Farbfilm innerhalb des Farbwerkes aufgebaut wird. Nach dem Stand der Technik nahmen verlagerbare Auftragswalzen beim Farbeinlauf eine Abstandstellung zur Druckform ein, so daß noch keine Einfärbung der Druckform erfolgte.In offset printing machines, it is necessary that a thin ink film is fed to the printing form wetted with dampening solution. An inking unit provided with a large number of rollers is used for this. The dampening solution is supplied by means of a dampening unit, which also has a roller arrangement. Depending on the subject of the printing form, an appropriately adapted color distribution (color profile) across the printing direction of the offset printing press is required in order to achieve a good printing result. The inking unit therefore has a color metering device which allows the zonal setting of a color profile. Depending on the setting of the individual zones, a corresponding color layer thickness results. The ink is fed from a paint box using a color ductor. The printer has the task of making the zonally required setting of the color metering device depending on the subject color requirements. Before the actual printing, a so-called ink run-in is also carried out, in which the said color film is built up within the inking unit. According to the prior art, displaceable application rollers took up a distance from the printing form at the ink inlet, so that the printing form was not yet colored.

Neben der Farbverteilung in Umfangsrichtung wird die Farbe beim Farbeinlauf durch traversierende Reiberwalzen auch seitlich verteilt. Neben den bekannten Vorteilen des seitlichen Verreibens ohne angestellte Auftragswalzen wird das von der Farbdosiereinrichtung während des Farbeinlaufes aufgebaute Farbprofil zu einem gewissen Grade wieder vergleichmäßigt, so daß es zu Druckbeginn nicht sogleich in gewünschtem Maße zur Verfügung steht. Um diesem Nachteil abzuhelfen wurde gemäß DE 40 13 740 A1 vorgeschlagen, die rotierenden Auftragwalzen von Farb- und Feuchtwerk in Anlagestellung an die Druckform zu bringen. Dieses hat zur Folge, daß das Sujet der Druckplatte auf die Farbverteilung derart unterstützend einwirkt, daß sich eine dem Sujet weitestgehend entsprechende Farbprofilierung einstellt. Das an der Farbdosiereinrichtung zonal eingestellte Farbprofil wird durch die Wechsel- und Rückwirkung von Auftragswalzen und Druckform wieder aufgebaut. Durch diese erfindungsgemäße Maßnahme der bekannten Ausführung konnte die bisher angefallene Makulatur stark verringert werden. Ein dem Fortdruck entsprechendes Farbprofil wird schnell erreicht.In addition to the color distribution in the circumferential direction, the color is also at the ink inlet by traversing friction rollers distributed laterally. In addition to the known advantages of lateral rubbing without the application rollers being applied, the color profile built up by the ink metering device during the ink run-in is evened out to a certain extent so that it is not immediately available to the desired extent at the start of printing. In order to remedy this disadvantage, it has been proposed according to DE 40 13 740 A1 to bring the rotating applicator rollers of the inking and dampening units into contact with the printing form in the contact position. The result of this is that the subject of the printing plate has a supporting effect on the color distribution in such a way that a color profile that largely corresponds to the subject is established. The color profile set zonally on the ink metering device is reconstructed by the interaction and reaction of application rollers and printing form. This measure of the known design according to the invention has made it possible to greatly reduce the amount of waste previously incurred. A color profile corresponding to the production run is quickly achieved.

Es hat sich bei dem bekannten Verfahren gezeigt, daß sich bei angelegten Auftragswalzen und bei der dem gewünschten Fortdruckfarbprofil eingestellter Farbdosiereinrichtung durch den Farbeinlauf eine Farbverteilung im Farbwerk einstellt, welche das gewünschte Farbprofil überzeichnet, d. h. es stellt sich beispielsweise ein höheres bzw. niedrigeres Maximum bzw. Minimum der zonalen Farbschichtdicke ein. Insbesondere tritt dieser Effekt des überzeichnens bei Sujets mit stark unterschiedlicher zonalen Farbflächendichte auf. Um diesen Effekt in diesen Grenzfällen zu begrenzen, wurde bisher vom Drucker in die betreffenden Zonenbereiche mittels Spachtel manuell Farbe zugeführt, um mindestens den Druckprozeß starten zu können und nicht zu große Probleme im Produktionsprozeß zu haben. Dabei wird jedoch das Farb-Wassergleichgewicht bei nicht farbführenden Bildteilen empfindlich gestört.It has been shown in the known method that when the application rollers are applied and the ink metering device is adjusted to the desired production ink profile, the ink feed results in a color distribution in the inking unit which oversubscribes the desired color profile, ie a higher or lower maximum or Minimum of the zonal ink layer thickness. In particular, this effect of overdrawing occurs in subjects with very different zonal color density. In order to limit this effect in these borderline cases, the printer has so far manually added paint to the relevant zone areas by means of a spatula in order to at least be able to start the printing process and not to have major problems in the production process. However, the ink-water balance is disturbed in the case of non-ink-carrying parts of the image.

Der Erfindung liegt nunmehr die Aufgabe zugrunde, ein dem Fortdruck entsprechendes Farbprofil möglichst schnell zu erreichen und weiteren Makulaturanfall zu vermeiden.The object of the invention is now to achieve a color profile corresponding to the production run as quickly as possible and to avoid further waste.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in einem ersten Schritt die Farbmengenzufuhr so gesteuert wird, daß gegenüber dem gewünschten Farbprofil für den Fortdruckzustand ein zu dem mittleren Farbverbrauch inverses Farbprofil erzeugt wird und daß in einem zweiten Schritt die Farbmengenzufuhr so gesteuert wird, daß sie dem gewünschten Fortdruckfarbprofil entspricht.This object is achieved in that in a first step the amount of ink is controlled so that a color profile inverse to the average ink consumption is generated compared to the desired color profile for the production state and in a second step the amount of ink is controlled so that it corresponds to the desired production color profile.

Die oben beschriebene überzeichnung des Farbprofils wird gerade für die Erfindung ausgenutzt. Es hat sich nämlich in überraschender Weise gezeigt, daß der Fortdruckzustand wesentlich schneller und ohne weiteren Makulaturanfall erreicht wird, wenn man zunächst eine Einstellung der Farbdosiereinrichtung so vornimmt, daß ein inverses Farbprofil erzeugt wird, und dann während des Farbeinlaufes die Farbdosierelemente dem optimalen Fortdruckzustand anpaßt. Es stellt sich ein für den Fortdruck optimales Farbe-Feuchtmittel-Glelchgewicht ein. Im gesamten Farbwerk wird ein der Wirklichkeit entsprechendes Farbgefälle aufgebaut, ohne den üblichen Makulaturvorlauf zu benutzten, d. h. ohne Bögen vorher durch die Druckmaschine zu fördern und zu bedrucken. Dieses Verfahren zum schnellen Erreichen des optimalen Fortdruckzustandes findet Anwendung zu Druckbeginn nach Unterbrechungen des Druckprozesses, wie z. B. bei täglichem Neubeginn nach dem Gummituchwaschen oder nach Auftragswechsel.The oversubscription of the color profile described above is currently being used for the invention. It has surprisingly been shown that the production status is achieved much faster and without further waste if you first set the ink metering device so that an inverse color profile is generated, and then adjust the ink metering elements to the optimal production status during the ink run-in. The ink / dampening agent weight is optimal for continuous printing. A color gradient corresponding to reality is built up in the entire inking unit without using the usual waste paper advance. H. without first feeding and printing sheets through the press. This method for quickly reaching the optimal production status is used at the start of printing after interruptions in the printing process, such as. B. with a new start every day after washing the blanket or after changing orders.

Nach einer Weiterbildung der Erfindung ist vorgesehen, daß die Farbmengenzufuhr im zweiten Schritt so erfolgt, daß sie sich zonenweise gleichzeitig an das gewünschte Fortdruckprofil anpaßt, unabhängig vom Abstand des inversen Farbprofils vom gewünschten Fortdruckfarbprofil.According to a further development of the invention, it is provided that the amount of ink is supplied in the second step in such a way that it adapts zone by zone to the desired production profile regardless of the distance of the inverse color profile from the desired production color profile.

Da im Bereich der Extremwerte des inversen Farbprofils und des tatsächlich gewünschten Farbprofils die Dauer des Einstellens der Farbdosierelemente größer ist als im Bereich der Wendepunkte (mittlere Voreinstellung der Zonen eines Druckwerkes), ist eine Steuerung vorgesehen, die die zeitlichen Unterschiede in der Weise ausgleicht, daß sich eine möglichst schnelle Anpassung an den optimalen Zustand ergibt.Since in the area of the extreme values of the inverse color profile and the actually desired color profile the duration of the setting of the ink metering elements is longer than in the area of the turning points (average presetting of the zones of a printing unit), a control is provided which compensates for the time differences in such a way that the fastest possible adaptation to the optimal condition results.

Weiterhin ist erfindungsgemäß vorgesehen, daß während der Farbmengenzufuhr mit inversem Farbprofil die Feuchmittelmenge gegenüber der beim Fortdruck zugeführten Feuchtmittelmenge reduziert wird.Furthermore, it is provided according to the invention that the amount of dampening agent is reduced compared to the amount of dampening agent supplied during production during the ink supply with an inverse color profile.

Es ist erfindungsgemäß möglich, daß die Feuchtwerksteuerung in Abstimmung mit der Farbdosiereinrichtung -in Abstimmung mit den Auftragswalzen und der Zwischenwalze- so zu steuern, daß optimale Fortdruckzustände erreicht werden.It is possible according to the invention to control the dampening system control in coordination with the ink metering device - in coordination with the application rollers and the intermediate roller - in such a way that optimal production conditions are achieved.

Nach einer weiteren Ausführungsform der Erfindung ist vorgesehen, daß die Einstellung des inversen Farbprofils über eine elektronische Rechen- und Steuereinrichtung erfolgt.According to a further embodiment of the invention, it is provided that the inverse color profile is set via an electronic computing and control device.

Beispielsweise wird das optimale Fortdruckfarbprofil mittels eines Plattenlesers, der die Flächendeckungen pro Zone ermittelt, erfaßt, dann mittels dieser Daten das geeignete inverse Farbprofil ermittelt und dann die Farbdosiereinrichtung entsprechend eingestellt. Das Fortdruckprofil kann auch mit Lichtgriffel oder Tastatur voreingestellt werden und dann entsprechend mit der Recheneinrichtung erfindungsgemäß ausgeführt werden.For example, the optimal continuous printing color profile is detected by means of a plate reader, which determines the area coverage per zone, then the appropriate inverse color profile is determined using this data, and the ink metering device is then set accordingly. The production printing profile can also be preset with a light pen or keyboard and then carried out accordingly with the computing device according to the invention.

Die mit der Erfindung erzielten Vorteile liegen insbesondere darin, einen möglichst schnellen und optimalen Fortdruckzustand zu erreichen, wobei nur eine geringfügige Menge an Makulatur anfällt. Durch die Anwendung des inversen Farbprofils wird ein ideales Farbe-Wasser-Gleichgewicht erzielt. Ein Schmieren und Emulgieren wird vermieden. Insbesondere wird der Produktionsprozeß für größere Aufträge optimal vorbereitet.The advantages achieved with the invention are, in particular, to achieve the fastest possible and optimal production status, with only a minor one Amount of waste is incurred. The use of the inverse color profile creates an ideal color-water balance achieved. Lubrication and emulsification are avoided. In particular, the production process is optimally prepared for larger orders.

Die Erfindung wird im nachfolgenden anhand der Figuren näher erläutert. Es zeigen:

Fig. 1
ein Diagramm eines Farbprofils,
Fig. 2
die Darstellung der verschiedenen Farbmengen und
Fig. 3
ein Diagramm der Farbschichtdicke beim Farbeinlauf
Die Figur 1 zeigt ein Diagramm, bei dem die Farbschichtdicke FZ gegen die Zonen Z aufgetragen ist. Dargestellt ist ein Profil der Farbschichtdicke, wobei die durch den Farbduktor eingestellte Farbstreifenbreite konstant gehalten wurde (z. B. 50%). Diesem Profil entspricht in etwa die in Figur 2 dargestellte Farbmenge VF, welche als durchgezogene Kurve über die Zonen Z aufgetragen ist. Die Farbmenge VF ist dem Produkt von Duktorhub FD und Zonenöffnung FZ proportional. Die Kurve entspricht der gewünschten Farbmenge für den Fortdruckzustand. Die Kurve weist beispielsweise zwei Maxima und ein Minimum auf. Durch die Wendepunkte zwischen den Extrema führt eine waagrechte Linie, die dem mittleren Farbverbrauch über alle Zonen eines Druckwerkes entspricht. Wenn nunmehr die Auftragswalzen an der Druckform anliegen, und es würde die Farbdosiereinrichtung so eingestellt werden, daß sich für die Farbmenge zonal die durchgezogene Kurve (dem Fortdruckprozeß entsprechend) ergibt, findet zunächst eine über- bzw. Unterdosierung statt (gemäß der punktierten Kurve), wie oben beschrieben. Die Erfindung nutzt diesen Effekt aus, wobei ein überraschend positives Ergebnis erzielt wird. Zunächst wird die Farbdosiervorrichtung, d. h. die Farbzufuhr der Zonen so eingestellt, daß sich eine inverse Farbmengenverteilung gemäß der gestrichelten Kurve ergibt und dann diese Einstellung so verändert, daß sich der Verlauf der gestrichelten Kurve dem Verlauf der durchgezogenen Kurve anpaßt, d. h. der optimale Fortdruckzustand und damit ein optimales Farbe-Wasser-Gleichgewicht erreicht ist. Die Annährung der inversen Kurve an die gewünschte Kurve ist durch Pfeile angedeutet.The invention is explained in more detail below with reference to the figures. Show it:
Fig. 1
a diagram of a color profile,
Fig. 2
the representation of the different amounts of color and
Fig. 3
a diagram of the ink layer thickness at the ink inlet
FIG. 1 shows a diagram in which the ink layer thickness F Z is plotted against the zones Z. A profile of the ink layer thickness is shown, the ink strip width set by the ink ductor being kept constant (e.g. 50%). This profile corresponds approximately to the amount of color V F shown in FIG. 2, which is plotted as a solid curve over the zones Z. The amount of ink V F is proportional to the product of duct stroke F D and zone opening F Z. The curve corresponds to the desired amount of ink for the production status. For example, the curve has two maxima and a minimum. A horizontal line leads through the turning points between the extremes, which corresponds to the average ink consumption across all zones of a printing unit. If the application rollers are now in contact with the printing form and the ink metering device would be set so that the solid curve (corresponding to the production process) results for the ink quantity zonally, an overdosing or underdosing takes place (according to the dotted curve), as described above. The invention exploits this effect, whereby a surprisingly positive result is achieved. First of all, the ink metering device, ie the ink supply to the zones, is set in such a way that an inverse ink quantity distribution is obtained results in the dashed curve and then changes this setting so that the course of the dashed curve adapts to the course of the solid curve, ie the optimal production status and thus an optimal ink-water balance is reached. The approach of the inverse curve to the desired curve is indicated by arrows.

Figur 3 zeigt den Durchschnittswert der Volltondichte DV als Funktion der Bogenzahl BZ. Mit den horizontalen Kurven a beziehungsweise b ist die Makulatur bei Überfärbung beziehungsweise bei Unterfärbung dargestellt. Die Einstellung ist optimal, wenn wie es die Kurve I zeigt, diese zwischen den Horizontalen a und b liegt. Deutlich ist erkennbar, daß nach dem erfindungsgemäßen Verfahren schon nach relativ wenigen Bögen die punktierte Kurve I dem idealen Endwert zustrebt, wohin gegen die durchgezogene Kurve II, welche der Einstellung der Farbschichtdicke ohne inverse Steuerung entspricht, erst später den optimalen Zustand erreicht. Damit werden bisher übliche Makulaturvorlaufbögen (ca. 100-300 Bögen) überflüssig und der Produktionsprozeß kann mit sehr geringem Makulaturanfall ( 10 bis 50 Bögen) gestartet werden.FIG. 3 shows the average value of the solid color density D V as a function of the number of sheets B Z. The horizontal curves a and b show the waste in the case of overstaining or understaining. The setting is optimal if, as the curve I shows, it lies between the horizontal lines a and b. It can clearly be seen that, according to the method according to the invention, the dotted curve I strives for the ideal final value after a relatively small number of arches, whereas the solid curve II, which corresponds to the setting of the ink layer thickness without inverse control, only reaches the optimum state later. This eliminates the need for previous waste paper sheets (approx. 100-300 sheets) and the production process can be started with very little waste (10 to 50 sheets).

Claims (4)

  1. Method for setting a production run ink profile of an offset printing machine having a damping and inking unit which has an ink metering device for zonal setting of an ink profile corresponding to the quantity of ink required, the applicator rollers of the inking and damping unit being displaced into a contact position against the printing forme, characterized in that the supply of the ink quantity is controlled in a first step in such a way that an inverse ink profile relative to the mean ink consumption is produced compared to the desired ink profile for the production-run state, and in that the supply of the ink quantity is controlled in a second step in such a way that it corresponds to the desired production run ink profile.
  2. Method according to Claim 1, characterized in that the supply of the ink quantity takes place in the second step in such a way that it adapts simultaneously in zones to the desired production run ink profile, irrespective of the spacing of the inverse ink profile from the desired production run ink profile.
  3. Method according to Claim 1 or 2, characterized in that, during the supply of the ink quantity with an inverse ink profile relative to the mean ink consumption, the quantity of damping solution is reduced compared to the quantity of damping solution supplied during the production run.
  4. Method according to at least one of the preceding claims, characterized in that the setting of the inverse ink profile relative to the mean ink consumption takes place by means of an electronic calculating and control device.
EP92111657A 1991-08-28 1992-07-09 Method for setting a production run ink zone profile Expired - Lifetime EP0529257B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128537A DE4128537A1 (en) 1991-08-28 1991-08-28 METHOD FOR SETTING A CONTINUOUS COLOR PROFILE
DE4128537 1991-08-28

Publications (2)

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EP0529257A1 EP0529257A1 (en) 1993-03-03
EP0529257B1 true EP0529257B1 (en) 1995-10-18

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EP92111657A Expired - Lifetime EP0529257B1 (en) 1991-08-28 1992-07-09 Method for setting a production run ink zone profile

Country Status (6)

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EP (1) EP0529257B1 (en)
JP (1) JP3073609B2 (en)
AT (1) ATE129193T1 (en)
AU (1) AU658428B2 (en)
DE (2) DE4128537A1 (en)
ES (1) ES2080388T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP1232862A1 (en) 2001-02-15 2002-08-21 MAN Roland Druckmaschinen AG Method for starting up an offset rotary printing machine

Families Citing this family (11)

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DE4429481C2 (en) * 1993-12-02 1995-12-21 Roland Man Druckmasch Process for supplying ink to a printing press
EP0657288B1 (en) * 1993-12-02 1997-04-09 MAN Roland Druckmaschinen AG Method for supplying ink in a printing machine
DE4412601C2 (en) * 1994-04-13 2003-06-18 Heidelberger Druckmasch Ag Method for controlling or regulating inking in an inking unit of an offset printing press
DE19516333A1 (en) * 1995-05-04 1996-11-07 Heidelberger Druckmasch Ag Process for controlling or regulating the coloring of a printing press
DE19615156B4 (en) * 1996-04-17 2007-12-27 Man Roland Druckmaschinen Ag Method for supplying a printing press with color
DE19701219A1 (en) * 1997-01-16 1998-07-23 Heidelberger Druckmasch Ag Control of inking when printing with dosing altered depending on printing speed
DE19720954C2 (en) * 1997-05-17 2001-02-01 Roland Man Druckmasch Process for setting up the ink guide in continuous printing in a rotary printing press
DE19727387C5 (en) * 1997-06-27 2010-01-21 Manroland Ag Method and device for controlling the ink supply in printing machines
JP4139012B2 (en) 1999-09-06 2008-08-27 株式会社小森コーポレーション Method and apparatus for adjusting ink supply amount of printing press
DE102005013634A1 (en) * 2005-03-24 2006-09-28 Man Roland Druckmaschinen Ag Method for operating a printing press
DE102012002260A1 (en) * 2011-02-24 2012-08-30 Heidelberger Druckmaschinen Aktiengesellschaft Machine-dependent compensation in inking unit and dampening unit

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DE1561100A1 (en) * 1966-12-27 1970-02-12 Planeta Veb Druckmasch Werke Inking unit of rotary printing machines
US3926115A (en) * 1973-02-01 1975-12-16 Strachan & Henshaw Ltd Spray dampening apparatus
US4000692A (en) * 1974-12-03 1977-01-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag Throw-off system for rotary offset printing press
DE3204501C1 (en) * 1982-02-10 1983-10-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device for regulating the ink supply in a rotary printing press
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
DE3614555A1 (en) * 1986-04-29 1987-11-05 Heidelberger Druckmasch Ag METHOD AND ARRANGEMENTS FOR ADJUSTING THE TIME OF USE OF THE LATERAL DISTRIBUTION FOR PRINTING MACHINES
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
EP0403861B1 (en) * 1989-06-19 1994-08-31 Heidelberger Druckmaschinen Aktiengesellschaft Method of rapid attainment of print-readiness
DE4013740C3 (en) * 1989-06-19 1999-04-08 Heidelberger Druckmasch Ag Method and device for quickly reaching the production status in an offset printing press

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1232862A1 (en) 2001-02-15 2002-08-21 MAN Roland Druckmaschinen AG Method for starting up an offset rotary printing machine
DE10106986A1 (en) * 2001-02-15 2002-09-05 Roland Man Druckmasch Method for starting an offset rotary printing press
US6622626B2 (en) * 2001-02-15 2003-09-23 Man Roland Druckmaschinen Ag Method of starting up a rotary offset printing machine
DE10106986B4 (en) * 2001-02-15 2008-04-24 Man Roland Druckmaschinen Ag Method for starting up an offset rotary printing machine

Also Published As

Publication number Publication date
ES2080388T3 (en) 1996-02-01
JP3073609B2 (en) 2000-08-07
DE4128537C2 (en) 1993-07-08
AU658428B2 (en) 1995-04-13
JPH05220936A (en) 1993-08-31
EP0529257A1 (en) 1993-03-03
DE59204053D1 (en) 1995-11-23
AU2130492A (en) 1993-03-04
DE4128537A1 (en) 1993-03-04
ATE129193T1 (en) 1995-11-15

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