EP1369234A1 - Method for restarting the printing after an interruption - Google Patents

Method for restarting the printing after an interruption Download PDF

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Publication number
EP1369234A1
EP1369234A1 EP03010329A EP03010329A EP1369234A1 EP 1369234 A1 EP1369234 A1 EP 1369234A1 EP 03010329 A EP03010329 A EP 03010329A EP 03010329 A EP03010329 A EP 03010329A EP 1369234 A1 EP1369234 A1 EP 1369234A1
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EP
European Patent Office
Prior art keywords
ink
printing
plate cylinder
color
lifter
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Granted
Application number
EP03010329A
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German (de)
French (fr)
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EP1369234B1 (en
Inventor
Arndt Jentzsch
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Koenig and Bauer AG
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Koenig and Bauer AG
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Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1369234A1 publication Critical patent/EP1369234A1/en
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/11—Pre-inking

Definitions

  • the invention relates to a method for starting the production after a print interruption, in which the plate cylinder of a printing press during the printing process Color is supplied. This is done by storing the one in the color box Paint via an intermittent paint lifter on a multi-roller the inking unit assigned to the plate cylinder is transmitted. The plate cylinder is fed to fountain solution in the printing process via a dampening system. During the When the print is interrupted, the lifting stroke is stopped, the ink supply from the inking unit to the plate cylinder and the sheet run is interrupted and resumed The ink lifter is activated during the printing process after the print interruption.
  • Inking unit turns up after a certain number of machine revolutions for the continuous printing desired ink layer thickness on the contacting the printing form Inking rollers.
  • a color gradient occurs that affects the layer thickness between the rollers near the ink fountain and the inking rollers.
  • the inking rollers are switched off from the printing form and the ink supply through the ink lifter is interrupted.
  • both the ink profile on the ink application rollers is disturbed as also the color gradient is evened out.
  • the layer thickness on the inking rollers is too small and it takes a long time Time until the ink layer has reached the printing thickness. The result The resulting amount of waste significantly reduces the productivity of the printing press.
  • the process described in DE 44 36 953 C1 can also reduce the problem of color depletion do not loosen the rollers near the ink fountain.
  • a quantity of ink is introduced into the inking unit at the ink ductor, whereby this color quantity corresponds to the so-called basic color quantity of the order.
  • the upcoming print job set the required color profile until then the actual one Printing with release of the sheet run and the starting of the printing unit cylinder takes place.
  • the lifting strip width is provided set to a possible maximum value, d. H.
  • the lifter roller takes the largest possible amount of paint from the ink fountain pen and transfers it the ink rollers downstream of the ink lifter. It is also provided that the Printing machine is run up to the highest possible speed (if possible the maximum speed of the machine), so that the corresponding number of machine revolutions is run through in the shortest possible time.
  • the object of the invention is to develop a method by which the Incidence of waste is reduced.
  • the invention has the advantage that the printing press can now print faster comes.
  • the color depletion of the rollers near the ink fountain is counteracted and the ink / fountain solution balance is established earlier. This will make the waste reduced.
  • the pressure is interrupted, a known lift lock is used and thus the Ink supply to the inking unit interrupted.
  • the inking rollers turned off from the plate cylinder, so that their contact with the printing plate is interrupted becomes.
  • at least one pair of rollers can also be separated, so that two or more roll strands are created.
  • the time of the printing interruption detected and connected to a computing unit also not described in detail Control fed.
  • machine-related data such as number of rolls, diameter of the rolls, number and location of the roll separation and the like
  • job-related data is recorded or recorded there.
  • the lifter lock is deactivated in a first step. This provides the inking unit with color again. If there is one This separation is lifted. In the area near the ink fountain there are far fewer Roller pairs arranged so that here, due to the smaller number of Ink splitting processes, a larger ink layer thickness builds up on these rollers than on the rollers near the plate cylinders.
  • the time is calculated from the machine-related and job-related data, to which there is a gradient of ink layers close to the production on the ink box near Has trained rollers. In particular, it is also taken into account whether color strand separations available.
  • the time of commissioning the dampening system is also activated during the stroke cycle. It does that for some Jobs a faster adjustment of the ink / fountain solution balance. Furthermore is it is also possible to switch on the dampening unit between the time switching on the ink lifter and starting the sheet run.
  • the time for using the dampening system can be as well as the time of use the color lifter from the machine-related provided by the control and calculate job-related data.

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

Abstract

Process for starting a production run comprises feeding ink to the plate cylinder of a printing machine during the printing process, transferring the ink stored in an ink box via an ink siphon to an inker unit assigned to the plate cylinder and consisting of rollers, and feeding moistening water to the plate cylinder during printing via a damping system. During a break in printing, the ink siphon is taken out of action, the ink supply from the inking unit to the plate cylinder is stopped, and the ink siphon is reconnected after the printing break. Preferred Features: The number of ink siphon cycles required before the start of the curve is determined depending on the length of the printing break.

Description

Die Erfindung betrifft ein Verfahren zum Anfahren des Fortdrucks nach einer Druckunterbrechung, bei dem während des Druckprozesses dem Plattenzylinder einer Druckmaschine Farbe zugeführt wird. Das geschieht, indem die in dem Farbkasten bevorratete Farbe über einen intermittierenden Farbheber auf ein aus mehreren Walzen bestehendes, dem Plattenzylinder zugeordnetes Farbwerk übertragen wird. Dem Plattenzylinder wird im Druckprozess über ein Feuchtwerk Feuchtwasser zugeführt. Während der Druckunterbrechung wird die Hebertaktung stillgesetzt, die Farbzufuhr vom Farbwerk zum Plattenzylinder sowie der Bogenlauf wird unterbrochen und zur Wiederaufnahme des Druckprozesses nach der Druckunterbrechung wird der Farbheber zugeschaltet.The invention relates to a method for starting the production after a print interruption, in which the plate cylinder of a printing press during the printing process Color is supplied. This is done by storing the one in the color box Paint via an intermittent paint lifter on a multi-roller the inking unit assigned to the plate cylinder is transmitted. The plate cylinder is fed to fountain solution in the printing process via a dampening system. During the When the print is interrupted, the lifting stroke is stopped, the ink supply from the inking unit to the plate cylinder and the sheet run is interrupted and resumed The ink lifter is activated during the printing process after the print interruption.

Infolge von Farb-Spaltvorgängen an den Walzenpaarungen des oben beschriebenen Farbwerkes stellt sich nach einer bestimmten Anzahl von Maschinenumdrehungen die für den Fortdruck gewünschte Farbschichtdicke auf den die Druckform kontaktierenden Farbauftragwalzen ein. Es entsteht ein die Schichtdicke betreffendes Farbgefälle zwischen den farbkastennahen Walzen und den Farbauftragwalzen.As a result of ink splitting processes on the roller pairings of the one described above Inking unit turns up after a certain number of machine revolutions for the continuous printing desired ink layer thickness on the contacting the printing form Inking rollers. A color gradient occurs that affects the layer thickness between the rollers near the ink fountain and the inking rollers.

Bei Unterbrechung des Druckes werden die Farbauftragwalzen von der Druckform abgestellt und die Farbzufuhr durch den Farbheber wird unterbrochen. Durch das Weiterlaufen der Farbwalzen wird sowohl das Farbprofil an den Farbauftragwalzen gestört als auch das Farbgefälle vergleichmäßigt. Beim Wiederanfahren nach der Druckunterbrechung ist die Schichtdicke an den Farbauftragwalzen zu gering und es dauert geraume Zeit, bis sich die fortdruckgerechte Stärke der Farbschicht eingestellt hat. Der dadurch entstehende Makulaturanfall verringert die Produktivität der Druckmaschine erheblich.If printing is interrupted, the inking rollers are switched off from the printing form and the ink supply through the ink lifter is interrupted. By walking on the ink rollers, both the ink profile on the ink application rollers is disturbed as also the color gradient is evened out. When restarting after the print interruption the layer thickness on the inking rollers is too small and it takes a long time Time until the ink layer has reached the printing thickness. The result The resulting amount of waste significantly reduces the productivity of the printing press.

Dem wird entgegengewirkt, indem im Farbwerk die Walzenstränge mindestens einmal getrennt werden. Das heißt, es werden die Walzenpaarungen aufgehoben, so dass die Farbübertragung unterbrochen und die Ausgleichvorgänge nur innerhalb dieser Teilstränge erfolgen kann. Mit Beginn des Fortdrucks ist somit die Schichtdickendifferenz zwar kleiner, jedoch fehlt bei den farbkastennahen Walzen Farbe, so dass es nach einer Anzahl Druckbogen zu einem Farbeinbruch kommt. Derartige Farbwerke werden in der DD 221 690 A1 und auch in der DD 44 39 144 beschrieben. This is counteracted by the roller strands at least once in the inking unit be separated. This means that the roller pairings are canceled so that the Color transfer interrupted and the compensation processes only within these sub-strands can be done. With the start of production, the difference in layer thickness is thus Although smaller, the rollers near the ink fountain lack color, so that after a Number of printed sheets for a drop in color. Such inking units are used in the DD 221 690 A1 and also described in DD 44 39 144.

Auch das in der DE 44 36 953 C1 beschriebene Verfahren kann das Problem Farbverarmung der farbkastennahen Walzen nicht lösen. Bei dem dort beschriebenen Verfahren wird während einer ersten Anzahl von Maschinenumdrehungen durch die Farbdosierelemente an dem Farbduktor eine Farbmenge in das Farbwerk eingebracht, wobei diese Farbmenge der sogenannten Grundfarbmenge des Auftrages entspricht. Daraufhin wird während einer zweiten Anzahl von Maschinenumdrehungen das für den kommenden Druckauftrag erforderliche Farbprofil eingestellt, bis dann der eigentliche Druck mit Freigeben des Bogenlaufes und dem Anstellen der Druckwerkzylinder erfolgt. Um die für das Einlaufen der Farbe nötige Zeit zu verkürzen, ist vorgesehen, die Heberstreifenbreite auf einen möglichen Maximalwert einzustellen, d. h. die Heberwalze nimmt die größtmögliche Farbmenge von dem Farbduktor ab und überträgt diese auf die dem Farbheber nachgeordneten Farbwalzen. Weiterhin ist vorgesehen, dass die Druckmaschine auf eine möglichst hohe Geschwindigkeit hochgefahren wird (möglichst die Maximalgeschwindigkeit der Maschine), so dass die entsprechende Anzahl von Maschinenumdrehungen in der kürzest möglichen Zeit durchlaufen wird.The process described in DE 44 36 953 C1 can also reduce the problem of color depletion do not loosen the rollers near the ink fountain. In the process described there during a first number of machine revolutions by the ink metering elements a quantity of ink is introduced into the inking unit at the ink ductor, whereby this color quantity corresponds to the so-called basic color quantity of the order. thereupon during a second number of machine revolutions the upcoming print job set the required color profile until then the actual one Printing with release of the sheet run and the starting of the printing unit cylinder takes place. In order to shorten the time required for the running in of the paint, the lifting strip width is provided set to a possible maximum value, d. H. the lifter roller takes the largest possible amount of paint from the ink fountain pen and transfers it the ink rollers downstream of the ink lifter. It is also provided that the Printing machine is run up to the highest possible speed (if possible the maximum speed of the machine), so that the corresponding number of machine revolutions is run through in the shortest possible time.

Die Aufgabe der Erfindung besteht darin, ein Verfahren zu entwickeln, durch das der Anfall von Makulatur verringert wird.The object of the invention is to develop a method by which the Incidence of waste is reduced.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des 1. Anspruchs gelöst.According to the invention the object is solved by the features of claim 1.

Die Erfindung hat den Vorteil, dass nunmehr die Druckmaschine schneller in Druck kommt. Der Farbverarmung der farbkastennahen Walzen wird entgegen gewirkt und das Farbe/Feuchtwasser-Gleichgewicht stellt sich früher ein. Dadurch wird die Makulatur verringert.The invention has the advantage that the printing press can now print faster comes. The color depletion of the rollers near the ink fountain is counteracted and the ink / fountain solution balance is established earlier. This will make the waste reduced.

Die Erfindung soll nachfolgend an Hand eines Ausführungsbeispiels näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment become.

Es wird dabei von einem Farbwerk ausgegangen, bei dem die in einem Farbkasten bevorratete Farbe im Druckbetrieb über einen intermittierenden Farbheber auf ein mit dem Plattenzylinder verbundenes Farbwerk mit mehreren Farbwalzen übertragen wird. Durch die Farbspaltvorgänge an den Walzenpaarungen entsteht ein Farbschichtdickengefälle, ausgehend von den farbkastennahen Walzen bis zu den die Druckplatte kontaktierenden Farbauftragwalzen.It is assumed that there is an inking unit in which the ink is stored in an ink fountain Color in print mode with an intermittent ink lifter on a the inking unit connected to the plate cylinder is transferred with several inking rollers. The ink splitting processes on the roller pairs create a gradient of ink layer thickness, starting from the rollers close to the ink fountain to the rollers contacting the printing plate Inking rollers.

Bei Druckunterbrechung wird eine vorbekannte Hebersperre eingesetzt und damit die Farbzufuhr zum Farbwerk unterbrochen. Gleichzeitig werden die Farbauftragwalzen vom Plattenzylinder abgestellt, so dass damit deren Kontakt zur Druckplatte unterbrochen wird. Optional hierzu kann auch mindestens eine Walzenpaarung getrennt werden, so dass zwei bzw. mehrere Walzenstränge entstehen.If the pressure is interrupted, a known lift lock is used and thus the Ink supply to the inking unit interrupted. At the same time, the inking rollers turned off from the plate cylinder, so that their contact with the printing plate is interrupted becomes. Optionally, at least one pair of rollers can also be separated, so that two or more roll strands are created.

Da das Farbwerk nicht stillgesetzt wird und weder eine Farbzufuhr erfolgt, noch dem Farbwerk Farbe entzogen wird, findet eine fortschreitende Vergleichmäßigung der Schichtdicken auf den Walzen statt. Ist das Farbwerk während der Druckunterbrechung in mehrere Walzenstränge aufgeteilt, so erfolgt die Vergleichmäßigung innerhalb dieser Walzenstränge.Since the inking unit is not stopped and there is neither an ink supply nor the Inking ink is withdrawn, finds a progressive equalization of the Layer thicknesses take place on the rollers. Is the inking unit during the printing interruption divided into several roll strands, the equalization takes place within them Rolling strands.

Durch eine nicht näher beschriebene Einrichtung wird die Zeit der Druckunterbrechung erfasst und einer ebenfalls nicht näher beschriebenen, mit einer Recheneinheit verbundenen Steuerung zugeführt. In der Steuerung sind neben maschinenbezogenen Daten, wie Anzahl der Walzen, Durchmesser der Walzen, Anzahl und Ort der Walzentrennung und dgl., auch jobbezogene Daten niedergelegt bzw. werden dort erfasst. Dazu gehört insbesondere die Länge der Druckunterbrechung sowie der Farbbedarf des aktuellen DruckmotivsBy means of a device not described in detail, the time of the printing interruption detected and connected to a computing unit, also not described in detail Control fed. In addition to machine-related data, such as number of rolls, diameter of the rolls, number and location of the roll separation and the like, also job-related data is recorded or recorded there. To include the length of the print interruption and the color requirements of the current one print motif

Wird der Druck fortgeführt, so wird in einem ersten Schritt die Hebersperre entaktiviert. Dadurch wird das Farbwerk wieder mit Farbe versorgt. Beim Vorhandensein einer Walzentrennung wird diese aufgehoben. Im farbkastennahen Bereich sind weit weniger Walzenpaarungen angeordnet, so dass hier, bedingt durch die geringere Anzahl von Farbspaltvorgängen, sich an diesen Walzen eine größere Farbschichtdicke aufbaut als an den plattenzylindernahen Walzen.If the pressure is continued, the lifter lock is deactivated in a first step. This provides the inking unit with color again. If there is one This separation is lifted. In the area near the ink fountain there are far fewer Roller pairs arranged so that here, due to the smaller number of Ink splitting processes, a larger ink layer thickness builds up on these rollers than on the rollers near the plate cylinders.

Aus den maschinenbezogenen und den jobbezogenen Daten wird der Zeitpunkt berechnet, zu dem sich ein fortdrucknahes Farbschichtengefälle auf den farbkastennahen Walzen ausgebildet hat. Dabei wird insbesondere auch berücksichtigt, ob Farbstrangtrennungen vorhanden sind. The time is calculated from the machine-related and job-related data, to which there is a gradient of ink layers close to the production on the ink box near Has trained rollers. In particular, it is also taken into account whether color strand separations available.

Ist dieser Zeitpunkt erreicht, wird der Bogenlauf zugeschaltet.If this time is reached, the sheet run is switched on.

In einer weiteren Ausführungsform der Erfindung wird mit dem Zeitpunkt der Inbetriebnahme der Hebertaktung auch das Feuchtwerk zugeschaltet. Das bewirkt bei einigen Jobs eine schnellere Einstellung des Farbe/Feuchtwasser-Gleichgewichts. Ferner ist es auch möglich, den Zeitpunkt des Zuschaltens des Feuchtwerkes zwischen den Zeitpunkt des Zuschaltens des Farbhebers und den Beginn des Bogenlaufs zu legen. Der Zeitpunkt für den Einsatz des Feuchtwerks lässt sich ebenso wie der Zeitpunkt des Einsatzes des Farbhebers aus den durch die Steuerung bereitgestellten maschinenbezogenen und jobbezogenen Daten berechnen.In a further embodiment of the invention, the time of commissioning the dampening system is also activated during the stroke cycle. It does that for some Jobs a faster adjustment of the ink / fountain solution balance. Furthermore is it is also possible to switch on the dampening unit between the time switching on the ink lifter and starting the sheet run. The The time for using the dampening system can be as well as the time of use the color lifter from the machine-related provided by the control and calculate job-related data.

Claims (6)

Verfahren zum Anfahren des Fortdrucks nach einer Druckunterbrechung, bei dem während Druckprozesses dem Plattenzylinder einer Druckmaschine Farbe zugeführt wird, derart, dass die in dem Farbkasten bevorratete Farbe über einen intermittierenden Farbheber auf ein aus mehreren Walzen bestehendes, dem Plattenzylinder zugeordnetes Farbwerk übertragen wird und dem Plattenzylinder während des Druckes über ein Feuchtwerk Feuchtwasser zugeführt wird, wobei während der Druckunterbrechung die Hebertaktung stillgesetzt, die Farbzufuhr vom Farbwerk zum Plattenzylinder sowie der Bogenlauf unterbrochen und zur Wiederaufnahme des Druckprozesses nach der Druckunterbrechung der Farbheber zugeschaltet wird, wobei der Farbheber vor dem Zuschalten des Bogenlaufs eine vorbestimmte Anzahl Hebertakte zur Übertragung von Farbe auf eine erste Walze des Farbwerkes ausführt und bei Bedarf das Feuchtwerk zugeschaltet wird.Process for starting production after a print interruption, at the color of the plate cylinder of a printing press during the printing process is supplied such that the color stored in the ink fountain via a intermittent ink lifter on a multi-roller, the Inking unit assigned to the plate cylinder is transferred and the plate cylinder fountain solution is fed during printing via a dampening system, wherein during the interruption of printing, the lifting stroke stopped, the ink supply from the inking unit to the plate cylinder and the sheet path interrupted and to Resumption of the printing process after the ink lifter has been interrupted is switched on, the ink lifter before switching on the sheet run a predetermined number of lifter clocks for transferring color to one executes the first roller of the inking unit and switches on the dampening unit if necessary becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Ermittlung der vor Beginn des Bogenlaufs erforderlichen Anzahl Farbheber-Takte in Abhängigkeit von der Länge der Druckunterbrechung erfolgt.A method according to claim 1, characterized in that the determination of the number of inking strokes required before the start of sheet travel is carried out as a function of the length of the printing interruption. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Ermittlung der vor Beginn des Bogenlaufs erforderlichen Anzahl Farbheber-Takte in Abhängigkeit vom Farbbedarf des zu druckenden Motivs erfolgt.A method according to claim 1, characterized in that the determination of the number of ink lifter cycles required before the start of the sheet run is carried out as a function of the color requirement of the motif to be printed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass im Farbwerk mindestens an einer Stelle eine Trennung der Walzen erfolgt.A method according to claim 1, characterized in that the rollers are separated at least at one point in the inking unit. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Wahl der Anzahl der Takte des Farbhebers in Abhängigkeit der durch die Walzentrennung vorhandener Farbstränge erfolgt.A method according to claim 4, characterized in that the choice of the number of cycles of the ink lifter is made depending on the color strands present by the roller separation. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass mit Zuschaltung des Farbhebers die Walzentrennung aufgehoben wird.A method according to claim 1, characterized in that the roller separation is canceled when the ink lifter is switched on.
EP20030010329 2002-06-07 2003-05-08 Method for restarting the printing after an interruption Revoked EP1369234B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10225244.0A DE10225244B4 (en) 2002-06-07 2002-06-07 Method for starting the printing after a print interruption
DE10225244 2002-06-07

Publications (2)

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EP1369234A1 true EP1369234A1 (en) 2003-12-10
EP1369234B1 EP1369234B1 (en) 2007-03-07

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EP20030010329 Revoked EP1369234B1 (en) 2002-06-07 2003-05-08 Method for restarting the printing after an interruption

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DE (2) DE10225244B4 (en)

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JP2005035041A (en) * 2003-07-16 2005-02-10 Ryobi Ltd Method for supplying ink to printing machine

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JPS5851154A (en) * 1981-09-22 1983-03-25 Mitsubishi Heavy Ind Ltd Ink supply device
DD221690A1 (en) 1983-12-22 1985-05-02 Polygraph Leipzig ADJUSTMENT AND STOPPING DEVICE FOR COLOR WORKING POWERS IN PRINTING MACHINES
EP0450155A1 (en) * 1990-04-05 1991-10-09 MAN Roland Druckmaschinen AG Humidification and inking method for a printing plate positioned on a plate cylinder
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
DE4439144A1 (en) 1994-11-03 1996-05-09 Roland Man Druckmasch Rotary printing machine inking mechanism
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200261A1 (en) 2017-01-10 2018-07-12 Koenig & Bauer Ag Method for starting a printing press
DE102017200261B4 (en) 2017-01-10 2019-01-03 Koenig & Bauer Ag Method for starting a printing press

Also Published As

Publication number Publication date
DE10225244B4 (en) 2016-02-04
DE50306720D1 (en) 2007-04-19
EP1369234B1 (en) 2007-03-07
DE10225244A1 (en) 2003-12-18

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