EP0705692B1 - Method and means for converting the inking device of a printing machine - Google Patents
Method and means for converting the inking device of a printing machine Download PDFInfo
- Publication number
- EP0705692B1 EP0705692B1 EP95113219A EP95113219A EP0705692B1 EP 0705692 B1 EP0705692 B1 EP 0705692B1 EP 95113219 A EP95113219 A EP 95113219A EP 95113219 A EP95113219 A EP 95113219A EP 0705692 B1 EP0705692 B1 EP 0705692B1
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- European Patent Office
- Prior art keywords
- printing
- ink
- rollers
- roller
- distributor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/15—Devices for moving vibrator-rollers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S101/00—Printing
- Y10S101/38—Means for axially reciprocating inking rollers
Definitions
- the invention relates to a method and an apparatus for converting an inking unit of printing presses, in which areas with different ink layer thicknesses are present on an ink fountain roller transversely to the printing direction, which are applied to a printing form via a number of inking unit rollers and inking rollers and in the inking unit rollers are designed as axially moving friction rollers which periodically perform an axial stroke.
- DE 41 40 048 A1 proposes to interrupt the drive of a distribution roller via a clutch, so that the periodic axial movement of the distribution roller can be stopped.
- the disadvantage of this known embodiment is the fact that it causes problems to couple the friction rollers in the correct phase again when the printing unit continues to run, if, for. B. the Print interruption has ended and paper is fed again. If several friction rollers are present in one inking unit, they normally do not perform their axial stroke synchronously, so that a considerable amount of control is required in order to achieve the previously set axial stroke again. A change in the axial stroke movement of the individual friction rollers would have an immediate effect on the printing result and lead to a harmful change in color.
- the object of the present invention to keep the lateral ink flow in the inking unit as constant as is necessary for the exact inking of the printing form even with widely differing target densities or when printing is interrupted without problems with lateral rubbing.
- the method for converting an inking unit according to the present invention is characterized in that in the production of printed copies with a relatively uniform ink application across the printing direction, the friction rollers are set to the respectively intended full stroke and in the production of printed copies with a crosswise to the printing direction in some areas strongly changing ink application or in the event of a brief interruption in printing, the stroke of at least the first distribution roller, which follows after the ink fountain roller, is changed to a low value close to 0 while the printing unit continues to run.
- the friction roller thus converted continues to perform a short stroke, e.g. B. of 1 mm, so that there is no change in the phase position of the lateral movement of the friction roller.
- a device for carrying out the method is characterized in that the axial stroke of the distribution roller takes place via an eccentrically offset roller mounted on the journal of the distribution roller, which can be moved between two parallel running surfaces mounted on the machine side frame, that the roller has a rotary drive, so that their eccentric arrangement axially moves the friction roller back and forth and that the distance of at least one of the two parallel running surfaces to the opposite running surface can be increased. Due to the larger distance between the two treads, the eccentrically mounted roller rotates over most of its rotary motion without transmitting a stroke to the respective friction roller. Only in the area of their turning points does the roller hit one of the two running surfaces, so that, depending on the distance, z. B. only an axial stroke of 1 mm is carried out. The distance between the two running surfaces depends on the eccentricity of the pin of the roller relative to the rotary drive and can be adjusted individually.
- Fig. 1 is a diagram of the color distribution of any four zones, the individual zones on the ink fountain z. B. are set to the values 8.80, 10.80, 0.60 and 10.80 because the area coverage in the zones is very different.
- a color profile of 0.98, 0.98, 1.17 and 0.96 is then created on the printed sheet.
- the value of 1.17 in the zone with the lowest ink supply of 0.60 arises due to the lateral rubbing, in particular of the upper friction rollers, so that the ink layer thickness of 1.17 in no way corresponds to the ink requirement in this zone.
- This phenomenon occurs in the normal printing process, but especially when e.g. B. the printing is briefly interrupted, so that a longer running-in phase with appropriate markup is required when the inking rollers are re-positioned on the printing plate in order to restore an ink layer thickness corresponding to the ink requirements in the zones.
- the setting of the individual color zones on the ink fountain is also made to the values 8.80, 10.80, 0.60 and 10.80.
- at least the first distribution roller after the ink fountain roller is set to a low value close to 0. It is hereby achieved that the weak zone with the value 0.60 from the two adjacent zones with the values 10.80 does not receive as much ink, so that in this zone only a layer of ink layer with the value 1.02 is achieved on the printed sheet. There is therefore no overstaining, but a layer thickness in the halftone dot, which enables exact printing after just a few sheets.
- a friction roller (not shown) of an inking unit, a worm 3 and a worm wheel 4 are arranged in a gear box 2, the worm 3 being fastened on the journal 1 of the friction roller.
- the gearbox 2 is mounted on the knuckle 1 of the friction roller via ball bearings 5 and a needle bearing 6 and moves back and forth with the knuckle 1 of the friction roller.
- a support pin 7 is fastened laterally to the gearbox 2 parallel to the steering knuckle 1 and moves back and forth in a bearing 8 which is fastened in a bearing plate 9. (Fig. 3)
- crank pin 10 shows the gearbox 2 in a cross section, with the worm wheel 4 mounted on a crank pin 10.
- the crank pin 10 is rotatably mounted in the gear box 2 via a ball bearing 11 and a needle bearing 12.
- the crank pin 10 carries a roller 14 mounted on a roller pin 13.
- the roller pin 13 can be slidably mounted on the flange 15 so that the degree of eccentricity e can be adjusted.
- the lateral stroke of the friction roller which corresponds to twice the dimension e, can be adapted to the requirements given in printing.
- Fig. 5 shows the roller 14 between two parallel treads 16, 17 of which the tread 17 on one Carrier 18 is provided, which is attached to the machine side frame 19.
- Two bearing journals 20 are fastened in the carrier 18 (FIG. 6), on which a sliding body 21 is axially displaceable, on which the second running surface 16 is provided.
- the displacement of the sliding body 21 can, for. B. done via an actuator 22 which is fixed in the carrier 18.
- the motor pin 23, which is connected to the sliding body 21 via a ball bearing 24, can be moved so far to the left in the direction of the arrow that the sliding body 21 assumes the position shown in broken lines. (Figs. 5 and 6)
- the enlarged distance between the two treads 16, 17 is drawn in solid lines, this distance corresponding to the dimension a.
- the dimension a can e.g. B. twice the eccentricity e plus once the diameter of the roller 14 minus 1 mm.
- the axial stroke of the friction roller would be 1 mm. This stroke arises from the fact that the roller 14 is shifted from its solid upper position after a rotary movement of 180 ° in the position shown in dash-dotted lines relative to the solid surface 16 by 1 mm, so that the friction roller executes a corresponding stroke.
- the two running surfaces 16 and 17 are pushed together to the dimension b, which corresponds to the diameter of the roller 14.
- the roller 14 When it rotates, the roller 14 thus moves the friction roller after 180 ° so that it performs the stroke twice e.
- the full stroke of the crank-mounted roller 14 is thus transferred to the friction roller, while the enlarged Distance a of the treads 16, 17 according to the stroke z. B. has been reduced to 1 mm.
- the lateral rubbing is changed to a value close to 0, so that there is no unwanted color balance between zones with high color requirements and zones with low color requirements.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Umstellen eines Farbwerks von Druckmaschinen, bei dem auf einer Farbkastenwalze quer zur Druckrichtung Bereiche mit unterschiedlichen Farbschichtdicken vorhanden sind, die über eine Anzahl Farbwerkswalzen und Farbauftragwalzen entsprechend dem zonalen Farbbedarf auf eine Druckform aufgebracht werden und bei dem Farbwerkswalzen als axial bewegte Reibwalzen ausgebildet sind, die periodisch einen Axialhub ausführen.The invention relates to a method and an apparatus for converting an inking unit of printing presses, in which areas with different ink layer thicknesses are present on an ink fountain roller transversely to the printing direction, which are applied to a printing form via a number of inking unit rollers and inking rollers and in the inking unit rollers are designed as axially moving friction rollers which periodically perform an axial stroke.
Bei Druckformen, die unterschiedliche Flächendeckungen in den einzelnen Farbzonen aufweisen, besteht das Problem, daß die Solldichte der Farbe in den Zonen, die nur eine sehr geringe Flächendeckung aufweisen, durch die Nachbarzonen mit einer hohen Flächendeckung überschritten wird und ein ungewollter Ausgleich erfolgt. Das selbe Problem tritt auf, wenn bei laufender Maschine kurze Druckunterbrechungen erforderlich sind, bei denen die Papierzufuhr und Farbzufuhr kurzzeitig abgestellt wird und das Farbwerk weiter dreht. In diesen Situationen ergibt sich über die Breite des Farbwerks ein Farbprofil, das durch die seitliche Verreibung soweit verändert wird, daß es mit dem tatsächlichen Farbbedarf auf der Druckplatte kaum korreliert.With printing forms that have different area coverage in the individual ink zones, there is the problem that the target density of the ink in the zones that have only a very small area coverage is exceeded by the neighboring zones with a high area coverage and an unwanted compensation takes place. The same problem arises when brief interruptions in printing are required while the machine is running, in which the paper feed and ink feed are temporarily stopped and the inking unit continues to rotate. In these situations there is a color profile across the width of the inking unit, which is changed by the lateral rubbing to such an extent that it hardly correlates with the actual ink requirement on the printing plate.
Um diese Erscheinungen zu beseitigen, schlägt die DE 41 40 048 A1 vor, den Antrieb einer Reibwalze über eine Schaltkupplung zu unterbrechen, so daß die periodische Axialbewegung der Reibwalze stillsetzbar ist. Der Nachteil dieser bekannten Ausführung ist darin zu sehen, daß es Probleme bereitet, die Reibwalzen bei weiterlaufendem Druckwerk wieder phasenrichtig einzukuppeln, wenn z. B. die Druckunterbrechung beendet ist und wieder eine Papierzufuhr erfolgt. Sind mehrere Reibwalzen in einem Farbwerk vorhanden, so führen diese ihren Axialhub normalerweise nicht synchron aus, so daß ein erheblicher Steueraufwand erforderlich ist, um den zuvor eingestellten Axialhub wieder zu erreichen. Eine Änderung der axialen Hubbewegung der einzelnen Reibwalzen würde sich unmittelbar im Druckergebnis auswirken und zu einer schädlichen Farbveränderung führen.In order to eliminate these phenomena, DE 41 40 048 A1 proposes to interrupt the drive of a distribution roller via a clutch, so that the periodic axial movement of the distribution roller can be stopped. The disadvantage of this known embodiment is the fact that it causes problems to couple the friction rollers in the correct phase again when the printing unit continues to run, if, for. B. the Print interruption has ended and paper is fed again. If several friction rollers are present in one inking unit, they normally do not perform their axial stroke synchronously, so that a considerable amount of control is required in order to achieve the previously set axial stroke again. A change in the axial stroke movement of the individual friction rollers would have an immediate effect on the printing result and lead to a harmful change in color.
Ausgehend von diesen Gegebenheiten ist es die Aufgabe der vorliegenden Erfindung, den seitlichen Farbfluß im Farbwerk so konstant zu halten, wie er zum exakten Einfärben der Druckform auch bei stark unterschiedlichen Solldichten oder bei Druckunterbrechungen erforderlich ist, ohne daß Probleme bei der seitlichen Verreibung auftreten.Based on these circumstances, it is the object of the present invention to keep the lateral ink flow in the inking unit as constant as is necessary for the exact inking of the printing form even with widely differing target densities or when printing is interrupted without problems with lateral rubbing.
Das Verfahren zum Umstellen eines Farbwerks gemäß vorliegender Erfindung ist dadurch gekennzeichnet, daß bei der Herstellung von Druckexemplaren mit einem quer zur Druckrichtung relativ gleichmäßigen Farbauftrag die Reibwalzen auf den jeweils vorgesehenen vollen Hub eingestellt sind und daß bei der Herstellung von Druckexemplaren mit einem quer zur Druckrichtung bereichsweise stark wechselnden Farbauftrag oder bei kurzzeitiger Druckunterbrechung der Hub mindestens der ersten Reibwalze, die nach der Farbkastenwalze folgt, bei weiterlaufendem Druckwerk auf einem geringen wert nahe 0 umgestellt wird. Die so umgestellte Reibwalze führt weiterhin einen geringen Hub aus, z. B. von 1 mm, so daß keinerlei Veränderung der Phasenlage der seitlichen Bewegung der Reibwalze erfolgt. Weiterhin ist es nicht erforderlich, bei laufendem Druckwerk, den Antrieb für den seitlichen Hub einzukuppeln, so daß auch keine Drehschwankungen im Druckwerk auftreten können. Somit entfällt jedes Nachjustieren der Farbführung. Ein weiterer Vorteil ist, daß der Drucker jede Stellung des Reibwalzenhubes für die normalen Druckarbeiten einstellen kann.The method for converting an inking unit according to the present invention is characterized in that in the production of printed copies with a relatively uniform ink application across the printing direction, the friction rollers are set to the respectively intended full stroke and in the production of printed copies with a crosswise to the printing direction in some areas strongly changing ink application or in the event of a brief interruption in printing, the stroke of at least the first distribution roller, which follows after the ink fountain roller, is changed to a low value close to 0 while the printing unit continues to run. The friction roller thus converted continues to perform a short stroke, e.g. B. of 1 mm, so that there is no change in the phase position of the lateral movement of the friction roller. Furthermore, it is not necessary to couple the drive for the lateral stroke when the printing unit is running, so that no rotational fluctuations can occur in the printing unit. This eliminates the need to readjust the color guide. Another advantage is that the printer has every Adjust the position of the roller stroke for normal printing.
Eine Vorrichtung zur Durchführung des Verfahrens ist dadurch gekennzeichnet, daß der axiale Hub der Reibwalse über eine auf dem Achszapfen der Reibwalze gelagerte, exzentrisch versetzte Rolle erfolgt, die zwischen zwei parallel angeordneten, am Maschinenseitengestell gelagerte Laufflächen bewegbar ist, daß die Rolle einen Drehantrieb aufweist, so daß deren exzentrische Anordnung die Reibwalze axial hin- und herbewegt und daß der Abstand mindestens einer der beiden parallel angeordneten Laufflächen zur gegenüberliegenden Lauffläche vergrößerbar ist. Durch den größeren Abstand zwischen den beiden Laufflächen dreht sich die exzentrisch gelagerte Laufrolle über den größten Teil ihrer Drehbewegung, ohne daß sie einen Hub auf die jeweilige Reibwalze überträgt. Nur im Bereich ihrer Umkehrpunkte trifft die Laufrolle auf eine der beiden Laufflächen auf, so daß je nach Abstand z. B. nur ein axialer Hub von 1 mm durchgeführt wird. Der Abstand der beiden Laufflächen richtet sich hierbei nach der jeweils eingestellten Exzentrizität des Zapfens der Laufrolle gegenüber dem Drehantrieb und läßt sich individuell einstellen.A device for carrying out the method is characterized in that the axial stroke of the distribution roller takes place via an eccentrically offset roller mounted on the journal of the distribution roller, which can be moved between two parallel running surfaces mounted on the machine side frame, that the roller has a rotary drive, so that their eccentric arrangement axially moves the friction roller back and forth and that the distance of at least one of the two parallel running surfaces to the opposite running surface can be increased. Due to the larger distance between the two treads, the eccentrically mounted roller rotates over most of its rotary motion without transmitting a stroke to the respective friction roller. Only in the area of their turning points does the roller hit one of the two running surfaces, so that, depending on the distance, z. B. only an axial stroke of 1 mm is carried out. The distance between the two running surfaces depends on the eccentricity of the pin of the roller relative to the rotary drive and can be adjusted individually.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt.An embodiment of the invention is shown schematically in the drawings.
Es zeigt:
- Fig. 1
- ein Schema der Farbverteilung in verschiedenen Zonen,
- Fig. 2
- ein Schema der Farbverteilung gemäß vorliegender Erfindung,
- Fig. 3
- einen Längsschnitt durch ein Getriebe zum Antreiben der Rolle,
- Fig. 4
- einen Querschnitt durch das Getriebe,
- Fig. 5
- die Rolle zwischen den beiden Laufflächen,
- Fig. 6
- die Lagerung der beiden Laufflächen,
- Fig. 7
- ein Schema der beiden Laufflächen in abgestellter und angestellter Stellung.
- Fig. 1
- a scheme of the color distribution in different zones,
- Fig. 2
- a diagram of the color distribution according to the present invention,
- Fig. 3
- a longitudinal section through a gear for driving the roller,
- Fig. 4
- a cross section through the transmission,
- Fig. 5
- the role between the two treads,
- Fig. 6
- the storage of the two treads,
- Fig. 7
- a diagram of the two treads in the parked and employed position.
In Fig. 1 ist ein Schema der Farbverteilung von vier beliebigen Zonen, wobei die einzelnen Zonen am Farbkasten z. B. auf die Werte 8,80, 10,80, 0,60 und 10,80 eingestellt sind, weil die Flächendeckungen in den Zonen sehr unterschiedlich sind. Durch das Spalten der Farbe und die seitliche Verreibung im Farbwerk entsteht sodann ein Farbprofil auf dem Druckbogen von 0,98, 0,98, 1,17 und 0,96. Der Wert von 1,17 in der Zone mit der geringsten Farbzufuhr von 0,60 entsteht bei bisherigen Farbwerken durch die seitliche Verreibung insbesondere der oberen Reiberwalzen, so daß die Farbschichtdicke von 1,17 in keiner weise dem Farbbedarf in dieser Zone entspricht. Diese Erscheinung tritt im normalen Fortdruckprozeß auf, aber besonders auch wenn z. B. der Druck kurzzeitig unterbrochen wird, so daß beim Wiederanstellen der Farbauftragwalzen an die Druckplatte eine längere Einlaufphase mit entsprechender Markulatur benötigt wird, um in den Zonen eine dem Farbbedarf entsprechende Farbschichtdicke wieder herzustellen.In Fig. 1 is a diagram of the color distribution of any four zones, the individual zones on the ink fountain z. B. are set to the values 8.80, 10.80, 0.60 and 10.80 because the area coverage in the zones is very different. By splitting the ink and rubbing it on the side in the inking unit, a color profile of 0.98, 0.98, 1.17 and 0.96 is then created on the printed sheet. In previous inking units, the value of 1.17 in the zone with the lowest ink supply of 0.60 arises due to the lateral rubbing, in particular of the upper friction rollers, so that the ink layer thickness of 1.17 in no way corresponds to the ink requirement in this zone. This phenomenon occurs in the normal printing process, but especially when e.g. B. the printing is briefly interrupted, so that a longer running-in phase with appropriate markup is required when the inking rollers are re-positioned on the printing plate in order to restore an ink layer thickness corresponding to the ink requirements in the zones.
In Fig. 2 ist die Einstellung der einzelnen Farbzonen am Farbkasten ebenfalls auf die werte 8,80, 10,80, 0,60 und 10,80 vorgenommen. Bei diesem Schema ist jedoch mindestens die erste Reibwalze nach der Farbkastenwalze auf einen geringen wert nahe 0 eingestellt. Hiermit wird erreicht, daß die schwache Zone mit dem Wert 0,60 von den beiden benachbarten Zonen mit den Werten 10,80 nicht so viel Farbe zugeführt bekommt, so daß in dieser Zone auf dem Druckbogen lediglich eine Farbschichtdicke mit dem wert 1,02 erreicht wird. Es findet somit keine überfärbung statt, sondern eine Schichtdicke im Rasterpunkt, die nach wenigen Bogen bereits einen exakten Druck ermöglicht.In Fig. 2, the setting of the individual color zones on the ink fountain is also made to the values 8.80, 10.80, 0.60 and 10.80. In this scheme, however, at least the first distribution roller after the ink fountain roller is set to a low value close to 0. It is hereby achieved that the weak zone with the value 0.60 from the two adjacent zones with the values 10.80 does not receive as much ink, so that in this zone only a layer of ink layer with the value 1.02 is achieved on the printed sheet. There is therefore no overstaining, but a layer thickness in the halftone dot, which enables exact printing after just a few sheets.
Auf dem Achsschenkel 1, einer nicht dargestellten Reibwalze eines Farbwerks ist in einem Getriebekasten 2 eine Schnecke 3 und ein Schneckenrad 4 angeordnet, wobei die Schnecke 3 auf dem Achszapfen 1 der Reibwalze befestigt ist. Der Getriebekasten 2 ist über Kugellager 5 und ein Nadellager 6 auf dem Achsschenkel 1 der Reibwalze gelagert und bewegt sich mit dem Achsschenkel 1 der Reibwalze hin und her.On the steering knuckle 1, a friction roller (not shown) of an inking unit, a
Um ein Mitdrehen des Getriebekastens 2 zu verhindern, ist parallel zum Achsschenkel 1 ein Stützzapfen 7 seitlich am Getriebekasten 2 befestigt, der sich in einer Lagerung 8 hin- und herbewegt, die in einem Lagerschild 9 befestigt ist. (Fig. 3)In order to prevent the
In Fig. 4 ist der Getriebekasten 2 in einem Querschnitt gezeigt, mit einer Lagerung des Schneckenrades 4 auf einem Kurbelzapfen 10. Der Kurbelzapfen 10 ist über ein Kugellager 11 und ein Nadellager 12 im Getriebekasten 2 drehbar gelagert. An einem Ende trägt der Kurbelzapfen 10 eine auf einem Rollenzapfen 13 gelagerte Rolle 14. Bei dieser Ausführung kann der Rollenzapfen 13 verschiebbar an dem Flansch 15 gelagert sein, so daß das Maß der Exzentrizität e einstellbar ist. Hierdurch läßt sich der seitliche Hub der Reibwalze, der dem doppelten Maß e entspricht den beim Druck gegebenen Erfordernissen anpassen.4 shows the
Fig. 5 zeigt die Rolle 14 zwischen zwei parallel angeordneten Laufflächen 16, 17 von denen die Lauffläche 17 an einem Träger 18 vorgesehen ist, der am Maschinenseitengestell 19 befestigt ist. Im Träger 18 sind zwei Lagerzapfen 20 befestigt (Fig. 6), auf denen ein Schiebekörper 21 axial verschiebbar ist, an dem die zweite Lauffläche 16 vorgesehen ist. Durch Verschieben des Schiebekörpers läßt sich der Abstand zwischen den beiden Laufflächen 16 und 17 von einem Maß das dem Durchmesser der Rolle 14 entspricht bis in die strichpunktiert gezeichnete Stellung vergrößern. Das Verschieben des Schiebekörpers 21 kann z. B. über einen Stellmotor 22 erfolgen, der im Träger 18 befestigt ist. Der Motorzapfen 23, der über ein Kugellager 24 mit dem Schiebekörper 21 verbunden ist, läßt sich in Pfeilrichtung so weit nach links bewegen, daß der Schiebekörper 21 die strichpunktiert gezeichnete Stellung einnimmt. (Fig. 5 und 6)Fig. 5 shows the
In Fig. 7 ist schematisch der vergrößerte Abstand der beiden Laufflächen 16, 17 ausgezogen gezeichnet, wobei dieser Abstand dem Maß a entspricht. Das Maß a kann z. B. zweimal der Exzentrizität e plus einmal dem Durchmesser der Rolle 14 minus 1 mm betragen. In diesem Falle wäre der axiale Hub der Reibwalze 1 mm. Dieser Hub entsteht dadurch, daß die Rolle 14 von ihrer ausgezogen gezeichneten oberen Position nach einer Drehbewegung von 180° in der strichpunktiert gezeichnete Stellung gegenüber der ausgezogen gezeichnete Laufflache 16 um 1 mm verschoben wird, so daß die Reibwalze einen entsprechenden Hub ausführt. In dem rechten Schema sind die beiden Laufflächen 16 und 17 bis auf das Maß b zusammengeschoben, das dem Durchmesser der Laufrolle 14 entspricht. Bei ihrer Drehbewegung verschiebt somit die Rolle 14 nach 180° die Reibwalze so, daß sie den Hub zweimal e ausführt. In dieser Stellung der Laufflächen 16, 17 wird somit der volle Hub der kurbelförmig gelagerten Rolle 14 auf die Reibwalze übertragen, während bei dem vergrößerten Abstand a der Laufflächen 16, 17 gemäß der im linken Schema der Hub z. B. bis auf 1 mm verkleinert wurde. Hierdurch wird die seitliche Verreibung auf einen wert nahe 0 umgestellt, so daß kein ungewollter Farbausgleich zwischen Zonen mit hohem Farbbedarf und Zonen mit geringem Farbbedarf stattfindet.In Fig. 7, the enlarged distance between the two
- 11
- AchsschenkelSteering knuckle
- 22nd
- GetriebekastenGear box
- 33rd
- Schneckeslug
- 44th
- SchneckenradWorm wheel
- 55
- Kugellagerball-bearing
- 66
- NadellagerNeedle bearing
- 77
- StützzapfenSupport pin
- 88th
- Lagerungstorage
- 99
- LagerschildEnd shield
- 1010th
- KurbelzapfenCrank pin
- 1111
- Kugellagerball-bearing
- 1212th
- NadellagerNeedle bearing
- 1313
- RollenzapfenRoller pin
- 1414
- RollerScooter
- 1515
- Flanschflange
- 1616
- LaufflächeTread
- 1717th
- LaufflächeTread
- 1818th
- Trägercarrier
- 1919th
- MaschinenseitengestellMachine side frame
- 2020th
- LagerzapfenBearing journal
- 2121
- SchiebekörperSliding body
- 2222
- StellmotorServomotor
- 2323
- MotorzapfenEngine journal
- 2424th
- Kugellagerball-bearing
Claims (3)
- Method for resetting an inking unit of printing machines, in which, on an ink fountain roller, there are transverse to the printing direction regions with different ink layer thicknesses which are applied to a printing forme according to the zonal ink requirement via a number of inking unit rollers and ink applicator rollers, and in which inking unit rollers are designed as axially moved distributor rollers which periodically execute an axial stroke,
characterized- in that, during the production of printed copies with an ink application which is relatively uniform transversely to the printing direction, the distributor rollers are set at the full stroke provided in each case, and- in that, during the production of printed copies with an ink application which changes sharply in regions transversely to the printing direction or in the event of a brief interruption in printing, the stroke of at least the first distributor roller, which follows after the ink fountain roller, is reset at a low value near 0 while the printing unit continues to run. - Device for carrying out the method according to Claim 1, having an ink fountain roller, a number of inking unit rollers and ink applicator rollers for transporting printing ink onto a printing forme, inking unit rollers being designed as axially moved distributor rollers which periodically execute an axial stroke,
characterized- in that the axial stroke of the distributor roller takes place via an eccentrically (e) offset roll (14) which is mounted on the shaft journal (1) of the distributor roller and which is movable between two running surfaces (16, 17) arranged in parallel and mounted on the machine side stand (19),- in that the roll (14) has a rotary drive, so that its eccentric arrangement (e) moves the distributor roller axially back and forth, and- in that the distance (b) between at least one of the two running surfaces (16, 17) arranged in parallel and the opposite running surface can be increased. - Device according to Claim 2, characterized in that one running surface (16) is provided on a sliding body (21) which is mounted on bearing journals (20) so as to be displaceable via an actuating means (22), the opposite running surface (17) being provided on a carrier (18) which is fastened to the machine side stand (19).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4435991 | 1994-10-08 | ||
| DE4435991A DE4435991C2 (en) | 1994-10-08 | 1994-10-08 | Method and device for keeping ink layer thicknesses constant in an inking unit of a printing press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0705692A1 EP0705692A1 (en) | 1996-04-10 |
| EP0705692B1 true EP0705692B1 (en) | 1997-12-29 |
Family
ID=6530273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95113219A Expired - Lifetime EP0705692B1 (en) | 1994-10-08 | 1995-08-23 | Method and means for converting the inking device of a printing machine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5701817A (en) |
| EP (1) | EP0705692B1 (en) |
| JP (1) | JP3889824B2 (en) |
| DE (2) | DE4435991C2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29612159U1 (en) * | 1996-07-12 | 1996-08-29 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Device for quickly creating a production status of a printing unit |
| DE19756077A1 (en) * | 1997-12-17 | 1999-06-24 | Heidelberger Druckmasch Ag | Method for operating a rotary printing press and device in a rotary printing press |
| DE19815293A1 (en) * | 1998-04-06 | 1999-10-07 | Heidelberger Druckmasch Ag | Printing press and method for operating a printing press |
| DE10028317A1 (en) | 1999-06-21 | 2000-12-28 | Heidelberger Druckmasch Ag | Method of controlling ink supply in a color printer, comprises using color roller to transfer the ink using a rubbing stroke motion |
| DE10003026B4 (en) * | 2000-01-25 | 2004-03-25 | Koenig & Bauer Ag | Drive for a distribution roller |
| US6612233B2 (en) * | 2000-02-18 | 2003-09-02 | Mitsubishi Heavy Industries, Ltd. | Sheet feed offset press |
| ATE438510T1 (en) * | 2000-06-30 | 2009-08-15 | Komori Printing Mach | CONTROL FOR THE COLOR DEVICE OF A PRINTING PRESS |
| DE10114250A1 (en) * | 2001-03-22 | 2002-09-26 | Fischer & Krecke Gmbh & Co | printing process |
| DE102006059015A1 (en) * | 2006-12-14 | 2008-06-19 | Heidelberger Druckmaschinen Ag | Method e.g. for reducing micro streaks in production of print product in printing machine, involves having color whose operating condition has several influencing adjustable parameters |
| DE102008034249B4 (en) | 2008-07-23 | 2013-11-21 | manroland sheetfed GmbH | Method for operating an inking unit of a printing unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5672960A (en) * | 1979-11-19 | 1981-06-17 | Tokyo Kikai Seisakusho:Kk | Vibrator device of ink cylinder in rotary printer |
| DE3243582C2 (en) * | 1982-11-25 | 1984-09-27 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Device for changing the axial stroke of a distribution roller in a printing machine |
| DE3434646C1 (en) * | 1984-09-21 | 1985-11-07 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Lifter inking unit of a printing press |
| EP0403861B1 (en) * | 1989-06-19 | 1994-08-31 | Heidelberger Druckmaschinen Aktiengesellschaft | Method of rapid attainment of print-readiness |
| DE4004056A1 (en) * | 1990-02-10 | 1991-08-14 | Roland Man Druckmasch | Inking control esp. for offset rotary printing machine - applies colour pattern corrections before addn. of values extracted by scanning system from original colour documents |
| DE4140048C2 (en) * | 1991-12-05 | 1995-09-21 | Roland Man Druckmasch | Inking unit of a printing press, in particular sheet-fed offset printing press |
-
1994
- 1994-10-08 DE DE4435991A patent/DE4435991C2/en not_active Expired - Fee Related
-
1995
- 1995-08-23 DE DE59501161T patent/DE59501161D1/en not_active Expired - Fee Related
- 1995-08-23 EP EP95113219A patent/EP0705692B1/en not_active Expired - Lifetime
- 1995-10-06 US US08/549,193 patent/US5701817A/en not_active Expired - Lifetime
- 1995-10-09 JP JP26140595A patent/JP3889824B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3889824B2 (en) | 2007-03-07 |
| DE4435991A1 (en) | 1996-04-11 |
| JPH08174800A (en) | 1996-07-09 |
| DE4435991C2 (en) | 1998-02-12 |
| US5701817A (en) | 1997-12-30 |
| EP0705692A1 (en) | 1996-04-10 |
| DE59501161D1 (en) | 1998-02-05 |
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