EP0813961B1 - Offset printing device for rotary press - Google Patents
Offset printing device for rotary press Download PDFInfo
- Publication number
- EP0813961B1 EP0813961B1 EP97106619A EP97106619A EP0813961B1 EP 0813961 B1 EP0813961 B1 EP 0813961B1 EP 97106619 A EP97106619 A EP 97106619A EP 97106619 A EP97106619 A EP 97106619A EP 0813961 B1 EP0813961 B1 EP 0813961B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inking
- plate cylinder
- rollers
- peripheral speed
- offset printing
- 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.)
- Expired - Lifetime
Links
- 238000007645 offset printing Methods 0.000 title claims description 24
- 238000007639 printing Methods 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims description 33
- 238000013016 damping Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000011109 contamination Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F35/00—Cleaning arrangements or devices
- B41F35/04—Cleaning arrangements or devices for inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2235/00—Cleaning
- B41P2235/10—Cleaning characterised by the methods or devices
- B41P2235/20—Wiping devices
- B41P2235/22—Rollers
Definitions
- the invention relates to an offset printing device for a Rotary printing machine according to the preamble of claim 1.
- An offset printing device of this type is known from DE 44 23 286 A1.
- a The plate cylinder carries one for the dampening agent-free offset printing (Dry flat printing) suitable printing form, which with a corresponding Ink is colored.
- an additional application roller to the Printing form can be switched on and off.
- the additional applicator roller is in two operating positions switchable. The applicator roller is on in the first operating position the printing form and with a different peripheral speed The peripheral speed of the plate cylinder can be operated and in the second operating position the application roller is turned off from the printing form, but in the Inking unit integrated.
- a wet offset printing device is known from DE-AS 18 08 909.
- To the Removal of contaminants on the printing form is at least one applicator roller of dampening or inking units with different peripheral speeds to the peripheral speed of the plate cylinder by means of a gear train (positively) drivable.
- This procedure is for a dry offset plate, which has a non-metallic surface coating, unsuitable, because the dry planographic printing plate is opposed to a dampening agent Printing plate for offset printing is less wear resistant.
- DE-A-2 309 850 is an offset printing machine for one Rotary printing press known, the inking unit on the ink storage side Has ink roller, which with a to the peripheral speed Plate cylinder smaller circumferential speed are positively driven.
- the invention is intended to avoid torsional vibrations and doubling by due to the special peripheral speeds of the ink storage side Ink friction rollers in the gear train a tension is built up that Avoid backlash, circumferential vibrations and possibly a flank change. Notes on reducing contamination and / or using a dampening agent-free pressure plate are not to be removed.
- the object of the invention is to develop an offset printing device which the contamination that occurs during offset printing is noticeably reduced.
- all form-fit ink rollers can be operated in the inking unit with different to the peripheral speed of the plate cylinder Circumferential speed operated, the inking rollers themselves none have positive drive.
- the positively driven Ink rollers within the inking unit gradually with different ones Circumferential speeds to the plate cylinder circumferential speed driven in rotation.
- the inking unit a difference in the circumferential speeds of the positive operated ink rollers built up, which, for example, at least one, the inking roller adjacent to the plate cylinder 2% and with one of the plate cylinders most distant, e.g. the ink roller adjacent to the ink lifter in the roller train is 10% of the peripheral speed of the plate cylinder.
- the positively driven ink rollers rotate with respect to the peripheral speed of the plate cylinder, preferably in total lower peripheral speed. Alternatively, a higher differential speed is also possible permissible for the peripheral speed of the plate cylinder.
- a rotational slip forms at each roller contact point of the inking unit.
- the rotation slip is formed in particular on the inking rollers by two contact points, the first to the plate cylinder and the second to the adjacent, form-fittingly operated inking unit roller.
- the rotational slip forms the Wiping effect "which reduces the contamination (paper dust, slugs, etc.) that occurs in the inking unit. In the process, the contamination in the contact points is destroyed or noticeably reduced, so that there are no negative effects on the print quality.
- One known from the prior art This eliminates the need for dirt trap rollers.
- the intervals between the washing cycles for inking unit washing can be increased, which also saves detergent and water.
- the plastic-coated inking unit rollers, which experience has shown are susceptible to build-up, do not need to be substituted.
- a printing unit comprises a blanket cylinder 1 and a plate cylinder 2, which is a dry planographic printing plate for the waterless Offset printing.
- the plate cylinder 2 are four inking rollers 4.1 to 4.4 Assigned on and off assignable.
- the inking rollers 4.1 to 4.4 are part of it an inking unit 5 formed by a plurality of inking rollers, which the Dry flat printing plate with a suitable for waterless offset printing Ink colors. This is done in a known manner from a paint box a jack roller and a roller train of the inking unit 5 the printing ink on the Transfer the dry flat printing plate.
- the ink roller 3.4 can with 2% (analog to the ink roller 3.2) be positively driven.
- the inking rollers 3.1-3.4 have a traversing drive on.
- the transfer rollers adjacent to the inking rollers 3.1 - 3.4 (without Item number) and the inking rollers 4.1 - 4.4 are changeable.
- the mode of operation is as follows: In printing operation, the inking rollers 3.1 - 3.4 constantly with a deviating to the peripheral speed of the plate cylinder Peripheral speed driven.
- the difference in peripheral speeds is in the present example a maximum of 6% and a minimum of 2% to the Circumferential speed of the plate cylinder 2.
- the circumferential speeds the inking rollers 3.1 - 3.4 are always less than the peripheral speed of the Plate cylinder 2.
- the rotation and traversing movement of the inking rollers 3.1 - 3.4 is frictionally engaged on the adjacent rollers of the inking unit 5 transfer. In the contact points, in particular between plate cylinder 2 and the inking rollers 4.1 to 4.4. become the impurities (Dirt particles, dust, paper and paint particles) reduced.
- the printing unit according to the invention comprises a blanket cylinder 1, a plate cylinder 2, which is a printing plate for wet offset printing carries and an inking unit 5.
- the plate cylinder 2 is still a Dampening unit 6 assigned, which has a dampening roller 7 that can be turned on and off having.
- the dampening roller 7 is in a known manner with a dampener, which is immersed in a dampening solution tank.
- the damp doctor is assigned a metering roller.
- the dampening roller 7 is a bridge roller arranged switchable adjacent to the first inking roller 4.1. If necessary A further rider roller can be assigned to the dampening roller 7.
- the Inking unit 5 has form-fit drivable inking rollers 3.1 - 3.4, which are next to the rotary drive have a traversing drive.
- the ink rollers 3.1 - 3.4 neighboring transfer or inking rollers 4.1 - 4.4 are frictional in contact with the inking rollers 3.1 - 3.4.
- the inking roller 3.3 as from Plate cylinder most distant form-fit drivable roller with the largest Difference in the peripheral speed to the plate cylinder peripheral speed operated.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
- Testing Of Balance (AREA)
Abstract
Description
Die Erfindung betrifft eine Offsetdruckvorrichtung für eine
Rotationsdruckmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to an offset printing device for a
Rotary printing machine according to the preamble of
Eine Offsetdruckvorrichtung dieser Art ist aus der DE 44 23 286 A1 bekannt. Ein Plattenzylinder trägt dabei eine für den feuchtmittelfreien Offsetdruck (Trockenflachdruck) geeignete Druckform, welche mit einer entsprechenden Druckfarbe eingefärbt wird. Zur Beseitigung bzw. zum Verhindern von Verunreinigungen, die sich negativ im Druckbild auf den Bedruckstoff widerspiegeln, ist unabhängig von den vorhandenen Farbwalzen eine zusätzliche Auftragwalze an die Druckform an- und abstellbar. Die zusätzliche Auftragwalze ist in zwei Betriebsstellungen schaltbar. Dabei ist in der ersten Betriebsstellung die Auftragwalze an der Druckform angestellt und mit einer differierenden Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders betreibbar und in der zweiten Betriebsstellung ist die Auftragwalze von der Druckform abgestellt, jedoch in das Farbwerk integriert.An offset printing device of this type is known from DE 44 23 286 A1. A The plate cylinder carries one for the dampening agent-free offset printing (Dry flat printing) suitable printing form, which with a corresponding Ink is colored. To remove or prevent contamination, that are negatively reflected in the print image on the substrate is independent from the existing ink rollers an additional application roller to the Printing form can be switched on and off. The additional applicator roller is in two operating positions switchable. The applicator roller is on in the first operating position the printing form and with a different peripheral speed The peripheral speed of the plate cylinder can be operated and in the second operating position the application roller is turned off from the printing form, but in the Inking unit integrated.
Aus der DE-AS 18 08 909 ist eine Naß-Offset-Druckvorrichtung bekannt. Zum Entfernen von Verunreinigungen auf der Druckform ist mindestens eine Auftragwalze von Feucht- oder Farbwerk mit unterschiedlicher Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders mittels einer Zahnradfolge (formschlüssig) antreibbar. Diese Verfahrensweise ist für eine Trocken-Offsetplatte, welche eine nichtmetallische Oberflächenbeschichtung aufweist, ungeeignet, da die Trocken-Flachdruckplatte gegenüber einer feuchtmittelführenden Druckplatte für den Offsetdruck weniger verschleißfest ist. Weiterhin werden die Verunreinigungen in das Farbwerk bzw. Feuchtwerk an eine Walze weiter transportiert, wo die angesammelten Verunreinigungen in bestimmten Abständen z.B. im Farbwerk entfernt werden müssen.A wet offset printing device is known from DE-AS 18 08 909. To the Removal of contaminants on the printing form is at least one applicator roller of dampening or inking units with different peripheral speeds to the peripheral speed of the plate cylinder by means of a gear train (positively) drivable. This procedure is for a dry offset plate, which has a non-metallic surface coating, unsuitable, because the dry planographic printing plate is opposed to a dampening agent Printing plate for offset printing is less wear resistant. Furthermore, the Contaminants transported to a roller in the inking unit or dampening unit, where the accumulated impurities at certain intervals e.g. must be removed in the inking unit.
Gemäß DE-A-2 309 850 ist eine Offsetdruckmaschine für eine Rotationsdruckmaschine bekannt, deren Farbwerk farbspeicherseitig Farbreiberwalzen aufweist, welche mit einer zur Umfangsgeschwindigkeit eines Plattenzylinders kleineren Umfangsgeschwindigkeit formschlüssig antreibbar sind. Die Erfindung soll Drehschwingungen sowie das Doublieren vermeiden, indem durch die speziellen Umfangsgeschwindigkeiten der farbspeicherseitigen Farbreiberwalzen im Getriebezug eine Zugspannung aufgebaut wird, die das Zahnspiel, Umfangsschwingungen sowie ggf. einen Flankenwechsel vermeidet. Hinweise zur Reduzierung von Verschmutzungen und/oder zum Einsatz einer feuchtmittelfreien Druckplatte sind nicht zu entnehmen.According to DE-A-2 309 850 is an offset printing machine for one Rotary printing press known, the inking unit on the ink storage side Has ink roller, which with a to the peripheral speed Plate cylinder smaller circumferential speed are positively driven. The invention is intended to avoid torsional vibrations and doubling by due to the special peripheral speeds of the ink storage side Ink friction rollers in the gear train a tension is built up that Avoid backlash, circumferential vibrations and possibly a flank change. Notes on reducing contamination and / or using a dampening agent-free pressure plate are not to be removed.
Aufgabe der Erfindung ist es, eine Offsetdruckvorrichtung zu entwickeln, welche die beim Offsetdruck auftretenden Verschmutzungen spürbar reduziert.The object of the invention is to develop an offset printing device which the contamination that occurs during offset printing is noticeably reduced.
Erfindungsgemäß werden im Farbwerk alle formschlüssig betreibbaren Farbwalzen
mit zur Umfangsgeschwindigkeit des Plattenzylinders unterschiedlicher
Umfangsgeschwindigkeit betrieben, wobei die Farbauftragwalzen selbst keinen
formschlüssigen Antrieb aufweisen. Dazu werden die formschlüssig angetriebenen
Farbwalzen innerhalb des Farbwerkes stufenweise mit zueinander abweichenden
Umfangsgeschwindigkeiten zur Plattenzylinderumfangsgeschwindigkeit
rotierend angetrieben. Die innerhalb des Farbwerkes dem Plattenzylinder näher
angeordneten Farbwalzen werden dabei vorzugsweise mit geringerer, die dem
Plattenzylinder weiter entfernt angeordneten Farbwalzen werden dabei vorzugsweise
mit größerer Differenz in ihren Umfangsgeschwindigkeiten zur Umfangsgeschwindigkeit
des Plattenzylinders betrieben. Dadurch wird innerhalb des Farbwerkes
ein Differenzgefälle der Umfangsgeschwindigkeiten der formschlüssig
betriebenen Farbwalzen aufgebaut, welches beispielsweise bei wenigstens einer,
dem Plattenzylinder benachbarten Farbauftragwalze 2% und bei einer dem Plattenzylinder
am weitesten entfernten, z.B. dem Farbheber benachbarten, Farbwalze
im Walzenzug 10% zur Umfangsgeschwindigkeit des Plattenzylinders beträgt.
Dabei rotieren die formschlüssig angetriebenen Farbwalzen, bezogen auf
die Umfangsgeschwindigkeit des Plattenzylinders, vorzugsweise insgesamt mit
geringerer Umfangsgeschwindigkeit. Alternativ ist ebenso eine höhere Differenzgeschwindigkeit
zur Umfangsgeschwindigkeit des Plattenzylinders zulässig.According to the invention, all form-fit ink rollers can be operated in the inking unit
with different to the peripheral speed of the plate cylinder
Circumferential speed operated, the inking rollers themselves none
have positive drive. For this, the positively driven
Ink rollers within the inking unit gradually with different ones
Circumferential speeds to the plate cylinder circumferential speed
driven in rotation. The closer to the plate cylinder within the inking unit
arranged ink rollers are preferably with less, the
Plate cylinders located further away are preferred
with a greater difference in their peripheral speeds from the peripheral speed
of the plate cylinder operated. This is within the inking unit
a difference in the circumferential speeds of the positive
operated ink rollers built up, which, for example, at least one,
the inking roller adjacent to the
Durch die Abstufung der Differenzgeschwindigkeiten der Farbwerkswalzen zur
Umfangsgeschwindigkeit des Plattenzylinders bildet sich an jeder Walzenkontaktstelle
des Farbwerkes ein Rotationsschlupf aus. Der Rotationsschlupf ist insbesondere
an den Farbauftragwalzen durch zwei Kontaktstellen, wobei die erste
zum Plattenzylinder und die zweite zur benachbarten, formschlüssig betriebenen
Farbwerkswalze besteht, gebildet. Der Rotationsschlupf bildet den
Um das Auftreten von Verunreinigungen noch stärker zu reduzieren können die formschlüssig rotierenden, mit Differenzgeschwindigkeit zur Plattenzylinderumfangsgeschwindigkeit angetriebenen Farbwalzen zusätzlich noch formschlüssig axial oszillierend (changierend) angetrieben werden. Die Changierbewegung wird reibschlüssig auch auf die nicht angetriebenen Farbwerkswalzen übertragen. Dadurch entsteht neben dem Rotationsschlupf ein Axialschlupf innerhalb jeder Walzenkontaktstelle. Durch diesen zusätzlichen Axialschlupf werden die Verschmutzungen zusätzlich verkleinert und können weiter reduziert werden bzw. wird das Entstehen von Verschmutzungen von Beginn an verhindert. Die Ausbildung der Offsetdruckvorrichtung eignet sich dabei für den wasserlosen Offsetdruck (Trocken-Flachdruck) als auch für den Naß-Offsetdruck unter Verwendung eines Feuchtwerkes.To reduce the occurrence of impurities even more form-fitting rotating, with differential speed to the plate cylinder peripheral speed driven ink rollers also form-fitting are driven axially oscillating (oscillating). The traversing movement is also frictionally transferred to the non-driven inking unit rollers. Thereby In addition to the rotational slip, there is an axial slip within each roller contact point. This additional axial slip removes the dirt additionally reduced and can be further reduced or will Prevents contamination from the start. Training the Offset printing device is suitable for waterless offset printing (Dry flat printing) as well as for wet offset printing using a Dampening system.
Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail using an exemplary embodiment.
Dabei zeigt:
- Fig. 1
- eine schematische Darstellung eines Druckwerkes für den wasserlosen Offsetdruck,
- Fig. 2
- eine schematische Darstellung eines Druckwerkes für den Naß-Offsetdruck.
- Fig. 1
- 1 shows a schematic representation of a printing unit for waterless offset printing,
- Fig. 2
- is a schematic representation of a printing unit for wet offset printing.
Ein erfindungsgemäßes Druckwerk umfaßt einen Gummituchzylinder 1 sowie
einen Plattenzylinder 2, der eine Trockenflachdruckplatte für den wasserlosen
Offsetdruck trägt. Dem Plattenzylinder 2 sind vier Farbauftragwalzen 4.1 bis 4.4
an- und abstellbar zugeordnet. Die Farbauftragwalzen 4.1 bis 4.4 sind Bestandteil
eines durch eine Mehrzahl von Farbwalzen gebildeten Farbwerkes 5, welches die
Trockenflachdruckplatte mit einer für den wasserlosen Offsetdruck geeigneten
Druckfarbe einfärbt. Dazu wird in bekannter Weise von einem Farbkasten über
eine Heberwalze und einen Walzenzug des Farbwerkes 5 die Druckfarbe auf die
Trockenflachdruckplatte übertragen.A printing unit according to the invention comprises a
Die Farbauftragwalzen 4.1 bis 4.4 sind changierbar in Kontakt mit antreibbaren Farbwalzen 3.1, 3.4, die im vorliegenden Beispiel zusätzlich als Farbreiberwalzen ausgebildet sind. Die Farbwalzen 3.1 - 3.4 sind formschlüssig mit dem Plattenzylinder 2 getriebetechnisch gekoppelt und erhalten neben dem Rotationsantrieb einen Changierantrieb. Dabei erhalten auch die Farbauftragwalzen 4.1 - 4.4 von den Farbwalzen 3.2, 3.4 reibschlüssig einen changierenden Antrieb. In einer weiteren Ausbildung kann auch jede Farbwalze 3.1 - 3.4 einen Einzelantrieb oder auch einen gemeinsamen, jedoch vom Plattenzylinder 2 entkoppelten, Antrieb aufweisen. Die vom Plattenzylinder 2 am weitesten entfernt angeordnete Farbwalze 3.3 wird dabei mit größerer Differenz der Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Plattenzylinders 2 angetrieben als die dem Plattenzylinder 2 näher angeordneten Farbwalzen 3.2 und 3.4. Die im Walzenzug des Farbwerkes 5 etwa mittig angeordnete Farbwalze 3.1 wird mit dazwischenliegender Differenzgeschwindigkeit betrieben. Das Differenzgefälle wird dabei derart gestuft ausgebildet, daß die:
- Farbwalze 3.2 mit 2%
- Farbwalze 3.1 mit 4%
- Farbwalze 3.3 mit 6%
- Ink roller 3.2 with 2%
- Ink roller 3.1 with 4%
- Ink roller 3.3 with 6%
Differenzgeschwindigkeit zur Umfangsgeschwindigkeit formschlüssig angetrieben wird. Die Farbwalze 3.4 kann dabei mit 2 % (analog zur Farbwalze 3.2) formschlüssig angetrieben werden.Differential speed to the peripheral speed driven positively becomes. The ink roller 3.4 can with 2% (analog to the ink roller 3.2) be positively driven.
Zusätzlich zum Rotationsantrieb weisen die Farbwalzen 3.1 - 3.4 einen Changierantrieb auf. Die den Farbwalzen 3.1 - 3.4 benachbarten Übertragwalzen (ohne Positionsnummer) sowie die Farbauftragwalzen 4.1 - 4.4 sind changierbar gelagert.In addition to the rotary drive, the inking rollers 3.1-3.4 have a traversing drive on. The transfer rollers adjacent to the inking rollers 3.1 - 3.4 (without Item number) and the inking rollers 4.1 - 4.4 are changeable.
Die Wirkungsweise ist wie folgt: Im Druckbetrieb werden die Farbwalzen 3.1 - 3.4
ständig mit einer zur Umfangsgeschwindigkeit des Plattenzylinders abweichenden
Umfangsgeschwindigkeit angetrieben. Dabei beträgt die Differenz der Umfangsgeschwindigkeiten
im vorliegenden Beispiel maximal 6% und minimal 2% zu der
Umfangsgeschwindigkeit des Plattenzylinders 2. Die Umfangsgeschwindigkeiten
der Farbwalzen 3.1 - 3.4 sind stets geringer als die Umfangsgeschwindigkeit des
Plattenzylinders 2. Die Rotations- und Changierbewegung der Farbwalzen 3.1 -
3.4 wird reibschlüssig auf die benachbarten Walzen des Farbwerkes 5
übertragen. In den Kontaktstellen, insbesondere zwischen Plattenzylinder 2 und
den Farbauftragwalzen 4.1 bis 4.4. werden die Verunreinigungen
(Schmutzpartikel, Staub, Papier und Farbpartikel) reduziert. Durch die höheren
Differenzgeschwindigkeiten bei den vom Plattenzylinder 2 entfernter angeordneten
Farbwalzen 3.3 sowie 3.1 wird das Vordringen von kleineren Verunreinigungen
innerhalb des Walzenzuges verhindert. Bei größeren Verunreinigungen
werden die bereits in den Kontaktstellen der Farbwalzen 3.2 und 3.4 verkleinerten
Verunreinigungen in den weiter entfernten Kontaktstellen zusätzlich verkleinert.The mode of operation is as follows: In printing operation, the inking rollers 3.1 - 3.4
constantly with a deviating to the peripheral speed of the plate cylinder
Peripheral speed driven. The difference in peripheral speeds is
in the present example a maximum of 6% and a minimum of 2% to the
Circumferential speed of the
Das erfindungsgemäße Druckwerk umfaßt wie im ersten Beispiel einen Gummituchzylinder
1, einen Plattenzylinder 2, der eine Druckplatte für den Naß-Offsetdruck
trägt und ein Farbwerk 5. Dem Plattenzylinder 2 ist weiterhin ein
Feuchtwerk 6 zugeordnet, welches eine an- und abstellbare Feuchtauftragwalze 7
aufweist. Die Feuchtauftragwalze 7 ist in bekannter Weise mit einem Feuchtduktor,
der in einem Feuchtmittelbehälter eintaucht, gekoppelt. Dem Feuchtduktor ist
eine Dosierwalze zugeordnet. Der Feuchtauftragwalze 7 ist eine Brückenwalze
zur ersten Farbauftragwalze 4.1 zuschaltbar benachbart angeordnet. Bei Bedarf
kann eine weitere Reiterwalze der Feuchtauftragwalze 7 zugeordnet sein. Das
Farbwerk 5 weist formschlüssig antreibbare Farbwalzen 3.1 - 3.4 auf, die neben
dem Rotationsantrieb einen Changierantrieb aufweisen. Die den Farbwalzen 3.1 -
3.4 benachbarten Übertrag- bzw. Farbauftragwalzen 4.1 - 4.4 sind reibschlüssig
mit den Farbwalzen 3.1 - 3.4 in Kontakt. Dabei wird die Farbwalze 3.3 als vom
Plattenzylinder entfernteste formschlüssig antreibbare Walze mit der größten
Differenz in der Umfangsgschwindigkeit zur Plattenzylinderumfangsgeschwindigkeit
betrieben.As in the first example, the printing unit according to the invention comprises a
Analog zum ersten Beispiel beträgt hier das Differenzgefälle der Umfangsgeschwindigkeiten für die:
- Farbwalze 3.3 = 10%
- Farbwalze 3.1 = 8%
- Farbwalze 3.2 = 4%
- Farbwalze 3.4 = 2%
- Ink roller 3.3 = 10%
- Ink roller 3.1 = 8%
- Ink roller 3.2 = 4%
- Ink roller 3.4 = 2%
- 11
- GummituchzylinderBlanket cylinder
- 22nd
- PlattenzylinderPlate cylinder
- 3.1 - 3.43.1 - 3.4
- FarbwalzeInk roller
- 4.1 - 4.44.1 - 4.4
- FarbauftragwalzeInking roller
- 55
- FarbwerkInking unit
- 66
- FeuchtwerkDampening system
- 77
- FeuchtauftragwalzeDampening roller
Claims (5)
- Offset printing device for a rotary printing press with a plate cylinder (2) carrying a printing plate and an inking unit (5) with ink applicator rollers (4.1 - 4.4) as well as inking rollers (3.1 - 3.4) rotating in positively interlocked fashion and axially oscillating, wherein the inking rollers (3.1, 3.3) on the ink store side can be driven with a peripheral speed differing relative to the plate cylinder (2), characterised in that the ink applicator rollers are constructed oscillatingly and that the inking rollers (3.2, 3.4) axially oscillating and rotating in positively driven fashion and which stand in contact with the oscillating ink applicator rollers (4.1 - 4.4) can be driven with a peripheral speed differing from the peripheral speed of the plate cylinder (2), wherein the inking rollers (3.1, 3.3) towards the ink store can be driven with a greater difference relative to the inking rollers (3.2, 3.4) neighbouring the ink applicator rollers (4.1 - 4.4).
- Offset printing device according to Claim 1,
characterised in that the maximum difference of the peripheral speed of the inking roller (3.3) on the ink store side arranged most remote from the plate cylinder (2) relative to the peripheral speed of the plate cylinder (2) amounts to 10%. - Offset printing device according to Claim 1,
characterised in that the inking rollers (3.1 - 3.4) can be driven with respect to the peripheral speed with a stepped difference profile of at least 2% from one another wherein the inking rollers (3.2, 3.4) neighbouring the ink applicator rollers (4.1 - 4.4) can be driven with the same peripheral speed or not the same peripheral speed. - Offset printing device according to Claim 1,
characterised in that the plate cylinder (2) carries a dry planographic printing plate for waterless offset printing. - Offset printing device according to Claim 1,
characterised in that arranged relative to the inking unit (5) upstream in the rotational direction of the plate cylinder (2) is a damping unit (6) and the plate cylinder (2) carries a printing plate suited for wet offset printing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19625029A DE19625029A1 (en) | 1996-06-22 | 1996-06-22 | Offset printing device for rotary printing machines |
| DE19625029 | 1996-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0813961A1 EP0813961A1 (en) | 1997-12-29 |
| EP0813961B1 true EP0813961B1 (en) | 1999-06-30 |
Family
ID=7797722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97106619A Expired - Lifetime EP0813961B1 (en) | 1996-06-22 | 1997-04-22 | Offset printing device for rotary press |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5823109A (en) |
| EP (1) | EP0813961B1 (en) |
| JP (1) | JPH1067096A (en) |
| AT (1) | ATE181701T1 (en) |
| DE (2) | DE19625029A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10000903A1 (en) | 1999-02-05 | 2000-08-10 | Heidelberger Druckmasch Ag | Operating printing machine involves driving inking mechanism roller at difference speed and different relative speed wrt. form cylinder speed depending on ink mechanism operating states |
| DE10008488A1 (en) * | 1999-03-17 | 2000-09-21 | Heidelberger Druckmasch Ag | Damping unit of three rollers has pivot axle, gaps between, spring, support, swivel bearing and frame |
| EP1147889A3 (en) * | 2000-04-14 | 2006-01-18 | Komori Corporation | Roller structure in printing press |
| US6539859B2 (en) | 2000-10-17 | 2003-04-01 | Presstek, Inc. | Multicolor printing press |
| JP4199458B2 (en) * | 2001-01-19 | 2008-12-17 | ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト | Ink machine |
| JP4276010B2 (en) * | 2003-07-24 | 2009-06-10 | 株式会社小森コーポレーション | Driving device in printing press |
| US7380498B2 (en) * | 2006-08-30 | 2008-06-03 | Julius Domotor | Offset lithography system |
| EP2368972B1 (en) * | 2010-03-23 | 2013-05-15 | Cognis IP Management GmbH | Eudermic manual dishwashing composition |
| US8850976B2 (en) * | 2012-01-11 | 2014-10-07 | James M. Jeter | Inker assembly for cylindrical can decorators |
| DE102014222388A1 (en) | 2013-11-04 | 2015-05-07 | Koenig & Bauer Aktiengesellschaft | Method and device for coloring a printing plate arranged on a plate cylinder of a printing press |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3467008A (en) * | 1967-01-31 | 1969-09-16 | Julius A Domotor | Means and method for removing foreign particles from lithographic press |
| DE1808909C3 (en) * | 1968-11-14 | 1978-03-02 | Julius A. San Francisco Calif. Domotor (V.St.A.) | Method for cleaning the plate cylinder of a rotary offset printing press and the related device |
| DE2309850C3 (en) * | 1973-02-28 | 1978-06-22 | Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg | Rotary printing machine with several printing units arranged in series with braking device |
| DE2658362C3 (en) * | 1976-12-23 | 1984-08-09 | Hinterkopf, Kurt G., Dipl.-Ing. (FH), 7332 Eislingen | Inking unit for a printing machine, especially for printing tubes, sleeves and the like. |
| DE2659557A1 (en) * | 1976-12-30 | 1978-07-06 | Maschf Augsburg Nuernberg Ag | ROTARY OFFSET PRINTER |
| DE3034644C2 (en) * | 1980-09-13 | 1982-10-07 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Inking unit with changing inking rollers |
| DE3239114A1 (en) * | 1981-10-22 | 1983-08-25 | Dahlgren Mfg. Co., 75235 Dallas, Tex. | Printing machine |
| US5265527A (en) * | 1991-06-14 | 1993-11-30 | Harris Graphics Corporation | Offset printing press with emulsification control |
| US5345865A (en) * | 1993-04-07 | 1994-09-13 | Dahlgren Usa, Inc. | Hickey removal system |
| DE4423286C2 (en) * | 1994-07-02 | 1998-06-04 | Heidelberger Druckmasch Ag | Printing unit for a rotary offset printing machine |
-
1996
- 1996-06-22 DE DE19625029A patent/DE19625029A1/en not_active Withdrawn
-
1997
- 1997-04-22 AT AT97106619T patent/ATE181701T1/en not_active IP Right Cessation
- 1997-04-22 EP EP97106619A patent/EP0813961B1/en not_active Expired - Lifetime
- 1997-04-22 DE DE59700237T patent/DE59700237D1/en not_active Expired - Lifetime
- 1997-06-20 US US08/880,121 patent/US5823109A/en not_active Expired - Fee Related
- 1997-06-20 JP JP9163775A patent/JPH1067096A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE19625029A1 (en) | 1998-01-08 |
| ATE181701T1 (en) | 1999-07-15 |
| JPH1067096A (en) | 1998-03-10 |
| EP0813961A1 (en) | 1997-12-29 |
| US5823109A (en) | 1998-10-20 |
| DE59700237D1 (en) | 1999-08-05 |
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