EP0465789B1 - Printing unit with means for executing a flying printing plate exchange - Google Patents

Printing unit with means for executing a flying printing plate exchange Download PDF

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Publication number
EP0465789B1
EP0465789B1 EP91107262A EP91107262A EP0465789B1 EP 0465789 B1 EP0465789 B1 EP 0465789B1 EP 91107262 A EP91107262 A EP 91107262A EP 91107262 A EP91107262 A EP 91107262A EP 0465789 B1 EP0465789 B1 EP 0465789B1
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EP
European Patent Office
Prior art keywords
printing
printing unit
unit according
plate
roller
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Expired - Lifetime
Application number
EP91107262A
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German (de)
French (fr)
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EP0465789A1 (en
Inventor
Peter Knauer
Erich Wech
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Manroland AG
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MAN Roland Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange

Definitions

  • the invention relates to a printing unit of an offset printing machine for performing a flying printing plate change with two plate cylinders used alternately, to which an inking unit and at least one dampening unit is assigned, and a blanket cylinder and an impression cylinder, between which the printing material web is guided.
  • the object of the invention is to design a printing unit of the type mentioned in the introduction in such a way that the plate cylinders are not moved in order to carry out a flying printing plate change.
  • the offset printing unit shown in FIG. 1 has a blanket cylinder 1 which interacts with an impression cylinder 2 arranged underneath.
  • the blanket cylinder 1 and the impression cylinder 2 are mounted in a known manner with eccentric bearings 4, 5 in side walls of the printing press, of which one side wall 3 is shown in FIG. 3.
  • the blanket cylinder 1 can be transferred into three different positions 6, 7, 8 by means of the eccentric bearing 4.
  • the impression cylinder 2 can be converted into three different positions in the same way by means of the eccentric bearing 5.
  • a printing material web 9 is passed between the blanket cylinder 1 and the impression cylinder 2.
  • the axes of the blanket cylinder 1 and the impression cylinder 2 are arranged at an angle to one another.
  • the blanket cylinder 1 is assigned two plate cylinders 10, 11 which are arranged at a distance from one another and are mounted in a stationary manner in the side walls of the printing press.
  • the plate cylinders 10, 11 are positioned such that the blanket cylinder 1 is optionally in its possible position 6 on the plate cylinder 10 and in its position 8 on the plate cylinder 11.
  • the blanket cylinder 1 is parked by both plate cylinders 10, 11.
  • the blanket cylinder 1 and the impression cylinder 2 are shown in dashed lines in FIG. 1.
  • Each of the two plate cylinders 10, 11 is assigned an insertion roller 12, 13 for the liquid drawing in of the printing plate 14, 15 to be replaced in each case.
  • the inking roller 16 is mounted at both ends in an adjusting lever 17 and can optionally be placed on one of the two plate cylinders or can be removed from them.
  • the adjusting levers 17 are arranged so as to be pivotable about an inking roller 18 designed as an oscillating friction roller.
  • the inking roller 18 is followed by further rollers, not shown, of any inking unit.
  • a dampening solution supply roller 19 of a dampening unit 20 is also present on the inking roller 16.
  • the dampening solution feed roller 19 is supported at both ends on two articulated levers 21, 22, of which the articulated lever 21 can be pivoted about the axis of the inking roller 16 and the articulated lever 22 about the axis of a stationary dampening roller 23.
  • These articulated levers 21, 22 ensure that the dampening solution supply roller 19 always remains in contact with both the dampening unit roller 23 and the inking roller 16.
  • pressure springs instead of the articulated lever 21 or 22, which ensure that the dampening solution feed roller 19 bears against the inking roller 16 or the dampening roller 23.
  • two application rollers mounted on a common support pivotable about the axis of the inking roller 18 can also be provided.
  • the dampening unit 20 is then expediently placed on the inking roller 18 or a separate dampening unit is assigned directly to each plate cylinder.
  • a further printing unit is provided, as it were, in mirror image to the continuous printing material web 9, the blanket cylinder of which forms the impression cylinder 2.
  • This in turn is assigned two plate cylinders 24, 25 which are fixedly spaced from one another.
  • An insertion roller 26, 27 is attached to each of the two plate cylinders 24, 25, which ensures the simple insertion of the respective pressure plate 28, 29.
  • the two plate cylinders 24, 25 are assigned a combined ink / dampening application roller, to which an inking and dampening unit can be set, as well as to the inking application roller 16.
  • Such printing units shown in FIG. 1 can also be arranged several times in succession, so that, in extreme cases, a complete printing machine is made up of similar printing units for performing a flying printing plate change. Because of the wrapping of the printing material web 9 on the cylinders 1 and 2, additional web guiding means are unnecessary.
  • the measure of letting the axial components of the blanket cylinder 1 and the impression cylinder 2 run obliquely with respect to one another means that the printing material web 9 is wrapped around the cylinders 1 and 2.
  • Fig. 3 the drive and the mechanical coupling of the blanket cylinder 1 with the impression cylinder 2 is shown.
  • gears 32, 33 are mounted to the shafts 30, 31 of the blanket cylinder 1 and the impression cylinder 2, which are mounted on the side shown by means of the eccentric bearings 4, 5 in the side wall 3.
  • the gear 32 of the blanket cylinder 1 is designed as a double gear, one toothing 34 of the gear 32 meshing with the gear 33 and the other toothing 35 of the gear 32 being in engagement with a gear 36 of a fixedly positioned shaft 37 of the machine drive.
  • pneumatic adjusting devices act on the eccentric bearings 4, 5 in a known manner. While the eccentric bearings 4, 5 impose a translational movement on the blanket cylinder 1 and the impression cylinder 2 when changing between the three possible positions 6, 7, 8, the shaft 30 of the blanket cylinder 1 rolls by means of the toothing 35 around the gear 36 of the shaft 37 of the machine drive from. At the same time, the resulting movement of the blanket cylinder 1 in the circumferential direction is transmitted to the impression cylinder 2 by means of the toothing 34 with the gear 33. The gear 33 rotates in the opposite direction to the toothing 34.
  • the mechanical coupling of the blanket cylinder 1 with the impression cylinder 2 thus enables compensation of the adjustment path S when the position of the blanket cylinder 1 and the impression cylinder 2 changes, for example from position 8 to position 6 by turning back the point 38, i.e. the point of contact of the blanket cylinder 1 with the impression cylinder 2 by the distance S.
  • the tension channels 39 a touch for the rubber blanket of the blanket cylinder 1 and 40 a for the blanket of the impression cylinder 2 in position 8.
  • position 6 the positions of the tension channels 39 b and 40 b by the distance S in the circumferential direction the blanket cylinder 1 and the impression cylinder 2 offset.
  • the register is maintained in relation to a downstream printing unit or the folder.
  • the blanket cylinder 1 and the impression cylinder 2 move about the shaft 37, a change between the positions 6 and 8 in the middle position 7 results in a separation of the blanket cylinder 1 and the impression cylinder 2, the toothing 34 and the gearwheel 33 are kept in comb.
  • the double gear 32 and the gear 33 each engage a further gear from which the drive of the plate cylinders 10, 11, 24, 25 is derived.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft eine Druckeinheit einer Offsetdruckmaschine zur Durchführung eines fliegenden Druckplattenwechsels mit zwei wechselweise zum Einsatz kommenden Plattenzylindern, denen ein Farbwerk und mindestens ein Feuchtwerk zugeordnet ist, sowie einem Gummituchzylinder und einem Gegendruckzylinder, zwischen denen die Bedruckstoffbahn geführt ist.The invention relates to a printing unit of an offset printing machine for performing a flying printing plate change with two plate cylinders used alternately, to which an inking unit and at least one dampening unit is assigned, and a blanket cylinder and an impression cylinder, between which the printing material web is guided.

Aus der DE-GM 84 10 619 ist ein Offsetdruckwerk mit zwei von einem Gummituchzylinder horizontal abfahrbaren Plattenzylindern bekannt. Wenn jeder Plattenzylinder zur Korrektur von Kopierfehlern oder Abweichungen im Abbiegen oder Einspannen der Druckplatten mit einer Seiten-, Umfangs- und Diagonalverstellung ausgestattet ist, wird die Verschiebung der Plattenzylinder mit der Bedingung, ein registerhaltiges Weiterdrucken zu sichern, problematisch und anlagentechnisch aufwendig. Außerdem müssen bei dieser Ausbildung, um einem eventuellen Papierriß entgegentreten zu können, der Gummituchzylinder oder Gegendruckzylinder ebenfalls gesondert an- und abstellbar sein.From DE-GM 84 10 619 an offset printing unit with two plate cylinders horizontally movable from a blanket cylinder is known. If each plate cylinder is equipped with a side, circumferential and diagonal adjustment to correct copying errors or deviations in the bending or clamping of the printing plates, the displacement of the plate cylinder becomes problematic and system-technically complex on the condition that it ensures continued register-based printing. In addition, in this design, in order to be able to counter any paper tear, the blanket cylinder or impression cylinder must also be able to be switched on and off separately.

Aufgabe der Erfindung ist es, eine Druckeinheit der eingangs genannten Gattung so auszubilden, daß die Plattenzylinder zur Durchführung eines fliegenden Druckplattenwechsels nicht bewegt werden.The object of the invention is to design a printing unit of the type mentioned in the introduction in such a way that the plate cylinders are not moved in order to carry out a flying printing plate change.

Diese Aufgabe wird durch Anwendung der Merkmale des Kennzeichens des Anspruchs 1 gelöst.This object is achieved by applying the features of the characterizing part of claim 1.

Weitere Merkmale ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines Ausführungsbeispieles der Erfindung anhand der Zeichnung.Further features emerge from the subclaims and the following description of an embodiment of the invention with reference to the drawing.

Es zeigen:

Fig. 1
einen schematischen Querschnitt durch eine Druckeinheit,
Fig. 2
einen schematischen Querschnitt durch einen Gummituchzylinder und einen Gegendruckzylinder nach Fig. 1,
Fig. 3
eine schematische Darstellung des Antriebes für die beiden Gummituchzylinder der Druckeinheit nach Fig. 2.
Show it:
Fig. 1
2 shows a schematic cross section through a printing unit,
Fig. 2
2 shows a schematic cross section through a blanket cylinder and an impression cylinder according to FIG. 1,
Fig. 3
2 shows a schematic representation of the drive for the two blanket cylinders of the printing unit according to FIG. 2.

Die in Fig. 1 dargestellte Offsetdruckeinheit weist einen Gummituchzylinder 1 auf, der mit einem darunter angeordneten Gegendruckzylinder 2 zusammenwirkt. Der Gummituchzylinder 1 und der Gegendruckzylinder 2 sind in Seitenwänden der Druckmaschine, wovon eine Seitenwand 3 in Fig. 3 dargestellt ist, in bekannter Weise mit Exzenterlagern 4, 5 gelagert. Mittels des Exzenterlagers 4 ist der Gummituchzylinder 1 in drei verschiedene Positionen 6, 7, 8 überführbar. Der Gegendruckzylinder 2 ist mittels des Exzenterlagers 5 in gleicher Weise in drei verschiedene Positionen umstellbar. Zwischen dem Gummituchzylinder 1 und dem Gegendruckzylinder 2 wird eine Bedruckstoffbahn 9 hindurchgeführt.The offset printing unit shown in FIG. 1 has a blanket cylinder 1 which interacts with an impression cylinder 2 arranged underneath. The blanket cylinder 1 and the impression cylinder 2 are mounted in a known manner with eccentric bearings 4, 5 in side walls of the printing press, of which one side wall 3 is shown in FIG. 3. The blanket cylinder 1 can be transferred into three different positions 6, 7, 8 by means of the eccentric bearing 4. The impression cylinder 2 can be converted into three different positions in the same way by means of the eccentric bearing 5. A printing material web 9 is passed between the blanket cylinder 1 and the impression cylinder 2.

Zur Erzielung einer Umschlingung der Bedruckstoffbahn 9 bei horizontaler Bahnführung sind die Achsen des Gummituchzylinders 1 und des Gegendruckzylinders 2 zueinander schräg liegend angeordnet.To achieve wrapping of the printing material web 9 with a horizontal web guide, the axes of the blanket cylinder 1 and the impression cylinder 2 are arranged at an angle to one another.

Dem Gummituchzylinder 1 sind zwei mit Abstand voneinander angeordnete Plattenzylinder 10, 11 zugeordnet, die ortsfest in den Seitenwänden der Druckmaschine gelagert sind. Die Plattenzylinder 10, 11 sind derart positioniert, daß der Gummituchzylinder 1 wahlweise in seiner möglichen Position 6 an den Plattenzylinder 10 und in seiner Position 8 an den Plattenzylinder 11 angestellt ist. In der Position 7 ist der Gummituchzylinder 1 von beiden Plattenzylindern 10, 11 abgestellt. In dieser Position 7 ist der Gummituchzylinder 1 und der Gegendruckzylinder 2 in Fig. 1 gestrichelt dargestellt. Jedem der beiden Plattenzylinder 10, 11 ist je eine Einführwalze 12, 13 zum flüssigen Einziehen der jeweils einzuwechselnden Druckplatte 14, 15 zugeordnet.The blanket cylinder 1 is assigned two plate cylinders 10, 11 which are arranged at a distance from one another and are mounted in a stationary manner in the side walls of the printing press. The plate cylinders 10, 11 are positioned such that the blanket cylinder 1 is optionally in its possible position 6 on the plate cylinder 10 and in its position 8 on the plate cylinder 11. In position 7, the blanket cylinder 1 is parked by both plate cylinders 10, 11. In this position 7, the blanket cylinder 1 and the impression cylinder 2 are shown in dashed lines in FIG. 1. Each of the two plate cylinders 10, 11 is assigned an insertion roller 12, 13 for the liquid drawing in of the printing plate 14, 15 to be replaced in each case.

Während des Druckvorgangs steht nur einer der beiden Plattenzylinder 10, 11 sowohl mit dem Gummituchzylinder 1, wie auch mit einer Farbauftragwalze 16 in Berührung. Die Farbauftragwalze 16 ist an beiden Enden in je einem Stellhebel 17 gelagert und ist wahlweise an einen der beiden Plattenzylinder anstellbar bzw. von diesen abstellbar angeordnet. Die Stellhebel 17 sind um eine als changierende Reibwalze ausgebildete Farbwerkwalze 18 schwenkbar angeordnet. An die Farbwerkwalze 18 schließen sich weitere, nicht dargestellte Walzen eines beliebigen Farbwerks an.During the printing process, only one of the two plate cylinders 10, 11 stands both with the blanket cylinder 1 and with one Ink roller 16 in contact. The inking roller 16 is mounted at both ends in an adjusting lever 17 and can optionally be placed on one of the two plate cylinders or can be removed from them. The adjusting levers 17 are arranged so as to be pivotable about an inking roller 18 designed as an oscillating friction roller. The inking roller 18 is followed by further rollers, not shown, of any inking unit.

An der Farbauftragwalze 16 liegt weiterhin eine Feuchtmittelzuführwalze 19 eines Feuchtwerks 20 an. Die Feuchtmittelzuführwalze 19 ist mit beiden Enden an je zwei Gelenkhebeln 21, 22 gelagert, von denen der Gelenkhebel 21 um die Achse der Farbauftragwalze 16 und der Gelenkhebel 22 um die Achse einer feststehenden Feuchtwerkwalze 23 schwenkbar ist. Diese Gelenkhebel 21, 22 stellen sicher, daß die Feuchtmittelzuführwalze 19 stets sowohl mit der Feuchtwerkwalze 23, als auch mit der Farbauftragwalze 16 in Kontakt bleibt. Es wäre im Rahmen der Erfindung jedoch auch denkbar, anstelle des Gelenkhebels 21 oder 22 Andruckfedern zu verwenden, die die Anlage der Feuchtmittelzuführwalze 19 an der Farbauftragwalze 16 oder der Feuchtwerkwalze 23 sicherstellen.A dampening solution supply roller 19 of a dampening unit 20 is also present on the inking roller 16. The dampening solution feed roller 19 is supported at both ends on two articulated levers 21, 22, of which the articulated lever 21 can be pivoted about the axis of the inking roller 16 and the articulated lever 22 about the axis of a stationary dampening roller 23. These articulated levers 21, 22 ensure that the dampening solution supply roller 19 always remains in contact with both the dampening unit roller 23 and the inking roller 16. However, it would also be conceivable within the scope of the invention to use pressure springs instead of the articulated lever 21 or 22, which ensure that the dampening solution feed roller 19 bears against the inking roller 16 or the dampening roller 23.

Anstelle einer Farbauftragwalze 16 können auch zwei auf einem gemeinsamen, um die Achse der Farbwerkwalze 18 schwenkbaren Träger gelagerte Auftragwalzen vorgesehen sein. Das Feuchtwerk 20 ist dann zweckmäßig an die Farbwerkwalze 18 angestellt oder es ist jedem Plattenzylinder direkt ein eigenes Feuchtwerk zugeordnet.Instead of an inking roller 16, two application rollers mounted on a common support pivotable about the axis of the inking roller 18 can also be provided. The dampening unit 20 is then expediently placed on the inking roller 18 or a separate dampening unit is assigned directly to each plate cylinder.

Mit der dargestellten Offsetdruckeinheit kann Schön- und Wiederdruck durchgeführt werden. Hierzu ist gleichsam spiegelbildlich zu der durchlaufenden Bedruckstoffbahn 9 ein weiteres Druckwerk vorgesehen, dessen Gummituchzylinder den Gegendruckzylinder 2 bildet. Diesem sind wiederum zwei mit Abstand voneinander fest angeordnete Plattenzylinder 24, 25 zugeordnet. An jeden der beiden Plattenzylinder 24, 25 ist je eine Einführwalze 26, 27 angestellt, die das einfache Einführen der jeweiligen Druckplatte 28, 29 sicherstellt. Den beiden Plattenzylindern 24, 25 ist wie oben beschrieben eine kombinierte Farb-Feucht-Auftragswalze zugeordnet, an die ebenso wie an die Farbauftragwalze 16 ein Farb- und ein Feuchtwerk anstellbar sind.With the offset printing unit shown, fine and reprinting can be carried out. For this purpose, a further printing unit is provided, as it were, in mirror image to the continuous printing material web 9, the blanket cylinder of which forms the impression cylinder 2. This in turn is assigned two plate cylinders 24, 25 which are fixedly spaced from one another. An insertion roller 26, 27 is attached to each of the two plate cylinders 24, 25, which ensures the simple insertion of the respective pressure plate 28, 29. As described above, the two plate cylinders 24, 25 are assigned a combined ink / dampening application roller, to which an inking and dampening unit can be set, as well as to the inking application roller 16.

Selbstverständlich können auch solche in Fig. 1 gezeigten Druckeinheiten mehrfach hintereinander angeordnet werden, so daß im Extremfall eine komplette Druckmaschine aus gleichartigen Druckeinheiten zur Durchführung eines fliegenden Druckplattenwechsels entsteht. Wegen der Umschlingung der Bedruckstoffbahn 9 an den Zylindern 1 und 2 sind zusätzliche Bahnführungsmittel überflüssig.Of course, such printing units shown in FIG. 1 can also be arranged several times in succession, so that, in extreme cases, a complete printing machine is made up of similar printing units for performing a flying printing plate change. Because of the wrapping of the printing material web 9 on the cylinders 1 and 2, additional web guiding means are unnecessary.

Durch die Maßnahme, die axialen Komponenten des Gummituchzylinders 1 und des Gegendruckzylinders 2 zueinander schräg verlaufen zu lassen, erreicht man, daß die Bedruckstoffbahn 9 eine Umschlingung an den Zylindern 1 und 2 erfährt.The measure of letting the axial components of the blanket cylinder 1 and the impression cylinder 2 run obliquely with respect to one another means that the printing material web 9 is wrapped around the cylinders 1 and 2.

In Fig. 3 ist der Antrieb und die mechanische Kopplung des Gummituchzylinders 1 mit dem Gegendruckzylinder 2 gezeigt. Auf den Wellen 30, 31 des Gummituchzylinders 1 und des Gegendruckzylinders 2, die an der dargestellten Seite mittels der Exzenterlager 4, 5 in der Seitenwand 3 gelagert sind, sind Zahnräder 32, 33 montiert. Das Zahnrad 32 des Gummituchzylinders 1 ist als Doppelzahnrad ausgeführt, wobei die eine Verzahnung 34 des Zahnrades 32 mit dem Zahnrad 33 kämmt und die andere Verzahnung 35 des Zahnrades 32 mit einem Zahnrad 36 einer fest positionierten Welle 37 des Maschinenantriebes in Eingriff steht.In Fig. 3, the drive and the mechanical coupling of the blanket cylinder 1 with the impression cylinder 2 is shown. To the shafts 30, 31 of the blanket cylinder 1 and the impression cylinder 2, which are mounted on the side shown by means of the eccentric bearings 4, 5 in the side wall 3, gears 32, 33 are mounted. The gear 32 of the blanket cylinder 1 is designed as a double gear, one toothing 34 of the gear 32 meshing with the gear 33 and the other toothing 35 of the gear 32 being in engagement with a gear 36 of a fixedly positioned shaft 37 of the machine drive.

Um den Gummituchzylinder 1 und den Gegendruckzylinder 2 umzupositionieren, greifen an den Exzenterlagern 4, 5 in bekannter Weise pneumatische Stellvorrichtungen an. Während die Exzenterlager 4, 5 dem Gummituchzylinder 1 und dem Gegendruckzylinder 2 beim Wechseln zwischen den drei möglichen Positionen 6, 7, 8 eine translatorische Bewegung aufzwingen, rollt die Welle 30 des Gummituchzylinders 1 mittels der Verzahnung 35 um das Zahnrad 36 der Welle 37 des Maschinenantriebs ab. Gleichzeitig wird die daraus resultierende Bewegung des Gummituchzylinders 1 in Umfangsrichtung mittels der Verzahnung 34 mit dem Zahnrad 33 auf den Gegendruckzylinder 2 übertragen. Dabei dreht sich das Zahnrad 33 gegensinnig zur Verzahnung 34.In order to reposition the blanket cylinder 1 and the impression cylinder 2, pneumatic adjusting devices act on the eccentric bearings 4, 5 in a known manner. While the eccentric bearings 4, 5 impose a translational movement on the blanket cylinder 1 and the impression cylinder 2 when changing between the three possible positions 6, 7, 8, the shaft 30 of the blanket cylinder 1 rolls by means of the toothing 35 around the gear 36 of the shaft 37 of the machine drive from. At the same time, the resulting movement of the blanket cylinder 1 in the circumferential direction is transmitted to the impression cylinder 2 by means of the toothing 34 with the gear 33. The gear 33 rotates in the opposite direction to the toothing 34.

Die mechanische Kopplung des Gummituchzylinders 1 mit dem Gegendruckzylinder 2 ermöglicht also eine Kompensation des Verstellweges S bei einem Positionswechsel des Gummituchzylinders 1 und des Gegendruckzylinders 2, zum Beispiel von Positon 8 nach Position 6 durch Rückdrehung des Punktes 38, d.h. des Berührungspunktes des Gummituchzylinders 1 mit dem Gegendruckzylinder 2 um die Strecke S.The mechanical coupling of the blanket cylinder 1 with the impression cylinder 2 thus enables compensation of the adjustment path S when the position of the blanket cylinder 1 and the impression cylinder 2 changes, for example from position 8 to position 6 by turning back the point 38, i.e. the point of contact of the blanket cylinder 1 with the impression cylinder 2 by the distance S.

In Fig. 2 berühren sich die Spannkanäle 39 a für das Gummituch des Gummituchzylinders 1 und 40 a für das Gummituch des Gegendruckzylinders 2 in der Position 8. In der Position 6 sind die Lagen der Spannkanäle 39 b und 40 b um die Strecke S in Umfangsrichtung des Gummituchzylinders 1 und des Gegendruckzylinder 2 versetzt. Durch die Kompensation des Verstellweges S wird das Register gegenüber einem nachgeschalteten Druckwerk oder dem Falzapparat aufrechterhalten. Des weiteren wird bei der gemeinsamen Bewegung des Gummituchzylinders 1 und des Gegendruckzylinders 2 um die Welle 37 bei einem Wechsel zwischen den Positionen 6 und 8 in der mittleren Position 7 eine Trennung des Gummituchzylinders 1 und des Gegendruckzylinders 2 erreicht, wobei die Verzahnung 34 und das Zahnrad 33 in Kämmung gehalten werden.In Fig. 2, the tension channels 39 a touch for the rubber blanket of the blanket cylinder 1 and 40 a for the blanket of the impression cylinder 2 in position 8. In position 6, the positions of the tension channels 39 b and 40 b by the distance S in the circumferential direction the blanket cylinder 1 and the impression cylinder 2 offset. By compensating the adjustment path S, the register is maintained in relation to a downstream printing unit or the folder. Furthermore, when the blanket cylinder 1 and the impression cylinder 2 move about the shaft 37, a change between the positions 6 and 8 in the middle position 7 results in a separation of the blanket cylinder 1 and the impression cylinder 2, the toothing 34 and the gearwheel 33 are kept in comb.

In den Positionen 6 und 8 stellt sich der minimale Achsabstand zwischen dem Gummituchzylinder 1 und dem Gegendruckzylinder 2 ein.In positions 6 and 8, the minimum center distance between the blanket cylinder 1 and the impression cylinder 2 is set.

Mit dem Doppelzahnrad 32 und dem Zahnrad 33 steht, aus Übersichtlichkeitsgründen nicht dargestellt, jeweils ein weiteres Zahnrad in Eingriff, von dem der Antrieb der Plattenzylinder 10, 11, 24, 25 abgeleitet wird.For the sake of clarity, the double gear 32 and the gear 33 each engage a further gear from which the drive of the plate cylinders 10, 11, 24, 25 is derived.

Um die Plattenzylinder 10, 11, 24, 25 unabhängig vom Maschinenantrieb stillsetzen und antreiben zu können, sind jeweils zwischen den Wellen der Plattenzylinder 10, 11, 24, 25 in bekannter Weise elektrisch schaltbare und trennbare Kupplungen zwischengeschaltet. Während also jeweils der Plattenzylinder, an den der Gummituchzylinder 1 und die Farbauftragwalze 16 angestellt sind, rotiert, kann an dem anderen ausgekuppelten und folglich stillstehenden Plattenzylinder die Druckplatte gewechselt werden. Durch die Einführwalzen 12, 13 wird jede Berührung der einzuleitenden Druckplatte mit der rotierenden Farbauftragwalze 16 und des rotierenden Gummituchzylinders 1 vermieden.In order to be able to stop and drive the plate cylinders 10, 11, 24, 25 independently of the machine drive, electrically switchable and separable couplings are interposed between the shafts of the plate cylinders 10, 11, 24, 25 in a known manner. So while the plate cylinder to which the Blanket cylinder 1 and the inking roller 16 are turned, rotated, the printing plate can be changed on the other disengaged and consequently stationary plate cylinder. Any contact of the printing plate to be introduced with the rotating inking roller 16 and the rotating blanket cylinder 1 is avoided by the introduction rollers 12, 13.

Claims (10)

  1. Printing unit of an offset printing machine for carrying out a flying printing plate exchange, having two alternately used plate cylinders to which an inking unit and at least one dampening unit are assigned, and a blanket cylinder and an impression cylinder, between which the printing material web is guided, characterised in that the plate cylinders (10, 11) are fixedly arranged at a predetermined distance from each other, in that the blanket cylinder (1) has an eccentric bearing constructed so that three different positions (6, 7, 8) can be set, in which the blanket cylinder (1) can be placed optionally on one of the two plate cylinders (10, 11) for applying a printed image on the printing material web (9), or is lifted from both plate cylinders (10, 11) and the impression cylinder (2), and in that the inking unit is arranged to be placed optionally on one of the two plate cylinders (10, 11) or to be removed from them.
  2. Printing unit according to claim 1, characterised in that the impression cylinder (2) is constructed as a blanket cylinder of a printing unit constructed in mirror-image with respect to the printing material web (9) and delivering a verso print.
  3. Printing unit according to claim 1 or 2, characterised in that the inking unit has an inking roller (16) capable of being alternately placed on one of the two plate cylinders (10, 11) or removed from both plate cylinders (10, 11).
  4. Printing unit according to at least one of the preceding claims, characterised in that the inking roller (16) abuts an inking unit roller (18) and is pivotably mounted about its axis.
  5. Printing unit according to at least one of the preceding claims, characterised in that only one dampening unit (20) is provided, with a dampening agent feed roller (19) abutting the inking roller (16).
  6. Printing unit according to claim 5, characterised in that the dampening agent feed roller (19) is pivotable about the axis of the inking roller (16).
  7. Printing unit according to claim 1, characterised in that a plate intake device (12, 13) is assigned to each of the two plate cylinders (10, 11).
  8. Printing unit according to claim 7, characterised in that the plate intake device (12, 13) is constructed as an intake roller for the smooth intake of the respective printing plate (14, 15) to be used.
  9. Printing unit according to at least one of the preceding claims, characterised in that the blanket cylinder (1) has on its shaft (30) a double gear wheel (32), and the impression cylinder has on its shaft (31) a single gear wheel (33) which mates with one set of toothing (34) of the double gear wheel (32), and the other set of toothing (35) of the double gear wheel (32) is in engagement with a gear wheel (36) in connection with the machine drive.
  10. Printing unit according to at least one of the preceding claims, characterised in that to obtain a looping of the printing material web (9) the axes of the blanket cylinder (1) and of the impression cylinder (2) are arranged to be inclined with respect to each other.
EP91107262A 1990-07-10 1991-05-04 Printing unit with means for executing a flying printing plate exchange Expired - Lifetime EP0465789B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021895 1990-07-10
DE4021895A DE4021895C2 (en) 1990-07-10 1990-07-10 Printing unit of an offset printing machine for performing a flying printing plate change

Publications (2)

Publication Number Publication Date
EP0465789A1 EP0465789A1 (en) 1992-01-15
EP0465789B1 true EP0465789B1 (en) 1994-07-06

Family

ID=6409994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107262A Expired - Lifetime EP0465789B1 (en) 1990-07-10 1991-05-04 Printing unit with means for executing a flying printing plate exchange

Country Status (5)

Country Link
US (1) US5134934A (en)
EP (1) EP0465789B1 (en)
JP (1) JP2918075B2 (en)
CA (1) CA2043869C (en)
DE (2) DE4021895C2 (en)

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EP0980315B1 (en) * 1997-05-09 2002-08-07 Koenig & Bauer Aktiengesellschaft Inker unit
DE19724765A1 (en) * 1997-06-12 1998-12-17 Roland Man Druckmasch Drive mechanism for rotary printing-press with transfer cylinder adjustable for angle
US5904093A (en) * 1997-08-07 1999-05-18 Heidelberger Druckmaschinen Ag Apparatus and method for changing images during operation of a printing press
US5806427A (en) * 1997-08-29 1998-09-15 Goss Graphic Systems, Inc. Printing press having carriage mounted interchangeable plate cylinders
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JP2964238B2 (en) * 1998-03-06 1999-10-18 株式会社東京機械製作所 Offset printing mechanism and offset printing machine having this printing mechanism
US6745688B1 (en) * 1998-03-31 2004-06-08 Heidelberger Druckmaschinen Ag Lithographic web-fed rotary printing press
DE19820331A1 (en) * 1998-05-07 1999-11-11 Roland Man Druckmasch Printing unit for flying printing plate change
US5983794A (en) * 1998-09-15 1999-11-16 Heidelberger Druckmashinen Ag Imprinter printing unit for a web rotary printing press
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US6474231B1 (en) * 2000-07-26 2002-11-05 Heidelberger Druckmaschinen Ag Multi-color printing press with common blanket cylinder
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FR2926486B1 (en) 2008-01-17 2011-12-02 Goss Int Montataire Sa METHOD OF CHANGING EDITING ON A ROTARY PRESS
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DE102018200643A1 (en) * 2018-01-16 2019-07-18 Koenig & Bauer Ag Web-fed rotary printing press and a method of adjusting the web-fed rotary printing press
DE102018122146A1 (en) 2018-09-11 2020-03-12 Koenig & Bauer Ag Simultaneous sheet printing unit and a sheet printing machine
DE102018122149A1 (en) 2018-09-11 2020-03-12 Koenig & Bauer Ag Sheet printing unit and a sheet printing machine
DE102018122159A1 (en) 2018-09-11 2020-03-12 Koenig & Bauer Ag Sheet printing machine with simultaneous sheet printing unit and screen printing form cylinder
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CN113085363A (en) * 2021-03-30 2021-07-09 江西万丽龙实业有限公司 Flexible printing device for packaging carton

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Also Published As

Publication number Publication date
JP2918075B2 (en) 1999-07-12
DE4021895A1 (en) 1992-01-16
CA2043869C (en) 1994-04-26
DE4021895C2 (en) 1994-02-17
US5134934A (en) 1992-08-04
EP0465789A1 (en) 1992-01-15
JPH04232746A (en) 1992-08-21
DE59102108D1 (en) 1994-08-11
CA2043869A1 (en) 1992-01-11

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