EP0796733A1 - Printing machine, preferably flexographic press - Google Patents

Printing machine, preferably flexographic press Download PDF

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Publication number
EP0796733A1
EP0796733A1 EP97102078A EP97102078A EP0796733A1 EP 0796733 A1 EP0796733 A1 EP 0796733A1 EP 97102078 A EP97102078 A EP 97102078A EP 97102078 A EP97102078 A EP 97102078A EP 0796733 A1 EP0796733 A1 EP 0796733A1
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EP
European Patent Office
Prior art keywords
printing
roller
anilox roller
gear
anilox
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.)
Granted
Application number
EP97102078A
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German (de)
French (fr)
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EP0796733B1 (en
Inventor
Fritz Achelpohl
Günter Rogge
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0796733A1 publication Critical patent/EP0796733A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/0008—Driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a printing press, preferably a flexographic printing press, with an impression cylinder mounted in a printing press frame, which is provided with a drive, and with at least one printing unit, which consists of a driven printing roller that can be adjusted to the impression cylinder and an ink application or Anilox roller exists, which interacts with a flushing inking unit, the impression cylinder, the printing and anilox roller each having coaxial gears for their drive, the anilox roller is provided with a special continuous drive and the printing roller gearwheel with the impression cylinder gearwheel and in each case by parallel displacement of the printing roller and the anilox roller the anilox roller gear can be coupled to the printing roller gear.
  • a flexographic printing machine of this type is known for example from DE-PS 34 37 216. 7 of the drawing, the drive of the impression cylinder and the drive of the printing roller and the anilox roller of only one printing unit of the known printing press will be briefly described below.
  • the shaft journals of the impression cylinder 3 are mounted, which are only indicated by the dashed center line.
  • the central wheel 4 is keyed onto the right-hand shaft journal of the impression cylinder 3.
  • the central wheel 4 is driven by the main drive motor 5, which is an electric motor, via the output pinion 6 and the intermediate gear wheels 7 to 10, which form the corresponding gear stages.
  • the gears 8 and 9 are wedged onto a shaft 11 indicated by dashed lines, which is also mounted in the printing machine frame.
  • the printing roller 12 and the anilox roller 13 are mounted in bearing blocks of carriages which are displaceably guided on consoles of the printing machine frame, as has been described in DE-PS 34 37 216.
  • the pressure roller gear 14 and the anilox roller gear 15 are placed on the right, through the bearing blocks of the pressure roller 12 and the anilox roller 13, which are also only indicated by dashed lines, the anilox roller gear 15 being mounted on the anilox roller shaft via a freewheel 16.
  • the pressure roller and anilox roller slides perform a long-stroke movement to replace a pressure roller and only a short-stroke movement to move to the "print-down position", in which the cylinders and rollers are moved away from each other, but the teeth of which are still loose with one another are engaged.
  • the anilox roller 13 usually continues to run at a lower speed in the print-down position than in the printing operation, in order to prevent the printing ink from drying in or drying out during shorter printing interruptions.
  • This continuous drive consists of the servo motor 17, which drives the anilox roller 13 via the left-hand shaft journal via the gear stage consisting of the gears 18, 19 and the freewheel 20.
  • This continuous drive is possible because the anilox roller 13 can be rotated in one direction because of the right freewheel 16 even when the anilox roller gear 15 is blocked.
  • the forward drive does not hinder the drive of the anilox roller 13 via the central wheel 4 and the pressure roller gear 14 in normal printing operation, because the drive gear 19 is also supported via a freewheel 20 on the left-hand shaft journal of the anilox roller 13.
  • This flushing inking unit consists of a doctor blade carrier 21 which can be adjusted to the anilox roller 13 and which consists of a profiled strip.
  • the bar of the doctor blade carrier 21 is provided with a channel forming the interior of the ink chamber.
  • a bore 22 feeding the printing ink opens into this gutter in the central region.
  • bores 23 and 24 for discharging the printing ink.
  • the end faces of the gutter edges of the doctor blade carrier are chamfered in opposite directions in a roof shape. Doctor blades are attached to these end faces, which can be adjusted to the anilox roller 13 by brushing or brushing.
  • Doctor devices of this type are known, for example, from German patent applications 195 16 223.3 and 195 16 224.2, to which reference is made for a more detailed description of the doctor device.
  • doctor roller with during the rinsing for the purpose of cleaning the doctor device high speed that is at a speed which is above the speed during printing operation, is driven one or more times in the opposite direction of rotation.
  • the object of the invention is to provide a printing machine of the type specified in the introduction, in which the anilox roller can be driven reversibly both for the purpose of continuing to run at a lower running speed compared to the operating speed and for the purpose of rinsing the doctor device at a higher speed than the operating speed .
  • this object is achieved in a printing press of the type specified at the outset in that the anilox roller can be coupled to the anilox roller gear by a switchable clutch and can be coupled to a speed-variable and reversible anilox roller drive by a second switchable clutch. Since in the printing machine according to the invention the anilox roller gear is not connected to the shaft journal of the anilox roller by a free-wheel, but to this via a switchable coupling, the anilox roller can be operated in both directions of rotation in any direction independently of the printing machine drive and also when the printing machine is at a standstill Drive speed, i.e. both with the lower continuous speed and with the higher speed for rinsing.
  • DE-PS 34 37 216 it has been described that it is a particular problem in printing machines and especially flexographic printing machines to align them with each other after changing the forme cylinders.
  • a further object of the invention is therefore to create a printing press, preferably a flexographic printing press, according to the preamble of claim 2, in which a simple appropriate alignment of the printing cylinders after changing them is possible.
  • this object is achieved in that only the pressure roller gear can be coupled by parallel displacement with the impression cylinder gear and that the anilox roller is provided with its own controllable, speed-variable and reversible drive and can be coupled to the pressure roller gear by means of a gear.
  • the printing rollers are driven by the central wheel with which the printing roller gears mesh during printing operation.
  • the anilox roller is also driven in printing operation by the anilox roller drive, and the speed of the anilox roller can be controlled by a computer.
  • the drive motor for the anilox roller drive expediently consists of a stepper motor.
  • the anilox roller can thus be driven at the same peripheral speed as the printing roller.
  • the latter can be driven at the desired lower running speed.
  • the anilox roller can be reversibly driven at the higher speeds, for example with at a higher speed than that during printing.
  • a particular advantage of this embodiment according to the invention is that the anilox roller drives can be used after a change of the printing cylinders to align the printing cylinders of the several printing units with each other in a register-appropriate manner.
  • the impression cylinder gearwheels are provided with a mark, for example an identification hole, by means of which the impression cylinder can be turned into a basic position in relation to the printing press frame.
  • the anilox roller drives start the individual printing cylinders into positions in which they are aligned to each other.
  • the individual stepper motors of the anilox roller drives are controlled by a computer in which the basic positions and the individual angles of rotation for aligning the printing rollers are stored in their appropriate positions.
  • the printing roller gear is brought into coupling engagement with a gear of the anilox roller.
  • the coupling and uncoupling of the anilox roller gear with the printing roller gear is expediently carried out by axially displacing one of these gears.
  • the computer ensures that the gears engage in the correct angle without teeth colliding.
  • the anilox roller is in turn provided with its own controllable, speed-variable and reversible drive and that the printing roller gear can only be coupled to the anilox roller gear and the anilox roller gear by a switchable clutch from the Anilox roller is detachable.
  • the printing roller in printing operation is no longer driven by the central wheel driving the impression cylinder, but rather via the anilox roller drive. All of the advantages of the printing press according to the second embodiment of the invention can be achieved by this configuration.
  • a speed deviating from the peripheral speed of the impression cylinder can be issued via the anilox roller drive during the printing operation of the printing roller, so that, due to the relative speed that can be achieved thereby, unwinding errors of the web to be printed can be compensated for.
  • the print image can be stretched in the circumferential direction by a slower rotation of the printing cylinder and compressed by a higher speed.
  • FIGS. 1 to 6 designate identical parts of a known flexographic printing machine according to FIG. 7, the same reference symbols are used.
  • the drive according to FIGS. 1 and 2 differs from the drive described with reference to FIG. 7 in that the anilox roller gear 15 with the right-hand shaft journal of the anilox roller 13 by a switchable clutch 20 and the motor 31 with the pinion 18 of the gear stage 18, 19 can be connected by a second switchable coupling 32. Furthermore, a rinse inking unit 34 can be set on the anilox roller 13, as has been described with reference to FIG. 8.
  • Fig. 1 the drive is shown in a position in which the carriages supporting the printing roller 12 and the anilox roller 13 have been moved away from the impression cylinder 3 by wide-stroke movements to such an extent that the printing roller gear no longer engages with the central wheel 4 and the anilox roller gear 15 is no longer in engagement with the pressure roller gear 14, so that the pressure roller 12 could be lifted to change it.
  • the anilox roller 13 can be driven with the main drive at a standstill during the washing or rinsing process via the motor 31 in a reversing manner at a speed which is above the speed during the printing operation.
  • the Clutch 32 engaged via the central printing press control so that the motor 31 running in both directions of rotation drives the anilox roller 13 at the desired speed in the desired direction of rotation via the gear stage 18, 19.
  • the anilox roller 13 would be able to be driven both at a lower running speed and at a higher speed during the rinsing process when the main drive is at a standstill, since the Anilox roller 13 is uncoupled from the anilox roller gear 15 by the first clutch 30.
  • the anilox roller gear 15 is coupled to the anilox roller 13 by closing the clutch 30 and the motor 31 is uncoupled by opening the clutch 32, which could also be arranged elsewhere.
  • the state of the drive during printing is shown in FIG. 2.
  • the motor 31 can be controlled by the central machine control, for example a computer, and is designed to be stronger in accordance with the higher requirements to be met.
  • the right-hand shaft journal of the anilox roller 13 is provided with a gearwheel 41, which can be brought into engagement with the teeth of the gearwheel 41 only by axial displacement after the disengagement of the gearwheels 4 and 14 and corresponding movement or alignment of the printing roller 12 and the anilox roller 13 , so that the anilox roller drive of the forme cylinder 12 can be aligned with the printing rollers of the other printing units after a change to the presetting of the registers.
  • the pressure roller gear 14 is brought out of engagement with the gear 41 of the anilox roller again by axial displacement and the pressure roller is moved into its printing position against the impression cylinder 3 so that the toothings 4, 14 come into engagement with one another in the correct position.
  • a third embodiment of the drive according to the invention can be seen, which differs from the embodiment according to FIGS. 3 and 4 essentially only in that even during the printing operation, the drive of the printing roller 12 via the servo motor 50 for driving the anilox roller 13 takes place.
  • the central wheel 51 is therefore designed with a correspondingly smaller diameter, so that it no longer comes into engagement with the printing roller gear 14 during printing operation.
  • the anilox roller gear 15 can be uncoupled from the anilox roller gear 15 by means of a clutch 52.
  • the pressure roller gear 14 can be brought into and out of engagement with the anilox roller gear 14 by appropriate axial displacement on a multi-spline shaft journal, which is necessary in order to make a presetting to bring all the printing rollers into their basic positions, in which they are aligned in their angles of rotation with respect to the machine frame due to the identification marks.
  • the servomotors for the anilox roller drives are selected in such a way that their performance corresponds to the requirements placed on them and can be controlled by the machine control for the angular adjustment of the printing rollers.
  • the invention has only been described above on a printing unit of a flexographic printing press. The same applies, however, to the other printing units in multi-color printing machines.

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

Abstract

The machine comprises a frame containing a driven impression roller, a printing roller movable against it, and an inking or screen roller, movable against the printing roller. The impression, printing and screen rollers have coaxial driving gearwheels. The screen roller has a further drive mechanism for onward transmission, and by parallel sliding movement of the printing and screen rollers. A first clutch couples the screen roller (13) to its gearwheel, and a second one to a variable-speed and reversible drive mechanism. Parallel sliding movement can be used only to couple the impression and printing cylinder gearwheels to each other, while the screen roller has its own variable-speed and reversible controllable drive mechanism, being coupled by a gearwheel to that of the printing roller, by sliding one of them in the axial direction.

Description

Die Erfindung betrifft eine Druckmaschine, vorzugsweise Flexodruckmaschine, mit einem in einem Druckmaschinengestell gelagerten Gegendruckzylinder, der mit einem Antrieb versehen ist, und mit mindestens einem Druckwerk, das aus einer angetriebenen, an den Gegendruckzylinder anstellbaren Druckwalze und aus einer an die Druckwalze anstellbaren Farbauftrags- oder Rasterwalze besteht, die mit einem Spülfarbwerk zusammenwirkt, wobei der Gegendruckzylinder, die Druck- und Rasterwalze jeweils gleichachsig Zahnräder zu ihren Antrieb aufweisen, die Rasterwalze mit einem besonderen Weiterlaufantrieb versehen ist und wobei jeweils durch Parallelverschiebung der Druckwalze und der Rasterwalze das Druckwalzenzahnrad mit dem Gegendruckzylinderzahnrad und das Rasterwalzenzahnrad mit dem Druckwalzenzahnrad kuppelbar sind.The invention relates to a printing press, preferably a flexographic printing press, with an impression cylinder mounted in a printing press frame, which is provided with a drive, and with at least one printing unit, which consists of a driven printing roller that can be adjusted to the impression cylinder and an ink application or Anilox roller exists, which interacts with a flushing inking unit, the impression cylinder, the printing and anilox roller each having coaxial gears for their drive, the anilox roller is provided with a special continuous drive and the printing roller gearwheel with the impression cylinder gearwheel and in each case by parallel displacement of the printing roller and the anilox roller the anilox roller gear can be coupled to the printing roller gear.

Eine Flexodruckmaschine dieser Art ist beispielsweise aus der DE-PS 34 37 216 bekannt. Anhand der Fig. 7 der Zeichnung wird nachstehend kurz der Antrieb des Gegendruckzylinders und der Antrieb der Druckwalze und der Rasterwalze nur eines Druckwerks der bekannten Druckmaschine beschrieben.A flexographic printing machine of this type is known for example from DE-PS 34 37 216. 7 of the drawing, the drive of the impression cylinder and the drive of the printing roller and the anilox roller of only one printing unit of the known printing press will be briefly described below.

In den Seitenteilen 1, 2 des Druckmaschinengestells sind die Wellenzapfen des Gegendruckzylinders 3 gelagert, die nur durch die gestrichelte Mittellinie angedeutet sind. Auf den rechten Wellenzapfen des Gegendruckzylinders 3 ist das Zentralrad 4 aufgekeilt. Das Zentralrad 4 wird von dem Hauptantriebsmotor 5, bei dem es sich um einen Elektromotor handelt, über das Abtriebsritzel 6 und die Zwischenzahnräder 7 bis 10, die entsprechenden Getriebestufen bilden, angetrieben. Die Zahnräder 8 und 9 sind auf eine gestrichelt angedeutete Welle 11 aufgekeilt, die ebenfalls im Druckmaschinengestell gelagert ist.In the side parts 1, 2 of the printing press frame, the shaft journals of the impression cylinder 3 are mounted, which are only indicated by the dashed center line. The central wheel 4 is keyed onto the right-hand shaft journal of the impression cylinder 3. The central wheel 4 is driven by the main drive motor 5, which is an electric motor, via the output pinion 6 and the intermediate gear wheels 7 to 10, which form the corresponding gear stages. The gears 8 and 9 are wedged onto a shaft 11 indicated by dashed lines, which is also mounted in the printing machine frame.

Die Druckwalze 12 und die Rasterwalze 13 sind in Lagerböcken von auf Konsolen des Druckmaschinengestells verschieblich geführten Schlitten gelagert, wie dies in der DE-PS 34 37 216 beschrieben worden ist. Auf die rechten, die Lagerböcke durchsetzenden Wellenzapfen der Druckwalze 12 und der Rasterwalze 13, die ebenfalls nur durch gestrichelte Linien angedeutet sind, sind das Druckwalzenzahnrad 14 und das Rasterwalzenzahnrad 15 aufgesetzt, wobei das Rasterwalzenzahnrad 15 über einen Freilauf 16 auf dem Rasterwalzenwellenzapfen gelagert ist. Durch Verfahren des Druckwalzenschlittens und des Rasterwalzenschlittens können die Verzahnungen des Zentralrades 4 und des Druckwalzenzahnrades 14 sowie des Druckwalzenzahnrades 14 und des Rasterwalzenzahnrades 15 in und außer Eingriff gebracht werden. Dabei führen die Druckwalzen- und Rasterwalzenschlitten zum Auswechseln einer Druckwalze eine weithubige Bewegung und Zum Verfahren in die "Druck-Ab-Stellung" nur eine kurzhubige Bewegung aus, bei der die Zylinder und Walzen zwar voneinander abgerückt sind, deren Verzahnungen sich aber noch lose miteinander im Eingriff befinden.The printing roller 12 and the anilox roller 13 are mounted in bearing blocks of carriages which are displaceably guided on consoles of the printing machine frame, as has been described in DE-PS 34 37 216. The pressure roller gear 14 and the anilox roller gear 15 are placed on the right, through the bearing blocks of the pressure roller 12 and the anilox roller 13, which are also only indicated by dashed lines, the anilox roller gear 15 being mounted on the anilox roller shaft via a freewheel 16. By moving the printing roller carriage and the anilox roller carriage, the toothings of the central wheel 4 and the printing roller gear 14 as well as the printing roller gear 14 and the anilox roller gear 15 can be brought into and out of engagement. The pressure roller and anilox roller slides perform a long-stroke movement to replace a pressure roller and only a short-stroke movement to move to the "print-down position", in which the cylinders and rollers are moved away from each other, but the teeth of which are still loose with one another are engaged.

Üblicherweise läuft die Rasterwalze 13 in der Druck-Ab-Stellung noch mit einer geringeren Drehzahl als beim Druckbetrieb weiter, um bei kürzeren Druckunterbrechungen ein Ein- oder Antrocknen der Druckfarbe zu verhindern. Dieser Weiterlaufantrieb besteht aus dem Servomotor 17, der über die aus den Zahnrädern 18, 19 bestehende Getriebestufe und den Freilauf 20 die Rasterwalze 13 über den linken Wellenzapfen antreibt. Dieser Weiterlauf-Antrieb ist möglich, weil die Rasterwalze 13 wegen des rechten Freilaufs 16 auch bei blockiertem Rasterwalzenzahnrad 15 in einer Richtung gedreht werden kann. Der Weiterlaufantrieb behindert bei normalem Druckbetrieb den Antrieb der Rasterwalze 13 über das Zentralrad 4 und das Druckwalzenzahnrad 14 nicht, weil auch das Antriebszahnrad 19 über einen Freilauf 20 auf dem linken Wellenzapfen der Rasterwalze 13 gelagert ist.The anilox roller 13 usually continues to run at a lower speed in the print-down position than in the printing operation, in order to prevent the printing ink from drying in or drying out during shorter printing interruptions. This continuous drive consists of the servo motor 17, which drives the anilox roller 13 via the left-hand shaft journal via the gear stage consisting of the gears 18, 19 and the freewheel 20. This continuous drive is possible because the anilox roller 13 can be rotated in one direction because of the right freewheel 16 even when the anilox roller gear 15 is blocked. The forward drive does not hinder the drive of the anilox roller 13 via the central wheel 4 and the pressure roller gear 14 in normal printing operation, because the drive gear 19 is also supported via a freewheel 20 on the left-hand shaft journal of the anilox roller 13.

Bei der erfindungsgemäßen Druckmaschine ist an die Rasterwalze 13 ein Spülfarbwerk angedrückt, das in der DE-Patentanmeldung 195 48 535.1 vom 22.12.1995 näher erläutert worden ist.In the printing press according to the invention, a rinse inking unit is pressed onto the anilox roller 13, which was explained in more detail in DE patent application 195 48 535.1 of December 22, 1995.

Dieses Spülfarbwerk besteht, wie anhand der Fig. 8 kurz erläutert wird, aus einem an die Rasterwalze 13 anstellbaren Rakelmesserträger 21, der aus einer Profilleiste besteht. Die Leiste des Rakelmesserträgers 21 ist mit einer den Farbkammerinnenraum bildenden Rinne versehen. In diese Rinne mündet im mittleren Bereich eine die Druckfarbe zuführende Bohrung 22. In den unteren Endbereichen der Rinne befinden sich die Druckfarbe abführende Bohrungen 23 und 24. Die Stirnseiten der Rinnenränder des Rakelmesserträgers sind gegensinnig dachförmig abgeschrägt. Auf diesen Stirnflächen sind Rakelmesser befestigt, die schabend bzw. streichend an die Rasterwalze 13 anstellbar sind. An den Seiten des Rakelmesserträgers sind Dichtungen angeordnet, die den Farbkammerinnenraum gegenüber der Rasterwalze 13 abdichten. Rakelvorrichtungen dieser Art sind beispielsweise aus den deutschen Patentanmeldungen 195 16 223.3 und 195 16 224.2 bekannt, auf die zur näheren Beschreibung der Rakelvorrichtung Bezug genommen wird.This flushing inking unit, as will be briefly explained with reference to FIG. 8, consists of a doctor blade carrier 21 which can be adjusted to the anilox roller 13 and which consists of a profiled strip. The bar of the doctor blade carrier 21 is provided with a channel forming the interior of the ink chamber. A bore 22 feeding the printing ink opens into this gutter in the central region. In the lower end regions of the gutter there are bores 23 and 24 for discharging the printing ink. The end faces of the gutter edges of the doctor blade carrier are chamfered in opposite directions in a roof shape. Doctor blades are attached to these end faces, which can be adjusted to the anilox roller 13 by brushing or brushing. Seals are arranged on the sides of the doctor blade carrier and seal the interior of the ink chamber from the anilox roller 13. Doctor devices of this type are known, for example, from German patent applications 195 16 223.3 and 195 16 224.2, to which reference is made for a more detailed description of the doctor device.

In der aus der deutschen Patentanmeldung 195 48 535.1 bekannten Rakelvorrichtung ist vorgesehen, daß während der Spülung zum Zwecke der Reinigung der Rakelvorrichtung die Rakelwalze mit hoher Drehzahl, also mit einer Drehzahl, die über der Drehzahl beim Druckbetrieb liegt, ein- oder mehrmals mit entgegengesetzter Drehrichtung angetrieben wird.In the doctor device known from German patent application 195 48 535.1 it is provided that the doctor roller with during the rinsing for the purpose of cleaning the doctor device high speed, that is at a speed which is above the speed during printing operation, is driven one or more times in the opposite direction of rotation.

Aufgabe der Erfindung ist es, eine Druckmaschine der eingangs angegebenen Art zu schaffen, bei der sich die Rasterwalze sowohl zum Zwecke des Weiterlaufs mit einer gegenüber der Betriebsdrehzahl geringeren Weiterlaufdrehzahl als auch zum Zwecke des Spülens der Rakelvorrichtung mit einer gegenüber der Betriebsdrehzahl erhöhten Drehzahl reversierend antreiben läßt.The object of the invention is to provide a printing machine of the type specified in the introduction, in which the anilox roller can be driven reversibly both for the purpose of continuing to run at a lower running speed compared to the operating speed and for the purpose of rinsing the doctor device at a higher speed than the operating speed .

Erfindungsgemäß wird diese Aufgabe bei einer Druckmaschine der eingangs angegeben Art dadurch gelöst, daß die Rasterwalze durch eine schaltbare Kupplung mit dem Rasterwalzenzahnrad kuppelbar und durch eine zweite schaltbare Kupplung mit einem geschwindigkeitsvariablen und reversierbaren Rasterwalzenantrieb kuppelbar ist. Da bei der erfindungsgemäßen Druckmaschine das Rasterwalzenzahnrad nicht durch einen Freilauf mit dem Wellenzapfen der Rasterwalze, sondern mit diesem über eine schaltbare Kupplung verbunden ist, läßt sich die Rasterwalze unabhängig von dem Druckmaschinenantrieb und auch bei einem Stillstand der Druckmaschine über den Rasterwalzenantrieb in beiden Drehrichtungen mit beliebiger Drehzahl antreiben, also sowohl mit der geringeren Weiterlaufdrehzahl als auch mit der höheren Drehzahl zum Spülen.According to the invention, this object is achieved in a printing press of the type specified at the outset in that the anilox roller can be coupled to the anilox roller gear by a switchable clutch and can be coupled to a speed-variable and reversible anilox roller drive by a second switchable clutch. Since in the printing machine according to the invention the anilox roller gear is not connected to the shaft journal of the anilox roller by a free-wheel, but to this via a switchable coupling, the anilox roller can be operated in both directions of rotation in any direction independently of the printing machine drive and also when the printing machine is at a standstill Drive speed, i.e. both with the lower continuous speed and with the higher speed for rinsing.

In der DE-PS 34 37 216 ist beschrieben worden, daß es bei Druckmaschinen und speziell Flexodruckmaschinen ein besonderes Problem ist, nach einem Wechsel der Formzylinder diese passergerecht zueinander auszurichten.In DE-PS 34 37 216 it has been described that it is a particular problem in printing machines and especially flexographic printing machines to align them with each other after changing the forme cylinders.

Eine weitere Aufgabe der Erfindung besteht daher darin, eine Druckmaschine, vorzugsweise Flexodruckmaschine, nach dem Oberbegriff des Patentanspruchs 2 zu schaffen, bei der eine einfache passergerechte Ausrichtung der Druckzylinder nach deren Wechsel möglich ist.A further object of the invention is therefore to create a printing press, preferably a flexographic printing press, according to the preamble of claim 2, in which a simple appropriate alignment of the printing cylinders after changing them is possible.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß nur das Druckwalzenzahnrad durch Parallelverschiebung mit dem Gegendruckzylinderzahnrad kuppelbar ist und daß die Rasterwalze mit einem eigenen steuerbaren, geschwindigkeitsvariablen und reversierbaren Antrieb versehen und durch ein Zahnrad mit dem Druckwalzenzahnrad kuppelbar ist.According to the invention this object is achieved in that only the pressure roller gear can be coupled by parallel displacement with the impression cylinder gear and that the anilox roller is provided with its own controllable, speed-variable and reversible drive and can be coupled to the pressure roller gear by means of a gear.

Bei dieser erfindungsgemäßen Ausgestaltung der Druckmaschine werden während des Druckbetriebes nur noch die Druckwalzen von dem Zentralrad angetrieben, mit dem die Druckwalzenzahnräder kämmen. Die Rasterwalze wird auch im Druckbetrieb über den Rasterwalzenantrieb angetrieben, wobei die Drehzahl der Rasterwalze über einen Rechner gesteuert werden kann. Um eine einfache und genaue Steuerung der Drehzahl zu ermöglichen, besteht der Antriebsmotor für den Rasterwalzenantrieb zweckmäßigerweise aus einem Schrittmotor.In this embodiment of the printing press according to the invention, only the printing rollers are driven by the central wheel with which the printing roller gears mesh during printing operation. The anilox roller is also driven in printing operation by the anilox roller drive, and the speed of the anilox roller can be controlled by a computer. In order to enable simple and precise control of the speed, the drive motor for the anilox roller drive expediently consists of a stepper motor.

Während des Druckbetriebes läßt sich somit die Rasterwalze mit gleicher Umfangsgeschwindigkeit wie die Druckwalze antreiben. Darüberhinaus ist es auch möglich, während des Druckbetriebes die Rasterwalze mit höherer oder geringerer Umfangsgeschwindigkeit als der der Druckwalze anzutreiben, so daß dadurch der Farbauftrag auf die Druckwalze gesteuert werden kann.During the printing operation, the anilox roller can thus be driven at the same peripheral speed as the printing roller. In addition, it is also possible to drive the anilox roller at a higher or lower peripheral speed than that of the printing roller during printing operation, so that the ink application to the printing roller can be controlled thereby.

Während des Druck-Ab-Betriebes, bei dem also die Rasterwalze nicht an die Druckwalze angestellt ist, kann diese mit der gewünschten geringeren Weiterlaufdrehzahl angetrieben werden.During the print-down operation, in which the anilox roller is not in contact with the printing roller, the latter can be driven at the desired lower running speed.

Während des Spülvorganges läßt sich die Rasterwalze reversierend mit den höheren Drehzahlen antreiben, also beispielsweise mit einer höheren Drehzahl als der beim Druckbetrieb.During the rinsing process, the anilox roller can be reversibly driven at the higher speeds, for example with at a higher speed than that during printing.

Ein besonderer Vorteil dieser erfindungsgemäßen Ausgestaltung besteht darin, daß die Rasterwalzenantriebe nach einem Wechsel der Druckzylinder dazu benutzt werden können, um die Druckzylinder der mehreren Druckwerke passergerecht zueinander auszurichten. Zu diesem Zweck sind die Druckzylinderzahnräder mit einer Marke, beispielsweise einer Kennbohrung, versehen, über die sich der Druckzylinder gegenüber dem Druckmaschinengestell in eine Grundposition drehen läßt. Ausgehend von dieser Grundposition drehen die Rasterwalzenantriebe die einzelnen Druckzylinder in Stellungen, in denen diese passergerecht zueinander ausgerichtet sind. Dabei erfolgt die Steuerung der einzelnen Schrittmotore der Rasterwalzenantriebe durch einen Rechner, in dem die Grundpositionen und die einzelnen Drehwinkel zur Ausrichtung der Druckwalzen in ihre passergerechten Stellungen gespeichert sind.A particular advantage of this embodiment according to the invention is that the anilox roller drives can be used after a change of the printing cylinders to align the printing cylinders of the several printing units with each other in a register-appropriate manner. For this purpose, the impression cylinder gearwheels are provided with a mark, for example an identification hole, by means of which the impression cylinder can be turned into a basic position in relation to the printing press frame. Starting from this basic position, the anilox roller drives turn the individual printing cylinders into positions in which they are aligned to each other. The individual stepper motors of the anilox roller drives are controlled by a computer in which the basic positions and the individual angles of rotation for aligning the printing rollers are stored in their appropriate positions.

Aufgrund der hohen Rechnerleistungen ist es auch möglich, die erforderlichen Einstellungen bei laufender Druckmaschine vorzunehmen und nach passergerechter Ausrichtung der einzelnen Druckwalzenzahnräder diese winkelgerecht und eingriffsgenau in den Eingriff mit der Verzahnung des Zentralrades zu bringen.Due to the high computing power, it is also possible to make the necessary settings while the printing press is running and, after the individual printing roller gears have been correctly aligned, to bring them into engagement with the toothing of the central wheel in a manner that is accurate and in accordance with the engagement.

Zum Zwecke der passergenauen Einrichtung der einzelnen Druckwalzen bzw. der Druckwalzenzahnräder wird das Druckwalzenzahnrad in kuppelnden Eingriff mit einem Zahnrad der Rasterwalze gebracht. Zweckmäßigerweise erfolgt die Kupplung und Entkupplung des Rasterwalzenzahnrades mit dem Druckwalzenzahnrad durch Axialverschiebung eines dieser Zahnräder. Auch hierbei stellt der Rechner sicher, daß ein winkelrichtiger Eingriff der Zahnräder erfolgt, ohne daß Zähne aufeinanderstoßen.For the purpose of precise registration of the individual printing rollers or the printing roller gears, the printing roller gear is brought into coupling engagement with a gear of the anilox roller. The coupling and uncoupling of the anilox roller gear with the printing roller gear is expediently carried out by axially displacing one of these gears. Here, too, the computer ensures that the gears engage in the correct angle without teeth colliding.

Nach einer dritten erfinderischen Ausgestaltung ist bei einer Druckmaschine nach dem Oberbegriff des Patentanspruchs 2 vorgesehen, daß die Rasterwalze wiederum mit einem eigenen steuerbaren, geschwindigkeitsvariablen und reversierbaren Antrieb versehen ist und daß das Druckwalzenzahnrad nur mit dem Rasterwalzenzahnrad kuppelbar und das Rasterwalzenzahnrad durch eine schaltbare Kupplung von der Rasterwalze lösbar ist.According to a third inventive embodiment, it is provided in a printing machine according to the preamble of claim 2 that the anilox roller is in turn provided with its own controllable, speed-variable and reversible drive and that the printing roller gear can only be coupled to the anilox roller gear and the anilox roller gear by a switchable clutch from the Anilox roller is detachable.

Bei dieser erfinderischen Weiterbildung des erfindungsgemäßen Druckwerks wird die Druckwalze im Druckbetrieb nicht mehr von dem den Gegendruckzylinder antreibenden Zentralrad angetrieben, sondern über den Rasterwalzenantrieb. Durch diese Ausgestaltung lassen sich sämtliche Vorteile der Druckmaschine nach der zweiten erfindungsgemäßen Ausgestaltung erreichen. Zusätzlich kann während des Druckbetriebes der Druckwalze über den Rasterwalzenantrieb eine von der Umfangsgeschwindigkeit des Gegendruckzylinders abweichende Geschwindigkeit erteilt werden, so daß aufgrund der dadurch erzielbaren Relativgeschwindigkeit Abwicklungsfehler der zu bedruckenden Bahn ausgeglichen werden können. Durch eine langsamere Drehung des Druckzylinders kann das Druckbild in Umfangsrichtung gestreckt und durch eine höhere Drehzahl gestaucht werden.In this inventive development of the printing unit according to the invention, the printing roller in printing operation is no longer driven by the central wheel driving the impression cylinder, but rather via the anilox roller drive. All of the advantages of the printing press according to the second embodiment of the invention can be achieved by this configuration. In addition, a speed deviating from the peripheral speed of the impression cylinder can be issued via the anilox roller drive during the printing operation of the printing roller, so that, due to the relative speed that can be achieved thereby, unwinding errors of the web to be printed can be compensated for. The print image can be stretched in the circumferential direction by a slower rotation of the printing cylinder and compressed by a higher speed.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig. 1
den Antrieb des Gegendruckzylinders und der Druck- und Rasterwalze eines von mehreren Druckwerken einer Flexodruckmaschine, und zwar in einer Stellung, in der die den Druckzylinder und die Rasterwalze lagernden Schlitten soweit abgefahren sind, daß der Druckzylinder zum Zwecke seines Austausches ausgehoben werden kann, nach einer ersten Ausführungsform der Erfindung in schematischer Darstellung,
Fig. 2
eine der Fig. 1 entsprechende Darstellung, in der sich die Druckwalze und die Rasterwalze in der Druck-An-Stellung befinden,
Fig. 3
eine Abwandlung des Antriebes nach den Fig. 1 und 2 nach einer zweiten erfindungsgemäßen Ausführungsform, in der sich die Druckwalze und die Rasterwalze in der Druck-Ab-Stellung befinden,
Fig. 4
eine der Fig. 3 entsprechende Darstellung, in der das Druckwalzenzabnrad durch Parallelverschiebung der Druckwalze außer Eingriff mit der Verzahnung des Zentralrades und durch Axialverschiebung in Eingriff mit der Verzahnung der Rasterwalze gebracht worden ist,
Fig. 5
eine der Fig. 1 entsprechende Darstellung des Antriebes nach einer dritten Ausführungsform der Erfindung, in der sich die Druckwalze und die Rasterwalze in der Druck-An-Stellung befinden,
Fig. 6
eine der Fig. 5 entsprechende Darstellung des Antriebes, in der die Druckwalze und die Rasterwalze durch Weithubbewegungen von dem Gegendruckzylinder abgefahren worden sind,
Fig. 7
eine der Fig. 1 entsprechende Darstellung eines bekannten Antriebes und
Fig. 8
eine schematische perspektivische Darstellung eines Gegendruckzylinders sowie einer Druckwalze und einer Rasterwalze mit Spülfarbwerk.
Embodiments of the invention are explained below with reference to the drawing. In this shows
Fig. 1
the drive of the impression cylinder and the printing and anilox roller of one of several printing units of a flexographic printing machine, in a position in which the slides supporting the printing cylinder and anilox roller have moved so far that the printing cylinder can be lifted out for the purpose of its replacement a first embodiment of the invention in a schematic representation,
Fig. 2
1 corresponding representation in which the printing roller and the anilox roller are in the print-on position,
Fig. 3
1 and 2 according to a second embodiment of the invention, in which the printing roller and the anilox roller are in the print-down position,
Fig. 4
3 shows a representation corresponding to FIG. 3, in which the pressure roller wheel has been brought out of engagement with the toothing of the central wheel by parallel displacement of the pressure roller and into engagement with the toothing of the anilox roller by axial displacement,
Fig. 5
1 corresponding representation of the drive according to a third embodiment of the invention, in which the printing roller and the anilox roller are in the print-on position,
Fig. 6
5 shows a representation of the drive in which the printing roller and the anilox roller have been moved away from the impression cylinder by long-stroke movements,
Fig. 7
1 corresponding representation of a known drive and
Fig. 8
is a schematic perspective view of an impression cylinder and a printing roller and an anilox roller with rinsing inking unit.

Anhand der Fig. 1 und 2 wird nun der Antrieb des Gegendruckzylinders und der Druckwalze sowie der Rasterwalze eines von mehreren Druckwerken einer Flexodruckmaschine nach der ersten Ausführungsform der Erfindung beschrieben.1 and 2, the drive of the impression cylinder and the printing roller as well as the anilox roller of one of several printing units of a flexographic printing machine according to the first embodiment of the invention will now be described.

Soweit die Bezugszeichen in den Fig. 1 bis 6 gleiche Teile einer bekannten Flexodruckmaschine nach Fig. 7 bezeichnen, werden dieselben Bezugszeichen verwendet.Insofar as the reference symbols in FIGS. 1 to 6 designate identical parts of a known flexographic printing machine according to FIG. 7, the same reference symbols are used.

Von dem anhand der Fig. 7 beschriebenen Antrieb unterscheidet sich der Antrieb nach den Fig. 1 und 2 dadurch, daS das Rasterwalzenzahnrad 15 mit dem rechten Wellenzapfen der Rasterwalze 13 durch eine schaltbare Kupplung 20 und der Motor 31 mit dem Ritzel 18 der Getriebestufe 18, 19 durch eine zweite schaltbare Kupplung 32 verbindbar ist. Weiterhin ist an die Rasterwalze 13 ein Spülfarbwerk 34 anstellbar, wie es anhand der Fig. 8 beschrieben worden ist.The drive according to FIGS. 1 and 2 differs from the drive described with reference to FIG. 7 in that the anilox roller gear 15 with the right-hand shaft journal of the anilox roller 13 by a switchable clutch 20 and the motor 31 with the pinion 18 of the gear stage 18, 19 can be connected by a second switchable coupling 32. Furthermore, a rinse inking unit 34 can be set on the anilox roller 13, as has been described with reference to FIG. 8.

In Fig. 1 ist der Antrieb in einer Stellung dargestellt, in der die die Druckwalze 12 und die Rasterwalze 13 lagernden Schlitten durch Weithubbewegungen soweit von dem Gegendruckzylinder 3 abgefahren worden sind, daß das Druckwalzenzahnrad nicht mehr im Eingriff mit dem Zentralrad 4 und das Rasterwalzenzahnrad 15 nicht mehr im Eingriff mit dem Druckwalzenzahnrad 14 ist, so daß die Druckwalze 12 zu ihrem Wechsel ausgehoben werden könnte. In der dargestellten Stellung läßt sich die Rasterwalze 13 bei stillstehendem Hauptantrieb während des Wasch- oder Spülvorgangs über den Motor 31 reversierend mit einer Drehzahl antreiben, die über der Drehzahl beim Druckbetrieb liegt. Zu diesem Zwecke ist die Schaltkupplung 32 über die zentrale Druckmaschinensteuerung eingerückt, so daß der in beide Drehrichtungen laufende Motor 31 über die Getriebestufe 18, 19 die Rasterwalze 13 mit der gewünschten Drehzahl in der gewünschten Drehrichtung antreibt.In Fig. 1, the drive is shown in a position in which the carriages supporting the printing roller 12 and the anilox roller 13 have been moved away from the impression cylinder 3 by wide-stroke movements to such an extent that the printing roller gear no longer engages with the central wheel 4 and the anilox roller gear 15 is no longer in engagement with the pressure roller gear 14, so that the pressure roller 12 could be lifted to change it. In the position shown, the anilox roller 13 can be driven with the main drive at a standstill during the washing or rinsing process via the motor 31 in a reversing manner at a speed which is above the speed during the printing operation. For this purpose the Clutch 32 engaged via the central printing press control so that the motor 31 running in both directions of rotation drives the anilox roller 13 at the desired speed in the desired direction of rotation via the gear stage 18, 19.

Selbst wenn die Zahnräder 4, 14, 15 in der Druck-Ab-Stellung noch lose miteinander im Eingriff sein sollten, würde sich bei stillstehenden Hauptantrieb die Rasterwalze 13 sowohl mit einer geringeren Weiterlaufdrehzahl als auch mit einer höheren Drehzahl beim Spülvorgang antreiben lassen, da die Rasterwalze 13 durch die erste Schaltkupplung 30 von dem Rasterwalzenzahnrad 15 abgekuppelt ist.Even if the gears 4, 14, 15 were still loosely engaged with each other in the print-down position, the anilox roller 13 would be able to be driven both at a lower running speed and at a higher speed during the rinsing process when the main drive is at a standstill, since the Anilox roller 13 is uncoupled from the anilox roller gear 15 by the first clutch 30.

Im Druckbetrieb wird durch Schließen der Kupplung 30 das Rasterwalzenzahnrad 15 an die Rasterwalze 13 angekuppelt und der Motor 31 durch Öffnen der Kupplung 32, die auch an anderer Stelle angeordnet sein könnte, abgekuppelt. Der Zustand des Antriebs während des Druckbetriebes ist aus Fig. 2 ersichtlich.In printing operation, the anilox roller gear 15 is coupled to the anilox roller 13 by closing the clutch 30 and the motor 31 is uncoupled by opening the clutch 32, which could also be arranged elsewhere. The state of the drive during printing is shown in FIG. 2.

Der Motor 31 ist durch die zentrale Maschinensteuerung, beispielsweise einen Rechner, steuerbar und entsprechend der höheren an diesen Zu stellenden Anforderungen stärker ausgelegt.The motor 31 can be controlled by the central machine control, for example a computer, and is designed to be stronger in accordance with the higher requirements to be met.

Bei dem zweiten Ausführungsbeispiel des Antriebs nach der Erfindung, die nun anhand der Fig. 3 und 4 beschrieben wird, ist nur das Druckwalzenzahnrad 14 durch Parallelverschiebung des die Druckwalze 12 lagernden Schlittens in Eingriff mit den Zähnen des Zentralrades 4 bringbar. Die Rasterwalze 13 wird aussschließlich durch den Servomotor 40 über die Getriebestufe 18, 19 sowohl während des Druckbetriebes als auch während des Weiterlauf- und Waschbetriebes angetrieben.In the second embodiment of the drive according to the invention, which will now be described with reference to FIGS. 3 and 4, only the pressure roller gear 14 can be brought into engagement with the teeth of the central wheel 4 by parallel displacement of the carriage supporting the pressure roller 12. The anilox roller 13 is driven exclusively by the servo motor 40 via the gear stage 18, 19 both during the printing operation and during the continuous operation and washing operation.

Der rechte Wellenzapfen der Rasterwalze 13 ist mit einem Zahnrad 41 versehen, das sich nach der Entkupplung der Zahnräder 4 und 14 und entsprechendem Zusammenfahren bzw. Ausrichten der Druckwalze 12 und der Rasterwalze 13 nur durch axiales Verschieben in Eingriff mit den Zähnen des Zahnrades 41 bringen läßt, so daß über den Rasterwalzenantrieb der Formzylinder 12 nach einem Wechsel zur Voreinstellung der Passer zu den Druckwalzen der anderen Druckwerke ausgerichtet werden kann.The right-hand shaft journal of the anilox roller 13 is provided with a gearwheel 41, which can be brought into engagement with the teeth of the gearwheel 41 only by axial displacement after the disengagement of the gearwheels 4 and 14 and corresponding movement or alignment of the printing roller 12 and the anilox roller 13 , so that the anilox roller drive of the forme cylinder 12 can be aligned with the printing rollers of the other printing units after a change to the presetting of the registers.

Vor Aufnahme des Druckbetriebes wird das Druckwalzenzahnrad 14 durch Axialverschiebung wieder außer Eingriff mit dem Zahnrad 41 der Rasterwalze gebracht und die Druckwalze wird in ihre Druckstellung an den Gegendruckzylinder 3 herangefahren, so daß die Verzahnungen 4, 14 lagerichtig in Eingriff miteinander kommen.Before printing operation is started, the pressure roller gear 14 is brought out of engagement with the gear 41 of the anilox roller again by axial displacement and the pressure roller is moved into its printing position against the impression cylinder 3 so that the toothings 4, 14 come into engagement with one another in the correct position.

Aus den Fig. 5 und 6 ist eine dritte Ausführungsform des erfindungsgemäßen Antriebes ersichtlich, das sich von dem Ausführungsbeispiel nach den Fig. 3 und 4 im wesentlichen nur dadurch unterscheidet, daß auch während des Druckbetriebes der Antrieb der Druckwalze 12 über den Servomotor 50 zum Antrieb der Rasterwalze 13 erfolgt. Das Zentralrad 51 ist daher mit einem entsprechend kleineren Durchmesser ausgeführt, so daß es im Druckbetrieb nicht mehr in Eingriff mit dem Druckwalzenzahnrad 14 kommt.5 and 6, a third embodiment of the drive according to the invention can be seen, which differs from the embodiment according to FIGS. 3 and 4 essentially only in that even during the printing operation, the drive of the printing roller 12 via the servo motor 50 for driving the anilox roller 13 takes place. The central wheel 51 is therefore designed with a correspondingly smaller diameter, so that it no longer comes into engagement with the printing roller gear 14 during printing operation.

Um die Rasterwalze 13 im Weiterlaufbetrieb und im Spülbetrieb unabhängig von der Druckwalze 12 antreiben zu können, ist das Rasterwalzenzahnrad 15 durch eine Schaltkupplung 52 von dem Rasterwalzenzahnrad 15 abkuppelbar.In order to be able to drive the anilox roller 13 in continuous operation and in the rinsing mode independently of the printing roller 12, the anilox roller gear 15 can be uncoupled from the anilox roller gear 15 by means of a clutch 52.

Weiterhin läßt sich, wie aus Fig. 6 ersichtlich ist, durch entsprechende Axialverschiebung auf einem Vielkeil-Wellenzapfen das Druckwalzenzahnrad 14 in und außer Eingriff mit dem Rasterwalzenzahnrad 14 bringen, was erforderlich ist, um bei einer Voreinstellung sämtlicher Druckwalzen diese in ihre Grundpositionen zu bringen, in denen diese aufgrund von Kennmarken in ihren Drehwinkeln zu dem Maschinengestell ausgerichtet sind.Furthermore, as can be seen from FIG. 6, the pressure roller gear 14 can be brought into and out of engagement with the anilox roller gear 14 by appropriate axial displacement on a multi-spline shaft journal, which is necessary in order to make a presetting to bring all the printing rollers into their basic positions, in which they are aligned in their angles of rotation with respect to the machine frame due to the identification marks.

Die Servomotoren für die Rasterwalzenantriebe werden derart ausgewählt, daß sie in ihrer Leistung den an diese zu stellenden Anforderungen entsprechen und durch die Maschinensteuerung zur winkelgerechten Einstellung der Druckwalzen gesteuert werden können.The servomotors for the anilox roller drives are selected in such a way that their performance corresponds to the requirements placed on them and can be controlled by the machine control for the angular adjustment of the printing rollers.

Die Erfindung ist vorstehend nur an einem Druckwerk einer Flexodruckmaschine beschrieben worden. Entsprechendes gilt jedoch für die weiteren Druckwerke bei Mehrfarben-Druckmaschinen.The invention has only been described above on a printing unit of a flexographic printing press. The same applies, however, to the other printing units in multi-color printing machines.

Claims (4)

Druckmaschine, vorzugsweise Flexodruckmaschine,
mit einem in einem Druckmaschinengestell gelagerten Gegendruckzylinder, der mit einem Antrieb versehen ist, und
mit mindestens einem Druckwerk, das aus einer angetriebenen, an den Gegendruckzylinder anstellbaren Druckwalze und aus einer an die Druckwalze anstellbaren Farbauftrags- oder Rasterwalze besteht, die mit einem Spülfarbwerk zusammenwirkt,
wobei der Gegendruckzylinder, die Druck- und Rasterwalze jeweils gleichachsig Zahnräder zu ihrem Antrieb tragen,
die Rasterwalze mit einem besonderem Weiterlaufantrieb versehen ist und
wobei jeweils durch Parallelverschiebung der Druckwalze und der Rasterwalze das Druckwalzenzahnrad mit dem Gegendruckzylinderzahnrad und das Rasterwalzenzahnrad mit dem Druckwalzenzahnrad kuppelbar sind,
dadurch gekennzeichnet,
daß die Rasterwalze durch eine erste schaltbare Kupplung mit dem Rasterwalzenzahnrad kuppelbar und durch eine zweite schaltbare Kupplung mit einem geschwindigkeitsvariablen und reversierbaren Rasterwalzenantrieb kuppelbar ist.Printing machine, preferably flexographic printing machine,
with a counter-pressure cylinder, which is mounted in a printing machine frame and is provided with a drive, and
with at least one printing unit which consists of a driven printing roller which can be adjusted to the impression cylinder and an inking or anilox roller which can be adjusted to the printing roller and which interacts with a rinsing inking unit,
where the impression cylinder, the printing and anilox roller each carry coaxial gears to drive them,
the anilox roller is provided with a special continuous drive and
wherein the pressure roller gear can be coupled to the impression cylinder gear and the anilox roller gear can be coupled to the pressure roller gear by parallel displacement of the printing roller and the anilox roller,
characterized,
that the anilox roller can be coupled to the anilox roller gear by a first switchable clutch and can be coupled to a speed-variable and reversible anilox roller drive by a second switchable clutch. Druckmaschine, vorzugsweise Flexodruckmaschine, mit einem in einem Druckmaschinengestell gelagerten Gegendruckzylinder, der mit einem Antrieb versehen ist, und mit mehreren Druckwerken, von denen jedes aus einer angetriebenen, an den Gegendruckzylinder anstellbaren Druckwalze und aus einer an die Druckwalze anstellbaren Farbauftrags- oder Rasterwalze besteht, die mit einem Spülfarbwerk zusammenwirkt, wobei der Gegendruckzylinder, die Druck- und Rasterwalzen jeweils gleichachsig Zahnräder zu ihrem Antrieb tragen und die Rasterwalzen mit besonderen Weiterlaufantrieben versehen sind,
dadurch gekennzeichnet,
daß nur das Druckwalzenzahnrad durch Parallelverschiebung mit dem Gegendruckzylinderzahnrad kuppelbar ist und daß die Rasterwalze mit einem eigenen steuerbaren, geschwindigkeitsvariablen und reversierbaren Antrieb versehen und durch ein Zahnrad mit dem Druckwalzenzahnrad kuppelbar ist.Printing machine, preferably a flexographic printing machine, with an impression cylinder mounted in a printing machine frame, which is provided with a drive, and with several printing units, each of which consists of a driven printing roller which can be adjusted to the impression cylinder and an inking or anilox roller which can be adjusted to the printing roller, which interacts with a flushing inking unit, the impression cylinder, the printing and anilox rollers each carrying coaxial gears to drive them and the anilox rollers are provided with special forward drives,
characterized,
that only the printing roller gear can be coupled by parallel displacement with the impression cylinder gear and that the anilox roller is provided with its own controllable, speed-variable and reversible drive and can be coupled to the printing roller gear by means of a gear. Druckmaschine nach Anspruch 2, dadurch gekennzeichnet, daß die Kupplung und Entkupplung des Rasterwalzenzahnrades mit dem Druckwalzenzahnrad durch Axialverschiebung eines dieser Zahnräder erfolgt.Printing machine according to claim 2, characterized in that the coupling and uncoupling of the anilox roller gear with the printing roller gear takes place by axial displacement of one of these gears. Druckmaschine nach dem Oberbegriff des Patentanspruchs 2,
dadurch gekennzeichnet,
daß die Rasterwalze mit einem eigenen steuerbaren, geschwindigkeitsvariablen und reversierbaren Antrieb versehen ist und daß das Druckwalzenzahnrad nur mit dem Rasterwalzenzahnrad kuppelbar und das Rasterwalzenzahnrad durch eine schaltbare Kupplung von der Rasterwalze lösbar ist.Printing machine according to the preamble of claim 2,
characterized,
that the anilox roller is provided with its own controllable, speed-variable and reversible drive and that the printing roller gear can only be coupled to the anilox roller gear and the anilox roller gear can be released from the anilox roller by a switchable clutch.
EP97102078A 1996-03-20 1997-02-10 Printing machine, preferably flexographic press Expired - Lifetime EP0796733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19611048A DE19611048A1 (en) 1996-03-20 1996-03-20 Printing machine, preferably flexographic printing machine
DE19611048 1996-03-20

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EP0796733A1 true EP0796733A1 (en) 1997-09-24
EP0796733B1 EP0796733B1 (en) 1999-12-22

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EP (1) EP0796733B1 (en)
JP (1) JPH1024558A (en)
KR (1) KR970064921A (en)
CN (1) CN1172728A (en)
BR (1) BR9701344A (en)
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0983851A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Short fluid applying unit
EP0983849A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Transfer system
EP0983850A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Method for the influence on the transmission rate
EP1093913A2 (en) * 1999-10-23 2001-04-25 Koenig & Bauer Aktiengesellschaft Device for driving a varnishing unit
DE19840601C2 (en) * 1998-09-05 2001-10-11 Koenig & Bauer Ag Application unit for damp liquid
WO2002024458A1 (en) * 2000-09-20 2002-03-28 Koenig & Bauer Aktiengesellschaft Printing unit
WO2007034159A2 (en) 2005-09-21 2007-03-29 Focus Label Machinery Ltd A printer
WO2014020083A2 (en) * 2012-07-31 2014-02-06 Windmöller & Hölscher Kg Method for setting the printing length of a printed image in a multicolor rotary printing machine

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1305050B1 (en) * 1998-12-04 2001-04-10 Giuseppe Mazzotti PRINTING MACHINE FOR VARIABLE PRINTING FORMATS AND RELATED PRINTING METHODS
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
US6283024B1 (en) * 1999-03-31 2001-09-04 Express Card & Label Co., Inc. Quick change print station for central impression presses
EP1147889A3 (en) * 2000-04-14 2006-01-18 Komori Corporation Roller structure in printing press
EP1197333B1 (en) * 2000-10-13 2006-03-01 Fischer & Krecke GmbH & Co. Flexographic printing press with a washing device for the impression cylinder
US7100507B1 (en) 2000-11-06 2006-09-05 Greydon, Inc. Flexographic rotary platen printing press
US6644185B1 (en) * 2000-11-06 2003-11-11 Greydon Inc. Flexographic rotary platen printing press
US20030070679A1 (en) * 2001-06-01 2003-04-17 Boehringer Ingelheim Pharma Kg Capsules containing inhalable tiotropium
DE10144563A1 (en) 2001-09-11 2003-03-27 Heidelberger Druckmasch Ag Printing press and method for operating an inking unit
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US7207268B2 (en) * 2004-07-30 2007-04-24 Nu Tech Coatings Llc Apparatus and method of enhancing printing press cylinders
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EP1728628A1 (en) * 2005-06-01 2006-12-06 Kba-Giori S.A. Typographic printing machine with independent drive means
US20060272534A1 (en) * 2005-06-03 2006-12-07 Daniel Lieberman Systems and methods for printing surface relief structures
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DE102008000257B4 (en) * 2008-02-08 2010-05-12 Koenig & Bauer Aktiengesellschaft Inking unit of a printing press
DE102008025345A1 (en) * 2008-05-27 2009-12-03 Heidelberger Druckmaschinen Ag Method for operating a printing machine
US20100122638A1 (en) * 2008-11-18 2010-05-20 C.G. Bretting Manufacturing Co., Inc. Flexographic Printing Apparatus And Method
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WO2017218466A1 (en) 2016-06-14 2017-12-21 Sun Chemical Corporation Cleaning solution
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CN107187180B (en) * 2017-07-13 2022-10-14 宁波天弘电力器具有限公司 Printing part of high-precision treadmill printing machine
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143474A (en) * 1983-06-06 1985-02-13 Cruiser Newspaper Components I Printing machine
DE3432572A1 (en) * 1983-09-14 1985-03-28 W.R. Grace & Co., New York, N.Y. ROTARY PRESS PRESS
DE3437216A1 (en) 1984-10-10 1986-04-10 Windmöller & Hölscher, 4540 Lengerich FLEXO PRINTING MACHINE WITH SEVERAL INKS AND FORM CYLINDERS
EP0325445A2 (en) * 1988-01-22 1989-07-26 Cobden Chadwick Limited Printing machines
GB2281534A (en) * 1993-09-07 1995-03-08 Scm Container Mach Ltd A drive system for a printing machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287089B (en) * 1966-10-21 1969-01-16 Albert Schnellpressen Drive for the inking unit of web-fed rotary printing machines
US3709147A (en) * 1970-12-03 1973-01-09 W Granger Ink transfer cylinder mounting with adjustable drive clutch
US5083511A (en) * 1990-05-21 1992-01-28 Paper Converting Machine Company Apparatus and method for printing plate cylinder--impression cylinder registration
DE4308492A1 (en) * 1993-03-17 1994-09-22 Windmoeller & Hoelscher Printing press
DE19516224C2 (en) * 1995-05-03 1997-03-20 Windmoeller & Hoelscher Doctor device for a rinsing inking unit of a rotary printing machine
DE19516223C2 (en) * 1995-05-03 1997-03-20 Windmoeller & Hoelscher Doctor device for a rinsing inking unit of a rotary printing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143474A (en) * 1983-06-06 1985-02-13 Cruiser Newspaper Components I Printing machine
DE3432572A1 (en) * 1983-09-14 1985-03-28 W.R. Grace & Co., New York, N.Y. ROTARY PRESS PRESS
DE3437216A1 (en) 1984-10-10 1986-04-10 Windmöller & Hölscher, 4540 Lengerich FLEXO PRINTING MACHINE WITH SEVERAL INKS AND FORM CYLINDERS
EP0325445A2 (en) * 1988-01-22 1989-07-26 Cobden Chadwick Limited Printing machines
GB2281534A (en) * 1993-09-07 1995-03-08 Scm Container Mach Ltd A drive system for a printing machine

Cited By (16)

* Cited by examiner, † Cited by third party
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DE19840601C2 (en) * 1998-09-05 2001-10-11 Koenig & Bauer Ag Application unit for damp liquid
EP0983851A3 (en) * 1998-09-05 2000-05-17 Koenig & Bauer Aktiengesellschaft Short fluid applying unit
EP0983850A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Method for the influence on the transmission rate
EP0983849A3 (en) * 1998-09-05 2000-05-10 Koenig & Bauer Aktiengesellschaft Transfer system
EP0983851A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Short fluid applying unit
EP0983850A3 (en) * 1998-09-05 2000-05-24 Koenig & Bauer Aktiengesellschaft Method for the influence on the transmission rate
EP0983849A2 (en) * 1998-09-05 2000-03-08 Koenig & Bauer Aktiengesellschaft Transfer system
EP1093913A2 (en) * 1999-10-23 2001-04-25 Koenig & Bauer Aktiengesellschaft Device for driving a varnishing unit
EP1093913A3 (en) * 1999-10-23 2001-09-05 Koenig & Bauer Aktiengesellschaft Device for driving a varnishing unit
WO2002024458A1 (en) * 2000-09-20 2002-03-28 Koenig & Bauer Aktiengesellschaft Printing unit
US6736060B2 (en) 2000-09-20 2004-05-18 Koenig & Bauer Aktiengesellschaft Printing unit
WO2007034159A2 (en) 2005-09-21 2007-03-29 Focus Label Machinery Ltd A printer
WO2007034159A3 (en) * 2005-09-21 2007-10-18 Focus Label Machinery Ltd A printer
WO2014020083A2 (en) * 2012-07-31 2014-02-06 Windmöller & Hölscher Kg Method for setting the printing length of a printed image in a multicolor rotary printing machine
WO2014020083A3 (en) * 2012-07-31 2014-03-27 Windmöller & Hölscher Kg Method for setting the printing length of a printed image in a multicolor rotary printing machine
US9789680B2 (en) 2012-07-31 2017-10-17 Windmoeller & Hoelscher Kg Method for adjusting the print repeat length of a print image in a multicolor rotary printing machine

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EP0796733B1 (en) 1999-12-22
DE19611048A1 (en) 1997-09-25
TW368477B (en) 1999-09-01
KR970064921A (en) 1997-10-13
DE59700870D1 (en) 2000-01-27
JPH1024558A (en) 1998-01-27
CZ51097A3 (en) 1997-10-15
US5787811A (en) 1998-08-04
ES2140924T3 (en) 2000-03-01
BR9701344A (en) 1998-11-10
CN1172728A (en) 1998-02-11

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