EP0812682B1 - Drive for a printing machine - Google Patents

Drive for a printing machine Download PDF

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Publication number
EP0812682B1
EP0812682B1 EP19970106049 EP97106049A EP0812682B1 EP 0812682 B1 EP0812682 B1 EP 0812682B1 EP 19970106049 EP19970106049 EP 19970106049 EP 97106049 A EP97106049 A EP 97106049A EP 0812682 B1 EP0812682 B1 EP 0812682B1
Authority
EP
European Patent Office
Prior art keywords
li
actual position
position values
drive
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19970106049
Other languages
German (de)
French (fr)
Other versions
EP0812682A3 (en
EP0812682A2 (en
Inventor
Albrecht Dipl.-Ing. Völz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland Druckmaschinen AG
Original Assignee
Manroland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
Priority to DE19623223 priority Critical
Priority to DE1996123223 priority patent/DE19623223C2/en
Application filed by Manroland Druckmaschinen AG filed Critical Manroland Druckmaschinen AG
Publication of EP0812682A2 publication Critical patent/EP0812682A2/en
Publication of EP0812682A3 publication Critical patent/EP0812682A3/en
Application granted granted Critical
Publication of EP0812682B1 publication Critical patent/EP0812682B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7796603&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0812682(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/004Electric or hydraulic features of drives
    • B41F13/0045Electric driving devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/70Driving devices associated with particular installations or situations
    • B41P2213/73Driving devices for multicolour presses
    • B41P2213/734Driving devices for multicolour presses each printing unit being driven by its own electric motor, i.e. electric shaft

Description

The invention relates to a drive for a printing press according to the preamble of Claim 1.

In sheet-fed offset printing presses of the type widely used today, the printing unit cylinders are used as well as those which effect sheet transport and are arranged between the printing units Cylinders or drums over a continuous wheel train of one or driven several drive motors in this wheel feed. To a high To achieve print quality, the gears of this gear train must be manufactured with high precision The machining and processing tolerances are very small and must not be exceeded become. With one or more drive motors using a continuous gear train driven cylinders of sheetfed offset presses result in additional and requirements that increase the construction effort. For example, here is that Circumferential and page registers and the adjusting devices necessary to correct them call. The plate cylinder is usually used to correct the circumferential and / or side register adjustable in circumferential and / or lateral register direction (in the axial direction of the cylinder) with respect to the frame walls that support it and also adjustable with respect to the frame that supports it Gear stored. There is a shift in the helical gears used of the plate cylinder gear relative to the gear driving it Rubber blanket cylinder simultaneously causes this plate cylinder gear to rotate, Additional correction devices must be provided here.

For the reasons mentioned above, there is an increasing trend today towards the cylinders or drums in printing machines and in particular sheet-fed offset printing machines To drive individual drives individually or grouped together via gear trains. JP-A-56-21860 is a drive for the cylinders of an offset printing unit known, both the plate, the blanket and the impression cylinder have a single motor. These single drives receive for the purpose of achievement an angular synchronous synchronism a common signal specification (electronic leading axis) and follow these signal requirements. The individual cylinders of such an offset printing unit but must be angularly synchronized with each other with maximum accuracy be what appropriate measures to suppress or compensate for disturbance variables makes necessary. Here there are in particular synchronism deviations due to different ones Mass distribution of the printing unit cylinders, due to the periodically fluctuating Loads when the cylinders roll against each other and possible axial misalignment between the engine and the cylinder axis. Devices for compensation or Suppression of the disturbance variables mentioned above, for example, are in this previously known facility not specified.

DE 4 137 979 A1 describes a drive for a printing press with several printing units known in which the individual printing units or printing unit groups mechanically are decoupled from one another, with each printing unit or each printing unit group Drive motor is assigned and with each printing unit or each printing group a device for determining the speed and / or angle of rotation is arranged. To achieve angular synchronism of these printing units or printing unit groups angle controllers are provided which allow a permissible angle of rotation deviation of the individual Printing units or printing unit groups of a predetermined angle setpoint such dimensioned so that at least in the rotational angle position at which the sheet is transferred, the rotation angle deviation is minimal. With this facility, in particular, irregularities in the sheet transfer from one printing unit to another printing unit or from one printing group to another printing group, which otherwise inevitably leads to doubling effects and color shifts, which adversely affect print quality. As a result, the angle differences that occur between the target and the recorded actual angle value not at every angular position or too adjusted at any time by the angular position controller, but with the highest possible Accuracy only at the time the sheet is handed over. The known drive device The mechanical collision of the gripper bridges in sheet-guiding cylinders is also intended help avoid.

The device according to DE 4 137 979 A1 meets the highest requirements with regard to the manufacturing and signal accuracy of the encoder for determining the angle of rotation in connection with the rotating part to which it is attached. One too only slight misalignment of the encoder or the rotor of this encoder compared to the coupled with it rotating part (cylinder) thus calls a systematic and periodic Repetitive deviation of the actual angular value from that by the encoder delivered angle value. It must also be taken into account in this facility that especially with the cylinders in printing units of sheetfed offset presses during one Rotation strong and periodically repeating load fluctuations occur, which in particular caused by the rolling of the channels of these printing unit cylinders against one another become. Furthermore, in printing units of sheetfed offset printing presses used differently compressible rubber blankets, so that here too the drive torques to be applied by the drive or drives are very different. The color printed in an offset printing unit generates due to their speed additionally high forces or corresponding drive torques, so that the drive power required for an offset printing to operate Torque correlates strongly with the proportion of printing area of the printing form or through the proportion of printing area is influenced. All these influencing factors are with a single drive of cylinders or groups of cylinders, especially of an offset printing unit, the high level of accuracy required for print image generation to achieve important cylinders. Taking into account and compensating accordingly influences mentioned do not occur in the device according to DE 4 137 979 A1.

DE 4 214 394 A1 describes a rotary printing press in the form of a web-fed rotary printing press known which a number of individually driven cylinders with at least has a separately driven folder. The individual drives of the cylinders and their Drive controllers are grouped into pressure point groups and refer to a position reference from the folder. The administration of the pressure point groups is done by a superordinate control system (electronic longitudinal shaft). Because this is a drive system for a web-fed rotary printing press are those for sheet-fed offset printing presses specific synchronism problems not addressed in this prior art or are not included in the proposed solution. It should also be noted that that in rotary printing presses there is no risk of a so-called mechanical Gripper collision exists. The cylinders (plate, blanket, Impression cylinder) in the printing unit of a web offset printing press only very narrow cylinder gaps on, so that those occurring in sheetfed offset presses are very pronounced Torque fluctuations when rolling the printing unit cylinders against each other not occur and accordingly only cause very little interference.

The object of the present invention is therefore to provide a drive according to the preamble of Claim 1 to be expanded in such a way that the above-mentioned disadvantages are avoided as well as taking into account the explained aspects a high and flexible to the Adaptable synchronism accuracy individually driven in the present printing conditions Cylinder or cylinder groups can be achieved.

This problem is solved by the characterizing features of claim 1. Further training the invention emerge from the subclaims.

According to the invention it is provided that the drive controller, which has an associated Power section the motor coupled to the printing unit cylinder according to a predefined position setpoint controls for the detection of an angular position encoder supplied actual position values is assigned a correction device by means of which the Angular position encoder (position of the cylinder) delivered actual position values in predefined, saved or values that can be calculated depending on the actual position values can be changed. At In one embodiment of the invention, the correction device is a Storage device in which the table can be read in directly via the angular position encoder Actual position values are assigned correspondingly modified actual position values, which are then directly be forwarded to the drive controller for position control. This drive controller then performs the position control of the cylinder or motor by forming appropriate Control signals to the power section in connection with, for example, a higher-level Control specified position setpoints. The drive controller therefore leads the Target / actual comparison based on the actual position values modified according to the correction device in Connection with a specified position setpoint and forms the necessary control signals, from which the power section (electronic drive) then receives a corresponding current engine directly coupled to the cylinder.

According to a further embodiment of the invention it can be provided that the correction device is designed as a computing device through which the from the angular position encoder Actual position values formed over the entire angular range or in sections to be modified by certain factors. For example, it can be provided that Within certain angular position ranges, those read in directly via the angular position encoder Actual position values are increased by multiplying by a correspondingly stored factor or be reduced.

Regardless of whether the correction device provided according to the invention is which is connected downstream of the angular position encoder and upstream of the drive controller a storage device or a computing device, it is possible, for example when installing the system (attaching the angular position encoder to the corresponding Determined systematic positional deviations and corresponding Make corrections to compensate for these errors. Here are in particular concentricity caused by inaccuracies to mention or the resulting position error if the rotor of the angular position encoder is not exactly coaxial to the axis of the cylinder runs (e.g. wobble). Can also by the invention provided correction device systematic and based on the measurement principle of Angular position encoder caused angular position deviations are detected and compensated. It can further be provided that the correction device additionally adjusts the speed of movement of the cylinder corresponding signal (speed signal) to supply accordingly the correction speed of the cylinder different correction values Position controller (drive controller) depending on the actual position values read feed. It can thus be taken into account that, for example, that caused in the angular position encoder Dead times or other processing delays of the corresponding signals between the current readable actual position value of the angular position encoder and the actual one Angular position value of the cylinder there is a speed-dependent delay. As a result, another correction or modification is then made at low speeds of the actual position values readable via the angular position encoder than for higher ones Speed values.

As already mentioned above, according to the invention an example is an offset table containing correction device for modifying the one supplied by the angular position encoder Actual position values provided. According to the resolution of the angular position encoder, i.e. the The increment with which the actual position values can be obtained can be reproduced with one turn Path deviations are specified, which means that the drive controller in addition to motor-driven cylinders during a revolution in a predetermined Way ahead or lagging behind the cylinder interacting with it. With others Words this means that the correction device and the position controller (Drive controller) a defined cylinder according to its position Exerts slip over the pressure zone opposite the cylinder interacting with it (e.g. plate cylinder / blanket cylinder or blanket cylinder / impression cylinder), see above that in particular print length compensations of a given size can be carried out. The way in which the angle correction values stored in the offset table of the correction device are stored, is such that there is a homogeneous or steady Concentricity results in a modification with the same after every full revolution Correction value is made.

Print-specific corrections can also be made by the invention. Addressed was the so-called pressure length compensation, which is conventional driven cylinders by placing correspondingly thick washers under the pressure plate and / or the rubber blanket. With an offset printing unit with a rubber blanket cylinder and / or plate cylinder individually driven according to the invention it is possible to save corresponding angular position correction values in the correction device provided according to the invention (offset table), the plate cylinder to drive in such a way with respect to the blanket cylinder, so that exactly the otherwise caused by using differently strong underlay sheets Effect. While the pressure zones of the two cylinders correspond to each other (rolling against each other), for example, the plate cylinder practices compared to the blanket cylinder a leading effect or trailing effect, so that the resulting slip the printed image transferred to the rubber cylinder is correspondingly longer or shorter is printed. The correction device provided according to the invention in the offset table stored correction values are matched to one another in such a way that the Leading or running of the interacting cylinders (Blanket cylinder / plate cylinder) canceled during channel correspondence the leading or trailing cylinder, for example at the nominal start of pressure returns to the same starting position.

In addition to pressure length compensation, it can be modified accordingly the offset table of the correction device provided according to the invention also various Simulate compressibility or printing properties of blankets. Since that too Duplicate its cause in the area of the pressure zone between plate cylinder and blanket cylinder or in the area between the blanket cylinder and impression cylinder (Printing material) can also have this effect by appropriate modification of a one-off predefined or saved by a suitable choice from a large number Offset tables can be counteracted.

In addition to the printing compensation options by applying the invention are also advantages in assembly / production of the drive system according to the invention to achieve. In particular, a lower quality angle measuring system can be used be what is indicated by the above and in particular the printing speed (Speed) taking correction possibility results. Even the inaccuracies one connected between the cylinder and the drive motor driving it Gear units can be compensated for by the correction device provided according to the invention. Furthermore, complex fine adjustment of the measuring system (angular position encoder) to be dispensed with. Instead, a correction function is made using a comparison measurement the encoder is determined using a high-precision position encoder used during assembly, which brings about a compensation via the intended offset table and the regulation.

Furthermore, the explanation is based on an embodiment of the invention with reference to the drawings. It shows:

Fig. 1
a drive unit for a printing couple cylinder with the correction device provided according to the invention, and
Fig. 2
the correction values plotted as a characteristic curve over one revolution for converting the actual position values read by the angular position encoder.

Fig. 1 shows in principle the components for a single drive of a cylinder 1 in the illustrated printing unit of a sheetfed offset printing press. The cylinder 1 can here around a plate cylinder, a blanket cylinder or an impression cylinder act. The cylinder 1 is directly coupled to a motor 2 and can be driven by it. The cylinder 1 also has an angular position encoder 6 in rotatably coupled to it Form of an absolute angle encoder, which corresponds to the angular position of the cylinder 1 Signals can be removed.

A drive controller 3 designed as an electronic control device stands with a power unit (Converter) 4 for energizing the motor 2 in signal connection. The brushless one DC motor designed motor 2 is with a commutation 5 Formation of commutation signals and correct energization of the motor 2 by the Power section 4 connected. The drive controller 3 are via an indicated signal line Position setpoints LS from a higher-level control device, not shown fed. The actual position values which can be detected via the angular position sensor 6 of the cylinder 1 (Angle signals) LI are a correction device designed as a memory or computer device 7 supplied, by means of which can be removed directly from the position sensor 6 Actual position values LI are converted into modified actual position values LI '. This in the correction device 7 modified actual position values LI 'are supplied to the drive controller 3 and there according to a target-actual comparison for the position control of the cylinder 1 evaluated accordingly. It is essential in the present invention that the Drive controller 3 does not directly compare the target / actual comparison on the basis of those that can be detected by angular position encoder 6 Actual position values LI but the modified actual position values LI 'with that of higher-level controller performs the specified position setpoint LS.

According to the invention, it is provided that, in the correction device 7, modified actual position values LI 'are formed from the actual position values LI directly detectable by the angular position sensor 6 in conjunction with stored correction values ΔL. In particular, it is provided that the modified actual position values LI 'are formed in accordance with the following relationship: LI '= LI + ΔL (LI). The modified actual position values LI 'formed in accordance with the above-mentioned relationship are formed from the actual position values LI which can be obtained directly from the angular position sensor 6 and a correction variable ΔL (LI). The correction variable ΔL (LI) can have a positive or negative sign, so that the actual position value LI currently supplied by the angular position encoder 6 is increased or decreased by a corresponding amount.

Fig. 2 shows in principle in the form of a characteristic curve (which is stored in an offset table) correction values Δ (LI) assigned to individual actual position values LI. On the abscissa of the 2 is in the range between 0 and 360 ° the current and the Angular position encoder 6 removable actual position value LI applied. The characteristic curve according to FIG. 2 thus relates to the actual position value that can be read on the ordinate LI assigned correction value ΔL (LI). The transition from 0 to 360 ° or Transition from 360 ° to 0 ° (beyond one turn) shows a steady transition Characteristic curve ΔL (LI). FIG. 2 also shows that one stored in the offset table Characteristic curve can also be modified. The solid characteristic curve represents one so-called output characteristic curve, indicated by the dashed line is that this can be modified according to predeterminable parameters. For example 2 is a modification of the output characteristic ΔL (LI) by multiplication with a predetermined factor.

Reference list

1
cylinder
2nd
engine
3rd
Drive controller
4th
Power section (converter / field controller)
5
Commutation encoder
6
Angular position encoder
7
Correction device
LS
Position setpoint
LI
Actual position value (angular position encoder 6)
LI '
modified actual position value
ΔL
Correction value offset table (correction device 7)

Claims (6)

  1. Drive for a printing press, particularly an offset sheet printing press, in which one or several cylinders are individually and/or in groups drivable in each case by one motor with a fitted drive controller in combination with signals of an angle position sensor corresponding to preset desired position values, characterised in that between angle position sensor (6) and drive controller (3), a correction device (7) is connected modifying the actual position values (LI) of the angle position sensor (6) into modified actual position values (LI'), and that via the drive controller (3), a positional control of the cylinder (1) takes place in combination with the modified actual position values (LI').
  2. Drive according to Claim 1, characterised in that the correction unit (7) is constructed as a storage unit which contains stored modified actual position values (LI') coordinated to the real actual position values (LI) and which can be fed to the drive controller (3).
  3. Drive according to Claim 1, characterised in that the correction unit (7) is constructed as a computer unit by means of which from the real actual position values (LI), modified actual position values (LI') feedable to the drive controller (3) can be calculated.
  4. Drive according to Claim 1, 2 or 3, characterised in that via an input device, the modified actual position values which can be calculated or which are stored in the correction device (7) can be changed and thereafter can be fed in dependence on the respective actual position values (LI) to the drive control (3).
  5. Drive according to Claim 4, characterised in that the change of the modified actual position values (LI') preset by the correction unit (7) results in dependence on the respective print conditions.
  6. Drive according to one of the preceding Claims, characterised in that there can be fed to the correction unit (7) as well as the actual position values (LI) of the angle position sensor (6) additionally a quantity corresponding to the rotational speed of the drive system, and that the modification of the actual position values (LI) takes place in dependence on this rotational speed value.
EP19970106049 1996-06-11 1997-04-12 Drive for a printing machine Expired - Lifetime EP0812682B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19623223 1996-06-11
DE1996123223 DE19623223C2 (en) 1996-06-11 1996-06-11 Drive for a printing press

Publications (3)

Publication Number Publication Date
EP0812682A2 EP0812682A2 (en) 1997-12-17
EP0812682A3 EP0812682A3 (en) 1998-06-10
EP0812682B1 true EP0812682B1 (en) 1999-09-29

Family

ID=7796603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970106049 Expired - Lifetime EP0812682B1 (en) 1996-06-11 1997-04-12 Drive for a printing machine

Country Status (5)

Country Link
US (1) US5924362A (en)
EP (1) EP0812682B1 (en)
JP (1) JPH1067098A (en)
AT (1) AT185108T (en)
DE (1) DE19623223C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1759844B2 (en) 2005-09-02 2019-04-24 Bosch Rexroth Aktiengesellschaft Process for printing correcting

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DE19820160A1 (en) * 1997-10-07 1999-04-08 Heidelberger Druckmasch Ag Rotary angle measuring device for printers
DE19754323A1 (en) * 1997-12-08 1999-06-10 Fischer & Krecke Gmbh & Co Printing press
DE19803558A1 (en) * 1998-01-30 1999-08-12 Koenig & Bauer Ag Method for determining an angular position of a displaceable cylinder of a printing press
DE19947230C2 (en) * 1999-10-01 2001-07-26 Koenig & Bauer Ag Method for positioning plate cylinders of an offset rotary sheet printing machine
US6199481B1 (en) * 1999-11-04 2001-03-13 Shinohara Machinery Co., Ltd. Power feeder apparatus for rotary shaft in printing press
EP1116582A1 (en) * 2000-01-13 2001-07-18 FISCHER & KRECKE GMBH & CO. Method and device for driving a printing cylinder
DE10155033B4 (en) * 2000-11-30 2014-09-18 Heidelberger Druckmaschinen Ag Device for synchronization of transfers of sheet material
US6705222B2 (en) * 2001-03-09 2004-03-16 Ward, Inc. Dual registration control system
DE10125609A1 (en) 2001-05-25 2002-12-05 Siemens Ag Control procedure for the operation of individually driven rotating machine elements
DE10132807C5 (en) 2001-07-06 2009-01-08 Siemens Ag Control method for operating coupled drive axes with superimposed motion components
JP4451049B2 (en) * 2001-07-26 2010-04-14 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフトHeidelberger Druckmaschinen AG Multi-motor drive device and method for driving a sheet-fed printing press
DE10254118B4 (en) * 2001-12-12 2017-01-19 Heidelberger Druckmaschinen Ag Method for driving a printing machine
DE10217707A1 (en) * 2002-04-17 2003-11-06 Heidelberger Druckmasch Ag Compensation for cylinder vibrations in printing material processing machines
DE10243454C5 (en) * 2002-09-19 2009-10-08 Koenig & Bauer Aktiengesellschaft Drive device of a processing machine
DE10317570B3 (en) * 2003-04-16 2004-09-16 Koenig & Bauer Ag Print machine drive device for controlling the various units of the machine, has a virtual control axis and a switch with which the changing angular position of the control axis is converted to an output control impulse sequence
DE102004051633A1 (en) * 2004-10-23 2006-05-18 Man Roland Druckmaschinen Ag Method for cutting register control in a web-fed rotary printing press
DE102005042563A1 (en) * 2005-09-08 2007-03-15 Man Roland Druckmaschinen Ag Printing machine e.g. sheet fed printing machine, has several printing groups and lacquer unit whereby optimized parameter sets of drive controller are set depending on speed of printing machine for appropriate regulation of driving motor
DE102005042932A1 (en) 2005-09-09 2007-03-22 Man Roland Druckmaschinen Ag Printing machine, in particular web-fed printing press
DE102005048472A1 (en) 2005-10-07 2007-04-12 Bosch Rexroth Ag Rotary printing machine and method of operating a rotary printing machine
US8620473B2 (en) 2007-06-13 2013-12-31 Intuitive Surgical Operations, Inc. Medical robotic system with coupled control modes
DE102006054944A1 (en) * 2006-11-22 2008-05-29 Koenig & Bauer Aktiengesellschaft Printing unit disturbing moment compensation method for sheet rotary printing press, involves measuring cylinder angle position by measuring system, and taking place current feed of drive such that cylinder is subjected with moments
DE102008000184B4 (en) * 2008-01-30 2011-02-24 Koenig & Bauer Aktiengesellschaft Method for reducing or avoiding unwinding errors on rotary printing machines
AT10301U3 (en) 2008-09-01 2009-09-15 Avl List Gmbh Method and regulation for regulating a regular track with a recycling working cycle
DE102008053127B4 (en) * 2008-10-24 2015-04-02 Robert Bosch Gmbh A provisioning apparatus and method for providing a link signal for controlling a plant
DE102010011577A1 (en) * 2009-03-25 2010-10-14 Heidelberger Druckmaschinen Ag Angle-dependent color value correction
DE102015215541A1 (en) 2014-09-18 2016-03-24 Koenig & Bauer Ag Method for adapting at least one printed image and / or at least one cylinder elevator to a change of substrate in a printing machine
DE102015215539A1 (en) 2014-09-18 2016-03-24 Koenig & Bauer Ag Device for adapting at least one cylinder elevator to a change of substrate in a printing machine
DE102015204858A1 (en) 2015-03-18 2016-09-22 Koenig & Bauer Ag Method for operating a printing press and printing machine for this purpose
DE102017208513B4 (en) 2017-05-19 2019-05-02 Koenig & Bauer Ag Method for operating a sheet-processing machine

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Publication number Priority date Publication date Assignee Title
EP1759844B2 (en) 2005-09-02 2019-04-24 Bosch Rexroth Aktiengesellschaft Process for printing correcting

Also Published As

Publication number Publication date
EP0812682A3 (en) 1998-06-10
EP0812682A2 (en) 1997-12-17
DE19623223A1 (en) 1997-12-18
US5924362A (en) 1999-07-20
DE19623223C2 (en) 2001-05-17
AT185108T (en) 1999-10-15
JPH1067098A (en) 1998-03-10

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