EP1156383B1 - Méthode d'ajustement de registration dans une imprimante couleur - Google Patents

Méthode d'ajustement de registration dans une imprimante couleur Download PDF

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Publication number
EP1156383B1
EP1156383B1 EP01110798A EP01110798A EP1156383B1 EP 1156383 B1 EP1156383 B1 EP 1156383B1 EP 01110798 A EP01110798 A EP 01110798A EP 01110798 A EP01110798 A EP 01110798A EP 1156383 B1 EP1156383 B1 EP 1156383B1
Authority
EP
European Patent Office
Prior art keywords
printing
register
change
printing substrate
substrates
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
EP01110798A
Other languages
German (de)
English (en)
Other versions
EP1156383A2 (fr
EP1156383A3 (fr
Inventor
Ingo Dreher
Karlheinz Dr. Peter
Patrick Dr. Metzler
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP1156383A2 publication Critical patent/EP1156383A2/fr
Publication of EP1156383A3 publication Critical patent/EP1156383A3/fr
Application granted granted Critical
Publication of EP1156383B1 publication Critical patent/EP1156383B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142—Structure of complete machines
    • G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
    • G03G15/0194—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image primary transfer to the final recording medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/13—Pre-registering
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00738—Detection of physical properties of sheet thickness or rigidity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0103—Plural electrographic recording members
    • G03G2215/0119—Linear arrangement adjacent plural transfer points
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0151—Apparatus for electrophotographic processes for producing multicoloured copies characterised by the technical problem
    • G03G2215/0158—Colour registration
    • G03G2215/0161—Generation of registration marks

Definitions

  • the invention relates to a method for setting the register in a multi-color printing machine having a plurality of devices for digitally generating Operadurdem, wherein supply of printing substrates of a different sort for correcting the register setting, the creation and assembly of the partial color images is controlled.
  • the printing of color representations takes place in that several partial color images are printed one above the other. These are usually the colors yellow, magenta and cyan as well as black. If necessary, special colors are added.
  • the overprinting of these colors can be achieved all color combinations, the quality of the prints depends significantly on the register-based overprinting of the partial color images.
  • the registration of the overprinting is achieved by controlling the image forming means so that the partial color images register in register when transferred to a printing substrate.
  • a method and a device of the type mentioned is from the US Pat. No. 5,689,757 known. There it is taught to take into account the influence of paper roughness on the register when feeding of printing substrates of another variety. For this purpose, the roughness of a paper to be printed, is detected. The influence of paper roughness on the register is then taken into account by register control before the paper is fed to the printing process.
  • the prior art ( US5742867 ) has a multi-color printing machine wherein the speed of the conveyor rollers is adapted for register control. The speed of the rollers is also adjusted depending on the substrate thickness which is measured manually or with a sensor to avoid another register error.
  • the invention is therefore based on the object, a method of the type mentioned in such a way that with a change of the printing substrate, the influence of this change can be counteracted to the register to a high degree before the printing substrate is fed to the printing process.
  • the object is achieved with respect to the method according to the invention in that when changing the printing substrate thickness due to a printing substrate change, the influence of the printing substrate thickness on the register by means of existing influencing variables directly with the implementation of the change is taken into account, according to claim 1.
  • the invention is based on the finding that, in the case of a printing substrate change, the decisive factor influencing the register is the printing substrate thickness. This is due to the fact that the movements of the partial image and substrate-carrying elements are linked together by friction. In this case, the radius which is decisive for the transmission ratio between the printing substrate carrier and a cylinder is changed by a change in the printing substrate thickness. This changing gear ratio affects the register much more than the paper roughness. Above all, there is no other possibility with regard to the influence of the printing substrate thickness than the consideration when creating and assembling the partial color images. On the other hand, the influence of the paper roughness can be counteracted in another way, in particular by counteracting slippage by lower force transmission, the surface condition of the image-bearing cylinder and the nature of the toner or other materials influencing the transmission of force.
  • the influence of the register is substantially detected by a printing substrate change.
  • this influence on the register before feeding another kind of printing substrates to the printing process in the setting of the register, it is possible to prevent the occurrence of a registration error from the outset, so that trial prints on printing substrates such as register marks are prevented Usually not required. Especially for short runs or single copies, this is economically important because machine time and often also printing substrates are saved.
  • proofs are printed on the substrate without supply of Printing substrates for the correction of other influences on the register possible, since the main influence of the printing substrates is taken into account by the detection of their thickness.
  • the measure according to the invention makes it possible to optimize a register setting of a known type so that it does not first "get out of hand" during printed page changes with print substrate changes, and then be corrected again, but the register setting remains within tolerable fluctuations, so that a different sort is used can be further printed by printing substrates without interruption.
  • the invention does not exclude the additional consideration of other influencing variables, such as the paper stiffness, the toner application and also the paper roughness, insofar as these influence the register. It also does not matter in the measure according to the invention whether the printing substrate carrier interacts directly with the image cylinders with the printing substrates for transferring the partial color images or whether image transfer cylinders are interposed therebetween.
  • a development of the method provides that in a register correction as a result of a change in the printing substrate thickness of the retroactive influence of the printing substrate thickness of the previous but still in the printing process pressure side is taken into account on the register of the new, already in the printing process pressure side. It is taken into account for each printing unit, if the gear ratio is still determined by the printing substrates of the previous printing page, while already an imaging of the image cylinder is made with a partial color image of the new printed page. Furthermore, it is taken into account how this change of the printing substrate thicknesses takes place consecutively on one printing unit after the other, that is to say "through the machine". In this way, the registration of the prints is guaranteed even better at a pressure page change.
  • the printing press can continue to print even without any interruption if, between the creation of two partial color images, the print page change takes place in such a way that the new partial color image is already created, while the preceding partial color image of the previous print page was not or not yet fully transferred to the print substrate.
  • the registration is thus ensured to a large extent even in this overlapping area of two printed pages and any mutual influence is compensated.
  • the economic efficiency of the printing press is substantially increased.
  • this is achieved in that the at least one control is designed so that they at a register correction due to a change in the printing substrate thickness the retroactive influence of the printing substrate thickness of the previous, but still in the printing process pressure side on the register of the new, even in the printing process considered pressure side.
  • the consideration of the influencing variables of the printing substrate thicknesses can be done on the basis of stored data.
  • the detection of a printing substrate thickness change by the change of the kind of printing substrates may be due to a manual input or by a measurement of the thicknesses of the printing substrates before being fed to the printing process.
  • the influencing variables themselves can be entered or it is possible for data stored by the input to be activated for the register setting. It is also possible that the consideration of the printing substrate thicknesses takes place on the basis of a stored file of the printed pages.
  • the influencing variables can be stored as stored data, which are assigned to different printing substrate thicknesses or different types of paper.
  • the device it may be provided that it is equipped with at least one memory containing stored empirical values of influencing variables of different printing substrate thicknesses, wherein the at least one control on the basis of these empirical values controls the production and the assembly of the partial color images.
  • the device it is also possible to equip the device with an input device via which the influencing variables of different print substrate thicknesses to be considered can be activated manually.
  • the device is equipped with at least one memory which is stored Contains empirical values of influencing variables of different print substrate thicknesses, wherein the at least one control with the aid of these data controls the creation and assembly of the partial color images.
  • the device may have a device for measuring print substrate thicknesses and the consideration of the latter by the device may be activated. It may also be a printing press control and a memory to be provided with files of printed pages, taking into account the influence of different sizes Drucksubstratdicken due to these files. In this case, it is expedient if the files of the printed pages are linked to stored data of different types of printing substrates.
  • the invention has the purpose of serving to correct a proposed register control.
  • the latter can be designed such that it is based on the detection of register marks, which are printed by the individual printing units.
  • the invention provides that this correction takes place before a Druckfel- and printing substrate change can affect the register marks.
  • the at least one controller is designed such that it regulates the register by means of register marks which are printed by the individual printing units and a register sensor, and takes into account the factors influencing the printing substrate thicknesses as correction factors, wherein the correction takes place before a print substrate and print page change can have influence on the register.
  • the invention can also be used to correct a register control, which is based on the detection of the positions of the partial color image and substrate-carrying elements.
  • the at least one controller is designed such that it regulates the register by means of a detection of the positions of the partial color image and substrate-carrying elements by position detection elements and takes into account the influencing factors of the printing substrate thicknesses as correction factors.
  • the position detection elements may, for example, be rotary encoders. Such corrections are made before changes can affect the register marks.
  • Fig. 1 it is shown how a change in the printing substrate thickness 17 at a change of the printed pages 5, 5 'has influence on the register.
  • a printing unit 8 of a multi-color printing machine 1 In this case, multi-color presses 1 more printing units 8, 8 ', ..., which must be considered here.
  • the printing unit 8 has a device 2 for the digital production of partial color images 3 on an image cylinder 9.
  • the partial color image 3 is brought by a transfer 30 from the image cylinder 9 to an image transfer cylinder 10.
  • the partial color image 3 comes to a printing substrate 16.
  • the printing substrates 16 are transported by a printing substrate substrate 11, wherein the printing substrates 16 successively all printing units 8, 8 ', ... pass.
  • the drive is effected via a drive roller 23 of the printing substrate carrier 11.
  • the print substrate carrier 11 in turn drives the image transfer cylinders 10, 10 ', ... and these drive the image cylinders 9, 9', ....
  • the print substrate carrier 11 could directly drive the image cylinder 9, 9 ', ....
  • the arrows 22 show the directions of rotation of the cylinders 9, 9 ', ...; 10, 10 ', ... and the arrow 29, the transport direction of the printing substrates 5 and thus the direction of movement of the printing substrate substrate eleventh
  • the printing substrate support 11 is in frictional communication with the printing substrates 16 with the image transfer cylinders 10, 10 ', ..., and they are in communication with the image cylinders 9, 9', ... since, for example, the carriage 11 drives the image transfer cylinder 11 at the location of the transmission 31 a cam 24, which affects the speed of the image transfer cylinder 10. If, for example, the paper thickness 17 is changed in the direction of a thicker paper, the effective radius for the drive of the image transfer cylinder 10 increases since the paper thickness 17 is included therein. Thus, the effective circumference of the image transfer cylinder 10 becomes larger and thereby the image transfer cylinder 10 slower relative to the drive roller 23. However, this problem is independent of whether the drive on the drive roller 23 or at another point is initiated, since the surfaces of the partial image and substrate-carrying elements 9, 9 ', ...; 10, 10 ', ...; 11 in any case roll on each other.
  • a development of the invention provides that the at least one controller 12, 12 ', ...; 15 is formed such that it takes into account in a register correction due to a change in the printing substrate thickness 17 the retroactive influence 4 of the printing substrate thickness 17 of the previous, but still in the printing process pressure side 5 on the register of the new already in the printing process pressure side 5 '.
  • Fig. 2 shows an embodiment of the invention, wherein a multi-color printing machine 1 with two printing units 8, 8 'is shown. Again, this is a simplification, usually four or more printing units 8, 8 ', ... are present. These must be thought out.
  • the multicolor printing machine 1 has devices 2, 2 ',... For the digital production of partial color images 3, 3',... On image cylinders 9, 9 ',.
  • Each printing unit 8, 8 ', ... has an image cylinder 9, 9', ... and an image transfer cylinder 10, 10 ', ..., the latter the partial color images 3, 3', ... on the printing substrates 16 transfer. These are transported in the direction of the arrow 29 by a printing substrate carrier 11 through the printing machine 1.
  • the partial color images 3, 3 ', ... are generated by the devices 2, 2',... In such a way that they are transferred in register to the printing substrates 16, controls 12, 12 ', Control devices 2, 2 ', ... such that image beginnings, lines or areas of the partial color images 3, 3', ... are matched to one another.
  • the controls 12, 12 ', ... can each be associated with a printing unit 8, 8',... Or it is possible that their task is performed by a printing press controller 15 for the entire multi-color printing machine 1.
  • Such controls 12, 12 ', ...; 15 may be configured so that each printing unit 8, 8 ', ... a register mark 7, 7', ... prints and these register marks 7, 7 ', ... are detected by a register sensor 18.
  • the evaluation of the position of the register marks 7, 7 ', ... gives the assignment of the partial color images 3, 3', ... and it can in case of deviations such a correction is made that the partial color images 3, 3 ', ... are transferred in register to the printing substrates 16.
  • the image cylinder 9, 9 ', ... and optionally also the image transfer cylinder 10, 10', ... with position detection elements 19, z. B. are equipped with rotary encoders.
  • Another rotary encoder 19 is provided on the drive roller 23 of the printing substrate carrier 11.
  • the invention provides that the at least one controller 12, 12 ', ...; 15 is designed so that it takes into account with the aid of existing influencing variables 4, 4 ', ... of printing substrate thicknesses 17 their influence on the register directly with a printed page change 5, 5'.
  • One possibility of taking account of influencing variables 4, 4 ',... Of different printing substrate thicknesses 17 is that data from printed pages 5, 5' are input at an input device 14, which are transmitted via a connection 26 from the input device 14 to the controllers 12, 12 ', ... be relayed, with the controls 12, 12 ', ... based on these data of the printed pages 5, 5', ... stored empirical values 6, 6 ', ... for different print substrate thicknesses 17 from memories 13, 13', ... retrieve and thereby the influencing variables 4, 4 ', ... of the same, which are taken into account by the controllers 12, 12', ... without time delay.
  • the devices 2, 2 ', ... are able to make the digital generation of partial color images 3, 3', ...
  • An expedient embodiment provides that a device 20 for measuring print substrate thicknesses 17 is provided, which measures the thicknesses 17 of the multicolor printing machine 1, for example by a conveyor belt 25 fed printing substrates 16, at least when a pressure side change 5, 5 'takes place. On the basis of this measurement, the influencing variables 4, 4 ',... Can be called up according to the measured printing substrate thickness 17 or the stored data 6, 6',... Can be selected accordingly.
  • the partial color image 3 of the new printed page 5 ' is already printed by the printing unit 8, while the printing unit 8' is still the partial color image 3 '. the previous printed page 5 prints.
  • the printing substrate thickness 17 of one printing page 5 for image formation of the other printing page 5 'must be taken into account.
  • a sensor 22 for detecting the position of printing substrates 16 must be disposed at the beginning of the printing substrate carrier 11, which is assigned to the controllers 12, 12', in which position a printing substrate 16 is located on the printing substrate substrate 11.
  • Fig. 2 The list in the embodiment of Fig. 2 is not exhaustive and not all alternatives shown must be provided in the machine.
  • the influencing variables 4, 4 ',... Are input directly to the input device 14 during a printing substrate change or that the influencing variables 4, 4',... Are taken from a memory 21 by the printing machine control 15. This can be activated automatically or via an input on the input device 14.
  • Another possibility, which is also possible separately, is the measurement of print substrate thicknesses 17 by means of the described device 20 in order to retrieve stored influencing variables 4, 4 ',... Or data 6, 6',.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Color, Gradation (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Paper Feeding For Electrophotography (AREA)

Claims (3)

  1. Procédé de réglage du registre d'une imprimante multicolore (1) avec plusieurs dispositifs (2, 2', ...) de génération numérique d'images de couleur partielles (3, 3', ...), la création et l'assemblage des images de couleur partielles (3, 3', ...) étant commandés, lors de l'alimentation de la machine en substrats (16) d'impression d'un autre type, par la correction immédiate du réglage du registre, en cas de changement de l'épaisseur (17) du substrat suite à un changement de substrat sous l'influence de l'épaisseur (17) du substrat sur le registre en fonction des grandeurs d'influence (4, 4', ...) disponibles des différentes épaisseurs de substrat en vue de cette modification de l'épaisseur (17) du substrat d'impression,
    caractérisé en ce que
    l'influence (4) rétroactive de l'épaisseur (17) du substrat d'impression de la feuille (5) précédente mais toujours en cours d'impression sur le registre de la nouvelle feuille (5') déjà en cours d'impression est prise en compte lors de la correction de registre suite à la modification de l'épaisseur (17) du substrat d'impression et qu'il est utilisé pour corriger un réglage de registre fondé sur l'enregistrement de repères (7, 7', ...) de registre imprimés par les différents dispositifs d'impression (8, 8', ...), cette correction s'effectuant avant qu'une modification des feuilles et/ou du substrat d'impression ne puisse avoir une influence sur les repères (7, 7', ...) de registre en appliquant ces repères (7, 7', ...) de registre sur un support de substrat d'impression.
  2. Procédé selon la revendication 1, caractérisé en ce que les épaisseurs (17) d'un nouveau type de substrat (16) d'impression sont mesurées avant d'amener ces substrats au processus d'impression.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que les grandeurs d'influence (4, 4', ...) pour les différentes épaisseurs (17) de substrat d'impression sont disponibles par la mémorisation de données (6, 6', ...) de différents types de substrat d'impression.
EP01110798A 2000-05-17 2001-05-04 Méthode d'ajustement de registration dans une imprimante couleur Expired - Lifetime EP1156383B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20489200P 2000-05-17 2000-05-17
US204892P 2000-05-17

Publications (3)

Publication Number Publication Date
EP1156383A2 EP1156383A2 (fr) 2001-11-21
EP1156383A3 EP1156383A3 (fr) 2006-03-22
EP1156383B1 true EP1156383B1 (fr) 2007-11-07

Family

ID=22759911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01110798A Expired - Lifetime EP1156383B1 (fr) 2000-05-17 2001-05-04 Méthode d'ajustement de registration dans une imprimante couleur

Country Status (5)

Country Link
US (1) US20010055495A1 (fr)
EP (1) EP1156383B1 (fr)
JP (1) JP4938180B2 (fr)
AT (1) ATE377780T1 (fr)
DE (1) DE50113216D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4421286B2 (ja) * 2003-12-22 2010-02-24 株式会社沖データ 画像形成装置及び画像形成システム
CN103381704A (zh) * 2012-05-02 2013-11-06 小森公司 用于印刷机的配准方法和设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5850558A (ja) * 1981-09-22 1983-03-25 Canon Inc カラ−画像記録装置
JPS59137970A (ja) * 1983-01-27 1984-08-08 Canon Inc カラ−画像形成装置の色ずれ防止機構
JP2700460B2 (ja) * 1987-12-17 1998-01-21 大日本印刷株式会社 見当プリセット装置
JPH05162291A (ja) * 1991-12-17 1993-06-29 Taiyo Ltd 印刷機における用紙のテンション調整方法及び装置
JP3275434B2 (ja) * 1993-03-29 2002-04-15 富士ゼロックス株式会社 カラーレジストレーション誤差補正装置
JPH07283912A (ja) * 1994-04-11 1995-10-27 Fuji Photo Film Co Ltd 搬送ドラムの設定方法および搬送装置
JPH09274418A (ja) * 1996-04-05 1997-10-21 Minolta Co Ltd 画像形成装置
JPH10153891A (ja) * 1996-11-25 1998-06-09 Fuji Xerox Co Ltd 画像形成装置

Also Published As

Publication number Publication date
JP2002040733A (ja) 2002-02-06
EP1156383A2 (fr) 2001-11-21
DE50113216D1 (de) 2007-12-20
ATE377780T1 (de) 2007-11-15
US20010055495A1 (en) 2001-12-27
EP1156383A3 (fr) 2006-03-22
JP4938180B2 (ja) 2012-05-23

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