EP1156387B1 - Méthode et dispositif d'ajustement de registration - Google Patents

Méthode et dispositif d'ajustement de registration Download PDF

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Publication number
EP1156387B1
EP1156387B1 EP01111316A EP01111316A EP1156387B1 EP 1156387 B1 EP1156387 B1 EP 1156387B1 EP 01111316 A EP01111316 A EP 01111316A EP 01111316 A EP01111316 A EP 01111316A EP 1156387 B1 EP1156387 B1 EP 1156387B1
Authority
EP
European Patent Office
Prior art keywords
color separation
separation images
printing
substrate
computer
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
EP01111316A
Other languages
German (de)
English (en)
Other versions
EP1156387A2 (fr
EP1156387A3 (fr
Inventor
Heiko Hunold
Ralph Petersen
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 EP1156387A2 publication Critical patent/EP1156387A2/fr
Publication of EP1156387A3 publication Critical patent/EP1156387A3/fr
Application granted granted Critical
Publication of EP1156387B1 publication Critical patent/EP1156387B1/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
    • 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
    • G03G2215/00721—Detection of physical properties of sheet position
    • 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 register setting method comprising detecting the entry of a printing substrate into a printing machine and calculating the start of the digital production of partial color images to obtain a registration of the partial color prints on a printing substrate, after which the calculation of the relative positions of the partial color images is performed by making an accurate detection of the front edge of the printing substrate as it enters the printing machine and making it the basis for determining the starts of the partial color images precalculated relative to their relative position.
  • the invention further relates to an apparatus for carrying out the method according to the invention as claimed in claim 3.
  • 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. By overprinting these colors can be achieved all color compositions, 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 devices so that the partial color images meet in register when transferred to a printing substrate. This must be set and readjusted during printing if necessary. Since the partial color images are newly created for each individual print image, a setting or correction is possible after each printing process.
  • the JP 58 050558 A also discloses a method of the type mentioned. From the US-A-3 998 156 In addition, a screen printing machine is known, can be printed in register with the textile webs.
  • the invention is therefore based on the object, a method and an apparatus of the type mentioned in such a way that more time is available for calculating the set values for the register setting
  • the higher computational effort is processed before the entry of a printing substrate in the printing machine and the determined values are kept available in such a way that only one assignment of the leading edge in the printing machine entering printing substrate to the pre-calculated relative positions is required.
  • the assignment takes place by releasing start signals for the generation of the partial color images according to precalculated data.
  • This is associated with a low computational effort, which can be overcome in a short time.
  • a precise and fast assignment of the printing substrate to the calculated values is possible.
  • the invention makes it possible to achieve an exact relative position of the partial color images.
  • a higher print quality can be achieved and the calculation of the register setting is no longer a bottleneck for increasing the printing speed.
  • a calculation of the relative position of the image beginnings of the partial color images takes place according to the invention, the calculation of the relative positions of the partial color images comprising both the image beginnings and the position of defined regions into which the partial color images are subdivided and these defined regions comprise pixel lines of the partial color images or a defined number of Pixel lines are.
  • An embodiment of the invention provides that the positions of the production of the partial color images relative to their transfer points on the printing substrate to achieve a register match as well as with the paths of the printing substrate are coordinated to the transfer points.
  • the second embodiment has the advantage that errors resulting from the time-position assignment, for example from a time-path or a time-angle assignment, are not included in the calculation. As a result, a more precise control or regulation and thus a higher register accuracy and better print quality is achieved.
  • the device has at least one sensor for detecting a component of a partial color image and the computer is designed such that it detects the relative positions of the individual partial color images with one another in order to achieve registration and the relative position of the substrate carrier for positioning the print voting on the latter.
  • Such defined components of a partial color image may be the register marks, but it is also possible to use other defined components, such as boundaries of an image.
  • the device provides sensors for detecting angular positions of the partial color image-transmitting elements and the angular positions of the drive roller of the substrate carrier, wherein the computer is designed such that it with the angular positions of the partial color image transmitting elements with each other to achieve register matching and the angular positions of the drive roller of the substrate carrier tunes the aforementioned angular positions.
  • the sensors mentioned can also be sensors for detecting paths, for example register marks, or they can be sensors which control the travel times of image signals. or substrate-bearing elements.
  • sensors for detecting the paths of the surfaces of the carrier elements so for example the image cylinder may be provided, and it may also be provided sensors for detecting paths of the surfaces of image transfer elements, for example of transfer cylinders.
  • a sensor for detecting the path of the substrate carrier is also possible for the assignment of the printing substrates to the partial color images.
  • sensors are provided as sensors and there is a calibration for the corresponding angular positions instead.
  • Fig. 1 shows a printing machine 1 with a device of the type according to the invention.
  • the printing press 1 are fed to printing substrates 2 by means of a belt 29 and then passed through the machine by means of a substrate carrier 28, the printing substrates 2 being four color printing units 10, 10 ', 10 ", 10"'. happen.
  • the color printing units 10, 10 ', 10 ", 10"' have devices 13, 13 ', 13 ", 13"' for generating digital partial color images 3, 3 ', 3 ", 3”' which are arranged on surfaces of carrier elements 14, 14 ', 14 ", 14"' are generated.
  • These support elements 14, 14 ', 14 ", 14"' are designed as image cylinders.
  • partial color images 3, 3 ', 3 ", 3”' can also be produced on tapes or successively on a single image cylinder.
  • the partial color images 3, 3 ', 3 ". 3"', from their generation until their transmission, travel the paths 8, 8 ', 8 ", 8"', these paths being in the Fig. 1 are entered as thick lines.
  • the sub-color prints 4, 4 ', 4 ", 4"' must be printed exactly on top of each other.
  • a sensor 23 which controls the entry of the printing substrates 2 detected in the printing machine 1. This sensor 23 registers the arrival of the leading edge 5 of a printing substrate 2 and gives a signal 17 to the computer 12.
  • the illustrated embodiment corresponds to a development of the invention, which provides that the computer 12, the positions 8, 8 ', 8 “, 8”' - ie angles or paths of the partial color images 3, 3 ', 3 ", 3"' - in their Associates relative position and then these positions 8, 8 ', 8 “, 8”' with the positions 11, 11 ', 11 ", 11”' of the printing substrate 2 tuned such that the image beginnings 6 in the right place of the printing substrates 2 to come lie.
  • Fig. 2 shows a color printing unit 10 of the printing machine 1 in a perspective view.
  • this color printing unit 10 it is shown how the partial color image 3 is subdivided into defined regions 7, 7 ', 7 ",..., 7 n , for each of these defined regions 7, 7', 7", n calculate positions 8 and 11. Accordingly, these positions 8, 8 ', 8 “, 8”' and the positions 11, 11 ', 11 ", 11”' - when they are reached by the Printing substrate 2 must start the production of the partial color images 3, 3 ', 3 ", 3"' - calculated for all color printing units 10, 10 ', 10 ", 10"' in order to produce them for all defined regions 7, 7 ', 7 " ..., 7 n to be consistent. However, such computational effort can usually after detection of the occurrence of a print substrate 2 no longer perform in the press on the sensor 23.
  • This sensor 15 detects the leading edge 5 of a printing substrate 2 and outputs a signal 16 to the computer 12, so that this begins with the calculation of the positions 8, 8 ', 8 ", 8"' and these assigns each other register.
  • the computer 12 it is also possible for the computer 12 to already calculate the positions 11, 11 ', 11 ", 11”' of the printing substrate 2 on the substrate carrier 28 and to correspondingly position these positions 11, 11 ', 11 ", 11”' Assigns positions 8, 8 ', 8 ", 8"', so that all image beginnings 6 of the partial color prints 4, 4 ', 4 ", 4"' come to lie in the right places of the printing substrate 2. Furthermore, the computer 12 also carries out these calculations for the defined regions 7, 7 ', 7 ",..., 7 n of the partial color images 3, 3', 3", 3 "'.
  • 8 ", 8"', 11, 11', 11 ", 11”' can also be the corresponding positions 8, 8', 8 “, 8”', 11, 11', 11 ", 11”'of the surfaces of the partial color image transmitting Elements 14, 14 ', 14'', 14 "', 26, 26 ', 26", 26 “' matched and this with the paths 11, 11 ', 11'',11”' of the surface of the substrate carrier 28 tuned become.
  • the computer 12 after receiving the signal 17, only needs to calculate these now precisely detected leading edge 5 of the printing substrate 2 assign.
  • control data 27, 27 ', 27 “, 27”' for the register-containing assignment of the partial color images 3, 3 ', 3 “, 3”' and the assignment the same are provided to the printing substrate 2.
  • 27 ', 27 ", 27”' devices 18, 18 ', 18 “, 18”' are provided, which determine the release of the time after the time or, preferably, the position of the printing substrate 2 on the substrate carrier 28.
  • the data 27, 27 ', 27 “, 27”' are then used on the basis of start signals 19, 19 ', 19 ", 19”' for the image beginnings 6 and for the defined regions 7, 7 ', 7 ", ... , 7 n and the partial color images 3, 3 ', 3 ", 3”' are created.
  • the sensors 24, 24 ', 24 ", 24”' for detecting the positions of the image cylinder 14, 14 ', 14 “, 14”' are provided, which the corresponding data 20, 20 ', 20 “, 20'” also to the computer 12 give.
  • sensors 25, 25 ', 25' ', 25 “' are provided, which also transmit their data to the computer 12, these data lines were not shown for clarity.
  • the sensors 30, 24, 24 ', 24 ", 24"', 25, 25 ', 25 “, 25'” may, in addition to angular position sensors, also be sensors which detect path markings on the surfaces.
  • Positions can also be detected by means of register marks, for this purpose a sensor 22 is provided which detects the positions of printed register marks. It may be a sensor 22 ', which detects the position assignments of the register marks directly and outputs this data to the computer 12. Such detection of register marks can also be designed as a path or time recording. It can also serve to control the aforementioned calculations or to serve these by a To correct regulation. The correction can be made for each creation of a partial color image 3, 3 ', 3 ", 3"'.
  • the illustration shows by the arrow 31, the transport direction of the printing substrates 2, the impression cylinder 32 and the arrows without reference numerals in the cylinders, which indicate the direction of rotation thereof.
  • the invention can of course be realized not only on a printing press according to the illustrated example, it is also possible to proceed accordingly with differently designed printing presses.
  • Printing machines are conceivable in which the partial color images 3, 3 ', 3 ", 3"' are fed to an intermediate carrier, which transfers them together to a printing substrate 2. It is also possible that the support elements 14, 14 ', 14 ", 14"' for the part color images 3, 3 ', 3 ", 3"' as a band or otherwise configured. Variations of configurations of printing machines are conceivable, according to the appended claims.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Electrophotography (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Communication Control (AREA)

Claims (5)

  1. Procédé de réglage de registre avec un enregistrement de l'entrée d'un substrat d'impression (2) dans une imprimante (1) et un calcul du début de la production numérique d'images partielles en couleur (3, 3', 3", 3"') pour l'obtention d'une position à repérage des produits imprimés partiels en couleur (4, 4', 4", 4"') sur un substrat d'impression (2), cet enregistrement étant suivi par le calcul des positions relatives des images partielles en couleur (3, 3', 3", 3"') et l'entrée dans l'imprimante (1) étant accompagnée de l'enregistrement précis du bord avant (5) du substrat d'impression (2), cet enregistrement étant utilisé comme base pour déterminer les débuts de la production des images partielles en couleur (3, 3', 3", 3"') calculée au préalable par rapport à leur position relative, caractérisé en ce qu'un enregistrement du substrat d'impression (2) s'effectue avant son entrée dans l'imprimante (1), en ce que le calcul des positions relatives des images partielles en couleur (4, 4', 4", 4"') comprend les débuts d'image (6), d'une part, et la position des plages définies (7, 7', 7", ...,7n), d'autre part, dans lesquelles les images partielles en couleur (3, 3', 3", 3"') sont réparties, en ce que les plages (7, 7', 7", ... 7n) sont des lignes de points d'image des images partielles en couleur (3, 3', 3", 3"') et en ce que les plages (7, 7', 7" ... 7n) sont, à chaque fois, un nombre prédéterminé de lignes de points d'image.
  2. Procédé selon la revendication 1, caractérisé en ce que les positions (8, 8', 8", 8"') de production des images partielles en couleur (3, 3', 3", 3"') sont coordonnées par rapport à leurs points de transfert (9, 9', 9", 9"') au substrat d'impression (2) pour obtenir une concordance de registre, ainsi qu'avec les distances parcourues (11, 11', 11", 11"') par le substrat d'impression (2) jusqu'aux points de transfert (9, 9', 9", 9"').
  3. Dispositif de réglage de registre pour appliquer le procédé selon l'une quelconque des revendications 1 ou 2 sur une imprimante (1) comprenant plusieurs groupes d'impression en couleur (10, 10', 10", 10"') pour produire plusieurs images partielles en couleur (4, 4', 4", 4"'), un capteur (23) étant prévu de sorte qu'il capte l'entrée du substrat d'impression (2) dans l'imprimante (1) et un calculateur étant configuré de sorte qu'il calcule le début de la production des images partielles en couleur (3, 3', 3", 3"') par des dispositifs (13, 13', 13", 13"') de génération numérique de ces dernières sur un élément support (14, 14', 14", 14"') et provoque cette production, caractérisé en ce qu'un capteur (15) disposé en amont de l'imprimante (1) est configuré de sorte que le substrat d'impression (2) soit détecté avant son entrée dans l'imprimante (1) et que le capteur émette un signal (16) transmis au calculateur (12), suite à quoi ce dernier calcule les positions relatives des images partielles en couleur (3, 3', 3", 3"') et en ce que le capteur (23) disposé dans l'imprimante (1) transmet un signal (17) à des dispositifs (18, 18', 18", 18"') de définition de la libération des signaux de début (19, 19', 19", 19"') de la production d'images partielles en couleur (3, 3', 3", 3"') en fonction de leurs positions relatives et en ce que le calculateur (12) est conçu et chargé de données (20, 20', 20", 20"', 21) pour la position relative des éléments supports (14, 14', 14", 14"') et d'un support de substrat (28) de sorte qu'il effectue un calcul comprenant les débuts d'image (6) et la position des plages définies (7, 7', 7",..., 7n) par rapport aux positions relatives des images partielles en couleur (4, 4', 4", 4"'), plages dans lesquelles sont réparties les images partielles en couleur et qui commandent, sur cette base, les dispositifs (13, 13', 13", 13"') de production des images partielles en couleurs.
  4. Dispositif selon la revendication 3, caractérisé en ce que ce dispositif comprend au moins un capteur (22) d'enregistrement d'un composant préalablement défini d'une image partielle en couleur (3, 3', 3", 3"') et en ce que le calculateur (12) est conçu de sorte qu'il coordonne les positions relatives des différentes images partielles en couleur (7, 7', 7", ..., 7n) enregistrées de cette manière entre elles pour obtenir la concordance de registre, ainsi que la position relative du support de substrat (28) par rapport au positionnement de l'impression sur ce dernier.
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que ce dispositif comprend les capteurs (22', 24, 24', 24", 24"', 25, 25', 25", 25"', 30) d'enregistrement de positions angulaires (8, 8', 8", 8"') des éléments transférant des images partielles en couleur (14, 14', 14", 14"', 26, 26', 26", 26"') et de positions angulaires du rouleau d'entraînement (33) du support de substrat (28) et en ce que le calculateur (12) est conçu de sorte qu'il coordonne les positions angulaires (8, 8', 8", 8"') des éléments transférant les images partielles en couleur (14, 14', 14", 14"', 26, 26', 26", 26"') entre elles pour obtenir la concordance de registre, ainsi que les positions angulaires (11, 11', 11", 11"') du rouleau d'entraînement (33) du support de substrat (28) avec les positions angulaires (8, 8', 8", 8"') mentionnées ci-dessus.
EP01111316A 2000-05-17 2001-05-09 Méthode et dispositif d'ajustement de registration Expired - Lifetime EP1156387B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20467400P 2000-05-17 2000-05-17
US204674P 2000-05-17

Publications (3)

Publication Number Publication Date
EP1156387A2 EP1156387A2 (fr) 2001-11-21
EP1156387A3 EP1156387A3 (fr) 2005-03-23
EP1156387B1 true EP1156387B1 (fr) 2008-04-16

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EP01111316A Expired - Lifetime EP1156387B1 (fr) 2000-05-17 2001-05-09 Méthode et dispositif d'ajustement de registration

Country Status (5)

Country Link
US (1) US6532873B2 (fr)
EP (1) EP1156387B1 (fr)
JP (1) JP4713762B2 (fr)
AT (1) ATE392648T1 (fr)
DE (1) DE50113850D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008213366A (ja) * 2007-03-06 2008-09-18 Ryobi Ltd 印刷機におけるカラーバーの色濃度測定方法及び印刷機におけるカラーバーの色濃度測定装置並びに色濃度測定装置を備えた印刷機
US11829084B2 (en) 2021-09-28 2023-11-28 Eastman Kodak Company Registration of white toner in an electrophotographic printer
US11822262B2 (en) 2021-09-28 2023-11-21 Eastman Kodak Company Registration of white toner using sensing system with colored reflector plate

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT351488B (de) * 1972-09-08 1979-07-25 Zimmer Peter Ag Anordnung an einer rotationsschablonendruck- maschine zum bedrucken einer kontinuierlich bewegten, abschnittsweise unterschiedlich struktuierten warenbahn
JPS5850558A (ja) * 1981-09-22 1983-03-25 Canon Inc カラ−画像記録装置
FI861578A0 (fi) * 1986-04-14 1986-04-14 Valtion Teknillinen Foerfarande foer kvalitetskontroll av tryckning.
EP0505580B1 (fr) * 1990-10-12 1996-01-31 Canon Kabushiki Kaisha Appareil de formation d'images
JP3257891B2 (ja) 1993-12-29 2002-02-18 キヤノン株式会社 カラー画像形成装置およびカラー画像形成装置の制御方法
JPH08278680A (ja) * 1995-04-05 1996-10-22 Toshiba Corp 画像形成装置ならびに画像形成装置の制御方法
JPH09236963A (ja) * 1996-02-28 1997-09-09 Ricoh Co Ltd 画像形成装置
JPH10186951A (ja) * 1996-12-26 1998-07-14 Canon Inc 画像形成装置
US5875380A (en) * 1997-02-18 1999-02-23 Ricoh Company, Ltd. Image forming apparatus eliminating influence of fluctuation in speed of a conveying belt to correction of offset in color registration

Also Published As

Publication number Publication date
JP2002023446A (ja) 2002-01-23
EP1156387A2 (fr) 2001-11-21
EP1156387A3 (fr) 2005-03-23
JP4713762B2 (ja) 2011-06-29
DE50113850D1 (de) 2008-05-29
ATE392648T1 (de) 2008-05-15
US6532873B2 (en) 2003-03-18
US20010042480A1 (en) 2001-11-22

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