EP1156382A2 - Méthode et appareil pour l'ajustement de registre dans une imprimante couleur - Google Patents

Méthode et appareil pour l'ajustement de registre dans une imprimante couleur Download PDF

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Publication number
EP1156382A2
EP1156382A2 EP01109091A EP01109091A EP1156382A2 EP 1156382 A2 EP1156382 A2 EP 1156382A2 EP 01109091 A EP01109091 A EP 01109091A EP 01109091 A EP01109091 A EP 01109091A EP 1156382 A2 EP1156382 A2 EP 1156382A2
Authority
EP
European Patent Office
Prior art keywords
register
account
influencing variables
taken
printing
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
EP01109091A
Other languages
German (de)
English (en)
Other versions
EP1156382A3 (fr
EP1156382B1 (fr
Inventor
Ingo Dreher
Heiko Hunold
Patrick Dr. Metzler
Karlheinz Dr. Pater
Christopher Liston
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
NexPress Solutions LLC
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, NexPress Solutions LLC filed Critical Eastman Kodak Co
Publication of EP1156382A2 publication Critical patent/EP1156382A2/fr
Publication of EP1156382A3 publication Critical patent/EP1156382A3/fr
Application granted granted Critical
Publication of EP1156382B1 publication Critical patent/EP1156382B1/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
    • G03G2215/00738—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
    • 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 press with several devices for the digital generation of partial color images, whereby the creation and assembly of the Partial color images is controlled so that register-based prints are achieved, wherein Influence factors on the print page that influence the register before entry a change in the creation and merging of the partial color images be taken into account.
  • the invention further relates to a device for carrying out the method a multi-color printing machine with several devices for digital generation of partial color images, with at least one controller for achieving register-based Print a register setting that creates and merges of the part-color images controlled and print-related influencing factors that Have an influence on the register before a change occurs in the control the creation and merging of the partial color images are taken into account.
  • this teaching assumes that a printed page has run out of the machine before a printed page is being processed, the other influencing factors, such as a has a different toner profile or a different printing substrate. Otherwise There is a risk of register errors in the transition phase from one printed page to another. This stems from the fact that there are still print substrates from the previous print page in the machine while one or more image cylinders with the partial color images of the new print page are illustrated or that the printing units have different print pages print if, for example, only one copy of each print page is printed shall be. In the latter case, each partial color image is only created once.
  • the invention is therefore based on the object of a method and a device of the type mentioned in such a way that no interruption of the Printing process between two different printed pages is required, but can be printed on immediately without any loss of quality.
  • the object is achieved in that a register correction as a result of a change in influencing variables of the print page retroactive influence of the influencing factors of the previous printed page is taken into account becomes.
  • the object is achieved in that the at least one controller is designed such that it is in a register correction as a result of a change in influencing variables caused by the printed page, the retroactive influence the influencing factors of the previous printed page are taken into account.
  • the advantage of the invention is that the print quality is seamless Continue printing with a sequence of different printed pages with changes to the Print substrate, the toner profile or other factors influencing the print page is guaranteed.
  • the influencing factors caused by the print job, the influence on the Registers are made at such an early stage - including their interaction in the changeover area from one order to another - takes into account that through it no more register error occurs.
  • a printing press with the invention Design can continue to print despite such a change, since the Influence of changes on the register without interrupting the pressure between the Creation of two part color images can also be compensated if already the new partial color image is created and the previous partial color image of the previous one Print page that differs from the following one, not yet or not yet completely the print substrate has been transferred.
  • the printing machine is therefore suitable for prints in which each print page differs from the image content and / or print substrate differentiates others. There are no interruptions in settings or waste prints and the prints can be made extremely economically with high quality become.
  • print-related factors that influence the register various.
  • One of them is the nature of the paper. It affects the Paper thickness of the curve position on a cylinder and thus the speed of the Cylinder, if this is driven, for example, by the substrate for printing substrates becomes.
  • a cylinder can be an image cylinder or an image transfer cylinder act if such between the image cylinders and the carrier for printing substrates are inserted.
  • the paper texture also has Effect on the contact pressure and the coefficient of friction, which in turn affect the register.
  • the toner profile Another influencing variable is the toner profile, since this also affects the elastic coating of the Image transfer cylinder can deform elastically, which affects the gear ratio Has. Furthermore, the coefficient of friction is influenced by what also affects the transmissions.
  • the influence of the toner profile is there all important if image and substrate-bearing elements are a drive train form, as is the case with most digital multicolor printing presses Case is. This influence is particularly strong in the case of a power transmission between Image cylinder and image transfer cylinder.
  • the influence of the toner profile on the is also a transmission ratio in the case of a power transmission between the substrate carrier and image transfer cylinder or between substrate carrier and image cylinder, so at Machines that do not have image transfer cylinders. Even at these power transmission points the toner profile changes the effective radius and the coefficient of friction.
  • Another expedient embodiment of the method provides that the consideration the influencing variables are based on a stored file of printed pages.
  • a printing press control is then provided for the device, which is stored Contains files from printed pages and taking into account the influencing factors based on these files.
  • the influencing factors are taken into account by the same is recorded automatically.
  • a Device for automatic detection of influencing variables provided.
  • An example for such an automatic detection is the detection of paper thicknesses and the Consideration of empirical values that are assigned to these paper thicknesses. It is also possible for toner profiles to be measured, for example by means of a densitometer, or otherwise detected and these toner profiles assigned empirical values are taken into account.
  • the device for recording influencing variables for the Detection of toner profiles is formed from the digital image files and the at least one memory contains empirical values assigned to the toner profiles.
  • the device is then at least one Memory provided with empirical values for different types of paper and / or loaded with empirical values for different toner profiles.
  • the use of the measure according to the invention for correction is particularly expedient a register regulation.
  • the method for correcting a Register regulation serves, which is based on the registration of register marks, which of the individual printing units are printed, with the basic setting of the register by means of the registration marks and the changes of substrate and toner done by the correction before changes on the print page affect the Can have register marks.
  • at least one controller is designed such that it does the aforementioned method executes.
  • the procedure for correcting a register regulation serves the purpose of capturing the positions of the part-color image and substrate bearing Elements based.
  • the at least one controller designed such that it registers by means of a detection the positions of the part-color image and substrate-carrying elements by position detection elements regulates and takes the influencing factors into account as correction factors.
  • position detection elements can be used, for example, as rotation angle transmitters be trained.
  • a print unit 9 of a multicolor printing press 1 is shown.
  • multicolor printing presses 1 have several printing units 9 , 9 ', ..., which must be considered here
  • the printing unit 9 has a device 2 for digitally generating partial color images 3 on an image cylinder 10.
  • the partial color image 3 is transferred 30 from the image cylinder 10 to an image transfer cylinder 11
  • the partial color image 3 is transferred to a printing substrate 5 by a further transfer 31.
  • the printing substrates 5 are transported through a printing substrate carrier 12, with the printing substrates 5 passing through all printing units 9, 9 ',.
  • the drive takes place via a drive roller 28 of the print substrate carrier 12.
  • the print substrate carrier 12 in turn drives the Image transfer cylinders 11, 11 ', ... and these drive the image cylinders 10, 10', ....
  • the printing substrate support 12 could directly the image cylinder 10, 10 ', ... drive. This is the case with machines that do not have an image transfer cylinder 11, 11 ', ... have.
  • the arrows 29 show the directions of rotation of the Cylinder 10, 10 ', ... and 11, 11', ... and the arrow 23 the transport direction of the Print substrates 5.
  • the print page is currently being changed.
  • the image cylinder 10 is already with the partial color image 3 of the new print page 34 illustrated and possibly already a transfer 30 from the image cylinder 10 on the image transfer cylinder 11 instead.
  • the type of paper, in particular the paper thickness 27, can change.
  • the carrier 12 with the printing substrates 5 drives the image transfer cylinder 11,
  • a curve 32 forms, which represents the speed of the image transfer cylinder 11 influenced.
  • the paper thickness 27 edged in the direction of a thicker paper so the effective increases Radius for the drive of the image transfer cylinder 11, since in this the paper thickness 27 is included.
  • the effective scope of the image transfer cylinder 11 is thus larger and thereby the image transfer cylinder 11 relative to the drive roller 28 slower.
  • a change in the coefficient of friction also has an influence on the register between a printing substrate 5 and the image transfer cylinder 11 and the Coefficient of friction between the image transfer cylinder 11 and the image cylinder 10.
  • the paper roughness and goes in the coefficient of friction the toner image.
  • the toner image is decisive for the changeability of the coefficient of friction between the image cylinder 10 and the image transfer cylinder 11.
  • a toner application leads to the elastic The surface of the image transfer cylinder 11 is elastically deformed, which in turn influences the transmission ratio between image transfer cylinder 11 and image cylinder 10 Has. Also changes between the image transfer cylinder 11 and the printing substrate 5 the rolling when a toner image is transferred.
  • the aim of the invention is that the registration of the prints in the area the transition from one print page 33 to the next print page 34 is also guaranteed is when these are printed one after the other without interruption.
  • Fig. 2 shows an embodiment of the invention. Several alternatives are shown, which can be provided in combination, but which are also possible individually.
  • the illustrated multi-color printing press 1 is only shown with two printing units 9, 9 '. This is a simplification, normally there are four or more printing units 9, 9 ', ... These must also be considered here.
  • the multi-color printing press 1 has devices 2, 2 ', ... for the digital generation of partial color images 3, 3' ... on.
  • Each printing unit 9, 9 ', ... has image cylinders 10, 10', ... and image transfer cylinders 11, 11 ', ... and transfers partial color images 3, 3 ', ... to the printing substrates 5, these in the direction of arrow 23 is transported from the printing substrate carrier 12 through the printing press 1 become.
  • the partial color images 3, 3 ', ... such from the devices 2, 2', ... are generated so that they are transferred to the printing substrates 5 in register, controls 7, 7 ', ... are provided which control the devices 2, 2', ... in this way control that the beginning of the image, lines or areas of the partial color images 3, 3 ', ... on top of each other are coordinated.
  • Such controls 7, 7 ', ... can be designed so that each printing unit 9, 9', ... prints a register mark 8, 8 ', ... and these register marks 8, 8', ... from one Register sensor 17 can be detected.
  • the evaluation of the position of the register marks 8, 8 ', ... then results in the assignment of the partial color images 3, 3 ', ... and it can in the event of deviations such a correction is made that the partial color images 3, 3 ', ... are transferred in register to the printing substrates 5.
  • the image cylinders 10, 10 ', ... and if necessary also the image transfer cylinders 11, 11 ', ... with position detection elements 18, e.g. B. are equipped with rotary encoders.
  • Another rotary encoder 18 is provided on the drive roller 28 of the printing substrate carrier 12.
  • the invention solves this problem by a register correction due to a Changes in print-related factors 4, 4 ', 4 "the retroactive influence of Influencing variables 4, 4 ', 4 "of the previous printed page 33 are taken into account.
  • influencing variables 4, 4 ', 4 " is that an input device 14 data from printed pages are input, which via a Connection 24 forwarded from the input device 14 to the controls 7, 7 ', ... are, the controls 7, 7 ', ... based on this data of the printed pages retrieve stored empirical values 6, 6 ', 6 "from memories 13, 13', ... and this gives the influencing variables 4, 4 ', 4 ", which are controlled by the controls 7, 7', ... without delay.
  • the devices 2, 2 ', ... capable of digitally generating partial color images 3, 3', ... without interruption to be made in register.
  • the influencing variables 4, 4 ', 4 "and the influencing variables in the form of stored empirical values 6, 6 ', 6 " can be any influencing variables.
  • a connection 26 ′ to the press control 20 is possible, for example, the paper thickness 27 with further stored data 19 to link and in this way the influencing variable 4 'with inclusion of others To obtain properties of the printing substrate 5 used.
  • a device 15 for automatic detection of influencing variables, for example a sensor 16 for measurement of paper thicknesses 27 is expediently on a conveyor belt 22 for Feeding of printing substrates 5 to the printing press 1 is arranged.
  • Corresponding devices 15 for automatic detection can of course be used of influencing factors 4, 4 ', 4 "can also be arranged at other points and on others Train wise.
  • an image can be
  • a densitometer can be used to determine the toner profiles to win, which are then also supplied to the controls 7, 7 ', ...
  • Other options are conceivable.
  • the controls 7, 7 ', ... the partial color images 3, 3', ... the printing substrates 5 must be able to assign a sensor 21 at the beginning of the print substrate carrier 12 Detection of printing substrates 5 can be arranged, which transmits the controls 7, 7 ', ..., in which position a printing substrate 5 is on the printing substrate carrier 12 finds.
  • the list in the embodiment of FIG. 2 is not exhaustive and must be not all of the alternatives shown may be provided in the machine, for example it is also possible to connect only one input device 14 to the connection 24 Controls 7, 7 ', ... to be provided, which the stored empirical values 6, 6', 6 " retrieve based on manual input. Alternatively, it can be provided that the Influencing variables 4, 4 ', 4 "from stored data 19 by the press control 20 are removed. This can be done automatically or via an entry on the Input device 14 take place.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Electrophotography (AREA)
  • Color, Gradation (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Color Image Communication Systems (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP01109091A 2000-05-17 2001-04-12 Méthode et appareil pour l'ajustement de registre dans une imprimante couleur Expired - Lifetime EP1156382B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20468100P 2000-05-17 2000-05-17
US204681P 2000-05-17

Publications (3)

Publication Number Publication Date
EP1156382A2 true EP1156382A2 (fr) 2001-11-21
EP1156382A3 EP1156382A3 (fr) 2005-11-09
EP1156382B1 EP1156382B1 (fr) 2008-05-07

Family

ID=22758976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01109091A Expired - Lifetime EP1156382B1 (fr) 2000-05-17 2001-04-12 Méthode et appareil pour l'ajustement de registre dans une imprimante couleur

Country Status (4)

Country Link
US (1) US6522857B2 (fr)
EP (1) EP1156382B1 (fr)
AT (1) ATE394710T1 (fr)
DE (1) DE50113927D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304763A1 (de) * 2003-02-05 2004-08-26 Nexpress Solutions Llc Verfahren zur Korrektur der Kalibrierung eines passergenauen Druckprozesses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11822262B2 (en) 2021-09-28 2023-11-21 Eastman Kodak Company Registration of white toner using sensing system with colored reflector plate
US11829084B2 (en) 2021-09-28 2023-11-28 Eastman Kodak Company Registration of white toner in an electrophotographic printer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938756A (ja) * 1982-08-30 1984-03-02 Canon Inc 画像処理装置
JPS63297074A (ja) * 1987-05-29 1988-12-05 Konica Corp サ−マルプリンタ
JPH03149575A (ja) * 1989-11-07 1991-06-26 Hitachi Ltd カラープリンタ
US5689757A (en) * 1994-07-18 1997-11-18 Xerox Corporation Method and apparatus for detecting substrate roughness and controlling print quality
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
JP3691275B2 (ja) * 1998-06-12 2005-09-07 株式会社沖データ 電子写真プリンタ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304763A1 (de) * 2003-02-05 2004-08-26 Nexpress Solutions Llc Verfahren zur Korrektur der Kalibrierung eines passergenauen Druckprozesses

Also Published As

Publication number Publication date
EP1156382A3 (fr) 2005-11-09
US6522857B2 (en) 2003-02-18
US20010055505A1 (en) 2001-12-27
ATE394710T1 (de) 2008-05-15
DE50113927D1 (de) 2008-06-19
EP1156382B1 (fr) 2008-05-07

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