EP1285757B1 - Procédé et machine d'impression pour déterminer les défauts de repérage - Google Patents

Procédé et machine d'impression pour déterminer les défauts de repérage Download PDF

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Publication number
EP1285757B1
EP1285757B1 EP02006044A EP02006044A EP1285757B1 EP 1285757 B1 EP1285757 B1 EP 1285757B1 EP 02006044 A EP02006044 A EP 02006044A EP 02006044 A EP02006044 A EP 02006044A EP 1285757 B1 EP1285757 B1 EP 1285757B1
Authority
EP
European Patent Office
Prior art keywords
sheet
printing
registration
registration mark
conveyor belt
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
EP02006044A
Other languages
German (de)
English (en)
Other versions
EP1285757A1 (fr
Inventor
Ingo Klaus Michael Dreher
Heiko Hunold
Patrick Dr. Metzler
Stefan Schrader
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 EP1285757A1 publication Critical patent/EP1285757A1/fr
Application granted granted Critical
Publication of EP1285757B1 publication Critical patent/EP1285757B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • 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
    • B41P2233/50—Marks on printed material
    • B41P2233/52—Marks on printed material for registering

Definitions

  • the invention relates to a method according to claim 1 and to a printing machine for carrying out the method according to claim 3.
  • Fig. 1 shows two diagrams for describing the register error with respect to the invention.
  • the upper illustration shows a side view of an intermediate cylinder 25 of a printing machine, on which an image is applied from a Be retailungszylinder 23.
  • the intermediate cylinder 25 moves at the angular velocity ⁇ 1 in the direction of the curved arrow and presses with the force F on the surface of an endless conveyor belt 1, which moves in the direction of the arrow to the left.
  • ⁇ 1 in the direction of the curved arrow and presses with the force F on the surface of an endless conveyor belt 1, which moves in the direction of the arrow to the left.
  • the lower illustration is similar to the upper illustration, wherein in the lower illustration there is a sheet 3 of paper on the conveyor belt 1, by gravity and essentially by electrostatic attraction forces is held on the conveyor belt 1.
  • the arc 3 under the intermediate cylinder 25 influences the movement of the intermediate cylinder 25 such that the speed of the intermediate cylinder 25 changes in comparison to the upper illustration.
  • the conveyor belt 1 is depressed in the lower representation in the region of the intermediate cylinder 25 in comparison to the upper representation about the length corresponding to the thickness of the sheet 3.
  • the angular velocity ⁇ of the intermediate cylinder 25 of the lower illustration is now ⁇ 2 compared to the upper illustration due to the arc 3 between the conveyor belt 1 and the intermediate cylinder 25.
  • This speed change due to the sheet 3 results in registration errors in printing, as described in detail below.
  • Fig. 2 shows two views, each with a plan view of a portion of a conveyor belt 1, which moves in the direction of the arrow.
  • the upper illustration shows only for reasons of clarification a first register mark 5 and a second register mark 6, the leading edges of which have a time interval between the detection by a second sensor 13 behind the printing modules of the printing press, which can be described unambiguously by a number of cycles In this case, the clock number TaktzahI SOLL .
  • the lower illustration shows a section of a conveyor belt 1, similar to that of the upper illustration.
  • the angular velocity of the intermediate cylinder 25 from ⁇ 1 to ⁇ 2 .
  • the sheet 3 exerts a braking effect on the movement of the intermediate cylinder 25 on the conveyor belt 1.
  • Between the intermediate cylinder 25 and the conveyor belt 1 is a frictional engagement. If the intermediate cylinder 25 after passing through the sheet 3 again directly to the conveyor belt 1 and not to the sheet 3 attacks, again the speed ⁇ 1 on the intermediate cylinder 25, until another sheet 3 is conveyed under the intermediate cylinder 25, on the one another image is applied by the intermediate cylinder 25.
  • the speed change of the intermediate cylinder 25 with sheet 3 leads to errors in transferring the image from the intermediate cylinder 25 to the sheet 3, as the ratio of the speeds of the conveyor belt 1 and the angular velocity ⁇ of the intermediate cylinder 25 changes, this ratio for the register-containing application of the image on the sheet 3 is essential.
  • a calibration run for determining the register error is performed by means of an arrangement of the lower representation of FIG.
  • the first sensor 12 first detects the leading edge of the first register mark 5 and then the leading edge of the second register mark 6, corresponding to the upper view of FIG. 2.
  • the number of cycles between the detection of the leading edges of the register marks 5, 6 in this case is not clock number SOLL but deviates by an amount by which the mark register, the second is applied 6 due to the above-described effect later on the sheet.
  • 3 passes in the bottom Representation of FIG. 2, a time between the detection of the leading edge of the first register mark 5 and the leading edge of the second register mark 6, which is a clock number clock number IST assignable, which is greater than the number of cycles clock number SOLL .
  • the clock difference DIFF clock number can be determined, which describes the number of cycles , which is counted by the influence of the sheet 3 between the detection of the front edges of the register marks 5, 6 more than without Sheet 3.
  • the clock difference clock number DIFF consequently the influence of the sheet 3 on the registration of the image to be printed on the sheet 3 can be quantized and corrected by suitable means.
  • Fig. 3 shows a schematic side view of a device 10 with a part of a printing module of a printing press above the conveyor belt 1.
  • the printing press on several printing modules, for each color a printing module, where the individual colors put together to the overall picture.
  • the conveyor belt 1 is driven by the drive on the second guide roller 14 and moves in the direction of the arrow.
  • the first guide roller 16, the second guide roller 14, a pressure roller 27 for providing a counter force to the pressing force of the intermediate cylinder 25, the intermediate cylinder 25 and the imaging cylinder 23 move in the directions shown in Fig. 3.
  • the imaging cylinder 23 and the intermediate cylinder 25 have a first encoder 24 and a second encoder 26, respectively, which detect a certain rotational angle of the imaging cylinder 23 and the intermediate cylinder 25, respectively, so that the rotational angle is known at all times.
  • a first sensor 12 at the beginning of the conveyor belt 1 detects the leading edge of the sheet 3 and in response transmits a signal to a clock counter 20.
  • a further signal is generated which triggers the imaging of the imaging cylinder 23 by means of an imaging device 22.
  • the further signal takes place precisely at a point in time that the image transmitted to the imaging cylinder 23 is unrolled onto the intermediate cylinder 25 and transferred from it to the sheet 3 exactly at the correct location. This is possible by knowing the speed of the conveyor belt 1 with sheet 3 and the distance of the first sensor 12 and the sensor signal generated by this from the transfer point of the image between the intermediate cylinder 25 and the sheet 3, the nip or nip.
  • the time difference between the further signal and the application of the image, which is caused by the further signal is defined here as a delay time, which is uniquely associated with a delay value, which is shown as a clock number.
  • a delay time which is uniquely associated with a delay value, which is shown as a clock number.
  • the second sensor 13 at the end of the printing module detects the front edge of the first register mark 5 and the front edge of the second register mark 6 and transmits signals to a correction device 30, which Starting clock counter 20 when detecting the leading edge of the first register mark 5 and stop when detecting the leading edge of the second register mark 6.
  • a cycle number clock number IST is obtained, which refers to the distance of the front edge of the first register mark 5 to the front edge of the second register mark 6 and with the aid of the speed of the conveyor belt 1 is convertible into this distance.
  • the cycle number cycle number IST is assignable to the time which elapses from the detection of the front edge of the first register mark 5 until the detection of the front edge of the second register mark 6, since a clock number can uniquely be assigned a time.
  • the number of cycles number of cycles IST differs from the number of cycles number of cycles SOLL for the reason that the arc 3 causes a change in the angular velocity ⁇ of the intermediate cylinder 25 in relation to the conveyor belt 1 when passing through the nip between the intermediate cylinder 25 and the conveyor belt 1.
  • This effect is not detectable in the first register mark 5, since this is detected in front of the sheet 3, as shown in Fig. 3 can be seen.
  • the effect can be determined by the difference clock number DIFF . is formed from the detected number of cycles clock number IST and a stored number of cycles number of tact SOLL .
  • the difference clock number DIFF uniquely describes the register error caused by the above effect.
  • the described calibration run can be performed several times to increase the sensitivity in determining the register error.
  • the difference number of cycles DIFF is averaged for this purpose.
  • the delay value represented as a cycle number is changed by the difference between the cycle number DIFF .
  • Now there is a corrected delay value which takes into account the above-described register error.
  • the pressure following the calibration run uses the corrected deceleration value. Consequently, the imaging device 22 begins to transmit the corresponding image at a different time than without the calibration run described above.
  • image in connection with this invention designates image lines, image sections and images of individual color separations of the printing modules, which are composed to form the overall image.
  • the above description includes embodiments with sheet 3. However, the invention extends across all types of non-continuous stock and is not limited to sheet 3.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Sheets Or Webs (AREA)

Claims (5)

  1. Procédé de définition d'erreurs de registre pendant l'impression causées par des vitesses variables d'une bande de transport (1) et d'une feuille (3) déplacée par cette bande,
    caractérisé par l'application d'au moins une première marque de registre (5) sur la bande de transport (1) et d'au moins une deuxième marque de registre (6) sur la feuille (3), par la détection de la première marque de registre (5) et de la deuxième marque de registre (6), le calcul de l'écartement entre la première marque de registre (5) et la deuxième marque de registre (6) et une comparaison de cet écartement à une valeur de consigne.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la feuille (3) est détectée par un premier capteur (12) devant les modules d'impression, ce capteur générant, au moment de la détection de la feuille (3), un signal de départ pour lancer un compteur d'impulsions (20), en ce que les marques de registre (5, 6) sont appliquées par les modules d'impression et en ce que les marques de registre (5, 6) sont détectées par un deuxième capteur (13) derrière les modules d'impression, ce capteur générant un signal d'arrêt pour arrêter le compteur d'impulsions.
  3. Imprimante utilisée pour appliquer le procédé selon la revendication 1,
    caractérisée par un dispositif (10) de détection d'erreurs de registre causées pendant l'impression par une vitesse variable entre une bande de transport (1) et une feuille (3) déplacée par cette bande, comprenant des moyens d'application d'au moins une première marque de registre (5) sur la bande de transport (1) et au moins une deuxième marque de registre (6) sur la feuille (3), des moyens de détection de la première marque de registre (5) et de la deuxième marque de registre (6), des moyens de calcul de l'écartement entre la première marque de registre (5) et la deuxième marque de registre (6) et des moyens de comparaison de la valeur de l'écartement à une valeur de consigne.
  4. Imprimante selon la revendication 3,
    caractérisée par un dispositif de correction (30) corrigeant les erreurs de registre déterminées.
  5. Imprimante selon la revendication 3 ou 4,
    caractérisée par un premier capteur (12) générant un signal de départ pour lancer un compteur d'impulsions (20) au moment de la détection d'une feuille (3), des modules d'impression appliquant des marques de registre (5, 6), un deuxième capteur (13) générant un signal d'arrêt pour arrêter le compteur d'impulsions (20) et un dispositif de correction (30) corrigeant les erreurs de registre causées par la vitesse variable d'une bande de transport (1) et d'une feuille (3) déplacée par cette bande.
EP02006044A 2001-08-22 2002-03-16 Procédé et machine d'impression pour déterminer les défauts de repérage Expired - Lifetime EP1285757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10141035 2001-08-22
DE10141035A DE10141035A1 (de) 2001-08-22 2001-08-22 Verfahren und Druckmaschine zum Ermitteln von Registerfehlern

Publications (2)

Publication Number Publication Date
EP1285757A1 EP1285757A1 (fr) 2003-02-26
EP1285757B1 true EP1285757B1 (fr) 2006-10-18

Family

ID=7696180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006044A Expired - Lifetime EP1285757B1 (fr) 2001-08-22 2002-03-16 Procédé et machine d'impression pour déterminer les défauts de repérage

Country Status (4)

Country Link
US (1) US6718879B2 (fr)
EP (1) EP1285757B1 (fr)
JP (1) JP2003072035A (fr)
DE (2) DE10141035A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3687634B2 (ja) * 2002-07-26 2005-08-24 ブラザー工業株式会社 プリンタ
DE10241609A1 (de) * 2002-09-07 2004-03-18 Nexpress Solutions Llc Verfahren und Steuerungseinrichtung zum Bestimmen eines Registerfehlers
DE10305047B4 (de) * 2002-10-11 2010-08-12 Eastman Kodak Company Verfahren zur Kalibrierung des passergenauen Druckprozesses einer Farbdruckmaschine
DE10304763A1 (de) 2003-02-05 2004-08-26 Nexpress Solutions Llc Verfahren zur Korrektur der Kalibrierung eines passergenauen Druckprozesses
KR100472487B1 (ko) * 2003-03-07 2005-03-09 삼성전자주식회사 화상 정렬 오차 보정방법 및 장치
DE10333626A1 (de) * 2003-07-24 2005-02-17 Robert Bürkle GmbH Vorrichtung zum Bedrucken von flächigen Werkstücken
RS53165B (en) 2007-03-14 2014-06-30 Bionsil S.R.L. BTK INHIBITORS FOR THE TREATMENT OF CHEMOTHERAPY-RESISTANT EPITHELIC TUMORS
GB0705260D0 (en) * 2007-03-19 2007-04-25 Field Group Plc Rotary embossing
US20100196072A1 (en) 2009-02-03 2010-08-05 Xerox Corporation Modular color xerographic printing architecture
US8526054B2 (en) * 2009-04-27 2013-09-03 Xerox Corporation Dynamic image registration apparatus and method
JP2015230394A (ja) * 2014-06-05 2015-12-21 株式会社リコー 画像形成装置
US20160142571A1 (en) 2014-11-18 2016-05-19 Oce-Technologies B.V. Calibration system for a conveyor mechanism and a method for calibrating a conveyor mechanism
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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625454A (en) 1979-01-11 1981-03-11 Satoshi Kawakatsu Textile printing device
JP3454996B2 (ja) * 1995-12-22 2003-10-06 富士通株式会社 カラー画像形成装置
US5963240A (en) * 1996-02-02 1999-10-05 Ricoh Company, Ltd. Deflecting mirror adjusting device for an image forming apparatus
JPH10142895A (ja) * 1996-11-07 1998-05-29 Ricoh Co Ltd カラー画像形成装置
JPH10198110A (ja) * 1996-11-18 1998-07-31 Ricoh Co Ltd カラー画像形成方法
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
DE19854343A1 (de) * 1998-11-25 2000-05-31 Roland Man Druckmasch Vorrichtung und Verfahren zur Kompensation von Schlupf einer Druckformhülse
JP2000272089A (ja) 1999-03-24 2000-10-03 Tdk Corp 印刷位置ズレ補正方法

Also Published As

Publication number Publication date
EP1285757A1 (fr) 2003-02-26
DE10141035A1 (de) 2003-03-20
US6718879B2 (en) 2004-04-13
DE50208478D1 (de) 2006-11-30
US20030037689A1 (en) 2003-02-27
JP2003072035A (ja) 2003-03-12

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