EP0456005B1 - Procédé pour déterminer les défauts d'un enregistrateur - Google Patents

Procédé pour déterminer les défauts d'un enregistrateur Download PDF

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Publication number
EP0456005B1
EP0456005B1 EP91105923A EP91105923A EP0456005B1 EP 0456005 B1 EP0456005 B1 EP 0456005B1 EP 91105923 A EP91105923 A EP 91105923A EP 91105923 A EP91105923 A EP 91105923A EP 0456005 B1 EP0456005 B1 EP 0456005B1
Authority
EP
European Patent Office
Prior art keywords
register
web
running direction
signals
pulse
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
EP91105923A
Other languages
German (de)
English (en)
Other versions
EP0456005A1 (fr
Inventor
Udo Blasius
Manfred Korinek
Jürgen Reithofer
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0456005A1 publication Critical patent/EP0456005A1/fr
Application granted granted Critical
Publication of EP0456005B1 publication Critical patent/EP0456005B1/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

Definitions

  • the invention relates to a method for determining register errors on a printed product provided with register marks, the register marks being opto-electrically scanned when the printed product passes through the printing press.
  • the register error measured on an oblique edge is perpendicular to the web running direction (lateral register error) Corrected the evaluation of the register error in the direction of web travel.
  • the object of the present invention is to achieve an improvement in the determination, in particular of the lateral register errors.
  • the method according to the invention is characterized in that the register marks are scanned by sensors with at least four essentially square sensor elements and that the register marks each have two edges which run at an opposite angle to the web running direction.
  • the method according to the invention has the advantage that the evaluation of the sensor signals requires little technical effort and that lateral register errors can be determined precisely. In addition, diagonal register errors can be determined using the method according to the invention.
  • register marks have further edges that run perpendicular to the web running direction. In this way, information about the register errors in the web running direction, also called circumferential register errors, can be obtained that is independent of the other register errors.
  • the register marks each consist of two right-angled triangles, which are arranged on both sides of a straight line running in the direction of web travel offset from one another in the web running direction in such a way that one catheter of the triangles lies on the straight line.
  • Fig. 1 shows an advantageous register mark, which consists of two right-angled triangles 1, 2 and is printed on a printed sheet in such a way that it is moved in the direction indicated by an arrow.
  • the register mark preferably has the dimensions given as an example in the drawing. This means that it takes up little space on the printed sheet and is not visible, for example, on a folded printed sheet if it is arranged on the fold line.
  • the inclined edges b and b * allow the positional deviation to be determined in a simple manner when scanning with the aid of one sensor each. With the edges a and a *, a deviation in the direction of web travel can be determined with the same sensors.
  • FIG. 2 shows the arrangement of four sensor elements 11, 12, 21, 22 in the form of a square.
  • Such an arrangement is available on the market, for example under the type designation SFH 204 from Siemens.
  • FIG. 3 shows the sensor 3, which has already been explained in connection with FIG. 2, with three register marks 4, 5, 6, which are of different colors, for example black (B), magenta (M) and yellow (Y) from one printing unit each of a printing press on the web running in the direction of the arrow are printed.
  • register marks 4, 5, 6, which are of different colors, for example black (B), magenta (M) and yellow (Y) from one printing unit each of a printing press on the web running in the direction of the arrow are printed.
  • B black
  • M magenta
  • Y yellow
  • the output signals of the sensor elements 11, 12, 21, 22 when the register marks 4, 5, 6 are scanned are shown in FIG. 4 as time diagrams, the individual lines being identified with the respective sensor element and the individual pulses with the colors of the register marks . If the signals shown were converted into binary signals with the aid of a threshold value comparator without further measures, their leading edges would depend on the respective steepness of the leading edges of the signals and thus on the respective color.
  • the inputs 13, 14, 15, 16 are supplied with the output signals of the sensor elements 11, 12, 21, 22, if necessary after appropriate amplification.
  • the output signals of two sensor elements located one behind the other in the web running direction are each subtracted in a subtraction circuit 17, 18.
  • the resulting signals 11-12 and 21-22 are also shown in Fig. 4.
  • the pulses PEAK1 and PEAK2 represent the point in time, regardless of the color, at which the respective register mark assumes a predetermined position. These points in time are compared in the computer 25 with one another or with a setpoint value, so that the registration is optimized by a corresponding control of the printing press.
  • the color of the respective registered register mark can be determined.
  • the signals A and B are each fed to an analog / digital converter 26, 27.
  • the analog / digital converters 26, 27 are triggered with PEAK1 or PEAK2.
  • an AND circuit 28, 29 is provided, to which on the one hand the respective pulse PEAK1 or PEAK2 and on the other hand a signal CONVERT are supplied by the computer 25. The latter defines a period in which the peak value can lie. The conversion of peak values of other signals can thus be excluded.
  • the output signals of the analog / digital converters 26, 27 are fed to corresponding inputs of the computer 25 and compared there with stored values of the degrees of absorption of the individual colors.
  • the result of this comparison represents information about the color of the register mark scanned in each case. This information can be used, for example, to feed the control signals generated by the computer to the correct printing unit.
  • the rectifiers 19, 20 are full-wave rectifiers, that is to say the parts of the output voltages of the subtracting circuits 17, 18 reaching into the negative are not suppressed but inverted.
  • the signals A 'and B' then have the form shown in FIG. 8.
  • Binary signals C and D are formed from the signals A 'and B' using threshold value comparators 31, 32. These are fed to inputs of the computer 25, where in each case the pulse center is calculated, which corresponds in time to the maximum amplitude (peak value) of the analog signal. By using this pulse center as a measure of the position of the register marks, no errors occur due to different rates of rise of the pulses.
  • the register marks 41, 42, 43 are each printed on the web in one color by a printing unit in such a way that, when correctly registered, they lie on a line shown in broken lines in FIG. 9 and have a defined distance S from one another.
  • FIG. 10 For various register errors, the temporal position of the pulse-shaped signals resulting from the scanning of the edges of the register marks 41 to 43 is shown in FIG.
  • the individual lines in FIG. 10 are given the same name with the sensor elements.
  • 10a shows the timing of the pulses when there are no register errors.
  • 10b there is a lateral register error, the scanned register mark being too low in the representation according to FIG. 9.
  • the pulses generated by sensor elements 11 and 12 have a delay.
  • This delay B represents a measure of the size of the lateral register error.
  • FIG. 10c shows the situation in the case of a lateral register error in the other direction - that is, the register mark is shifted upwards in the representation in FIG. 9.
  • 10d shows the pulses in the case of a lateral register error downwards and a diagonal register error A.
  • the register errors in the circumferential direction are determined on the basis of the time interval between the scanning of the individual register marks. Since only the pulses resulting from scanning a register mark are shown in FIG. 10, this is not apparent from FIG. 10.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Claims (9)

  1. Procédé de détermination d'erreurs de repérage sur un produit d'impression comportant des signes de repérage, les signes de repérage étant explorés par voie opto-électrique lors du défilement du produit d'impression dans la machine à imprimer, caractérisé en ce que les signes de repérage (1, 2) sont explorés par des détecteurs (3) comprenant au moins quatre éléments (11, 12, 21, 22) disposés sensiblement en carré et en ce que chacun des signes de repérage comporte des bords orientés obliquement suivant des angles opposés sur la direction de défilement d'une feuille continue de papier.
  2. Procédé selon la revendication 1, caractérisé en ce que les bords sont décalés dans la direction de défilement.
  3. Procédé selon la revendication 2, caractérisé en ce que les signes de repérage comportent d'autres bords qui sont perpendiculaires à la direction de défilement.
  4. Procédé selon la revendication 3, caractérisé en ce que chaque signe de repérage se compose de deux triangles rectangles (41, 42, 43) qui sont décalés l'un par rapport à l'autre dans la direction de défilement des deux côtés d'une droite orientée dans la direction de défilement de manière qu'un côté de l'angle droit de chacun des triangles se trouve sur la droite.
  5. Procédé selon la revendication 1, caractérisé en ce que des signaux en forme d'impulsions qui sont dérivés caractérisent chacun l'instant de l'exploration d'un bord du signe de repérage.
  6. Procédé selon la revendication 5, caractérisé en ce que les signaux générés par deux éléments d'exploration qui se succèdent dans la direction de défilement sont soustraits pour la formation du signal en forme d'impulsion.
  7. Procédé selon la revendication 5, caractérisé en ce que les signaux en forme d'impulsions sont comparés par comparaison des signaux de deux éléments détecteurs voisins perpendiculairement à la direction de défilement pour la détermination d'une erreur de repérage perpendiculaire à la direction de défilement.
  8. Procédé selon la revendication 5, caractérisé en ce que les signaux en forme d'impulsion sont comparés, lors de l'exploration d'un bord des signes de repérage qui est perpendiculaire à la direction de défilement, avec des signaux correspondants en forme d'impulsions d'un autre signe de repérage pour la détermination d'une erreur de repérage dans la direction de défilement.
  9. Procédé selon la revendication 5, caractérisé en ce que les signaux en forme d'impulsions qui sont produits, lors de l'exploration d'un bord perpendiculaire à la direction de défilement, à l'aide de deux éléments détecteurs voisins perpendiculairement à la direction de défilement sont comparés les uns aux autres pour la détermination d'erreurs de repérage en direction diagonale.
EP91105923A 1990-05-08 1991-04-13 Procédé pour déterminer les défauts d'un enregistrateur Expired - Lifetime EP0456005B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014708 1990-05-08
DE4014708A DE4014708C2 (de) 1990-05-08 1990-05-08 Verfahren zum Ermitteln von Registerfehlern

Publications (2)

Publication Number Publication Date
EP0456005A1 EP0456005A1 (fr) 1991-11-13
EP0456005B1 true EP0456005B1 (fr) 1993-10-13

Family

ID=6405940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105923A Expired - Lifetime EP0456005B1 (fr) 1990-05-08 1991-04-13 Procédé pour déterminer les défauts d'un enregistrateur

Country Status (5)

Country Link
US (1) US5247462A (fr)
EP (1) EP0456005B1 (fr)
JP (1) JP2572899B2 (fr)
CA (1) CA2041281A1 (fr)
DE (2) DE4014708C2 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238800A1 (de) * 1992-11-17 1994-05-19 Shinohara Machinery Co Verfahren zum Ausrichten von Druckplatten
DE4218760C2 (de) * 1992-06-06 2000-02-03 Heidelberger Druckmasch Ag Anordnung von Registermarken auf einem Druckprodukt und Verfahren zur Ermittlung von Registerabweichungen
US6199480B1 (en) * 1992-06-06 2001-03-13 Heideiberger Druckmaschinen Arrangement for determining register deviations of a multicolor rotary printing machine
DE4218762C2 (de) * 1992-06-06 2002-04-18 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Ermitteln von Registerfehlern auf einem mehrfarbig bedruckten laufenden Druckerzeugnis mit Registermarken
US5287162A (en) * 1992-06-16 1994-02-15 Xerox Corporation Method and apparatus for correction of color registration errors
GB9214664D0 (en) * 1992-07-10 1992-08-19 Wiggins Teape Group Ltd Watermark detection
DE4244278C1 (de) * 1992-12-28 1994-03-17 Heidelberger Druckmasch Ag Schaltungsanordnung zum Detektieren von im Mehrfarbendruck erzeugten Registermarken
DE4401535C2 (de) * 1994-01-20 2002-10-24 Heidelberger Druckmasch Ag Verfahren zum Abtasten von im Mehrfarbendruck erzeugten Registermarken
US5537190A (en) * 1994-12-12 1996-07-16 Xerox Corporation Method and apparatus to improve registration in a black first printing machine
DE29501373U1 (de) * 1995-01-30 1995-04-27 MAN Roland Druckmaschinen AG, 63075 Offenbach Vorrichtung zur Korrektur des Fan-Out-Effekts an Rollenrotationsdruckmaschinen
US6243618B1 (en) * 1997-10-30 2001-06-05 Honda Giken Kogyo Kabushiki Kaisha Method of marking number or the like and apparatus for marking the same
US6417223B1 (en) * 1998-09-23 2002-07-09 Research Development Foundation Tocopherols, tocotrienols, other chroman and side chain derivatives and uses therof
US6703384B2 (en) 1998-09-23 2004-03-09 Research Development Foundation Tocopherols, tocotrienols, other chroman and side chain derivatives and uses thereof
KR100847678B1 (ko) 2000-02-11 2008-07-23 리서치 디벨럽먼트 파운데이션 토코페롤, 토코트리에놀, 다른 크로만 및 측쇄 유도체, 및이들의 용도
DE10332879A1 (de) * 2003-07-19 2005-02-17 Nexpress Solutions Llc Verfahren zum Steuern einer Sensoreinrichtung und Sensoreinrichtung für eine Druckmaschine
DE102004021597B4 (de) 2004-05-03 2017-04-13 Heidelberger Druckmaschinen Ag Registermarke
DE102009035006B4 (de) * 2008-09-08 2019-06-06 Heidelberger Druckmaschinen Ag Intensitätsoptimierte Kontrollmarkenmessung
DE202008015780U1 (de) * 2008-11-28 2009-03-19 Saueressig Gmbh + Co. Kg Walzenpaar und Vorrichtung zum Ausrichten eines Walzenpaars
DE102012112486A1 (de) * 2012-12-18 2014-06-18 Océ Printing Systems GmbH & Co. KG Verfahren zum Steuern eines Farbdruckers oder Farbkopierers mit Hilfe von zusätzlich aufgedruckten Positionierungsmarken
EP2851207B1 (fr) 2013-07-25 2015-12-30 Oberthur Technologies Personnalisation de documents
JP2015197610A (ja) * 2014-04-01 2015-11-09 キヤノン株式会社 画像形成装置

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DE1049480B (de) * 1959-01-29 Siemens Schuckertwerke Aktiengesellschaft, Berlin und Erlangen Registerregelung fur Mehrfarben-Rotationsdruckmaschinen
US2802666A (en) * 1953-11-05 1957-08-13 Crosfield J F Ltd Register control systems for moving webs
US3701464A (en) * 1970-10-15 1972-10-31 Harris Intertype Corp Circumferential and lateral web registration control system
DE2643481A1 (de) * 1976-09-27 1978-03-30 Siemens Ag Einrichtung zum automatischen erkennen einer registerpassmarke
DE2731914A1 (de) * 1977-07-14 1979-01-25 Sick Optik Elektronik Erwin Verfahren und vorrichtung zur identifizierung von registermarken
US4264957A (en) * 1979-05-23 1981-04-28 Zerand Corporation Apparatus and method for register control in web processing apparatus
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US4888717A (en) * 1984-11-02 1989-12-19 Adolph Coors Company Web lateral position control apparatus and method
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JP2688898B2 (ja) * 1987-03-16 1997-12-10 大日本印刷株式会社 印刷物のマーク自動抽出装置
US5016182A (en) * 1988-12-29 1991-05-14 Stevens Graphics Corporation Register control means for web processing apparatus

Also Published As

Publication number Publication date
EP0456005A1 (fr) 1991-11-13
JP2572899B2 (ja) 1997-01-16
CA2041281A1 (fr) 1991-11-09
JPH04229269A (ja) 1992-08-18
DE4014708A1 (de) 1991-12-12
DE59100475D1 (de) 1993-11-18
US5247462A (en) 1993-09-21
DE4014708C2 (de) 1994-03-10

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