EP0504486A1 - Procédé pour imprimer en registre en plusieurs couleurs, une bande de matériau, particulièrement un matériau mince - Google Patents

Procédé pour imprimer en registre en plusieurs couleurs, une bande de matériau, particulièrement un matériau mince Download PDF

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Publication number
EP0504486A1
EP0504486A1 EP91121656A EP91121656A EP0504486A1 EP 0504486 A1 EP0504486 A1 EP 0504486A1 EP 91121656 A EP91121656 A EP 91121656A EP 91121656 A EP91121656 A EP 91121656A EP 0504486 A1 EP0504486 A1 EP 0504486A1
Authority
EP
European Patent Office
Prior art keywords
printing
sensor
web
printed
strip
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.)
Withdrawn
Application number
EP91121656A
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German (de)
English (en)
Inventor
Dieter Bock
Ferdinand Helm
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.)
Hueck and Cie
Original Assignee
Hueck and Cie
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 Hueck and Cie filed Critical Hueck and Cie
Publication of EP0504486A1 publication Critical patent/EP0504486A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices

Definitions

  • the invention is directed to a method for register-accurate, multicolored printing on a material web, such as a film web or the like, the material web being pulled off a supply roll and being guided in the longitudinal direction through a plurality of printing units, the printing cylinder of each printing unit being a partial printing image printed in a specific printing ink, with markings being printed on the material web which are optically scanned by means of a sensor to detect the relative position of the printing cylinders with respect to the material web by means of a sensor, and the respective printing cylinder being displaced transversely to the transport direction as a function of a detected deviation.
  • Deviations in the transverse direction can also be due to the fact that after the use of a supply roll, the front end of a new supply roll is glued to the rear end of the used web without interruption of operation, with a lateral displacement of up to 10 mm being possible in the transverse direction . This naturally leads to very considerable disturbances in the printed image and to waste if this lateral course cannot be effectively compensated for.
  • This lateral run results from the fact that individual rollers deviate from the exact longitudinal direction and e.g. by gluing a roll with a left sheet with a subsequent roll with a right sheet an offset occurs.
  • a deflection roller around which the material web is guided, can be swiveled out or in, so that the web length between the printing units can be corrected in the desired direction in accordance with the determined deviation.
  • the correction can also be made by relative rotation of the corresponding printing cylinder with a constant path respectively.
  • these transverse markings have already been designed as triangular wedges which are printed on by each printing cylinder. A comparison of the relative position of these wedges to one another shows any transverse displacement that may have occurred.
  • the sensors for determining the longitudinal register not only detect the edge of the marking which is perpendicular to the transport direction, but also the rear, oblique side of the wedge. This makes it possible to record the time period between the front vertical and the rear oblique edge.
  • an extension of this time interval means a displacement of the material web from the desired position to the blunt end of the wedge and a decrease in the interval a shift towards the pointed wedge end. From this, a signal for the transverse deviation of the pre-printed material web relative to the printing cylinder and its printing image can be obtained, and the printing cylinder can be shifted laterally via an assigned adjusting mechanism in such a way that an adaptation of the printing image is achieved again.
  • the regulation suffers from the fact that the detection of any deviations is carried out intermittently according to the distance between the printed wedges.
  • the object of the invention is to develop a method of the type mentioned at the outset in such a way that a more accurate and faster tracking of printing cylinders is achieved if a lateral offset of a printed section of a film is found.
  • each subsequent printing cylinder is assigned a sensor which scans at least one of the two outer edges of the strip.
  • Such a sensor preferably works in such a way that it consists of two sides corresponding to two scanned reflection areas, each reflection area being composed of two areas of different brightness, for example a darker area corresponding to the printed line and a lighter area corresponding to the base material.
  • An average gray value is formed by integrating the brightness values, this gray value ideally being the same as a centered printed line between the two sensor sides and thus an exactly aligned film for both sensor sides.
  • each sensor is arranged upstream of each subsequent pressure cylinder.
  • a lateral deviation is determined and also corrected before the printing process, so that not only, as in the prior art, misprints occurring after a certain transport duration or distance are avoided, but the occurrence of such misprints is prevented from the outset because, until the respective printing cylinder is reached, the roller position is already adjusted in accordance with the deviation of the side position of the material web.
  • the sensor itself can be adjusted transversely to the transport direction by means of an adjusting device which is coupled with the adjusting device of the assigned printing cylinder without play and without delay and exactly the same Covered way.
  • This coupling can take place mechanically, for example via threaded spindles, hydraulically or by an electric motor via synchronized electric motors, for example stepper motors. This ensures that the sensor always starts from a set position that is determined to be suitable, regardless of the original zero point.
  • the sensor detects a lateral deviation and the respective printing cylinder is displaced to compensate for this lateral deviation, this does not lead to the sensor continuing to detect a deviation, but there is practically mechanical feedback to the sensor, which accordingly only returns to the sensor Control device will signal a deviation, even if the trailing rollers position no longer corresponds to the target position for the partial print image to be applied.
  • the adjustment devices for the pressure cylinders and / or the sensors are prestressed. Such a preload avoids play without, on the other hand, the risk of jamming.
  • the preload can be set mechanically, for example, by a spring, such as a helical spring, or also by a hydraulic or pneumatic pressure build-up.
  • the first printing cylinder prints with a color with a high contrast to the material web to be printed. If, for example, a transparent plastic film is printed, the vertical stripe can be colored dark, e.g. blue.
  • a white or possibly glossy longitudinal stripe can be printed if such colors appear in the printed image.
  • the sensors for the detection of the longitudinal register or longitudinal register are coupled to the adjustment unit of the sensor for the detection of the lateral register in a cross-adjustable manner.
  • the transverse markings can have a smaller width than conventionally because the inventive one Excellent readjustment allowed.
  • this also means that the entire strip provided for the markings is made narrower and material can thereby be saved.
  • a printing machine shown in the drawing comprises a plurality of printing units 1, 2, 3, the components of which are each mounted on a longitudinal cross-piece 4 and vertical supports 5, which is only indicated schematically.
  • the supports 5 rest on the floor 6.
  • Each printing unit 1 or 2 or 3 comprises a printing cylinder 7, each printing cylinder cooperating with an impression roller 7 '.
  • Each of the printing cylinders 7 in the printing units 1, 2, 3 bears a specific color and thus a partial printed image on a plastic film web 8 drawn off from a supply roll (not shown), which runs in the direction of arrow 9, that is to say from the right in the drawing left, is transported.
  • the printed ink is dried in a subsequent drying station 10.
  • a sensor 11 ' is arranged downstream of each printing cylinder 7.
  • the sensor 11 ' can detect the time interval between successive transverse markings on the film web 8 in a manner known per se.
  • the so-called “longitudinal register” can be derived or checked from this. Accordingly, if a correction must be made in the longitudinal direction, rollers 13 pivotably mounted in the direction of arrow 12 are adjusted so that the film web 8 deflected around these rollers 13 has to travel a larger or smaller distance between the printing units or a larger or smaller one Sets path. This regulation of the longitudinal pass is known per se.
  • Another sensor 11 serves to regulate the lateral adjustment of the pressure cylinders 7 in the plane perpendicular to FIG. 1 or in the direction of the arrow 14 in FIG. 2.
  • the first printing unit 1 seen in the direction of transport has a continuous longitudinal stripe 15 in a contrasting color, e.g. blue on a transparent film, printed.
  • the printed longitudinal strip 15 is dried in the drying device 10 of the printing unit 1 and accordingly can subsequently be used to control the positioning of the subsequent partial printed images with regard to their transverse or lateral position.
  • the print to be applied to the film web 8 consists of a plurality of periodically printed images 16, which are composed of partial print images each in a specific color. These partial print images are marked with B, G, R, W. Depending on the printing process and print motif, these partial print images can lie strictly delimited next to one another or partially one above the other. In any case, in order to reproduce perfect color transitions and contours, it is necessary for the partial printed images B, G, R, W to be positioned exactly in the longitudinal and transverse directions.
  • the senor 11 which consists of two sensor sides 11a, 11b, is used for positioning in the lateral direction.
  • Each sensor side is formed by an individual light receiver, which receives the light from a light source which radiates on the longitudinal strip 15 and is reflected by the irradiated area.
  • Either a separate light source or a common light source can be provided for both sides 11a, 11b, problems with relative intensity fluctuations of individual light sources being avoided by the latter solutions.
  • the reflection region 17a, 17b of each sensor side 11a, 11b drawn in a circle in the drawing reflects a specific gray value, which depends on which region of the reflection surface 17a, 17b the longitudinal strip 15, which in the exemplary embodiment is darker and correspondingly less reflective, takes up. If the sensor 11 or the material web 8 with the longitudinal strip 15 are in the zero position relative to one another, both sensor sides 11a, 11b have the same gray value, i.e. the two outer edges 18a, 18b of the longitudinal strip 15 then pass through the reflection regions 17a, 17b, which are round in the exemplary embodiment, at the center thereof.
  • the longitudinal strip 15 is laterally offset relative to the sensor 11, as indicated by the arrow 14 in FIG. 2.
  • the reflection area 17b now receives less reflected light and the reflection area 17a more because of the larger surface area of the strip 15. From this signal difference in the sensor sides 11a and 11b, the extent of the side deviation can be deduced, and the pressure cylinder 7, which is arranged downstream of the respective sensor 11 in the transport direction (arrow 9), is now displaced transversely to the transport direction, so that a correction has already been made, when the section of the film web 8 to be printed reaches the respective printing cylinder 7.
  • the distance of the sensor 11 to the pressure cylinder 7 is chosen so that on the one hand the control speed is sufficient to enable readjustment until the pressure cylinder 7 is reached, but on the other hand the distance is not so large that an error occurs again after the readjustment has taken place can.
  • the sensor 11 is coupled with an adjusting device assigned to it without play and without delay with the adjusting device for the assigned printing cylinder, so that it is laterally displaced under the action of the control device to the same extent as the printing cylinder.
  • the principle of the control according to the invention is not limited to the monitoring of a printed longitudinal strip with two sensors or partial sensors assigned to each side edge of this longitudinal strip, but that an improved control compared to the prior art can also be achieved in this way that only one side edge of the longitudinal strip or the outer edge of the material web is monitored, in which case only a higher outlay is required for the control electronics.
EP91121656A 1991-03-20 1991-12-18 Procédé pour imprimer en registre en plusieurs couleurs, une bande de matériau, particulièrement un matériau mince Withdrawn EP0504486A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914109062 DE4109062A1 (de) 1991-03-20 1991-03-20 Verfahren zum passergenauen, mehrfarbigen bedrucken einer materialbahn, insbesondere einer folienbahn
DE4109062 1991-03-20

Publications (1)

Publication Number Publication Date
EP0504486A1 true EP0504486A1 (fr) 1992-09-23

Family

ID=6427739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121656A Withdrawn EP0504486A1 (fr) 1991-03-20 1991-12-18 Procédé pour imprimer en registre en plusieurs couleurs, une bande de matériau, particulièrement un matériau mince

Country Status (2)

Country Link
EP (1) EP0504486A1 (fr)
DE (1) DE4109062A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318016A1 (fr) 2001-12-07 2003-06-11 Hueck Folien Gesellschaft m.b.H. Procédé pour superposer plusieurs couches imprimées en registre, produits imprimés par ce procédé et leur application
EP1433596A1 (fr) * 2002-12-24 2004-06-30 ELTROMAT GmbH Méthode et appareil pour la mesure, la mise au point et l'ajustement du repérage latéral et longitudinal, ainsi que du repérage du parallélisme dans une machine d'impression multicouleur
WO2008116951A1 (fr) 2007-03-27 2008-10-02 Kontrelmec, Sl Imprimante flexographique avec ajustement d'alignement latéral simplifié
CN104853922A (zh) * 2012-11-13 2015-08-19 温德默勒&霍乐沙两合公司 用于对准串联式印刷机的印刷单元的监控系统
EP2138318B2 (fr) † 2008-06-27 2015-11-18 Giesecke & Devrient GmbH Elément de sécurité doté d'évidements et son procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1822902A (en) * 1929-06-12 1931-09-15 Edmund B Osborne Means for securing register of impressions in web-fed printing machines
US2220736A (en) * 1937-05-05 1940-11-05 Stockton Profile Gauge Corp Apparatus for detecting web alignment
US4694181A (en) * 1986-07-07 1987-09-15 Piller Richard G Web lateral position control system using both coarse and fine mode control means

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963819C (de) * 1949-04-25 1957-05-16 Asea Ab Anordnung zur Messung oder Regelung der Phasenlage eines periodischen mechanischen Vorgangs, beispielsweise zur Registerkontrolle von Farbendruckpressen
JPS48101960A (fr) * 1972-04-06 1973-12-21
US3919561A (en) * 1974-05-28 1975-11-11 Hurletronaltair Inc Register control scanner assembly and method
US4025025A (en) * 1974-05-30 1977-05-24 Agfa-Gevaert, A.G. Apparatus for scanning a marked web
JPS5385282A (en) * 1976-12-30 1978-07-27 Tokyo Kikai Seisakushiyo Kk Detecting device for position of side edge of running body
DE3142316A1 (de) * 1981-10-24 1983-05-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Einrichtung zum regeln der seitlichen lage einer bedruckstoffbahn in rollendruckmaschinen
DE3218866C2 (de) * 1982-05-19 1986-11-27 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zur Bestimmung und Verstellung der Lage einer Materialbahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1822902A (en) * 1929-06-12 1931-09-15 Edmund B Osborne Means for securing register of impressions in web-fed printing machines
US2220736A (en) * 1937-05-05 1940-11-05 Stockton Profile Gauge Corp Apparatus for detecting web alignment
US4694181A (en) * 1986-07-07 1987-09-15 Piller Richard G Web lateral position control system using both coarse and fine mode control means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318016A1 (fr) 2001-12-07 2003-06-11 Hueck Folien Gesellschaft m.b.H. Procédé pour superposer plusieurs couches imprimées en registre, produits imprimés par ce procédé et leur application
EP1433596A1 (fr) * 2002-12-24 2004-06-30 ELTROMAT GmbH Méthode et appareil pour la mesure, la mise au point et l'ajustement du repérage latéral et longitudinal, ainsi que du repérage du parallélisme dans une machine d'impression multicouleur
WO2008116951A1 (fr) 2007-03-27 2008-10-02 Kontrelmec, Sl Imprimante flexographique avec ajustement d'alignement latéral simplifié
EP2138318B2 (fr) † 2008-06-27 2015-11-18 Giesecke & Devrient GmbH Elément de sécurité doté d'évidements et son procédé de fabrication
CN104853922A (zh) * 2012-11-13 2015-08-19 温德默勒&霍乐沙两合公司 用于对准串联式印刷机的印刷单元的监控系统
EP2919993B1 (fr) 2012-11-13 2017-03-22 Windmöller & Hölscher KG Système de surveillance pour l'orientation de groupes d'impression d'une machine à imprimer en ligne
EP2919993B2 (fr) † 2012-11-13 2019-12-18 Windmöller & Hölscher KG Système de surveillance pour l'orientation de groupes d'impression d'une machine à imprimer en ligne

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Publication number Publication date
DE4109062A1 (de) 1992-09-24

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