EP0032535A1 - Device for the opto-electronic measurement of the area coverage of an offset printing plate or of a printed copy serving for the manufacture of the offset printing plate - Google Patents

Device for the opto-electronic measurement of the area coverage of an offset printing plate or of a printed copy serving for the manufacture of the offset printing plate Download PDF

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Publication number
EP0032535A1
EP0032535A1 EP80106889A EP80106889A EP0032535A1 EP 0032535 A1 EP0032535 A1 EP 0032535A1 EP 80106889 A EP80106889 A EP 80106889A EP 80106889 A EP80106889 A EP 80106889A EP 0032535 A1 EP0032535 A1 EP 0032535A1
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EP
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Prior art keywords
area coverage
offset printing
memory
measurement
printing plate
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EP80106889A
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German (de)
French (fr)
Inventor
Hans E. Mamberer
Dieter Hirt
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP0032535A1 publication Critical patent/EP0032535A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply

Definitions

  • the invention relates to a device for opto-electronic measurement of the area coverage of an offset printing plate or a printing template serving for the production of offset printing plates, the brightness distribution of which is detected by recording elements and can be fed to a computing and evaluation circuit for generating signals for the adjustment of ink fountain keys.
  • DE-A 26 18 387 discloses a film scanning device for determining the area coverage of a film, in particular a film assembly for producing an offset printing plate, with a light source that shines through the film over its entire width and a light directed onto it and separated from it by the film Transducer described.
  • the sensor is divided into several zones and connected to a device for evaluating the measured values.
  • the signals obtained as a result are used to control ink fountain keys in the inking units of offset rotary printing presses.
  • the size of the signals derived from different measuring zones is subject to measurements on one Print template different boundary conditions. These boundary conditions are e.g. B.
  • the object of the invention is to provide a device for opto-electronic measurement of the area coverage of a template in which the influence of the boundary conditions mentioned can be automatically compensated for at all points in the template, while the calibration should only take a little time and in which manual adjustment of the sensitivity and the threshold voltage of the individual integrators is unnecessary.
  • a measurement type preselection circuit for setting a first operating mode, in which a first calibration standard with minimal area coverage and a second calibration standard with maximum area coverage can be evaluated in a measured value recording and converting device and the difference values derived from the calibration standards can be stored in a table memory, or one second operating mode in which a measurement object can be evaluated in the measurement value acquisition and converter device, the measurement signals of which are compared in a computer with the values of the table memory and the determined comparison values can be fed to a display device and / or a measurement value memory.
  • a measurement object C which can be, for example, a film assembly for producing an offset printing plate, is measured zone by zone using the transmitted light method.
  • the measurement object C is transported by the device by means of transport devices (not shown here), for example different pairs of rollers, the measurement object being zoned in terms of its area coverage, i.e. H. of the light-dark ratio is measured.
  • the measurement object C is penetrated by the rays coming from a light source 1, which are then detected by the cross-sectional converter 2 and supplied to photodiodes 3 via light guides.
  • the number of cross-sectional converters 2 used depends on the zone width with which the measurement object A is to be measured. This zone width is in turn identical to the ink zone width of the printing press in which the original is reproduced.
  • the detected light intensity is converted into corresponding electrical signals in the photodiodes 3.
  • the signals generated in the photodiodes 3 are each integrated in an integrator 4 for one zone and fed to a computer 5.
  • a measuring mode preselection circuit 6 is connected to the computer 5, with which the mode of operation of the device can be preset. With the measuring mode preselection circuit 6, a first operating mode can be set, in which the device, ie between the light source 1 and the cross-sectional converter 2, a first and a second calibration standard can be introduced, from which differential signals are derived in a manner to be described.
  • a display 7, which preferably consists of light-emitting diodes, is also connected to the computer 5.
  • the measured value memory 8 shown in FIG. 1 in the form of a cassette, a disk, a floppy disc or a semiconductor memory can also be integrated in the computer 5.
  • a corresponding calibration standard A (FIG. 2) is introduced into the device according to FIG. 1 after the measurement type preselection circuit 6 has been actuated accordingly.
  • This calibration standard A has a minimal area coverage, which can be "white", for example.
  • a second calibration standard B is entered into the device according to FIG. 1, which has a maximum area coverage , e.g. B. has "black”.
  • the signals derived from the calibration standard B are compared with those derived from the calibration standard A and the difference signals determined are stored in a table memory.
  • the circuit structure for this is shown in block diagram form in FIG. 2.
  • the computer 5 used in FIG. 1 comprises a switch 9 and an arithmetic 10, in which the said difference signals are determined from the calibration standards A and B. These digitized signals are stored in the table memory 11 after digitization.
  • the signals derived from this are compared with the values determined in the table memory 11 for each zone and the associated value is fed via an output circuit 12 to the display 7 and / or the measured value memory 8.
  • the control of the device according to FIG. 1 is carried out by a control logic 13, to which a program memory 14 is assigned, in the computer 5.
  • the computer 5 is preceded by the measured value detection circuit 15, which comprises at least the light source 1 shown in FIG. 1 and the cross-sectional converter 2.
  • the measured value detection circuit 15 is followed by integrators 16, a multiplexer 17 and analog / digital converter 18.
  • integrators 16 By using the analog / digital converter 18, the signals derived from the calibration standards A and B and from the measurement object C can already be supplied to the computer 5 in digital form. These components together form the measurement value acquisition and converter device 19.
  • a microprocessor is preferably used as the computer 5, which can be set by the measuring mode preselection circuit 6 either to a first operating mode for the calibration process or to a second operating mode for the measurement of measurement objects.

Abstract

Die Vorrichtung zur optischen Messung der Flächendeckung einer Offset-Druckplatte oder einer der Offset-Druckplattenherstellung dienenden Druckvorlage, deren Helligkeitsverteilung durch Aufnahmeelemente erfaßt und einer Rechen- und Auswerteschaltung (5, 19) zur Erzeugung von Signalen für die Einstellung von Farbzonenschrauben verwendet wird, enthält eine Meßvorwahlschaltung (6). Durch diese ist eine erste Betriebsart einstellbar, bei der ein erstes Eichnormal (A) mit minimaler Flächendeckung und ein zweites Eichnormal (B) mit maximaler Flächendeckung in der Vorrichtung auswertbar ist. Von diesen Eichnormalen (A, B) werden entsprechende Differenzsignale gebildet, die in einem Tabellenspeicher (11) gespeichert und mit den vom Meßobjekt (C) abgeleiteten Signalen verglichen werden. Die zugehörigen Werte werden in einer Leuchtdiodenanzeige (7) und/oder in einem Speicher (8) angezeigt bzw. abgespeichert.The device for the optical measurement of the area coverage of an offset printing plate or a printing template used for the production of offset printing plates, the brightness distribution of which is detected by recording elements and a computing and evaluation circuit (5, 19) is used to generate signals for the adjustment of ink fountain keys, contains one Measuring preselection circuit (6). This enables a first operating mode to be set in which a first calibration standard (A) with minimal area coverage and a second calibration standard (B) with maximum area coverage can be evaluated in the device. Corresponding difference signals are formed from these calibration standards (A, B), which are stored in a table memory (11) and compared with the signals derived from the measurement object (C). The associated values are displayed or stored in an LED display (7) and / or in a memory (8).

Description

Die Erfindung betrifft eine Vorrichtung zur opto-elektronischen Messung der Flächendeckung einer Offset-Druckplatte oder einer der Offset-Druckplattenherstellung dienenden Druckvorlage, deren Helligkeitsverteilung durch Aufnahmeelemente erfaßt und einer Rechen- und Auswerteschaltung zur Erzeugung von Signalen für die Einstellung von Farbzonenschrauben zuführbar ist.The invention relates to a device for opto-electronic measurement of the area coverage of an offset printing plate or a printing template serving for the production of offset printing plates, the brightness distribution of which is detected by recording elements and can be fed to a computing and evaluation circuit for generating signals for the adjustment of ink fountain keys.

In der DE-Offenlegungsschrift 26 18 387 ist ein Film-Abtastgerät zur Ermittlung der Flächendeckung eines Films, insbesondere einer Filmmontage zur Herstellung einer Offset-Druckplatte, mit einer den Film auf seiner gesamten Breite durchstrahlenden Lichtquelle und einem darauf gerichteten, durch den Film hiervon getrennten Aufnehmer beschrieben. Der Aufnehmer ist in mehrere Zonen unterteilt und mit einer Einrichtung zur Auswertung der gemessenen Werte verbunden. Die als Ergebnis gewonnenen Signale dienen zur Steuerung von Farbzonenschrauben in den Farbwerken von Offset-Rotationsdruckmaschinen. Bei diesem bekannten Filmabtastgerät unterliegt die Größe der von verschiedenen Meßzonen abgeleiteten Signale bei Messungen an einer Druckvorlage verschiedenen Randbedingungen. Diese Randbedingungen sind z. B. geringere Lichtintensität der Beleuchtungsquelle an den Randbereichen, differierende Streulichteinflüsse und Fertigungstoleranzen der opto-elektronischen Bauelemente. Nachdem bei gleichem Meßobjekt und gleichen Flächendeckungsverhältnissen auch gleiche Ausgangssignale erzeugt werden müssen, ist eine häufige Justierung, beispielsweise der in derartigen Vorrichtungen verwendeten Integratoren zur Eliminierung der genannten Fehlereinflüsse, unumgänglich. Diese Justagen sind naturgemäß zeitaufwendig und können jeweils nur für ein Meßobjekt mit bestimmter Materialeigenschaft vorgenommen werden.DE-A 26 18 387 discloses a film scanning device for determining the area coverage of a film, in particular a film assembly for producing an offset printing plate, with a light source that shines through the film over its entire width and a light directed onto it and separated from it by the film Transducer described. The sensor is divided into several zones and connected to a device for evaluating the measured values. The signals obtained as a result are used to control ink fountain keys in the inking units of offset rotary printing presses. In this known film scanner, the size of the signals derived from different measuring zones is subject to measurements on one Print template different boundary conditions. These boundary conditions are e.g. B. lower light intensity of the illumination source at the edge areas, different stray light influences and manufacturing tolerances of the opto-electronic components. Since the same output signals and the same area coverage ratios must also be used to generate the same output signals, frequent adjustment, for example of the integrators used in such devices for eliminating the above-mentioned error influences, is essential. These adjustments are naturally time-consuming and can only be carried out for one test object with a certain material property.

Die Aufgabe der Erfindung besteht in der Schaffung einer Vorrichtung zur opto-elektronischen Messung der Flächendeckung einer Vorlage, in der der Einfluß der genannten Randbedingungen an allen Stellen der Vorlage automatisch kompensierbar ist, während die Eichung nur wenig Zeit in Anspruch nehmen soll und bei der sich eine manuelle Justierung der Empfindlichkeit und der Einsatzspannung der einzelnen Integratoren erübrigt.The object of the invention is to provide a device for opto-electronic measurement of the area coverage of a template in which the influence of the boundary conditions mentioned can be automatically compensated for at all points in the template, while the calibration should only take a little time and in which manual adjustment of the sensitivity and the threshold voltage of the individual integrators is unnecessary.

Diese Aufgabe wird gelöst durch eine Meßartvorwahlschaltung zur Einstellung einer ersten Betriebsart, bei der ein erstes Eichnormal mit minimaler Flächendeckung und ein zweites Eichnormal mit maximaler Flächendeckung in einer Meßwerterfassungs- und Wandlervorrichtung auswertbar und die von den Eichnormalen abgeleiteten Differenzwerte in einem Tabellenspeicher abspeicherbar sind, oder einer zweiten Betriebsart, bei der ein Meßobjekt in der Meßwerterfassungs- und Wandlervorrichtung auswertbar ist, dessen Meßsignale in einem Rechner mit den Werten des Tabellenspeichers verglichen werden und die ermittelten Vergleichswerte einer Anzeigevorrichtung und/oder einem Meßwertspeicher zuführbar sind.This object is achieved by a measurement type preselection circuit for setting a first operating mode, in which a first calibration standard with minimal area coverage and a second calibration standard with maximum area coverage can be evaluated in a measured value recording and converting device and the difference values derived from the calibration standards can be stored in a table memory, or one second operating mode in which a measurement object can be evaluated in the measurement value acquisition and converter device, the measurement signals of which are compared in a computer with the values of the table memory and the determined comparison values can be fed to a display device and / or a measurement value memory.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen und aus der Beschreibung in Verbindung mit den Zeichnungen.Advantageous further developments result from the subclaims and from the description in conjunction with the drawings.

Die erfindungsgemäße Vorrichtung weist den Vorteil auf, daß die Eichung nach Umschaltung einer Meßartvorwahlschaltung lediglich durch Einschieben von zwei Eichnormalen durchgeführt werden kann, deren Format identisch mit dem des Meßobjektes ist. Diese Eichnormale werden, wie das Meßobjekt selbst, in der Vorrichtung ausgemessen und die aus diesen ermittelten Differenzsignale als Referenzsignale abgespeichert. Nach einer vorteilhaften Weiterbildung der erfindungsgemäßen Vorrichtung werden die Differenzsignale digitalisiert, wobei die Stufenzahl der digitalisierten Signale, die in einer Wertetabelle abspeicherbar sind, gleich der Anzahl der in einer die Flächendeckung optisch anzeigenden Anzeigevorrichtung verwendeten Anzeigeelemente ist. Durch den Vergleich der von dem Meßobjekt abgeleiteten Signale mit den jeweiligen in der Wertetabelle gespeicherten Signalen erfolgt automatisch eine Eliminierung der die Meßergebnisse verfälschenden störenden Randbedingungen. Durch eine entsprechende Dimensionierung der verwendeten Speicher können Differenzeichwerte für mehrere Arten von Meßobjekten ermittelt und in der Vorrichtung abgespeichert werden. Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels im einzelnen beschrieben, wobei Bezug auf die beiliegenden Zeichnungen genommen wird. In diesen zeigen:

  • Fig. 1 eine schematische Darstellung der Vorrichtung gemäß der Erfindung,
  • Fig. 2 ein detaillierteres Blockschaltbild zur Erläuterung des Schaltungsaufbaues der Vorrichtung gemäß Fig. 1.
The device according to the invention has the advantage that the calibration can only be carried out after inserting a measurement type preselection circuit by inserting two calibration standards, the format of which is identical to that of the measurement object. These calibration standards, like the measurement object itself, are measured in the device and the difference signals determined from them are stored as reference signals. According to an advantageous development of the device according to the invention, the difference signals are digitized, the number of stages of the digitized signals which can be stored in a value table being equal to the number of display elements used in a display device which optically indicates the area coverage. By comparing the signals derived from the measurement object with the respective signals stored in the value table, the disturbing boundary conditions falsifying the measurement results are automatically eliminated. By appropriate dimensioning of the memories used, difference values for several types of measurement objects can be determined and stored in the device. The invention is described in detail below using an exemplary embodiment, reference being made to the accompanying drawings. In these show:
  • 1 is a schematic representation of the device according to the invention,
  • FIG. 2 shows a more detailed block diagram to explain the circuit structure of the device according to FIG. 1.

In der Vorrichtung gemäß Fig. 1 wird ein Meßobjekt C, das beispielsweise eine Filmmontage zur Herstellung einer Offset-Druckplatte sein kann, zonenweise nach dem Durchlichtverfahren ausgemessen. Für diesen Zweck erfolgt ein Transport des Meßobjektes C mittels hier nicht dargestellten Transportvorrichtungen, beispielsweise verschiedenen Walzenpaaren durch das Gerät, wobei während des Transportes das Meßobjekt zonenweise bezüglich seiner Flächendeckung, d. h. des Hell-Dunkelverhältnisses, ausgemessen wird. Hierbei wird das Meßobjekt C von den von einer Lichtquelle 1 kommenden Strahlen durchsetzt, die anschließend vom Querschnittswandler 2 erfaßt und über Lichtleiter Photodioden 3 zugeführt werden.In the device according to FIG. 1, a measurement object C, which can be, for example, a film assembly for producing an offset printing plate, is measured zone by zone using the transmitted light method. For this purpose, the measurement object C is transported by the device by means of transport devices (not shown here), for example different pairs of rollers, the measurement object being zoned in terms of its area coverage, i.e. H. of the light-dark ratio is measured. In this case, the measurement object C is penetrated by the rays coming from a light source 1, which are then detected by the cross-sectional converter 2 and supplied to photodiodes 3 via light guides.

Die Anzahl der verwendeten Querschnittswandler 2 hängt von der Zonenbreite ab, mit der das Meßobjekt A ausgemessen werden soll. Diese Zonenbreite wiederum ist identisch mit der Farbzonenbreite der Druckmaschine, in der eine Reproduktion der Vorlage erfolgt.The number of cross-sectional converters 2 used depends on the zone width with which the measurement object A is to be measured. This zone width is in turn identical to the ink zone width of the printing press in which the original is reproduced.

In den Photodioden 3 erfolgt eine Umwandlung der erfaßten Lichtintensität in entsprechende elektrische Signale.The detected light intensity is converted into corresponding electrical signals in the photodiodes 3.

Die in den Photodioden 3 erzeugten Signale werden jeweils für eine Zone in einem Integrator 4 integriert und einem Rechner 5 zugeleitet. Mit dem Rechner 5 ist eine Meßartvorwahlschaltung 6 verbunden, mit dem die Betriebsweise der Vorrichtung voreingestellt werden kann. Mit der Meßartvorwahlschaltung 6 ist eine erste Betriebsart einstellbar, bei der in die Vorrichtung, d. h. zwischen die Lichtquelle 1 und den Querschnittswandler 2, ein erstes und ein zweites Eichnormal einführbar sind, von denen in noch zu beschreibender Weise Differenzsignale abgeleitet werden. Mit dem Rechner 5 ist desweiteren eine Anzeige 7 verbunden, die vorzugsweise aus Leuchtdioden besteht. Der in Fig. 1 dargestellte Meßwertspeicher 8 in Form einer Kassette, einer Platte, einer Floppy Disc oder eines Halbleiterspeichers kann auch in dem Rechner 5 integriert sein. Bei der Einstellung einer zweiten Betriebsart mittels der Meßartvorwahlschaltung 6 wird dann ein Meßobjekt C ausgewertet.The signals generated in the photodiodes 3 are each integrated in an integrator 4 for one zone and fed to a computer 5. A measuring mode preselection circuit 6 is connected to the computer 5, with which the mode of operation of the device can be preset. With the measuring mode preselection circuit 6, a first operating mode can be set, in which the device, ie between the light source 1 and the cross-sectional converter 2, a first and a second calibration standard can be introduced, from which differential signals are derived in a manner to be described. A display 7, which preferably consists of light-emitting diodes, is also connected to the computer 5. The measured value memory 8 shown in FIG. 1 in the form of a cassette, a disk, a floppy disc or a semiconductor memory can also be integrated in the computer 5. When setting a second operating mode by means of the measurement type preselection circuit 6, a measurement object C is then evaluated.

Bei der Eichung der Vorrichtung wird nach entsprechender Betätigung der Meßartvorwahlschaltung 6 ein erstes Eichnormal A (Fig. 2) in die Vorrichtung gemäß Fig. 1 eingeführt. Dieses Eichnormal A besitzt eine minimale Flächendeckung, die beispielsweise "weiß" sein kann. Nachdem das Eichnormal A zonenweise in der Vorrichtung gemäß Fig. 1 ausgemessen und die von diesem abgeleiteten elektrischen Signale integriert und in dem Rechner 5 zumindest vorübergehend gespeichert wurden, erfolgt die Eingabe eines zweiten Eichnormals B in die Vorrichtung gemäß Fig. 1, das eine maximale Flächendeckung, z. B. "schwarz" aufweist. Die von dem Eichnormal B abgeleiteten Signale werden mit denen von dem Eichnormal A abgeleiteten Signalen verglichen und die ermittelten Differenzsignale in einem Tabellenspeicher abgespeichert.When the device is calibrated, a corresponding calibration standard A (FIG. 2) is introduced into the device according to FIG. 1 after the measurement type preselection circuit 6 has been actuated accordingly. This calibration standard A has a minimal area coverage, which can be "white", for example. After the calibration standard A has been measured zone by zone in the device according to FIG. 1 and the electrical signals derived from it have been integrated and at least temporarily stored in the computer 5, a second calibration standard B is entered into the device according to FIG. 1, which has a maximum area coverage , e.g. B. has "black". The signals derived from the calibration standard B are compared with those derived from the calibration standard A and the difference signals determined are stored in a table memory.

Der Schaltungsaufbau dafür ist in Fig. 2 blockschaltbildförmig dargestellt. Der in Fig. 1 verwendete Rechner 5 umfaßt eine Weiche 9 und eine Arithmetik 10, in der die genannten Differenzsignale aus den Eichnormalen A und B ermittelt werden. Diese Differenzsignale werden nach einer Digitalisierung in dem Tabellenspeicher 11 gespeichert. Bei der Ausmessung eines Meßobjektes C, z. B. einer Filmmontage, werden die von diesem abgeleiteten Signale mit den in dem Tabellenspeicher 11 für jede Zone ermittelten Werten verglichen und der zugehörige Wert über eine Ausgabeschaltung 12 der Anzeige 7 und/oder dem Meßwertspeicher 8 zugeführt.The circuit structure for this is shown in block diagram form in FIG. 2. The computer 5 used in FIG. 1 comprises a switch 9 and an arithmetic 10, in which the said difference signals are determined from the calibration standards A and B. These digitized signals are stored in the table memory 11 after digitization. When measuring a measurement object C, e.g. B. a film montage, the signals derived from this are compared with the values determined in the table memory 11 for each zone and the associated value is fed via an output circuit 12 to the display 7 and / or the measured value memory 8.

Die Steuerung der Vorrichtung gemäß Fig. 1 wird durch eine Steuerlogik 13, der ein Programmspeicher 14 zugeordnet ist, im Rechner 5 vorgenommen. Dem Rechner 5 vorgeschaltet ist die Meßwerterfassungsschaltung 15, die zumindest die in Fig. 1 gezeigte Lichtquelle 1 und die Querschnittswandler 2 umfaßt. Der Meßwerterfassungsschaltung 15 sind Integratoren 16, ein Multiplexer 17 und Analog/Digitalwandler 18 nachgeschaltet. Durch die Verwendung der Analog/Digital-Wandler 18 können bereits dem Rechner 5 die aus den Eichnormalen A und B sowie von dem Meßobjekt C abgeleiteten Signale in digitaler Form zugeführt werden. Diese Bauteile zusammen bilden die Meßwerterfassungs- und Wandlervorrichtung19.The control of the device according to FIG. 1 is carried out by a control logic 13, to which a program memory 14 is assigned, in the computer 5. The computer 5 is preceded by the measured value detection circuit 15, which comprises at least the light source 1 shown in FIG. 1 and the cross-sectional converter 2. The measured value detection circuit 15 is followed by integrators 16, a multiplexer 17 and analog / digital converter 18. By using the analog / digital converter 18, the signals derived from the calibration standards A and B and from the measurement object C can already be supplied to the computer 5 in digital form. These components together form the measurement value acquisition and converter device 19.

Als Rechner 5 wird vorzugsweise ein Mikroprozessor verwendet, der durch die Meßartvorwahlschaltung 6 entweder auf eine erste Betriebsart für den Eichvorgang oder auf eine zweite Betriebsart für die Messung von Meßobjekten einstellbar ist.A microprocessor is preferably used as the computer 5, which can be set by the measuring mode preselection circuit 6 either to a first operating mode for the calibration process or to a second operating mode for the measurement of measurement objects.

Claims (7)

1. Vorrichtung zur opto-elektronischen Messung der Flächendeckung einer Offset-Druckplatte oder einer der Offset-Druckplattenherstellung dienenden Druckvorlage, deren Helligkeitsverteilung durch Aufnahmeelemente erfaßt und einer Rechen- und Auswerteschaltung zur Erzeugung von Signalen für die Einstellung von Farbzonenschrauben zuführbar ist, gekennzeichnet durch eine Meßartvorwahlschaltung (6) zur Einstellung einer ersten Betriebsart, bei der ein erstes Eichnormal (A) mit minimaler Flächendeckung und ein zweites Eichnormal (B) mit maximaler Flächendeckung in einer Meßwerterfassungs-und Wandlervorrichtung (19) auswertbar und die von den Eichnormalen (A, B) abgeleiteten Differenzwerte in einem Tabellenspeicher (11) abspeicherbar sind, oder einer zweiten Betriebsart, bei der ein Meßobjekt (C) in der Meßwerterfassungs- und Wandlervorrichtung (19) auswertbar ist, dessen Meßsignale in einem Rechner (5) mit den Werten des Tabellenspeichers (11) verglichen werden und die ermittelten Vergleichswerte einer Anzeigevorrichtung (7) und/oder einem Meßwertspeicher (8) zuführbar sind.1.Device for opto-electronic measurement of the area coverage of an offset printing plate or a printing template serving for the production of offset printing plates, the brightness distribution of which is detected by recording elements and can be fed to an arithmetic and evaluation circuit for generating signals for the adjustment of ink fountain keys, characterized by a measuring mode preselection circuit (6) for setting a first operating mode in which a first calibration standard (A) with minimal area coverage and a second calibration standard (B) with maximum area coverage can be evaluated in a measured value recording and converting device (19), and which are verified by the calibration standards (A, B) derived differential values can be stored in a table memory (11), or a second operating mode in which a measurement object (C) can be evaluated in the measurement value acquisition and converter device (19), the measurement signals of which in a computer (5) with the values of the table memory (11 ) are compared and the determined comparison values can be fed to a display device (7) and / or a measured value memory (8). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die von den Eichnormalen (A, B) ermittelten Differenzwerte in digitaler Form in dem Tabellenspeicher (11) speicherbar sind.2. Device according to claim 1, characterized in that the difference values determined by the calibration standards (A, B) can be stored in digital form in the table memory (11). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Eichnormale (A, B) und Meßobjekt (C) mittels Querschnittswandler (2) zonenweise abtastbar sind.3. Apparatus according to claim 1 or 2, characterized in that calibration standards (A, B) and measurement object (C) can be scanned in zones by means of cross-sectional transducers (2). 4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kapazität der Speicher (11, 8) so bemessen ist, daß Eichnormale (A, B) für mehrere Arten von Meßobjekten (C) auswertbar und die ermittelten Eichwerte abspeicherbar sind.4. Apparatus according to claim 1 or 2, characterized in that the capacity of the memory (11, 8) is dimensioned such that calibration standards (A, B) for several types of measurement objects (C) can be evaluated and the determined calibration values can be stored. 5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Anzeige (7) eine Leuchtdiodenanzeige ist.5. Device according to one of the preceding claims, characterized in that the display (7) is a light-emitting diode display. 6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Meßwertspeicher (8) ein Magnetbandspeicher oder ein Plattenspeicher ist.6. Device according to one of the preceding claims, characterized in that the measured value memory (8) is a magnetic tape memory or a disk memory. 7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Rechner (5) ein Mikroprozessor ist.7. Device according to one of the preceding claims, characterized in that the computer (5) is a microprocessor.
EP80106889A 1979-12-15 1980-11-08 Device for the opto-electronic measurement of the area coverage of an offset printing plate or of a printed copy serving for the manufacture of the offset printing plate Withdrawn EP0032535A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792950650 DE2950650A1 (en) 1979-12-15 1979-12-15 DEVICE FOR OPTO-ELECTRONIC MEASURING OF THE SURFACE COVERAGE OF AN OFFSET PRINT PLATE OR OF A PRINT TEMPLATE serving to manufacture OFFSET PRINT PLATES
DE2950650 1979-12-15

Publications (1)

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EP0032535A1 true EP0032535A1 (en) 1981-07-29

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EP80106889A Withdrawn EP0032535A1 (en) 1979-12-15 1980-11-08 Device for the opto-electronic measurement of the area coverage of an offset printing plate or of a printed copy serving for the manufacture of the offset printing plate

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Country Link
US (1) US4384337A (en)
EP (1) EP0032535A1 (en)
JP (1) JPS5697838A (en)
DE (1) DE2950650A1 (en)

Cited By (4)

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EP0105478A2 (en) * 1982-09-30 1984-04-18 Harris Graphics Corporation Apparatus for determining image areas from films and plates
EP0115839A2 (en) * 1983-01-31 1984-08-15 Komori Printing Machinery Co., Ltd. Method of measuring image area
EP0143228A1 (en) * 1983-09-21 1985-06-05 Albert-Frankenthal AG Method and apparatus for controlling the regulating means of the colour zones of an ink supply
EP0533043A1 (en) * 1991-09-14 1993-03-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Arrangement for photoelectrically monitoring the movement of webs or sheets, in particular paper webs in rotary printing machines

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DE3220282C3 (en) * 1982-05-28 1995-05-18 Roland Man Druckmasch Device for operationally recording a measure of the amount of dampening solution on the rotating printing plate in offset printing machines
DE3220800C2 (en) * 1982-06-03 1986-10-30 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device for scanning printing plates
US4706206A (en) * 1983-09-20 1987-11-10 Kollmorgen Technologies Corporation Color printing control using halftone control areas
JPS61102253A (en) * 1984-10-26 1986-05-20 Dainippon Screen Mfg Co Ltd Acquisition of printing ink supply amount and apparatus thereof
US4841859A (en) * 1988-11-21 1989-06-27 Komori Printing Machinery Co., Ltd. Side lay control apparatus for sheet-fed printing press
DD277885A1 (en) * 1988-12-15 1990-04-18 Polygraph Leipzig ADDITIONAL EQUIPMENT FOR A PLATE SCANNER
EP0881819A3 (en) 1997-05-22 2000-11-15 Samsung Electronics Co., Ltd. Deviation connection system for scanning

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US3958509A (en) * 1974-06-13 1976-05-25 Harris Corporation Image scan and ink control system

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US3835777A (en) * 1973-01-16 1974-09-17 Harris Intertype Corp Ink density control system
DE2618387A1 (en) * 1976-04-27 1977-11-17 Maschf Augsburg Nuernberg Ag FILM SCANNER
DE2728738B2 (en) * 1977-06-25 1979-05-10 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Eulrichtung for checking and regulating the coloring on printing machines
GB2024457B (en) * 1978-06-07 1983-01-06 Harris Corp Printing press ready and control system

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FR2148820A5 (en) * 1971-08-04 1973-03-23 Marinoni
US3958509A (en) * 1974-06-13 1976-05-25 Harris Corporation Image scan and ink control system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105478A2 (en) * 1982-09-30 1984-04-18 Harris Graphics Corporation Apparatus for determining image areas from films and plates
EP0105478A3 (en) * 1982-09-30 1985-12-04 Harris Graphics Corporation Apparatus for determining image areas from films and plates
EP0115839A2 (en) * 1983-01-31 1984-08-15 Komori Printing Machinery Co., Ltd. Method of measuring image area
EP0115839A3 (en) * 1983-01-31 1985-06-12 Komori Printing Machinery Co., Ltd. Method and system of measuring image area
EP0143228A1 (en) * 1983-09-21 1985-06-05 Albert-Frankenthal AG Method and apparatus for controlling the regulating means of the colour zones of an ink supply
EP0533043A1 (en) * 1991-09-14 1993-03-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Arrangement for photoelectrically monitoring the movement of webs or sheets, in particular paper webs in rotary printing machines

Also Published As

Publication number Publication date
DE2950650A1 (en) 1981-06-19
JPS5697838A (en) 1981-08-06
US4384337A (en) 1983-05-17

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