EP0410253B1 - Vorrichtung zur Durchführung einer umfassenden Qualitätskontrolle an Druckbogen - Google Patents

Vorrichtung zur Durchführung einer umfassenden Qualitätskontrolle an Druckbogen Download PDF

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Publication number
EP0410253B1
EP0410253B1 EP90113564A EP90113564A EP0410253B1 EP 0410253 B1 EP0410253 B1 EP 0410253B1 EP 90113564 A EP90113564 A EP 90113564A EP 90113564 A EP90113564 A EP 90113564A EP 0410253 B1 EP0410253 B1 EP 0410253B1
Authority
EP
European Patent Office
Prior art keywords
image
data
measuring
control
light source
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
EP90113564A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0410253A2 (de
EP0410253A3 (en
Inventor
Arno Wührl
Oded Zingher
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0410253A2 publication Critical patent/EP0410253A2/de
Publication of EP0410253A3 publication Critical patent/EP0410253A3/de
Application granted granted Critical
Publication of EP0410253B1 publication Critical patent/EP0410253B1/de
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
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

Definitions

  • the invention relates to a device according to the preamble of claim 1. Such a device is shown in DE-OS 33 25 006.
  • a matching table with a keyboard for the color remote control is provided.
  • the print sheet is recorded by a video camera and underlaid in an image mixer to display the setting of the color remote control.
  • the image composed in this way can be displayed on a display device.
  • There it can be seen directly for the entire printed image which settings of the color metering elements have been made in which areas. This makes it easier to directly assess the print result and current setting.
  • the assignment between display and operating elements remains problematic, which in the case shown is even worse, since the sheet with the keyboard is now completely separated from the display of the color zone profile.
  • a method and a device for determining and evaluating color measurement fields on a printed sheet have been proposed for color control systems.
  • the sheet position is taken into account when measuring and evaluating the print quality.
  • a direction finder practically every point on the printed sheet can be sighted and recorded for later measurement.
  • the sheet position on the pattern table designed as a coordinate measuring table is determined on the sheet edges by scanning elements.
  • the previously defined points for the quality control are then changed to a new one by the computer due to the changed sheet position defined coordinate system converted.
  • the previously specified distribution of the color measurement fields to be measured can thus be found automatically by the coordinate measuring table.
  • the scanning elements evaluate the position of the sheet edge twice in order to eliminate errors from damage.
  • the position of the printed images on the sheet also depends on various factors.
  • the position on the sheet does not always have to be the same in relation to all sheet edges.
  • the device of the coordinate measuring table is mechanically unwieldy and relatively expensive.
  • the assignment of the matching table, measuring devices and display device brings about an integration of operation, quality control and information transport, as was not yet known in the manner shown and which makes operation considerably safer.
  • the light source operating in the manner of a light pointer acts in several ways both in the presentation of information and in the acquisition of information.
  • the monitoring of the printed sheet is no longer dependent on mechanical conditions such. B. dependent on the sheet position, but can be oriented directly to the printed image.
  • This also results in the possibility of not only special measuring fields for recording the To use print quality, but also to measure directly in the print image, as is also proposed in new control strategies.
  • Particularly critical areas for quality features such as pushing, duplicating and the different coloring criteria can be selected separately.
  • a device for pattern recognition evaluates the position of the printed image and forwards the determined data for correcting the user guidance to the control of the light source.
  • the position of the measuring device during measurement can also be checked on the same device.
  • the control devices are also operated directly with the light source.
  • devices for detecting smaller parts of the image can be provided for their separate evaluation.
  • FIG. 1 shows the assignment of all means relating to the invention at a single work station.
  • a printed sheet P is placed on the matching table 1.
  • a table 2 below the inclined forward
  • a table 2 is fitted with a control panel 2 with a keyboard 2A for a color metering device 26 and an input device 2B for a register setting device 29. Both units sit on a control panel 3, which contains the electronic components for the device.
  • a rear wall 4, which carries a projection screen 5, is placed on the control panel 3.
  • a cover 6 is attached above the matching table 1, which, among other things, is also intended to accommodate a standard lighting fixture for the matching of the image.
  • a video camera 7 is attached to the cover 6, the lens 8 of which is directed onto the matching table 1. It can record the printed sheet P located there with its printed image B.
  • a light source 9 is arranged parallel to the video camera 7, the objective 10 of which emits bundled light beams 11A, B, C.
  • the light beam 11A is directed onto the matching table 1 for designating previously defined positions and is used for marking or user guidance.
  • a measuring device 12 is then used, for example, which is connected to the control panel 3 via a data line 13.
  • a marking 14 is attached to the measuring device 12.
  • the marking 14 can be identified with the help of the video camera 7.
  • a control device embedded in the control panel 3, for example a computer 15 merges the data streams from video camera 7, measuring device 12, control panel 2 and light source 9.
  • This display 16 can, for example, show the profile of the setting of Color metering elements of the color metering device 26, which are controlled from the keyboard 2A.
  • Control panel 2 Video camera 7, light source 9 and measuring device 12 are each connected to the computer 15 via control devices 17, 18, 19, 20.
  • an image memory 22 and a coordinate memory 23 are provided for the data of the video camera 7, an image memory 21 and for the data of the light source 9. All the data necessary for controlling the device are to be stored in the memories 21, 22 and 23.
  • the device is connected on the computer 15 via a data line 24 to the machine control 27 and on the control device 17 via a data line 25 with the control of the ink metering device 26, and a data line 28 with the register setting device 29.
  • a connection to a network 31 of a print shop controller is provided via a data line 30.
  • a screen 33 which has a control device 34 and a cursor control 36. These are connected to an image processing system 35 which is arranged between the computer 15, pattern recognition 32 and image memory 21.
  • the image memory 22 for the light source 9 is also connected to the control device 34 together with the image memory 21 via the image processing system 35.
  • the pattern recognition 32 is likewise arranged between the image memory 21 and the computer 15 and can optionally be coupled to a measuring device in the form of a hand scanner 12D.
  • the computer 15 first collects data necessary for the device, for example the sheet format, the measuring devices to be used and the type and structure of the printed image.
  • the keyboard 2A of the control panel 2 is to be used for this.
  • the computer 15 can also receive the data from a network 31 for print shop control. With this data, for example, the video camera 7 already corresponds to the sheet size preset and the selection of the measuring devices 12 specified. Control fields K and register marks R may also be present, the type and position of which must be determined.
  • the computer 15 taking over the position of the measuring devices 12 and their identification from the image in the memory 21 of the video camera 7. With the data obtained in this way, the quality control is carried out on the printed sheet P.
  • the position of the measuring fields is stored in the coordinate memory 23. With this data, the light source 9 will later be directed to the measuring fields for operator guidance with the aid of its control device 20, also in order to trigger the measuring process there, for example, if the measuring device 12 is struck by the light beam 11B when positioned correctly.
  • the pattern recognition 32 monitors both the position and the identification of the measuring device 12 currently used.
  • the results are displayed by the light source 9 on the projection screen 5 in the form of a graphic display 16.
  • the projection screen 5 can be fluorescent or light and contrast-enhancing.
  • the data are then also forwarded to the register setting device 29 and the ink metering device 26 via the data lines 25, 28. This can optionally be done by direct control of the controls.
  • the input device 2B for register control in the control panel 2 should be equipped as a sensor matrix, the sensor elements of which can output setting positions for the register setting device 29.
  • the device works as follows: A printed sheet is placed as a nominal sheet on the matching table 1 and recorded by the video camera 2. Boundary conditions such as format, measuring method, measuring devices, machine configuration and number of colors can be supplied by the network 31, where they are stored in a database. This makes it possible to adjust the lens 8 to the sheet size and to activate the pattern recognition 32 both for the necessary measuring devices 12 and for any control fields K and register marks R.
  • the print image B After saving the print image B, it is determined where measurements are to be made during quality control. For this purpose, a specific measuring sequence can be specified directly on the printed sheet P with the aid of the measuring devices 12, in that the necessary measuring points are approached with each measuring device 12. For this purpose, the measuring devices 12 with direction finders z. B. provided in the form of a cross-hair magnifier.
  • the video camera 7 records the markings 14 of the measuring devices 12 and uses the pattern recognition 32 to calculate the respective position, the data of which are stored in the coordinate memory 23.
  • the measurement points can also be defined in a simple manner in the image processing system 35 with the aid of a cursor control 36. If, as shown, this work is carried out at a special work station, the data transmission takes place, for example, with the network 31 to the computer 15 on the printing press.
  • the machine When all settings have been made, the machine is started and the first test sheets can be removed for quality control. The sequence and possibly also the time of the measurement are then determined by the computer 15 in accordance with the specifications of the work planner.
  • the pattern recognition 32 determines the position of the printed image B on the basis of prominent locations and thus defines a current coordinate system for the printed sheet P, which also follows when it slips is corrected.
  • the previously defined measuring points for the coordinate memory 23 are recalculated using the new coordinate system.
  • the light source 9 controls the measuring points individually via its light beam 11B as a pointer.
  • a measuring device 12 is activated and the use of the correct measuring device 12 is checked by the pattern recognition 32.
  • the measuring process can be carried out automatically. It is then triggered by a positive signal from the pattern recognition 32 or the light beam 11B, which a sensor on the measuring device 12 recognizes in the measuring position. If the operating personnel in the quality control determines that other critical points such. B. result from repercussions in the coloring with unfavorable division of areas, the presetting procedures with regard to area division and measurement point definition can be corrected and / or supplemented directly at this point during quality control. The operator no longer has to worry about all critical points, since the essential areas and measuring points are predefined. The operator can thus devote undivided attention to the printing process in its entire range or to special points.
  • the respective profile of the color zone setting can be shown on the display 16, as a result of which its assignment to the printed image B and the keyboard 2A is also ergonomically optimal.
  • the register setting device 29 is guided in the same way as the color metering device 26.
  • the input of new control values can take place manually on the input device 2B of the register control or via the light beam 11B of the light source 9. Then the input device 2B is designed as a sensor matrix.
  • the device allows a division of the work by setting up a special place for work preparation within a print shop becomes. There, highly qualified personnel can set up the processes for quality control. The data is then passed on to the respective workstations on the printing press. The machine staff is relieved of preparatory work and the error rate in quality control drops. For this reason, not all functions have to be available at all workplaces.
  • the space for work preparation can only consist of a screen 33 and the "measuring workstations" on the machines are equipped with video camera 7, light source 9 and measuring devices 12, for which there is no screen.
  • the space for work preparation A contains a computer 15 with a pattern recognition 32, an image processing system 35 and a screen 33.
  • the data about the printed image B are recorded in the printing house D from the work station on the printing press with the video camera 7 only available there transferred to the work preparation A with the network 31.
  • the assessment of the printed image B, the determination of the measuring devices 12, the marking of the measuring points and their sequence during the measurement run of the quality assurance, and also the definition of certain image areas to be monitored separately can be carried out solely on the screen 33 in the work preparation A.
  • the measurements are carried out in the printing house D, with the personnel being guided.
  • monitoring and display functions are thus to be seen as essential to the invention, which on the one hand opens up diverse possibilities for quality assurance on the printing press, but on the other hand also for rationalization for a workflow organization based on the division of labor.
  • the design of the performance can therefore be varied beyond the scope of the exemplary embodiment.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Image Processing (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Discharge By Other Means (AREA)
EP90113564A 1989-07-28 1990-07-16 Vorrichtung zur Durchführung einer umfassenden Qualitätskontrolle an Druckbogen Expired - Lifetime EP0410253B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924989 1989-07-24
DE3924989A DE3924989A1 (de) 1989-07-28 1989-07-28 Vorrichtung zur durchfuehrung einer umfassenden qualitaetskontrolle an druckbogen

Publications (3)

Publication Number Publication Date
EP0410253A2 EP0410253A2 (de) 1991-01-30
EP0410253A3 EP0410253A3 (en) 1991-07-31
EP0410253B1 true EP0410253B1 (de) 1994-06-01

Family

ID=6386025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113564A Expired - Lifetime EP0410253B1 (de) 1989-07-28 1990-07-16 Vorrichtung zur Durchführung einer umfassenden Qualitätskontrolle an Druckbogen

Country Status (5)

Country Link
US (1) US5163012A (enrdf_load_stackoverflow)
EP (1) EP0410253B1 (enrdf_load_stackoverflow)
JP (1) JPH07102683B2 (enrdf_load_stackoverflow)
AT (1) ATE106320T1 (enrdf_load_stackoverflow)
DE (2) DE3924989A1 (enrdf_load_stackoverflow)

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DE202009014632U1 (de) 2009-09-25 2010-06-17 Manroland Ag Klemmvorrichtung für Druckbögen an Messanlagen für Druckkontrollstreifen
DE202009016719U1 (de) 2009-09-25 2010-07-15 Manroland Ag Variabler Papieranschlag für ein Messpult
DE102009027262A1 (de) 2009-06-29 2011-03-03 Manroland Ag Abmusterungstisch einer Druckmaschine

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DE3324951A1 (de) * 1983-07-11 1985-01-24 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum ermitteln und auswerten von farbmessfeldern auf einem auf einem messtisch liegenden druckbogen mit einem densitometer
IT1172552B (it) * 1983-08-25 1987-06-18 Viptronic Sarl Sistema di rilievi densitometrici su striscie di controllo di stampe
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ATE29434T1 (de) * 1983-11-04 1987-09-15 Gretag Ag Verfahren und vorrichtung zur regelung der farbfuehrung bei einer offset-druckmaschine und mit einer entsprechenden vorrichtung ausgestattete offset-druckmaschine.
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JPH0640194B2 (ja) * 1985-10-15 1994-05-25 富士写真フイルム株式会社 写真焼付条件の設定管理方法
DE3614578A1 (de) * 1986-04-30 1987-11-05 Koenig & Bauer Ag Registersystem fuer eine rotationsdruckmaschine
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DE3826385A1 (de) * 1988-08-03 1990-02-08 Roland Man Druckmasch Vorrichtung zum auswerten von druckvorlagen
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027262A1 (de) 2009-06-29 2011-03-03 Manroland Ag Abmusterungstisch einer Druckmaschine
DE202009014632U1 (de) 2009-09-25 2010-06-17 Manroland Ag Klemmvorrichtung für Druckbögen an Messanlagen für Druckkontrollstreifen
DE202009016719U1 (de) 2009-09-25 2010-07-15 Manroland Ag Variabler Papieranschlag für ein Messpult

Also Published As

Publication number Publication date
EP0410253A2 (de) 1991-01-30
US5163012A (en) 1992-11-10
JPH03218836A (ja) 1991-09-26
DE3924989A1 (de) 1991-02-07
EP0410253A3 (en) 1991-07-31
ATE106320T1 (de) 1994-06-15
JPH07102683B2 (ja) 1995-11-08
DE59005891D1 (de) 1994-07-07
DE3924989C2 (enrdf_load_stackoverflow) 1991-05-08

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