EP0434072A2 - Bande de contrôle d'impression - Google Patents

Bande de contrôle d'impression Download PDF

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Publication number
EP0434072A2
EP0434072A2 EP90124979A EP90124979A EP0434072A2 EP 0434072 A2 EP0434072 A2 EP 0434072A2 EP 90124979 A EP90124979 A EP 90124979A EP 90124979 A EP90124979 A EP 90124979A EP 0434072 A2 EP0434072 A2 EP 0434072A2
Authority
EP
European Patent Office
Prior art keywords
sequence
fields
color
control strip
measuring
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Withdrawn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
EP90124979A
Other languages
German (de)
English (en)
Other versions
EP0434072A3 (en
Inventor
Harald Dr. Krzyminski
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0434072A2 publication Critical patent/EP0434072A2/fr
Publication of EP0434072A3 publication Critical patent/EP0434072A3/de
Withdrawn legal-status Critical Current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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/51—Marks on printed material for colour quality control

Definitions

  • the invention relates to a print control strip for multi-color autotypical offset printing according to the preamble of claim 1.
  • Print control strips of the type mentioned are known and have long been used in offset printing to optimize and control the quality of multicolored printed products.
  • Such pressure control strips consist of small control fields arranged in a row, which are generally arranged several times in succession in a recurring sequence (measuring field sequences).
  • a complete print control strip thus consists of several. normally identical sequences and extends across the entire width of the press sheet.
  • the sequences of the print control strip arranged one behind the other are opposed by a number of color zones in the printing units of a multi-color printing press, which also extend across the entire width of the printing cylinder.
  • the aim of dividing the sheet width of a printing press into relatively narrow color zones is to be able to set the color requirement depending on the color of the image to be printed in narrow zones.
  • these ink zones are between 30 and 45 mm wide and are equipped with a kind of slider with which the ink supply in each ink zone can be adjusted manually or via a remote motorized adjustment.
  • the ink supply is set separately for each color in each inking unit (in one of the usual four-color machines in four inking units arranged one after the other) and is carried out by the operator of the printing press.
  • the printer orients itself on densitometric measurement values, which are obtained with the aid of a color reflected light meter from the small, usually between 4 and 6 mm wide measuring fields of the print control strip.
  • the print control strip provides information about the color requirement and thus the necessary setting of the color zones assigned to it. A sequence therefore consists of several control fields.
  • the invention has for its object to improve a print control strip of the type mentioned in such a way that when measuring it without special additional display means from the print strip when measuring any control field sequence, the position of the respectively measured sequence is displayed automatically and automatically or as color dosing information for the associated control strip Color zones of the printing unit can be implemented.
  • the solution according to the invention therefore consists in changing the sequence of the measurement fields within a sequence according to a certain scheme, so that a pressure control strip is formed which consists of sequences which all differ from one another by a special sequence of their control fields.
  • Each sequence and its position within the print control strip can thus be individually recognized by the densitometer and assigned to those color zones that lie across the width of the measured sequence.
  • the densitometer display then not only shows the measurement values obtained from the sequence as before, but also the numbers of the color zones that correspond to the position of the sequence.
  • the numbers of the ink zone are also transmitted when the measurement data of the sequence are transferred to a computer, and the operator of the printing press receives the information together with the measurement data which ink zones are possibly to be changed. If the path of automatic correction of the color zones, which is not yet common but conceivable, is followed, the connection of the measurement data of the sequence with the assignment of the color zones provides the position size calculated and the motorized adjustment is automatically brought about.
  • a particular advantage of the solution according to the invention is that no additional control fields, for example in the manner of a bar code field, are necessary for the detection of the position of the measured sequence. Such additional detection fields would restrict the available length for the actual measuring fields, which is always tight. In addition, technical equipment requirements would have to be created, for example in the form of an additional reading unit for the numerical recognition of such fields. The solution according to the invention advantageously makes this additional technical effort unnecessary.
  • the measuring head and software of the densitometer must be designed in such a way that the individual measuring fields of the sequence are automatically recognized by color and type (solid color field or grid field) and thus differentiate from one another during the measuring process or immediately afterwards during the device-internal evaluation will. This is the necessary prerequisite for deciphering the color zone numbers coded in the sequence of the measuring fields.
  • the measuring heads of modern densitometers - for example according to the type of DE-OS 3 421 577 - are fundamentally suitable for this task because they have several photo elements equipped with suitable filters which enable automatic recognition of the process colors used in multicolor printing.
  • I is the printed sheet.
  • the fields II shown represent the images to be printed in color, and the arrow A indicates the direction of transport of the sheet I through the printing machine III.
  • IV is the print control strip
  • V denotes the individual measuring fields
  • VI represents a sequence - that is, the recurring sequence of certain measuring fields.
  • VII denotes the first inking unit of the printing press III, with each individual color of the multicolor print another inking system follows.
  • VIII represents the row of color zones, the slider of each color zone VIII, not unlike a water pipe, being turned up or down according to the color requirement. This scheme makes it clear that the slide position of the individual inking units VII must be adapted to the color requirements of the images in fields II.
  • FIG. 2 shows an exemplary embodiment of a pressure control strip IV, but the sixteen measuring field sequences VI are arranged one below the other in this figure for illustrative reasons.
  • a measurement sequence VI of the control strip IV is 65 mm long and thus extends over the width of two color zones IX.
  • the position detection of sequences VI is already possible after the first printed color, i.e. in the example after printing the color cyan.
  • the incident light densitometer only has to be programmed in such a way that it accepts the blank field, which has not yet been printed, and places it correctly instead of the full magenta area. This can be important if densitometric measurements are to be taken after the first color has been printed.
  • the print control strip IV in FIG. 1 is therefore also printed on the printed sheet I with each print and is therefore the result of a print control strip which is made available to the printer and which is required for the autotypical preparation of the printing plate in question.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP19900124979 1989-12-21 1990-12-20 Printing control strip Withdrawn EP0434072A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893942254 DE3942254A1 (de) 1989-12-21 1989-12-21 Druckkontrollstreifen
DE3942254 1989-12-21

Publications (2)

Publication Number Publication Date
EP0434072A2 true EP0434072A2 (fr) 1991-06-26
EP0434072A3 EP0434072A3 (en) 1991-10-30

Family

ID=6395992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900124979 Withdrawn EP0434072A3 (en) 1989-12-21 1990-12-20 Printing control strip

Country Status (2)

Country Link
EP (1) EP0434072A3 (fr)
DE (1) DE3942254A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590282A1 (fr) * 1992-09-28 1994-04-06 MAN Roland Druckmaschinen AG Barres de contrôle pour commander et surveiller le processus d'impression
EP1084843A1 (fr) * 1999-09-17 2001-03-21 MAN Roland Druckmaschinen AG Dispositif pour l'analyse densitométrique de produits imprimés
EP2439071A1 (fr) 2010-10-11 2012-04-11 KBA-NotaSys SA Motif de contrôle des couleurs pour la mesure optique de couleurs imprimées sur un substrat de type feuille ou toile à l'aide d'une presse d'impression multicolore et utilisations correspondantes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305968C2 (de) * 1993-02-26 1996-04-04 Techkon Elektronik Gmbh Handmeßgerät für Remissionsmessungen an farbigen Kontrollfeldern von Druckbogen
DE19939154A1 (de) * 1999-08-20 2001-04-12 Techkon Gmbh Verfahren und Meßvorrichtung zur Druckkontrolle und Bildanalyse
DE102005060893C5 (de) * 2005-12-20 2019-02-28 Manroland Goss Web Systems Gmbh Verfahren zur Ermittlung eines drucktechnischen Messwertes
DE102007025552B4 (de) 2007-05-31 2010-07-08 Techkon Gmbh Messsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2728738A1 (de) * 1977-06-25 1979-01-11 Roland Offsetmaschf Einrichtung zur kontrolle und regelung des druckvorgangs an druckmaschinen
EP0149424A2 (fr) * 1983-12-19 1985-07-24 GRETAG Aktiengesellschaft Procédé et dispositif pour le contrôle de la qualité d'impression et ruban test coloré pour ce contrôle
EP0255924A2 (fr) * 1986-08-05 1988-02-17 FOGRA Deutsche Forschungsgesellschaft für Druck- und Reproduktionstechnik e.V. Procédé et dispositif pour influencer l'encrage d'une surface encrée dans une machine à imprimer
EP0196431B1 (fr) * 1985-03-21 1992-11-11 Felix Brunner Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723701A1 (de) * 1987-07-17 1989-02-02 Krzyminski Harald Handmessgeraet zur optischen reflexionsmessung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2728738A1 (de) * 1977-06-25 1979-01-11 Roland Offsetmaschf Einrichtung zur kontrolle und regelung des druckvorgangs an druckmaschinen
EP0149424A2 (fr) * 1983-12-19 1985-07-24 GRETAG Aktiengesellschaft Procédé et dispositif pour le contrôle de la qualité d'impression et ruban test coloré pour ce contrôle
EP0196431B1 (fr) * 1985-03-21 1992-11-11 Felix Brunner Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure
EP0255924A2 (fr) * 1986-08-05 1988-02-17 FOGRA Deutsche Forschungsgesellschaft für Druck- und Reproduktionstechnik e.V. Procédé et dispositif pour influencer l'encrage d'une surface encrée dans une machine à imprimer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590282A1 (fr) * 1992-09-28 1994-04-06 MAN Roland Druckmaschinen AG Barres de contrôle pour commander et surveiller le processus d'impression
EP1084843A1 (fr) * 1999-09-17 2001-03-21 MAN Roland Druckmaschinen AG Dispositif pour l'analyse densitométrique de produits imprimés
EP2439071A1 (fr) 2010-10-11 2012-04-11 KBA-NotaSys SA Motif de contrôle des couleurs pour la mesure optique de couleurs imprimées sur un substrat de type feuille ou toile à l'aide d'une presse d'impression multicolore et utilisations correspondantes
WO2012049610A1 (fr) 2010-10-11 2012-04-19 Kba-Notasys Sa Motif de contrôle de couleur pour la mesure optique de couleurs imprimées sur une feuille ou un substrat en bande à l'aide d'une presse d'impression multicolore et ses utilisations

Also Published As

Publication number Publication date
DE3942254A1 (de) 1991-07-04
DE3942254C2 (fr) 1992-06-11
EP0434072A3 (en) 1991-10-30

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