EP0264562B1 - Dispositif pour la lecture densitométrique d'un ruban de mesure dans les machines d'impression - Google Patents

Dispositif pour la lecture densitométrique d'un ruban de mesure dans les machines d'impression Download PDF

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Publication number
EP0264562B1
EP0264562B1 EP87111628A EP87111628A EP0264562B1 EP 0264562 B1 EP0264562 B1 EP 0264562B1 EP 87111628 A EP87111628 A EP 87111628A EP 87111628 A EP87111628 A EP 87111628A EP 0264562 B1 EP0264562 B1 EP 0264562B1
Authority
EP
European Patent Office
Prior art keywords
measuring
density
receivers
measured
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.)
Expired - Lifetime
Application number
EP87111628A
Other languages
German (de)
English (en)
Other versions
EP0264562A2 (fr
EP0264562A3 (en
Inventor
Claus Dipl.-Ing. Simeth
Peter Dipl.-Ing. Schramm
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
Priority to AT87111628T priority Critical patent/ATE63858T1/de
Publication of EP0264562A2 publication Critical patent/EP0264562A2/fr
Publication of EP0264562A3 publication Critical patent/EP0264562A3/de
Application granted granted Critical
Publication of EP0264562B1 publication Critical patent/EP0264562B1/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
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

Definitions

  • the invention relates to a device on printing machines for the densitometric detection of a measuring field strip printed on a bridge arch, which can be scanned by means of a multiple reading head moved in a guide along a length of the measuring field strip.
  • EP-OS 149 424 Devices of this type are known from EP-OS 149 424. This disclosure also describes how to print an information code alongside the measuring field strip in order to find the suitable measuring position precisely. In addition to the effort, there is the disadvantage that even more space is required on the printed sheet, which further reduces the achievable benefits.
  • the object of the invention is to carry out a densitometric detection of a measuring field strip even when the measuring field strip and the density measuring head travel direction are not exactly parallel.
  • the color measuring system consists of a measuring table 1, on which a density measuring head 2 travels along a suction bar 3.
  • the suction bar 3 holds the sheet 4 placed on the measuring table 1 with the measuring field strip 5 printed thereon in its position.
  • the printed sheet 4 is placed on the table 1 so that the measuring spot 6 (FIG. 2) acted upon by the density measuring head 2 lies exactly on the measuring field strip 5 during traversing.
  • the density measuring head 2 contains eight transducers 7. These are arranged next to one another transversely to the measuring field strip 5, accordingly eight measuring spots 8 to 15 extend transversely. According to the assignment in FIG. 3, the measuring spot 8, 9 have minimal density values on, as well as at the measurement spot 14, 15, whereas the measurement spots 11, 12 and 13 will generate maximum density values and a density value between the measurement spot 10 will be measured.
  • two maximum values are selected by comparing in a comparator circuit 16 and added up in an evaluation circuit 17 and output to a display 18.
  • a signal for stopping the drive 19 of the density measuring head 2 or for indicating 20 an incorrect measurement can also be output. The latter occurs when a high density value is already determined on an edge measurement spot 8, 15.
  • FIG. 4 shows transducers 7 arranged next to one another in a density measuring head 2 with corresponding light sources 24.
  • Each transducer 7 has, according to FIG. 5, diaphragms 21, a photo element 22 and an electronic circuit 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (3)

  1. Dispositif pour machines imprimantes pour la lecture densitométrique d'une bande de mesure, imprimée sur une feuille d'impression, qui peut être explorée au moyen d'une tête de lecture multiple (2) mobile dans un guide le long de la bande de mesure (5),
    caractérisé en ce que, sur la tête de lecture multiple (2), sont prévus l'un à côté de l'autre une pluralité de capteurs (7) de valeurs de mesures densitométriques, agencés transversalement à la bande de mesure (5), en ce qu'un comparateur (16) est prévu, auquel peuvent être amenées les valeurs densitométriques mesurées dans les capteurs individuels (7), grâce à quoi les valeurs densitométriques les plus élevées, représentant la position de la tête de lecture multiple (2) par rapport à la bande de mesure, peuvent être déterminées dans un circuit d'exploitation (17) disposé en aval, et un signal pour la commande d'un affichage (18,20) et/ou du moteur d'entraînement (19) de la tête de lecture multiple (2) peut être initié.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que les val eurs de mesures densitométriques les plus élevées, déterminées par les capteurs (7), choisies et moyennées, sont délivrées à l'affichage.
  3. Dispositif selon la revendication 1,
    caractérisé en ce que les valeurs de mesure s'écartant de la valeur la plus élevée déterminée d'une différence fixée sont éliminées lors de l'exploitation desdites valeurs.
EP87111628A 1986-09-13 1987-08-11 Dispositif pour la lecture densitométrique d'un ruban de mesure dans les machines d'impression Expired - Lifetime EP0264562B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111628T ATE63858T1 (de) 1986-09-13 1987-08-11 Vorrichtung an druckmaschinen zur densitometrischen erfassung eines messfeldstreifens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3631204A DE3631204C2 (de) 1986-09-13 1986-09-13 Vorrichtung an Druckmaschinen zur densitometrischen Erfassung eines Meßfeldstreifens
DE3631204 1986-09-13

Publications (3)

Publication Number Publication Date
EP0264562A2 EP0264562A2 (fr) 1988-04-27
EP0264562A3 EP0264562A3 (en) 1988-12-21
EP0264562B1 true EP0264562B1 (fr) 1991-05-29

Family

ID=6309523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111628A Expired - Lifetime EP0264562B1 (fr) 1986-09-13 1987-08-11 Dispositif pour la lecture densitométrique d'un ruban de mesure dans les machines d'impression

Country Status (5)

Country Link
US (1) US4806002A (fr)
EP (1) EP0264562B1 (fr)
JP (1) JPH0627704B2 (fr)
AT (1) ATE63858T1 (fr)
DE (2) DE3631204C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6707554B1 (en) 1998-09-29 2004-03-16 Roche Diagnostics Gmbh Method for the photometric analysis of test elements

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738850A1 (de) * 1987-11-16 1989-05-24 Roland Man Druckmasch Verfahren zur automatischen positionsfindung von druckkontrollstreifen fuer automatisch messende farbdichtemessanlagen
US5078497A (en) * 1989-08-25 1992-01-07 Xerox Corporation Densitometer for a liquid developer material
US5119132A (en) * 1990-10-24 1992-06-02 Xerox Corporation Densitometer and circuitry with improved measuring capabilities of marking particle density on a photoreceptor
DE29721199U1 (de) * 1997-11-29 1998-01-29 Man Roland Druckmaschinen Ag, 63069 Offenbach Meßsystem
US6847451B2 (en) * 2002-05-01 2005-01-25 Lifescan, Inc. Apparatuses and methods for analyte concentration determination
US7636163B2 (en) * 2007-07-23 2009-12-22 X-Rite, Inc. Color measurement device with error detection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567923A (en) * 1968-04-03 1971-03-02 Hurlectron Inc System for monitoring and controlling the color density of ink during printing
US3756725A (en) * 1970-10-12 1973-09-04 Harris Intertype Corp Measurement and control of ink density
JPS498312A (fr) * 1972-05-13 1974-01-24
US3995958A (en) * 1975-07-21 1976-12-07 Hallmark Cards, Incorporated Automatic densitometer and method of color control in multi-color printing
US4237616A (en) * 1978-10-13 1980-12-09 Tobias Philip E Scanning path alignment arrangement
DD158758A1 (de) * 1981-05-04 1983-02-02 Eva Luebbe Einrichtung zur erfassung und auswertung der zonalen farbdichte von bedruckstoffen
US4512662A (en) * 1981-07-06 1985-04-23 Tobias Philip E Plate scanner for printing plates
ATE26674T1 (de) * 1983-01-29 1987-05-15 Roland Man Druckmasch Vorrichtung zum ermitteln und auswerten von farbmessfeldern auf einem druckbogen.
DE3465930D1 (en) * 1983-11-04 1987-10-15 Gretag Ag Method and device for controlling the ink supply in an offset printing machine, and offset printing machine provided with such a device
DE3483606D1 (de) * 1983-12-19 1990-12-20 Gretag Ag Verfahren, vorrichtung und farbmessstreifen fuer die druckqualitaetsbeurteilung.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6707554B1 (en) 1998-09-29 2004-03-16 Roche Diagnostics Gmbh Method for the photometric analysis of test elements

Also Published As

Publication number Publication date
EP0264562A2 (fr) 1988-04-27
DE3631204A1 (de) 1988-03-24
EP0264562A3 (en) 1988-12-21
DE3631204C2 (de) 1993-11-25
DE3770403D1 (de) 1991-07-04
JPH0627704B2 (ja) 1994-04-13
JPS6371638A (ja) 1988-04-01
US4806002A (en) 1989-02-21
ATE63858T1 (de) 1991-06-15

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