EP0264562A3 - Device for detecting by densitometry a measuring strip in printing machines - Google Patents

Device for detecting by densitometry a measuring strip in printing machines Download PDF

Info

Publication number
EP0264562A3
EP0264562A3 EP87111628A EP87111628A EP0264562A3 EP 0264562 A3 EP0264562 A3 EP 0264562A3 EP 87111628 A EP87111628 A EP 87111628A EP 87111628 A EP87111628 A EP 87111628A EP 0264562 A3 EP0264562 A3 EP 0264562A3
Authority
EP
European Patent Office
Prior art keywords
density
receivers
test strip
measuring head
densitometry
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.)
Granted
Application number
EP87111628A
Other languages
German (de)
Other versions
EP0264562B1 (en
EP0264562A2 (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/en
Publication of EP0264562A2 publication Critical patent/EP0264562A2/en
Publication of EP0264562A3 publication Critical patent/EP0264562A3/en
Application granted granted Critical
Publication of EP0264562B1 publication Critical patent/EP0264562B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

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)

Abstract

A densitometric sensing device in which a density measuring head, which is part of the device, traverses an ink test strip printed on a page which is fed to or placed on the device. The problem of misalignment between the thus-placed ink test strip and the scanning direction of the density measuring head is avoided by providing a plurality of density measuring receivers in the measuring head, mounted transverse to the direction of travel so that the ink test strip is always under some of the receivers. The measured density values of all of the receivers are passed to a comparison circuit which cooperates with a logic circuit to determine from the values of the signals themselves which should be used to produce a composite density value, which is then used as the density for the zone being scanned.
EP87111628A 1986-09-13 1987-08-11 Device for detecting by densitometry a measuring strip in printing machines Expired - Lifetime EP0264562B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111628T ATE63858T1 (en) 1986-09-13 1987-08-11 DEVICE ON PRINTING MACHINES FOR DENSITOMETRIC DETECTION OF A MEASURING STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3631204A DE3631204C2 (en) 1986-09-13 1986-09-13 Device on printing press for densitometric detection of a measuring field strip
DE3631204 1986-09-13

Publications (3)

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

Family

ID=6309523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111628A Expired - Lifetime EP0264562B1 (en) 1986-09-13 1987-08-11 Device for detecting by densitometry a measuring strip in printing machines

Country Status (5)

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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738850A1 (en) * 1987-11-16 1989-05-24 Roland Man Druckmasch METHOD FOR THE AUTOMATIC POSITION DETECTION OF PRINT CONTROL STRIPS FOR AUTOMATICALLY MEASURING COLOR DENSITY MEASUREMENT SYSTEMS
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 (en) * 1997-11-29 1998-01-29 Man Roland Druckmaschinen Ag, 63069 Offenbach Measuring system
DE19844500A1 (en) 1998-09-29 2000-03-30 Roche Diagnostics Gmbh Process for the photometric evaluation of test elements
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237616A (en) * 1978-10-13 1980-12-09 Tobias Philip E Scanning path alignment arrangement

Family Cites Families (9)

* 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 (en) * 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
DD158758A1 (en) * 1981-05-04 1983-02-02 Eva Luebbe DEVICE FOR DETECTING AND EVALUATING THE ZONAL COLOR DENSITY OF PRINTING MATERIALS
US4512662A (en) * 1981-07-06 1985-04-23 Tobias Philip E Plate scanner for printing plates
EP0114914B1 (en) * 1983-01-29 1987-04-22 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Device for detecting and evaluating colour control strips on a printing sheet
US4660159A (en) * 1983-11-04 1987-04-21 Gretag Aktiengesellschaft Process and apparatus for the regulation of ink feed controls in an offset printing machine
ATE58336T1 (en) * 1983-12-19 1990-11-15 Gretag Ag METHOD, DEVICE AND COLOR STRIPS FOR ASSESSING PRINT QUALITY.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237616A (en) * 1978-10-13 1980-12-09 Tobias Philip E Scanning path alignment arrangement

Also Published As

Publication number Publication date
EP0264562B1 (en) 1991-05-29
DE3631204C2 (en) 1993-11-25
DE3770403D1 (en) 1991-07-04
US4806002A (en) 1989-02-21
JPH0627704B2 (en) 1994-04-13
DE3631204A1 (en) 1988-03-24
EP0264562A2 (en) 1988-04-27
ATE63858T1 (en) 1991-06-15
JPS6371638A (en) 1988-04-01

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