ES457774A1 - Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves - Google Patents

Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves

Info

Publication number
ES457774A1
ES457774A1 ES457774A ES457774A ES457774A1 ES 457774 A1 ES457774 A1 ES 457774A1 ES 457774 A ES457774 A ES 457774A ES 457774 A ES457774 A ES 457774A ES 457774 A1 ES457774 A1 ES 457774A1
Authority
ES
Spain
Prior art keywords
ink
control
printing press
sensor measuring
density
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
Application number
ES457774A
Other languages
Spanish (es)
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.)
Salvat Editores SA
Original Assignee
Salvat Editores SA
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 Salvat Editores SA filed Critical Salvat Editores SA
Priority to ES457774A priority Critical patent/ES457774A1/en
Priority to DE19772730421 priority patent/DE2730421A1/en
Publication of ES457774A1 publication Critical patent/ES457774A1/en
Expired 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
    • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply

Abstract

Printing ink application control for printing machine has a metering sensing element comprising a phototransistor which undertakes three measurements on the surface of the printed sheet as it passes of which the first measurement is undertaken in the absence of light while the others are conducted with light employing th transparency of the paper. The ink density is compared with a predetermined value held in the computer of a microprocessor which receives the measurements from the elements via an analogue/digital signal and generates a signal for controlling the current supply to several servo-motors which regulate the individual ink circulation control valves.
ES457774A 1977-04-13 1977-04-13 Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves Expired ES457774A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES457774A ES457774A1 (en) 1977-04-13 1977-04-13 Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves
DE19772730421 DE2730421A1 (en) 1977-04-13 1977-07-06 Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES457774A ES457774A1 (en) 1977-04-13 1977-04-13 Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves

Publications (1)

Publication Number Publication Date
ES457774A1 true ES457774A1 (en) 1978-02-16

Family

ID=8473541

Family Applications (1)

Application Number Title Priority Date Filing Date
ES457774A Expired ES457774A1 (en) 1977-04-13 1977-04-13 Ink application control for printing press - has phototransistor sensor measuring ink density to control ink circulation valves

Country Status (2)

Country Link
DE (1) DE2730421A1 (en)
ES (1) ES457774A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127381A1 (en) * 1981-07-10 1983-01-27 Salvat Editores, S.A., Barcelona MEASURING INSTRUMENTS FOR CLOSED WORKING SYSTEMS FOR MONITORING AND CORRECTING PRINTING ON OFFSET PRINTING MACHINES
US4545031A (en) * 1981-09-17 1985-10-01 Kita Electrics Co., Ltd. Photo-electric apparatus for monitoring printed papers
DE3148076A1 (en) * 1981-12-04 1983-06-09 Salvat Editores, S.A., Barcelona Arrangement for measuring and controlling the ink density of a print
DE3220803C2 (en) * 1982-06-03 1994-03-10 Heidelberger Druckmasch Ag Color density measuring system for determining the color density values of printed products

Also Published As

Publication number Publication date
DE2730421A1 (en) 1978-10-26

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19980202