GB1140107A - Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press - Google Patents

Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press

Info

Publication number
GB1140107A
GB1140107A GB3140266A GB3140266A GB1140107A GB 1140107 A GB1140107 A GB 1140107A GB 3140266 A GB3140266 A GB 3140266A GB 3140266 A GB3140266 A GB 3140266A GB 1140107 A GB1140107 A GB 1140107A
Authority
GB
United Kingdom
Prior art keywords
roller
thickness
bridge
ink film
meter
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
GB3140266A
Inventor
John Michael Adams
David Michael Heasman
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.)
Research Association for the Paper and Board Printing and Packaging Industries
Original Assignee
Research Association for the Paper and Board Printing and Packaging Industries
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 Research Association for the Paper and Board Printing and Packaging Industries filed Critical Research Association for the Paper and Board Printing and Packaging Industries
Priority to GB3140266A priority Critical patent/GB1140107A/en
Publication of GB1140107A publication Critical patent/GB1140107A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
    • G01B11/0625—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating with measurement of absorption or reflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0063—Devices for measuring the thickness of liquid films on rollers or cylinders

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1,140,107. Inking apparatus. RESEARCH ASSOCIATION FOR THE PAPER & BOARD, PRINTING & PACKAGING INDUSTRIES. 12 June, 1967 [13 July, 1966], No. 31402/66. Heading B6C. [Also in Divisions G1 and G3] Changes in the thickness of an ink film on the roller system of a printing press are detected by using a transparent roller 1, rotating in contact with one of the rollers 7 of the press inking system, to pick up an ink film therefrom, and photo-electrically measuring the thickness of this picked-up film. A photo-conductive cell 16 mounted inside the roller 1 receives light from a lamp 17 through the surface of the roller. The light is attenuated in accordance with the thickness of the ink film, which is directly dependent on the film thickness on roller 7. The cell 16 is connected in a Wheatstone bridge circuit, Fig. 2 (not shown) with a balancing photoconductive cell 19 which receives light direct from lamp 17 and thus monitors changes in the lamp intensity. A microammeter (37) senses out-of-balance current in the bridge circuit and has a shunt capacitor to damp the meter and keep its response time longer than one revolution of the roller 1. This prevents marks on the roller surface from causing a meter response. A potentiometric recorder (41) may be used to record variations in the bridge current with time. In setting up the apparatus, the press is run until the ink film thickness on rollers 7, 9 is correct, as judged from visual examination of prints taken. The bridge is then balanced to zero the meter by adjustment of a diaphragm 20 in front of cell 19. Any out-of-balance thereafter results from deviations from the correct film thickness and a warning light or audible alarm may be incorporated in the circuit to indicate such deviations. The ink flow from the duct may be controlled using the bridge output. A number of cells 16 or pairs of cells 16, 19 may be mounted along the axis inside the roller 1 and a long tubular lamp 17 used for illumination, respective bridge and meter channels and a multi-channel recorder being provided.
GB3140266A 1966-07-13 1966-07-13 Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press Expired GB1140107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3140266A GB1140107A (en) 1966-07-13 1966-07-13 Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3140266A GB1140107A (en) 1966-07-13 1966-07-13 Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press

Publications (1)

Publication Number Publication Date
GB1140107A true GB1140107A (en) 1969-01-15

Family

ID=10322561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3140266A Expired GB1140107A (en) 1966-07-13 1966-07-13 Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press

Country Status (1)

Country Link
GB (1) GB1140107A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707123A (en) * 1969-11-14 1972-12-26 Paper Board Printing Res Ass Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press
US3981619A (en) * 1972-11-09 1976-09-21 Mitter & Co. Control device for controlling the level of a liquid in a container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707123A (en) * 1969-11-14 1972-12-26 Paper Board Printing Res Ass Apparatus for detecting changes in the thickness of an ink film on the roller system of a printing press
US3981619A (en) * 1972-11-09 1976-09-21 Mitter & Co. Control device for controlling the level of a liquid in a container

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