GB980414A - Improvements in or relating to the etching of printing surfaces - Google Patents

Improvements in or relating to the etching of printing surfaces

Info

Publication number
GB980414A
GB980414A GB5864/62A GB586462A GB980414A GB 980414 A GB980414 A GB 980414A GB 5864/62 A GB5864/62 A GB 5864/62A GB 586462 A GB586462 A GB 586462A GB 980414 A GB980414 A GB 980414A
Authority
GB
United Kingdom
Prior art keywords
etching
patch
cylinder
control patch
relays
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
GB5864/62A
Inventor
John Fothergill Crosfield
Kenneth Bradley Morris
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.)
Crosfield Electronics Ltd
Original Assignee
Crosfield Electronics Ltd
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 Crosfield Electronics Ltd filed Critical Crosfield Electronics Ltd
Priority to GB5864/62A priority Critical patent/GB980414A/en
Priority to US257402A priority patent/US3300362A/en
Publication of GB980414A publication Critical patent/GB980414A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/08—Apparatus, e.g. for photomechanical printing surfaces
    • 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
    • G01B11/22—Measuring arrangements characterised by the use of optical techniques for measuring depth

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • ing And Chemical Polishing (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Abstract

980,414. Etching. CROSFIELD ELECTRONICS Ltd. Feb. 12, 1963 [Feb. 15, 1962], No. 5864/62. Heading B6J. A copper cylinder 1 to be etched to form a printing-surface thereon is covered with a gelatinous tissue which has been exposed through an original, developed and washed so as to constitute an etching resist varying in resistive strength according to the tone (i.e. depth of etching) required. The covered cylinder is rotated in a bath 3 of ferric chloride solution circulated from a sump 29 by a pump 30 and return pipe 31, distilled water for progressive dilution of the etchant, to increase the penetrating power thereof and enable it to etch areas protected by progressively harder resist, being supplied through a valve 18 operated by a switch 20 through a delay device 19. A circumferential strip of the cylinder including a control patch comprising a series of spaced bars 2 is scanned by a photo-cell 7, the output of which is passed through a frequency filter which passes only the signal resulting from scanning of the control patch to relays 9, 10. When etching has proceeded to the required depth, the patch 2 becomes sufficiently visible to cause the relays to be actuated. The relay 9 closes the valve 18, and the relay 10 after a delay opens a drain 12 to empty the sump and bath, and opens a valve 15 to rinse the cylinder with water from a spray pipe 13. In another form, the control patch is a solid dark circular area, and a white patch or a magnetic patch axially aligned with the control patch is sensed by a second device controlling a gating circuit to allow the signal from the photo-cell to pass to the relays only while the control patch is being scanned. An arrangement of lamps associated with diodes indicates the progress of the etching.
GB5864/62A 1962-02-15 1962-02-15 Improvements in or relating to the etching of printing surfaces Expired GB980414A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5864/62A GB980414A (en) 1962-02-15 1962-02-15 Improvements in or relating to the etching of printing surfaces
US257402A US3300362A (en) 1962-02-15 1963-02-11 Apparatus for etching of printing surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5864/62A GB980414A (en) 1962-02-15 1962-02-15 Improvements in or relating to the etching of printing surfaces

Publications (1)

Publication Number Publication Date
GB980414A true GB980414A (en) 1965-01-13

Family

ID=9804047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5864/62A Expired GB980414A (en) 1962-02-15 1962-02-15 Improvements in or relating to the etching of printing surfaces

Country Status (2)

Country Link
US (1) US3300362A (en)
GB (1) GB980414A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR86998E (en) * 1964-12-14 1966-05-20 D Editions Artistiques N E A S Improvements in chemical etching processes and devices
US3401068A (en) * 1965-02-15 1968-09-10 Chemcut Corp Method and apparatus for uniformly etching printed circuits by control of the conveyor speed
US3419446A (en) * 1965-02-15 1968-12-31 Chemcut Corp Method and means for continuous control of etching rate
US3503817A (en) * 1966-01-24 1970-03-31 Fmc Corp Process for controlling metal etching operation
US3388023A (en) * 1966-10-11 1968-06-11 Chemcut Corp Continuous etching machine having a controlled conveyor speed
US3475242A (en) * 1966-12-19 1969-10-28 Fmc Corp Process and apparatus for controlling metal etching operation
CA1050864A (en) * 1973-08-29 1979-03-20 James K. Anderson Apparatus for automatically processing photogravure curvilinear surfaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127267A (en) * 1964-03-31 Automatic photographic color printing
US2575546A (en) * 1948-07-24 1951-11-20 Machine for producing screened
GB812367A (en) * 1954-09-02 1959-04-22 North American Aviation Inc Improvements in or relating to device and method for monitoring chemical etching processes
US2885637A (en) * 1955-10-18 1959-05-05 North American Aviation Inc Continuous electronic etch depth indicator
US3121037A (en) * 1958-05-19 1964-02-11 Detrolt Gravure Corp Process and apparatus for preparing rotogravure plates

Also Published As

Publication number Publication date
US3300362A (en) 1967-01-24

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