FR1457309A - Electronic method and device for reproducing halftones on electrostencil - Google Patents

Electronic method and device for reproducing halftones on electrostencil

Info

Publication number
FR1457309A
FR1457309A FR16843A FR16843A FR1457309A FR 1457309 A FR1457309 A FR 1457309A FR 16843 A FR16843 A FR 16843A FR 16843 A FR16843 A FR 16843A FR 1457309 A FR1457309 A FR 1457309A
Authority
FR
France
Prior art keywords
electrostencil
electronic method
reproducing halftones
halftones
reproducing
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
FR16843A
Other languages
French (fr)
Inventor
Francois Valentin
Yves Basso
Charles Rongier
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.)
COLOS SOC
Original Assignee
COLOS SOC
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 COLOS SOC filed Critical COLOS SOC
Priority to FR16843A priority Critical patent/FR1457309A/en
Application granted granted Critical
Publication of FR1457309A publication Critical patent/FR1457309A/en
Priority to DK182266AA priority patent/DK118990B/en
Priority to US548306A priority patent/US3482039A/en
Priority to SE6478/66A priority patent/SE345622B/xx
Priority to DE1522539A priority patent/DE1522539C3/en
Priority to GB20836/66A priority patent/GB1150623A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • B41C1/141—Forme preparation for stencil-printing or silk-screen printing by cutting or perforation with mechanical means; Electrical spark cutting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Facsimile Scanning Arrangements (AREA)
FR16843A 1965-05-13 1965-05-13 Electronic method and device for reproducing halftones on electrostencil Expired FR1457309A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR16843A FR1457309A (en) 1965-05-13 1965-05-13 Electronic method and device for reproducing halftones on electrostencil
DK182266AA DK118990B (en) 1965-05-13 1966-04-06 Method and apparatus for making halftone stencils.
US548306A US3482039A (en) 1965-05-13 1966-05-06 Method and apparatus for producing a laminar printing form
SE6478/66A SE345622B (en) 1965-05-13 1966-05-11
DE1522539A DE1522539C3 (en) 1965-05-13 1966-05-11 Method and device for perforating stencils by spark discharge for the production of halftone prints from an original
GB20836/66A GB1150623A (en) 1965-05-13 1966-05-11 Improvements in and relating to a method and apparatus for the production of Grey-Tone Laminar Printing Forme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR16843A FR1457309A (en) 1965-05-13 1965-05-13 Electronic method and device for reproducing halftones on electrostencil

Publications (1)

Publication Number Publication Date
FR1457309A true FR1457309A (en) 1966-01-24

Family

ID=8578619

Family Applications (1)

Application Number Title Priority Date Filing Date
FR16843A Expired FR1457309A (en) 1965-05-13 1965-05-13 Electronic method and device for reproducing halftones on electrostencil

Country Status (6)

Country Link
US (1) US3482039A (en)
DE (1) DE1522539C3 (en)
DK (1) DK118990B (en)
FR (1) FR1457309A (en)
GB (1) GB1150623A (en)
SE (1) SE345622B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912596A1 (en) * 1968-03-14 1969-10-09 Zeuthen & Aagaard As Device for electrically perforating a die
FR2216738A1 (en) * 1973-02-05 1974-08-30 Muirhead Inc

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629496A (en) * 1969-12-30 1971-12-21 Litton Systems Inc Encoding of picture signals in photofacsimile
DE2020639A1 (en) * 1970-04-28 1971-11-18 Bosch Elektronik Gmbh Method for the electrical transmission of original images
US3694570A (en) * 1970-07-22 1972-09-26 Evgeny Pavlovich Kotov Automatic engraving machine
US3801738A (en) * 1972-07-05 1974-04-02 Instr Corp Electronic stencil cutter with cutting signal pulse width inversely proportional to the original intensity
GB1448112A (en) * 1973-02-13 1976-09-02 Int Publishing Corp Ltd Electronic screening
US4106061A (en) * 1977-03-03 1978-08-08 The Mead Corporation Density control for ink jet copier
NL8403926A (en) * 1984-12-24 1986-07-16 Oce Nederland Bv METHOD FOR EXPOSING A PHOTOSENSITIVE LAYER AND EXPOSURE DEVICE.
FR2596226B1 (en) * 1986-03-19 1988-12-02 Vignon Bernard METHOD FOR REPRODUCING AN IMAGE FROM THE DIGITIZATION OF THIS IMAGE
DE69030252T2 (en) * 1990-01-04 1997-09-04 Eastman Kodak Co STROKE-FREE PRINTER AND GRAY VALUE RECORDING METHOD

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777058A (en) * 1951-09-28 1957-01-08 Fairchild Camera Instr Co Video-signal tone-adjusting network
US2881246A (en) * 1955-09-27 1959-04-07 Fairchild Camera Instr Co Engraving machine
NL254939A (en) * 1959-08-17
US3393269A (en) * 1964-04-22 1968-07-16 Zeuthen & Aagaard As Method and apparatus for producing a laminar printing forme

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912596A1 (en) * 1968-03-14 1969-10-09 Zeuthen & Aagaard As Device for electrically perforating a die
FR2216738A1 (en) * 1973-02-05 1974-08-30 Muirhead Inc

Also Published As

Publication number Publication date
DE1522539C3 (en) 1978-05-24
SE345622B (en) 1972-06-05
DE1522539A1 (en) 1969-09-11
DK118990B (en) 1970-10-26
DE1522539B2 (en) 1977-09-22
US3482039A (en) 1969-12-02
GB1150623A (en) 1969-04-30

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