FR2440019A1 - Procede helio-btnc - Google Patents

Procede helio-btnc

Info

Publication number
FR2440019A1
FR2440019A1 FR7830034A FR7830034A FR2440019A1 FR 2440019 A1 FR2440019 A1 FR 2440019A1 FR 7830034 A FR7830034 A FR 7830034A FR 7830034 A FR7830034 A FR 7830034A FR 2440019 A1 FR2440019 A1 FR 2440019A1
Authority
FR
France
Prior art keywords
documents
printing process
scanning system
half tone
screen
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
FR7830034A
Other languages
English (en)
Other versions
FR2440019B1 (fr
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.)
PERQUIS PIERRE CLAUDE
Original Assignee
PERQUIS PIERRE CLAUDE
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 PERQUIS PIERRE CLAUDE filed Critical PERQUIS PIERRE CLAUDE
Priority to FR7830034A priority Critical patent/FR2440019A1/fr
Publication of FR2440019A1 publication Critical patent/FR2440019A1/fr
Application granted granted Critical
Publication of FR2440019B1 publication Critical patent/FR2440019B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F5/00—Screening processes; Screens therefor
    • G03F5/20—Screening processes; Screens therefor using screens for gravure printing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)

Abstract

NOUVEAU PROCEDE DE REPRODUCTION, POUR LA REALISATION INDUSTRIELLE D'UN POSITIF TRAME A SURFACE DE POINTS DEGRADES EN CONTINU ET A DENSITES OPTIQUES VARIABLES POUR L'HELIOGRAVURE. LE POSITIF TRAME A DENSITES VARIABLES EST REALISE A PARTIR D'UNE SELECTION EN DEMI-TONS OBTENUE PAR LES METHODES CONVENTIONNELLES, PHOTOGRAPHIQUES OU PAR SCANNER, CONSTITUANT UNE BASE DE DEPART POUR EFFECTUER EN LABORATOIRE DEUX NEGATIFS DONT L'UN EST TRAME ET L'AUTRE EN DEMI-TONS, OU A PARTIR D'UNE SELECTION DIRECTE DES DEUX NEGATIFS, QUI SUPERPOSES RESTITUENT SUR UN SEUL FILM POSITIF LA STRUCTURE DE TRAME HELIO DEGRADEE EN CONTINU AVEC DES DENSITES VARIABLES. LE PROCEDE EST DESTINE A LA PREPARATION DES SELECTIONS POSITIVES POUR LA REPRODUCTION DES IMPRIMES EN HELIOGRAVURE CONVENTIONNELLE, PERMETTANT LA GRAVURE DE CYLINDRES POSSEDANT DES ALVEOLES AVEC DES SURFACES ET DES CREUX VARIABLES EN CONTINU.
FR7830034A 1978-10-23 1978-10-23 Procede helio-btnc Granted FR2440019A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7830034A FR2440019A1 (fr) 1978-10-23 1978-10-23 Procede helio-btnc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7830034A FR2440019A1 (fr) 1978-10-23 1978-10-23 Procede helio-btnc

Publications (2)

Publication Number Publication Date
FR2440019A1 true FR2440019A1 (fr) 1980-05-23
FR2440019B1 FR2440019B1 (fr) 1982-06-04

Family

ID=9214028

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7830034A Granted FR2440019A1 (fr) 1978-10-23 1978-10-23 Procede helio-btnc

Country Status (1)

Country Link
FR (1) FR2440019A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901468A (en) * 1931-07-13 1933-03-14 Axel A Pearson Method of producing photogravure plates
FR913534A (fr) * 1943-11-19 1946-09-12 Rinco A G Procédé de préparation de diapositives tramées
FR1274977A (fr) * 1960-09-19 1961-11-03 Victor Michel Fils De Procédé pour l'obtention des positifs tramés utilisés en héliogravure et rotogravure pour la confection des planches et cylindres d'impression
US4012257A (en) * 1974-10-21 1977-03-15 Geris Frank T Method of producing a gravure printing surface utilizing a continuous and screened negative

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901468A (en) * 1931-07-13 1933-03-14 Axel A Pearson Method of producing photogravure plates
FR913534A (fr) * 1943-11-19 1946-09-12 Rinco A G Procédé de préparation de diapositives tramées
FR1274977A (fr) * 1960-09-19 1961-11-03 Victor Michel Fils De Procédé pour l'obtention des positifs tramés utilisés en héliogravure et rotogravure pour la confection des planches et cylindres d'impression
US4012257A (en) * 1974-10-21 1977-03-15 Geris Frank T Method of producing a gravure printing surface utilizing a continuous and screened negative

Also Published As

Publication number Publication date
FR2440019B1 (fr) 1982-06-04

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Legal Events

Date Code Title Description
ST Notification of lapse