WO1987006724A3 - Half-tone screen printing forms with screen-elements arranged in honeycomb fashion - Google Patents

Half-tone screen printing forms with screen-elements arranged in honeycomb fashion Download PDF

Info

Publication number
WO1987006724A3
WO1987006724A3 PCT/DE1987/000191 DE8700191W WO8706724A3 WO 1987006724 A3 WO1987006724 A3 WO 1987006724A3 DE 8700191 W DE8700191 W DE 8700191W WO 8706724 A3 WO8706724 A3 WO 8706724A3
Authority
WO
WIPO (PCT)
Prior art keywords
printing
screen
printing forms
screen elements
tone
Prior art date
Application number
PCT/DE1987/000191
Other languages
German (de)
French (fr)
Other versions
WO1987006724A2 (en
Inventor
Ernst Schumacher
Original Assignee
Schumacher Kg
Ernst Schumacher
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 Schumacher Kg, Ernst Schumacher filed Critical Schumacher Kg
Publication of WO1987006724A2 publication Critical patent/WO1987006724A2/en
Priority to DK650287A priority Critical patent/DK650287A/en
Publication of WO1987006724A3 publication Critical patent/WO1987006724A3/en

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
    • G03F5/02—Screening processes; Screens therefor by projection methods
    • G03F5/12—Screening processes; Screens therefor by projection methods using other screens, e.g. granulated screen
    • 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

Abstract

The invention described comprises an optical screen with which the required copies can be produced by using the photomechanical process of printing form production. Printing forms of the type forming the subject of the invention can be used advantageously for all printing processes since the printing or non-printing surface components of the screen elements, which are of various sizes depending on the tone value, are designed with differing geometrical shapes which are specific both for the printing process and also for the tone value to be reproduced. In letterpress and offset printing, the printing forms according to the invention enable a very uniform progression of the overall tone scale; this effect is due in particular to the fact that the transition from connected to unconnected printing screen elements is achieved by a structure of escutcheon-like screen elements which is characteristic of the invention. In addition, the highlights are effectively emphasized by a deliberate reduction in dot frequency in the high-light zones. With the letterpress printing forms according to the invention the ratio of dips to land is improved; the land is stabilized.
PCT/DE1987/000191 1986-04-30 1987-04-29 Half-tone screen printing forms with screen-elements arranged in honeycomb fashion WO1987006724A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK650287A DK650287A (en) 1986-04-30 1987-12-10 HALF TONE RASTER PRINT FORMS WITH BASKET STRUCTURE ELEMENTS

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP3614749.4 1986-04-30
DE3614749 1986-04-30
DEP3711838.2 1987-04-08
DE19873711838 DE3711838A1 (en) 1986-04-30 1987-04-08 AUTOTYPICAL SCREENED PRINTING FORMS WITH HONEYCOMBED GRID ELEMENTS

Publications (2)

Publication Number Publication Date
WO1987006724A2 WO1987006724A2 (en) 1987-11-05
WO1987006724A3 true WO1987006724A3 (en) 1988-01-14

Family

ID=25843384

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1987/000191 WO1987006724A2 (en) 1986-04-30 1987-04-29 Half-tone screen printing forms with screen-elements arranged in honeycomb fashion

Country Status (5)

Country Link
EP (1) EP0302870A1 (en)
JP (1) JPH01502455A (en)
AU (1) AU7305887A (en)
DE (1) DE3711838A1 (en)
WO (1) WO1987006724A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4339281C2 (en) * 1993-11-18 2003-10-30 Heidelberger Druckmasch Ag Process for optimizing the reproduction of an original image
DE19929902A1 (en) * 1999-06-29 2001-01-04 Sandy Screen Ag Zug Form of a printing element in the offset printing process
DE19929904A1 (en) * 1999-06-29 2001-01-04 Sandy Screen Ag Zug Form of a printing element in the offset printing process
DE19929901A1 (en) * 1999-06-29 2001-01-04 Sandy Screen Ag Zug Form of a printing element in the offset printing process
EP1719633B2 (en) * 2005-05-03 2014-03-12 Merck Patent GmbH Use of laser-engraved printing formes.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666479A (en) * 1967-01-03 1972-05-30 Raymond H Wiese Print containing different numbers of dots in light and dark tonal areas
FR2406840A1 (en) * 1977-10-19 1979-05-18 Braun Sa Imprimerie Editions NEW PROCESS FOR PREPARING PRINTING CLICHES IN PARTICULAR FOR HELIOGRAVURE
DE3220711A1 (en) * 1982-06-02 1983-12-22 Schumacher Kg, 6000 Frankfurt Set of printing formes for halftone colour image printing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666479A (en) * 1967-01-03 1972-05-30 Raymond H Wiese Print containing different numbers of dots in light and dark tonal areas
FR2406840A1 (en) * 1977-10-19 1979-05-18 Braun Sa Imprimerie Editions NEW PROCESS FOR PREPARING PRINTING CLICHES IN PARTICULAR FOR HELIOGRAVURE
DE3220711A1 (en) * 1982-06-02 1983-12-22 Schumacher Kg, 6000 Frankfurt Set of printing formes for halftone colour image printing

Also Published As

Publication number Publication date
DE3711838A1 (en) 1987-11-05
JPH01502455A (en) 1989-08-24
DE3711838C2 (en) 1988-02-11
AU7305887A (en) 1987-11-24
WO1987006724A2 (en) 1987-11-05
EP0302870A1 (en) 1989-02-15

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