EP0836951B1 - Plaque d'impression pour l'impression rotative en relief - Google Patents

Plaque d'impression pour l'impression rotative en relief Download PDF

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Publication number
EP0836951B1
EP0836951B1 EP97203102A EP97203102A EP0836951B1 EP 0836951 B1 EP0836951 B1 EP 0836951B1 EP 97203102 A EP97203102 A EP 97203102A EP 97203102 A EP97203102 A EP 97203102A EP 0836951 B1 EP0836951 B1 EP 0836951B1
Authority
EP
European Patent Office
Prior art keywords
printing
pressure
dots
printing form
pressure points
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 - Lifetime
Application number
EP97203102A
Other languages
German (de)
English (en)
Other versions
EP0836951A3 (fr
EP0836951A2 (fr
Inventor
Joachim Dr. Opitz
Ralf Dr. Raue
Jürgen Reck
Christoph Prof. Dr.-Ing. Hars
Joachim Sonnenschein
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Corporate Intellectual Property GmbH
Koninklijke Philips Electronics NV
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 Philips Corporate Intellectual Property GmbH, Koninklijke Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP0836951A2 publication Critical patent/EP0836951A2/fr
Publication of EP0836951A3 publication Critical patent/EP0836951A3/fr
Application granted granted Critical
Publication of EP0836951B1 publication Critical patent/EP0836951B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing

Definitions

  • the invention relates to a printing form for a rotary high-pressure process, at of the printing dots transferring the printing ink form a basic grid and of are superimposed on a superstructure formed by depressions.
  • the ink is transferred to the Printing material directly through the printing form.
  • This is called the pressure plate manufactured and clamped on the surface of a plate cylinder.
  • the Printing on a print motif or print image is used to generate so-called semitones in the form of an i.a. regular print grid, whose Raised pressure points form flat pressure areas, which can be adjusted by a suitable Facility to be colored and from which the printing ink on the substrate is transmitted.
  • a printing form mentioned at the outset is known from DE-C1-43 24 577.
  • the Fine grid the basic grid there in the form of depressions as a superstructure is superimposed, it allows z.
  • Both the basic grid as the fine grid is also determined by the so-called grid number, by the number the pressure lines or pressure points per cm, calculated in the direction of the shortest distance is given, and the percentage area coverage clearly established. Because the individual printing areas or printing dots are arranged in lines are usually referred to as lines per cm. The grid number therefore gives the Division or the point spacing.
  • the point size is determined by the percentage Coverage set.
  • the percentage area coverage is the ratio of Area of the raised pressure points to the total area of the screened Print motif.
  • the pressure points do not need to be circular, but rather can basically have any geometric shape.
  • the invention is therefore based on the object, a printing form of the beginning mentioned type to achieve an improved print image.
  • the invention is based on the knowledge that when selecting one Do not overstructure the position and size of the pressure points forming the basic grid may be disregarded.
  • the superstructure must be relative to the pressure points be arranged in the same way, i.e. that each superstructure is relative to that of it superimposed pressure point has the same position.
  • the one pressure point superimposed superstructure may also not to the edge of the Reach the pressure point so that the edge area is not interrupted, what would cause that of the wells before printing Let the ink taken up in the printing process preferably in such places can. This would then lead to the aforementioned irregular limitation of the Print image of a print point.
  • the superstructures are so arranged that the edge of a pressure point is not cut by a depression.
  • the pressure points are arranged periodically and that the superstructures periodically with the same Period or a multiple of this period are arranged. This means that the superstructure superimposed on a pressure point to that of the neighboring one Superstructures superimposed on pressure points have the same spacing as that Pressure point itself. If the period of the superstructures is a multiple of the Period of the pressure points corresponds, this means that some pressure points are not are superimposed by a superstructure, i.e. have no depressions.
  • the Superstructure formed by at least one annular depression per pressure point is.
  • the annular depressions are preferably each concentric to the Center of the pressure point and arranged with several wells per Pressure points do not intersect each other.
  • One designed in this way Superstructure has the advantage that the color absorbed by the depression when Printing process evenly in all directions across the printing area of the dot runs and gives an even, large color transfer. It can too several annular, preferably arranged concentrically to the center of the pressure point Wells are arranged per pressure point, but for reasons of one largest possible volume of the circular depressions the number of ring-shaped depressions is limited at the top, because on the one hand the flanks of the For reasons of strength, depressions must not be steep.
  • the width of the depressions is also limited by the pigment size of the color particles, because the depressions must not be so narrow that there are color particles in them can jam.
  • the Superstructure formed by a depression located in the center of the pressure points is. Even with such a superstructure, there is an evenly large color transfer achieved without irregular boundaries of the printing dots in the printed image can appear.
  • the printing form and printing machines according to the invention with such Printing presses are used in rotary high-pressure processes, which also include Flexographic printing counts.
  • Such printing processes can also be used Printing on substrates made of hard, non-absorbent material, especially of glass. Especially for printing on This is suitable for glass panes for screens with a fluorescent layer Flexographic printing. Above all, let flat screens for color television tubes advantageous with an inventive, for printing on flat and Manufacture bendable substrates suitable flexo printing machine.
  • z. B a black matrix of color filters. Conductor tracks, resistance layers, Barrier and spacing structures on the surface of screens in question.
  • Fig. 1 is a flexographic printing press that is suitable for printing, for example Glass panels suitable for flat screens, shown in a schematic representation.
  • the actual printing unit comprises an ink tray 1 containing the printing ink, one in the ink dipping roller 2, the printing form or the cliché 3 supporting plate cylinder 4 and a screened inking roller 5, the in turn transfers the printing ink from the dipping roller 2 to the printing form 3.
  • the Dip roller 2, the plate cylinder 4 and the screened inking roller 5 are in Usually stored on a machine frame 6 and in a Drawing not shown gear driven synchronously, so that their Circumferential speeds are the same among themselves.
  • a device 7 is located behind the plate cylinder 4 on the machine frame 6 arranged with the help of which after the printing process on the printing form 3 adhering ink residues can be removed from the printing plate 3.
  • This device 7 is here just like the sled transport system with one on rails 10 movable carriage 9 on which the glass pane 8 in a precisely defined position positioned and held, are not described in detail. For this, be on the already mentioned DE-C1-43 24 577.
  • the printing form 3 which is applied to the plate cylinder 4, consists in a known manner of a carrier film 30 and a photopolymer layer 32 with the printing dots 33, which are arranged periodically with a basic grid period in a basic grid forming the print motif.
  • the printing form 3 is drawn onto the plate cylinder 4 in a known and preferred manner via an elastic foam adhesive film 31.
  • Two pressure points 33 can be seen in FIG. A superstructure is superimposed on the pressure points 33, which here is formed by depressions 34 and extends as far as the edge region 35 of the pressure points 33.
  • the color that is held on the surface of the printing dots 33 is transferred to the glass pane 8 during the rolling process, so that color areas 40 result on the upper side of the glass pane 8.
  • a pressure point 33 of a printing form shown in FIG. 2 is in a plan view in Fig. 3 shown. It can be seen that the superstructure caused by Wells 34 is formed, the pressure points is superimposed so that also in the edge regions are depressions 34. The outer limit of the Pressure point 33 is therefore interrupted by the superstructure and it is not well-defined limitation of the pressure point 33 more guaranteed. This effect, which is particularly important in cases where only a small number of Wells 34 of the superstructure on a pressure point 33 can be omitted from the already described photolithographic manufacturing process of the printing form occur.
  • the pressure point 33 is here hexagonal designed.
  • a section of a side view of a printing form with such 5 shows pressure points.
  • annular recess 341 It is important when dimensioning the annular recess 341 that it is does not extend to the edge region 35 of a pressure point 33. This would be too the disadvantages mentioned, namely that no regular and defined Limitation of the color area on the glass pane could be achieved. Moreover Adequate stability of the pressure point must be guaranteed to a to avoid undesirable squeezing of the pressure point. This will do so achieved that the raised points of the pressure point 33, that is, the edge areas 35th and the central region 36. is not too thin. The width and depth of the annular depression 341 must match the pigment size of the paint used be adjusted to ensure adequate filling and emptying of the printing ink guarantee.
  • FIG. 6 shows the arrangement of a plurality of pressure points shown in FIG. 4 on one Printing form shown in a plan view.
  • a print motif that can be achieved with this is shown in Fig. 7 shown.
  • the pressure points along two adjacent lines e.g. A1, A3 and B0, B2, B4 are staggered in the example shown.
  • the pressure points are the indicated manner distributed over the entire printing form.
  • the superstructure ie here the annular depressions
  • the pressure points with the same period superimposed in such a way that on the No depressions are arranged at the edge areas of the pressure points.
  • the advantage of the hexagonal pressure points arises for Flat panel displays.
  • Printing form is supposed to put a color on the substrate, which is generally glass, be applied, the color pigments under suitable lighting fluoresce.
  • the one with fluorescent color pigments colored area portion of a flat screen be as large as possible and that for switching the individual pressure points on and off necessary switching lines as small or narrow as possible.
  • Hexagonal Pressure points result in dividing bars of uniform width and thus one greatest possible surface coverage with light-emitting or translucent points.
  • the first printing form When used for printing on glass panes for color television screens three such printing forms must be used, the first printing form only has pressure points at positions A1, B4, C1, which is the first Fluorescent suspension, for example, the red color transferred and the red Color spots R result.
  • a second printing form then only has pressure points on the Place A3, B0, C3, which then create the green patches G, a third Printing form has pressure dots at position B2, which finally have a blue one Color spot B created.
  • FIG. 8 shows a further embodiment of a pressure point 33 in one Top view and the associated side view shown in FIG. 9.
  • the pressure point 33 here has a central region 342, which is recessed relative to the edge region 35 on. A lot of color can accumulate here before printing is transferred to the glass pane during the printing process.
  • the recess 342 is like this arranged and only so large that the edge region 35 is not interrupted by it is, so that the disadvantages mentioned are avoided even with such a printing form become.
  • any number of differently designed superstructures are conceivable, which can be superimposed on the pressure points, for example triangular, rectangular or linear depressions. Even several can annular depressions can be arranged on a pressure point.
  • the superstructure can also be done by raising the pressure point instead of by depressions are formed, always with the stated requirements for the stability of the Pressure points and dimensioning to prevent constipation Fluorescent grains must be observed.
  • the outer shape of the pressure points can also other than circular or hexagonal, for example square or polygonal with more than six corners.
  • a printing form according to the invention is produced in DE-C1-43 24 577 in a known manner by photochemical means.
  • two films one for the basic grid and a second for the superstructure, Take special care to ensure that the negative films with high accuracy are produced and the negative film (superstructure film) with the grid of Overstructure the negative film with the basic grid for the exposure of the Printing form is superimposed precisely

Landscapes

  • Printing Methods (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Optical Filters (AREA)
  • Electroluminescent Light Sources (AREA)

Claims (7)

  1. Plaque d'impression (3) pour l'impression rotative en relief dans laquelle les points d'impression (33) transmettant la couleur d'impression forment une trame de base et sont superposés par une superstructure formée par des évidements (34),
        caractérisée en ce que les superstructures sont disposées de la même manière par rapport aux points d'impression (33) et sont superposées aux points d'impression (33) de telle sorte qu'il n'y ait pas d'évidement (34) aux zones marginales (35) des points d'impression (33).
  2. Plaque d'impression selon la revendication 1,
        caractérisée en ce que les points d'impression (33) sont disposés périodiquement et que les superstructures (34) sont disposées périodiquement avec la même période ou un multiple de cette période.
  3. Plaque d'impression selon l'une des revendications 1 ou 2,
        caractérisée en ce que la superstructure est formée par au moins un évidement circulaire (341) par point d'impression (33).
  4. Plaque d'impression selon l'une des revendications 1 ou 2,
        caractérisée en ce que la superstructure est formée par un évidement (342) situé au centre des points d'impression (33).
  5. Plaque d'impression selon Tune des revendications précédentes,
        caractérisée en ce que les points d'impression (33) sont de conception circulaire ou hexagonale.
  6. Machine d'imprimerie, en particulier machine de flexographie, avec une plaque d'impression selon la revendication 1.
  7. Mise en oeuvre de la machine d'imprimerie selon la revendication 6 en vue de l'impression d'un article à imprimer en un matériau dur et non absorbant, en particulier en verre, en particulier pour l'impression de plaques de verre pour des écrans dotés d'une couche luminescente.
EP97203102A 1996-10-16 1997-10-07 Plaque d'impression pour l'impression rotative en relief Expired - Lifetime EP0836951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19642634A DE19642634A1 (de) 1996-10-16 1996-10-16 Druckform für ein Rotations-Hochdruckverfahren
DE19642634 1996-10-16

Publications (3)

Publication Number Publication Date
EP0836951A2 EP0836951A2 (fr) 1998-04-22
EP0836951A3 EP0836951A3 (fr) 1999-08-25
EP0836951B1 true EP0836951B1 (fr) 2002-04-17

Family

ID=7808886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203102A Expired - Lifetime EP0836951B1 (fr) 1996-10-16 1997-10-07 Plaque d'impression pour l'impression rotative en relief

Country Status (5)

Country Link
US (1) US5884560A (fr)
EP (1) EP0836951B1 (fr)
JP (1) JPH10119446A (fr)
KR (1) KR19980032956A (fr)
DE (2) DE19642634A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3521323B2 (ja) * 1998-12-18 2004-04-19 株式会社日立製作所 天井埋込形の室内機
WO2000039640A1 (fr) * 1998-12-25 2000-07-06 Asahi Kasei Kabushiki Kaisha Cliche flexographique et planche originale pour ce dernier
US6731405B2 (en) 1999-05-14 2004-05-04 Artwork Systems Printing plates containing ink cells in both solid and halftone areas
US6213018B1 (en) * 1999-05-14 2001-04-10 Pcc Artwork Systems Flexographic printing plate having improved solids rendition
US7580154B2 (en) * 1999-05-14 2009-08-25 Esko Ip Nv Printing plates containing ink cells in both solid and halftone areas
KR100649722B1 (ko) * 2000-04-21 2006-11-24 엘지.필립스 엘시디 주식회사 일렉트로루미네센스 표시소자의 패터닝장치 및 이를이용한 패터닝방법
DE10107556A1 (de) * 2001-02-17 2002-09-05 Saueressig Gmbh & Co Druckform mit einer elastischen Funktionsschicht
US7126724B2 (en) * 2003-03-11 2006-10-24 Kodak Graphic Communications Canada Company Flexographic printing
US8132508B2 (en) 2005-04-14 2012-03-13 Esko Software Bvba Method of controlling ink film thickness on a printing plate
CA2629661C (fr) * 2007-12-11 2015-01-06 Sumita Company Ltd. Cliche typographique
SE535722C2 (sv) * 2011-02-23 2012-11-20 Stora Enso Oyj Metod och rotogravyrtryckanordning för tryckning medelst ESA-metoden
JP6278942B2 (ja) * 2015-10-21 2018-02-14 日本航空電子工業株式会社 フレキソ印刷による絶縁膜の形成方法
NL2016019B1 (en) * 2015-12-23 2017-07-03 Xeikon Prepress Nv Improved flexography printing.
DE102021128652B4 (de) 2021-11-03 2024-01-18 Ardagh Metal Packaging Europe Gmbh Drucksystem und Verfahren zum Bedrucken eines Objekts

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH94696A (de) * 1920-12-13 1922-05-01 Winkler Fallert & Co Maschf Klischee für Autotypiedruck.
US3891443A (en) * 1973-02-01 1975-06-24 Polychrome Corp Mat finish photosensitive relief plates
US4152986A (en) * 1976-12-03 1979-05-08 Dadowski Gilbert F Method and apparatus for printing raised ink images
GB1585202A (en) * 1977-02-07 1981-02-25 Letraset International Ltd Relief printing plates
CA2036424A1 (fr) * 1990-02-23 1991-08-24 Albert C. Chiang Cliche photopolymere
DE69410869T2 (de) * 1993-04-05 1998-12-10 De La Rue Giori Sa Druckplatte
DE4324577C1 (de) * 1993-07-22 1994-12-15 Ver Glaswerke Gmbh Druckform für ein Hochdruckverfahren, Verwendung der Druckform zum Bedrucken von Glasoberflächen sowie Verfahren zur Herstellung einer ein Druckraster aufweisenden Druckform für das Flexodruckverfahren
US5544582A (en) * 1993-11-03 1996-08-13 Corning Incorporated Method for printing a color filter

Also Published As

Publication number Publication date
JPH10119446A (ja) 1998-05-12
DE19642634A1 (de) 1998-04-23
KR19980032956A (ko) 1998-07-25
EP0836951A3 (fr) 1999-08-25
US5884560A (en) 1999-03-23
EP0836951A2 (fr) 1998-04-22
DE59707029D1 (de) 2002-05-23

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