EP0428069B1 - Procédé pour l'impression d'un support d'affichage avec un modèle imprimé et rouleau d'impression pour ce procédé - Google Patents

Procédé pour l'impression d'un support d'affichage avec un modèle imprimé et rouleau d'impression pour ce procédé Download PDF

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Publication number
EP0428069B1
EP0428069B1 EP90121398A EP90121398A EP0428069B1 EP 0428069 B1 EP0428069 B1 EP 0428069B1 EP 90121398 A EP90121398 A EP 90121398A EP 90121398 A EP90121398 A EP 90121398A EP 0428069 B1 EP0428069 B1 EP 0428069B1
Authority
EP
European Patent Office
Prior art keywords
printing
roller
temperature
covering
silicone
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
EP90121398A
Other languages
German (de)
English (en)
Other versions
EP0428069A3 (en
EP0428069A2 (fr
Inventor
Michael Reichelt
Kurt-Manfred Tischer
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Deutschland GmbH
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 Nokia Deutschland GmbH filed Critical Nokia Deutschland GmbH
Publication of EP0428069A2 publication Critical patent/EP0428069A2/fr
Publication of EP0428069A3 publication Critical patent/EP0428069A3/de
Application granted granted Critical
Publication of EP0428069B1 publication Critical patent/EP0428069B1/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
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing

Definitions

  • the invention relates to a method for printing z. B. fluorescent or black matrix strips on a flat or cylindrical print sample carrier, in particular the front window of a display.
  • a generic method according to the preamble of claim 1 is known from DE 3709206.
  • a flat cliché is used with indentations, the course of which corresponds to the structure to be printed.
  • the wells are covered with ink, i.e. H. a mixture of hot glue filled with the respective phosphor or black matrix particles to be printed.
  • Flat clichés are transferred to the flat front screen using the pad printing process, in which the printing ink is removed from the cliché by a printing roller and is then printed onto the front screen.
  • the hardness of the roller covering is generally between 40 and 80 Shore A, but it is pointed out in DE 3709206 that a particularly soft roller covering with a hardness value between 2 and 20 Shore A is used.
  • the material from which this very soft roller covering is made is not disclosed.
  • the print image in the cliché is so pre-distorted compared to the actual print image for the windscreen that distortions caused by temperature differences between the The cliché and the front screen as well as the deformation of the pressure roller during the transfer are to be compensated so that the actually desired pattern is produced on the front screen.
  • a front screen When a front screen is printed for a color display, strips or dot structures are printed in succession with three different phosphors, each of which glows in a different color when excited by an electron beam. Black matrix stripes or areas are also often printed, in such a way that a black matrix stripe lies between every two adjacent phosphor stripes.
  • the windshield to be printed moves on a tape past four clichés, which are essentially at the same height as the windshield.
  • the respective print pattern is then transferred by a reciprocating printing roller for each cliché when the front screen is at the respective cliché.
  • Print patterns of color or black matrix or other materials are not only produced on front screens for displays with electron beam excitation, but also e.g. B. on the front or back substrate of an LCD or an electroluminescent display.
  • the print sample carriers can be flat or cylindrical, disk-shaped or foil-shaped.
  • a printing roller is used for transferring hot-melt printing material from a printing plate to a display printing sample carrier, the coating of which consists of silicone oil-free silicone rubber.
  • the covering is advantageously cast from the material mentioned.
  • tampons made of silicone oil-containing silicone rubber have been used in tampon printing processes.
  • the silicone oil serves as a release agent, which ensures that the ink absorbed by the tampon can be easily transferred to the medium to be printed.
  • the release agent the tampon takes on color when the cliché provides it in sufficient quantities. It has now been found that tiny amounts of silicone oil get onto areas not yet printed when the substrate is printed. Printing ink adheres very poorly to such surfaces wetted with silicone oil in a subsequent print.
  • roller covering consists of silicone oil-free silicone rubber means that the effect just mentioned does not apply to printing. This means that an equally well-adhering carrier surface is available for all successive prints.
  • roller covering is cast from silicone oil-free silicone rubber.
  • Such a printing roller has a very smooth surface that takes sufficient color from the cliché and transfers it very well to a print sample carrier.
  • Silicone rubber also free of silicone oil, can be manufactured within a wide range of different hardnesses. It has been found that for structurally accurate printing, the finer the structure to be printed, the softer the design of the roller covering. When printing very fine matrix strips, the best results were achieved with a surface hardness of around 40 - 50 Shore A. For coarser structures, the surface hardness can increase to about 80 Shore A.
  • the printing roller 10 shown in FIG. 1 consists of a metallic hollow cylinder 11 with a bearing axis 12 and a roller covering 13.
  • the bearing axis 12 is easily supported in two roller bearings 14.1 and 14.2.
  • a device (not shown) for moving the pressure roller 10 back and forth acts on the roller bearings.
  • the roller surface can be heated by an electrical, temperature-controlled heating device 15.
  • the hollow cylinder 11 is roughened on its surface in order to ensure that the roller covering 13 adheres well to it.
  • the roller covering is cast from silicone oil-free silicone rubber. According to the instructions of the inventors, a roller with such a covering was manufactured by Tampo Print GmbH in Alertshausen, Federal Republic of Germany and can be obtained from there.
  • a cliché is first heated to a predetermined temperature with hot glue and kept at this temperature.
  • an adhesive was used as the hot-melt adhesive, which can be obtained under the designation 64/5211 from Blythe, Holland. Conventional black matrix or phosphor particles were added to this adhesive in such an amount that their proportion was about 80 percent by weight.
  • the hot-melt printing materials thus formed are liquid at a plate temperature of around 60 ° C.
  • the printing roller 10 was heated to about 30 ° C, that is to a temperature a few degrees below the plate temperature. This roller temperature, like the plate temperature, was maintained with an accuracy of a few ° C over the long term.
  • the windshields used were fed to the printing device at ambient temperature, that is to say in the range around 20 ° C., and thus a few degrees Celsius cooler than the roller temperature.
  • the pressure roller was rolled over a respective cliché and then onto the windscreen located at the same height.
  • the angle of rotation of the printing roller was set to a respectively predetermined value in order to enable precise printing.

Landscapes

  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Optical Filters (AREA)

Claims (3)

  1. Procédé pour transférer un matériau d'impression thermoadhésif d'un cliché sur un support de motif pour écran, les différents groupes de bandes du motif d'impression étant imprimés sur le support de motif au moyen d'un rouleau dont la surface d'impression présente une dureté très faible, caractérisé par le fait qu'on utilise pour la surface d'impression du rouleau (10) un revêtement (13) en caoutchouc silicone qui ne contient pas d'huile de silicone et présente une dureté comprise entre 40 et 80 shores A, que la température du rouleau (10) est maintenue à une valeur inférieure de quelques 10°C par rapport à la température du cliché et que la température du support de motif est maintenue à une valeur inférieure de quelques degrés Celsius par rapport à la température du rouleau.
  2. Procédé selon la revendication 1, caractérisé par le fait que la dureté du revêtement est comprise entre 40 et 50 shores A.
  3. Procédé selon la revendication 1, caractérisé par le fait que la température du cliché est d'environ 60°C et celle du support de motif d'environ 20°C.
EP90121398A 1989-11-15 1990-11-08 Procédé pour l'impression d'un support d'affichage avec un modèle imprimé et rouleau d'impression pour ce procédé Expired - Lifetime EP0428069B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3937942 1989-11-15
DE3937942A DE3937942A1 (de) 1989-11-15 1989-11-15 Verfahren zum bedrucken eines display-druckmustertraegers und druckwalze fuer ein derartiges verfahren

Publications (3)

Publication Number Publication Date
EP0428069A2 EP0428069A2 (fr) 1991-05-22
EP0428069A3 EP0428069A3 (en) 1991-07-17
EP0428069B1 true EP0428069B1 (fr) 1995-02-01

Family

ID=6393555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121398A Expired - Lifetime EP0428069B1 (fr) 1989-11-15 1990-11-08 Procédé pour l'impression d'un support d'affichage avec un modèle imprimé et rouleau d'impression pour ce procédé

Country Status (5)

Country Link
EP (1) EP0428069B1 (fr)
JP (1) JP3035332B2 (fr)
AT (1) ATE117946T1 (fr)
DE (2) DE3937942A1 (fr)
ES (1) ES2070243T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0592678A (ja) * 1991-10-02 1993-04-16 Sumitomo Rubber Ind Ltd 印刷用オフセツトブランケツト
DE19808149C2 (de) * 1998-02-27 2002-03-21 Rolf Grahneis Druckwalze und Verfahren zu ihrer Herstellung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619446A (en) * 1968-02-02 1971-11-09 Rowland Products Inc Method for making resiliently faced rolls
JPS5636077B1 (fr) * 1971-06-07 1981-08-21
US4479432A (en) * 1980-05-15 1984-10-30 Toppan Printing Co., Ltd. Thick film printing method
CA1216112A (fr) * 1982-09-17 1987-01-06 Ronald E. Johnson Membrane de captage
DE3709206A1 (de) * 1987-03-20 1988-09-29 Standard Elektrik Lorenz Ag Herstellverfahren fuer den leuchtschirm einer bildwiedergabevorrichtung

Also Published As

Publication number Publication date
DE3937942A1 (de) 1991-05-16
EP0428069A3 (en) 1991-07-17
ES2070243T3 (es) 1995-06-01
EP0428069A2 (fr) 1991-05-22
ATE117946T1 (de) 1995-02-15
DE59008410D1 (de) 1995-03-16
JPH03169594A (ja) 1991-07-23
JP3035332B2 (ja) 2000-04-24

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