EP1258350B1 - Method and apparatus for imaging in printing machines - Google Patents
Method and apparatus for imaging in printing machines Download PDFInfo
- Publication number
- EP1258350B1 EP1258350B1 EP20020007602 EP02007602A EP1258350B1 EP 1258350 B1 EP1258350 B1 EP 1258350B1 EP 20020007602 EP20020007602 EP 20020007602 EP 02007602 A EP02007602 A EP 02007602A EP 1258350 B1 EP1258350 B1 EP 1258350B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- image carrier
- printed image
- plate cylinder
- printing
- 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
Links
- 238000007639 printing Methods 0.000 title claims description 39
- 238000003384 imaging method Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 12
- 238000000576 coating method Methods 0.000 claims description 48
- 239000011248 coating agent Substances 0.000 claims description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 229910052760 oxygen Inorganic materials 0.000 claims description 21
- 239000001301 oxygen Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical class [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims 1
- 231100000489 sensitizer Toxicity 0.000 claims 1
- 238000002679 ablation Methods 0.000 description 3
- 238000007645 offset printing Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003094 microcapsule Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007774 anilox coating Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920001477 hydrophilic polymer Polymers 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1075—Mechanical aspects of on-press plate preparation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
- B41C1/1033—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials by laser or spark ablation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
- B41P2227/70—Forming the printing surface directly on the form cylinder
Definitions
- the invention relates to a method for imaging in printing presses, in which the plate cylinder is designed as a print image carrier or provided with a printing image carrier designed as a printing image carrier, applied an ablatable coating on the print image carrier and this is ablated to produce motivating bodies by a thermally operating imaging device ,
- the invention further relates to a printing press with a plate cylinder and an imaging device associated with the plate cylinder for carrying out this method.
- a method and a device for imaging in printing machines in which a hydrophilic coating is applied to the hydrophobic surface of a plate cylinder.
- a hydrophobic coating is applied to the hydrophilic surface of the plate cylinder.
- the apparatus includes a coating head for applying the coating, a dryer for curing the coating, a means for ablating the applied coating, a means for cleaning the developed layer, and a quenching means for removing the coating from the surface of the plate cylinder.
- EP-A-0580393 describes a printing press comprising a plate cylinder and a thermal imaging device associated with the plate cylinder, the plate cylinder being provided with a print image carrier formed as a printing plate and the print image carrier being provided with a thermal ablatable coating.
- the object of the invention is to develop a method and a device for imaging, by which the energy input is substantially reduced.
- the invention has the advantage that energy is saved in the imaging process according to the invention.
- the laser or Erodier beautifully burns the removed material residue, so that no development or no removal of this material is required.
- FIG. 1 shows a printing unit 1 of a multicolour sheet-fed rotary printing press.
- Each printing unit 1 contains, as a sheet-guiding cylinder, a printing cylinder 2 and a transfer cylinder 3 and, as a printing image transfer cylinder, a plate cylinder 4 and a blanket cylinder 5.
- Each printing form cylinder 4 is assigned an inking unit 6 and a dampening unit 7.
- a pressure plate 11 or a sleeve 12 can be clamped (see Figures 2 and 3).
- the plate cylinder 4 can furthermore be assigned a coating device 8 and a imaging device 91 designed as a chamber doctor blade / anilox roller combination for applying the coating in the printing press.
- the imaging device 91 for imaging the plate cylinder 4 or the printing plate 11 is designed on the basis of a thermal ablation laser. However, the material can also be removed thermally in another way, e.g. by a thermally operating Erodier sensible (spark erosion).
- FIG. 2 shows a first variant in which the surface 41 of the plate cylinder 4 serves as a print image carrier. It is located on the preferably made of chrome, aluminum or ceramic water-absorbing surface 41 of the plate cylinder 4 is a color-receiving, closed and mechanically stable coating 101.
- a material for this coating 101 may be, for example, a polymer which is applied inline by the coating device 8 and dried by a dryer, not shown here.
- FIG. 3 shows a further variant.
- the coating 102 is applied to a print image carrier which is mounted in the form of a printing plate 11 or in the form of a sleeve 12 on the surface of the plate cylinder 42.
- the surface of the pressure plate 11 or the surface of the sleeve 12 is ink receptive.
- the coating 102 applied to the pressure plate 11 or the sleeve 12 has analogous properties to the coating 101 explained under FIG.
- the printed image carrier 4, 11, 12 is water absorbent and the coating is fartia-receptive.
- the invention can also be realized in waterless offset printing with the known dry offset printing plates.
- the coating 10, 101, 102 has opposite properties in terms of its ability to take up ink to the print image carrier 4, 11, 12.
- the coating 10, 101, 102 may consist of a polyester or other suitable inexpensive material with the required properties.
- oxygen donors are introduced into the coating 10, 101, 102 in a homogeneous, microscopically fine distribution. These oxygen donors are either introduced during the production of this material or are dispersed during coating in the coating 10, 101, 102.
- Preferred oxygen donors are chlorates.
- potassium chlorate is particularly suitable for this purpose.
- nitric compounds, peroxides and similar compounds which contain oxygen in a loose bond, similar to the abovementioned materials.
- a focusable imaging device 91, 92 is used by a thermal laser (see FIGS. 2 and 3) or by an eroding tool the oxygen reacts with the coating material. There are localized exothermic reactions. This reaction remains local because of the low thickness of the layer the base material of the reaction removes heat. The material at these points burns without residue, so that no aftertreatment is required.
- the stored oxygen donors In order to delete the image motifs after the printing process, the stored oxygen donors also unfold a favorable effect. With a surface laser or other suitable means, a large-scale energy input, so that the coating on the print image carrier 4,11,12 can burn without residue.
- FIG. 4 shows a further exemplary embodiment. It is assumed that a composition of the coating 103, which corresponds largely to the coating described in the above embodiments. In contrast to these, however, the oxygen is not incorporated in the coating 103 in the form of oxygen donors, but is brought to the current site of action of the imaging device 92. This takes place, as can be seen from FIG. 4, by means of an oxygen probe 922, which is arranged on the main body 921 of the imaging device 92. Again, there are localized exothermic reactions. These reactions also remain local due to the low thickness of the layer.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Printing Plates And Materials Therefor (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Bebildem in Druckmaschinen, bei dem der Plattenzylinder als Druckbildträger ausgebildet oder mit einem als Druckplatte oder Sleeve ausgebildeten Druckbildträger versehen ist, eine ablatierbare Beschichtung auf den Druckbildträger aufgebracht und diese zum Erzeugen von motivbildenden Stellen durch eine thermisch arbeitende Bebilderungseinrichtung ablatiert wird.The invention relates to a method for imaging in printing presses, in which the plate cylinder is designed as a print image carrier or provided with a printing image carrier designed as a printing image carrier, applied an ablatable coating on the print image carrier and this is ablated to produce motivating bodies by a thermally operating imaging device ,
Die Erfindung betrifft weiterhin eine Druckmaschine mit einem Plattenzylinder und einer dem Plattenzylinder zugeordneten Bebilderungseinrichtung zur Durchführung dieses Verfahrens.The invention further relates to a printing press with a plate cylinder and an imaging device associated with the plate cylinder for carrying out this method.
Aus der WO 9936266 A1 ist ein Verfahren und eine Einrichtung zum Bebildern in Druckmaschinen bekannt, bei dem auf die hydrophobe Oberfläche eines Plattenzylinders eine hydrophile Beschichtung aufgebracht wird. Als Option wird angegeben, eine hydrophobe Beschichtung auf die hydrophile Oberfläche des Plattenzylinders aufzubringen. Die Einrichtung beinhaltet einen Beschichtungskopf zum Auftragen der Beschichtung, eine Trockner zum Aushärten der Beschichtung, eine Einrichtung zum Ablatieren der aufgetragenen Beschichtung, eine Einrichtung zum Reinigen der entwickelten Schicht und eine Löscheinrichtung zum Entfemen der Beschichtung von der Oberfläche des Plattenzylinders.From WO 9936266 A1 a method and a device for imaging in printing machines is known in which a hydrophilic coating is applied to the hydrophobic surface of a plate cylinder. As an option, a hydrophobic coating is applied to the hydrophilic surface of the plate cylinder. The apparatus includes a coating head for applying the coating, a dryer for curing the coating, a means for ablating the applied coating, a means for cleaning the developed layer, and a quenching means for removing the coating from the surface of the plate cylinder.
Aus Kipphahn, "Handbuch der Printmedien", Springer Verlag 2000, Seite 668, 669, ist eine Lösung bekannt, bei der eine Beschichtung einer Druckplatte durch ein hydrophiles Polymer erfolgt, in das oleophile Mikrokapseln eingelagert sind. Durch einen Ablationslaser werden die oleophilen Mikrokapseln zerstört, so dass das Beschichtungsmaterial an diesen Stellen oleophil wird.From Kipphahn, "Handbook of print media", Springer Verlag 2000, page 668, 669, a solution is known in which a coating of a printing plate is carried out by a hydrophilic polymer, are embedded in the oleophilic microcapsules. An ablation laser destroys the oleophilic microcapsules so that the coating material becomes oleophilic at these locations.
EP-A-0580393 beschreibt eine Druckmaschine mit einem Plattenzylinder und einer dem Plattenzylinder zugeordneten thermisch arbeitenden Bebilderungseinrichtung, wobei der Plattenzylinder mit einem als Druckplatte ausgebildeten Druckbildträger versehen ist und der Druckbildträger mit einer auf thermischen Weg ablatierbaren Beschichtung ausgestattet ist.EP-A-0580393 describes a printing press comprising a plate cylinder and a thermal imaging device associated with the plate cylinder, the plate cylinder being provided with a print image carrier formed as a printing plate and the print image carrier being provided with a thermal ablatable coating.
Diese genannten Lösungen haben den Nachteil, dass hier ein hoher Energieeintrag sowohl beim Bebildern als auch beim Löschen der aufgebrachten Beschichtung erforderlich ist.These solutions mentioned have the disadvantage that a high energy input is required here both during imaging and when deleting the applied coating.
Die Aufgabe der Erfindung besteht darin, ein Verfahren und eine Einrichtung zum Bebildern zu entwickeln, durch welche der Energieeintrag wesentlich verringert wird.The object of the invention is to develop a method and a device for imaging, by which the energy input is substantially reduced.
Erfindungsgemäß wird die Aufgabe durch die Merkmale der Ansprüche 1, 5 und 6 gelöst.According to the invention the object is solved by the features of
Die Erfindung hat den Vorteil, dass bei dem erfindungsgemäßen Bebilderungsvorgang Energie eingespart wird. Der Laser oder die Erodiereinrichtung verbrennt das abgetragene Material rückstandslos, so dass keine Entwicklung bzw. kein Entfemen dieses Materials erforderlich ist.The invention has the advantage that energy is saved in the imaging process according to the invention. The laser or Erodiereinrichtung burns the removed material residue, so that no development or no removal of this material is required.
Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Die dazugehörigen Zeichnungen haben folgende Bedeutung:
- Figur 1
- Schematische Darstellung einer Bogenoffsetdruckmaschine
Figur 2- Darstellung der Beschichtung mit dem Plattenzylinder als Druckbildträger
Figur 3- Darstellung der Beschichtung mit einer Druckplatte oder einem Sleeve als Druckbildträger
Figur 4- Darstellung eines Ablationslasers mit Sauerstoffsonde
- FIG. 1
- Schematic representation of a sheet-fed offset printing press
- FIG. 2
- Representation of the coating with the plate cylinder as a print image carrier
- FIG. 3
- Representation of the coating with a printing plate or a sleeve as a print image carrier
- FIG. 4
- Illustration of an ablation laser with oxygen probe
Die Figur 1 zeigt ein Druckwerk 1 einer Mehrfarben-Bogenoffsetrotationsdruckmaschine. Jedes Druckwerk 1 enthält als bogenführenden Zylinder einen Druckzylinder 2 und einen Übergabezylinder 3 und als druckbildübertragenden Zylinder einen Plattenzylinder 4 und einen Gummizylinder 5.FIG. 1 shows a printing unit 1 of a multicolour sheet-fed rotary printing press. Each printing unit 1 contains, as a sheet-guiding cylinder, a
Jedem Druckformzylinder 4 ist ein Farbwerk 6 und ein Feuchtwerk 7 zugeordnet. Auf dem Plattenzylinder 4 kann auch eine Druckplatte 11 oder ein Sleeve 12 aufgespannt sein (siehe hierzu die Figuren 2 und 3).Each
Dem Plattenzylinder 4 kann weiterhin zum Auftragen der Beschichtung in der Druckmaschine eine als Kammerrakel/Rasterwalzen-Kombination ausgeführte Beschichtungseinrichtung 8 und eine Bebilderungseinrichtung 91 zugeordnet werden. Die Bebilderungseinrichtung 91 zur Bebilderung des Plattenzylinders 4 bzw. der Druckplatte 11 ist auf der Basis eines thermischen Ablations-Lasers ausgeführt. Das Material kann aber auch thermisch auf eine andere Art abgetragen werden, z.B. durch eine thermisch arbeitende Erodiereinrichtung (Funkenerosion).The
In der Figur 2 wird eine erste Variante gezeigt, bei der die Oberfläche 41 des Plattenzylinders 4 als Druckbildträger dient. Dabei befindet sich auf der vorzugsweise aus Chrom, Aluminium oder Keramik bestehenden wasseraufnehmenden Oberfläche 41 des Plattenzylinders 4 eine farbaufnehmende, geschlossene und mechanisch stabile Beschichtung 101. Ein Material für diese Beschichtung 101 kann zum Beispiel ein Polymer sein, das durch die Beschichtungseinrichtung 8 inline aufgebracht und durch einen hier nicht dargestellten Trockner getrocknet wird.FIG. 2 shows a first variant in which the
In Figur 3 wird eine weitere Variante gezeigt Hier ist die Beschichtung 102 auf einem Druckbildträger aufgebracht, der in Form einer Druckplatte 11 oder in Form eines Sleeves 12 auf der Oberfläche des Plattenzylinders 42 aufgezogen ist. Dabei ist die Oberfläche der Druckplatte 11 oder die Oberfläche des Sleeves 12 farbaufnehmend. Die auf die Druckplatte 11 oder den Sleeve 12 aufgebrachte Beschichtung 102 hat analoge Eigenschaften zu der unter Figur 2 erläuterten Beschichtung 101.FIG. 3 shows a further variant. Here, the
In weiteren, hier nicht dargestellten und auch nicht näher beschriebenen Ausführungen ist der Druckbildträger 4,11,12 wasseraufnehmend und die Beschichtung ist fartiaufnehmend.In further embodiments, not shown here and also not described in more detail, the printed
Die Erfindung kann auch beim wasserlosen Offsetdruck mit den bekannten Trockenoffset-Druckplatten realisiert werden.The invention can also be realized in waterless offset printing with the known dry offset printing plates.
Allen oben genannten Ausführungen ist gemeinsam, dass die Beschichtung 10, 101, 102 hinsichtlich ihrer Farbaufnahmefähigkeit zum Druckbildträger 4,11,12 entgegengesetzte Eigenschaften aufweist. Die Beschichtung 10, 101, 102 kann aus einem Polyester oder einem anderen geeigneten kostengünstigen Stoff mit den geforderten Eigenschaften bestehen. In jedem Fall sind in die Beschichtung 10, 101, 102 neben den bekannten Sensibilisatoren Sauerstoffdonatoren in homogener, mikroskopisch feiner Verteilung eingebracht. Diese Sauerstoffdonatoren werden entweder im Zuge der Herstellung dieses Werkstoffs eingebracht oder werden beim Beschichten in die Beschichtung 10, 101, 102 dispergiert.It is common to all the above-mentioned embodiments that the
Bevorzugte Sauerstoffdonatoren sind Chlorate. Insbesondere Kaliumchlorat ist für diese Zwecke besonders geeignet. Es ist aber auch möglich, Salpeterverbindungen, Peroxide und ähnliche Verbindungen einzusetzen, die ähnlich den oben genannten Materialien Sauerstoff in lockerer Bindung enthalten.Preferred oxygen donors are chlorates. In particular, potassium chlorate is particularly suitable for this purpose. However, it is also possible to use nitric compounds, peroxides and similar compounds which contain oxygen in a loose bond, similar to the abovementioned materials.
Beim Energieeintrag wird eine fokussierbare Bebilderungseinrichtung 91, 92 eingesetzt durch einen thermischen Laser (siehe hierzu die Figuren 2 und 3) oder durch ein erodierendes Werkzeug reagiert der Sauerstoff mit dem Beschichtungsmaterial. Es kommt zu lokal begrenzten exothermen Reaktionen. Diese Reaktion bleibt, bedingt durch die geringe Stärke der Schicht, örtlich begrenzt, da das Grundmaterial der Reaktion Wärme entzieht. Das Material an diesen Stellen verbrennt rückstandslos, so dass keine Nachbehandlung erforderlich wird.During energy input, a
Um die Bildmotive nach dem Druckvorgang zu löschen, entfalten die eingelagerten Sauerstoffdonatoren ebenfalls eine wrteilhafte Wirkung. Mit einem Flächenlaser oder mit anderen geeigneten Einrichtungen erfolgt ein großflächiger Energieeintrag, so dass die Beschichtung auf dem Druckbildträger 4,11,12 rückstandslos verbrennen kann.In order to delete the image motifs after the printing process, the stored oxygen donors also unfold a favorable effect. With a surface laser or other suitable means, a large-scale energy input, so that the coating on the
In der Figur 4 ist ein weiteres Ausführungsbeispiel dargestellt. Dabei wird von einer Zusammensetzung der Beschichtung 103 ausgegangen, die weitgehend der unter den oben genannten Ausführungsbeispielen beschrieben Beschichtung entspricht. Im Gegensatz zu diesen ist der Sauerstoff aber nicht in Form von Sauerstoffdonatoren in die Beschichtung 103 eingebunden, sondern wird an die aktuelle Wirkungsstelle der Bebilderungseinrichtung 92 herangebracht. Das erfolgt, wie aus der Figur 4 ersichtlich, durch eine Sauerstoffsonde 922, die an dem Grundkörper 921 der Bebilderungseinrichtung 92 angeordnet ist. Auch hier kommt es zu lokal begrenzten exothermen Reaktionen. Diese Reaktionen bleiben ebenfalls, bedingt durch die geringe Stärke der Schicht, örtlich begrenzt.FIG. 4 shows a further exemplary embodiment. It is assumed that a composition of the
- 11
- Druckwerkprinting unit
- 22
- Druckzylinderpressure cylinder
- 33
- ÜbergabezylinderTransfer cylinder
- 44
- Plattenzylinderplate cylinder
- 4141
- Oberfläche des PlattenzylindersSurface of the plate cylinder
- 4242
- Oberfläche des PlattenzylindersSurface of the plate cylinder
- 55
- GummituchzylinderBlanket cylinder
- 66
- Farbwerkinking
- 77
- Feuchtwerkdampening
- 88th
- Beschichtungseinrichtungcoater
- 9191
- Bebilderungseinrichtungimaging
- 9292
- Bebilderungseinrichtungimaging
- 921921
- Grundkörperbody
- 922922
- Sauerstoffsondeoxygen probe
- 1010
- Beschichtungcoating
- 101101
- Beschichtungcoating
- 102102
- Beschichtungcoating
- 103103
- Beschichtungcoating
- 1111
- Druckplatteprinting plate
- 1212
- SleeveSleeve
Claims (14)
- Method of imaging in printing machines, in which the plate cylinder (4) is constructed as a printed image carrier or is provided with a printed image carrier constructed as a printing plate (11) or sleeve (12), an ablatable coating (10, 101, 102, 103) is applied to the printed image carrier (4, 11, 12) and this is ablated by a thermally operating imaging device (91, 92) for producing subject-forming locations, wherein this burning process is carried out in locally limited manner with an excess of oxygen.
- Method of imaging in printing machines according to claim 1, characterised in that the ablatable layer has, with respect to its ink absorption capability, characteristics opposite to the print image carrier (4, 11, 12).
- Method of imaging in printing machines according to claim 1, characterised in that the coating (10, 101, 102) contains oxygen donors in homogenous, microscopically fine distribution and/or in the course of the coating process oxygen donors are dispersed in homogeneous, microscopically fine distribution in the coating (10, 101, 102).
- Method of imaging in printing machines according to claim 1, characterised in that during the thermal reaction in the coating (103) oxygen is fed in metered form to the instantaneous point of action of the imaging device (92).
- Printing machine with a plate cylinder and a thermally operating imaging device associated with the plate cylinder, wherein the plate cylinder (4) is constructed as a printed image carrier or is provided with a printed image carrier constructed as a printing plate (11) or sleeve (12) and the printed image carrier (4, 11, 12) is furnished with a coating (10, 101, 102) able to be ablated in a thermal manner, characterised in that the coating comprises oxygen donors in homogeneous, microscopically fine distribution.
- Printing machine with a plate cylinder and a thermally operating imaging device associated with the plate cylinder, wherein the plate cylinder (4) is constructed as a printed image carrier or is provided with a printed image carrier constructed as a printing plate (11) or sleeve (12) and the printed image carrier (4, 11, 12) is furnished with a coating (103) able to be ablated in a thermal manner, characterised in that an oxygen probe (922) for point-accurate feed of oxygen to the instantaneous point of action thereof is associated with the imaging device (92).
- Printing machine with a plate cylinder and a thermally operating imaging device, which is associated with the plate cylinder, according to claim 5 or 6, characterised in that the coating (10, 101, 102, 103) has, with respect to its ink absorption capability, characteristics opposite to the characteristics of the printed image carrier (4, 11, 12).
- Printing machine according to one of the preceding claims, characterised in that the printed image carrier (4, 11, 12) has a water-absorbing surface (41, 42) and the coating (10, 101, 102, 103) has ink-absorbing characteristics.
- Printing machine according to one of the preceding claims, characterised in that an energy source, which can be focussed, is used as imaging device (91, 92).
- Printing machine according to one of the preceding claims, characterised in that the imaging device (91) is constructed as a thermal laser and/or as a thermally eroding tool.
- Printing machine according to one of the preceding claims, characterised in that a polymer with embedded sensitisers is used as base material of the coating.
- Printing machine according to one of the preceding claims, characterised in that a chlorate is used as oxygen donor.
- Printing machine according to one of the preceding claims, characterised in that potassium chlorate is used as oxygen donor.
- Printing machine according to one of the preceding claims, characterised in that potassium nitrate compounds or peroxides are used as oxygen donors.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001123672 DE10123672B4 (en) | 2001-05-16 | 2001-05-16 | Method and system for imaging in printing presses |
| DE10123672 | 2001-05-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1258350A2 EP1258350A2 (en) | 2002-11-20 |
| EP1258350A3 EP1258350A3 (en) | 2005-03-23 |
| EP1258350B1 true EP1258350B1 (en) | 2006-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20020007602 Expired - Lifetime EP1258350B1 (en) | 2001-05-16 | 2002-04-04 | Method and apparatus for imaging in printing machines |
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| Country | Link |
|---|---|
| EP (1) | EP1258350B1 (en) |
| DE (2) | DE10123672B4 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005052156A1 (en) * | 2005-11-02 | 2007-05-03 | Man Roland Druckmaschinen Ag | Method for gravure print by means of detachable and reusable gravure cylinder, involves basic grid designed on maximal color quantity and impression of basic grid of gravure blank shape are simultaneously filled with filling material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249525A (en) * | 1988-08-19 | 1993-10-05 | Presstek, Inc. | Spark-discharge lithography plates containing image-support pigments |
| US5353705A (en) * | 1992-07-20 | 1994-10-11 | Presstek, Inc. | Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus |
| AU674518B2 (en) * | 1992-07-20 | 1997-01-02 | Presstek, Inc. | Lithographic printing plates for use with laser-discharge imaging apparatus |
| DE19817756A1 (en) * | 1997-05-01 | 1998-11-05 | Eastman Kodak Co | Method of producing image on lithographic element using laser |
| IL122953A (en) * | 1998-01-15 | 2000-11-21 | Scitex Corp Ltd | Printing member for use with a printing system and method of imaging the printing member |
| DE19840926B4 (en) * | 1998-09-08 | 2013-07-11 | Hell Gravure Systems Gmbh & Co. Kg | Arrangement for material processing by means of laser beams and their use |
| US6087069A (en) * | 1999-04-16 | 2000-07-11 | Presstek, Inc. | Lithographic imaging and cleaning of printing members having boron ceramic layers |
-
2001
- 2001-05-16 DE DE2001123672 patent/DE10123672B4/en not_active Expired - Fee Related
-
2002
- 2002-04-04 DE DE50206107T patent/DE50206107D1/en not_active Expired - Lifetime
- 2002-04-04 EP EP20020007602 patent/EP1258350B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10123672B4 (en) | 2006-12-21 |
| DE10123672A1 (en) | 2002-12-05 |
| EP1258350A3 (en) | 2005-03-23 |
| DE50206107D1 (en) | 2006-05-11 |
| EP1258350A2 (en) | 2002-11-20 |
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