EP1700709A2 - Procédé et appareil pour traitement d'une plaque d'impression réutilisable - Google Patents

Procédé et appareil pour traitement d'une plaque d'impression réutilisable Download PDF

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Publication number
EP1700709A2
EP1700709A2 EP06101616A EP06101616A EP1700709A2 EP 1700709 A2 EP1700709 A2 EP 1700709A2 EP 06101616 A EP06101616 A EP 06101616A EP 06101616 A EP06101616 A EP 06101616A EP 1700709 A2 EP1700709 A2 EP 1700709A2
Authority
EP
European Patent Office
Prior art keywords
printing
amphiphilic molecules
printing form
printing plate
aqueous solution
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
EP06101616A
Other languages
German (de)
English (en)
Other versions
EP1700709A3 (fr
EP1700709B1 (fr
Inventor
Martin Gutfleisch
Matthias Dr. Schlörholz
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1700709A2 publication Critical patent/EP1700709A2/fr
Publication of EP1700709A3 publication Critical patent/EP1700709A3/fr
Application granted granted Critical
Publication of EP1700709B1 publication Critical patent/EP1700709B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41C1/1008—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
    • 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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
    • 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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Definitions

  • the present invention relates to a method of treating a re-imageable printing plate after printing according to the preamble of claim 1.
  • the present invention relates to an apparatus for treating a re-imageable printing plate after printing according to the preamble of claim 9.
  • the DE 102 27 054 A1 describes a reusable printing form, in particular for use in offset printing, wherein the printing form z. B. has a support of titanium with a native oxidized titanium surface, which with amphiphilic molecules in aqueous or alcoholic solution, eg. B. is coated with a hydroxamic acid or a phosphonic acid such that the printing plate has a hydrophobic surface.
  • the printing form can be imaged by means of infrared light, wherein at the points which were exposed to infrared light, the amphiphilic molecules are removed and the hydrophilic surface of the printing plate is exposed. After a printing process, the surface of the printing form z. B.
  • UV extinguishing devices or other known extinguishing devices, such as.
  • plasma extinguishing devices or mechano-chemically acting devices to dispense and instead provide only a cleaning device and a device for covering with amphiphilic molecules. Since the production is interrupted during the re-imaging, there is also the desire to reduce this interruption by consuming extinguishing operations with long process times to a minimum or even avoid.
  • a method according to the invention for treating a re-imageable printing plate after printing, wherein the printing form has an amphiphilic-molecule-containing support and is cleaned of printing ink and provided with amphiphilic molecules for reprinting in the course of a re-imaging process, is characterized in that the printing plate in the History of Wiederbebsammlungsvorgangs is provided substantially before the cleaning of ink with amphiphilic molecules.
  • the re-imageable printing form in the still unpurified, ie provided with ink state already provided with amphiphilic molecules.
  • the amphiphilic molecules applied to the surface of the printing ink reach the surface of the printing plate at least at the points of the printing forme which are not provided with ink and bind there.
  • the surface of the printing form can be fully coated with amphiphilic molecules before the printing form is cleaned of printing ink. It has been found to be particularly advantageous that carrying out the cleaning after repopulation with amphiphilic molecules in a simpler manner feasible and in particular in a short time leads to a satisfactory cleaning result, since the ink does not come directly into contact with the surface of the carrier.
  • the surface of the printing form which was previously coated with amphiphilic molecules, is thus available for a renewed imaging process and subsequent re-printing.
  • a separate step of deleting the printing form can be advantageously avoided in this way, since the printing plate is transferred by the application of the amphiphilic molecules in a defined, homogeneously hydrophobic state and thus in an erased state.
  • the printing plate is provided with molecules in aqueous solution.
  • amphiphilic molecules in aqueous solution problems associated with the use of alcoholic solution due to low flash points can be advantageously avoided.
  • the water-soluble amphiphilic molecules can very easily diffuse through the dampening medium on the printing plate surface towards the surface of the support and bind there.
  • the aqueous solution does not dissolve the carrier, which would be expected with the use of ethanolic solution.
  • the printing plate is provided with Alcylphosphonklare in aqueous solution and / or located in aqueous solution of salt of Alcylphosphonklare.
  • the printing plate can also be provided with Alcylphosphat in aqueous solution and / or with befindlichem in aqueous solution salt of Alcylphosphat.
  • the printing plate is rinsed with water, in particular with distilled water, before and / or after being provided with amphiphilic molecules during the re-imaging process.
  • water in particular with distilled water
  • the dampening solution located on the printing form is replaced by water, by means of which the amphiphilic molecules can more easily reach the surface of the printing form than by the fountain solution mixed with auxiliaries.
  • an excess of such molecules can be easily removed.
  • Another embodiment of the method according to the invention is characterized in that the printing form is imaged with infrared radiation during the re-imaging process.
  • the amphiphilic molecules are removed from the surface of the printing form and the hydrophilic property of the printing form leads to a good moisturization at these points, ie to a very good wetting with Dampening solution.
  • the hydrophilic property of the printing form can be improved according to a further, particularly preferred embodiment of the invention by treating the printing form with a gumming agent during the re-imaging process. This deposits on the imaged areas of the printing form surface and positively influences the hydrophilic property.
  • the erfmdungshacke method for treating a Wegbembobaren printing form after printing and the advantageous embodiments of the method can also be used in a wet offset printing process, in which a Wegbecularbare printing form, which has a provided with amphiphilic molecules carrier is used.
  • a device for treating a re-imageable printing form after printing, wherein the printing form comprises a support provided with amphiphilic molecules, and wherein the device comprises a cleaning unit for cleaning the printing form of printing ink and a unit for covering the printing form with amphiphilic molecules characterized in that the device has a control unit which activates the unit for covering the printing form in amphiphilic molecules in such a way that it essentially acts before the cleaning unit in the course of a re-imaging operation.
  • a device according to the invention can be used in a substrate-processing machine, in particular in an offset printing press.
  • Fig. 1 shows schematically the sequence of an embodiment of the method according to the invention.
  • a titanium printing plate 110 which comprises a support 120 of titanium (Ti) with an oxidized surface 130 of titanium dioxide (TiO 2) - alternatively of TiOx, ZrO 2, A 12 O 3, another metal oxide or stainless steel - and a provided on the surface 130 occupancy with a layer 140 of amphiphilic molecules provided.
  • TiO 2 titanium dioxide
  • TiO 2 titanium dioxide
  • the surface of the printing plate 110 has a defined homogeneous hydrophobicity.
  • the printing plate 110 In a first preparation of the printing plate 110 before a first printing, the printing plate can be pre-cleaned with acetone in a first step and cleaned with ultraviolet radiation and activated (Example: using a xenon excimer UV lamp with an intensity of 45 mW / cm 2 and a wavelength of 172 nm, application about 10 minutes).
  • the printing plate 110 In a second step of the first preparation, the printing plate 110 can be immersed in 1 mM aqueous solution of amphiphilic molecules for up to 60 seconds, whereby the surface of the printing plate 110 obtains a hydrophobic character and becomes oleophilic for conventional offset printing inks.
  • titanium printing plates can also be roughened during the initial preparation, with a roughness (RMS) of approximately 350 nm having proved successful.
  • a process step 200 imaging
  • the printing plate 110 at non-image locations 210, ie at those locations which are not intended to accept color
  • infrared radiation 220 Example: wavelength about 810 to 1100 nm, power about 1 to 5 W, fluence about 30 to 40 J / cm 2 at a imaging speed, ie, a movement of the printing form, of about 1 to 2 m / s
  • the layer 140 ie the amphiphilic molecules
  • Irradiation produces imagewise hydrophilic areas.
  • the printing form 110 is imprinted with image information (positive image) in the form of remaining amphiphilic molecules or the printing form 110 with the image information is described.
  • the imaged printing form surface is coated with a gumming agent 260, e.g. B. the gum arabic-based product AGUM-Z (the company Hanns Eggen GmbH & Co. KG, Sarstedt in Germany), wetted and hydrophilized at the imaged sites.
  • a gumming agent 260 e.g. B. the gum arabic-based product AGUM-Z (the company Hanns Eggen GmbH & Co. KG, Sarstedt in Germany), wetted and hydrophilized at the imaged sites.
  • a method step 300 the printing forme 110 is provided with fountain solution 310, which adheres to the previously imaged and optionally rubberized areas 210.
  • the printing form 110 is provided with printing ink 410, which adheres to the locations of the printing form which are coated with amphiphilic molecules 140.
  • the locations of the printing form 110, which are coated with fountain solution 310 and therefore lipophobic, take on the other hand, no ink.
  • the surface of the printing form 110 has a printed image in the form of ink and fountain solution areas, and can therefore be used in a process step 500 (printing), e.g. As in the conventional wet offset printing process and in appropriately equipped offset printing presses are printed, including the surface of the printing plate 110 is brought into contact with a substrate 510.
  • the printed image can be reprinted several times, wherein the repeating 520 of steps 300 and 400, the printing plate 110 can be re-moistened and colored.
  • step 600 the printing plate 110 is rinsed with distilled water 610, which displaces the dampening solution located on the surface 110 and possibly contaminated.
  • a method step 700 (covering), the printing block 110, which is still uncoated by printing ink (or colorant-dampening emulsion), is charged with an aqueous solution of amphiphilic molecules, e.g. B. sprayed (alternatively: for example, dipping or rolling), which at the points 210, where dampening solution and / or distilled water is, reach the surface of the printing plate 110 and accumulate there, so that the surface 110 over the entire surface occupied with amphiphilic molecules 710 and the previous printed image is deleted. In other words, the previously imaged spots are refilled with amphiphilic molecules before cleaning ink.
  • an aqueous solution of amphiphilic molecules e.g. B. sprayed (alternatively: for example, dipping or rolling), which at the points 210, where dampening solution and / or distilled water is, reach the surface of the printing plate 110 and accumulate there, so that the surface 110 over the entire surface occupied with amphiphilic molecules 710 and the previous
  • the amphiphilic molecules must now diffuse to the printing plate surface only through the distilled water and not through the dampening solution, which may also contain isopropyl alcohol (IPA) and additives in addition to water Way leads to a better result in the occupancy with amphiphilic molecules and thus to a better erasure of the image information.
  • the exposure time of the aqueous solution of amphiphilic molecules is preferably about one minute. However, sufficient hydrophobization of the surface can be achieved after just a few seconds.
  • step 750 the printing plate 110 can be rinsed again with distilled water 760, whereby an excess of amphiphilic molecules can be removed.
  • a method step 800 cleaning
  • the printing form 110 is cleaned of printing ink 410.
  • the cleaning can be carried out using one or more cleaning agents, for. As the commercial cleaning agent Eurostar and IPA.
  • the printing plate 110 can be washed with ethanol and then z. B. are blown dry with nitrogen.
  • the printing plate 110 After completion of cleaning, the printing plate 110 is in a state corresponding to the state of printing in the provisioning step 100, that is, the printing plate 110 can be re-imaged, moistened, colored, printed and then processed (occupied and cleaned) by a repeat 810. In this way, the printing form can be used several times.
  • rinsing 600, coating 700, rinsing 750, cleaning 800, imaging 200, and hydrophilizing 250 may also be collectively referred to as a re-imaging process, wherein the reanimation process need not include all of these steps. So z. B. the optional process steps are omitted.
  • FIG. 2 the structure of an embodiment of the device according to the invention is shown schematically.
  • This has a printing form cylinder 912, a transfer cylinder 914 and an impression cylinder 916, wherein on the printing form cylinder 912 a printing plate 110 with a support 120 and a surface 130 and on the transfer cylinder 914 a blanket 915 are provided, and wherein a substrate 510 in the gap between the transfer cylinder 914 and the impression cylinder 916 is provided with ink.
  • the plate cylinder 912 may optionally be turned off the transfer cylinder 914.
  • a rinse unit 920 sprays the surface of the printing plate 110 with distilled water, thereby displacing the dampening solution.
  • a unit 930 for coating the printing plate 110 with amphiphilic molecules in aqueous solution is arranged downstream of the unit 920 in the direction of rotation of the printing plate cylinder 912 and sprays the surface of the printing plate 110 with the aqueous solution of amphiphilic molecules, whereby a full-surface layer of amphiphilic molecules is formed previous print image is deleted.
  • a cleaning unit 940 which z. B. with a brush washer the ink removed from the surface of the printing plate 110 (Alternatively, the printing ink can also be removed with a cloth washing device or via a washing device associated with an inking unit).
  • a imaging unit 950 which has an infrared laser, which writes a negative image on the printing plate 110 by infrared laser radiation and thus imaged, and optionally followed by a developing unit 960, the surface of the printing plate 110 z.
  • a developing unit 960 the surface of the printing plate 110 z.
  • dampening unit 970 and an inking unit 980 which provided the printing plate 110 with dampening solution and printing ink.
  • the printing forme 110 is thus available for reprinting after rinsing, proofing, rinsing, cleaning, imaging and hydrophilization.
  • the device 900 has a control unit 990 which via connections 995 drives at least the units 930 and 940 during a re-imaging operation, the control being designed such that the unit 930 operates in front of the unit 940, ie essentially before cleaning the printing form 110 of printing ink is assigned to the printing plate 110 with amphiphilic molecules in aqueous solution.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP20060101616 2005-03-09 2006-02-14 Procédé et appareil pour traitement d'une plaque d'impression réutilisable Not-in-force EP1700709B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510011192 DE102005011192A1 (de) 2005-03-09 2005-03-09 Verfahren und Vorrichtung zum Behandeln einer wiedergebilderbaren Druckform

Publications (3)

Publication Number Publication Date
EP1700709A2 true EP1700709A2 (fr) 2006-09-13
EP1700709A3 EP1700709A3 (fr) 2011-01-19
EP1700709B1 EP1700709B1 (fr) 2012-05-16

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Application Number Title Priority Date Filing Date
EP20060101616 Not-in-force EP1700709B1 (fr) 2005-03-09 2006-02-14 Procédé et appareil pour traitement d'une plaque d'impression réutilisable

Country Status (4)

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EP (1) EP1700709B1 (fr)
JP (1) JP4970809B2 (fr)
CN (1) CN1830682B (fr)
DE (1) DE102005011192A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918121A3 (fr) * 2006-10-18 2009-04-15 manroland AG Procédé de dissolution d'une forme imprimée

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7709185B2 (en) 2006-03-24 2010-05-04 Heidelberger Druckmaschinen Ag Method for imaging a lithographic printing form
DE102007057798B4 (de) 2006-12-20 2018-12-06 Heidelberger Druckmaschinen Ag Verfahren zum Behandeln einer drucktechnischen Oberfläche
ES2365885T3 (es) * 2008-03-31 2011-10-13 Agfa Graphics N.V. Un método para tratar una plancha de impresión litográfica.
DE102008022860A1 (de) * 2008-05-08 2009-12-10 Böhmer, Peter Arthur, Dipl.-Ing. (FH) Wiederverwendbare Offset-Druckplatte
DE102011106799A1 (de) * 2010-08-04 2012-02-09 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zum Wiederbebildern einer abgedruckten Druckform
DE102015202048B3 (de) * 2015-02-05 2016-02-25 Koenig & Bauer Ag Verfahren zum Bearbeiten einer Offsetdruckplatte und Offsetdruckmaschine

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0911154A1 (fr) 1997-10-24 1999-04-28 Fuji Photo Film Co., Ltd. Appareil pour la fabrication d'une plaque d'impression et imprimante et système d'impression utilisant cet appareil
EP0962333A1 (fr) 1997-02-06 1999-12-08 Star Micronics Co., Ltd. Appareil de formation d'image, procede de formation d'image et procede de fabrication de planche
DE10227054A1 (de) 2002-06-17 2003-12-24 Heidelberger Druckmasch Ag Wiederverwendbare Druckform

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US3647499A (en) * 1969-08-19 1972-03-07 Eastman Kodak Co Process for transferring dry developed electrographic images
US5030742A (en) * 1988-12-16 1991-07-09 Ciba-Geigy Corporation Ultrathin layers of palladium(O) complexes
DE19826377A1 (de) * 1998-06-12 1999-12-16 Heidelberger Druckmasch Ag Druckmaschine und Druckverfahren
JP2002002136A (ja) * 2000-06-26 2002-01-08 Fuji Photo Film Co Ltd 平版印刷版、平版印刷方法および平版印刷装置
JP2002001900A (ja) * 2000-06-26 2002-01-08 Fuji Photo Film Co Ltd 平版印刷方法、平版印刷版および平版印刷装置
DE10037998A1 (de) * 2000-08-04 2002-02-14 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Löschen einer wiederbebilderbaren Druckform
DE10206938A1 (de) * 2002-02-19 2003-09-04 Oce Printing Systems Gmbh Verfahren und Einrichtung zum Drucken, wobei eine hydrophile Schicht erzeugt und diese strukturiert wird
JP3897625B2 (ja) * 2002-03-25 2007-03-28 三菱重工業株式会社 印刷用版材の再生方法及び再生装置並びに印刷機
JP3868319B2 (ja) * 2002-03-22 2007-01-17 三菱重工業株式会社 印刷用版材の再生方法及び再生装置並びに印刷機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0962333A1 (fr) 1997-02-06 1999-12-08 Star Micronics Co., Ltd. Appareil de formation d'image, procede de formation d'image et procede de fabrication de planche
EP0911154A1 (fr) 1997-10-24 1999-04-28 Fuji Photo Film Co., Ltd. Appareil pour la fabrication d'une plaque d'impression et imprimante et système d'impression utilisant cet appareil
DE10227054A1 (de) 2002-06-17 2003-12-24 Heidelberger Druckmasch Ag Wiederverwendbare Druckform

Non-Patent Citations (1)

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918121A3 (fr) * 2006-10-18 2009-04-15 manroland AG Procédé de dissolution d'une forme imprimée

Also Published As

Publication number Publication date
JP4970809B2 (ja) 2012-07-11
CN1830682A (zh) 2006-09-13
CN1830682B (zh) 2012-01-11
EP1700709A3 (fr) 2011-01-19
JP2006248225A (ja) 2006-09-21
EP1700709B1 (fr) 2012-05-16
DE102005011192A1 (de) 2006-09-28

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