EP1151857B1 - Gesteuerte Bebilderung und Löschung einer Druckform aus metallischem Titan - Google Patents

Gesteuerte Bebilderung und Löschung einer Druckform aus metallischem Titan Download PDF

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Publication number
EP1151857B1
EP1151857B1 EP01109311A EP01109311A EP1151857B1 EP 1151857 B1 EP1151857 B1 EP 1151857B1 EP 01109311 A EP01109311 A EP 01109311A EP 01109311 A EP01109311 A EP 01109311A EP 1151857 B1 EP1151857 B1 EP 1151857B1
Authority
EP
European Patent Office
Prior art keywords
printing
printing form
offset printing
point
titanium
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
EP01109311A
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German (de)
English (en)
French (fr)
Other versions
EP1151857A3 (de
EP1151857A2 (de
Inventor
Bernd Vosseler
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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Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1151857A2 publication Critical patent/EP1151857A2/de
Publication of EP1151857A3 publication Critical patent/EP1151857A3/de
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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
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • 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

Definitions

  • the present invention relates to a reusable printing form, in particular for use in offset printing, with a printing surface and a method for imaging a reusable printing form with a printing surface.
  • the lithographic printing is based on utilizing the immiscibility of oil and water on the printing form, whereby the lipophilic solution or the ink or ink is captured by the image-forming areas and the water or hydrophilic solution by the non-image forming areas of the printing area.
  • the suitably prepared printing surface is wetted with hydrophilic and lipophilic substance or solution, especially water and ink or paint
  • the non-image areas preferentially retain the hydrophilic substance or solution and repel the lipophilic substances while the imagewise regions repel the lipophilic ones Take solution or ink or paint and repel the hydrophilic substances.
  • the lipophilic substance is then suitably transferred to the surface of a material on which the image is to be fixed, for example, paper, cloth, polymers and the like.
  • aluminum has been used as a substrate for printing plates.
  • the aluminum is first subjected to a graining process and then a subsequent anodization process.
  • the anodization serves to provide an anodic oxide layer whose adhesion is improved by the grain. Graining enhances the hydrophilic properties of the background of the printing plate.
  • a strong acid such as sulfuric or phosphoric acid is usually used to subsequently make the surface hydrophilic by another method such as a thermal silicization method or so-called electrosilication.
  • the aluminum support can be characterized as having a porous, demolition-resistant, hydrophilic surface, which is particularly adapted to lithographic printing, especially in the case of long print passes.
  • hydrophilic barrier layers in particular of polyvinyl phosphoric acid, polyacrylic acid, silicates, zirconates, or titanates.
  • a large number of radiation-sensitive materials are known which are suitable for generating images in the use of the lithographic printing process in that, after exposure and optionally required development and fixing, they provide an image-wise range which can be used for printing.
  • photopolymerizable substances can be used for this purpose.
  • the above-described arrangement is subjected to imagewise exposure by selectively supplying energy. This can be done for example by means of the exposure through a mask with UV light or by direct writing with a laser.
  • the lithographic printing plates of the type described above are usually treated with a developing solution, which is typically an aqueous alkaline solution with organic additives.
  • a developing solution typically an aqueous alkaline solution with organic additives.
  • oxide ceramics which are present for example in the form of coatings on a printing plate, are used.
  • zirconate in ceramic pure or provided with other additives form as the active material in the surface.
  • the surface is spotwise exposed to laser radiation, ie, melted, and is thereby converted from a hydrophilic, stoichiometric to a lipophilic, substoichiometric state. This conversion to the substoichiometric state is accomplished by ablation of small amounts of the surface of the ceramic.
  • the printing form can be erased by thermally oxidizing the surface.
  • oxide ceramics as a printing surface, however, has significant deficiencies. Since oxide ceramics are much harder and more brittle than metals, stresses occur in and between the layers, leading to detachment from the substrate, be it a metal substrate or a film, in particular a polymer. In particular, by bending the substrate may cause cracks and chipping.
  • the required temperatures are above the melting point of aluminum, which is used as a standard substrate of artwork, so that aluminum sheets can not be coated in this way.
  • Layers that are applied by plasma spraying are at least a few hundred microns thick and too rough and inhomogeneous to be used as a printing surface.
  • a printing plate In order to enable an even more economical printing with direct imaging printing machines in which the subject to be printed is imaged directly on a printing surface by means of a laser, or CtP systems (computer-to-plate systems), a printing plate must be used which can be deleted after printing and reprinted with another subject.
  • a gravure form of a nickel-titanium alloy which has a shape memory effect.
  • the gravure mold Before imaging, the gravure mold is subjected to plastic deformation by compression. In a selective heating, individual areas of the pressure surface return to their original height, while the unheated areas remain unchanged due to the low thermal conductivity of the nickel-titanium alloy, so that a relief-like structure for the gravure arises. Because the Gravure mold can be brought into their original shape by heating the entire work surface, the shape memory effect is repeatedly used. The gravure form is reusable.
  • the object of the present invention is to propose a material for the printing plate surface, which has better surface and processing properties, so that it is suitable for multiple printing of different images on the same printing surface. At the same time the costs are reduced.
  • a printing plate with a titanium-containing surface is proposed as the printing surface.
  • a titanium-containing surface is understood to mean a metallic surface which consists entirely of metallic titanium or a titanium-containing alloy.
  • the titanium content of the alloy ranges between 50 and 100%, preferably between 95 and 100%.
  • this surface may be the untreated surface of a sheet of either titanium or a titanium-containing alloy.
  • this surface may be formed as a thin layer which has been deposited on a support, such as a sheet, a plastic or a foil, by a suitable method, in particular by electroplating.
  • the titanium-containing surface may also be present in the form of a coating of a plate or a printing cylinder.
  • the titanium-containing surface changes its surface energy through a controlled supply of energy, such as by irradiation with electromagnetic energy and can be switched from a hydrophobic to a hydrophilic state.
  • the polar and dispersive components of the surface energy in the exposed or unexposed state differ significantly from one another, so that the wetting differences can be used for offset printing.
  • the metallic titanium surface according to the invention can thus be subjected to a controlled process for imaging and erasing.
  • Two symmetrical methods are available for this purpose: selective pointwise hydrophilization with large-area hydrophilization and selective point-wise hydrophobing with large-area hydrophilization.
  • a suitable laser or a light-emitting diode which emits in the ultraviolet spectral range, typically with a wavelength of less than 420 nm, is preferably used for this purpose.
  • the printing plate can be combined with various types of heat and / or water or aqueous solution Additives, especially alcohols, preferably isopopanol, are treated. It can then be dried with hot air.
  • pointwise hydrophilization can thus create an image be provided to the surface, which can be erased by large-scale hydrophobing.
  • a large-area hydrophilization is carried out.
  • a suitable light source typically a UV lamp
  • a light source in the infrared spectral range preferably a laser
  • an image can be provided on the surface by pointwise hydrophobing, which can be erased by extensive hydrophilization.
  • the inventive method for imaging and deletion can be carried out both inside and outside of the printing unit or the printing press.
  • An essential requirement is the imagewise exposure to radiation, for example, using ultraviolet light, which effectively converts the hydrophobic titanium layer or titanium-containing alloy layer to a hydrophilic state.
  • the printing surface can also be exposed directly with digital information, for example by means of a laser beam.
  • the laser equipped with a suitable control system can be used to write the background. Preference is given to lasers which emit in the ultraviolet spectral range.
  • the printing surface of the printing device is suitably cleaned of ink or ink.
  • the image can be deleted so that the printing surface can be reused.
  • the imaging and deletion can be performed multiple times, since the printing surface is extremely durable and long abrasion resistant.
  • the printing forme is in a preferred embodiment of an aluminum sheet, as it is used as a base material for conventional printing plates, deposited a metallic titanium layer, for example by electrochemical methods.
  • the coated sheet can then be clamped onto the plate cylinder of a direct imaging printing press.
  • the plate is first wetted with clean water, for example, with the help of an additional dampening unit and dried with hot air, so that it is placed in the hydrophobic state.
  • the imaging is now carried out with a suitable laser head of the direct imaging printing machine which emits ultraviolet radiation. The required intensities are significantly lower than in a thermal imaging, since the material is not heated, but only - comparable to a film - must be exposed.
  • the printing plate can now be printed like a conventional printing plate. After completion of an order, the plate then does not need to be changed, but must be restored only with water and hot air in the hydrophobic initial state.
  • the use of a metallic titanium-containing surface offers a number of advantages.
  • the metallic titanium coating of a sheet for the printing plate is less susceptible to bending than a printing plate having a ceramic surface.
  • the production of metallic layers is much easier than that of ceramic, since on processes such.
  • As galvanization can be used, which can be used over a large area.
  • the surface roughness can be adjusted via the surface finish of the carrier sheet and / or the plastic carrier to create optimal conditions for offset printing. Since no material is removed from the printing plate when switching from the hydrophobic to the hydrophilic state and back, the plate is repeatedly erasable and writable. Since the titanium surface itself is hydrophilic or hydrophobic, it is no longer absolutely necessary to use the relatively expensive and anodized aluminum described above as the base material, but it is also possible, for example, to use a cheap tinplate.
  • a printing device comprises a solid or monolithic printing cylinder, which consists partly or entirely of metallic titanium.
  • a printing plate which partly consists of metallic titanium
  • at least the outer pressure surface has such a composition.
  • a representative example of such a printing cylinder is shown in FIG.
  • a solid pressure cylinder 10 is made entirely of metallic titanium and has an outer pressure surface 12 of metallic titanium.
  • the cylinder 20 has a core 22, in particular of metal, of an alloy or a ceramic on which the metallic titanium surface has been applied as a layer or cladding 24 or deposited in a suitable manner, wherein an outer pressure surface 26 is provided.
  • the metallic titanium layer or cladding 24 may be a hollow cylindrical sleeve or a pressure jacket, as shown in FIG.
  • the sleeve 30 has a surface 32 made of a metallic titanium layer. The thickness of such sleeves varies in a wide range. In practical use, several centimeters have been proven.
  • the cores of such printing plates generally consist of one or more metals, such as ferrous metals, nickel, brass, copper or magnesium or alloys thereof, or of non-metallic materials.
  • the metal or alloy cores may be hollow or completely solid, or they may be one or more types of metal or alloys or non-metallic inorganic or organic materials.
  • the titanium-containing layer applied to the above-described cores or carriers generally has a uniform thickness of several microns.
  • the suitable carrier material 40 which consists of metal or a metal-containing alloy or ceramic, carries a layer which has a metallic titanium layer 42.
  • the area 44 is used for printing.
  • Such a plate can also be curved on a suitable printing unit or a suitable printing press, usually supported by rollers.
  • Fig. 5 is simplified and schematically illustrated the inventive method for imaging and erasing the printing form according to the invention.
  • the cylinder 50 carries a layer or sleeve or sheath 52 having the titanium-containing surface 54 which can be used for printing.
  • the surface is selectively supplied with pointwise energy from the light source 56 through the outgoing beam 58 or over a large area from the energy source 512 through the radiation sector 514.
  • this is a light source 56 which emits in the UV range and an energy source 512, in particular a heater for supplying heat.
  • an IR laser is provided for the light source 56, and a UV lamp is provided as the power source 512.
  • the water or aqueous solution 510 may aid in the process of hydrophobing.
  • Such a device can be realized inside or outside a printing unit or a printing press in this scheme of appropriate topology or with additional elements such as applicator rollers, optics and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Printing Methods (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP01109311A 2000-05-03 2001-04-12 Gesteuerte Bebilderung und Löschung einer Druckform aus metallischem Titan Expired - Lifetime EP1151857B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10021451A DE10021451A1 (de) 2000-05-03 2000-05-03 Gesteuerte Bebilderung und Löschung einer Druckform aus metallischem Titan
DE10021451 2000-05-03

Publications (3)

Publication Number Publication Date
EP1151857A2 EP1151857A2 (de) 2001-11-07
EP1151857A3 EP1151857A3 (de) 2001-11-14
EP1151857B1 true EP1151857B1 (de) 2006-06-28

Family

ID=7640591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01109311A Expired - Lifetime EP1151857B1 (de) 2000-05-03 2001-04-12 Gesteuerte Bebilderung und Löschung einer Druckform aus metallischem Titan

Country Status (5)

Country Link
US (1) US6520088B2 (enExample)
EP (1) EP1151857B1 (enExample)
JP (1) JP2001353974A (enExample)
AT (1) ATE331617T1 (enExample)
DE (2) DE10021451A1 (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000155422A (ja) * 1998-11-20 2000-06-06 Fuji Photo Film Co Ltd 平版印刷用原板及び平版印刷方法
DE10115435B8 (de) * 2001-03-29 2007-02-08 Maschinenfabrik Wifag Verfahren zur Erzeugung eines Druckbilds und/oder zur Löschung eines Druckbilds einer Nassoffset-Druckform mit fotothermisch veränderbarem Material
US20020189478A1 (en) * 2001-06-14 2002-12-19 Mitsubishi Heavy Industries, Ltd. Offset press
EP1266754A1 (en) * 2001-06-14 2002-12-18 Mitsubishi Heavy Industries, Ltd. Offset press and gapless printing plate
JP2003094599A (ja) * 2001-07-17 2003-04-03 Mitsubishi Heavy Ind Ltd インプリンタ装置
JP3609761B2 (ja) 2001-07-19 2005-01-12 三洋電機株式会社 半導体装置の製造方法
DE10227054B4 (de) * 2002-06-17 2013-01-03 Heidelberger Druckmaschinen Ag Wiederverwendbare Druckform, Druckwerk und Druckmaschine damit sowie Verfahren zur Bebilderung der Druckform
US6851366B2 (en) 2002-06-17 2005-02-08 Heidelberger Druckmaschinen Ag Reusable printing form
US7299749B2 (en) * 2003-02-10 2007-11-27 Fujifilm Corporation Lithographic printing plate support and production method thereof
EP1831029A1 (en) * 2004-12-22 2007-09-12 Hille & Müller GmbH & Co. Re-usable offset printing sheet and method for producing such a printing sheet
DE102006019801B4 (de) * 2006-04-28 2012-01-19 Koenig & Bauer Aktiengesellschaft Zylinder einer Rotationsdruckmaschine
DE102008022860A1 (de) 2008-05-08 2009-12-10 Böhmer, Peter Arthur, Dipl.-Ing. (FH) Wiederverwendbare Offset-Druckplatte
US20100101441A1 (en) * 2008-10-24 2010-04-29 Printing Research, Inc. Offset Printing Transfer Cylinder Base Cover with Alignment Stripes for Precision Installation of a Flexible Jacket Cover also with Alignment Stripes
US8578853B2 (en) * 2008-12-24 2013-11-12 Printing Research, Inc. Anti-marking jackets comprised of attachment structure and methods of using in offset printing
US8281716B2 (en) * 2008-12-24 2012-10-09 Printing Research, Inc. Anti-marking jackets comprised of fluoropolymer and methods of using in offset printing
US8220388B2 (en) * 2008-12-24 2012-07-17 Printing Research, Inc. Multiple layer anti-marking jackets and methods of using in offset printing
US8424453B2 (en) 2010-09-01 2013-04-23 Printing Research, Inc. Apparatus and method for adjusting anti-marking jackets
US8677899B2 (en) 2011-01-31 2014-03-25 Printing Research, Inc. Reversible anti-marking jackets and methods of using
US9346258B2 (en) 2012-05-02 2016-05-24 Printing Research, Inc. Method for cleaning anti-marking jackets

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU984878A1 (ru) * 1980-08-11 1982-12-30 за вители Ф. - ,. / с; Способ изготовлени печатной формы
US4718340A (en) * 1982-08-09 1988-01-12 Milliken Research Corporation Printing method
DE3938449A1 (de) * 1989-11-18 1991-05-23 Roland Man Druckmasch Druckwerk
US5868074A (en) * 1995-05-08 1999-02-09 Flex Products, Inc. Laser imageable direct-write printing member
US5743188A (en) 1995-10-20 1998-04-28 Eastman Kodak Company Method of imaging a zirconia ceramic surface to produce a lithographic printing plate
US5870955A (en) * 1997-03-05 1999-02-16 Presstek, Inc. Lithographic printing system with reusable support surfaces and lithographic constructions for use therewith
JPH11143055A (ja) * 1997-11-14 1999-05-28 Fuji Photo Film Co Ltd 平版印刷版の作成方法及び平版印刷用原版
US6079331A (en) * 1997-10-24 2000-06-27 Fuji Photo Film Co., Ltd. Plate making device and printer and printing system using the plate making device
US5927206A (en) * 1997-12-22 1999-07-27 Eastman Kodak Company Ferroelectric imaging member and methods of use
US5925496A (en) * 1998-01-07 1999-07-20 Eastman Kodak Company Anodized zirconium metal lithographic printing member and methods of use
JP2000155422A (ja) * 1998-11-20 2000-06-06 Fuji Photo Film Co Ltd 平版印刷用原板及び平版印刷方法

Also Published As

Publication number Publication date
US20010042469A1 (en) 2001-11-22
DE50110307D1 (de) 2006-08-10
EP1151857A3 (de) 2001-11-14
DE10021451A1 (de) 2001-11-08
US6520088B2 (en) 2003-02-18
JP2001353974A (ja) 2001-12-25
EP1151857A2 (de) 2001-11-07
ATE331617T1 (de) 2006-07-15

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