EP1125171B1 - Device for applying decors and/or characters on glass, glass ceramics and ceramics products - Google Patents

Device for applying decors and/or characters on glass, glass ceramics and ceramics products Download PDF

Info

Publication number
EP1125171B1
EP1125171B1 EP99971106A EP99971106A EP1125171B1 EP 1125171 B1 EP1125171 B1 EP 1125171B1 EP 99971106 A EP99971106 A EP 99971106A EP 99971106 A EP99971106 A EP 99971106A EP 1125171 B1 EP1125171 B1 EP 1125171B1
Authority
EP
European Patent Office
Prior art keywords
roller
glass
corona
product
transfer roller
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
EP99971106A
Other languages
German (de)
French (fr)
Other versions
EP1125171A1 (en
Inventor
Michael Zimmer
Waldemar Weinberg
Petra Auchter-Krummel
Dieter Jung
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.)
AGC Inc
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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
Priority claimed from DE1998149500 external-priority patent/DE19849500C2/en
Application filed by Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of EP1125171A1 publication Critical patent/EP1125171A1/en
Application granted granted Critical
Publication of EP1125171B1 publication Critical patent/EP1125171B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1625—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer on a base other than paper

Definitions

  • glass ceramic and ceramic products are on a large scale decorations to achieve desired aesthetic impressions. at certain such products must also have labels, Labels or the like are applied, e.g. the user to give the necessary information immediately.
  • the glass ceramic plates for cooktops which in addition to the Brand, e.g. CERANĀ®, also other operating and status information, as well as each according to customer requirements, especially colored decorations.
  • the first typical process uses ceramic paints relevant printing techniques directly on the glass and ceramic products printed on, the color first dried to smudge and then baked, where in the case of the mentioned ceramic plates for hobs the Color penetration typically takes place during the ceramization. In this case, the printing is not carried out on the finished glass ceramic plate, but already on the green body to be ceramized.
  • Screen printing process must first be made a screen printing template.
  • the sieve is made of fine-mesh textile or wire mesh, which over a print frame is stretched out at the non-image areas with one Cut paper, drawn in bold ink or photographically manufactured template covered.
  • the ceramic colors directly onto the glass or ceramic product applied.
  • the production of the screen printing stencil in the known The process is very complex and unprofitable for one-off productions. moreover with the help of a squeegee, the printing ink through the open areas of the Screen printing stencil can be applied manually or in screen printing machines.
  • the screen printing process is still a wet process in which with printing oil pasted, ceramic color pigments are used as printing ink, so that relatively large and expensive machines with dryers are necessary, and furthermore, in particular with regard to the manufacturing process there are major occupational health and safety and environmental problems.
  • the solvents in the pressure oil evaporate relatively easily that complex and expensive occupational safety measures have to be taken, and on the other hand separate filter systems are required.
  • several sequential printing processes for the different colors e.g. Cyan, magenta, yellow and black
  • the resolution of the applied colored print limited by the grid of the screen printing stencil.
  • the printed ceramic or glass products are common regarding the smoothness, the homogeneity and the resolution of the color printing are satisfactory.
  • the known method also allows the images to be applied in a simplified manner on the transfer agent.
  • the electrophotographic reproducing device e.g. one Laser printer
  • the user is advantageously the first time given, even with very small quantities to be made changes without additional effort, such as in the color gradation, the grid, make. Also everyone can use today's computer technology possible graphics and / or changes directly to the transfer medium be transmitted.
  • DE 197 18 303 C1 describes a method for producing a a colored picture or decor provided glass pane, on which on a Coloring pad a template of the multicolored picture or decor applied is made using a color scanner, image processing software and a color plotter in the form of an ink jet pen Reproduction device using stoving colors in the Ink jet pen is transferred to the glass pane. The angry Colors are then burned in at an elevated temperature.
  • This method has the disadvantage that the ink jet recorder on the Glass substrate applied colors already during application on the hydrophobic glass surface run, so that no sharp images or decorations can be applied.
  • the transfer of the toner image applied to the intermediate carrier onto the Glass or ceramic product is made in such a way that by appropriate Heaters once the intermediate support in the contact zone to the glass or Ceramic product heated to a temperature of at least 100 Ā° C and on the other hand, the glass ceramic product to a temperature of at least Is preheated to 60 Ā° C.
  • the toner is on the intermediate carrier brought into the molten state and the melted toner is then transferred to the glass or ceramic product.
  • the toner runs and with it the charge image somewhat, so that the sharpness of the contours also leaves something to be desired in this method.
  • JP 08-146819A describes a method for applying decorations and / or signs on glass, glass ceramic and ceramic products below Application of electrophotography and an associated device known become a sharply contoured image without the risk of residual images allows
  • JP 08-146 819 A is an intermediate carrier Endless belt provided.
  • Such an endless belt has a certain type Flexibility and is therefore subject to deformation due to contact with the Image roller and the product, is therefore not stable and therefore true to shape as it is for applying an undistorted, high tolerance requirements sufficient, in particular large-scale image on the product is necessary is.
  • the second corona on the product is next to the Contact zone between the endless belt and product arranged, whereby the electrostatic transmission of that on the endless belt Intermediate image on the product leaves something to be desired.
  • the invention is based on the object, starting from the above, device known from JP 08-146 819 A and initially referred to, to train them so that the application of an undistorted, high Tolerance requirements sufficient, especially large format image the product is possible.
  • the intermediate carrier is formed by a dimensionally stable transfer roller, and that the second Corona is located directly below the product in the contact zone.
  • the device is expediently so trained that below the product in the contact zone for Transfer roller in direct contact with the product a counter roller, formed as a hollow roller, is arranged in the interior or on the Surface in the area of the contact zone, the second corona is arranged, and that the first corona on the transfer roller in the contact zone to Image roller is arranged, and has a potential that is opposite to the charge of the toner image on the image roller, and that at the Transfer roller in the contact zone to the product another, third Corona is arranged, the opposite potential to the first and the second corona in the counter roll.
  • a counter roller formed as a hollow roller
  • This measure improves the transmission of electrostatic Toner image on the image roller on the transfer to the product given.
  • the Transfer roller is a hollow roller, inside of which at least one Corona is attached.
  • a transfer roller constructed in this way enables because of its electrical insulating core that the corons inside the transfer roller are arranged.
  • the electrostatic transmission processes take place here solely in the outer conductive layer, which is relatively soft and therefore good contact with solid, especially glassy products guaranteed.
  • the device is like this formed that the transfer roller designed as a hollow roller has a core made of metallic material, preferably aluminum, on which one first layer of insulating silicone is applied, and that on this Basic structure a relatively soft layer of electrically conductive silicone, EPDM or other suitable plastics or rubber compounds is applied, and that in each case outside the transfer roller in the Contact zone to the image roller the first, upper corona and in the contact zone to produce the third, lower corona with opposite potential is arranged.
  • the transfer roller designed as a hollow roller has a core made of metallic material, preferably aluminum, on which one first layer of insulating silicone is applied, and that on this Basic structure a relatively soft layer of electrically conductive silicone, EPDM or other suitable plastics or rubber compounds is applied, and that in each case outside the transfer roller in the Contact zone to the image roller the first, upper corona and in the contact zone to produce the third, lower corona with opposite potential is arranged.
  • the corons are because of the shielding Effect of the metallic core outside the transfer roller in the Contact areas arranged, which also in this embodiment play electrically effective processes in the conductive, soft layer, that of the metallic core through the first layer of insulating Material is electrically isolated, so that the electrostatic charge image forms only in the outer soft layer.
  • the layer of electrically conductive Material has a hardness in the range of 50 Shore A with a specific Internal resistance in the range of 10 kOhm / cm and a strength in the range of 5 mm. In principle, other values are also conceivable.
  • the layer of electrically conductive Material such as silicone with a very thin, conductive Teflon layer or covered by another suitable coating. This layer increases that Gliding ability without noticeably changing the electrostatic conditions would.
  • the one in the second embodiment of the transfer roller metallic core on this core applied first layer of insulating Material preferably has a thickness that is in the range of 2 mm. This layer thickness is sufficient for the electrical insulation of the outer, conductive Layer off and is not too bulky. However, the invention is not based on limits this value.
  • the device is like this formed that the counter-roller, preferably made of a metallic core Aluminum, on which a relatively soft layer of insulating Material such as silicone is applied, and this layer, like the comparable layer of the transfer roller, a hardness in the range of 50 Shore A and a thickness in the range of 5 mm.
  • the counter-roller preferably made of a metallic core Aluminum, on which a relatively soft layer of insulating Material such as silicone is applied, and this layer, like the comparable layer of the transfer roller, a hardness in the range of 50 Shore A and a thickness in the range of 5 mm.
  • FIG. 1 According to the basic illustration in Figure 1 are on a Conveyor belt 1 glass, glass ceramic or ceramic products 2, z. B. tiles or glass ceramic plates for hobs on which a decor and / or Inscriptions and / or markings, i.e. "Images" are applied should.
  • the shape of the decor to be applied or the text for the Lettering or labeling is done by means of a personal computer 3 an electro-copying device 4, whose basic structure is still will be explained in more detail.
  • the corresponding images can be originally from the computer in the context of corresponding graphic or text programs can be specified. It is however, it is also possible to apply the decorations or Lettering / markings from a template via a scanner in the Read computer; they can be modified there if necessary.
  • the electro-copying device 4 typically consists of an image roller 5, which is provided with a photoconductive layer which has a corresponding Exposure arrangement 6, for example by a controlled laser beam, exposed according to the decor to be applied or the lettering becomes.
  • ceramic toner as for example from the cited DE 44 13 168 C2 has become known, and in so far as the disclosure content of this Registration should belong, the latent on the image roller 5 electrostatic charge image developed into a visible toner image that then transferred to a transfer roller 7 with a flexible surface becomes.
  • the toner image of the transfer roller 7 is then applied directly to the glass or transfer ceramic product 2.
  • This transfer takes place under Using an electrostatic field created by applying a Voltage is generated on two so-called corons 9, 10, one of which Corona 9 inside the transfer roller 7 and the other corona 10 below the substrate 2 is arranged directly in the contact zone.
  • the Korons can in the simplest case, be formed by a wire.
  • the electrostatically transferred toner image is made using conventional methods branded on the product.
  • the transfer roller 7 for example, made of glass fiber reinforced Plastic (GRP), polyethylene or similar suitable materials be executed.
  • This transfer roller is advantageously hollow on the inside, so that coronas can be attached on the inside, which carry over the Make toner on the substrate.
  • GRP glass fiber reinforced Plastic
  • On the surface of the Transfer roller 7 has proven to be advantageous in itself known way to apply a layer of a material that the toner carries, but a residue-free transfer of the coronary discharge Allows toner.
  • the use of a silicone rubber has been advantageous here proven as coating material. But other materials can also be used with appropriate physical properties. By this coating also gives the surface of the transfer roller one certain elasticity, but not distortion of the transmission, what also has a positive effect on contact formation.
  • the measures according to the invention make it more surprising for the first time and advantageously managed by means of glass and electrophotography Ceramic products directly, i.e. without transfer funds in the sense of Decal technique, in particular with large decorations and / or To provide characters undistorted.
  • FIG. 2 one is constructive compared to the basic illustration in FIG. 1 illustrated embodiment of the invention. Are with the same or equivalent parts of Figure 1 with the same Provide reference number.
  • Glass, glass ceramic or ceramic products 2 e.g. Tiles or Glass ceramic plates for hobs, on which a decor and / or lettering and / or markings are to be applied.
  • the electro-copying device shown in Figure 2 for applying this Decor etc. also consists of two main assemblies, the electrophotographic system 4a and the transfer system 4b.
  • the electrophotographic system 4a contains a as a central component Image drum 5, an OPC photoconductor drum with a photoconductive Layer is provided, which has a corresponding, preferably digital designed exposure arrangement 6, for example by a controlled Laser beam, or more simply through an LED write head with a resolution of 400 dpi for example with a writing width of 36 "corresponding to the applied decor or the label is exposed. It arises thereby a "latent" electrostatic charge image in a known manner.
  • the electrophotographic system 4a further contains a developer unit 8a with a preferably ceramic, in particular 2-component, toner system, as known for example from the cited DE 44 13 168 C2 has become, by means of which the latent located on the image drum 5 electrostatic charge image is developed into a visible toner image.
  • a developer unit 8a contains, as in the electrophotographic Common method, a storage container 8 for the toner in connection with the usual means for applying the toner to the image drum 5.
  • the electrophotographic system 4a has a conventional cleaning and Erase unit 8b to remove the untransferred toner from the Remove drum 5.
  • Transfer roller 7 The resulting on the image drum 5 according to the image to be applied
  • the toner image is then transferred onto the product 2 by means of the transfer system 4 transfer.
  • This transfer system 4 has three main components that Transfer roller 7, several corons 9, 10, by means of which they are applied an electrostatic field to transmit the toner image can be generated, and ultimately a counter roller 11.
  • a core 7a is made of electrically insulating glass fiber or carbon fiber reinforced plastic (GFK / CFK) provided.
  • a relatively soft, about 5 mm thick layer 7b is made of this core 7a electrically conductive silicone, EPDM or other suitable plastics or rubber compounds applied, with a hardness of approx. 50 Shore A and a resistance of approx. 10 kOhm / cm. These values are exemplary without that the invention would be limited to this.
  • the surface is teflonized with a very thin and conductive layer, or provided with another suitable coating.
  • transfer roller 7 is opposite the contact line with the Image drum 5 a positive transfer corona 9 a1, opposite the contact line with the counter roller 11 a negative transfer corona 9 b1 arranged.
  • the coating applied to the core carries the toner on one side, but on the other hand, leaves a residue-free corona discharge Transfer the toner too.
  • the one already mentioned has been advantageous here Proven use of a conductive silicone rubber as a coating material.
  • the core 7 a consists of a metallic material, preferably aluminum.
  • An approximately 2 mm thick layer 7 c of insulating silicone or similar materials is applied to the core.
  • a relatively soft, approx. 5 mm thick layer 7 b of electrically conductive silicone or similar materials, as in the first embodiment, is applied to this basic structure, with a hardness of approx. 50 Ā° shore and a resistance of approx. 10 kOHM / cm.
  • the surface is also covered with a very thin and conductive layer teflon-coated or provided with another coating.
  • a very thin and conductive layer teflon-coated or provided with another coating is also covered with a very thin and conductive layer teflon-coated or provided with another coating.
  • the counter roll 11 has a core 11 a made of a metallic material, preferably made of aluminum. There is an approx. 5 mm thick on this core Layer 11 b of insulating silicone or a similar material applied, with a hardness of approx. 60 Shore A. These values are also only exemplary. Within the counter roller 11 is opposite to the contact line the transfer roller 7 arranged a positive transfer corona 10 a.
  • the toner image on the image drum 5, consisting of negative charged toner particles, is in the contact zone from that at this point by means of the transfer corona 9 a1 positively charged transfer roller 7 accepted.
  • the transfer roller 7 is coated with an electrically conductive material, different voltage potentials can also be achieved at different points on the surface.
  • the resistance value between the two transfer areas is, for example, in the range of approximately 150 kOhm.
  • the toner particles are in contact with the transfer roller 7 the continuous glass or ceramic body 2 transferred to this, because whose surface over the negative located in the counter roll 11 Transfer corona 10 a is positively charged.
  • the type of construction of the transfer roller 7 allows the setting of the necessary and different voltage potentials at the two transfer areas.
  • the surface of the transfer roller 7 is for cleaning the rest Toner particles very smooth by means of a corresponding device 12 designed. This is the preparation of the transfer roller 7 for the Transfer of the next charge image from the image drum 5 simplified and there is no risk of residual images arising in the following Figure would be dragged.
  • the electrostatically transferred toner image is processed using conventional Methods baked on the product 2.
  • the ceramic products decorated with the device according to the invention concern, as already mentioned in the main patent, especially those made of clay or mixtures of clay-shaped and fired products.
  • Other preferred ceramic products also include products from special ceramic materials such.
  • the ceramic products can be made from porcelain, earthenware, but also from special ceramic materials such as stearin, rutile, cordierite and cermets represent. The ceramic product can still be used before decorating a glaze, or the glaze can be after decorating be applied.
  • glass / glass ceramic products include all products made from a glass mass or products with a glass surface.
  • Glass / glass ceramic products consist of simple and composite silicates of sodium, potassium, calcium, magnesium, aluminum, barium, zinc and lead. These glasses were created by fiery flames, and the cooled melts consist essentially of silicon dioxide. Calcium oxide and sodium oxide, whereby special glasses can also contain larger amounts of boron trioxide, phosphorus pentoxide, barium oxide, potassium oxide, lithium oxide, zirconium oxide or lead oxide. Silicon dioxide, boron oxide and phosphorus pentoxide are the actual glass formers, which also form the basis of the enamel. Accordingly, the term "glass productā€ should also be understood to mean enamel products.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Glass Compositions (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Printing Methods (AREA)
  • Laminated Bodies (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Surface Treatment Of Glass (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

The device for applying decorations and characters on glass, glass ceramic or ceramic products includes an image roller (5) provided with an electrostatically chargeable photoconductive layer; a photo-exposure assembly (6) for generating an electrostatic charge image corresponding to at least one of decorations and characters to be applied; a supply container (8) for a toner with a device (8a) for developing the electrostatic charge image with the toner; a dimensionally stable transfer roller (7) for receiving the toner image, which is in direct contact with the image roller on one side and with the product (2) on its other side; at least two coronas (9, 10) including a first corona (9) arranged on the transfer roller (7) and a second corona (10) arranged under the product near the transfer roller (7) and a heater for burning the toner image onto the product, after electrostatically transferring the toner image to the product by means of the coronas.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Aufbringen von Dekors und/oder Zeichen auf Glas-, Glaskeramik- und Keramikerzeugnisse unter Anwendung der Elektrophotographie mit

  • einer Bildwalze, die eine elektrostatisch aufladbare photoleitfƤhige Schicht aufweist,
  • einer Belichtungsanordnung zur Erzeugung eines den aufzubringenden Dekors und/oder Zeichen entsprechenden elektrostatischen Ladungsbildes,
  • einem VorratsbehƤlter fĆ¼r vorzugsweise einen keramischen Toner in einer Einrichtung zum Entwickeln des elektrostatischen Ladungsbildes mit diesem Toner,
  • einem ZwischentrƤger, der einerseits im direkten Kontakt mit der Bildwalze steht und dabei so ausgebildet ist, daƟ er das Tonerbild aufnimmt, und der andererseits im direkten Kontakt mit dem Glas-, Glaskeramik- oder Keramikerkzeugnis steht,
  • mindestens zwei Koronen, von denen die erste am ZwischentrƤger und die zweite im Bereich der Kontaktzone des Erzeugnisses zum ZwischentrƤger angeordnet ist, und
  • mit Heizmitteln zum Einbrennen des mittels der Koronen elektrostatisch Ć¼bertragenen Tonerbildes auf dem Erzeugnis.
The invention relates to a device for applying decorations and / or characters to glass, glass ceramic and ceramic products using electrophotography
  • an image roller which has an electrostatically chargeable photoconductive layer,
  • an exposure arrangement for generating an electrostatic charge image corresponding to the decor and / or characters to be applied,
  • a storage container for preferably a ceramic toner in a device for developing the electrostatic charge image with this toner,
  • an intermediate carrier which is in direct contact with the image roller and is designed so that it takes up the toner image and which is in direct contact with the glass, glass ceramic or ceramic product,
  • at least two corons, the first of which is arranged on the intermediate carrier and the second in the region of the contact zone of the product with the intermediate carrier, and
  • with heating means for stoving the toner image electrostatically transferred by means of the corons onto the product.

Auf Glas-, Glaskeramik- und Keramikerzeugnisse werden im groƟen Umfang zur Erzielung gewĆ¼nschter Ƥsthetischer EindrĆ¼cke Dekors aufgebracht. Bei bestimmten derartigen Erzeugnissen mĆ¼ssen auch Beschriftungen, Kennzeichnungen oder dergleichen aufgebracht werden, um z.B. dem Benutzer unmittelbar die erforderliche Informationen zu geben. Als typisches Beispiel seien hier die Glaskeramikplatten fĆ¼r Kochfelder genannt, die neben der Marke, z.B. CERANĀ®, auch andere Bedien- und Zustandshinweise, sowie, je nach Kundenwunsch, auch insbesondere farbige Dekors aufweisen.On glass, glass ceramic and ceramic products are on a large scale decorations to achieve desired aesthetic impressions. at certain such products must also have labels, Labels or the like are applied, e.g. the user to give the necessary information immediately. As a typical example here are the glass ceramic plates for cooktops, which in addition to the Brand, e.g. CERANĀ®, also other operating and status information, as well as each according to customer requirements, especially colored decorations.

Zum Aufbringen derartiger Dekors und/oder Zeichen, zusammengefaƟt als "Bilder" bezeichnet, sind verschiedene Verfahren und Vorrichtungen bekannt geworden, von denen bisher zwei in der Praxis Bedeutung erlangt haben.To apply such decorations and / or characters, summarized as Designated "images", various methods and devices are known two of which have become important in practice.

Bei dem ersten typischen Verfahren werden Keramikfarben mittels einschlƤgiger Druck-Techniken direkt auf die Glas- und Keramikerzeugnisse aufgedruckt, die Farbe zunƤchst wischfest getrocknet und danach eingebrannt, wobei im Fall der erwƤhnten Glaskeramikplatten fĆ¼r Kochfelder der Farbeinbrand typischerweise wƤhrend der Keramisierung stattfindet. In diesem Fall erfolgt das Aufdrucken daher nicht auf die fertige Glaskeramikplatte, sondern bereits auf den zu keramisierenden GrĆ¼nling.The first typical process uses ceramic paints relevant printing techniques directly on the glass and ceramic products printed on, the color first dried to smudge and then baked, where in the case of the mentioned ceramic plates for hobs the Color penetration typically takes place during the ceramization. In this In this case, the printing is not carried out on the finished glass ceramic plate, but already on the green body to be ceramized.

Bei dem im allgemeinen fĆ¼r das vorgenannte Druckverfahren verwendeten Siebdruckverfahren muƟ zunƤchst eine Siebdruckschablone hergestellt werden. Dazu wird das Sieb aus feinmaschigem Textil- oder Drahtgewebe, das Ć¼ber einen Druckrahmen gespannt wird, an den bildfreien Stellen mit einer aus Papier geschnittenen, mit Fettusche gezeichneten oder photographisch hergestellten Schablone abgedeckt. Mittels dieser Siebdruckschablone werden dann die keramischen Farben auf das Glas- bzw. Keramikerzeugnis direkt aufgebracht. Die Herstellung der Siebdruckschablone bei dem bekannten Verfahren ist sehr aufwendig und fĆ¼r Einzelanfertigungen unrentabel. Zudem muƟ mit Hilfe einer Rakel die Druckfarbe durch die offenen Stellen der Siebdruckschablone manuell oder in Siebdruckmaschinen aufgebracht werden. Das Siebdruckverfahren ist weiterhin ein NaƟverfahren, bei dem mit Druckƶl angepastete, keramische Farbpigmente als Druckfarbe eingesetzt werden, so daƟ relativ groƟe und teuere Maschinen mit Trocknern notwendig sind, und weiterhin, insbesondere im Hinblick auf die beim HerstellungsprozeƟ benƶtigten Lƶsungsmittel groƟe Arbeitsschutz- und Umweltprobleme bestehen. Die in dem Druckƶl vorhandenen Lƶsungsmittel verdampfen relativ leicht, so daƟ aufwendige und teure ArbeitsschutzmaƟnahmen getroffen werden mĆ¼ssen, und zum anderen separate Filterungsanlagen erforderlich sind. Ɯberdies sind beim Siebdruckverfahren, wie auch beim Offsetdruckverfahren, mehrere hintereinander geschaltete DruckvorgƤnge fĆ¼r die verschiedenen Farben (z.B. Cyan, Magenta, Gelb und Schwarz) erforderlich, was weithin zu sehr groƟ ausgestalteten Anlagen fĆ¼hrt.In the generally used for the aforementioned printing process Screen printing process must first be made a screen printing template. For this purpose, the sieve is made of fine-mesh textile or wire mesh, which over a print frame is stretched out at the non-image areas with one Cut paper, drawn in bold ink or photographically manufactured template covered. Using this screen printing template then the ceramic colors directly onto the glass or ceramic product applied. The production of the screen printing stencil in the known The process is very complex and unprofitable for one-off productions. moreover with the help of a squeegee, the printing ink through the open areas of the Screen printing stencil can be applied manually or in screen printing machines. The screen printing process is still a wet process in which with printing oil pasted, ceramic color pigments are used as printing ink, so that relatively large and expensive machines with dryers are necessary, and furthermore, in particular with regard to the manufacturing process there are major occupational health and safety and environmental problems. The solvents in the pressure oil evaporate relatively easily that complex and expensive occupational safety measures have to be taken, and on the other hand separate filter systems are required. Moreover, are in the screen printing process, as well as in the offset printing process, several sequential printing processes for the different colors (e.g. Cyan, magenta, yellow and black) required, which is largely too large designed systems leads.

Desweiteren besteht bei dem bekannten Druckverfahren das Problem, daƟ die Reproduzierbarkeit der Farben bei einer grĆ¶ĆŸeren StĆ¼ckzahl nicht mehr gewƤhrleistet werden kann, und zudem bereits nach einer geringen StĆ¼ckzahl, d.h. in etwa nach 100 DruckvorgƤngen, die Siebdruckschablone gereinigt werden muƟ.Furthermore, there is the problem in the known printing method that the Reproducibility of the colors with a larger number of pieces no longer can be guaranteed, and also after a small number, i.e. after about 100 printing processes, the screen printing stencil is cleaned must become.

Zum anderen ist bei dem Siebdruckverfahren das Auflƶsungsvermƶgen des aufgebrachten Buntdrucks durch das Raster der Siebdruckschablone begrenzt. Dies fĆ¼hrt dazu, daƟ die bedruckten Keramik- oder Glaserzeugnisse hƤufig bezĆ¼glich der GlƤtte, der HomogenitƤt und der Auflƶsung des Farbdrucks nicht zufriedenstellend sind. Weiterhin mĆ¼ssen hƤufig, um eine gewĆ¼nschte GĆ¼te erzeugen zu kƶnnen, mehrere Sonderfarben verwendet werden. On the other hand, in the screen printing process, the resolution of the applied colored print limited by the grid of the screen printing stencil. As a result, the printed ceramic or glass products are common regarding the smoothness, the homogeneity and the resolution of the color printing are satisfactory. Furthermore, you often need to get a desired goodness to be able to generate, several spot colors can be used.

Bei dem zweiten typischen Verfahren werden Keramikfarben nicht direkt auf die Glas- und Keramikerzeugnisse aufgebracht, sondern auf ein Transfermittel, wie z.B. ein mit Gummi-Arabikum beschichtetes Papier. Dieses derart vorbereitete Transfermittel wird daraufhin auf das Keramik- oder Glaserzeugnis an gewĆ¼nschter Position aufgelegt und angefeuchtet, wodurch sich das Papier unter Belassung der Farben auf dem Erzeugnis entfernen lƤƟt. SchlieƟlich wird dann das Erzeugnis in an sich bekannter Weise gebrannt, was zu einer Verschmelzung der keramischen Farben mit dem Erzeugnis fĆ¼hrt. Es wird somit ebenfalls ein dauerhafter Druck auf dem Keramik- bzw. Glaserzeugnis erzielt.In the second typical process, ceramic colors are not applied directly the glass and ceramic products applied, but on a transfer medium, such as. a paper coated with gum arabic. This way prepared transfer agent is then on the ceramic or Glass product placed on the desired position and moistened, whereby the paper can be removed leaving the colors on the product. Finally, the product is then burned in a manner known per se, what leads to a fusion of the ceramic colors with the product. It permanent pressure on the ceramic or Glass product achieved.

Dieses zweite typische Verfahren arbeitet nach dem Prinzip des Abziehbildes. Es ist dabei bekannt, die Keramikfarben mittels einschlƤgiger Drucktechniken, insbesondere mittels Siebdruck, auf das Transfermittel zu bringen, mit den erlƤuterten Nachteilen der Siebdrucktechnik.This second typical process works on the decal principle. It is known to use ceramic printing techniques, especially by means of screen printing, to bring onto the transfer medium with the disadvantages of screen printing technology.

Es ist daher auch durch die DE 44 13 168 C2 bekannt geworden, anstelle Ć¼blicher Keramikdruckfarben einen neuartigen keramischen Toner zu verwenden, d.h. keramische Farbzusammensetzungen, die aus feinen Teilchen aus keramischen Pigmenten, FluƟmittel (Glas), Bindemittelharz(en) und Ć¼blichen Additiven bestehen und mittels eines elektrophotographischen Reproduktionsverfahrens (Elektrokopierverfahren) auf das Transfermittel aufgetragen werden. Unter Zuhilfenahme dieser MaƟnahmen gelingt es, ein Verfahren zu Herstellung von dekorierten Keramik- und Glaserzeugnissen zu schaffen, das die oben genannten Probleme der bekannten Druckverfahren Ć¼berwindet. Es kann ein dekoriertes Keramik- und Glaserzeugnis hergestellt werden, das hinsichtlich der Feinheit und Auflƶsung des Dekors (des Drucks) den bekannten Erzeugnissen Ć¼berlegen ist.It is therefore also known from DE 44 13 168 C2, instead conventional ceramic printing inks to a new type of ceramic toner use, i.e. ceramic color compositions consisting of fine particles made of ceramic pigments, flux (glass), binder resin (s) and Common additives exist and by means of an electrophotographic Reproduction process (electro copying process) on the transfer medium be applied. With the help of these measures, one succeeds Process for the production of decorated ceramic and glass products create that the above problems of the known printing process overcomes. A decorated ceramic and glass product can be made regarding the fineness and resolution of the decor (the print) is superior to known products.

Das bekannte Verfahren erlaubt auch ein vereinfachtes Aufbringen der Bilder auf das Transfermittel. Durch Einlesen der Daten des gewĆ¼nschten, auf dem Keramik- oder Glaserzeugnis aufzubringenden Bildes z.B. mittels eines digitalen Farbscanners oder durch Verwendung originƤrer Graphikdaten und Ɯbertragung dieser Daten mittels eines Personal Computers in den Bildspeicher der elektrophotographischen Reproduktionseinrichtung, z.B. eines Laserdruckers, wird vorteilhafterweise dem Benutzer erstmals die Mƶglichkeit gegeben, auch bei nur sehr geringen herzustellenden StĆ¼ckzahlen Ƅnderungen ohne zusƤtzlichen Aufwand, wie z.B. in der Farbabstufung, der Rasterung, vorzunehmen. Auch kƶnnen alle mittels der heutigen Computertechnologie mƶglichen Grafiken und/oder AbƤnderungen direkt auf das Tansfermittel Ć¼bertragen werden.The known method also allows the images to be applied in a simplified manner on the transfer agent. By reading the data of the desired one on the Ceramic or glass product image to be applied e.g. by means of a digital color scanner or by using original graphic data and Transfer of this data into the image memory using a personal computer the electrophotographic reproducing device, e.g. one Laser printer, the user is advantageously the first time given, even with very small quantities to be made changes without additional effort, such as in the color gradation, the grid, make. Also everyone can use today's computer technology possible graphics and / or changes directly to the transfer medium be transmitted.

Der entscheidende Nachteil dieses bekannten Verfahrens besteht darin, daƟ ein Transfermittel benƶtigt wird in Verbindung mit weiteren Verfahrensschritten, um das Bild von diesem Transfermittel auf das Glas- bzw. Keramikerzeugnis zu bringen. Abgesehen von dem Mehraufwand fĆ¼r die Herstellung der Bilder auf dem Erzeugnis besteht auch die Gefahr, daƟ die Bilder des angefeuchteten Transfermittels beim Aufbringen und Abziehen des TrƤgers verrutschen, wie das von Abziehbildern her hinlƤnglich bekannt ist, so daƟ die Bilder verzerrt aufgebracht werden, was dann nicht den Toleranzanforderungen an das farbige Produkt entspricht.The decisive disadvantage of this known method is that a Transfer agent is required in connection with further process steps, around the image of this transfer medium on the glass or ceramic product bring to. Apart from the additional effort for the production of the pictures there is also a danger on the product that the images of the moistened Transfer agent slip when applying and removing the carrier, such as which is well known from decals, so that the images are distorted be applied, which then does not meet the tolerance requirements for the colored Product corresponds.

Ein vergleichbares elektrophotographisches Reproduktionsverfahren zum Aufbringen von Bildern auf Kacheln unter Verwendung eines Transfermittels ist durch die WO 96/34319 bekannt geworden, fĆ¼r das die geschilderten Nachteile im gleichen MaƟ gelten.A comparable electrophotographic reproduction process for Applying images to tiles using a transfer agent is known from WO 96/34319, for which the described Disadvantages apply to the same extent.

Es sind auch aus der Patentliteratur Verfahren zum Aufbringen von Dekors und/oder Zeichen auf Glas-, Glaskeramik und Keramikerzeugnisse (Substrate) bekannt geworden, bei denen kein Transfermittel wie im Fall der Abziehbildmethode eingesetzt wird, d.h. bei denen die Dekors und/oder Zeichen direkt auf das Substrat aufgebracht werden. There are also methods for applying decorations from the patent literature and / or signs on glass, glass ceramics and ceramic products (substrates) become known for whom no transfer agent as in the case of Decal method is used, i.e. where the decorations and / or Characters can be applied directly to the substrate.

So beschreibt die DE 197 18 303 C1 ein Verfahren zum Herstellen einer mit einem farbigen Bild oder Dekor versehenen Glasscheibe, bei der auf einer Malunterlage eine Vorlage des mehrfarbigen Bildes oder Dekors aufgebracht wird, die mit Hilfe einer aus einem Farbscanner, Bildverarbeitungs-Software und einem Farbplotter in Form eines Tintenstrahlschreibers bestehenden Reproduktionseinrichtung unter Verwendung von Einbrennfarben im Tintenstrahlschreiber auf die Glasscheibe Ć¼bertragen wird. Die aufgebrachten Farben werden dann anschlieƟend bei erhƶhter Temperatur eingebrannt.For example, DE 197 18 303 C1 describes a method for producing a a colored picture or decor provided glass pane, on which on a Coloring pad a template of the multicolored picture or decor applied is made using a color scanner, image processing software and a color plotter in the form of an ink jet pen Reproduction device using stoving colors in the Ink jet pen is transferred to the glass pane. The angry Colors are then burned in at an elevated temperature.

Dieses Verfahren hat den Nachteil, daƟ die vom Tintenstrahlschreiber auf das Glassubstrat aufgebrachten Farben bereits wƤhrend des Aufbringens auf der hydrophoben GlasoberflƤche verlaufen, so daƟ keine konturenscharfe Bilder oder Dekors aufbringbar sind.This method has the disadvantage that the ink jet recorder on the Glass substrate applied colors already during application on the hydrophobic glass surface run, so that no sharp images or decorations can be applied.

Ferner beschreibt die EP 0 834 784 A 1 eine Vorrichtung zum Aufbringen von Dekors und/oder Zeichen auf Glas- oder Keramikerzeugnisse unter Anwendung der Elektrophotographie. Diese Vorrichtung besteht aus:

  • einer Bildwalze, die eine elektrostatisch aufladbare photoleitfƤhige Schicht aufweist,
  • einer Belichtungsanordnung zur Erzeugung eines dem aufzubringenden Dekors und/oder Zeichen entsprechenden elektrostatischen Ladungsbildes,
  • einem VorratsbehƤlter fĆ¼r einen keramischen Toner und Einrichtungen zum Entwickeln des elektrostatischen Ladungsbildes mit diesem Toner,
  • einem ZwischentrƤger in Form eines Endlosbandes oder einer Ɯbertragungswalze, der einerseits im direkten Kontakt mit der Bildwalze steht und das Tonerbild aufnimmt, und der andererseits im direkten Kontakt mit dem Glas- oder Keramikerzeugnis steht, um das Tonerbild vom ZwischentrƤger direkt auf das Glas- oder Keramikerzeugnis zu Ć¼bertragen.
Furthermore, EP 0 834 784 A1 describes a device for applying decorations and / or characters to glass or ceramic products using electrophotography. This device consists of:
  • an image roller which has an electrostatically chargeable photoconductive layer,
  • an exposure arrangement for generating an electrostatic charge image corresponding to the decor and / or sign to be applied,
  • a storage container for a ceramic toner and devices for developing the electrostatic charge image with this toner,
  • an intermediate carrier in the form of an endless belt or a transfer roller which, on the one hand, is in direct contact with the image roller and takes up the toner image and, on the other hand, is in direct contact with the glass or ceramic product, to transfer the toner image from the intermediate carrier directly onto the glass or ceramic product transferred to.

Die Ɯbertragung des auf dem ZwischentrƤger aufgebrachten Tonerbildes auf das Glas- oder Keramikerzeugnis erfolgt in der Weise, daƟ durch entsprechende Heizvorrichtungen einmal der ZwischentrƤger in der Kontaktzone zum Glas- oder Keramikerzeugnis auf eine Temperatur von mindestens 100Ā° C aufgeheizt und zum anderen das Glas-Keramikerzeugnis auf eine Temperatur von mindestens 60Ā° C vorgeheizt wird.The transfer of the toner image applied to the intermediate carrier onto the Glass or ceramic product is made in such a way that by appropriate Heaters once the intermediate support in the contact zone to the glass or Ceramic product heated to a temperature of at least 100 Ā° C and on the other hand, the glass ceramic product to a temperature of at least Is preheated to 60 Ā° C.

Bei dieser WƤrmeĆ¼bertragungs-Methode wird der Toner auf dem ZwischentrƤger in den geschmolzenen Zustand gebracht und der aufgeschmolzene Toner wird dann auf das Glas- oder Keramikerzeugnis Ć¼bertragen. Durch diesen Aufschmelzvorgang verlƤuft jedoch der Toner und damit das Ladungsbild etwas, so daƟ auch bei diesem Verfahren die KonturenschƤrfe zu wĆ¼nschen Ć¼brig lƤƟt. Ferner ist es nicht ohne weiteres mƶglich, den aufgeschmolzenen Toner von dem ZwischentrƤger vollstƤndig zu entfernen, so daƟ die Gefahr des Verschleppens von Restbildern besteht.With this heat transfer method, the toner is on the intermediate carrier brought into the molten state and the melted toner is then transferred to the glass or ceramic product. Through this Melting process, however, the toner runs and with it the charge image somewhat, so that the sharpness of the contours also leaves something to be desired in this method. Furthermore, it is not readily possible to remove the melted toner from the Completely remove the intermediate carrier, so that there is a risk of carryover of residual images.

Durch die JP 08-146819A ist ein Verfahren zum Aufbringen von Dekors und/oder Zeichen auf Glas-, Glaskeramik- und Keramikerzeugnisse unter Anwendung der Elektrophotographie sowie eine zugehƶrige Vorrichtung bekannt geworden, die eine konturenscharfe Abbildung ohne die Gefahr von Restbildern ermƶglichtJP 08-146819A describes a method for applying decorations and / or signs on glass, glass ceramic and ceramic products below Application of electrophotography and an associated device known become a sharply contoured image without the risk of residual images allows

Dieses bekannte Verfahren arbeitet mit den Schritten:

  • Belichten eines mit einer photoleitfƤhigen Schicht versehenen steifen TrƤgers entsprechend den aufzubringenden Dekors und/oder Zeichen unter Erzeugung eines entsprechenden latenten elektrostatischen Ladungsbildes,
  • Entwickeln dieses elektrostatischen Ladungsbildes mit einem Toner, der aus keramischen Pigmenten, umhĆ¼llt von einem Bindemittel besteht, zu einem korrespondierenden Tonerbild,
  • Ɯbertragen des Tonerbildes auf einen ZwischentrƤger,
  • Ɯbertragen des auf den ZwischentrƤger befindlichen Tonerbildes auf das Glas-, Glaskeramik- und Keramikerzeugnis mittels eines elektrostatischen Feldes, und
  • Einbrennen des elekrostatisch Ć¼bertragenen Tonerbildes.
This known method works with the steps:
  • Exposing a rigid support provided with a photoconductive layer in accordance with the decorations and / or characters to be applied, with the generation of a corresponding latent electrostatic charge image,
  • Developing this electrostatic charge image with a toner which consists of ceramic pigments, enveloped by a binder, to form a corresponding toner image,
  • Transferring the toner image onto an intermediate carrier,
  • Transferring the toner image located on the intermediate carrier onto the glass, glass ceramic and ceramic product by means of an electrostatic field, and
  • Burning in the electrostatically transferred toner image.

DurchgefĆ¼hrt wird dieses bekannte Verfahren durch eine Vorrichtung, mit

  • einer Bildwalze, die eine elektrostatisch aufladbare photoleitfƤhige Schicht aufweist,
  • einer Belichtungsanordnung zur Erzeugung eines den aufzubringenden Dekors und/oder Zeichen entsprechenden elektrostatischen Ladungsbildes,
  • einem VorratsbehƤlter fĆ¼r vorzugsweise einen keramischen Toner in einer Einrichtung zum Entwickeln des elektrostatischen Ladungsbildes mit diesem Toner,
  • einem ZwischentrƤger in Form eines Endlosbandes, das einerseits im direkten Kontakt mit der Bildwalze steht und dabei so ausgebildet ist, daƟ es das Tonerbild aufnimmt, und das andererseits im direkten Kontakt mit dem Glas-, Glaskeramik- oder Keramikerzeugnis steht,
  • mindestens zwei Koronen, von denen die erste am Endlosband und die zweite im Bereich der Kontaktzone des Erzeugnisses zum Endlosband angeordnet ist, und mit
  • Heizmitteln zum Einbrennen des mittels der Koronen elektrostatisch Ć¼bertragenen Tonerbildes auf dem Erzeugnis.
This known method is carried out by a device with
  • an image roller which has an electrostatically chargeable photoconductive layer,
  • an exposure arrangement for generating an electrostatic charge image corresponding to the decor and / or characters to be applied,
  • a storage container for preferably a ceramic toner in a device for developing the electrostatic charge image with this toner,
  • an intermediate carrier in the form of an endless belt which is in direct contact with the image roller on the one hand and is designed so that it takes up the toner image and on the other hand is in direct contact with the glass, glass ceramic or ceramic product,
  • at least two corons, the first of which is arranged on the endless belt and the second in the region of the contact zone of the product with the endless belt, and with
  • Heating means for baking the toner image electrostatically transferred on the product by means of the corons.

Im Fall der vorgenannten JP 08-146 819 A ist als ZwischentrƤger ein Endlosband vorgesehen. Ein derartiges Endlosband hat typbedingt eine gewisse FlexibilitƤt und unterliegt daher Verformungen durch den Kontakt mit der Bildwalze und dem Erzeugnis, ist daher nicht stabil und damit formtreu, wie es fĆ¼r das Aufbringen eines unverzerrten, hohen Toleranzanforderungen genĆ¼genden, insbesondere groƟflƤchigen Bildes auf das Erzeugnis notwendig ist.In the case of the aforementioned JP 08-146 819 A is an intermediate carrier Endless belt provided. Such an endless belt has a certain type Flexibility and is therefore subject to deformation due to contact with the Image roller and the product, is therefore not stable and therefore true to shape as it is for applying an undistorted, high tolerance requirements sufficient, in particular large-scale image on the product is necessary is.

Ferner ist im bekannten Fall die zweite Korona am Erzeugnis neben der Kontaktzone zwischen Endlosband und Erzeugnis angeordnet, wodurch die elektrostatische Ɯbertragung des auf dem Endlosband befindlichen Zwischenbildes auf das Erzeugnis zu wĆ¼nschen Ć¼brig lƤƟt.Furthermore, in the known case, the second corona on the product is next to the Contact zone between the endless belt and product arranged, whereby the electrostatic transmission of that on the endless belt Intermediate image on the product leaves something to be desired.

Der Erfindung liegt die Aufgabe zugrunde, ausgehend von der vorstehenden, aus der JP 08-146 819 A bekannten, und eingangs bezeichneten Vorrichtung, diese so auszubilden, daƟ das Aufbringen eines unverzerrten, hohen Toleranzanforderungen genĆ¼genden, insbesondere groƟformatigen Bildes auf das Erzeugnis mƶglich ist. The invention is based on the object, starting from the above, device known from JP 08-146 819 A and initially referred to, to train them so that the application of an undistorted, high Tolerance requirements sufficient, especially large format image the product is possible.

Diese Aufgabe wird erfindungsgemƤƟ dadurch gelƶst, daƟ der ZwischentrƤger durch eine formstabile Ɯbertragungswalze gebildet ist, und daƟ die zweite Korona unterhalb des Erzeugnisses direkt in der Kontaktzone angeordnet ist.This object is achieved in that the intermediate carrier is formed by a dimensionally stable transfer roller, and that the second Corona is located directly below the product in the contact zone.

Um ein entsprechend unverzerrtes, hohen Toleranzanforderungen genĆ¼gendes Bild auf das Erzeugnis, insbesondere auf groƟformatige Erzeugnisse (0,25 m2) zu Ć¼bertragen, kommt es darauf an, eine mƶglichst formtreue/stabile Ausbildung des ZwischentrƤgermediums zu erreichen. Das gelingt erfindungsgemƤƟ am besten durch die Verwendung eines rotationssymmetrischen steifen Kƶrpers, der Ɯbertragungswalze. Dieser unterliegt nicht den Verformungen wie das Endlosband.In order to transfer a correspondingly undistorted, high tolerance requirement image to the product, in particular to large-format products (0.25 m 2 ), it is important to achieve a shape of the intermediate carrier medium that is as true to shape as possible. According to the invention, this is best achieved by using a rotationally symmetrical rigid body, the transfer roller. This is not subject to the deformations like the endless belt.

Dadurch, daƟ die zweite Korona unterhalb des Erzeugnisses direkt in der Kontaktzone zwischen Ɯbertragungswalze und Erzeugnis angeordnet ist, wird die elektrostatische Ɯbertragung des auf dem Endlosband befindlichen Zwischenbildes auf das Erzeugnis signifikant verbessert.The fact that the second corona below the product directly in the Contact zone between the transfer roller and the product is arranged the electrostatic transmission of that on the endless belt Intermediate image on the product significantly improved.

GemƤƟ einer Weiterbildung der Erfindung ist die Vorrichtung zweckmƤƟig so ausgebildet, daƟ unterhalb des Erzeugnisses in der Kontaktzone zur Ɯbertragungswalze im direkten Kontakt mit dem Erzeugnis eine Gegenwalze, ausgebildet als Hohlwalze, angeordnet ist, in deren Inneren oder an deren OberflƤche im Bereich der Kontaktzone die zweite Korona angeordnet ist, und daƟ die erste Korona an der Ɯbertragungswalze in der Kontaktzone zur Bildwalze angeordnet ist, und ein Potential aufweist, das entgegengesetzt zu der Ladung des Tonerbildes auf der Bildwalze ist, und daƟ an der Ɯbertragungswalze in der Kontaktzone zum Erzeugnis eine weitere, dritte Korona angeordnet ist, die entgegengesetztes Potential zu der ersten und der zweiten Korona in der Gegenwalze hat. According to a development of the invention, the device is expediently so trained that below the product in the contact zone for Transfer roller in direct contact with the product a counter roller, formed as a hollow roller, is arranged in the interior or on the Surface in the area of the contact zone, the second corona is arranged, and that the first corona on the transfer roller in the contact zone to Image roller is arranged, and has a potential that is opposite to the charge of the toner image on the image roller, and that at the Transfer roller in the contact zone to the product another, third Corona is arranged, the opposite potential to the first and the second corona in the counter roll.

Durch diese MaƟnahme ist eine verbesserte Ɯbertragung des elektrostatischen Tonerbildes auf der Bildwalze Ć¼ber die Ɯbertragung auf das Erzeugnis gegeben.This measure improves the transmission of electrostatic Toner image on the image roller on the transfer to the product given.

FĆ¼r eine optimierte Ɯbertragung des Tonerbildes auf das Erzeugnis kommt, neben einer optimalen Anordnung der Koronen, auch der Ausbildung der Ɯbertragungswalze eine entscheidende Bedeutung bei, einmal, weil sie im direkten Kontakt mit den harten glasigen Erzeugnissen steht und zum anderen, weil der fĆ¼r sie verwendete Werkstoff die elektrostatischen Felder, die fĆ¼r die Ɯbertragung des geladenen Tonerbildes maƟgebend sind, beeinfluƟt.For an optimized transfer of the toner image onto the product, in addition to an optimal arrangement of the corons, also the formation of the Transfer roller is of crucial importance, once because it is in the is in direct contact with the hard glassy products and secondly, because the material used for them is the electrostatic fields required for the Transfer of the loaded toner image are decisive.

Zur ErfĆ¼llung dieser Bedingungen ist es fƶrderlich, wenn die Ɯbertragungswalze eine Hohlwalze ist, in deren Innern mindestens eine Korona angebracht ist.To meet these conditions, it is beneficial if the Transfer roller is a hollow roller, inside of which at least one Corona is attached.

GemƤƟ einer ersten Weiterbildung der Erfindung ist dabei die Vorrichtung so getroffen, daƟ die als Hohlwalze ausgebildete Ɯbertragungswalze einen elektrisch isolierenden Kern aus Kunststoff, vorzugsweise einem glasfaseroder kohlefaserverstƤrktem Kunststoff aufweist, und auf dem Kern eine relativ weiche Schicht aus elektrisch leitfƤhigem Silikon, EPDM oder anderen geeigneten Kunststoffen bzw. Gummimischungen aufgebracht ist, und daƟ im Innern der Ɯbertragungswalze einmal in der Kontaktzone zur Bildwalze die erste, obere Korona und zum anderen in der Kontaktzone zum Erzeugnis die dritte, untere Korona mit entgegengesetztem Potential angeordnet ist.According to a first development of the invention, the device is like this made that the transfer roller designed as a hollow roller electrically insulating core made of plastic, preferably a glass fiber or has carbon fiber reinforced plastic, and on the core a relative soft layer made of electrically conductive silicone, EPDM or others suitable plastics or rubber mixtures is applied, and that in Inside the transfer roller once in the contact zone to the image roller first, upper corona and second in the contact zone to the product the third, lower corona is arranged with opposite potential.

Eine derartig aufgebaute Ɯbertragungswalze ermƶglicht wegen ihres elektrisch isolierenden Kernes, daƟ die Koronen im Innern der Ɯbertragungswalze angeordnet sind. Die elektrostatischen ƜbertragungsvorgƤnge spielen sich dabei allein in der ƤuƟeren, leitfƤhigen Schicht ab, die relativ weich ist und daher einen guten Kontakt zu den festen, insbesondere glasigen Erzeugnissen gewƤhrleistet. A transfer roller constructed in this way enables because of its electrical insulating core that the corons inside the transfer roller are arranged. The electrostatic transmission processes take place here solely in the outer conductive layer, which is relatively soft and therefore good contact with solid, especially glassy products guaranteed.

GemƤƟ einer zweiten Weiterbildung der Erfindung ist die Vorrichtung so ausgebildet, daƟ die als Hohlwalze ausgebildete Ɯbertragungswalze einen Kern aus metallischem Werkstoff, vorzugsweise Aluminium, aufweist, auf dem eine erste Schicht aus isolierendem Silikon aufgebracht ist, und daƟ auf diesen Grundaufbau eine relativ weiche Schicht aus elektrisch leitfƤhigem Silikon, EPDM oder anderen geeigneten Kunststoffen bzw. Gummimischungen aufgebracht ist, und daƟ jeweils auƟerhalb der Ɯbertragungswalze in der Kontaktzone zur Bildwalze die erste, obere Korona und in der Kontaktzone zum Erzeugnis die dritte, untere Korona mit entgegengesetztem Potential angeordnet ist.According to a second development of the invention, the device is like this formed that the transfer roller designed as a hollow roller has a core made of metallic material, preferably aluminum, on which one first layer of insulating silicone is applied, and that on this Basic structure a relatively soft layer of electrically conductive silicone, EPDM or other suitable plastics or rubber compounds is applied, and that in each case outside the transfer roller in the Contact zone to the image roller the first, upper corona and in the contact zone to produce the third, lower corona with opposite potential is arranged.

Bei einer derartigen Ausbildung sind die Koronen wegen des abschirmenden Effektes des metallischen Kernes auƟerhalb der Ɯbertragungswalze in den Kontaktbereichen angeordnet, wobei auch bei dieser AusfĆ¼hrungsform sich die elektrisch wirksamen VorgƤnge in der leitfƤhigen, weichen Schicht abspielen, die von dem metallischen Kern durch die erste Schicht aus isolierendem Material elektrisch isoliert ist, so daƟ sich das elektrostatische Ladungsbild allein in der ƤuƟeren weichen Schicht ausbildet.With such a design, the corons are because of the shielding Effect of the metallic core outside the transfer roller in the Contact areas arranged, which also in this embodiment play electrically effective processes in the conductive, soft layer, that of the metallic core through the first layer of insulating Material is electrically isolated, so that the electrostatic charge image forms only in the outer soft layer.

Gute Ergebnisse sowohl hinsichtlich der Elektrostatik als auch hinsichtlich des Kontaktes mit den harten glasigen Erzeugnissen werden erzielt, wenn gemƤƟ einer Ausgestaltung der Erfindung die Schicht aus elektrisch leitfƤhigem Material eine HƤrte im Bereich von 50 Shore A mit einem spezifischen Innenwiderstand im Bereich von 10 kOhm/cm sowie eine StƤrke im Bereich von 5 mm aufweist. Auch andere Werte sind grundsƤtzlich denkbar.Good results both in terms of electrostatics and in terms of Contact with the hard glassy products is achieved when according to an embodiment of the invention, the layer of electrically conductive Material has a hardness in the range of 50 Shore A with a specific Internal resistance in the range of 10 kOhm / cm and a strength in the range of 5 mm. In principle, other values are also conceivable.

Um den Abrieb der Ɯbertragungswalze zu minimieren, ist dabei gemƤƟ einer weiteren Ausgestaltung der Erfindung die Schicht aus elektrisch leitfƤhigem Material, wie Silikon, mit einer sehr dĆ¼nnen, leitfƤhigen Teflonschicht oder einer anderen geeigneten Beschichtung abgedeckt. Diese Schicht erhƶht das Gleitvermƶgen, ohne daƟ sie die elektrostatischen VerhƤltnisse merklich Ƥndern wĆ¼rde.In order to minimize the abrasion of the transfer roller, according to one Another embodiment of the invention, the layer of electrically conductive Material such as silicone with a very thin, conductive Teflon layer or covered by another suitable coating. This layer increases that Gliding ability without noticeably changing the electrostatic conditions would.

Die bei der zweiten AusfĆ¼hrungsform der Ɯbertragungswalze mit einem metallischen Kern auf diesem Kern aufgebrachte erste Schicht aus isolierendem Material besitzt vorzugsweise eine Dicke, die im Bereich von 2 mm liegt. Diese Schichtdicke reicht fĆ¼r die elektrische Isolierung der ƤuƟeren, leitfƤhigen Schicht aus und trƤgt nicht zu sehr auf. Die Erfindung ist jedoch nicht auf diesen Wert begrenzt.The one in the second embodiment of the transfer roller metallic core on this core applied first layer of insulating Material preferably has a thickness that is in the range of 2 mm. This layer thickness is sufficient for the electrical insulation of the outer, conductive Layer off and is not too bulky. However, the invention is not based on limits this value.

GemƤƟ einer weiteren Ausbildung der Erfindung ist die Vorrichtung so ausgebildet, daƟ die Gegenwalze einen metallischen Kern, vorzugsweise aus Aluminium, aufweist, auf dem eine relativ weiche Schicht aus isolierendem Material wie Silikon aufgebracht ist, wobei auch diese Schicht, wie die vergleichbare Schicht der Ɯbertragungswalze, eine HƤrte im Bereich von 50 Shore A sowie eine StƤrke im Bereich von 5 mm aufweist. Eine derartige Ausbildung trƤgt sowohl den elektrostatischen als auch den mechanischen Bedingungen Rechnung, wobei die Erfindung nicht auf diese Werte beschrƤnkt ist.According to a further embodiment of the invention, the device is like this formed that the counter-roller, preferably made of a metallic core Aluminum, on which a relatively soft layer of insulating Material such as silicone is applied, and this layer, like the comparable layer of the transfer roller, a hardness in the range of 50 Shore A and a thickness in the range of 5 mm. Such one Training bears both electrostatic and mechanical Conditions account, the invention is not limited to these values is.

Anhand von zwei in den Zeichnungen dargestellten AusfĆ¼hrungsbeispielen der erfindungsgemƤƟen Vorrichtung wird die Erfindung nƤher beschrieben.Using two exemplary embodiments shown in the drawings The device according to the invention is described in more detail.

Es zeigen:

Figur 1
in einer schematischen Darstellung das Grundprinzip der erfindungsgemƤƟen Vorrichtung,
Figur 2
in einer schematisierten Schnittdarstellung eine konkrete AusfĆ¼hrungsform der erfindungsgemƤƟen Vorrichtung mit zwei Varianten hinsichtlich der Ɯbertragungswalze der Koronaanordnung.
Show it:
Figure 1
in a schematic representation the basic principle of the device according to the invention,
Figure 2
in a schematic sectional view, a specific embodiment of the device according to the invention with two variants with regard to the transfer roller of the corona arrangement.

GemƤƟ der prinzipiellen Darstellung in Figur 1 befinden sich auf einem Fƶrderband 1 Glas-, Glaskeramik- oder Keramikerzeugnisse 2, z. B. Kacheln oder Glaskeramikplatten fĆ¼r Kochfelder, auf die ein Dekor und/oder Beschriftungen und/oder Kennzeichnungen, d.h. "Bilder" aufgebracht werden sollen. Die Gestalt des aufzubringenden Dekors bzw. der Text fĆ¼r die Beschriftung oder der Kennzeichnung wird mittels eines Personal-Computers 3 einer Elektrokopier-Einrichtung 4 zugefĆ¼hrt, deren prinzipieller Aufbau noch nƤher erlƤutert werden wird.According to the basic illustration in Figure 1 are on a Conveyor belt 1 glass, glass ceramic or ceramic products 2, z. B. tiles or glass ceramic plates for hobs on which a decor and / or Inscriptions and / or markings, i.e. "Images" are applied should. The shape of the decor to be applied or the text for the Lettering or labeling is done by means of a personal computer 3 an electro-copying device 4, whose basic structure is still will be explained in more detail.

Die entsprechenden Bilder kƶnnen vom Computer originƤr im Rahmen von entsprechenden graphischen oder Textprogrammen vorgegeben werden. Es ist jedoch auch mƶglich, die aufzubringenden Dekors bzw. Beschriftung/Kennzeichnungen aus einer Vorlage Ć¼ber einen Scanner in den Computer einzulesen; sie kƶnnen dort ggf. noch modifiziert werden.The corresponding images can be originally from the computer in the context of corresponding graphic or text programs can be specified. It is however, it is also possible to apply the decorations or Lettering / markings from a template via a scanner in the Read computer; they can be modified there if necessary.

Die Elektrokopier-Einrichtung 4 besteht typischerweise aus einer Bildwalze 5, die mit einer photoleitfƤhigen Schicht versehen ist, die Ć¼ber eine entsprechende Belichtungsanordnung 6, beispielsweise durch einen gesteuerten Laserstrahl, entsprechend dem aufzubringenden Dekor bzw. der Beschriftung belichtet wird. Es entsteht dadurch in bekannter Weise ein "latentes" elektrostatisches Ladungsbild. Mittels eines aus einem VorratsbehƤlter 8 zugefĆ¼hrten keramischen Toners, wie er beispielsweise aus der zitierten DE 44 13 168 C2 bekannt geworden ist, und die insoweit zum Offenbarungsinhalt dieser Anmeldung gehƶren soll, wird das auf der Bildwalze 5 befindliche latente elektrostatische Ladungsbild zu einem sichtbaren Tonerbild entwickelt, das anschlieƟend auf eine Ɯbertragungswalze 7 mit flexibler OberflƤche Ć¼bertragen wird. Danach wird das Tonerbild der Ɯbertragungswalze 7 direkt auf das Glas- bzw. Keramikerzeugnis 2 Ć¼bertragen. Diese Ɯbertragung erfolgt unter Zuhilfenahme eines elektrostatischen Feldes, das durch Anlegen einer Spannung an zwei sogenannten Koronen 9, 10 erzeugt wird, von denen eine Korona 9 innerhalb der Ɯbertragungswalze 7 und die andere Korona 10 unter dem Substrat 2 direkt in der Kontaktzone angeordnet ist. Die Koronen kƶnnen im einfachsten Fall durch einen Draht gebildet werden.The electro-copying device 4 typically consists of an image roller 5, which is provided with a photoconductive layer which has a corresponding Exposure arrangement 6, for example by a controlled laser beam, exposed according to the decor to be applied or the lettering becomes. This creates a "latent" electrostatic in a known manner Charge image. By means of a feed from a storage container 8 ceramic toner, as for example from the cited DE 44 13 168 C2 has become known, and in so far as the disclosure content of this Registration should belong, the latent on the image roller 5 electrostatic charge image developed into a visible toner image that then transferred to a transfer roller 7 with a flexible surface becomes. The toner image of the transfer roller 7 is then applied directly to the glass or transfer ceramic product 2. This transfer takes place under Using an electrostatic field created by applying a Voltage is generated on two so-called corons 9, 10, one of which Corona 9 inside the transfer roller 7 and the other corona 10 below the substrate 2 is arranged directly in the contact zone. The Korons can in the simplest case, be formed by a wire.

Danach wird das elektrostatisch Ć¼bertragene Tonerbild mit Ć¼blichen Methoden auf dem Erzeugnis eingebrannt.Thereafter, the electrostatically transferred toner image is made using conventional methods branded on the product.

Durch das erzeugte elektrostatische Feld wird das auf der Ɯbertragungswalze 7 befindliche Tonerbild sehr exakt auf das Substrat 2 Ć¼bertragen. Versuche haben dabei gezeigt, daƟ dies rĆ¼ckstandslos erfolgt, so daƟ die Aufbereitung der Ɯbertragungswalze 7 fĆ¼r das Ɯbertragen des nƤchsten Ladungsbildes von der Bildwalze 5 vereinfacht ist und keine Gefahr fĆ¼r das Entstehen von Restbildern, die in die folgende Abbildung verschleppt werden, gegeben ist.The electrostatic field that is generated on the transfer roller 7 located toner image transferred very precisely to the substrate 2. Have attempts shown that this takes place without residue, so that the preparation of the Transfer roller 7 for transferring the next charge image from the Image roller 5 is simplified and no risk of arising Residual images, which are dragged into the following figure, is given.

Die Ɯbertragungswalze 7, kann beispielhaft aus glasfaserverstƤrktem Kunststoff (GFK), Polyethylen oder Ƥhnlichen geeigneten Materialien ausgefĆ¼hrt sein. Diese Ɯbertragungswalze ist vorteilhaft innen hohl ausgefĆ¼hrt, damit innenliegend Koronen angebracht werden kƶnnen, die den Ɯbertrag des Toners auf das Substrat bewerkstelligen. Auf der OberflƤche der Ɯbertragungswalze 7 hat es sich als vorteilhaft erwiesen, auf an sich bekanntem Weg eine Schicht aus einem Material aufzubringen, das den Toner trƤgt, aber bei der Koronenentladung eine rĆ¼ckstandslose Ɯbertragung des Toners zulƤƟt. Hier hat sich vorteilhaft die Verwendung eines Silikongummis als Beschichtungsmaterial erwiesen. Es kƶnnen aber auch andere Materialien mit entsprechenden physikalischen Eigenschaften eingesetzt werden. Durch diese Beschichtung erhƤlt die OberflƤche der Ɯbertragungswalze auch eine gewisse, jedoch keine Verzerrung der Ɯbertragung bewirkende ElastizitƤt, was sich auch gĆ¼nstig hinsichtlich der Kontaktbildung auswirkt.The transfer roller 7, for example, made of glass fiber reinforced Plastic (GRP), polyethylene or similar suitable materials be executed. This transfer roller is advantageously hollow on the inside, so that coronas can be attached on the inside, which carry over the Make toner on the substrate. On the surface of the Transfer roller 7 has proven to be advantageous in itself known way to apply a layer of a material that the toner carries, but a residue-free transfer of the coronary discharge Allows toner. The use of a silicone rubber has been advantageous here proven as coating material. But other materials can also be used with appropriate physical properties. By this coating also gives the surface of the transfer roller one certain elasticity, but not distortion of the transmission, what also has a positive effect on contact formation.

Der Aufbau und die Wirkungsweise der Bildwalze 5 und der Tonerzufuhr 8, die die wesentlichen Komponenten der Elektrophotographie bzw. der Xerographie darstellen, sind grundsƤtzlich bekannt und brauchen daher hier im einzelnen nicht nƤher erlƤutert zu werden.The structure and operation of the image roller 5 and the toner supply 8, which are the essential components of electrophotography or Representing xerography are generally known and therefore need here not to be explained in detail.

Durch die erfindungsgemƤƟen MaƟnahmen ist es erstmals in Ć¼berraschender und vorteilhafter Weise gelungen, mit Mitteln der Elektrophotographie Glasund Keramikerzeugnisse direkt, d.h. ohne Transfermittel im Sinne der Abziehbildtechnik, mit insbesondere auch groƟflƤchigen Dekors und/oder Zeichen unverzerrt zu versehen.The measures according to the invention make it more surprising for the first time and advantageously managed by means of glass and electrophotography Ceramic products directly, i.e. without transfer funds in the sense of Decal technique, in particular with large decorations and / or To provide characters undistorted.

In der Figur 2 ist eine gegenĆ¼ber der Prinzipdarstellung in Figur 1 konstruktiv nƤher ausgestaltete AusfĆ¼hrungsform der Erfindung dargestellt. Dabei sind mit der Figur 1 Ć¼bereinstimmende oder gleichwirkende Teile mit derselben Bezugsziffer versehen.In FIG. 2, one is constructive compared to the basic illustration in FIG. 1 illustrated embodiment of the invention. Are with the same or equivalent parts of Figure 1 with the same Provide reference number.

Auf dem Fƶrderband 1, angetrieben durch Fƶrderwalzen 1 a, befinden sich die Glas-, Glaskeramik- oder Keramikerzeugnisse 2, z.B. Kacheln oder Glaskeramikplatten fĆ¼r Kochfelder, auf die ein Dekor und/oder Beschriftungen und/oder Kennzeichnungen aufgebracht werden sollen.On the conveyor belt 1, driven by conveyor rollers 1 a, are Glass, glass ceramic or ceramic products 2, e.g. Tiles or Glass ceramic plates for hobs, on which a decor and / or lettering and / or markings are to be applied.

Die in Figur 2 dargestellte Elektrokopier-Einrichtung zum Aufbringen dieser Dekors etc. besteht ebenfalls aus zwei Hauptbaugruppen, dem elektrophotographischen System 4a und dem Transfersystem 4b.The electro-copying device shown in Figure 2 for applying this Decor etc. also consists of two main assemblies, the electrophotographic system 4a and the transfer system 4b.

Das elektrophotographische System 4a enthƤlt als zentralen Bestandteil eine Bildtrommel 5, eine OPC-Fotoleitertrommel, die mit einer photoleitfƤhigen Schicht versehen ist, die Ć¼ber eine entsprechende, vorzugsweise digital ausgelegten Belichtungsanordnung 6, beispielsweise durch einen gesteuerten Laserstrahl, oder einfacher durch einen LED-Schreibkopf mit einer Auflƶsung von beispielsweise 400 dpi bei einer Schreibbreite von 36" entsprechend dem aufzubringenden Dekor bzw. der Beschriftung, belichtet wird. Es entsteht dadurch in bekannter Weise ein "latentes" elektrostatisches Ladungsbild. The electrophotographic system 4a contains a as a central component Image drum 5, an OPC photoconductor drum with a photoconductive Layer is provided, which has a corresponding, preferably digital designed exposure arrangement 6, for example by a controlled Laser beam, or more simply through an LED write head with a resolution of 400 dpi for example with a writing width of 36 "corresponding to the applied decor or the label is exposed. It arises thereby a "latent" electrostatic charge image in a known manner.

Das elektrophotographische System 4a enthƤlt weiterhin eine Entwicklereinheit 8a mit einem vorzugsweise keramischen, insbesondere 2-Komponenten-Tonersystem, wie es beispielsweise aus der zitierten DE 44 13 168 C2 bekannt geworden ist, mittels der das auf der Bildtrommel 5 befindliche latente elektrostatische Ladungsbild zu einem sichtbaren Tonerbild entwickelt wird. Auch andere geeignete spezielle Toner/Pigmente kƶnnen Anwendung finden. Diese Entwicklereinheit 8a enthƤlt, wie bei dem elektrophotographischen Verfahren Ć¼blich, einen VorratsbehƤlter 8 fĆ¼r den Toner in Verbindung mit den Ć¼blichen Mitteln zum Aufbringen des Toners auf die Bildtrommel 5. Ferner weist das elektrophotographische System 4a eine Ć¼bliche Reinigungsund Lƶscheinheit 8b auf, um den nicht Ć¼bertragenen Toner von der Bildtrommel 5 zu entfernen.The electrophotographic system 4a further contains a developer unit 8a with a preferably ceramic, in particular 2-component, toner system, as known for example from the cited DE 44 13 168 C2 has become, by means of which the latent located on the image drum 5 electrostatic charge image is developed into a visible toner image. Other suitable special toners / pigments can also be used. This developer unit 8a contains, as in the electrophotographic Common method, a storage container 8 for the toner in connection with the usual means for applying the toner to the image drum 5. Furthermore, the electrophotographic system 4a has a conventional cleaning and Erase unit 8b to remove the untransferred toner from the Remove drum 5.

Das auf der Bildtrommel 5 entsprechend dem aufzubringenden Bild entstandene Tonerbild wird anschlieƟend mittels des Transfersystems 4 auf das Erzeugnis 2 Ć¼bertragen. Dieses Transfersystem 4 weist drei Hauptkomponenten auf, die Ɯbertragungswalze 7, mehrere Koronen 9,10, mittels derer durch Anlegen einer Spannung ein elektrostatisches Feld zwecks Ɯbertragen des Tonerbildes erzeugbar ist, und letztlich eine Gegenwalze 11.The resulting on the image drum 5 according to the image to be applied The toner image is then transferred onto the product 2 by means of the transfer system 4 transfer. This transfer system 4 has three main components that Transfer roller 7, several corons 9, 10, by means of which they are applied an electrostatic field to transmit the toner image can be generated, and ultimately a counter roller 11.

FĆ¼r die Ausbildung der Ɯbertragungswalze 7 haben sich zwei alternative Aufbauarten als vorteilhaft ergeben.There are two alternatives for the formation of the transfer roller 7 Types of construction revealed as advantageous.

Bei der ersten Aufbauart ist ein Kern 7a aus elektrisch isolierendem glasfaseroder kohlefaserverstƤrktem Kunststoff (GFK/CFK) vorgesehen. Auf diesem Kern 7a ist eine relativ weiche, ca. 5 mm starke Schicht 7b aus elektrisch leitfƤhigem Silicon, EPDM oder anderen geeigneten Kunststoffen bzw. Gummimischungen aufgebracht, mit einer HƤrte von ca. 50 Shore A und einem Widerstand von ca. 10 kOhm/cm. Diese Werte sind beispielhaft, ohne daƟ die Erfindung darauf beschrƤnkt wƤre. In the first type of construction, a core 7a is made of electrically insulating glass fiber or carbon fiber reinforced plastic (GFK / CFK) provided. A relatively soft, about 5 mm thick layer 7b is made of this core 7a electrically conductive silicone, EPDM or other suitable plastics or rubber compounds applied, with a hardness of approx. 50 Shore A and a resistance of approx. 10 kOhm / cm. These values are exemplary without that the invention would be limited to this.

Die OberflƤche ist mit einer sehr dĆ¼nnen und leitfƤhigen Schicht teflonisiert, oder mit einer anderen geeigneten Beschichtung versehen.The surface is teflonized with a very thin and conductive layer, or provided with another suitable coating.

Innerhalb der Ɯbertragungswalze 7 ist gegenĆ¼ber der Kontaktlinie mit der Bildtrommel 5 eine positive Transferkorona 9 a1, gegenĆ¼ber der Kontaktlinie mit der Gegenwalze 11 eine negative Transferkorona 9 b1 angeordnet.Within the transfer roller 7 is opposite the contact line with the Image drum 5 a positive transfer corona 9 a1, opposite the contact line with the counter roller 11 a negative transfer corona 9 b1 arranged.

Die auf den Kern aufgebrachte Beschichtung trƤgt auf der einen Seite den Toner, lƤƟt aber auf der anderen Seite bei der Koronenentladung eine rĆ¼ckstandslose Ɯbertragung des Toners zu. Hier hat sich vorteilhaft die bereits erwƤhnte Verwendung eines leitfƤhigen Silikongummis als Beschichtungsmaterial erwiesen.The coating applied to the core carries the toner on one side, but on the other hand, leaves a residue-free corona discharge Transfer the toner too. The one already mentioned has been advantageous here Proven use of a conductive silicone rubber as a coating material.

Bei der zweiten AusfĆ¼hrungsart besteht der Kern 7 a aus einem metallischen Werkstoff, vorzugsweise aus Aluminium.
Auf dem Kern ist eine ca. 2 mm starke Schicht 7 c aus isolierendem Silicon oder gleichartigen Materialien aufgebracht. Auf diesem Grundaufbau ist eine relativ weiche, ca. 5 mm starke Schicht 7 b aus elektrisch leitfƤhigem Silicon oder gleichartigen Materialien, wie bei der ersten AusfĆ¼hrungsart, aufgebracht, mit einer HƤrte von ca. 50Ā° Shore und einem Widerstand von ca. 10 kOHM/cm. Auch diese Zahlenwerte sind nur beispielhaft ohne einschrƤnkenden Charakter.In the second embodiment, the core 7 a consists of a metallic material, preferably aluminum.
An approximately 2 mm thick layer 7 c of insulating silicone or similar materials is applied to the core. A relatively soft, approx. 5 mm thick layer 7 b of electrically conductive silicone or similar materials, as in the first embodiment, is applied to this basic structure, with a hardness of approx. 50 Ā° shore and a resistance of approx. 10 kOHM / cm. These numerical values are also only examples and are not restrictive in nature.

Die OberflƤche ist ebenfalls mit einer sehr dĆ¼nnen und leitfƤhigen Schicht teflonisiert oder mit einer anderen Beschichtung versehen. Jeweils auƟerhalb der Ɯbertragungswalze 7 ist nahe der Kontaktlinie mit der Bildtrommel 5 eine positive Transferkorona 9 a2 und nahe der Kontaktlinie mit der Gegenwalze eine negative Transferkorona 10 b angeordnet.The surface is also covered with a very thin and conductive layer teflon-coated or provided with another coating. Always outside the Transfer roller 7 is near the line of contact with image drum 5 positive transfer corona 9 a2 and near the contact line with the counter roller one negative transfer corona 10 b arranged.

Die Gegenwalze 11 besitzt einen Kern 11 a aus einem metallischen Werkstoff, vorzugsweise aus Aluminium. Auf diesem Kern ist eine ca. 5 mm starke Schicht 11 b aus isolierendem Silicon oder einem gleichartigen Material aufgebracht, mit einer HƤrte von ca. 60 Shore A. Auch diese Werte sind nur beispielhaft. Innerhalb der Gegenwalze 11 ist gegenĆ¼ber der Kontaktlinie mit der Ɯbertragungswalze 7 eine positive Transferkorona 10 a angeordnet.The counter roll 11 has a core 11 a made of a metallic material, preferably made of aluminum. There is an approx. 5 mm thick on this core Layer 11 b of insulating silicone or a similar material applied, with a hardness of approx. 60 Shore A. These values are also only exemplary. Within the counter roller 11 is opposite to the contact line the transfer roller 7 arranged a positive transfer corona 10 a.

Das Ɯbertragen des Tonerbildes von der Bildtrommel 5 auf das glasige Erzeugnis 2 mittels des durch die Koronen 9,10 erzeugten elektrostatischen Feldes geschieht wie folgt:The transfer of the toner image from the image drum 5 onto the glassy one Product 2 by means of the electrostatic generated by the corons 9,10 Field happens as follows:

Das auf der Bildtrommel 5 befindliche Tonerbild, bestehend aus negativ geladenen Tonerteilchen, wird in der Kontaktzone von der an dieser Stelle mittels der Transferkorona 9 a1 positiv aufgeladenen Ɯbertragungswalze 7 Ć¼bernommen.The toner image on the image drum 5, consisting of negative charged toner particles, is in the contact zone from that at this point by means of the transfer corona 9 a1 positively charged transfer roller 7 accepted.

Innerhalb einer halben Ɯbertragungswalzendrehung verƤndert sich die positive OberflƤchenladung durch den EinfluƟ der negativen Transferkorona 9 b1 in eine negative OberflƤchenladung.The positive changes within half a transfer roller rotation Surface charge due to the influence of the negative transfer corona 9 b1 in a negative surface charge.

Da die Ɯbertragungswalze 7 mit einem elektrisch leitenden Material beschichtet ist, kƶnnen an unterschiedlichen Stellen der OberflƤche auch unterschiedliche Spannungspotentiale erreicht werden.
Der Widerstandswert zwischen den beiden Transferbereichen liegt bei einem typischen Durchmesser der Ɯbertragungswalze 7 beispielsweise im Bereich von ca. 150 kOhm.Since the transfer roller 7 is coated with an electrically conductive material, different voltage potentials can also be achieved at different points on the surface.
With a typical diameter of the transfer roller 7, the resistance value between the two transfer areas is, for example, in the range of approximately 150 kOhm.

Die Tonerteilchen werden beim Kontakt zwischen der Ɯbertragungswalze 7 mit dem durchlaufenden Glas- oder Keramikkƶrper 2 auf diesen Ć¼bertragen, da dessen OberflƤche Ć¼ber die in der Gegenwalze 11 befindliche negative Transferkorona 10 a positiv aufgeladen ist. The toner particles are in contact with the transfer roller 7 the continuous glass or ceramic body 2 transferred to this, because whose surface over the negative located in the counter roll 11 Transfer corona 10 a is positively charged.

Die Aufbauart der Ɯbertragungswalze 7 lƤƟt die Einstellung der notwendigen und unterschiedlichen Spannungspotentiale an den beiden Transferbereichen zu.The type of construction of the transfer roller 7 allows the setting of the necessary and different voltage potentials at the two transfer areas.

Bedingt durch die relativ weichen Beschichtungen beider WƤlzen 7 und 11 ist der Kontakt auch bei leichten Unebenheiten der zu bedruckenden Materialien 2 noch vorhanden.Due to the relatively soft coatings of both rollers 7 and 11 contact even with slight unevenness in the materials to be printed 2 still there.

Dies fĆ¼hrt zu einem gleichmƤƟigen und optimalen Transfer des Tonerbildes auf die Glas- oder Keramikkƶrper 2.This leads to an even and optimal transfer of the toner image the glass or ceramic body 2.

Die OberflƤche der Ɯbertragungswalze 7 ist zur Reinigung von restlichen Tonerpartikeln mittels einer entsprechenden Einrichtung 12 sehr glatt ausgestaltet. Dadurch ist die Aufbereitung der Ɯbertragungswalze 7 fĆ¼r das Ɯbertragen des nƤchsten Ladungsbildes von der Bildtrommel 5 vereinfacht und es ist keine Gefahr fĆ¼r das Entstehen von Restbildem, die in die folgende Abbildung verschleppt wĆ¼rden, gegeben.The surface of the transfer roller 7 is for cleaning the rest Toner particles very smooth by means of a corresponding device 12 designed. This is the preparation of the transfer roller 7 for the Transfer of the next charge image from the image drum 5 simplified and there is no risk of residual images arising in the following Figure would be dragged.

Im letzten Schritt wird das elektrostatisch Ć¼bertragene Tonerbild mit Ć¼blichen Methoden auf dem Erzeugnis 2 eingebrannt.In the last step, the electrostatically transferred toner image is processed using conventional Methods baked on the product 2.

Die mit der erfindungsgemƤƟen Vorrichtung dekorierten Keramikerzeugnisse betreffen, wie bereits auch im Hauptpatent erwƤhnt, insbesondere die aus Ton oder tonmineralhaltigen Mischungen geformte und gebrannte Erzeugnisse. Weitere bevorzugte Keramikerzeugnisse beinhalten auch Produkte aus sonderkeramischen Werkstoffen, wie z. B. verschiedenste pulverfƶrmige Materialien (z.B. Metalloxide), die auch silikatischer Natur sind. Beispielhaft kƶnnen die Keramikerzeugnisse Waren aus Porzellan, Steingut, aber auch aus sonderkeramischen Stoffen, wie Stearin, Rutil, Cordierit und Cermets darstellen. Das Keramikerzeugnis kann weiterhin vor dem Dekorieren mit einer Glasur versehen werden, oder die Glasur kann nach dem Dekorieren aufgebracht werden. The ceramic products decorated with the device according to the invention concern, as already mentioned in the main patent, especially those made of clay or mixtures of clay-shaped and fired products. Other preferred ceramic products also include products from special ceramic materials such. B. various powdery Materials (e.g. metal oxides) that are also silicate in nature. exemplary The ceramic products can be made from porcelain, earthenware, but also from special ceramic materials such as stearin, rutile, cordierite and cermets represent. The ceramic product can still be used before decorating a glaze, or the glaze can be after decorating be applied.

Glas-/Glaskeramikerzeugnisse umfassen im Rahmen der Erfindung alle aus einer Glasmasse hergestellten Erzeugnisse oder Erzeugnisse mit einer GlasoberflƤche. Insbesondere sollen hierbei
Glas-/Glaskeramikerzeugnisse erwƤhnt werden, die aus einfachen und zusammengesetzten Silikaten von Natrium, Kalium, Calcium, Magnesium, Aluminium, Barium, Zink und Blei bestehen. Diese GlƤser sind auf feurigflammenden Wege entstanden, und die abgekĆ¼hlten Schmelzen bestehen im wesentlichen aus Siliciumdioxid. Calciumoxid und Natriumoxid, wobei SpezialglƤser daneben auch grĆ¶ĆŸere Mengen von Bortrioxid, Phosphorpentoxid, Bariumoxid, Kaliumoxid, Lithiumoxid, Zirconoxid oder Bleioxid enthalten kƶnnen. Siliciumdioxid, Boroxid und Phosphorpentoxid sind die eigentlichen Glasbildner, die auch die Grundlage des Emailles bilden. Dementsprechend sollen unter dem Begriff "Glaserzeugnis" auch Emailleerzeugnisse verstanden werden.Within the scope of the invention, glass / glass ceramic products include all products made from a glass mass or products with a glass surface. In particular, here
Glass / glass ceramic products are mentioned, which consist of simple and composite silicates of sodium, potassium, calcium, magnesium, aluminum, barium, zinc and lead. These glasses were created by fiery flames, and the cooled melts consist essentially of silicon dioxide. Calcium oxide and sodium oxide, whereby special glasses can also contain larger amounts of boron trioxide, phosphorus pentoxide, barium oxide, potassium oxide, lithium oxide, zirconium oxide or lead oxide. Silicon dioxide, boron oxide and phosphorus pentoxide are the actual glass formers, which also form the basis of the enamel. Accordingly, the term "glass product" should also be understood to mean enamel products.

Generell kƶnnen mit entsprechenden Spezialtonern diese auf ebene, flƤchige Substrate aus beliebigen Materialien, wie Kunststoff, Gummi etc. Ć¼bertragen werden.In general, with appropriate special toners, these can be on flat, flat surfaces Transfer substrates from any materials, such as plastic, rubber, etc. become.

Claims (10)

  1. Device for applying decors and/or characters to glass, glass-ceramic and ceramic products (2) using electrophotography having:
    an imaging roller (5), which has an electrostatically chargeable photoconductive layer,
    an exposure arrangement (6) for generating an electrostatic charge image which corresponds to the decors and/or characters which are to be applied,
    a reservoir (8) for preferably a ceramic toner and devices (8a) for developing the electrostatic charge image using this toner,
    an intermediate carrier which on one side is in direct contact with the imaging roller and is designed in such a way that it picks up the toner image, and on the other side is in direct contact with the glass, glass-ceramic or ceramic product,
    at least two coronas (9, 10), the first (9) of which is arranged on the intermediate carrier and the second (10) of which is arranged in the region of the zone of contact between the product (2) and the intermediate carrier, and having
    heating means for burning in the toner image on the product, which has been electrostatically transferred by means of the coronas,
    characterized in that, the intermediate carrier is formed by a dimensionally stable transfer roller (7), and in that the second corona (10) is arranged beneath the product (2), directly in the zone of contact.
  2. Device according to Claim 1, characterized in that a counter-roller (11), which is designed as a hollow roller and in the interior of which or at the surface of which the second corona (10a) is arranged in the region of the contact zone, is arranged beneath the product (2), in direct contact with the latter, in the zone of contact with the transfer roller (7) and in that the first corona (9a1, 9a2) is arranged at the transfer roller (7) in the zone of contact with the imaging roller (5) and has a potential which is opposite to the charge of the toner image on the imaging roller (5), and in that a further, third corona (9b1, 10b), which has an opposite potential to the first corona (9a1, 9a2) and the second corona (10a) in the counter-roller (11), is arranged at the transfer roller (7) in the zone of contact with the product (2).
  3. Device according to Claim 1 or 2, characterized in that the transfer roller (7) is a hollow roller, in the interior of which at least one corona (9a1, 9b1) is arranged.
  4. Device according to Claim 3, characterized in that the transfer roller (7), which is designed as a hollow roller, has an electrically insulating core made from plastic, preferably a plastic which is reinforced with glass fibres or carbon fibres, and in that a relatively soft layer (7b) of electrically conductive silicone, EPDM or other suitable plastics or rubber mixtures is applied to the core (7a), and in that in the interior of the transfer roller (7) on the one hand the first, upper corona (9a1) is arranged in the zone of contact with the imaging roller (5), and on the other hand the third, lower corona (9b1) with an opposite potential is arranged in the zone of contact with the product (2).
  5. Device according to Claim 3, characterized in that the transfer roller (7), which is designed as a hollow roller, has a core (7a) made from metallic material, preferably aluminium, to which a first layer (7c) of insulating silicone or similar materials has been applied, and in that a relatively soft layer (7b) of electrically conductive silicone or a similar material has been applied to this basic structure, and in that in each case outside the transfer roller (7), the first, upper corona (9a2) is arranged in the zone of contact with the imaging roller (5) and the third, lower corona (10b) with an opposite potential is arranged in the zone of contact with the product (2).
  6. Device according to Claim 4 or 5, characterized in that the layer (7b) of electrically conductive material, preferably silicone, has a hardness in the region of 50 Shore A with an internal resistivity in the region of 10 kOhm/cm and a thickness in the region of 5 mm.
  7. Device according to one of Claims 4 to 6, characterized in that the layer (7b) of electrically conductive material is covered with a very thin, conductive Teflon layer or another suitable conductive sliding coating.
  8. Device according to Claim 5, 6 or 7, characterized in that the first layer (7c) of insulating material, preferably silicone, applied to the metallic core (7a) has a thickness in the region of 2 mm.
  9. Device according to one of Claims 2 to 8, characterized in that the counter-roller (11) has a metallic core (11a), preferably of aluminium, to which a relatively soft layer (11b) of insulating material, preferably silicone, has been applied.
  10. Device according to Claim 9, characterized in that the layer (11b) of insulating material has a hardness in the region of 50 Shore A and a thickness in the region of 5 mm.
EP99971106A 1998-10-27 1999-10-21 Device for applying decors and/or characters on glass, glass ceramics and ceramics products Expired - Lifetime EP1125171B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1998149500 DE19849500C2 (en) 1998-10-27 1998-10-27 Process for applying decorations and / or symbols to glass, glass ceramic and ceramic products
DE19849500 1998-10-27
DE19921321 1999-05-08
DE19921321A DE19921321C1 (en) 1998-10-27 1999-05-08 Device for applying decorations and / or characters to glass, glass ceramic and ceramic products
PCT/EP1999/007989 WO2000025182A1 (en) 1998-10-27 1999-10-21 Device for applying decors and/or characters on glass, glass ceramics and ceramics products

Publications (2)

Publication Number Publication Date
EP1125171A1 EP1125171A1 (en) 2001-08-22
EP1125171B1 true EP1125171B1 (en) 2003-12-03

Family

ID=26049788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99971106A Expired - Lifetime EP1125171B1 (en) 1998-10-27 1999-10-21 Device for applying decors and/or characters on glass, glass ceramics and ceramics products

Country Status (10)

Country Link
US (1) US6487386B1 (en)
EP (1) EP1125171B1 (en)
JP (1) JP3460084B2 (en)
AT (1) ATE255731T1 (en)
BR (1) BR9915097A (en)
CA (1) CA2348592C (en)
DE (2) DE19921321C1 (en)
ES (1) ES2212676T3 (en)
HK (1) HK1042556B (en)
WO (1) WO2000025182A1 (en)

Cited By (1)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006017359B3 (en) * 2006-04-11 2007-12-20 Schott Ag Semiconductor wafers packing method involves producing structured surface charge on surface of auxiliary substrate, where structured exposing and coating compounds are applied on surface of auxiliary substrate

Families Citing this family (22)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052371A1 (en) * 2000-10-20 2002-05-02 Schott Glas Modular electrographic printer has bearer with holding positions in series with standard mechanical interfaces, electrophotographic units with fixing parts matching interfaces
DE10052370C2 (en) * 2000-10-20 2003-06-05 Schott Glas Electrophotographic printing device
DE10142443C1 (en) * 2001-08-31 2003-04-24 Schott Glas Electrophotographic printing device
DE10226561B4 (en) * 2002-06-14 2006-12-28 Schott Ag Glass or glass ceramic article and method of decorating an article of glass or glass ceramic
DE10335920B4 (en) * 2003-08-06 2005-08-18 Schott Ag print Setup
DE10354345A1 (en) * 2003-11-20 2005-07-07 Schott Ag Multicolor printing device
US7504361B2 (en) * 2004-06-03 2009-03-17 Neely Richard A Glass paneling with a sublimated image and process for making the same
DE102004053940B4 (en) * 2004-11-09 2011-03-10 Schott Ag Method for evaluating containers
DE102005010506B4 (en) * 2005-03-08 2012-04-05 Schott Ag Optical element and method for its production
US7622237B2 (en) * 2005-09-29 2009-11-24 Terrie Banhazl System, apparatus, and method for the permanent transfer of images onto glossy surfaces
JP2007212809A (en) * 2006-02-10 2007-08-23 Mitsubishi Heavy Ind Ltd Electrophotographic printer, electrophotographic printing method and method for manufacturing plate glass
JP2007333879A (en) * 2006-06-13 2007-12-27 Mitsubishi Heavy Ind Ltd Developing device for electrophotographic printer, device for removing toner of non-pattern part, electrophotographic printer using them, electrophotographic printing method, and method for manufacturing plate glass or ceramic plate
GB2446386A (en) * 2007-02-06 2008-08-13 Univ Montfort Electrostatic printing method and its use in rapid prototyping
US20080241723A1 (en) 2007-03-26 2008-10-02 Xerox Corporation Emulsion aggregation toner compositions having ceramic pigments
US20070170168A1 (en) * 2007-04-13 2007-07-26 Moschetti Mitchell R Color-coded cooktop and controls
ITMO20080098A1 (en) * 2008-04-03 2009-10-04 System Spa DEVICE FOR THE DECORATION OF CERAMIC PRODUCTS THROUGH INDIRECT PHOTOELECTROGRAPHY AND SYSTEM INCLUDING THE DEVICE.
EP2266925A1 (en) 2009-06-22 2010-12-29 AGC Glass Europe Localised matting of glass
US9217090B2 (en) 2012-02-29 2015-12-22 Wki Holding Company, Inc. Method and system for ink jet printing images to complex contoured surfaces of ceramic and glass items such as dishware
CN103268062B (en) * 2013-05-21 2015-10-28 ē ęµ·å¤©åØé£žé©¬ę‰“å°č€—ęęœ‰é™å…¬åø Handle box and laser planeplate printer
KR20160070126A (en) * 2013-10-14 2016-06-17 ģ½”ė‹ ģøģ½”ķ¬ė ˆģ“ķ‹°ė“œ Method of printing decorations on substrates
US9796191B2 (en) 2015-03-20 2017-10-24 Corning Incorporated Method of inkjet printing decorations on substrates
JP2021039229A (en) * 2019-09-03 2021-03-11 ćƒ’ćƒ„ćƒ¼ćƒ¬ćƒƒćƒˆāˆ’ćƒ‘ćƒƒć‚«ćƒ¼ćƒ‰ ćƒ‡ćƒ™ćƒ­ćƒƒćƒ—ćƒ”ćƒ³ćƒˆ ć‚«ćƒ³ćƒ‘ćƒ‹ćƒ¼ ć‚Ø惫ļ¼Žćƒ”ćƒ¼ļ¼Žļ¼Øļ½…ļ½—ļ½Œļ½…ļ½”ļ½”ā€ļ¼°ļ½ļ½ƒļ½‹ļ½ļ½’ļ½„ ļ¼¤ļ½…ļ½–ļ½…ļ½Œļ½ļ½ļ½ļ½…ļ½Žļ½” ļ¼£ļ½ļ½ļ½ļ½ļ½Žļ½™ļ¼Œ ļ¼¬ļ¼Žļ¼°ļ¼Ž Image formation system having transfer roller

Family Cites Families (14)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6217757A (en) * 1985-07-16 1987-01-26 Ricoh Co Ltd Color electrophotographic method
US4684238A (en) 1986-06-09 1987-08-04 Xerox Corporation Intermediate transfer apparatus
JP2698079B2 (en) * 1987-10-02 1998-01-19 ę±ę“‹č£½ē½ ę Ŗ式会ē¤¾ Multicolor printing method for containers
EP0453762B1 (en) 1990-04-23 1996-09-18 Xerox Corporation Imaging apparatus and process with intermediate transfer element
JP3019517B2 (en) 1991-08-30 2000-03-13 åÆŒå£«ć‚¼ćƒ­ćƒƒć‚Æć‚¹ę Ŗ式会ē¤¾ Multiple transfer device
JP3214037B2 (en) * 1992-02-05 2001-10-02 ć‚½ćƒ‹ćƒ¼ę Ŗ式会ē¤¾ Optical disc label printing equipment
JPH0635238A (en) * 1992-07-22 1994-02-10 Nkk Corp Method and device for producing printing metallic plate
DE4413168C2 (en) * 1993-10-07 1998-01-15 Michael Zimmer Process for producing decorated ceramic and glass products and ceramic color compositions for carrying out the process
JPH08146819A (en) * 1994-11-22 1996-06-07 Konica Corp Image forming method
IL113507A0 (en) 1995-04-26 1995-07-31 Indigo Nv Printing on floor tiles and the like
EP0760495B1 (en) 1995-09-01 2001-11-21 Canon Kabushiki Kaisha Image forming apparatus
US5701567A (en) 1995-10-27 1997-12-23 Eastman Kodak Company Compliant transfer member having multiple parallel electrodes and method of using
JPH09218593A (en) * 1996-02-08 1997-08-19 Fuji Xerox Co Ltd Image forming device
NL1004179C2 (en) * 1996-10-03 1998-04-06 Oce Tech Bv Device for decoding ceramic and glass carriers and toner powder to be used in this device.

Cited By (1)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006017359B3 (en) * 2006-04-11 2007-12-20 Schott Ag Semiconductor wafers packing method involves producing structured surface charge on surface of auxiliary substrate, where structured exposing and coating compounds are applied on surface of auxiliary substrate

Also Published As

Publication number Publication date
EP1125171A1 (en) 2001-08-22
WO2000025182A1 (en) 2000-05-04
US6487386B1 (en) 2002-11-26
DE59907964D1 (en) 2004-01-15
BR9915097A (en) 2001-08-14
HK1042556A1 (en) 2002-08-16
JP2002528769A (en) 2002-09-03
ATE255731T1 (en) 2003-12-15
JP3460084B2 (en) 2003-10-27
CA2348592A1 (en) 2000-05-04
HK1042556B (en) 2004-11-26
DE19921321C1 (en) 2000-11-23
CA2348592C (en) 2004-09-28
ES2212676T3 (en) 2004-07-16

Similar Documents

Publication Publication Date Title
EP1125171B1 (en) Device for applying decors and/or characters on glass, glass ceramics and ceramics products
DE2111561C2 (en) Process for producing an impression and use of a tellurium-containing semiconductor layer for offset printing
DE19718303C1 (en) Multicoloured decoration of glass pane
DE69630339T2 (en) Color image forming method using inorganic toners, inorganic toners for developing latent electrostatic images and image transfer medium bearing a color image
DE813359C (en) Process for the transfer of powder images to other carriers
DE2434130A1 (en) PROCESS FOR MAKING DURABILITY OF A DECORATION MADE FROM COLORS, LETTERING OD. DGL. ON A GLASS ARTICLE
DE2555855A1 (en) ILLUSTRATION PROCEDURE
DE19921923A1 (en) Method and device for applying decorations and / or characters to glass, glass ceramic and ceramic products
DE19849500C2 (en) Process for applying decorations and / or symbols to glass, glass ceramic and ceramic products
DE3924848C1 (en)
DE4041358C2 (en)
DE2856202C2 (en) Electrophotographic flexible metal printing cylinder body
DE1522518A1 (en) Process for the production of master printing plates
DE3942021A1 (en) Pattern transfer - has colours softened by heat to transfer from primary to secondary carrier under heat and pressure
DE4024419A1 (en) Printing support - has first coating of fusible material and second acid- and alkali-resistant plastic coating
AT502658B1 (en) METHOD FOR SIGNATING A CABLE
DE1496169A1 (en) Process for the production of printing plates
DE1279467B (en) Electrophotographic process for producing images and electrophotographic copier
EP1208409A1 (en) Method for applying a coating to a surface of a material
DE2735138A1 (en) Generating raised image for tactile reading - using filler sprinkled onto heat softened toner of printed image
DE1496602C (en) Electrostatic process for producing single or multi-colored patterns, especially on glass objects
WO1991008117A1 (en) Process for applying pictorial designs to the surfaces of articles
EP0683039A1 (en) Method for making multicolour printed films for flexible keyboards
DE3931151A1 (en) Pictoral pattern transfer of photocopy to decorative object
DE10035922A1 (en) Process for printing objects and colored powder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010222

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031203

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031203

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59907964

Country of ref document: DE

Date of ref document: 20040115

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040303

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040303

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2212676

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041021

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041021

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041021

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

26N No opposition filed

Effective date: 20040906

REG Reference to a national code

Ref country code: HK

Ref legal event code: GR

Ref document number: 1042556

Country of ref document: HK

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: M. ZIMMER

Effective date: 20060612

Owner name: SCHOTT AG

Effective date: 20060612

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20061016

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20061030

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20061031

Year of fee payment: 8

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

NLS Nl: assignments of ep-patents

Owner name: ASAHI GLASS COMPANY LTD.

Effective date: 20070515

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

BECA Be: change of holder's address

Owner name: *ASAHI GLASS CO. LTD1-12-1 YURAKUCHO, CHIYODA-KU,

Effective date: 20051219

BECH Be: change of holder

Owner name: *ASAHI GLASS CO. LTD

Effective date: 20051219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040503

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20080501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080501

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20071022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071021

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20101020

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101013

Year of fee payment: 12

Ref country code: BE

Payment date: 20100915

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101020

Year of fee payment: 12

BERE Be: lapsed

Owner name: *ASAHI GLASS CO. LTD

Effective date: 20111031

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111021

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120501

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111031

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59907964

Country of ref document: DE

Effective date: 20120501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111102

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111021