EP0718719B1 - Electrophotographic printing apparatus for metal sheets - Google Patents

Electrophotographic printing apparatus for metal sheets Download PDF

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Publication number
EP0718719B1
EP0718719B1 EP95118275A EP95118275A EP0718719B1 EP 0718719 B1 EP0718719 B1 EP 0718719B1 EP 95118275 A EP95118275 A EP 95118275A EP 95118275 A EP95118275 A EP 95118275A EP 0718719 B1 EP0718719 B1 EP 0718719B1
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EP
European Patent Office
Prior art keywords
toner
image
image carrier
roller
sheet
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Expired - Lifetime
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EP95118275A
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German (de)
French (fr)
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EP0718719A1 (en
Inventor
Hans Mathea
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Markem Imaje CSAT GmbH
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CSAT Gesellschaft fuer Computer Systeme and Automalions Technik mbH
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Publication of EP0718719A1 publication Critical patent/EP0718719A1/en
Application granted granted Critical
Publication of EP0718719B1 publication Critical patent/EP0718719B1/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/14Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16Apparatus 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
    • G03G15/1625Apparatus 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

  • the invention relates to an electrophotographic Printers, especially a laser or LED printer, for Metal foils, in particular aluminum foils for blister packs, with an image carrier for transferring toner from a toner container on the metal foil, and one first loading unit, which in the area of the image carrier facing Side of the metal foil is arranged.
  • a laser beam is used accordingly guided the print image over a so-called image roller, which are electrostatic at the relevant points changed.
  • the surface of the image roller is after the Labeling by the laser beam on a toner unit passed, causing the electrostatically changed Cover areas of the image roller with toner.
  • the one on the image roller adhering toner is subsequently attached to the one to be printed Medium released. This happens in such a way that printing medium also electrostatically is charged, causing the toner adhering to the image roller is transferred to the medium to be printed.
  • the toner becomes either complete or only partial released by the image roller.
  • the one remaining on the image roller Toner is removed by a cleaning unit from the image roller removed and in a container for used Toner collected.
  • the electrostatic charging of the medium to be printed happens regularly through a loading unit, a so-called Corona, which on the side facing away from the image roller of the medium to be printed is arranged.
  • a printer system is known from EP-A-0 309 588, transferring the toner from an image roller to a film becomes.
  • a loading unit arranged by means of which the surface of the Image roller is charged so that it is suitable for the absorption of toner is.
  • a transfer unit is arranged on the side of the film.
  • the loading unit is on that of the image roller facing side of the metal foil arranged. It has it has been shown that such a loading unit arranged Metal foils without applying a large amount of toner the image carrier can be printed with very good results. This corresponds to the arrangement according to the invention printed image applied to a metal foil, for example that of Feeding an equal amount of toner onto the image carrier on a paper web with a conventional arrangement of Load unit applied print image.
  • a further loading unit can be provided, which is based on conventional Way on the side facing away from the image carrier Foil is arranged.
  • a controller can advantageously be provided for the printer be, by means of which the first and the second loading unit can be activated. If necessary, either first, second or both loading units are activated.
  • the control can also be designed that the level of the voltages applied to the loading units is adjustable. This creates a large area within which a medium to be printed is static can be charged.
  • films of different thicknesses can be printed or foils made of a material which is difficult to charge statically from below.
  • non-metallic foils can be printed.
  • the invention Arrangement allows printing of very thick or difficult to recharge materials.
  • the loading units can advantageously face each other be arranged. You could then as a unit be trained. This has a beneficial effect on the Design and manufacturing costs.
  • the ionizing units can also offset in the transport direction of the metal foil his.
  • the first loading unit in the area in Transport direction of the film seen in front of the image carrier be and the second loading unit below the image carrier.
  • the present invention is also based on a Laser printer has been described, so it can be taken for granted can also be applied to a printer at which the image carrier is described in another way, and the blackening agents such as toner, color, etc. by means of Transfer loading units to the medium to be printed like an electromagnetic one Printer based on a magnetic principle or at a Ion printer based on an ion transfer principle.
  • the only figure shows a schematic representation of the most essential parts of a laser printer according to the invention.
  • a metal foil 1 is so passed an image roller 2 that the surface of the Image roller 2 with the surface of the metal foil 1 in contact is coming.
  • the film 1 can also be used in a small amount Distance past the roller surface.
  • the Surface of the image roller 2 is designed so that it is electrostatically chargeable.
  • a laser beam 7 becomes corresponding the original image over the surface of the image drum 2 performed that the surface of the imaging drum 2 electrostatically changed according to the picture template.
  • the toner container 3 contains a transfer roller 3b, by means of which toner from the container 3 onto the image roller 2 is transmitted. In the places where the surface the image roller 2 electrostatically according to the Original is changed, toner remains on the image roller 2 be liable. By rotating in the direction of arrow 8 the toner adhering to the image roller 2 becomes the surface the metal foil 1 transported.
  • a first loading unit 4 is in the transport direction of the metal foil 1 seen in the area in front of the image roller 2 arranged.
  • the metal foil 1 electrostatically charged.
  • the toner not removed from the image roller 2 is by means of a stripper 9 in the further course of the rotary movement the image roller 2 removed from the surface of the image roller 2.
  • the toner thus removed is collected in a container 10.
  • a further loading unit 5 is provided, which on the surface of the metal foil facing away from the image roller 2 1 is arranged.
  • the further loading unit 5 is located in the area below the image roller 2.
  • a controller 6 is provided for activation of the two loading units 4, 5 or for control the level of the voltages applied to the loading units 4, 5 .
  • the loading units 4, 5 can be controlled manually.
  • the control can also depend on the thickness or of the material of the metal foil 1. To do this would have to Appropriate sensor can be provided, which the required Outputs parameters to the controller 6.

Description

Die Erfindung betrifft einen elektrophotographischen Drucker, insbesondere einen Laser- oder LED-Drucker, für Metallfolien, insbesondere Aluminiumfolien für Blisterverpackungen, mit einem Bildträger zum Übertragen von Toner aus einem Tonerbehälter auf die Metallfolie, und einer ersten Ladeeinheit, welche im Bereich der dem Bildträger zugewandten Seite der Metallfolie angeordnet ist.The invention relates to an electrophotographic Printers, especially a laser or LED printer, for Metal foils, in particular aluminum foils for blister packs, with an image carrier for transferring toner from a toner container on the metal foil, and one first loading unit, which in the area of the image carrier facing Side of the metal foil is arranged.

Bei heute bekannten Laser-Druckern wird ein Laserstrahl entsprechend dem Druckbild über eine sogenannte Bildwalze geführt, welche sich an den betreffenden Stellen elektrostatisch verändert. Die Oberfläche der Bildwalze wird nach der Beschriftung durch den Laserstrahl an einer Toner-Einheit vorbeigeführt, wodurch sich die elektrostatisch veränderten Bereiche der Bildwalze mit Toner bedecken. Der an der Bildwalze haftende Toner wird nachfolgend an das zu bedruckende Medium abgegeben. Dies geschieht in der Weise, daß das zu bedruckende Medium ebenfalls entsprechend elektrostatisch aufgeladen ist, wodurch der an der Bildwalze haftende Toner auf das zu bedruckende Medium übertragen wird. Je nach Größe der elektrostatischen Aufladung des zu bedruckenden Mediums wird der Toner entweder vollständig oder nur teilweise von der Bildwalze abgegeben. Der an der Bildwalze verbleibende Toner wird mittels einer Reinigungseinheit von der Bildwalze entfernt und in einem Behälter für verbrauchten Toner gesammelt.In today's known laser printers, a laser beam is used accordingly guided the print image over a so-called image roller, which are electrostatic at the relevant points changed. The surface of the image roller is after the Labeling by the laser beam on a toner unit passed, causing the electrostatically changed Cover areas of the image roller with toner. The one on the image roller adhering toner is subsequently attached to the one to be printed Medium released. This happens in such a way that printing medium also electrostatically is charged, causing the toner adhering to the image roller is transferred to the medium to be printed. Depending on Size of the electrostatic charge to be printed Medium, the toner becomes either complete or only partial released by the image roller. The one remaining on the image roller Toner is removed by a cleaning unit from the image roller removed and in a container for used Toner collected.

Die elektrostatische Aufladung des zu bedruckenden Mediums geschieht regelmäßig durch eine Ladeeinheit, einer sogenannten Korona, welche an der der Bildwalze abgewandten Seite des zu bedruckenden Mediums angeordnet ist.The electrostatic charging of the medium to be printed happens regularly through a loading unit, a so-called Corona, which on the side facing away from the image roller of the medium to be printed is arranged.

Daraus ergibt sich der Nachteil, daß beispielsweise dickere Folien nicht so stark aufgeladen werden können, daß sie genügend Toner von der Bildwalze abnehmen können, wodurch das Druckbild zu schwach wird und eine größere Menge Toner auf der Bildwalze verbleibt. Der nicht abgezogene Toner ist verbraucht und muß entsorgt werden. Um das Druckbild stärker zu machen, muß mehr Toner auf die Bildwalze aufgebracht werden. Hierdurch wird zwar das Druckbild etwas stärker, jedoch erhöht sich auch die Menge des verbrauchten Toners. Dies wirkt sich nicht nur nachteilig auf die Kosten aus, sondern belastet darüber hinaus auch noch die Umwelt.This results in the disadvantage that, for example, thicker ones Foils cannot be charged so much that they are sufficient Can remove toner from the image roller, causing the Print image becomes too weak and a large amount of toner appears the image roller remains. The toner that has not been removed is used up and must be disposed of. To make the printed image stronger to make more toner must be applied to the image roller. This will make the printed image a little stronger, however the amount of toner consumed also increases. Not only does this have a negative impact on costs, but also pollutes the environment.

Der vorher beschriebene Nachteil tritt nicht nur bei dicken Folien, sondern auch besonders stark bei Metallfolien auf. Metallfolien können mit bisher bekannten elektrophotographischen Druckern nicht oder nur unzureichend bedruckt werden. Aus der US-A-5,172,174 ist ein Druckersystem bekannt, bei welcher Toner von einer Bildwalze auf eine Folie übertragen wird. Zur Übertragung des Toners auf die Folie ist eine erste Ladeeinheit vorgesehen, welche der Bildwalze gegenübersteht und an der Stelle angeordnet ist, an der die Bildwalze mit der Folie in Berührung kommt. Des weiteren ist im Bereich der dem Bildträger zugewandten Seite der Folie eine zweite Ladeeinheit angeordnet, mittels der die dem Bildträger zugewandte Seite der Folie so aufgeladen wird, daß eine Übertragung von Toner vom Bildträger auf die Folie verhindert wird.The previously described disadvantage does not only occur with thick ones Foils, but also particularly strongly with metal foils. Metal foils can be made using previously known electrophotographic Printers are not or only insufficiently printed. From US-A-5,172,174 a printer system is known in which Toner is transferred from an image roller to a film. A first loading unit is used to transfer the toner to the film provided which faces the image roller and on is located at the point where the image roller with the film comes into contact. Furthermore, in the field of Image carrier facing side of the film a second loading unit arranged by means of which the side of the image carrier facing the Foil is charged so that a transfer of toner from the Image carrier on the slide is prevented.

Des weiteren ist aus der EP-A-0 309 588 ein Druckersystem bekannt, bei dem Toner von einer Bildwalze auf eine Folie übertragen wird. Im der Folie abgewandten Bereich der Bildwalze ist eine Ladeeinheit angeordnet, mittels der die Oberfläche der Bildwalze aufgeladen wird, damit sie zur Aufnahme von Toner geeignet ist. Ebenfalls an der Stelle, an der die Bildwalze mit der Folie in Berührung kommt, ist an der der Bildwalze abgewandten Seite der Folie eine Transfereinheit angeordnet. Furthermore, a printer system is known from EP-A-0 309 588, transferring the toner from an image roller to a film becomes. In the area of the image roller facing away from the film a loading unit arranged by means of which the surface of the Image roller is charged so that it is suitable for the absorption of toner is. Also at the point where the image roller with the film comes into contact is on the side facing away from the image roller A transfer unit is arranged on the side of the film.

Es ist daher Aufgabe der Erfindung, einen eingangs genannten elektrophotographischen Drucker derart auszubilden, daß er zum Bedrucken von Metallfolien bei möglichst geringem Tonerverbrauch geeignet ist.It is therefore an object of the invention, one mentioned at the outset to train electrophotographic printers in such a way that he for printing metal foils with as little as possible Toner consumption is suitable.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.The solution to this problem results from the features of characterizing part of claim 1. Advantageous further developments the invention result from the dependent claims.

Gemäß der Erfindung ist die Ladeeinheit an der der Bildwalze zugewandten Seite der Metallfolie angeordnet. Es hat sich gezeigt, daß durch eine derart angeordnete Ladeeinheit Metallfolien ohne eine größere Aufbringung von Toner auf den Bildträger mit sehr gutem Ergebnis bedruckt werden können. Durch die erfindungsgemäße Anordnung entspricht das auf eine Metallfolie aufgebrachte Druckbild etwa dem bei Zuführung einer gleichen Tonermenge auf den Bildträger dem auf eine Papierbahn mit einer herkömmlichen Anordnung der Ladeeinheit aufgebrachten Druckbild.According to the invention, the loading unit is on that of the image roller facing side of the metal foil arranged. It has it has been shown that such a loading unit arranged Metal foils without applying a large amount of toner the image carrier can be printed with very good results. This corresponds to the arrangement according to the invention printed image applied to a metal foil, for example that of Feeding an equal amount of toner onto the image carrier on a paper web with a conventional arrangement of Load unit applied print image.

Zum Bedrucken von stärkeren Folien kann im Drucker jedoch eine weitere Ladeeinheit vorgesehen sein, welche auf herkömmliche Weise an der dem Bildträger abgewandten Seite der Folie angeordnet ist. Bei einem derart ausgebildeten Drucker kann in vorteilhafter Weise eine Steuerung vorgesehen sein, mittels der die erste und die zweite Ladeeinheit aktiviert werden können. Bei Bedarf kann somit entweder die erste, die zweite oder beide Ladeeinheiten aktiviert werden. Die Steuerung kann jedoch auch so ausgebildet sein, daß die Höhe der an den Ladeeinheiten anliegenden Spannungen einstellbar ist. Hierdurch ergibt sich ein großer Bereich, innerhalb dessen ein zu bedruckendes Medium statisch aufgeladen werden kann. However, you can use the printer to print thicker films a further loading unit can be provided, which is based on conventional Way on the side facing away from the image carrier Foil is arranged. With such a trained A controller can advantageously be provided for the printer be, by means of which the first and the second loading unit can be activated. If necessary, either first, second or both loading units are activated. However, the control can also be designed that the level of the voltages applied to the loading units is adjustable. This creates a large area within which a medium to be printed is static can be charged.

Es können beispielsweise unterschiedlich dicke Folien bedruckt werden oder auch Folien aus einem Material, welches sich von unten schlecht statisch aufladen läßt. Selbstverständlich können mit einem erfindungsgemäßen Drucker auch nichtmetallische Folien bedruckt werden. Die erfindungsgemäße Anordnung erlaubt das Bedrucken von sehr dicken oder schwer aufladbaren Materialien.For example, films of different thicknesses can be printed or foils made of a material which is difficult to charge statically from below. Of course can also with a printer according to the invention non-metallic foils can be printed. The invention Arrangement allows printing of very thick or difficult to recharge materials.

Die Ladeeinheiten können in vorteilhafter Weise sich gegenüberstehend angeordnet sein. Sie könnten dann als eine Einheit ausgebildet sein. Dies wirkt sich vorteilhaft auf die Bauform und die Herstellungskosten aus.The loading units can advantageously face each other be arranged. You could then as a unit be trained. This has a beneficial effect on the Design and manufacturing costs.

Wenn es jedoch erforderlich ist, können die Ionisiereinheiten auch in Transportrichtung der Metallfolie versetzt angeordnet sein. So kann die erste Ladeeinheit im Bereich in Transportrichtung der Folie gesehen vor dem Bildträger angeordnet sein und die zweite Ladeeinheit unterhalb des Bildträgers.However, if necessary, the ionizing units can also offset in the transport direction of the metal foil his. The first loading unit in the area in Transport direction of the film seen in front of the image carrier be and the second loading unit below the image carrier.

Da durch die erfindungsgemäße Ausgestaltung eines elektrophotographischen Druckers Metallfolien ohne eine erhöhte Aufbringung von Toner auf den Bildträger bedruckt werden können, ergibt sich eine erhebliche Kostensenkung beim Drucken. Darüber hinaus fällt bedeutend weniger Toner-Abfall an, wodurch die Umwelt entlastet wird.Since the inventive design of an electrophotographic Printer's metal foils without an elevated Application of toner to be printed on the image carrier can result in a significant cost reduction in To press. In addition, there is significantly less waste of toner which relieves the burden on the environment.

Wenngleich die vorliegende Erfindung auch anhand eines Laser-Druckers beschrieben wurde, so kann sie selbstverständlich auch bei einem Drucker angewendet werden, bei welchem der Bildträger in anderer Weise beschrieben wird, und die Schwärzungsmittel wie Toner, Farbe usw. mittels Ladeeinheiten auf das zu bedruckende Medium übertragen werden, wie beispielsweise bei einem elektromagnetischen Drucker nach einem magnetischen Prinzip oder bei einem Ionen-Drucker nach einem Ionentransfer-Prinzip. Although the present invention is also based on a Laser printer has been described, so it can be taken for granted can also be applied to a printer at which the image carrier is described in another way, and the blackening agents such as toner, color, etc. by means of Transfer loading units to the medium to be printed like an electromagnetic one Printer based on a magnetic principle or at a Ion printer based on an ion transfer principle.

Weitere Einzelheiten, Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines besonderen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.Further details, features and advantages of the present Invention result from the following description a particular embodiment with reference on the drawing.

Es zeigt die einzige Figur eine schematische Darstellung der wesentlichsten Teile eines erfindungsgemäßen Laser-Druckers.The only figure shows a schematic representation of the most essential parts of a laser printer according to the invention.

Wie der Fig. zu entnehmen ist, wird eine Metallfolie 1 so an einer Bildwalze 2 vorbeigeführt, daß die Oberfläche der Bildwalze 2 mit der Oberfläche der Metallfolie 1 in Berührung kommt. Die Folie 1 kann jedoch auch in einem geringen Abstand an der Walzenoberfläche vorbeigeführt werden. Die Oberfläche der Bildwalze 2 ist so ausgestaltet, daß sie elektrostatisch aufladbar ist. Ein Laserstrahl 7 wird entsprechend der Bildvorlage so über die Oberfläche der Bildtrommel 2 geführt, daß sich die Oberfläche der Bildtrommel 2 entsprechend der Bildvorlage elektrostatisch verändert.As can be seen from the figure, a metal foil 1 is so passed an image roller 2 that the surface of the Image roller 2 with the surface of the metal foil 1 in contact is coming. However, the film 1 can also be used in a small amount Distance past the roller surface. The Surface of the image roller 2 is designed so that it is electrostatically chargeable. A laser beam 7 becomes corresponding the original image over the surface of the image drum 2 performed that the surface of the imaging drum 2 electrostatically changed according to the picture template.

Nachdem die Oberfläche der Bildtrommel 2 elektrostatisch aufgeladen ist, wird sie an einem Tonerbehälter 3 vorbeigeführt. Der Tonerbehälter 3 enthält eine Übertragungswalze 3b, mittels welcher Toner aus dem Behälter 3 auf die Bildwalze 2 übertragen wird. An den Stellen, an der die Oberfläche der Bildwalze 2 elektrostatisch entsprechend der Bildvorlage verändert ist, bleibt Toner an der Bildwalze 2 haften. Durch die Drehbewegung in Richtung des Pfeils 8 wird der an der Bildwalze 2 haftende Toner zur Oberfläche der Metallfolie 1 transportiert.After the surface of the image drum 2 electrostatically is charged, it is guided past a toner container 3. The toner container 3 contains a transfer roller 3b, by means of which toner from the container 3 onto the image roller 2 is transmitted. In the places where the surface the image roller 2 electrostatically according to the Original is changed, toner remains on the image roller 2 be liable. By rotating in the direction of arrow 8 the toner adhering to the image roller 2 becomes the surface the metal foil 1 transported.

Eine erste Ladeeinheit 4 ist in Transportrichtung der Metallfolie 1 gesehen im Bereich vor der Bildwalze 2 angeordnet. Hierdurch wird die der Bildwalze 2 zugewandte Seite der Metallfolie 1 elektrostatisch aufgeladen. Durch die elektrostatische Aufladung überträgt sich der an der Bildwalze 2 haftende Toner auf die Oberfläche der Metallfolie 1. Der nicht von der Bildwalze 2 abgenommene Toner wird mittels eines Abstreifers 9 im weiteren Verlauf der Drehbewegung der Bildwalze 2 von der Oberfläche der Bildwalze 2 entfernt. Der so entfernte Toner wird in einem Behälter 10 gesammelt.A first loading unit 4 is in the transport direction of the metal foil 1 seen in the area in front of the image roller 2 arranged. As a result, the side facing the image roller 2 the metal foil 1 electrostatically charged. Through the electrostatic charge is transferred to the image roller 2 adhering toners on the surface of the metal foil 1. The toner not removed from the image roller 2 is by means of a stripper 9 in the further course of the rotary movement the image roller 2 removed from the surface of the image roller 2. The toner thus removed is collected in a container 10.

Zur Vergrößerung der elektrostatischen Aufladung der Metallfolie 1 ist eine weitere Ladeeinheit 5 vorgesehen, welche an der der Bildwalze 2 abgewandten Oberfläche der Metallfolie 1 angeordnet ist. Die weitere Ladeeinheit 5 befindet sich im Bereich unterhalb der Bildwalze 2. Zur Aktivierung der beiden Ladeeinheiten 4, 5 beziehungsweise zur Steuerung der Höhe der an den Ladeeinheiten 4, 5 anliegenden Spannungen ist eine Steuerung 6 vorgesehen. Mittels der Steuerung 6 können die Ladeeinheiten 4, 5 manuell gesteuert werden. Die Steuerung kann aber auch in Abhängigkeit der Dicke oder des Materials der Metallfolie 1 erfolgen. Hierzu müßte ein entsprechender Sensor vorgesehen werden, welcher die benötigten Parameter an die Steuerung 6 abgibt.To increase the electrostatic charge of the metal foil 1, a further loading unit 5 is provided, which on the surface of the metal foil facing away from the image roller 2 1 is arranged. The further loading unit 5 is located in the area below the image roller 2. For activation of the two loading units 4, 5 or for control the level of the voltages applied to the loading units 4, 5 a controller 6 is provided. By means of the control 6, the loading units 4, 5 can be controlled manually. The control can also depend on the thickness or of the material of the metal foil 1. To do this would have to Appropriate sensor can be provided, which the required Outputs parameters to the controller 6.

Claims (5)

  1. An electrophotographic printer, in particular a laser or LED-printer, for sheets (1), in particular aluminium sheets for blister packs. comprising an image carrier (2) for transferring toner from a toner container (3) on to a sheet (1), characterised in that the printer includes a charging unit (4) which is arranged in the region of the side of the sheet, that is towards the image carrier (2), and which is suitable for electrostatically charging the side of the sheet (1), that is towards the image carrier (2), so that the toner clinging to the image carrier (2) is transferred on to the side of the sheet (1), that is towards the image carrier, by said electrostatic charge.
  2. An electrophotographic printer according to claim 1 characterised in that there is a second charging unit (5) which is arranged at the side of the sheet (1), that is remote from the image carrier (2).
  3. An electrophotographic printer according to claim 2 characterised in that there is a control means (6), by means of which the first and the second charging units (4, 5) can be activated.
  4. An electrophotographic printer according to claim 3 characterised in that the level of the voltage applied to the charging units (4, 5) can be set by means of the control means (6).
  5. An electrophotographic printer according to one of claims 2 to 4 characterised in that the charging units (4, 5) are arranged in mutually opposite relationship.
EP95118275A 1994-12-23 1995-11-21 Electrophotographic printing apparatus for metal sheets Expired - Lifetime EP0718719B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446148A DE4446148C1 (en) 1994-12-23 1994-12-23 Electrophotographic printer for metal foil
DE4446148 1994-12-23

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EP0718719A1 EP0718719A1 (en) 1996-06-26
EP0718719B1 true EP0718719B1 (en) 2000-03-01

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EP95118275A Expired - Lifetime EP0718719B1 (en) 1994-12-23 1995-11-21 Electrophotographic printing apparatus for metal sheets

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DE (2) DE4446148C1 (en)
DK (1) DK0718719T3 (en)
ES (1) ES2142991T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE10224131A1 (en) * 2002-05-29 2003-12-18 Hydro Aluminium Deutschland Foil made of an aluminum material

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EP1080880A1 (en) * 1999-08-20 2001-03-07 Alusuisse Technology & Management AG Package materials with partially disposed application of material

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AU1548088A (en) * 1987-04-03 1988-11-02 Toyo Seikan Kaisha Ltd. Method of multicolor printing metal containers and metal sheets and printed products
JP2845282B2 (en) * 1989-10-12 1999-01-13 株式会社日立製作所 Image transfer device
US5172174A (en) * 1989-11-14 1992-12-15 Konica Corporation Transfer device with insulated shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224131A1 (en) * 2002-05-29 2003-12-18 Hydro Aluminium Deutschland Foil made of an aluminum material

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ES2142991T3 (en) 2000-05-01
EP0718719A1 (en) 1996-06-26
DE4446148C1 (en) 1995-12-21
DK0718719T3 (en) 2000-07-31
DE59507902D1 (en) 2000-04-06

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