[go: up one dir, main page]

EP0570419B1 - Photocopieur a element de transfert en forme de courroie - Google Patents

Photocopieur a element de transfert en forme de courroie Download PDF

Info

Publication number
EP0570419B1
EP0570419B1 EP92903698A EP92903698A EP0570419B1 EP 0570419 B1 EP0570419 B1 EP 0570419B1 EP 92903698 A EP92903698 A EP 92903698A EP 92903698 A EP92903698 A EP 92903698A EP 0570419 B1 EP0570419 B1 EP 0570419B1
Authority
EP
European Patent Office
Prior art keywords
transfer
transfer element
toner images
carrier
zone
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
EP92903698A
Other languages
German (de)
English (en)
Other versions
EP0570419A1 (fr
Inventor
Hans Manzer
Peter Bergmann
Albrecht Gerstner
Otto Ferber
Peter König
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Siemens Nixdorf Informationssysteme 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
Application filed by Siemens Nixdorf Informationssysteme AG filed Critical Siemens Nixdorf Informationssysteme AG
Publication of EP0570419A1 publication Critical patent/EP0570419A1/fr
Application granted granted Critical
Publication of EP0570419B1 publication Critical patent/EP0570419B1/fr
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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • 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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0131—Details of unit for transferring a pattern to a second base
    • 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
    • G03G15/1605—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 using at least one intermediate support
    • G03G15/161—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 using at least one intermediate support with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent

Definitions

  • Printing or copying machine with a ribbon-shaped transfer element with associated electrostatic device for taking over toner images from an intermediate carrier.
  • the invention relates to a printing or copying device for single or multi-color simplex or duplex printing using a ribbon-shaped transfer element and a method for printing on recording media with such a printing or copying device.
  • the front and back are fixed simultaneously.
  • the single sheet printed on one side must be turned over and printed again on the other side, and then it becomes contactless with the roller fixing station, e.g. B. transported via an air cushion.
  • the image information is transferred from the photoconductor to the belt-shaped transfer element in a purely mechanical manner by pressure and rolling.
  • the transfer element is relatively well able to mechanically capture individual toner particles. Print images that consist of several layers of toner, however, are transferred only inadequately or with very poor transfer efficiency.
  • the conventional, proven technology of high-performance printers operating on the electrophotographic principle is the so-called two-component development process, a process in which a mixture of ferromagnetic carrier particles and toner particles is used as the developer mixture.
  • This developer process is inexpensive and is generally used in conjunction with arsenic triselenide photoconductor drums or OPC photoconductor tapes.
  • this technology results in a significant background coloring as well as several layers of toner in the developed printed image, it is not possible to do this purely mechanical transfer to a ribbon-shaped transfer element with very high print quality requirements.
  • the aim of the invention is therefore to provide a printing and copying device with a ribbon-shaped transfer element and an associated printing process which enables the use of conventional known development processes in which the toner in the developed printed image can be arranged in several layers.
  • Another object of the invention is to provide a printing or copying device with a ribbon-shaped transfer element that is simple and reliable, guarantees high print quality and enables simplex and duplex printing.
  • the toner particles of the printed image have enough time to melt on the way from the transfer area of the transfer element to the transfer and fixing area.
  • the result of this is that, in contrast to the roller fixing method, essentially no energy transfer takes place in the transmission and fixing area, but only mechanical rolling. As a result, considerably lower absolute temperatures are necessary for this process.
  • the band-shaped transfer element has a surface that is many times larger than that of the conventional fixing rollers, there is a significantly improved service life with a quality of wear that remains constant over a long period of operation.
  • the record carrier Since the record carrier is no longer brought into contact with the photoconductor, the problem of reliably detaching the record carrier adhering electrostatically to the photoconductor, in particular to a photoconductor drum, no longer occurs. Furthermore, the wear situation of the photoconductor is significantly improved since the defined contact of the ribbon-shaped transfer element to the photoconductor is much gentler than the relatively undefined contact with different record carriers with different cutting degrees, with inclusions and with a possibly occurring paper dust.
  • the recording medium in the transmission and fixing areas is both printed and fixed at the same time. This makes it possible to guide the record carrier on both sides in the entire paper path.
  • the very critical entry into the transfer printing and fixing nip can, in contrast to the conventional roller fixing methods, be optimally designed using appropriate paper guides.
  • pre-printed recording media can also be processed without any problems using conventional printing inks.
  • a second transmission and fixing area downstream of the first transmission and fixing area and by arranging a turning station between the transmission and fixing areas, which is advantageously designed as a stop turning station it is possible to move the front and back to print the back immediately one behind the other. This allows a very simple paper path to be designed without overtaking and waiting loops.
  • the control structure and the mechanical processes are clear and simple. This has a very advantageous effect on operating behavior and ease of servicing.
  • An electrophotographic printing device shown schematically in FIG. 1 contains a band-shaped intermediate carrier 10 in the form of a photoconductor, e.g. B. an OPC tape, which is guided via guide rollers 11 driven by an electric motor.
  • a photoconductor drum can also be arranged.
  • the various units for the electrophotographic process are grouped around the intermediate carrier 10. These are essentially: a charging device LE in the form of a charging corotron for charging the intermediate carrier; a character generator ZG with an LED comb for character-dependent exposure of the intermediate carrier 10; Developer stations EY, EM, EC and EB for coloring the charge-dependent discharged image on the intermediate carrier 10 using the colored toner.
  • the developer station EY contains yellow toner, the developer station EM toner with the color magenta, the developer station EC toner with the color cyan and the developer station EB black toner.
  • a cleaning station RS is provided, with a cleaning brush 13 integrated therein with an associated suction device and an unloading device.
  • the developer stations EY, EM, EC and EB are designed to be interchangeable and can e.g. B. pulled out of the device via slide guides and inserted into the device. They are constructed in the usual way and contain developer rollers 14 for coloring the charge image as well as guide rollers 11/1 to 11/4 which can be swiveled in and out for swiveling the intermediate carrier 10 in and out on the developer rollers 14 via electromagnetic swivel devices 15.
  • the swivel devices 15 can, for. B. as plunger magnets or z. B. be designed as a swing magnet. They are used to individually couple the developer stations EY, EM, EC and EB, controlled by a controller of the device, to the intermediate carrier 10 in order to enable multicolor and monochrome printing.
  • An exposure station B which serves to loosen the developed toner image before transfer printing, is arranged downstream of the developer stations in the direction of movement of the intermediate carrier 10. Instead of an exposure station B, it is also possible to arrange an unloading corotron.
  • the printing device contains a transfer station T, which serves to transfer the toner image onto a belt-shaped transfer element 16.
  • the band-shaped transfer element consists of a temperature-resistant carrier fabric 17, e.g. B. made of glass fibers or similar materials, with an elastic cover layer 18 made of an elastomer arranged thereon.
  • the band-shaped transfer element 16 is guided over guide elements in such a way that the elastic cover layer faces the intermediate carrier 10.
  • the band-shaped transfer element 16 is driven by an electric motor.
  • the transfer station T contains a lower guide roller 20 and an upper guide roller 21, between which the transfer element 16 and the band-shaped intermediate carrier 10 are passed in slight contact.
  • the transfer of the toner image from the belt-shaped intermediate carrier 10 to the belt-shaped transfer element 16 is carried out by electrostatic transfer.
  • This makes it possible to use a two-component developer mixture of toner particles and ferromagnetic carrier particles as the developer mixture for producing the toner image.
  • developer mixtures produce toner images that are built up in multiple layers.
  • toner of a different structure which also produces developed toner images with a multilayer structure.
  • the belt surface of the belt-shaped transfer element 16 is electrostatically charged directly in front of the transfer station T with the transfer zone by means of a charging station 22, which may consist, for example, of a corotron.
  • the corotron 22 can be arranged between two upper guide rollers 21/1, 21/2.
  • the toner image thus transferred to the belt-shaped transfer element 16 is heated, for example with the aid of an infrared heating device 23, until the toner image is sticky. It is then transferred from below to a recording medium 24 in a first transfer printing station U1.
  • the transfer printing station U1 serves both as a transfer printing station and as a fixing station.
  • it contains two rollers, namely an upper roller 25 and a lower roller 26, between which the transfer element 16 and the recording medium are passed.
  • the upper roller 25 consists of a turning device in the form of a suction roller, as z. B. is known from US-A-4 477 176 or from a roller with mechanical gripping devices arranged thereon for gripping the individual sheets (paper clip device). Their function will be explained later.
  • the lower roller 26 is designed to be pivotable on and off with the aid of an electromagnetic device 27. However, it is also possible to design the lower roller 26 as a stationary roller and the upper roller 25 as a roller that can be pivoted on and off. In the pivoted-down state of the lower roller 26, the band-shaped transfer element 16 is guided so that it does not come into contact with the recording medium 24.
  • the driven band-shaped transfer element 16 also passes through a second transfer station U2, which is constructed in accordance with the first transfer station U1.
  • a cleaning roller 19 is arranged downstream of the second transfer printing station U2. It serves to remove the residual toner from the belt-shaped transfer element 16.
  • the belt-shaped transfer element 16 is unloaded via a subsequent unloading station 28 before it is brought to a defined state of charge again via the charging station 22.
  • a paper channel P is provided for feeding the individual sheets 24 from a supply area with supply stacks 29 arranged there to the transfer printing and fixing stations U1 and U2, which contains, as is known, a large number of paper transport rollers which are not shown here for reasons of clarity.
  • the transfer printing and fixing stations U1 and U2 which contains, as is known, a large number of paper transport rollers which are not shown here for reasons of clarity.
  • An alignment zone 30 in which known alignment means, e.g. B. stops etc., a targeted alignment of the single sheets.
  • a paper preheating zone 31 is located immediately upstream of the first transfer printing and fixing station. It serves to separate the individual sheets from the Preheat the toner image onto the cut sheets.
  • the paper preheating zone 31 contains, for example, a multiplicity of pressure rollers 32 with an associated heating device 33 in the form of a heating saddle, the individual sheets being passed between the pressure rollers 32 and the heating saddle 33.
  • the heating saddle can have a metal carrier in which heating elements are arranged.
  • a turning device W which is designed in the form of a stop turning station. In its rear area, it contains a stop bar 34 for aligning the single sheets 24 on their front edge.
  • a stop bar 34 for aligning the single sheets 24 on their front edge.
  • three transport elements arranged one above the other, which are driven by an electric motor and which, in the case shown, consist of paper rollers covering the paper channel P.
  • the paper rollers it is also possible, for. B. to use individual paper transport rollers.
  • the paper transport rollers are divided into a lower 35, a middle 36 and an upper 37 paper transport roller.
  • the upper and lower paper transport rollers rest elastically on the middle paper transport roller 36, the middle paper transport roller 36 being driven by an electric motor 38, namely counterclockwise.
  • the distance between the paper transport rollers 35, 36 and 37 and the stop bar 34 is shorter than the length of the single sheets 24.
  • the single sheets 24 are first transported between the upper and middle transport rollers 36, 37 until they rest against the stop bar 34.
  • the single sheets bulge and their trailing edge is carried along by the central transport roller 37 in the direction of movement of the paper transport roller 37 and thus snaps into the transport area between the lower 35 and the middle 36 paper transport rollers.
  • the single sheets are deflected by deflection elements (not shown here) and fed to the transfer printing and fixing station U2.
  • a merging station 39 Downstream of this second transfer and fixing station U2 is a merging station 39, it is constructed in the usual manner and provides for a necessary merging if, as shown, recording media are guided and printed in parallel in the paper channel ("two up" print mode ") In this case, the individual sheets must be brought together before stacking in a stacking device S.
  • the stacking device S serves as a paper output station and is constructed in such a way that the individual sheets are fed to the stacking device S from below, so that the stacking basket is built up offset from below.
  • the print image is first generated in a conventional manner in the electrophotographic printing unit.
  • This print image is then transferred in the transfer station T from the photoconductor to the heated ribbon-shaped transfer element 16, specifically as described, electrostatically.
  • the print image now transferred to the belt-shaped transfer element melts under the influence of the belt temperature or the additional infrared heating device 23, while it is being transported in the direction of the first transfer printing and fixing station U1.
  • the individual sheets 24 to be printed are guided in a controlled manner by the control device of the printing device in the paper channel P in such a way that they meet the print image adhering to the transfer element 16 in the first transfer printing station U1 with a precise fit.
  • the print image is placed on the recording medium 24, which was previously in the preheating zone 31 was preheated, rolled. This transfer results in a simultaneous fixation of the print information.
  • the recording medium 24 is then realigned in the turning station W, turned over and then transported through the second transfer printing and fixing station U2 in the direction of the stacking device S.
  • the lower roller 26 is pivoted with the aid of an electromagnetic device 27, so that the recording media 24 are freely guided through the second transfer printing and fixing station U2.
  • the back of the recording medium must be printed in the area of the second transfer and fixing station U2.
  • the toner image for the rear side is generated on the intermediate carrier 10 immediately after the generation of the toner image for the front side and is likewise transferred to the belt-shaped transfer element 16 immediately after the transfer of the toner image of the front side.
  • the lower roller 26 is pivoted down with the aid of an electromotive pivoting device 27 and thus runs freely through the transfer printing station.
  • the printing information is not damaged and strikes the turned recording medium 24 in the second transfer printing and fixing station U2. Transfer printing and fixing take place here with the lower roller 26 pivoted.
  • the information is generally transferred in the first transfer printing and fixing station U1.
  • the single sheets can be fed directly one after the other within the framework of a fixed clock window.
  • Duplex printing naturally requires a gap in the feed cycle.
  • the functional sequence corresponds to the sequence described for single-color simplex or duplex operation, only that, depending on the type of color printing, the individual sheets are fed to the corresponding transfer zones via the suction rollers 25 until the corresponding color separations are all transferred to the corresponding side of the single sheet 24.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Color Electrophotography (AREA)

Abstract

Une imprimante ou un photocopieur comprennent un support intermédiaire (10) associé à une station d'enregistrement et de développement (EY, EM, EC, EB) qui génère des images en toner en une ou en plusieurs couleurs sur le support intermédiaire (10). Les images en toner sont électrostatiquement transférées à un élément de transfert (16) en forme de courroie, dans une zone de transfert (T), puis sont imprimées sur la face inférieure de supports d'enregistrement (24), dans des zones de reproduction et de fixation (U1, U2). Des éléments chauffants (23, 31) des images en toner sur l'élément de transfer (16) et/ou du support d'enregistrement (24) sont disposés dans les stations de reproduction et de fixation (U1, U2) afin de faciliter la fixation de l'image reproduite. Une station de renversement (W) est disposée entre les première et deuxième stations de reproduction et de fixation (U1, U2). L'imprimante ou le photocopieur peuvent être exploités dans des modes d'impression sur une ou sur deux faces, en une ou en plusieurs couleurs.

Claims (13)

  1. Dispositif d'impression électrophotographique comportant
    - un support intermédiaire (10) avec un poste d'enre- gistrement et de développement associé (EY, EM, EC, EB) pour produire des images toner multicouches sur le support intermédiaire (10) par encrage à sec du support intermédiaire (10) dans le poste de développement (EY, EM, EC, EB) par un mélange révélateur à deux composants,
    - un élément de transfert en forme de bande (16) avec zone de transfert associée (T), pour le transfert séparé des images toner à partir du support intermédiaire (10),
    - des moyens de transmission électrostatique (22) associés à la zone de transfert (T),
    - une première zone de fixage et de transfert combinée (U1) pour le transfert des images toner de l'élément de transfert (16) sur un support d'enregistrement (24), avec fixage simultanée des images toner sur le support d'enregistrement (24) par cylindrage mécanique de l'élément de transfert (16) sur le support d'enregistrement (24),
    - une voie de transport (P) pour le transport du support d'enregistrement (24) d'une zone de réserve (29) vers la première zone de transfert et de fixage (U1), et
    - des moyens de chauffage (23, 31) pour chauffer les images toner sur l'élément de transfert (16) et/ou pour chauffer le support d'enregistrement (24) avant la première zone de transmission et de fixage (U1).
  2. Dispositif d'impression électrophotographique selon la revendication 1, ayant des moyens de transfert électrostatique (22) qui comportent un dispositif de charge électrostatique (22) placé directement en amont de la zone de transfert (T) dans le sens de transport de l'élément de transfert (16).
  3. Dispositif d'impression électrophotographique selon la revendication 1, ayant des moyens de transfert électrostatique qui comportent un dispositif de charge électrostatique (22) directement associé à la zone de transfert (T), lequel est conçu de telle façon qu'il exerce un effet de force électrostatique sur les particules de toner à travers l'élément de transfert (16).
  4. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 3, ayant des moyens de chauffage (23) destinés à chauffer les images toner sur l'élément de transfert (16), qui comportent un dispositif de chauffage (23) disposé sur le côté des images toner et placé en amont de la première zone de transfert et de fixage (U1) dans le sens de transport de l'élément de transfert (16).
  5. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 4, ayant des moyens de chauffage (31) destinés à chauffer le support d'enregistrement (24), qui comportent une zone de préchauffage (31) dans laquelle sont disposés des éléments chauffants (32, 33), laquelle est placée en amont de la première zone de transfert et de fixage (U1) dans le sens de transport du support d'enregistrement (24).
  6. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 5, ayant une deuxième zone de transfert et de fixage (U2) disposée en aval de la première zone de transfert et de fixage (U1) à une certaine distance dans le sens de déplacement de l'élément de transfert (16), ainsi qu'un poste d'inversion (W) des supports de feuilles d'enregistrement individuelles disposé à la suite de la voie de transport (P) entre la première et la deuxième zone de transfert et de fixage (U1, U2), la première zone de transfert et de fixage (U1) comportant au moins des moyens (27) qui permettent d'arrêter en cas de besoin le transfert d'images toner au support d'enregistrement (24).
  7. Dispositif d'impression électrophotographique selon la revendication 6 ayant un poste d'inversion (W) comportant
    - un rebord de butée (34) disposé dans une zone arrière du poste d'inversion (W) pour orienter les feuilles individuelles par leur bord avant,
    - superposés dans un plan inférieur, un plan médian et un plan supérieur dans une zone avant du poste d'inversion (W), des éléments de transport inférieur (35), médian (36) et supérieur (37) entraînés par moteur, la distance entre les éléments de transport et le rebord de butée (34) étant inférieure à la longueur des feuilles individuelles et que les éléments de transport (36, 37, 38) agissant de telle façon que, pour inverser les feuilles individuelles (24), les feuilles individuelles (24) sont d'abord transportées entre les éléments de transport supérieur et médian (36, 37) jusqu'à ce qu'elles s'appuient contre le rebord de butée (34), qu'ensuite, les feuilles individuelles (24) s'arc-boutent sous l'effet des éléments de transport (36, 37) qui continuent à agir, et que leur bord arrière guidé par les éléments de transport médian (36) bascule dans la zone entre les éléments de transport médian (36) et inférieur (35), de sorte que ces éléments de transport (35, 36) saisissent le bord arrière des feuilles individuelles (24) et les transportent hors du poste d'inversion.
  8. Dispositif d'impression électrophotographique selon la revendication 6, ayant une zone de transfert et de fixage (U1, U2) qui comporte un couple de cylindres constitué d'un cylindre fixe (25) et d'un cylindre presseur (26) enserré par l'élément de transfert qui peut être appliqué ou écarté par pivotement, entre lesquels est guidé le support d'enregistrement.
  9. Dispositif d'impression électrophotographique selon la revendication 6, avec une zone de transfert et de fixage (U1, U2) qui comporte un couple de cylindres, constitué d'un cylindre fixe (26) et d'un cylindre (25) enserré par l'élément de transfert (16) qui peut être appliqué ou écarté par pivotement, entre lesquels est guidé le support d'enregistrement (24).
  10. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 8, ayant une zone de transfert et de fixage (U1, U2) qui comporte un cylindre d'aspiration (25) ou un cylindre avec un dispositif mécanique d'agrafage du papier, qui saisit le support d'enregistrement (24) et l'amène à nouveau dans la zone de transfert et de fixage (U1, U2).
  11. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 10, ayant un élément de transfert (16) qui comporte un tissu de support (17) résistant à la température et ayant une couche de finition (18) élastique.
  12. Dispositif d'impression électrophotographique selon l'une quelconque des revendications 1 à 11, avec une voie d'impression (P) qui est conçue pour le transport en parallèle de plusieurs feuilles individuelles (24) disposées les unes à côté des autres.
  13. Procédé destiné à l'impression de supports d'enregistrement dans des dispositifs d'impression électrophotographique ayant les caractéristiques suivantes:
    - production d'une série d'images toner multicouches sur un support intermédiaire (10) par encrage à sec du support intermédiaire (10) à l'aide d'un mélange révélateur à deux composants,
    - transfert électrostatique (22) des images toner sur un élément de transfert (16) en forme de bande,
    - chauffage des images toner sur l'élément de transfert (16) et/ou chauffage d'un support d'enregistrement (24) recevant les images toner, et
    - transfert des images toner chauffées et collantes sur un support d'enregistrement (24) avec fixage simultanée des images toner sur le support d'enregistrement (24) par cylindrage mécanique de l'élément de transfert (16) sur le support d'enregistrement (24).
EP92903698A 1991-02-05 1992-02-03 Photocopieur a element de transfert en forme de courroie Expired - Lifetime EP0570419B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP91101539 1991-02-05
EP91101539 1991-02-05
PCT/EP1992/000224 WO1992014192A1 (fr) 1991-02-05 1992-02-03 Photocopieur a element de transfert en forme de courroie

Publications (2)

Publication Number Publication Date
EP0570419A1 EP0570419A1 (fr) 1993-11-24
EP0570419B1 true EP0570419B1 (fr) 1994-07-20

Family

ID=8206371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92903698A Expired - Lifetime EP0570419B1 (fr) 1991-02-05 1992-02-03 Photocopieur a element de transfert en forme de courroie

Country Status (5)

Country Link
US (1) US5408302A (fr)
EP (1) EP0570419B1 (fr)
JP (1) JPH06504855A (fr)
DE (1) DE59200300D1 (fr)
WO (1) WO1992014192A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203265C2 (de) * 1991-02-25 1996-12-19 Siemens Nixdorf Inf Syst Druck- oder Kopiergerät mit beidseitig eines Aufzeichnungsträger-Transportkanals angeordneten Zwischenträgern für ein- oder mehrfarbigen Simplex- oder Duplexdruck
DE59400956D1 (de) * 1993-05-19 1996-12-05 Siemens Nixdorf Inf Syst Elektrografische druckeinrichtung zum bedrucken von bandförmigen aufzeichnungsträgern unterschiedlicher bandbreite
DE69432851T2 (de) * 1993-12-09 2004-05-19 Nec Corp. Verfahren und Gerät zum Erzeugen von Bildern auf beiden Seiten eines Aufzeichnungspapiers ohne dieses Papier zu wenden
EP0671668B1 (fr) * 1994-03-11 1998-04-29 Xeikon Nv Appareil à imprimer électrostatographique pour la formation d'une image de toner sur un élément de récepteur en forme de bande
JP3206290B2 (ja) * 1994-04-15 2001-09-10 日立工機株式会社 画像形成システム
DE4420196C1 (de) * 1994-06-09 1995-12-14 Siemens Nixdorf Inf Syst Einrichtung zum Vorheizen von Einzelblättern in einem elektrografischen Druck- oder Kopiergerät
JPH0815935A (ja) * 1994-06-30 1996-01-19 Fujitsu Ltd 多色画像形成装置
DE59505607D1 (de) * 1994-11-04 1999-05-12 Oce Printing Systems Gmbh Multifunktionale elektrografische druckeinrichtung
USRE37644E1 (en) 1994-11-04 2002-04-09 Oce Printing Systems Gmbh Multi-functional electrographic printer device
US5570172A (en) * 1995-01-18 1996-10-29 Xerox Corporation Two up high speed printing system
US6108513A (en) * 1995-04-03 2000-08-22 Indigo N.V. Double sided imaging
US5612773A (en) * 1995-08-18 1997-03-18 Xerox Corporation Intermediate transfer member
KR970028908A (ko) * 1995-11-24 1997-06-24 엘 드 샴펠라에레 싱글 패스 다색 정전 사진 프린터
JPH09171306A (ja) * 1995-12-19 1997-06-30 Fuji Xerox Co Ltd 画像形成装置
US5710964A (en) * 1996-07-29 1998-01-20 Eastman Kodak Company Mechanism for facilitating removal of receiver member from an intermediate image transfer member
US6075965A (en) * 1996-07-29 2000-06-13 Eastman Kodak Company Method and apparatus using an endless web for facilitating transfer of a marking particle image from an intermediate image transfer member to a receiver member
US6271870B1 (en) * 1999-04-22 2001-08-07 Hewlett-Packard Company Producing photographic images on a matte laser printer
GB9923496D0 (en) * 1999-10-06 1999-12-08 Xeikon Nv Single-pass multi-colour printer and method of printing
US6272310B1 (en) * 1999-10-20 2001-08-07 Lexmark International, Inc. Toner fuser system having post-fuser media conditioner
US6466761B1 (en) 2000-11-14 2002-10-15 Xerox Corporation Duplex transfer apparatus and processes
US6785501B2 (en) * 2001-04-03 2004-08-31 Pfu Limited Transfer-and-fixation system with preheated printing medium for creating images using liquid-development electrophotographic apparatus
US6983117B2 (en) * 2002-08-23 2006-01-03 Ricoh Company, Ltd. Image forming apparatus configured for double sided printing
US7386264B2 (en) * 2005-09-23 2008-06-10 Lexmark International, Inc. Fusing system including a backup belt assembly

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885955A (en) * 1955-05-11 1959-05-12 Haloid Xerox Inc Xerographic machine
US2990278A (en) * 1955-12-29 1961-06-27 Haloid Xerox Inc Method and apparatus for transferring and fixing xerographic images
US3548783A (en) * 1968-08-12 1970-12-22 Xerox Corp Paper transport-sheet turner
DE2164989A1 (de) * 1970-12-30 1972-07-20 Minolta Camera Kk Elektrophotographisches Kopiergerät des Übertragungstypus
US3893761A (en) * 1972-11-02 1975-07-08 Itek Corp Electrophotographic toner transfer and fusing apparatus
US3923392A (en) * 1974-01-02 1975-12-02 Itek Corp Electrophotographic copier
US3947113A (en) * 1975-01-20 1976-03-30 Itek Corporation Electrophotographic toner transfer apparatus
JPS5423543A (en) * 1977-07-22 1979-02-22 Canon Inc Image former
JPS55100582A (en) * 1979-01-25 1980-07-31 Ricoh Co Ltd Toner image transferring method
US4526459A (en) * 1979-12-26 1985-07-02 Xerox Corporation Multi-roll fusing system
JPS5741673A (en) * 1980-08-25 1982-03-08 Konishiroku Photo Ind Co Ltd Copying device
US4455079A (en) * 1981-11-16 1984-06-19 Konishiroku Photo Industry Co., Ltd. Image reproducing apparatus
US4537493A (en) * 1984-02-01 1985-08-27 Eastman Kodak Company Copy sheet positioning apparatus
US4477176A (en) * 1983-12-27 1984-10-16 Eastman Kodak Company Apparatus for producing multiple image simplex and duplex copies in a single pass
US4708460A (en) * 1986-07-25 1987-11-24 Xerox Corporation Simultaneous transfer and fusing in electrophotography
JPS63263877A (ja) * 1987-04-21 1988-10-31 Konica Corp カラ−画像形成装置
US4912514A (en) * 1987-05-19 1990-03-27 Citizen Watch Co., Ltd. Electrophotographic printer
US4743939A (en) * 1987-06-01 1988-05-10 Xerox Corporation Intermediate transfer apparatus
US4796066A (en) * 1987-07-16 1989-01-03 Honeywell Bull Inc. Printer apparatus having two-sided printing capability
US4796048A (en) * 1987-11-23 1989-01-03 Xerox Corporation Resilient intermediate transfer member and apparatus for liquid ink development
JP2515832B2 (ja) * 1987-12-28 1996-07-10 シャープ株式会社 カラ―複写機
US4931839A (en) * 1988-03-11 1990-06-05 Colorocs Corporation Transfer system for electrophotographic print engine
JP2681995B2 (ja) * 1988-04-21 1997-11-26 ミノルタ株式会社 作像装置
JP2535388B2 (ja) * 1988-08-10 1996-09-18 シャープ株式会社 原稿供給装置を備える複写機
US4992833A (en) * 1989-08-10 1991-02-12 Eastman Kodak Company Fixing method and apparatus having a transfer-fixing chilling drum
US5208638A (en) * 1990-06-29 1993-05-04 Olin Corporation Intermediate transfer surface and method of color printing
US5233397A (en) * 1992-08-24 1993-08-03 Xerox Corporation Thermal transfer apparatus

Also Published As

Publication number Publication date
WO1992014192A1 (fr) 1992-08-20
US5408302A (en) 1995-04-18
EP0570419A1 (fr) 1993-11-24
JPH06504855A (ja) 1994-06-02
DE59200300D1 (de) 1994-08-25

Similar Documents

Publication Publication Date Title
EP0570419B1 (fr) Photocopieur a element de transfert en forme de courroie
EP0965070B1 (fr) Dispositif d'impression et de copie pour realiser une impression monochrome ou en couleurs, adaptee a des performances, sur un ou deux cotes d'un support
EP0699315B1 (fr) Dispositif d'impression electrographique de supports d'enregistrement sous forme de bandes de differentes largeurs
EP0154695B1 (fr) Dispositif non-mécanique d'impression ou de copiage pour plusieurs couleurs et recto-verso
DE69003208T2 (de) Verfahren und gerät zum herstellen von elektrofotografischen abdrucken von fotografischen negativen.
DE3341631A1 (de) Aufzeichnungsvorrichtung
DE4213236C2 (de) Kopiergerät
EP0789860B1 (fr) Dispositif d'impression electrographique multifonction
DE69110360T2 (de) Elektrophotographisches Druckgerät.
EP0608264B1 (fr) Imprimante ou photocopieur ayant un dispositif d'impression des deux cotes d'un support d'enregistrement
EP0946902B1 (fr) Dispositif d'impression electrographique comportant des elements d'impression opposes les uns aux autres
EP0602087B1 (fr) Systeme electrophotographique d'impression simultanee double face
EP0551288B1 (fr) Poste de thermofixage avec transport par bande
EP0478820B1 (fr) Imprimante ou copieur pour l'impression simple face et double face en une ou plusieurs couleurs
DE19511529A1 (de) Blatttransportvorrichtung
EP0771436B1 (fr) Dispositif d'impression multifonction pour imprimer des supports d'enregistrement se presentant sous forme de bandes
DE4447193A1 (de) Verfahren zum Erzeugen zusammengesetzter Tonerbilder
EP0772529A1 (fr) Station de duplication permettant d'imprimer en parallele deux bandes de support d'enregistrement
DE3874326T3 (de) Elektrostatographisches verfahren und gerät zur herstellung von mehrfarbigen zweiseitigen kopien.
DE4203265C2 (de) Druck- oder Kopiergerät mit beidseitig eines Aufzeichnungsträger-Transportkanals angeordneten Zwischenträgern für ein- oder mehrfarbigen Simplex- oder Duplexdruck
EP1488289B1 (fr) Procede et dispositif d'impression de feuilles individuelles au moyen d'un ensemble inverseur
EP0946901B1 (fr) Dispositif d'impression electrographique comportant deux points de duplication
WO2007082755A1 (fr) Imprimante ou photocopieuse pour l'impression de supports à propriétés mécaniques différentes
DE69413137T2 (de) Verfahren und Vorrichtung zur Bilderzeugung auf einem Aufzeichnungsträger
DE10060712A1 (de) Verfahren und Vorrichtung zur Übertragung von Toner von einem primären bilderzeugenden Element in windschiefer Stellung auf ein Übergabeelement

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: 19930701

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

17Q First examination report despatched

Effective date: 19931215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REF Corresponds to:

Ref document number: 59200300

Country of ref document: DE

Date of ref document: 19940825

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

Effective date: 19940926

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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19970120

Year of fee payment: 6

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: OCE PRINTING SYSTEMS GMBH

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: 19980901

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

Effective date: 19980901

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050203

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

Ref country code: GB

Payment date: 20070219

Year of fee payment: 16

Ref country code: DE

Payment date: 20070219

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20070216

Year of fee payment: 16

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

Effective date: 20080203

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081031

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: 20080902

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: 20080229

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

Ref country code: GB

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

Effective date: 20080203