EP0934554B1 - Printer with two printing units - Google Patents

Printer with two printing units Download PDF

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Publication number
EP0934554B1
EP0934554B1 EP97945775A EP97945775A EP0934554B1 EP 0934554 B1 EP0934554 B1 EP 0934554B1 EP 97945775 A EP97945775 A EP 97945775A EP 97945775 A EP97945775 A EP 97945775A EP 0934554 B1 EP0934554 B1 EP 0934554B1
Authority
EP
European Patent Office
Prior art keywords
printing
sheet material
diverter
transfer
transport path
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
EP97945775A
Other languages
German (de)
French (fr)
Other versions
EP0934554A1 (en
Inventor
Georg BÖHMER
Joseph Dietl
Hans Hahn
Bernward Heller
Hubert Mugrauer
Otto Olbrich
Reinhold Rigauer
Otto Rotheimer
Rudolf Seeberger
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
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Priority to EP99113945A priority Critical patent/EP0977095B1/en
Publication of EP0934554A1 publication Critical patent/EP0934554A1/en
Application granted granted Critical
Publication of EP0934554B1 publication Critical patent/EP0934554B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
    • G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
    • 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
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00016—Special arrangement of entire apparatus
    • G03G2215/00021—Plural substantially independent image forming units in cooperation, e.g. for duplex, colour or high-speed simplex
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0103—Plural electrographic recording members

Definitions

  • the invention relates to a device, in particular a printer or Copier, with two essentially similar electrographic printing units, each with an image pattern print on sheet material, with a Input section over which the sheet material is separated can be fed in succession, and with an output section, over which the printed sheet-shaped material individually is output one after the other.
  • Such electrophotographic printers are for example from DE 34 16 252 A1, EP 0 104 022 A2, DE-PS 1,280,605, DE 34 07 847 A1 or WO 91/13386.
  • high printing performance can also be achieved
  • Duplex operation can be achieved as long as both printing units work properly.
  • a disadvantage of those in the described publications is devices however, that in the event of a failure of one of the Printing units a drastic reduction in the performance of the Conditional duplex operation. A sheet that is in duplex mode to be printed on both sides must then namely be accelerated several times in the opposite direction printed on both sides by the one remaining printing unit to be able to.
  • Another printing device is known from US Pat. No. 5,208,640 known, which contains several printing units.
  • the printing units are connected to each other via a ring system, one common turning device with a switch for everyone Printing units is used. If the turning device fails, for example because of a switching error in the switch, so duplex operation is no longer possible.
  • the object of the invention is a device, in particular a device Specify printer or copier that has high printing performance or copying performance, especially in duplex mode Has.
  • two are essentially similarly designed printing units are used.
  • the components for these printing units e.g. the electronic control, the Developer units, the toner supply and discharge devices etc., can be kept almost unchanged.
  • Each Printing unit on its own therefore has a very high level of operational reliability.
  • Both printing units use a common one Input section through which the sheet material is fed becomes.
  • Both printing units also use one together Output section for discharging the printed sheet Materials. This makes the new device very compact and can be produced with little effort. Because of the printing capacity of the two printing units is significantly increased.
  • one of one of the printed material, sheet-shaped material same printing unit can be fed again in the same direction like in the first printing process.
  • first transfer printing transport path for the first printing unit and a separate one second transfer printing transport route provided for the second printing unit.
  • the transfer printing for both printing units takes place with the same Speed. Because each printing unit has its own transfer printing path can, if a printing unit fails sheet material further printed with the other printing unit become.
  • the input section a switch that contains sheet-like material either the first transfer printing route or the second Transfer printing transport route feeds.
  • the simplex printing mode is implemented with one color, i.e. supplied sheet material, e.g. Cut sheets Paper is from the first printing unit or from the second printing unit printed on one side.
  • the Soft sheet material alternating the first transfer printing route and the second transfer printing transport path. Because every The sheet-like printing unit with the same transfer printing speed Material printed and two printing units arranged in parallel are, the overall printing performance doubles Device. Single sheets with double Printing speed fed and removed again.
  • Another exemplary embodiment provides that the first transfer printing transport route and through the second transfer printing path a connecting channel are connected, through which leaf-shaped Material in one or both transport directions is eligible. These measures can cause printed material from the first printing unit to the second printing unit and from the second Printing unit to be fed to the first printing unit to it print. A return is therefore through the connecting channel created which the two printing units together connects, which enables diverse printing processes.
  • leaf-shaped Material during transport from the first transfer printing path to second transfer printing transport path is turned.
  • each printing unit the front and also the back printing on a single sheet.
  • Developer stations with different colors used so there can be two on each side of the single sheet Image patterns can be printed with two different colors, i.e. it can do a so-called two-color duplex operation, too Called duplex color spot operation.
  • a printer system specified, in which two similar, previously described Devices are connected by a transfer device, which is the sheet material printed by the first device to the second, similar device. If any of these contains two different colored printing units, so can Single sheets printed on both sides with four colors become.
  • a transfer device which is the sheet material printed by the first device to the second, similar device.
  • a high-performance printer 10 is shown in FIG for fast printing of single sheets of paper.
  • the high performance printer 10 includes a first, lower one Printing unit D1 and a second, upper printing unit D2. Both Printing units D1, D2 work according to the known electrographic Process with the same transfer printing speed.
  • the Fixing devices are connected downstream of printing units D1, D2, schematically in Figure 1 by two pairs of rollers 12, 14th are indicated.
  • High-performance printer 10 On the output side is to High-performance printer 10 connected to a paper output 30, which contains a plurality of output containers 32 to 36. Furthermore are two output channels 38, 40 are provided, via the single sheets can be issued to processing stations. The high-performance printer 10 gives the printed single sheets via the output section 42.
  • Transport routes are located inside the high-performance printer 10 arranged for the transport of the single sheets through which different operating modes of the high-performance printer become.
  • the printing units D1, D2 are transfer printing transport routes 44, 46 assigned, each by drives are set so that the single sheets fed to the Printing units D1, D2 have their transfer printing speed. Both Transfer printing transport paths 44, 46 are via a connecting channel 48 connected to each other.
  • the transport route around the first Printing unit D1 is to a ring R1 through a feed channel 50 added, about which also single sheets from the input section 28 can be fed to the second transfer printing transport path 46.
  • the transport route for the second printing unit D2 is similar Way to a ring R2 through a discharge channel 52 added, about the single sheets printed by printing unit D1 can be fed to the output section 42.
  • first switch W1 arranged, which enables cut sheets from the input section 28 optionally the first transfer printing transport path 44 or be fed to the feed channel 50.
  • Another variant is that on the feed channel 50 in the direction the switch W1 transported single sheets on the first transfer printing path 44 can be supplied.
  • a second switch W2 and a third switch W3 arranged at the ends of the connecting channel 48 and connect the adjacent transport routes 44, 48, 52 or 46, 48, 50.
  • a fourth turnout W4 is nearby of the output section 42 and connects the adjacent ones Transport routes.
  • the paper output 30 contains a fifth switch W5, which works as a turning device. Furthermore is still to point to a control device 54, which via a Soft W6 reject single sheets are fed.
  • FIG. 2 shows schematically the simplex printing with only one Printing unit shown. With this simplex print only one Printed on one side of a single sheet.
  • the single sheet arrives via the input section 28 and the corresponding switched Turnout W1 along arrow Pl to the first transfer printing path 44 and is printed on the printing unit D1. Then will the single sheet along the discharge channel 52 (arrow P2) the output section 42 is output to the paper output 30 (Arrow P3).
  • FIG. 3 shows the simplex printing with the upper, second printing unit D2.
  • the single sheet is transported via the Feed channel 50 (arrow P4), the second transfer printing transport path (Arrow P5) to paper output 30 (arrow P6).
  • FIG 4 shows schematically the transport of the Single sheets.
  • the switch W1 leads alternately to the feed channel 50 or the first transfer printing path 44 single sheets to (arrows P7, P8).
  • the single sheets are on their transport up to the printing units D1, D2 on transfer printing speed braked, there each printed on the front and then further promoted to switch W4.
  • the switch W4 issued at a distance from each other and in the Paper output 30 in sequence with at least double Transfer printing speed transported according to arrow P11 can be.
  • alternating simplex printing is therefore provided according to the invention that in. the paper input 16 the single sheets for the input section 28 with at least twice the transfer speed of the printing units D1, D2 be fed.
  • too Single sheets also at least twice the speed promoted and filed. Through these measures meet the single sheets at the common input section 28 and at the common output section 42 without that a collision of single sheets and consequently a paper jam can occur.
  • the transport routes are preferred for the single sheets and the first printing unit Dl the single sheets fed to the second printing unit D2 are symmetrical designed or at least the same length, so that on both Transport routes the single sheets with the same speed profile can be slowed down and accelerated. This makes it possible to have the necessary for transportation Build drives and devices in the same way. Farther it is possible to use similar controls.
  • FIG. 5 shows schematically the duplex printing operation in which the single sheets are printed on both sides.
  • the input section 28 single sheets are fed by the first switch W1 fed to the first transfer printing transport path 44 (Arrow P13).
  • the respective single sheet After printing by the printing unit D1 the respective single sheet a turning distance according to the arrow P14 conveyed beyond the turnout W2. This turning range is part of the discharge channel 52.
  • the conveying direction reversed according to arrow P15, and the switch W2 conducts then the single sheet according to arrow P16 in the connection channel 48.
  • the single sheet is then in the turnout W3 Direction of arrow P17 to the second transfer printing path 46 redirected.
  • the printing unit D2 is therefore not yet printed Back of the single sheet fed for printing.
  • the switch W2 works as a turning device, around the printing unit D2 the back of the single sheet feed.
  • the turnout W3 can also be used be used.
  • the single sheet leaving the printing unit D1 is then on the switch W2, the connecting channel 48th the turnout W3 and then for a short turning distance the feed channel 50 in the direction of the switch W1.
  • the transport direction is reversed and the switch W3 directs the single sheet in the direction of the printing unit D2 with its back up.
  • FIG. 6 schematically shows a further operating mode, the two-color simplex printing, where the front of a single sheet printed with two image samples of different colors becomes.
  • the two printing units D1, D2 print different image patterns Colour.
  • two-color simplex printing the single sheet is turned over to the switch W1 Printing unit D1 fed (arrow P25). Then that will Single sheet over the switch W2 the connecting channel 48 without Turn and then fed to the printing unit D2 via the switch W3 (Arrows P26, P27).
  • the printing unit D2 prints the front with a different color from the printing unit D1 Colour. Then the single sheet is on the switch W4 output to paper output 30 (arrow P28).
  • Figure 7 shows schematically the transport path of a single sheet in the two-color duplex printing mode, in which the Front and back of a single sheet with picture patterns different colors can be printed. requirement for this is that the printing units D1 and D2 have different colors Print images.
  • Arrows P25, P26, P27 and P28 illustrate the transport route. Then the cut sheet again fed to the printing unit D1.
  • the arrows P29 up to P36 illustrate the transport path of the single sheet for printing on the back. So that this back of the printing unit D1 is fed must on the transport route between the Printing unit D2 and printing unit D1 turned the single sheet become. This turning can e.g.
  • the turning takes place with the help of Turnout W4, i.e. the single sheet is initially for a short Then transported turning path towards the turnout W5 the transport direction reversed and the single sheet in the direction the switch W2 further promoted.
  • Turnout W4 i.e. the single sheet is initially for a short Then transported turning path towards the turnout W5 the transport direction reversed and the single sheet in the direction the switch W2 further promoted.
  • After transportation to the Paper output 30 according to arrow P36 is another Turn through the turnout W5 and then the right side Storage of the double-sided printed with two color images each Single sheet.
  • Two-color duplex printing can be done in the following manner.
  • the cut sheet is fed from the input section 28 the switch W1 fed to the printing unit D1, its front printed and then over turnouts W2 and W3 headed briefly towards the turnout W1.
  • After passing the switch W3 becomes the transport direction in the direction Printing unit D2 changed and the single sheet on the transfer printing transport route 46 funded.
  • the switch W3 thus serves as a turning station.
  • the back of the Single sheet printed.
  • the single sheet is over the Switches W4, W2, W3 and W1 again fed to the first printing unit D1, to now print on the back.
  • the single sheet must be used for this.
  • switch W4 being conveyed briefly towards switch W5, the direction of transport reversed and in the direction of turnout W2 Condition is transported.
  • the switches W2 and W3 fed to the printing unit D2 it is turned. Now the front side of the printing unit D2 printed. Then the single sheet over the switch W4 led to storage compartments 32 to 36. Now that it's in the correct position, i.e. upside down in the tray 30 arrives, it does not have to be turned through the turnout W5 again become.
  • FIG. 8 shows the arrangement of two high-performance printers 10 and 10 'to a printing system 55.
  • the two high-performance printers 10 and 10 ' are constructed in the same way, the individual Components therefore do not have to be explained again.
  • a transfer device 56 Between the output channel 38 of the first high performance printer 10 and the external paper input channel 26 of the second High performance printer 10 'is a transfer device 56 arranged, which single sheets from the high-performance printer 10th to the high-performance printer 10 '.
  • Any high performance printer 10, 10 ' can be the operating modes already described Simplex printing, alternative simplex printing, two-color simplex printing, Realize single-color duplex printing and two-color duplex printing.
  • both High-performance printers work in two-color simplex mode
  • Printing system 55 a four-color duplex operation can be realized i.e. the front and the back can each can be printed with four different colored image patterns.
  • the printing system 55 can be expanded by at least another high-performance printer of the type of high-performance printer 10 connected to the high-performance printer 10 ' becomes. In this way, all technical Possibilities of high-performance printers an n-color Duplex printing is possible, on the front and Back of a single sheet an image pattern with n different Colors are printed, where n is any is an integer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Handling Of Cut Paper (AREA)

Description

Die Erfindung betrifft ein Gerät, insbesondere Drucker oder Kopierer, mit zwei im wesentlichen gleichartigen elektrografischen Druckwerken, welche jeweils ein Bildmuster auf ein blattförmiges Material drucken, mit einem Eingabeabschnitt, über den das blattförmige Material einzeln nacheinander zuführbar ist, und mit einem Ausgabeabschnitt, über den das bedruckte blattförmige Material einzeln nacheinander ausgegeben wird.The invention relates to a device, in particular a printer or Copier, with two essentially similar electrographic printing units, each with an image pattern print on sheet material, with a Input section over which the sheet material is separated can be fed in succession, and with an output section, over which the printed sheet-shaped material individually is output one after the other.

Derartige elektrofotografische Drucker sind beispielsweise aus der DE 34 16 252 Al, der EP 0 104 022 A2, der DE-PS 1,280,605, der DE 34 07 847 Al oder der WO 91/13386 bekannt. Mit derartigen Druckern kann eine hohe Druckleistung auch im Duplex-Betrieb erreicht werden, solange beide Druckwerke ordnungsgemäß funktionieren. Nachteilig bei den in den genannten Veröffentlichungen beschriebenen Geräten ist jedoch, daß sie im Falle eines Ausfalls von einem der Druckwerke eine drastische Reduzierung der Leistung des Duplex-Betriebes bedingen. Ein Blatt, das im Duplex-Betrieb auf beiden Seiten bedruckt werden soll, muß dann nämlich mehrmals in entgegengesetzter Richtung beschleunigt werden um von dem einen verbleibenden Druckwerk beidseitig bedruckt werden zu können.Such electrophotographic printers are for example from DE 34 16 252 A1, EP 0 104 022 A2, DE-PS 1,280,605, DE 34 07 847 A1 or WO 91/13386. With such printers, high printing performance can also be achieved Duplex operation can be achieved as long as both printing units work properly. A disadvantage of those in the described publications is devices however, that in the event of a failure of one of the Printing units a drastic reduction in the performance of the Conditional duplex operation. A sheet that is in duplex mode to be printed on both sides must then namely be accelerated several times in the opposite direction printed on both sides by the one remaining printing unit to be able to.

Aus der US 5,150,167 ist ein Druckgerät bekannt, das zwei Druckwerke enthält. Eines der Druckwerke hat dabei einen Prioritätsstatus. Blätter, die im untergeordneten Druckwerk bedruckt wurden, können dabei im Prioritätsdruckwerk zusätzlich bedruckt werden. Fällt jedoch das Prioritätsdruckwerk aus, so ist kein Doppeldruck und insbesondere kein Duplexdruck möglich. From US 5,150,167 a printing device is known, the two Contains printing units. One of the printing units has one Priority status. Sheets in the subordinate printing unit can be printed in the priority printing unit can also be printed. However, it does Priority printing unit off, so there is no double printing and especially no duplex printing possible.

Aus der US 5,208,640 A ist eine weitere Druckvorrichtung bekannt, die mehrere Druckwerke enthält. Die Druckwerke sind über ein Ringsystem miteinander verbunden, wobei eine gemeinsame Wendeeinrichtung mit einer Weiche für alle Druckwerke verwendet wird. Fällt die Wendeeinrichtung aus, beispielsweise wegen eines Schaltfehlers in der Weiche, so ist ein Duplex-Betrieb nicht mehr möglich.Another printing device is known from US Pat. No. 5,208,640 known, which contains several printing units. The printing units are connected to each other via a ring system, one common turning device with a switch for everyone Printing units is used. If the turning device fails, for example because of a switching error in the switch, so duplex operation is no longer possible.

Es ist Aufgabe der Erfindung, ein Gerät, insbesondere einen Drucker oder einen Kopierer anzugeben, der eine hohe Druckleistung bzw. Kopierleistung, insbesondere im Duplex-Betrieb hat.The object of the invention is a device, in particular a device Specify printer or copier that has high printing performance or copying performance, especially in duplex mode Has.

Diese Aufgabe wird für das eingangs genannte Gerät dadurch gelöst, daß im Gerät ein im wesentlichen gleichartiges zweites Druckwerk vorgesehen ist, dem über den gemeinsamen Eingabeabschnitt blattförmiges Material zuführbar ist, daß das vom zweiten Druckwerk bedruckte blattförmige Material über den gemeinsamen Ausgabeabschnitt ausgegeben wird und daß die beiden Umdruck-Transportwege der beiden Druckwerke jeweils über Verbindungswege zu zwei Ringsystemen verbunden sind. An jedem der beiden Ringe ist jeweils eine Weiche vorgesehen, durch die blattförmiges Material unabhängig von der jeweils anderen Weiche in dem zugeordneten Ring wendbar ist.This task is for the device mentioned above solved that in the device a substantially similar second Printing unit is provided, via the common input section sheet-like material can be supplied that the second printing unit printed sheet material over the common output section is output and that the two transfer printing transport routes of the two printing units in each case are connected via connecting paths to two ring systems. On a switch is provided for each of the two rings, due to the sheet-shaped material regardless of each other switch in the assigned ring is reversible.

Bei dem Gerät nach der Erfindung werden zwei im wesentlichen gleichartig aufgebaute Druckwerke eingesetzt. Die Komponenten für diese Druckwerke, z.B. die elektronische Ansteuerung, die Entwicklereinheiten, die Tonerzuführ- und Abführeinrichtungen etc., können nahezu unverändert beibehalten werden. Jedes Druckwerk für sich alleine hat also eine sehr hohe Betriebszuverlässigkeit. Beide Druckwerke nutzen einen gemeinsamen Eingabeabschnitt, über den das blattförmige Material zugeführt wird. Ebenso benutzen beide Druckwerke gemeinsam einen Ausgabeabschnitt zum Abführen des bedruckten blattförmigen Materials. Dadurch ist das neue Gerät sehr kompakt aufgebaut und kann mit geringem Aufwand hergestellt werden. Aufgrund der beiden Druckwerke ist die Druckleistung deutlich erhöht.In the device according to the invention two are essentially similarly designed printing units are used. The components for these printing units, e.g. the electronic control, the Developer units, the toner supply and discharge devices etc., can be kept almost unchanged. Each Printing unit on its own therefore has a very high level of operational reliability. Both printing units use a common one Input section through which the sheet material is fed becomes. Both printing units also use one together Output section for discharging the printed sheet Materials. This makes the new device very compact and can be produced with little effort. Because of the printing capacity of the two printing units is significantly increased.

Durch das erfindungsgemäße Ringsysstem ist ein von einem der beiden Druckwerke bedrucktes, blattförmiges Material demselben Druckwerk erneut in derselben Richtung zuführbar wie im ersten Druckvorgang.Due to the ring system according to the invention one of one of the printed material, sheet-shaped material same printing unit can be fed again in the same direction like in the first printing process.

Gemäß einer Weiterbildung der Erfindung ist ein erster Umdruck-Transportweg für das erste Druckwerk und ein separater zweiter Umdruck-Transportweg für das zweite Druckwerk vorgesehen. Der Umdruck für beide Druckwerke erfolgt mit derselben Geschwindigkeit. Da jedes Druckwerk einen eigenen Umdruck-Transportweg hat, kann bei Ausfall eines Druckwerks dennoch blattförmiges Material weiter mit dem anderen Druckwerk bedruckt werden.According to a development of the invention, there is a first transfer printing transport path for the first printing unit and a separate one second transfer printing transport route provided for the second printing unit. The transfer printing for both printing units takes place with the same Speed. Because each printing unit has its own transfer printing path can, if a printing unit fails sheet material further printed with the other printing unit become.

Weiterhin besonders vorteilhaft ist es, wenn die beiden Ringe über zwei dreiwegige Weichen verbunden sind. Hierdurch entsteht eine Vielzahl von Transportwegen. It is also particularly advantageous if the two rings are connected via two three-way switches. Hereby creates a variety of transport routes.

Eine Ausführungsform der Erfindung sieht vor, daß der Eingabeabschnitt eine Weiche enthält, die blattförmiges Material entweder dem ersten Umdruck-Transportweg oder dem zweiten Umdruck-Transportweg zuführt. Bei dieser Ausführungsform wird die Betriebsart Simplexdruck mit einer Farbe realisiert, d.h. zugeführtes blattförmiges Material, z.B. Einzelblätter aus Papier werden vom ersten Druckwerk oder vom zweiten Druckwerk auf einer Seite bedruckt. Bei einer Weiterbildung führt die Weiche blattförmiges Material abwechselnd dem ersten Umdruck-Transportweg und dem zweiten Umdruck-Transportweg zu. Da jedes Druckwerk mit derselben Umdruckgeschwindigkeit das blattförmige Material bedruckt und zwei Druckwerke parallel angeordnet sind, verdoppelt sich insgesamt die Druckleistung im Gerät. Es können demnach Einzelblätter mit der doppelten Druckgeschwindigkeit zugeführt und wieder abgeführt werden.One embodiment of the invention provides that the input section a switch that contains sheet-like material either the first transfer printing route or the second Transfer printing transport route feeds. In this embodiment the simplex printing mode is implemented with one color, i.e. supplied sheet material, e.g. Cut sheets Paper is from the first printing unit or from the second printing unit printed on one side. With further training, the Soft sheet material alternating the first transfer printing route and the second transfer printing transport path. Because every The sheet-like printing unit with the same transfer printing speed Material printed and two printing units arranged in parallel are, the overall printing performance doubles Device. Single sheets with double Printing speed fed and removed again.

Ein anderes Ausführungsbeispiel sieht vor, daß der erste Umdruck-Transportweg und der zweite Umdruck-Transportweg durch einen Verbindungskanal verbunden sind, durch welchen blattförmiges Material in eine oder in beiden Transportrichtungen förderbar ist. Durch diese Maßnahmen kann bedrucktes Material vom ersten Druckwerk dem zweiten Druckwerk sowie vom zweiten Druckwerk dem ersten Druckwerk zugeführt werden, um es zu bedrucken. Durch den Verbindungskanal ist also eine Rückführung geschaffen, welche die beiden Druckwerke miteinander verbindet, wodurch vielfältige Druckprozesse ermöglicht werden.Another exemplary embodiment provides that the first transfer printing transport route and through the second transfer printing path a connecting channel are connected, through which leaf-shaped Material in one or both transport directions is eligible. These measures can cause printed material from the first printing unit to the second printing unit and from the second Printing unit to be fed to the first printing unit to it print. A return is therefore through the connecting channel created which the two printing units together connects, which enables diverse printing processes.

Eine weitere Ausführungsform sieht vor, daß das blattförmige Material beim Transport vom ersten Umdruck-Transportweg zum zweiten Umdruck-Transportweg gewendet wird. Auf diese Weise kann jedes Druckwerk die Vorderseite und auch die Rückseite eines Einzelblattes bedrucken. Wenn für die beiden Druckwerke Entwicklerstationen mit unterschiedlichen Farben verwendet werden, so können auf jeder Seite des Einzelblattes zwei Bildmuster mit zwei verschiedenen Farben gedruckt werden, d.h. es kann ein sogenannter Zweifarben-Duplexbetrieb, auch Duplex-Farbspot-Betrieb genannt, verwirklicht werden.Another embodiment provides that the leaf-shaped Material during transport from the first transfer printing path to second transfer printing transport path is turned. In this way can each printing unit the front and also the back printing on a single sheet. If for the two printing units Developer stations with different colors used so there can be two on each side of the single sheet Image patterns can be printed with two different colors, i.e. it can do a so-called two-color duplex operation, too Called duplex color spot operation.

Gemäß einem weiteren Aspekt der Erfindung wird ein Druckersystem angegeben, bei dem zwei gleichartige, vorher beschriebene Geräte durch eine Übergabevorrichtung verbunden sind, die das von vom ersten Gerät bedruckte blattförmige Material dem zweiten, gleichartigen Gerät zuführt. Wenn jedes dieser beiden Geräte verschiedenfarbige Druckwerke enthält, so können Einzelblätter auf beiden Seiten mit vier Farben bedruckt werden. Selbstverständlich sind andere Varianten denkbar, z.B. daß das eine Gerät zwei Farben auf einer Seite und das andere Gerät zwei Farben auf der anderen Seite druckt. Eine Vielzahl von weiteren Varianten sind denkbar und werden weiter unten noch erläutert.According to another aspect of the invention, a printer system specified, in which two similar, previously described Devices are connected by a transfer device, which is the sheet material printed by the first device to the second, similar device. If any of these contains two different colored printing units, so can Single sheets printed on both sides with four colors become. Of course, other variants are conceivable, e.g. that one device has two colors on one side and that other device prints two colors on the other side. A Numerous other variants are conceivable and will continue to be explained below.

Gemäß einem weiteren Aspekt der Erfindung wird ein Verfahren zum Bedrucken von blattförmigem Material gemäß dem Patentanspruch 25 angegeben.According to a further aspect of the invention, a method for printing sheet-like material according to the claim 25 specified.

Ausführungsbeispiele der Erfindung werden im folgenden anhand der Zeichnung erläutert. Darin zeigt:

Figur 1
schematisch den Aufbau eines Hochleistungsdruckers, bei dem die Erfindung verwirklicht ist,
Figur 2
schematisch die Betriebsart Simplexdruck mit dem unteren Druckwerk,
Figur 3
schematisch die Betriebsart Simplexdruck mit dem oberen Druckwerk,
Figur 4
die Betriebsart abwechselnder Simplexdruck,
Figur 5
die Betriebsart Duplexdruck,
Figur 6
die Betriebsart Zweifarben-Simplexdruck,
Figur 7
schematisch die Betriebsart Zweifarben-Duplexdruck, und
Figur 8
eine Anordnung mit zwei Hochleistungsdruckern, die durch eine Übergabevorrichtung miteinander verbunden sind.
Embodiments of the invention are explained below with reference to the drawing. It shows:
Figure 1
schematically the structure of a high-performance printer in which the invention is implemented,
Figure 2
schematically the operating mode simplex printing with the lower printing unit,
Figure 3
schematically the operating mode simplex printing with the upper printing unit,
Figure 4
the operating mode alternating simplex pressure,
Figure 5
the duplex printing mode,
Figure 6
the operating mode two-color simplex printing,
Figure 7
schematically the operating mode two-color duplex printing, and
Figure 8
an arrangement with two high-performance printers, which are interconnected by a transfer device.

In Figur 1 ist ein Hochleistungsdrucker 10 dargestellt, der zum schnellen Drucken von Einzelblättern aus Papier dient. Der Hochleistungsdrucker 10 enthält ein erstes, unteres Druckwerk D1 sowie ein zweites, oberes Druckwerk D2. Beide Druckwerke D1, D2 arbeiten nach dem bekannten elektrografischen Verfahren mit gleicher Umdruckgeschwindigkeit. Den Druckwerken D1, D2 sind Fixiereinrichtungen nachgeschaltet, die schematisch in der Figur 1 durch zwei Rollenpaare 12, 14 angedeutet sind. An den Hochleistungsdrucker 10 ist eine Papiereingabe 16 angeschlossen, die mehrere Vorratsbehälter 18 bis 24 mit Einzelblättern sowie einen externen Papiereingabekanal 26 enthält, über den von außen Einzelblätter zugeführt werden können. Über einen Transportkanal werden Einzelblätter einem Eingabeabschnitt 28 zugeführt. Ausgabeseitig ist an den Hochleistungsdrucker 10 eine Papierausgabe 30 angeschlossen, die mehrere Ausgabebehälter 32 bis 36 enthält. Ferner sind zwei Ausgabekanäle 38, 40 vorgesehen, über die Einzelblätter an weiterverarbeitende Stationen ausgegeben werden können. Der Hochleistungsdrucker 10 gibt die bedruckten Einzelblätter über den Ausgababschnitt 42 ab.A high-performance printer 10 is shown in FIG for fast printing of single sheets of paper. The high performance printer 10 includes a first, lower one Printing unit D1 and a second, upper printing unit D2. Both Printing units D1, D2 work according to the known electrographic Process with the same transfer printing speed. The Fixing devices are connected downstream of printing units D1, D2, schematically in Figure 1 by two pairs of rollers 12, 14th are indicated. There is a paper input to the high-performance printer 10 16 connected, the multiple storage container 18th up to 24 with single sheets and an external paper input channel 26 contains, via which single sheets are fed from the outside can be. Single sheets are transferred via a transport channel fed to an input section 28. On the output side is to High-performance printer 10 connected to a paper output 30, which contains a plurality of output containers 32 to 36. Furthermore are two output channels 38, 40 are provided, via the single sheets can be issued to processing stations. The high-performance printer 10 gives the printed single sheets via the output section 42.

Im Inneren des Hochleistungsdruckers 10 sind Transportwege für den Transport der Einzelblätter angeordnet, durch die verschiedene Betriebsarten des Hochleistungsdruckers realisiert werden. Den Druckwerken D1, D2 sind jeweils Umdruck-Transportwege 44, 46 zugeordnet, die jeweils durch Antriebe so eingestellt sind, daß die zugeführten Einzelblätter an den Druckwerken D1, D2 ihre Umdruckgeschwindigkeit haben. Beide Umdruck-Transportwege 44, 46 sind über einen Verbindungskanal 48 miteinander verbunden. Der Transportweg um das erste Druckwerk D1 ist zu einem Ring R1 durch einen Zuführkanal 50 ergänzt, über den auch Einzelblätter vom Eingabeabschnitt 28 dem zweiten Umdruck-Transportweg 46 zugeführt werden können. Der Transportweg für das zweite Druckwerk D2 wird auf ähnliche Weise zu einem Ring R2 durch einen Abführkanal 52 ergänzt, über den vom Druckwerk D1 bedruckte Einzelblätter dem Ausgabeabschnitt 42 zugeführt werden können.Transport routes are located inside the high-performance printer 10 arranged for the transport of the single sheets through which different operating modes of the high-performance printer become. The printing units D1, D2 are transfer printing transport routes 44, 46 assigned, each by drives are set so that the single sheets fed to the Printing units D1, D2 have their transfer printing speed. Both Transfer printing transport paths 44, 46 are via a connecting channel 48 connected to each other. The transport route around the first Printing unit D1 is to a ring R1 through a feed channel 50 added, about which also single sheets from the input section 28 can be fed to the second transfer printing transport path 46. The transport route for the second printing unit D2 is similar Way to a ring R2 through a discharge channel 52 added, about the single sheets printed by printing unit D1 can be fed to the output section 42.

Zwischen dem Eingabeabschnitt 28, dem ersten Umdruck-Transportweg 44 und dem Zuführkanal 50 ist eine erste Weiche W1 angeordnet, die es ermöglicht, daß Einzelblätter vom Eingabeabschnitt 28 wahlweise dem ersten Umdruck-Transportweg 44 oder dem Zuführkanal 50 zugeführt werden. Eine weitere Variante besteht darin, daß auf dem Zuführkanal 50 in Richtung der Weiche W1 transportierte Einzelblätter dem ersten Umdruck-Transportweg 44 zugeführt werden können.Between the input section 28, the first transfer printing transport path 44 and the feed channel 50 is a first switch W1 arranged, which enables cut sheets from the input section 28 optionally the first transfer printing transport path 44 or be fed to the feed channel 50. Another variant is that on the feed channel 50 in the direction the switch W1 transported single sheets on the first transfer printing path 44 can be supplied.

Weiterhin sind eine zweite Weiche W2 und eine dritte Weiche W3 an den Enden des Verbindungskanals 48 angeordnet und verbinden jeweils die angrenzenden Transportwege 44, 48, 52 bzw. 46, 48, 50. Eine vierte Weiche W4 befindet sich in der Nähe des Ausgabeabschnitts 42 und verbindet die angrenzenden Transportwege. Die Papierausgabe 30 enthält eine fünfte Weiche W5, die als Wendevorrichtung arbeitet. Ferner ist noch auf eine Aussteuereinrichtung 54 hinzuweisen, der über eine Weiche W6 Ausschuß-Einzelblätter zugeführt werden.There are also a second switch W2 and a third switch W3 arranged at the ends of the connecting channel 48 and connect the adjacent transport routes 44, 48, 52 or 46, 48, 50. A fourth turnout W4 is nearby of the output section 42 and connects the adjacent ones Transport routes. The paper output 30 contains a fifth switch W5, which works as a turning device. Furthermore is still to point to a control device 54, which via a Soft W6 reject single sheets are fed.

Durch die in Figur 1 beschriebene Anordnung können verschiedene Betriebsarten des Hochleistungsdruckers 10 verwirklicht werden. In den nachfolgenden Figuren 2 bis 7 sind die verschiedenen Betriebsarten schematisch dargestellt. Die jeweilige Förderung der Einzelblätter wird anhand von Pfeilen verdeutlicht. Due to the arrangement described in Figure 1, various Operating modes of the high-performance printer 10 realized become. In the following Figures 2 to 7 are the different Operating modes shown schematically. The respective The promotion of single sheets is illustrated by arrows.

In Figur 2 ist schematisch der Simplexdruck mit nur einem Druckwerk dargestellt. Bei diesem Simplexdruck wird nur eine Seite eines Einzelblattes bedruckt. Das Einzelblatt gelangt über den Eingabeabschnitt 28 und die entsprechend geschaltete Weiche W1 entlang dem Pfeil Pl zum ersten Umdrucktransportweg 44 und wird an dem Druckwerk D1 bedruckt. Anschließend wird das Einzelblatt entlang dem Abführkanal 52 (Pfeil P2) über den Ausgabeabschnitt 42 in die Papierausgabe 30 ausgegeben (Pfeil P3).FIG. 2 shows schematically the simplex printing with only one Printing unit shown. With this simplex print only one Printed on one side of a single sheet. The single sheet arrives via the input section 28 and the corresponding switched Turnout W1 along arrow Pl to the first transfer printing path 44 and is printed on the printing unit D1. Then will the single sheet along the discharge channel 52 (arrow P2) the output section 42 is output to the paper output 30 (Arrow P3).

Figur 3 zeigt den Simplexdruck mit dem oberen, zweiten Druckwerk D2. Der Transport des Einzelblattes erfolgt über den Zuführkanal 50 (Pfeil P4), den zweiten Umdruck-Transportweg (Pfeil P5) zur Papierausgabe 30 (Pfeil P6).Figure 3 shows the simplex printing with the upper, second printing unit D2. The single sheet is transported via the Feed channel 50 (arrow P4), the second transfer printing transport path (Arrow P5) to paper output 30 (arrow P6).

Beim abwechselnden Simplexdruck mit erhöhter Druckleistung werden über den Eingabeabschnitt 28 Einzelblätter mit mindestens der doppelten Umdruckgeschwindigkeit der Druckwerke D1, D2 zugeführt. Figur 4 zeigt schematisch den Transport der Einzelblätter. Die Weiche W1 führt abwechselnd dem Zuführkanal 50 bzw. dem ersten Umdruck-Transportweg 44 Einzelblätter zu (Pfeile P7, P8). Die Einzelblätter werden auf ihrem Transport bis zu den Druckwerken D1, D2 auf Umdruckgeschwindigkeit abgebremst, dort jeweils auf der Vorderseite bedruckt und anschließend zur Weiche W4 weiter gefördert. Bei dieser Weiterförderung gemäß den Pfeilen P9, P10 werden die Einzelblätter auf mindestens die doppelte Umdruckgeschwindigkeit beschleunigt, so daß sie am gemeinsamen Ausgabeabschnitt über die Weiche W4 mit Abstand voneinander ausgegeben und in der Papierausgabe 30 nacheinander mit mindestens der doppelten Umdruckgeschwindigkeit gemäß dem Pfeil P11 weitertransportiert werden können.With alternating simplex printing with increased printing performance 28 single sheets with at least the double transfer speed of the printing units D1, D2 fed. Figure 4 shows schematically the transport of the Single sheets. The switch W1 leads alternately to the feed channel 50 or the first transfer printing path 44 single sheets to (arrows P7, P8). The single sheets are on their transport up to the printing units D1, D2 on transfer printing speed braked, there each printed on the front and then further promoted to switch W4. With this further funding according to the arrows P9, P10 the single sheets accelerated to at least twice the transfer speed, so that they over at the common output section the switch W4 issued at a distance from each other and in the Paper output 30 in sequence with at least double Transfer printing speed transported according to arrow P11 can be.

Bei der sogenannten Betriebsart "abwechselnder Simplexdruck" ist also erfindungsgemäß vorgesehen, daß in.der Papiereingabe 16 die Einzelblätter zum Eingabeabschnitt 28 mit mindestens der doppelten Umdruckgeschwindigkeit den Druckwerken D1, D2 zugeführt werden. Auch in der Papierausgabe 30 werden die Einzelblätter ebenfalls mit mindestens der doppelten Geschwindigkeit weitergefördert und abgelegt. Durch diese Maßnahmen treffen die Einzelblätter am gemeinsamen Eingabeabschnitt 28 und am gemeinsamen Ausgabeabschnitt 42 ein, ohne daß eine Kollision von Einzelblättern und demzufolge ein Papierstau auftreten kann. Vorzugsweise sind die Transportwege für die dem ersten Druckwerk Dl zugeführten Einzelblätter und die dem zweiten Druckwerk D2 zugeführten Einzelblätter symmetrisch ausgelegt oder zumindest gleich lang, so daß auf beiden Transportwegen die Einzelblätter mit dem gleichen Geschwindigkeitsprofil abgebremst und beschleunigt werden können. Dadurch ist es möglich, die zum Transport erforderlichen Antriebe und Vorrichtungen gleichartig aufzubauen. Weiterhin ist es möglich, gleichartige Steuerungen zu verwenden.In the so-called operating mode "alternating simplex printing" is therefore provided according to the invention that in. the paper input 16 the single sheets for the input section 28 with at least twice the transfer speed of the printing units D1, D2 be fed. In the paper edition 30, too Single sheets also at least twice the speed promoted and filed. Through these measures meet the single sheets at the common input section 28 and at the common output section 42 without that a collision of single sheets and consequently a paper jam can occur. The transport routes are preferred for the single sheets and the first printing unit Dl the single sheets fed to the second printing unit D2 are symmetrical designed or at least the same length, so that on both Transport routes the single sheets with the same speed profile can be slowed down and accelerated. This makes it possible to have the necessary for transportation Build drives and devices in the same way. Farther it is possible to use similar controls.

Figur 5 zeigt schematisch den Duplex-Druckbetrieb, bei dem die Einzelblätter beidseitig bedruckt werden. Die dem Eingabeabschnitt 28 zugeführten Einzelblätter werden durch die erste Weiche W1 dem ersten Umdruck-Transportweg 44 zugeführt (Pfeil P13). Nach dem Bedrucken durch das Druckwerk D1 wird das jeweilige Einzelblatt eine Wendestrecke gemäß dem Pfeil P14 über die Weiche W2 hinausgefördert. Diese Wendestrecke ist ein Teil des Abführkanals 52. Anschließend wird die Förderrichtung gemäß Pfeil P15 umgekehrt, und die Weiche W2 leitet dann das Einzelblatt gemäß dem Pfeil P16 in den Verbindungskanal 48. Das Einzelblatt wird dann von der Weiche W3 in Richtung des Pfeils P17 zum zweiten Umdruck-Transportweg 46 umgelenkt. Dem Druckwerk D2 wird also die noch nicht bedruckte Rückseite des Einzelblattes zum Bedrucken zugeführt. Anschließend werden die Einzelblätter gemäß dem Pfeil P18 der Weiche W4 zugeführt und in die Papierausgabe 30 entlang dem Pfeil P19 transportiert. Da das Einzelblatt in diesem Zustand mit seiner Rückseite nach oben transportiert wird, ist es vor dem Ablegen in den Fächern 32 bis 36 noch zu wenden. Hierzu dient die Weiche W5. Das Einzelblatt wird zunächst durch die Weiche W5 in Richtung des Pfeils P20 für eine vorbestimmte Wendestrecke geführt. Dann wird die Transportrichtung gemäß dem Pfeil P21 umgekehrt und die Weiche W5 fördert das Einzelblatt in Richtung des Pfeils P22, woraufhin es in den Ablagefächern 32 bis 36 seitenrichtig abgelegt wird.Figure 5 shows schematically the duplex printing operation in which the single sheets are printed on both sides. The input section 28 single sheets are fed by the first switch W1 fed to the first transfer printing transport path 44 (Arrow P13). After printing by the printing unit D1 the respective single sheet a turning distance according to the arrow P14 conveyed beyond the turnout W2. This turning range is part of the discharge channel 52. Then the conveying direction reversed according to arrow P15, and the switch W2 conducts then the single sheet according to arrow P16 in the connection channel 48. The single sheet is then in the turnout W3 Direction of arrow P17 to the second transfer printing path 46 redirected. The printing unit D2 is therefore not yet printed Back of the single sheet fed for printing. Then cut the single sheets according to arrow P18 Soft W4 fed and into the paper output 30 along the Arrow P19 transported. Because the cut sheet in this condition is transported with its back up, it is in front filing in compartments 32 to 36. For this serves the turnout W5. The single sheet is first of all by the Switch W5 in the direction of arrow P20 for a predetermined one Turning range led. Then the transport direction is according to the arrow P21 reversed and the switch W5 promotes the single sheet in the direction of arrow P22, whereupon it is in the storage compartments 32 to 36 is stored correctly.

Wie zu erkennen ist, arbeitet die Weiche W2 als Wendevorrichtung, um dem Druckwerk D2 die Rückseite des Einzelblattes zuzuführen. Alternativ kann zum Wenden auch die Weiche W3 eingesetzt werden. Das das Druckwerk D1 verlassende Einzelblatt wird dann über die Weiche W2, den Verbindungskanal 48 der Weiche W3 und dann für eine kurze Wendestrecke entlang dem Zuführkanal 50 in Richtung der Weiche W1 geführt. Anschließend wird die Transportrichtung umgekehrt und die Weiche W3 leitet das Einzelblatt in Richtung des Druckwerks D2 mit seiner Rückseite nach oben.As can be seen, the switch W2 works as a turning device, around the printing unit D2 the back of the single sheet feed. Alternatively, the turnout W3 can also be used be used. The single sheet leaving the printing unit D1 is then on the switch W2, the connecting channel 48th the turnout W3 and then for a short turning distance the feed channel 50 in the direction of the switch W1. Subsequently the transport direction is reversed and the switch W3 directs the single sheet in the direction of the printing unit D2 with its back up.

Figur 6 zeigt schematisch eine weitere Betriebsart, den Zweifarben-Simplexdruck, bei dem die Vorderseite eines Einzelblattes mit zwei Bildmustern verschiedener Farbe bedruckt wird. Die beiden Druckwerke D1, D2 drucken Bildmuster verschiedener Farbe. Bei der genannten Betriebsart Zweifarben-Simplexdruck wird das Einzelblatt über die Weiche W1 dem Druckwerk D1 zugeführt (Pfeil P25). Anschließend wird das Einzelblatt über die Weiche W2 dem Verbindungskanal 48 ohne Wenden und dann über die Weiche W3 dem Druckwerk D2 zugeführt (Pfeile P26, P27). Das Druckwerk D2 bedruckt die Vorderseite mit einer von der Farbe des Druckwerks D1 verschiedenen Farbe. Anschließend wird das Einzelblatt über die Weiche W4 an die Papierausgabe 30 ausgegeben (Pfeil P28).FIG. 6 schematically shows a further operating mode, the two-color simplex printing, where the front of a single sheet printed with two image samples of different colors becomes. The two printing units D1, D2 print different image patterns Colour. In the above-mentioned operating mode two-color simplex printing the single sheet is turned over to the switch W1 Printing unit D1 fed (arrow P25). Then that will Single sheet over the switch W2 the connecting channel 48 without Turn and then fed to the printing unit D2 via the switch W3 (Arrows P26, P27). The printing unit D2 prints the front with a different color from the printing unit D1 Colour. Then the single sheet is on the switch W4 output to paper output 30 (arrow P28).

Figur 7 zeigt schematisch den Transportweg eines Einzelblattes bei der Betriebsart Zweifarben-Duplexdruck, bei der die Vorderseite und die Rückseite eines Einzelblattes mit Bildmustern verschiedener Farbe bedruckt werden. Voraussetzung hierfür ist, daß die Druckwerke D1 und D2 verschiedenfarbige Druckbilder drucken. Zum zweifarbigen Bedrucken der Vorderseite wird wie bei der Betriebsart Zweifarben-Simplexdruck gemäß Figur 6 vorgegangen. Die Pfeile P25, P26, P27 und P28 veranschaulichen den Transportweg. Anschließend wird das Einzelblatt erneut dem Druckwerk D1 zugeführt. Die Pfeile P29 bis P36 veranschaulichen den Transportweg des Einzelblattes zum Bedrucken der Rückseite. Damit diese Rückseite dem Druckwerk D1 zugeführt wird, muß auf dem Transportweg zwischen dem Druckwerk D2 und dem Druckwerk D1 das Einzelblatt gewendet werden. Dieses Wenden kann z.B. an der Weiche W4, der Weiche W2 oder der Weiche W3 erfolgen. Bei einem bevorzugten Ausführungsbeispiel der Erfindung erfolgt das Wenden mithilfe der Weiche W4, d.h. das Einzelblatt wird zunächst für eine kurze Wendestrecke in Richtung der Weiche W5 transportiert, dann die Transportrichtung umgekehrt und das Einzelblatt in Richtung der Weiche W2 weitergefördert. Nach dem Transport in die Papierausgabe 30 gemäß dem Pfeil P36 erfolgt ein weiteres Wenden durch die Weiche W5 und anschließend die seitenrichtige Ablage des doppelseitig mit jeweils zwei Farbbildern bedruckten Einzelblattes.Figure 7 shows schematically the transport path of a single sheet in the two-color duplex printing mode, in which the Front and back of a single sheet with picture patterns different colors can be printed. requirement for this is that the printing units D1 and D2 have different colors Print images. For two-color printing on the front is the same as in the two-color simplex printing mode proceeded according to Figure 6. Arrows P25, P26, P27 and P28 illustrate the transport route. Then the cut sheet again fed to the printing unit D1. The arrows P29 up to P36 illustrate the transport path of the single sheet for printing on the back. So that this back of the printing unit D1 is fed must on the transport route between the Printing unit D2 and printing unit D1 turned the single sheet become. This turning can e.g. on the turnout W4, the turnout W2 or the switch W3. In a preferred embodiment the invention, the turning takes place with the help of Turnout W4, i.e. the single sheet is initially for a short Then transported turning path towards the turnout W5 the transport direction reversed and the single sheet in the direction the switch W2 further promoted. After transportation to the Paper output 30 according to arrow P36 is another Turn through the turnout W5 and then the right side Storage of the double-sided printed with two color images each Single sheet.

Ein alternativer Transport des Einzelblattes durch den Hochleistungsdrucker 10 zur Realisierung der Betriebsart Zweifarben-Duplexdruck kann in der folgenden Weise erfolgen. Zunächst wird das Einzelblatt vom Eingabeabschnitt 28 über die Weiche W1 dem Druckwerk D1 zugeführt, seine Vorderseite bedruckt und anschließend über die Weichen W2 und W3 zum Wenden kurz in Richtung der Weiche W1 geleitet. Nach dem Passieren der Weiche W3 wird die Transportrichtung in Richtung Druckwerk D2 geändert und das Einzelblatt auf dem Umdruck-Transportweg 46 gefördert. Die Weiche W3 dient also als Wendestation. Am Druckwerk D2 wird demnach die Rückseite des Einzelblattes bedruckt. Danach wird das Einzelblatt über die Weichen W4, W2, W3 und W1 erneut dem ersten Druckwerk D1 zugeführt, um nunmehr die Rückseite zu bedrucken. Das Einzelblatt muß hierzu gewendet werden. Dies erfolgt an Weiche W4, wobei es kurz in Richtung Weiche W5 gefördert, die Transportrichtung umgekehrt und in Richtung Weiche W2 im gewendeten Zustand transportiert wird. Nach dem Bedrucken der Rückseite des Einzelblattes im Druckwerk D1 wird das Einzelblatt über die Weichen W2 und W3 dem Druckwerk D2 zugeführt, wobei es gewendet wird. Nunmehr wird die Vorderseite vom Druckwerk D2 bedruckt. Anschließend wird das Einzelblatt über die Weiche W4 zu den Ablagefächern 32 bis 36 geführt. Da es nunmehr lagerichtig, d.h. mit der Oberseite nach oben in die Ablage 30 gelangt, muß es nicht erneut durch die Weiche W5 gewendet werden.An alternative transport of the single sheet through the High-performance printer 10 to implement the operating mode Two-color duplex printing can be done in the following manner. First, the cut sheet is fed from the input section 28 the switch W1 fed to the printing unit D1, its front printed and then over turnouts W2 and W3 headed briefly towards the turnout W1. After passing the switch W3 becomes the transport direction in the direction Printing unit D2 changed and the single sheet on the transfer printing transport route 46 funded. The switch W3 thus serves as a turning station. At the printing unit D2, the back of the Single sheet printed. Then the single sheet is over the Switches W4, W2, W3 and W1 again fed to the first printing unit D1, to now print on the back. The single sheet must be used for this. This is done on switch W4, being conveyed briefly towards switch W5, the direction of transport reversed and in the direction of turnout W2 Condition is transported. After printing on the back of the single sheet in the printing unit D1 is the single sheet the switches W2 and W3 fed to the printing unit D2, it is turned. Now the front side of the printing unit D2 printed. Then the single sheet over the switch W4 led to storage compartments 32 to 36. Now that it's in the correct position, i.e. upside down in the tray 30 arrives, it does not have to be turned through the turnout W5 again become.

Figur 8 zeigt die Anordnung zweier Hochleistungsdrucker 10 und 10' zu einem Drucksystem 55. Die beiden Hochleistungsdrucker 10 und 10' sind gleichartig aufgebaut, die einzelnen Komponenten müssen daher nicht nochmals erläutert werden. Zwischen dem Ausgabekanal 38 des ersten Hochleistungsdruckers 10 und dem externen Papiereingabekanal 26 des zweiten Hochleistungsdruckers 10' ist eine Übergabevorrichtung 56 angeordnet, welche Einzelblätter vom Hochleistungsdrucker 10 zum Hochleistungsdrucker 10' fördert. Jeder Hochleistungsdrucker 10, 10' kann die bereits beschriebenen Betriebsarten Simplexdruck, alternativer Simplexdruck, Zweifarben-Simplexdruck, Einfarben-Duplexdruck und Zweifarben-Duplexdruck realisieren. Durch Kombination der verschiedenen Betriebsarten, bei der eine erste Betriebsart in Hochleistungsdrucker 10 und eine übereinstimmende oder andere Betriebsart im Hochleistungsdrucker 10' eingestellt wird, können neue Varianten von Betriebsarten realisiert werden. Beispielsweise können beide Hochleistungsdrucker im Zweifarben-Simplexbetrieb arbeiten, wobei der erste Drucker die Vorderseite mit zwei verschiedenfarbigen Bildmustern bedruckt und der Hochleistungsdrucker 10' die Rückseite mit zwei verschiedenfarbigen Bildmustern bedruckt. Werden für insgesamt vier verschiedene Druckwerke jeweils unterschiedliche Farben gewählt, so kann durch das Drucksystem 55 ein Vierfarben-Duplexbetrieb realisiert werden, d.h. jeweils die Vorderseite und die Rückseite können mit vier verschiedenfarbigen Bildmustern bedruckt werden. FIG. 8 shows the arrangement of two high-performance printers 10 and 10 'to a printing system 55. The two high-performance printers 10 and 10 'are constructed in the same way, the individual Components therefore do not have to be explained again. Between the output channel 38 of the first high performance printer 10 and the external paper input channel 26 of the second High performance printer 10 'is a transfer device 56 arranged, which single sheets from the high-performance printer 10th to the high-performance printer 10 '. Any high performance printer 10, 10 'can be the operating modes already described Simplex printing, alternative simplex printing, two-color simplex printing, Realize single-color duplex printing and two-color duplex printing. By combining the different operating modes, in which a first operating mode in high-performance printer 10 and a matching or different operating mode in the high-performance printer 10 'is set, new variants of Operating modes can be realized. For example, both High-performance printers work in two-color simplex mode, the first printer with two different colors on the front Printed image patterns and the high-performance printer 10 'the back with two different colored image patterns printed. Are used for a total of four different printing units different colors selected, so can by Printing system 55 a four-color duplex operation can be realized i.e. the front and the back can each can be printed with four different colored image patterns.

Das Drucksystem 55 kann noch erweitert werden, indem mindestens ein weiterer Hochleistungsdrucker nach Art des Hochleistungsdruckers 10 an den Hochleistungsdrucker 10' angeschlossen wird. Auf diese Weise kann bei Ausnutzung aller technischen Möglichkeiten der Hochleistungsdrucker ein n-farbiger Duplexdruck ermöglicht werden, bei dem auf Vorderseite und Rückseite eines Einzelblattes ein n Bildmuster mit n verschiedenen Farben gedruckt werden, wobei n eine beliebige ganze Zahl ist.The printing system 55 can be expanded by at least another high-performance printer of the type of high-performance printer 10 connected to the high-performance printer 10 ' becomes. In this way, all technical Possibilities of high-performance printers an n-color Duplex printing is possible, on the front and Back of a single sheet an image pattern with n different Colors are printed, where n is any is an integer.

Claims (24)

  1. Appliance, in particular printer or copier, having a first electrographic printing unit (D1), which prints an image pattern onto a sheet material in a first transfer-printing transport path (44),
    having an input section (28), via which the sheet material can be fed individually one after another, and having an output section (42), via which the printed sheet material is output individually one after another,
    a substantially identical second printing unit (D2) being provided in a second transfer-printing transport path (46), to which printing unit sheet material can be fed via the common input section (28) and which prints an image pattern onto sheet material,
    the sheet material printed by the second printing unit (D2) being output via the same output section (42),
    the two transfer-printing transport paths (44, 46) each being connected, via connecting paths (48, 50, 52), to two rings (R1, R2),
    the ring (R1) of the first transfer-printing transport path (44) comprising a feed channel (50), via which sheet material can be fed from the input section (28) to the second transfer-printing transport path (46),
    the ring (R2) of the second transfer-printing transport path (46) comprising a discharge channel (52), via which sheet material printed by the first printing unit (D1) can be fed to the output section (42),
    the two rings (R1, R2) each being constructed in such a way that
    a sheet material printed by a printing unit (D1, D2) in a first printing operation can be fed again to the same printing unit (D1, D2) in such a way that it passes through this printing unit (D1, D2) in the same direction as in the first printing operation,
    a first diverter (W2) being provided on the first ring (R1), via which diverter the sheet material can be turned in the first ring (R1), and a second diverter (W4) being provided on the second ring (R2), by means of which diverter the sheet material can be turned in the second ring (R2).
  2. Appliance according to Claim 1, characterized in that
    the two rings (R1, R2) are connected to each other via two diverters (W2, W3) and
    the diverters (W2, W3) each have three paths, which produces a multiplicity of different transport paths for the sheet material.
  3. Appliance according to Claim 2, characterized in that the input section (28) contains a diverter (W1) which feeds sheet material either to the first transfer-printing transport path (44) or to the second transfer-printing transport path (46).
  4. Appliance according to Claim 3, characterized in that the diverter (W1) in the input section (28) feeds sheet material alternately to the first transfer-printing transport path (44) and to the second transfer-printing transport path (46).
  5. Appliance according to one of the preceding claims, characterized in that the first transfer-printing transport path (44) and the second transfer-printing transport path (46) are connected by a connecting channel (48), through which sheet material can be conveyed in one or both transport directions.
  6. Appliance according to Claim 5, characterized in that when sheet material is being transported from the first transfer-printing transport path (44) to the second transfer-printing transport path (46) and vice versa, the sheet material is turned by a turner device (W2, W3, W4).
  7. Appliance according to Claim 6, characterized in that at least one turner device (W2, W3) is arranged at at least one end of the connecting channel (48), in particular a turner device (W2, W3) being arranged at each end of the connecting channel (48).
  8. Appliance according to either of Claims 6 and 7, characterized in that the turner device contains a diverter (W2, W3, W4), in that the sheet material, to be turned, is first transported past the diverter (W2, W3, W4) on a first transport path in one transport direction into a turner section (52, 50), in that the transport direction is then reversed, and in that the diverter (W2, W3, W4) conveys the sheet material to a second transport path in the other transport direction.
  9. Appliance according to one of Claims 1 to 5, characterized in that the sheet material is first fed to the first transfer-printing transport path (44), and, without being turned, is fed via the connecting channel (48) to the second transfer-printing transport path (46) and then output.
  10. Appliance according to one of the preceding claims, characterized in that a two-sided printing operating mode is provided, in which the sheet material is first fed to the first transfer-printing transport path (44) and then to the second transfer-printing transport path (46), in that the sheet material printed by the second printing unit (D2) is again fed to the first transfer-printing transport path (44), being turned, and in that the sheet material is then fed to the second transfer-printing transport path (46) without being turned and then output.
  11. Appliance according to Claim 5, characterized in that the first transfer-printing transport path (44), the connecting channel (48) and the feed channel (50) form a self-contained transport path, the feed channel (50) being able to transport sheet material in both directions and being able to feed sheet material to the second transfer-printing transport path (46).
  12. Appliance according to Claim 5, characterized in that the second transfer-printing transport path (46), the connecting channel (48) and the discharge channel (52) for sheet material form a self-contained transport path, the discharge channel (52) being able to convey sheet material in both directions and connecting the first transfer-printing transport path (44) to the output section (42).
  13. Appliance according to one of the preceding claims, characterized in that the first printing unit (Dl) prints image patterns with a first colour, and in that the second printing unit (D2) prints image patterns with a second colour that is different from the first colour.
  14. Appliance according to one of the preceding claims, characterized in that downstream of the output section (42), in the conveying direction of the sheet material, there is arranged a turner device (W5) which turns the sheet material.
  15. Appliance according to one of the preceding claims, characterized in that upstream of the input section (28), as viewed in the conveying direction, there is arranged a paper input system (16), which provides sheet material in various storage containers (18, 20, 22, 24).
  16. Appliance according to one of the preceding claims, characterized in that downstream of the output section (42), in the conveying direction, there is arranged a paper output system (30), which contains a number of storage containers (32, 34, 36) in which the sheet material output is deposited.
  17. Appliance according to Claims 3 and 5, characterized in that at the connecting point between the first transfer-printing transport path (44) and the connecting channel (48) and discharge channel (52) there is arranged a second diverter (W2), in that at the connecting point between the connecting channel (48), second transfer-printing transport path (46) and feed channel (50) there is arranged a third diverter (W3), and in that at the connecting point between the second transfer-printing transport path (46) and the discharge channel (52) there is arranged a fourth diverter (W4).
  18. Appliance according to Claim 17, characterized in that in the two-colour duplex printing operating mode with two colours per side, the sheet material is fed via the input section (28) and the first diverter (W1) to the first printing unit (D1) and printed there with the first colour, the sheet material is transported via the second diverter (W2) and the third diverter (W3) to the second printing unit (D2) and printed there with the second colour,
    in order to print the second side, the sheet material being transported to the fourth diverter (W4), after passing the fourth diverter (W4), the sheet material being transported into a turner section, the transport direction being reversed and changed into the direction of the second diverter (W2), the sheet material being fed via the third diverter (W3) and the first diverter (W1) to the first printing unit (D1) and printed with the first colour,
    the sheet material being fed via the second diverter (W2) and the third diverter (W3) to the second printing unit (W2) and being printed with the second colour, and the sheet material being output via the fourth diverter (W4).
  19. Appliance according to Claim 17, characterized in that in the two-colour duplex printing operating mode with two colours per side, the sheet material is fed via the input section (28) and the first diverter (W1) to the first printing unit (D1) with the front side and printed there with a first colour,
    the sheet material is transported via the second diverter (W2) and the third diverter (W3), being turned, to the second printing unit and the rear side being printed there with a second colour,
    the sheet material being fed via the fourth diverter (W4), the second diverter (W2), the third diverter (W3) and the first diverter (W1) to the first printing unit (D1) with its rear side and printed with the first colour,
    the sheet material is fed via the second diverter (W2) and the third diverter (W3) to the second printing unit (D2), being turned, and printed with the second colour, and
    the sheet material is output via the fourth diverter (W4).
  20. Appliance according to one of the preceding claims, characterized in that a high-speed operating mode is provided, in which the sheet material is fed to the input section (28) at a speed equal to or greater than twice the transfer-printing speed of the printing units (D1, D2), and in that, before reaching the respective printing unit (D1, D2), the sheet material is braked to transfer-printing speed.
  21. Appliance according to Claim 20, characterized in that, in the high-speed operating mode, the sheet material, during its transport from the respective printing unit (D1, D2) to the output section (42), is accelerated to a speed which is equal to or greater than twice the speed of the transfer-printing speed of the printing units (D1, D2).
  22. Printer system having two identical appliances according to one of the preceding claims, characterized in that the output section (38) of the first appliance (10) is connected to a transfer device (56) which is connected to the input section (26) of the second appliance (10').
  23. Printer system according to Claim 22, characterized in that both appliances contain printing units (D1, D2 and D1, D2) which print variously coloured image patterns.
  24. Printer system according to either of Claims 22 and 23, characterized in that at least one further similar appliance is connected to the second appliance (10').
EP97945775A 1996-10-22 1997-10-22 Printer with two printing units Expired - Lifetime EP0934554B1 (en)

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DE19643654 1996-10-22
DE19643654 1996-10-22
PCT/DE1997/002451 WO1998018052A1 (en) 1996-10-22 1997-10-22 Printer with two printing units

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EP (2) EP0977095B1 (en)
JP (1) JP4146901B2 (en)
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CA2269596A1 (en) 1998-04-30
US6317581B1 (en) 2001-11-13
US6212357B1 (en) 2001-04-03
WO1998018052A1 (en) 1998-04-30
DE59712929D1 (en) 2008-04-30
EP0977095B1 (en) 2008-03-19
EP0977095A3 (en) 2000-10-04
EP0977095A2 (en) 2000-02-02
DE59704090D1 (en) 2001-08-23
EP0934554A1 (en) 1999-08-11
CA2269596C (en) 2006-04-11
JP2001502813A (en) 2001-02-27
JP4146901B2 (en) 2008-09-10
DE19781180D2 (en) 1999-08-05

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