EP0303053B2 - Sheet-transferring device - Google Patents

Sheet-transferring device Download PDF

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Publication number
EP0303053B2
EP0303053B2 EP88110921A EP88110921A EP0303053B2 EP 0303053 B2 EP0303053 B2 EP 0303053B2 EP 88110921 A EP88110921 A EP 88110921A EP 88110921 A EP88110921 A EP 88110921A EP 0303053 B2 EP0303053 B2 EP 0303053B2
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EP
European Patent Office
Prior art keywords
sheet
feed
feed table
impression cylinder
printing
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
EP88110921A
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German (de)
French (fr)
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EP0303053B1 (en
EP0303053A2 (en
EP0303053A3 (en
Inventor
Hermann Fischer
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0303053A2 publication Critical patent/EP0303053A2/en
Publication of EP0303053A3 publication Critical patent/EP0303053A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/16—Inclined tape, roller, or like article-forwarding side registers
    • B65H9/163—Tape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers

Definitions

  • the invention relates to a device for transferring sheets to at least one plate cylinder and one impression cylinder Printing unit of a sheet-fed rotary printing press.
  • a device for transferring sheets to the impression cylinder Sheet-fed rotary printing machine shows the FR-A-2 287 997. After that the printed sheet from a feed table into the gripper one initially stationary pre-gripper drum promoted. Then the Pre-gripper drum with the sheet at printing speed accelerates and transfers it to a printer at print speed feed drum rotating also at printing speed. Of you will bow at the same this peripheral speed hand over printing cylinder.
  • This transfer device is limited in terms of the speed of the bow and thus sets the limit for the printing performance of the sheet-fed rotary printing press. The high speeds to which the sheets are brought must cause strong accelerations, the impermissible Cause register errors in the sheet transfer.
  • US-A-2 687 886 shows a sheet-fed rotary printing press in which the arch is initially to the side using oblique bands aligned and then to the system on a conveyor roller brought.
  • the latter works constantly with a gravity resting load roller together and accelerates the bow frictional to print speed and shoots him in the Gripper of a printing cylinder or a roller that also with circulate at this speed.
  • a gravity resting load roller together and accelerates the bow frictional to print speed and shoots him in the Gripper of a printing cylinder or a roller that also with circulate at this speed.
  • Here is one too reliable sheet transfer at higher speeds no longer given.
  • From DE-A-3 305 219 and DE-B-1 123 678 is a gradual acceleration of arcs from a feed table to a feed drum or known a printing cylinder.
  • the adjustable arrangement is known from DE-A-2 452 051 the inclination of conveyor belts to the direction of transport known on a jetty.
  • the invention has for its object a device of this To create genus with a simple structure with a few moving sheet conveying elements, the printing unit per unit of time a large number of sheets regardless of their strength or ripple can pass in register, that is Operation of the printing press at very high speeds enables.
  • the printing unit shown in Fig. 1, generally designated 1 comprises a plate cylinder 2, a blanket cylinder 3 and a printing cylinder 4.
  • the printing cylinder 4 has double Diameter of the cylinders 2, 3 and carries two gripper systems 51, 52. It is therefore an offset printing unit.
  • invention is not for application to Offset printing units limited, it can rather with everyone another type of printing unit, i.e. high-pressure or gravure printing units Find application.
  • the printing press further comprises a feed table 5, which the Sheet individually in a known, not shown Be fed in the direction of arrow a.
  • a feed table 5 which the Sheet individually in a known, not shown Be fed in the direction of arrow a.
  • several conveyor belts 6, 7, 8, 9 are provided, each over two deflection rollers 10, 11 and tension rollers 12, 13 run, At least one of the deflection rollers 10, 11 is driven, specifically such that the upper run of the conveyor belts in the direction of Arrow b is running.
  • the conveyor belts 6 to 9 thus run underneath an acute angle to the feeding and conveying direction of the sheets, which is indicated by the arrow a.
  • Deflection rollers 10, 11 with the tensioning rollers 12, 13 on a carrier 14 attached which is rotatably mounted about an axis 15 to the acute angle between the conveying direction of the bow, arrow a, and the transport direction of the conveyor belts 6 to 9, arrow b, to be able to adjust.
  • a side mark 16, 17 fixed on both sides.
  • the conveyor belts 6 to 9 each Bow with a transverse to the conveying direction a Movement component against the side mark 16 and cause this results in a side orientation of the sheet during its Transport. Due to the rotatable arrangement of the carrier 14 furthermore the possibility to turn the sheet against the side mark 17 to guide and align there laterally.
  • One across Movement component directed in the conveying direction can also be the bow be granted in addition to in the conveying direction revolving conveyor belts or conveyor rollers blowing obliquely to it Air nozzles or an additional one running diagonally or transversely to it Conveyor belt is provided.
  • a feed roller 18 arranged over the feed table extends over the entire width of the feed table 5.
  • the feed roller 18 is wound a coil spring, one end of which is connected to a fixed part of the feed table 5, while the other end is attached to the conveyor roller 18.
  • the Coil spring tends to move the feed roller 18 in the opposite direction arrow c to rotate.
  • At both ends of the conveyor roller 18 is each a disc 21 is attached to which one end of a rope 22nd is connected and on which part of the rope is wound can be.
  • the other end of the rope 22 is on a lever 23 attached, which is pivotable about an axis 24.
  • Each lever 23 carries a roller 25, which by means of a fixed board 26th supported, with the other end engaging the lever 23 Compression spring 27 is held in contact with a control disk 28.
  • the two control disks 28 are seated on a synchronous with the Machine speed driven shaft 29. Instead of this drive another can alternately accelerate the conveyor roller and decelerating drive are used.
  • a pressure roller 32 is freely rotatable.
  • the axis 30 is in turn controlled synchronously with the machine speed, that the pressure rollers 32 temporarily against the conveyor roller 18 pressed and temporarily lifted from this.
  • Behind the Conveyor roller 18 is pivotable on the feed table in a known manner a pre-alignment token 33 stored, made up of several arranged across the width of the feed table Attacks exists.
  • the diameter of the transfer drum 34 is smaller than the diameter of the plate cylinder 2 because the Transfer drum because of the delay on the Feed speed of the sheets a smaller medium Peripheral speed as the plate cylinder 2 or with has the same circumferential speed rotating printing cylinder 4, but after every half revolution of the impression cylinder 4 or one revolution of the plate cylinder 2 and one revolution the transfer drum 34 whose gripper system 49 one of the Gripper systems 50, 51 must face each other for sheet transfer.
  • the Transfer drum can also be used with two gripper systems be carried out. Then their diameter increases corresponding.
  • the transfer drum 34 is firmly seated on a shaft 35 on the a pinion 36 is also fitted.
  • the pinion 36 meshes with a gear 37, which together with a support plate 38 on a to the shaft 35 parallel shaft 39 is placed.
  • the support disk 38 carries four carrier rollers 40 to 43.
  • the carrier rollers work in pairs with the two side flanks of a raised one spatial control curve 46 together.
  • the control cam 46 is on a main drive shaft 47 of the Printing machine put on.
  • the main drive shaft 47 carries a bevel gear 48 per printing unit, with which downstream gears the cylinders 2 to 4 in itself known, not shown are driven.
  • the ropes 22 therefore begin unwind from the disks 21 and the conveyor roller 18 in Accelerate in the direction of arrow c. At the same time it swings Control shaft 30, the lever 31 and thereby brings the pressure roller 32nd on the arch.
  • the control disks 28 are now so eccentric mounted that the levers with a further rotation of the shaft 29 23 to deflect growing paths and thus the conveyor roller 18 and as a result also accelerate the bow.
  • the Clamping the sheet between the conveyor roller 18 and the Pinch rollers 32 ensure that regardless of its strength and Ripple, its at the pre-alignment mark 33 aligned front edge without the risk of misalignment Transfer drum 34 is moved.
  • the arch reaches the end of the feed table 5 with one Speed slightly higher than the peripheral speed the transfer drum 34 is in this moment, so runs Sheet in the open gripper system 49 and comes to System on the front mark 50. Then the grippers close of the gripper system 49. The sheet thus runs to the front mark 50 at a speed below the speed of the Sheet when printing. A rebound or a deformation of the Arch can therefore be used despite a very large one Avoid machine speed. Furthermore, his Acceptance from the feed table 5 not to fear that he sweeps the following bow.
  • the transfer drum 34 is by means of the unevenly translating gear 38 to 46 accelerates until the peripheral speed of the transfer drum 34 is approximately equal to that Circumferential speed of the printing cylinder 4 is.
  • the grabs pass of the gripper system 49 of the transfer drum 34 the sheet to the Gripper e.g. of the gripper system 52 of the printing cylinder 4, which with constant high speed.
  • the same feed table 5 with the conveyor roller 18, the pressure rollers 32 and the pre-alignment marker 33 are used is also provided in the first embodiment.
  • a pressure cylinder 60 right away behind the end of the feed table 5 is a pressure cylinder 60 a front mark 59 and a bow on this mark defining gripper system 61 is provided.
  • the one on a shaft 62 seated impression cylinder 60 acts with a blanket cylinder 63 together, which sits on a shaft 64.
  • the blanket cylinder 63 is in turn connected to a plate cylinder 65 on a shaft 66 employed.
  • the gear 75 is still both engaged with a gear 76 that is fixed sits on the shaft 66 of the plate cylinder 65, and a gear 77, which is firmly placed on the shaft 62 and in one area 78 has no teeth.
  • On the shaft 62 is still one Carried disc 79, which carries a driving roller 80.
  • the driving roller 80 can have a spatial control curve 81 cooperate with a bevel gear 83 via a shaft 82 connected is.
  • the bevel gear 83 meshes with one on the Main drive shaft 67 further bevel gear 84.
  • Die Control curve 81 of the non-uniformly gearbox 79 to 81 is designed so that it engages the driver roller 80 takes along when the area 78 of the gear 77 on the gear 75 passes by.
  • the shape of the control curve 81 is also selected so that that in this area the support disk 79 is initially delayed and then accelerated again until the support disk 79 and thus the gear 77 again the same peripheral speed as that Have gear 75. The delay takes place down to a value in the case of the pressure cylinder 60 placed on the shaft 62 Has peripheral speed that is slightly below the Feed speed of the sheet from the feed table 5 is.
  • the tooth-free area begins 78 of the gear 77 opposite the gear 75 again, so that Gear 75 the shaft 62 and thus the pressure cylinder 60 no further drives.
  • the driving roller 80 arrives again in the area of the control curve 81, in which it is free of play is guided so that the drive of the printing cylinder on the Control curve 81 takes place.
  • Their effective area is now delayed the printing cylinder 60 in turn to a peripheral speed in the next sheet can be taken over.
  • the plate cylinder 65 and the blanket cylinder 63 are also during the Acceleration and deceleration of the printing cylinder over the Gears 71, 74, 75 and 76 at machine speed driven.
  • the average Circumferential speed of the impression cylinder 60 is lower than the peripheral speed of the blanket cylinder 63 or Plate cylinder 65, which are both the same size, is the Dimension the diameter of the impression cylinder accordingly smaller.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Übergabe von Bogen an ein mindestens einen Plattenzylinder und einen Druckzylinder aufweisendes Druckwerk einer Bogen-Rotationsdruckmaschine.The invention relates to a device for transferring sheets to at least one plate cylinder and one impression cylinder Printing unit of a sheet-fed rotary printing press.

Eine Vorrichtung zur Übergabe von Bogen an den Druckzylinder einer Bogen-Rotationsdruckmaschine zeigt die FR-A-2 287 997. Danach wird der Druckbogen von einem Anlegetisch in die Greifer einer zunächst stillstehenden Vorgreifertrommel gefördert. Sodann wird die Vorgreifertrommel mit dem Bogen auf Druckgeschwindigkeit beschleunigt und übergibt ihn mit Druckgeschwindigkeit an eine ebenfalls mit Druckgeschwindigkeit umlaufende Anlegetrommel. Von ihr wird der Bogen an den ebenfalls diese Umfangsgeschwindigkeit aufweisenden Druckzylinder übergeben. Diese Übergabevorrichtung ist hinsichtlich der Geschwindigkeit der Bogen begrenzt und setzt somit die Grenze für die Druckleistung der Bogen-Rotationsdruckmaschine. Die hohen Geschwindigkeiten, auf die die Bogen gebracht werden müssen, bedingen starke Beschleunigungen, die unzulässige Passerfehler bei der Bogenübergabe verursachen.A device for transferring sheets to the impression cylinder Sheet-fed rotary printing machine shows the FR-A-2 287 997. After that the printed sheet from a feed table into the gripper one initially stationary pre-gripper drum promoted. Then the Pre-gripper drum with the sheet at printing speed accelerates and transfers it to a printer at print speed feed drum rotating also at printing speed. Of you will bow at the same this peripheral speed hand over printing cylinder. This transfer device is limited in terms of the speed of the bow and thus sets the limit for the printing performance of the sheet-fed rotary printing press. The high speeds to which the sheets are brought must cause strong accelerations, the impermissible Cause register errors in the sheet transfer.

Die US-A-2 687 886 zeigt eine Bogen-Rotationsdruckmaschine, bei der der Bogen zunächst mittels schräg laufender Bänder seitlich ausgerichtet und anschließend zur Anlage an eine Förderwalze gebracht wird. Letztere arbeitet mit einer unter Schwerkraft ständig aufliegenden Belastungsrolle zusammen und beschleunigt den Bogen unter Reibschluß auf Druckgeschwindigkeit und schießt ihn in die Greifer eines Druckzylinders oder einer Walze, die mit ebenfalls dieser Geschwindigkeit umlaufen, ein. Auch hier ist eine zuverlässige Bogenübergabe bei höherer Geschwindigkeit nicht mehr gegeben. US-A-2 687 886 shows a sheet-fed rotary printing press in which the arch is initially to the side using oblique bands aligned and then to the system on a conveyor roller brought. The latter works constantly with a gravity resting load roller together and accelerates the bow frictional to print speed and shoots him in the Gripper of a printing cylinder or a roller that also with circulate at this speed. Here is one too reliable sheet transfer at higher speeds no longer given.

Aus der DE-A-3 305 219 und der DE-B-1 123 678 ist eine stufenweise Beschleunigung von Bogen von einem Anlegetisch zu einer Zuführtrommel oder einem Druckzylinder bekannt.From DE-A-3 305 219 and DE-B-1 123 678 is a gradual acceleration of arcs from a feed table to a feed drum or known a printing cylinder.

Außerdem ist die Verwendung von Förderwalzen zu diesem Zweck bekannt.In addition, the use of conveyor rollers to this Purpose known.

Aus der DE-A-2 452 051 ist die einstellbare Anordnung den Schrägstellung von Transportbändern zu Transportrichtung auf einem Anlegetisch bekannt. The adjustable arrangement is known from DE-A-2 452 051 the inclination of conveyor belts to the direction of transport known on a jetty.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung dieser Gattung zu schaffen, die bei einfachem Aufbau mit wenigen bewegten Bogenförderelementen, dem Druckwerk pro Zeiteinheit eine große Zahl von Bogen unabhängig von deren Stärke oder Welligkeit passerhaltig zuführen kann, also den Betrieb der Druckmaschine mit sehr hohen Geschwindigkeiten ermöglicht.The invention has for its object a device of this To create genus with a simple structure with a few moving sheet conveying elements, the printing unit per unit of time a large number of sheets regardless of their strength or ripple can pass in register, that is Operation of the printing press at very high speeds enables.

Erfindungsgemäß wird dies durch Anwendung der Maßnahmen von Anspruch 1 oder Anspruch 2 errreicht.According to the invention, this is achieved by applying the measures of Claim 1 or Claim 2 achieved.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung zweier Ausführungsbeispiele der Erfindung anhand der Zeichnung. Es zeigt:

Fig. 1
eine schematische Seitenansicht des ersten Druckwerkes einer Bogen-Rotationsdruckmaschine,
Fig. 2
eine Ansicht des Anlegetisches von oben,
Fig. 3
eine schematische Seitenansicht eines ungleichförmig übersetzenden Getriebes.
Fig. 4
eine der Fig. 1 entsprechende Darstellung der wesentlichen Teile eines zweiten Ausführungsbeispiels,
Fig. 5
eine schematische Seitenansicht des Getriebes der Anordnung nach Fig. 4 und
Fig. 6
eine Ansicht des Getriebes nach Fig. 5 von vorn, wobei die Achse der Zylinder und Trommeln in eine Ebene gelegt sind.
Further features and advantages of the invention emerge from the subclaims and the following description of two exemplary embodiments of the invention with reference to the drawing. It shows:
Fig. 1
2 shows a schematic side view of the first printing unit of a sheet-fed rotary printing press,
Fig. 2
a view of the feed table from above,
Fig. 3
a schematic side view of a non-uniformly translating gear.
Fig. 4
1 corresponding representation of the essential parts of a second embodiment,
Fig. 5
is a schematic side view of the transmission of the arrangement of FIGS. 4 and
Fig. 6
a view of the transmission of FIG. 5 from the front, the axis of the cylinders and drums are placed in one plane.

Das in Fig. 1 dargestellte, insgesamt mit 1 bezeichnete Druckwerk umfaßt einen Plattenzylinder 2, einen Gummituchzylinder 3 und einen Druckzylinder 4. Der Druckzylinder 4 weist den doppelten Durchmesser der Zylinder 2, 3 auf und trägt zwei Greifersysteme 51, 52. Es handelt sich also um ein Offsetdruckwerk. Die Erfindung ist jedoch nicht auf die Anwendung bei Offsetdruckwerken beschränkt, sie kann vielmehr auch bei jeder anderen Druckwerksart, also Hochdruck- oder Tiefdruckwerken Anwendung finden.The printing unit shown in Fig. 1, generally designated 1 comprises a plate cylinder 2, a blanket cylinder 3 and a printing cylinder 4. The printing cylinder 4 has double Diameter of the cylinders 2, 3 and carries two gripper systems 51, 52. It is therefore an offset printing unit. The However, invention is not for application to Offset printing units limited, it can rather with everyone another type of printing unit, i.e. high-pressure or gravure printing units Find application.

Die Druckmaschine umfaßt weiterhin einen Anlegetisch 5, dem die Bogen einzeln in an sich bekannter nicht näher dargestellter Weise in Richtung des Pfeiles a zugeführt werden. Im Anlegetisch 5 sind mehrere Transportbänder 6, 7, 8, 9 vorgesehen, die über je zwei Umlenkrollen 10, 11 sowie Spannrollen 12, 13 laufen, Mindestens eine der Umlenkrollen 10, 11 ist angetrieben, und zwar derart, daß das obere Trum der Transportbänder in Richtung des Pfeiles b läuft. Die Transportbänder 6 bis 9 laufen somit unter einem spitzen Winkel zur Zuführ- und Förderrichtung der Bogen, die mit dem Pfeil a bezeichnet ist. Zweckmäßig sind die Umlenkrollen 10, 11 mit den Spannrollen 12, 13 an einem Träger 14 befestigt, der um eine Achse 15 drehbar gelagert ist, um den spitzen Winkel zwischen der Förderrichtung der Bogen, Pfeil a, und der Transportrichtung der Transportbänder 6 bis 9, Pfeil b, einstellen zu können. The printing press further comprises a feed table 5, which the Sheet individually in a known, not shown Be fed in the direction of arrow a. In the feed table 5, several conveyor belts 6, 7, 8, 9 are provided, each over two deflection rollers 10, 11 and tension rollers 12, 13 run, At least one of the deflection rollers 10, 11 is driven, specifically such that the upper run of the conveyor belts in the direction of Arrow b is running. The conveyor belts 6 to 9 thus run underneath an acute angle to the feeding and conveying direction of the sheets, which is indicated by the arrow a. They are useful Deflection rollers 10, 11 with the tensioning rollers 12, 13 on a carrier 14 attached, which is rotatably mounted about an axis 15 to the acute angle between the conveying direction of the bow, arrow a, and the transport direction of the conveyor belts 6 to 9, arrow b, to be able to adjust.

An dem dem Druckwerk 1 zugewandten Ende des Anlegetisches 5 sind beiderseits je eine Seitenmarke 16, 17 fest angebracht. Bei der Einstellung gemäß Fig. 2 führen die Transportbänder 6 bis 9 jeden Bogen mit einer quer zur Förderrichtung a gerichteten Bewegungskomponente gegen die Seitenmarke 16 und bewirken hierdurch eine Seitenausrichtung des Bogens während seines Transportes. Durch die drehbare Anordnung des Trägers 14 besteht weiterhin die Möglichkeit, die Bogen auch gegen die Seitenmarke 17 zu führen und dort seitlich auszurichten. Eine quer zur Förderrichtung gerichtete Bewegungskomponente kann dem Bogen auch dadurch erteilt werden, daß zusätzlich zu in Förderrichtung umlaufenden Förderbändern oder Förderrollen schräg dazu blasende Luftdüsen oder ein schräg bzw. quer dazu umlaufendes zusätzliches Förderband vorgesehen ist.At the end of the feed table 5 facing the printing unit 1 a side mark 16, 17 fixed on both sides. In the 2 guide the conveyor belts 6 to 9 each Bow with a transverse to the conveying direction a Movement component against the side mark 16 and cause this results in a side orientation of the sheet during its Transport. Due to the rotatable arrangement of the carrier 14 furthermore the possibility to turn the sheet against the side mark 17 to guide and align there laterally. One across Movement component directed in the conveying direction can also be the bow be granted in addition to in the conveying direction revolving conveyor belts or conveyor rollers blowing obliquely to it Air nozzles or an additional one running diagonally or transversely to it Conveyor belt is provided.

In Förderrichtung a hinter den Seitenmarken 16, 17 ist im Anlegetisch eine Förderwalze 18 angeordnet, die sich über die gesamte Breite des Anlegetisches 5 erstreckt. Um die Achse 19 der Förderwalze 18 ist eine Spiralfeder gewickelt, deren eines Ende an einem festen Teil des Anlegetisches 5 angeschlossen ist, während das andere Ende an der Förderwalze 18 befestigt ist. Die Spiralfeder hat die Tendenz, die Förderwalze 18 entgegen Richtung des Pfeiles c zu drehen. An beiden Enden der Förderwalze 18 ist je eine Scheibe 21 befestigt, an der das eines Ende eines Seiles 22 angeschlossen ist und auf die ein Teil des Seiles aufgewickelt werden kann. Das andere Ende des Seiles 22 ist an je einem Hebel 23 befestigt, der um eine Achse 24 schwenkbar ist. Jeder Hebel 23 trägt eine Rolle 25, die mittels einer an einer festen Platine 26 abgestützten, mit dem anderen Ende am Hebel 23 angreifenden Druckfeder 27 in Anlage an einer Steuerscheibe 28 gehalten ist. Die beiden Steuerscheiben 28 sitzen fest auf einer synchron mit der Maschinendrehzahl angetriebenen Welle 29. Anstelle dieses Antriebs kann auch ein anderer die Förderwalze abwechselnd beschleunigender und verzögernder Antrieb Verwendung finden. In the conveying direction a behind the side marks 16, 17 is in A feed roller 18 arranged over the feed table extends over the entire width of the feed table 5. About axis 19 the feed roller 18 is wound a coil spring, one end of which is connected to a fixed part of the feed table 5, while the other end is attached to the conveyor roller 18. The Coil spring tends to move the feed roller 18 in the opposite direction arrow c to rotate. At both ends of the conveyor roller 18 is each a disc 21 is attached to which one end of a rope 22nd is connected and on which part of the rope is wound can be. The other end of the rope 22 is on a lever 23 attached, which is pivotable about an axis 24. Each lever 23 carries a roller 25, which by means of a fixed board 26th supported, with the other end engaging the lever 23 Compression spring 27 is held in contact with a control disk 28. The two control disks 28 are seated on a synchronous with the Machine speed driven shaft 29. Instead of this drive another can alternately accelerate the conveyor roller and decelerating drive are used.

Oberhalb des Anlegetisches 5 sind an einer durchlaufenden Achse 30 mehrere Schwenkhebel 31 befestigt, an derem freien Ende je frei drehbar eine Andruckrolle 32 gelagert ist. Die Achse 30 ist wiederum synchron zur Maschinengeschwindigkeit so gesteuert, daß die Andruckrollen 32 zeitweilig gegen die Förderwalze 18 angedrückt und zeitweise von dieser abgehoben sind. Hinter der Förderwalze 18 is am Anlegetisch in bekannter Weise schwenkbar eine Vorausrichtungs-Vordermarke 33 gelagert, die aus mehreren sich über die Breite des Anlegetisches verteilt angeordneten Anschlägen besteht.Above the feed table 5 are on a continuous axis 30 several swivel levers 31 attached, at their free end each a pressure roller 32 is freely rotatable. The axis 30 is in turn controlled synchronously with the machine speed, that the pressure rollers 32 temporarily against the conveyor roller 18 pressed and temporarily lifted from this. Behind the Conveyor roller 18 is pivotable on the feed table in a known manner a pre-alignment token 33 stored, made up of several arranged across the width of the feed table Attacks exists.

Oberhalb des Endes des Anlegetisches 5 ist eine Überführtrommel 34 mit einem Greifersystem 49 und einer Vordermarke 50 angeordnet. Der Durchmesser der Überführtrommel 34 ist kleiner als der Durchmesser des Plattenzylinders 2, da die Überführtrommel wegen der Verzögerung auf die Zuführgeschwindigkeit der Bogen eine kleinere mittlere Umfangsgeschwindigkeit als der Plattenzylinder 2 bzw. der mit gleicher Umfangsgeschwindigkeit umlaufende Druckzylinder 4 hat, aber nach jeweils einer halben Umdrehung des Druckzylinders 4 bzw. einer Umdrehung des Plattenzylinders 2 und einer Umdrehung der Überführtrommel 34 deren Greifersystem 49 einem der Greifersysteme 50, 51 zur Bogenübergabe gegenüberstehen muß. Die Überführtrommel kann jedoch auch mit zwei Greifersystemen ausgeführt werden. Dann vergrößert sich ihr Durchmesser entsprechend.Above the end of the feed table 5 is a transfer drum 34 with a gripper system 49 and a front label 50 arranged. The diameter of the transfer drum 34 is smaller than the diameter of the plate cylinder 2 because the Transfer drum because of the delay on the Feed speed of the sheets a smaller medium Peripheral speed as the plate cylinder 2 or with has the same circumferential speed rotating printing cylinder 4, but after every half revolution of the impression cylinder 4 or one revolution of the plate cylinder 2 and one revolution the transfer drum 34 whose gripper system 49 one of the Gripper systems 50, 51 must face each other for sheet transfer. The Transfer drum can also be used with two gripper systems be carried out. Then their diameter increases corresponding.

Die Überführtrommel 34 sitzt fest auf einer Welle 35, auf die weiterhin ein Ritzel 36 aufgesetzt ist. Das Ritzel 36 kämmt mit einem Zahnrad 37, das gemeinsam mit einer Tragscheibe 38 auf eine zur Welle 35 parallelen Welle 39 aufgesetzt ist. Die Tragscheibe 38 trägt vier Mitnehmerrollen 40 bis 43. Die Mitnehmerrollen wirken paarweise mit den beiden Seitenflanken einer erhabenen räumlichen Steuerkurve 46 zusammen. Die Teile 38 bis 46 bilden ein ungleichförmig übersetzendes Getriebe, das die Überführtrommel 34 laufend von einer niedrigen auf eine hohe Umfangsgeschwindigkeit beschleunigt, kurzfristig auf dieser hohen Umfangsgeschwindigkeit bleibt, dann verzögert und anschließend kurzfristig auf der niedrigen Umfangsgeschwindigkeit bleibt.The transfer drum 34 is firmly seated on a shaft 35 on the a pinion 36 is also fitted. The pinion 36 meshes with a gear 37, which together with a support plate 38 on a to the shaft 35 parallel shaft 39 is placed. The support disk 38 carries four carrier rollers 40 to 43. The carrier rollers work in pairs with the two side flanks of a raised one spatial control curve 46 together. Form the parts 38 to 46 a non-uniformly geared transmission that the transfer drum 34 ongoing from low to high Peripheral speed accelerates, in the short term at this high The peripheral speed remains, then decelerates and then remains on the low peripheral speed for a short time.

Die Steuerkurve 46 ist auf eine Hauptantriebswelle 47 der Druckmaschine aufgesetzt. Die Hauptantriebswelle 47 trägt weiterhin pro Druckwerk ein Kegelrad 48, mit dem über nachgeschaltete Zahnräder die Zylinder 2 bis 4 in an sich bekannter, nicht dargestellter Weise angetrieben werden.The control cam 46 is on a main drive shaft 47 of the Printing machine put on. The main drive shaft 47 carries a bevel gear 48 per printing unit, with which downstream gears the cylinders 2 to 4 in itself known, not shown are driven.

Wird ein Bogen in Richtung des Pfeiles a auf den Anlegetisch 5 geführt, so wird er nach einer kurzen Wegstrecke von den Transportbändern 6 bis 9 erfaßt und nunmehr in Richtung des Pfeiles b gegen die Seitenmarke 16 geführt. Dadurch erfolgt die Seitenausrichtung bereits während der Zufuhr jedes Bogens. Es wird also hierfür keine zusätzliche Zeit benötigt, während der sich der zur Seite hin auszurichtende Bogen nicht in Förderrichtung bewegt. Infolgedessen kann die Schuppung, mit der die Bogen über den Anlegetisch 5 laufen, sehr dicht sein. Liegt die Vorderkante des Bogens an der Vorausrichtungs-Vordermarke 33 an, so beginnen die Steuerscheiben 28, die Hebel 23 über die Rollen 25 entgegen der Wirkung der Druckfedern 27 auszulenken. Die Seile 22 beginnen daher sich von den Scheiben 21 abzuwickeln und die Förderwalze 18 in Richtung des Pfeiles c zu beschleunigen. Gleichzeitig schwenkt die Steuerwelle 30 den Hebel 31 und bringt dadurch die Andruckrolle 32 zur Anlage am Bogen. Die Steuerscheiben 28 sind nun so exzentrisch gelagert, daß sie bei einer weiteren Drehung der Welle 29 die Hebel 23 um wachsende Wege auslenken und damit die Förderwalze 18 und infolgedessen auch den Bogen beschleunigen. Dabei stellt die Klemmung des Bogens zwischen der Förderwalze 18 und den Andruckrollen 32 sicher, daß, unabhängig von seiner Stärke und Welligkeit, seine an der Vorausrichtungs-Vordermarke 33 ausgerichtete Vorderkante ohne die Gefahr einer Schiefstellung zur Überführtrommel 34 bewegt wird. If an arc is drawn in the direction of arrow a on the feed table 5 after a short distance from the Conveyor belts 6 to 9 detected and now in the direction of the arrow b led against the side mark 16. This takes place Alignment of the page during the feeding of each sheet. It will So no additional time is required during which the sheets to be aligned to the side are not moved in the conveying direction. As a result, the desquamation with which the arches over the Run table 5, be very tight. Is the front edge of the Arc at the pre-alignment mark 33, so begin Control discs 28, the lever 23 on the rollers 25 against the Deflect action of the compression springs 27. The ropes 22 therefore begin unwind from the disks 21 and the conveyor roller 18 in Accelerate in the direction of arrow c. At the same time it swings Control shaft 30, the lever 31 and thereby brings the pressure roller 32nd on the arch. The control disks 28 are now so eccentric mounted that the levers with a further rotation of the shaft 29 23 to deflect growing paths and thus the conveyor roller 18 and as a result also accelerate the bow. The Clamping the sheet between the conveyor roller 18 and the Pinch rollers 32 ensure that regardless of its strength and Ripple, its at the pre-alignment mark 33 aligned front edge without the risk of misalignment Transfer drum 34 is moved.

Erreicht der Bogen das Ende des Anlegetisches 5 mit einer Geschwindigkeit, die etwas höher als die Umfangsgeschwindigkeit der Überführtrommel 34 in diesem Augenblick ist, so läuft der Bogen in das geöffnete Greifersystem 49 ein und kommt dabei zur Anlage an der Vordermarke 50. Anschließend schließen die Greifer des Greifersystems 49. Der Bogen läuft somit an die Vordermarke 50 mit einer Geschwindigkeit an, die unter der Geschwindigkeit des Bogens beim Druck liegt. Ein Rückprallen oder eine Deformation des Bogens läßt sich daher trotz einer sehr großen Maschinengeschwindigkeit vermeiden. Weiterhin ist auch bei seiner Abnahme vom Anlegetisch 5 nicht zu befürchten, daß er den nachfolgenden Bogen mitreißt.The arch reaches the end of the feed table 5 with one Speed slightly higher than the peripheral speed the transfer drum 34 is in this moment, so runs Sheet in the open gripper system 49 and comes to System on the front mark 50. Then the grippers close of the gripper system 49. The sheet thus runs to the front mark 50 at a speed below the speed of the Sheet when printing. A rebound or a deformation of the Arch can therefore be used despite a very large one Avoid machine speed. Furthermore, his Acceptance from the feed table 5 not to fear that he sweeps the following bow.

Nach Übernahme des Bogens wird die Überführtrommel 34 mittels des ungleichförmig übersetzenden Getriebes 38 bis 46 beschleunigt, bis die Umfangsgeschwindigkeit der Überführtrommel 34 etwa gleich der Umfangsgeschwindigkeit des Druckzylinders 4 ist. Zweckmäßig ist das ungleichförmig übersetzende Getriebe 38 bis 46 so ausgelegt, daß die Überführtrommel 34 noch geringfügig beschleunigt wird, wenn die Bogenübergabe beginnt. Hierdurch wird erreicht, daß ein die exakte Übergabe des Bogens störender Zahnflankenwechsel im Antrieb der Überführtrommel 34 vermieden wird. Nunmehr übergeben die Greifer des Greifersystems 49 der Überführtrommel 34 den Bogen an die Greifer z.B. des Greifersystems 52 des Druckzylinders 4, der mit konstanter hoher Geschwindigkeit umläuft. Dabei ergibt sich durch den größeren Durchmesser des Druckzylinders 4 der Vorteil, daß der Weg, der für die Bogenübergabe vom Greifersystem 49 auf das Greifersystem 51 oder 52 zur Verfügung steht, länger als bei Übergabe an einem Druckzylinder kleineren Durchmessers und nur einem Greifersystem ist. Ein noch längerer Übergabeweg kann erreicht werden, wenn auch die Überführtrommel mit zwei Greifersystemen am Umfang und einem entsprechend größeren Durchmesser ausgeführt wird. After taking over the sheet, the transfer drum 34 is by means of the unevenly translating gear 38 to 46 accelerates until the peripheral speed of the transfer drum 34 is approximately equal to that Circumferential speed of the printing cylinder 4 is. This is useful non-uniformly gear ratio 38 to 46 designed so that the transfer drum 34 is still slightly accelerated when the Sheet transfer begins. This ensures that the exact Handover of the arc of disruptive tooth flank changes in the drive of the Transfer drum 34 is avoided. Now the grabs pass of the gripper system 49 of the transfer drum 34 the sheet to the Gripper e.g. of the gripper system 52 of the printing cylinder 4, which with constant high speed. It results from the larger diameter of the impression cylinder 4 the advantage that the Path for the sheet transfer from the gripper system 49 to the Gripper system 51 or 52 is available, longer than at Transfer to a printing cylinder of smaller diameter and only a gripper system. An even longer transfer route can can be achieved, even if the transfer drum with two Gripper systems on the circumference and a correspondingly larger one Diameter is executed.

Unmittelbar nach Übergabe des Bogens an das Greifersystem 51 verzögert das ungleichförmig übersetzende Getriebe 38 bis 46 die Drehung der Überführtrommel 34 bis diese wiederum eine Umfangsgeschwindigkeit erreicht, die etwas unter der Geschwindigkeit liegt, mit der der nächste Bogen vom Anlegetisch 5 zugeführt wird.Immediately after the sheet has been transferred to the gripper system 51 decelerates the gear 38 to 46 non-uniformly the Rotation of the transfer drum 34 until this one again Peripheral speed reached slightly below the The speed at which the next sheet is off the feed table 5 is fed.

Beim Ausführungsbeispiel nach Fig. 4 bis 6 kann wiederum der gleiche Anlegetisch 5 mit der Förderwalze 18, den Andruckrollen 32 und der Vorausrichtungs-Vordermarke 33 Verwendung finden, der auch beim ersten Ausführungsbeispiel vorgesehen ist. Unmittelbar hinter dem Ende des Anlegetisches 5 ist ein Druckzylinder 60 mit einer Vordermarke 59 und einem den Bogen an dieser Marke festlegendem Greifersystem 61 vorgesehen. Der auf einer Welle 62 sitzende Druckzylinder 60 wirkt mit einem Gummituchzylinder 63 zusammen, der auf einer Welle 64 sitzt. Der Gummituchzylinder 63 ist seinerseits an einen Plattenzylinder 65 auf einer Welle 66 angestellt.In the embodiment of FIGS. 4 to 6, the same feed table 5 with the conveyor roller 18, the pressure rollers 32 and the pre-alignment marker 33 are used is also provided in the first embodiment. Right away behind the end of the feed table 5 is a pressure cylinder 60 a front mark 59 and a bow on this mark defining gripper system 61 is provided. The one on a shaft 62 seated impression cylinder 60 acts with a blanket cylinder 63 together, which sits on a shaft 64. The blanket cylinder 63 is in turn connected to a plate cylinder 65 on a shaft 66 employed.

Wie sich aus den Fig. 5 und 6 ergibt, erfolgt der Antrieb der Zylinder 60, 63 und 65 von einer Hauptantriebswelle 67. Auf diese ist ein Kegelrad 68 aufgesetzt, das mit einem weiteren Kegelrad 69 kämmt. Fest mit dem Kegelrad 69 ist ein Ritzel 70 verbunden, das in ein Zahnrad 71 eingreift. Das Zahnrad 71 sitzt auf einer Welle 72 auf die fest eine Transporttrommel 73 aufgesetzt ist. Die mit Greifern versehene Transporttrommel 73 dient der Abnahme der Bogen vom Druckzylinder 60. Das Zahnrad 71 kämmt seinerseits mit einem Zahnrad 74, das lose drehbar auf die Welle 62 des Druckzylinders 60 aufgesetzt ist. Das Zahnrad 74 steht mit einem weiteren breiteren Zahnrad 75 in Eingriff, das fest auf die Welle 64 des Gummituchtuchzylinders 63 aufgesetzt ist. Das Zahnrad 75 steht weiterhin sowohl in Eingriff mit einem Zahnrad 76, das fest auf der Welle 66 des Plattenzylinders 65 sitzt, und einem Zahnrad 77, das fest auf die Welle 62 aufgesetzt ist und in einem Bereich 78 keine Zähne aufweist. Auf die Welle 62 ist weiterhin eine Tragscheibe 79 aufgesetzt, die eine Mitnehmerrolle 80 trägt. 5 and 6, the drive of the Cylinders 60, 63 and 65 from a main drive shaft 67. On this a bevel gear 68 is fitted, which is connected to a further bevel gear 69 combs. A pinion 70 is fixedly connected to the bevel gear 69 engages in a gear 71. The gear 71 sits on a shaft 72 on which a transport drum 73 is firmly attached. With Grab drum 73 is used to remove the Sheet from the impression cylinder 60. The gear 71 in turn meshes with a gear 74 which rotates loosely on the shaft 62 of the Printing cylinder 60 is placed. The gear 74 stands with one another wider gear 75 is engaged, which firmly on the shaft 64 of the blanket cylinder 63 is placed. The gear 75 is still both engaged with a gear 76 that is fixed sits on the shaft 66 of the plate cylinder 65, and a gear 77, which is firmly placed on the shaft 62 and in one area 78 has no teeth. On the shaft 62 is still one Carried disc 79, which carries a driving roller 80.

Die Mitnehmerrolle 80 kann mit einer räumlichen Steuerkurve 81 zusammenwirken, die über eine Welle 82 fest mit einem Kegelrad 83 verbunden ist. Das Kegelrad 83 kämmt mit einem auf die Hauptantriebswelle 67 aufgesetzten weiteren Kegelrad 84. Die Steuerkurve 81 des ungleichförmig übersetzenden Getriebes 79 bis 81 ist so ausgelegt, daß sie die Mitnehmerrolle 80 formschlüssig mitnimmt, wenn der Bereicht 78 des Zahnrades 77 am Zahnrades 75 vorbeiläuft. Die Form der Steuerkurve 81 ist weiterhin so gewählt, daß in diesem Bereich die Tragscheibe 79 zunächst verzögert und dann wiederum beschleunigt wird bis die Tragscheibe 79 und damit das Zahnrad 77 wieder die gleiche Umfangsgeschwindigkeit wie das Zahnrad 75 haben. Die Verzögerung erfolgt dabei bis auf einen Wert, bei dem auf die Welle 62 aufgesetzte Druckzylinder 60 eine Umfangsgeschwindigkeit hat, die geringfügig unter der Zufuhrgeschwindigkeit des Bogens vom Anlegetisch 5 liegt.The driving roller 80 can have a spatial control curve 81 cooperate with a bevel gear 83 via a shaft 82 connected is. The bevel gear 83 meshes with one on the Main drive shaft 67 further bevel gear 84. Die Control curve 81 of the non-uniformly gearbox 79 to 81 is designed so that it engages the driver roller 80 takes along when the area 78 of the gear 77 on the gear 75 passes by. The shape of the control curve 81 is also selected so that that in this area the support disk 79 is initially delayed and then accelerated again until the support disk 79 and thus the gear 77 again the same peripheral speed as that Have gear 75. The delay takes place down to a value in the case of the pressure cylinder 60 placed on the shaft 62 Has peripheral speed that is slightly below the Feed speed of the sheet from the feed table 5 is.

Wird dem Druckzylinder 60 vom Anlegetisch 5 mittels der Förderwalze 18 ein Bogen zugeführt, so schließen im Augenblick des Anlaufs des Bogens an der Vordermarke 59 die Greifer des Greifersystems 61. Unmittelbar danach beginnt die Steuerkkurve 81 die Welle 62 des Druckzylinders 60 zu beschleunigen. Hat der Druckzylinder 60 die Umfangsgeschwindigkei des Gummituchzylinders 63 erreicht, so greift die Verzahnung des Zahnrades 77 in das Zahnrad 75 ein. Nunmehr wird der Druckzylinder 60 über das Zahnrad 75 angetrieben. In diesem Bereich ist die Rolle 80 mit der Steuerkurve 81 nicht im Eingriff so daß sie den Antrieb vom Zahnrad 75 nicht beeinträchtigt. Nunmehr erfolgt der Druck des am Druckzylinder 60 geführten Bogens. Dieser Bogen wird dann in bekannter, nicht näher dargestellter Weise über die Transporttrommel 73 abgeführt.Is the printing cylinder 60 from the feed table 5 by means of the conveyor roller 18 fed a sheet, so close at the start of the The gripper of the gripper system 61 on the front mark 59. Immediately afterwards, the control curve 81 starts the shaft 62 of the Accelerate printing cylinder 60. Has the impression cylinder 60 Reached circumferential speed of the blanket cylinder 63, so engages the toothing of the gear 77 in the gear 75. Now will the pressure cylinder 60 driven by the gear 75. In this In the area, the roller 80 is not in engagement with the control cam 81 so that it does not affect the drive from the gear 75. Now the sheet guided on the printing cylinder 60 is printed. This Arch is then in a known, not shown manner the transport drum 73 removed.

Nach Beendigung des Drucks steht der Beginn des zahnfreien Bereichs 78 des Zahnrades 77 dem Zahnrad 75 erneut gegenüber, so daß das Zahnrad 75 die Welle 62 und damit den Druckzylinder 60 nicht weiter antreibt. In diesem Augenblick gelangt die Mitnehmerrolle 80 wiederum in den Bereich der Steuerkurve 81, in dem sie spielfrei geführt ist, so daß der Antrieb des Druckzylinders über die Steuerkurve 81 erfolgt. Deren wirksamer Bereich verzögert nunmehr den Druckzylinder 60 wiederum auf eine Umfangsgeschwindigkeit in der der nächste Bogen übernommen werden kann. Der Plattenzylinder 65 und der Gummituchzylinder 63 sind auch während der Beschleunigung und Verzögerung des Druckzylinders über die Zahnräder 71, 74, 75 und 76 mit Maschinengeschwindigkeit angetrieben.After printing is complete, the tooth-free area begins 78 of the gear 77 opposite the gear 75 again, so that Gear 75 the shaft 62 and thus the pressure cylinder 60 no further drives. At this moment, the driving roller 80 arrives again in the area of the control curve 81, in which it is free of play is guided so that the drive of the printing cylinder on the Control curve 81 takes place. Their effective area is now delayed the printing cylinder 60 in turn to a peripheral speed in the next sheet can be taken over. The plate cylinder 65 and the blanket cylinder 63 are also during the Acceleration and deceleration of the printing cylinder over the Gears 71, 74, 75 and 76 at machine speed driven.

Da, bezogen auf eine Umdrehung die durchschnittliche Umfangsgeschwindigkeit des Druckzylinders 60 niedriger ist als die Umfangsgeschwindigkeit des Gummituchzylinders 63 oder des Plattenzylinders 65, die beide gleich groß sind, ist der Durchmesser des Druckzylinders entsprechend kleiner bemessen.There, based on one revolution, the average Circumferential speed of the impression cylinder 60 is lower than the peripheral speed of the blanket cylinder 63 or Plate cylinder 65, which are both the same size, is the Dimension the diameter of the impression cylinder accordingly smaller.

Wie die vorstehenden Ausführungen zeigen, ist die Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt. Beispielsweise könnten auch andere ungleichförmig übersetzende Getriebe ihre Anwendung finden.As the above remarks show, the invention is not limited to the illustrated embodiments. For example, other non-uniform translators could also be used Gearboxes find their application.

Claims (8)

  1. Device for transferring sheets to a printing unit, having at least one plate cylinder (2) and one impression cylinder (4), of a sheet-fed rotary printing machine, having a feed table (5) and a transfer drum (34) arranged at the end of the feed table (5), having at least one front marker (50) and a gripper system (49) holding the sheets on the front marker (50), the gripper system co-operating with the impression cylinder (4) carrying grippers, transport belts (6 to 9) being provided in the feed table (5) which move each sheet with an additional movement component directed transversely to the direction of feed to the printing unit, and circulating with an incline to the direction of feed, the sheet being capable of guidance by these transport means against a fixed lateral marker (16, 17) and a pre-alignment front marker (33), and in the end of the feed table (5) facing the printing unit (1) there is provided a continuous conveyor roller (18), which extends over the entire width of the feed table (5) and co-operates with pressure rollers (32) starting and stopping in sequence, the conveyor roller (18) being driven by means of an alternately accelerating and decelerating drive (21 to 29) and entraining the sheet during its acceleration phase in friction contact and thus accelerating it in the feed direction, furthermore the transfer drum (34) is arranged above the end of the feed table (5) and is driven by means of a non-uniformly transmitting gear unit (38 to 46) in such a way that when a sheet is transferred it is circulating at a speed below the speed of the sheet, then it accelerates, and when the sheet is passed on it has approximately the same circumferential speed as the impression cylinder (4), and the acute angle of the inclined setting between the transport direction of the transport belts (6 to 9) and the direction of feed of the sheets is adjustable.
  2. Device for transferring sheets to a printing unit, having at least one plate cylinder (63) and one impression cylinder (60), of a sheet-fed rotary printing machine, having a feed table (5), transport belts (6 to 9) being provided in the feed table (5) which move each sheet with an additional movement component directed transversely to the direction of feed to the printing unit, and which circulate with an incline to the direction of feed of the sheets, the sheet being capable of guidance by these transport belts against a fixed lateral marker (16, 17) and a pre-alignment front marker (33), in the end of the feed table (5) facing the printing unit there is further provided a continuous conveyor roller (18) which extends over the entire width of the feed table (5) and which co-operates with pressure rollers (32) starting and stopping in sequence, the conveyor roller (18) being driven by means of an alternately accelerating and decelerating drive (21 to 29) and entraining the sheet during its acceleration phase in friction contact and thus accelerating it in the feed direction, furthermore behind the feed table (5) there is arranged the impression cylinder (60) which has at least a front marker (59) and a gripper system (61) holding the sheets on the front marker, and the impression cylinder (60) is driven using a non-uniformly transmitting gear unit (79 to 81) in such a way that when a sheet is transferred it is circulating at a circumferential speed below the speed of the sheet, then it accelerates, and during the printing it circulates at the same circumferential speed as the plate cylinder (63).
  3. Device according to claim 2, characterised in that the acute angle of the inclined setting between the transport direction of the transport belts (6 to 9) and the direction of feed of the sheets is adjustable.
  4. Device according to claim 1 or 2, characterised in that the impression cylinder (4) has two gripper systems (51, 52) on the circumference.
  5. Device according to claim 1, characterised in that the transfer drum has two gripper systems on the circumference.
  6. Device according to claim 1 or 2, characterised in that the non-uniformly transmitting gear unit (38 to 46, 79 to 81) is a three-dimensional cam gear unit.
  7. Device according to claim 1, characterised in that the non-uniformly transmitting gear unit (38 to 46) is designed so that sheet transfer to the impression cylinder (4) is effected at the end of the acceleration phase of the transfer drum (34).
  8. Device according to claim 2, characterised in that the impression cylinder (60) is driven in the acceleration phase and deceleration phase and during pick-up of the sheet from the feed table (5) by means of the non-uniformly transmitting gear unit (79 to 81), but in the printing phase by means of the drive (68 to 71, 74 to 77) of the plate cylinder (65).
EP88110921A 1987-08-12 1988-07-08 Sheet-transferring device Expired - Lifetime EP0303053B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873726780 DE3726780A1 (en) 1987-08-12 1987-08-12 DEVICE FOR TRANSFERING BOWS
DE3726780 1987-08-12

Publications (4)

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EP0303053A2 EP0303053A2 (en) 1989-02-15
EP0303053A3 EP0303053A3 (en) 1990-04-04
EP0303053B1 EP0303053B1 (en) 1992-09-09
EP0303053B2 true EP0303053B2 (en) 2000-10-25

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EP88110921A Expired - Lifetime EP0303053B2 (en) 1987-08-12 1988-07-08 Sheet-transferring device

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JP (1) JP2752381B2 (en)
CA (1) CA1287255C (en)
DE (2) DE3726780A1 (en)

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Also Published As

Publication number Publication date
EP0303053B1 (en) 1992-09-09
DE3726780A1 (en) 1989-02-23
EP0303053A2 (en) 1989-02-15
US4825762A (en) 1989-05-02
JP2752381B2 (en) 1998-05-18
EP0303053A3 (en) 1990-04-04
CA1287255C (en) 1991-08-06
DE3874459D1 (en) 1992-10-15
JPS6469344A (en) 1989-03-15

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