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EP0085751B1 - Rotary machine for offset printing on sheets - Google Patents

Rotary machine for offset printing on sheets Download PDF

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Publication number
EP0085751B1
EP0085751B1 EP82109662A EP82109662A EP0085751B1 EP 0085751 B1 EP0085751 B1 EP 0085751B1 EP 82109662 A EP82109662 A EP 82109662A EP 82109662 A EP82109662 A EP 82109662A EP 0085751 B1 EP0085751 B1 EP 0085751B1
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EP
European Patent Office
Prior art keywords
printing
cylinders
unit
cylinder
machine according
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
Application number
EP82109662A
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German (de)
French (fr)
Other versions
EP0085751A1 (en
Inventor
Hermann Fischer
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP0085751A1 publication Critical patent/EP0085751A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units

Definitions

  • the invention is based on an offset sheet-fed rotary printing press with a plurality of printing units comprising at least one printing cylinder, a blanket cylinder, a plate cylinder and an inking unit and a dampening unit, which are identical to one another and each as a unit, in which the axes of the blanket cylinders are in one plane and the axes of the printing cylinders are arranged in a further plane parallel to this.
  • the invention has for its object to provide an offset sheet-fed rotary printing press of the type mentioned, in which manufacturing costs are reduced by reducing the number of parts required for sheet transport.
  • the configuration according to the invention offers the further significant advantage that, in turn in a very simple manner — again with a minimum of parts — one or more face-printing units can be assigned to back-pressure units.
  • the printing machine according to FIG. 1 comprises four sheet-fed printing units 1 to 4 designed as structural units.
  • Each of the sheet-fed printing units comprises an inking unit 5, 6, 7, 8, a dampening unit 9, 10, 11, 12, a plate cylinder 13, 14, 15, 16 and a blanket cylinder 17, 18, 19, 20.
  • the face printing units 1 to 3 each comprise a printing cylinder 21, 22, 23. No such printing cylinder is inserted in the front printing unit 4, since it is not required for printing.
  • all face-to-face printing units 1 to 4 are otherwise identical and in particular have side walls 24, 25, 26, 27 of the same type which, as shown in FIG. 1, can be connected directly to one another.
  • the rubber cylinders 17 to 19 and the impression cylinders 21 to 23 are equipped with grippers for transporting the sheets.
  • at least the printing cylinder 23 is provided with a device for stretching a rubber blanket.
  • the diameters of the blanket cylinders 17 to 20 and the diameters of the impression cylinders 21 to 23 are identical to one another and twice as large as the diameters of the plate cylinders 13 to 16.
  • the bearings for the cylinders 17 to 23 are arranged so that the axes of the rubber cylinders 17 to 20 lie in a first plane AA shown in broken lines and the axes of the pressure cylinders 21 to 23 in a second plane BB also shown in broken lines.
  • the planes AA and BB expediently run horizontally, so that the sheets are conveyed in the usual manner from a boom arranged in front of the front of the machine to a boom arranged behind the rear.
  • the distance between the two planes A and B is determined by the fact that the connecting lines between the axes of the blanket cylinders 17 to 20 and the adjacent pressure cylinders 21 to 23 form a dashed zigzag line C whose connecting lines each meet an angle Include a of 145 °.
  • This angle a can be selected in a range from 70 ° to 175 °. The smaller the angle a, the shorter the overall length of the machine.
  • the distance between the plate cylinders, inking and dampening units of two adjacent printing units is reduced, so that access to these parts becomes more difficult. Accordingly, the accessibility to the printing units can be improved at the expense of the overall length of the machine by increasing the angle a.
  • the accessibility to the inking and dampening units and the plate cylinders on the one hand and the overall length of the machine on the other hand is determined by the size of the diameter of the plate cylinder, blanket cylinder and impression cylinder. Basically, it is possible to design the three cylinders of each printing unit the same size and to choose the diameter of the plate cylinder so that a plate is on its circumference can be excited. This configuration is primarily suitable for small, narrow machines.
  • One solution that compensates for the contradicting demands for a short overall length and good accessibility is the configuration shown in FIG. 1, in which the diameters of the rubber cylinders 17 to 20 and the pressure cylinders 21 to 23 are selected to be twice as large as the diameters of the plate cylinders 13 to 16.
  • the diameters of the rubber cylinders 17 to 20 and the pressure cylinders 21 to 23 are selected to be twice as large as the diameters of the plate cylinders 13 to 16.
  • the sheets are fed to the printing presses 1 to 4 via a feed table 28 and a pre-gripper 29. So that the sheet between the point at which the rubber cylinder 17 takes over the sheets from the pre-gripper 29 and the pressure line between the rubber cylinder 17 and the pressure cylinder 21 does not smear by loosely abutting the rubber cylinder 17, a pressure roller 30 can be set on this cylinder.
  • the pressure roller 30 is arranged in the direction of rotation indicated by the arrow a of the blanket cylinder 17 directly behind the sheet transfer point. With the pressure roller 30, the sheet is pressed against the rubber cylinder 17 so that it lies smoothly against the circumference of the ink-bearing rubber cylinder 17 up to the printing line.
  • the sheet is then guided by the grippers of the impression cylinder 21, the blanket cylinder 18, the impression cylinder 22, the blanket cylinder 19 and the impression cylinder 23 to the blanket cylinder 20.
  • This rubber cylinder of the last printing unit 4 itself does not carry any grippers. Rather, sprockets around which a gripper chain system 31 is guided are fixed on both sides of the rubber cylinder 20 on its axis.
  • This gripper chain system 31 takes over the sheets from the impression cylinder 23 and transports them in the direction of arrow b to the delivery. The selected arrangement ensures that the sheets are freely guided after removal from the rubber cylinder 20 on the underside of the gripper chain system 31 and cannot strike against other parts of the machine.
  • a counter-pressure unit 32 is arranged below the abutting edge between the face printing units 3 and 4.
  • This includes a plate cylinder 33, an inking unit 34 and a dampening unit 35.
  • the plate cylinder 33 is in contact with the printing cylinder 23, which is covered with a rubber blanket and used as a rubber cylinder.
  • each continuous sheet receives along the printing line between the rubber cylinder 19 and the Printing cylinder 23 not only a face print with the color of the face printing unit 3, but also an impression at the same time.
  • the machine rests on stands 36, 37 which support the machine in the areas in which further back pressure units could be inserted.
  • An end stand 38 is also provided.
  • the embodiment according to FIG. 2 again comprises four face-printing units 51, 52, 53, 54 designed as structural units, which are designed in the same way as the face-printing units of the machine according to FIG. 1.
  • Four counter-pressure units 55, 56, 57, 58 are provided below the face-to-face printing units. which are designed in exactly the same way as the counterpressure unit 32 according to FIG. 1.
  • printing cylinders 63, 64, 65, 66 act together, all of which are covered with a rubber blanket and act as a rubber cylinder Back printing units are used. All cylinders 59 to 66 carry grippers.
  • a suction air device 69 is provided in this machine, which consists of several, over the Entire length of the rubber cylinder 59 extending suction air boxes connected to a suction air source. This ensures that the gripper of the rubber cylinder 59 to the printing cylinder 63 transported sheet abuts the suction boxes of the suction air device 69 and thus can not strike the surface of the ink-guiding rubber cylinder 59 before it reaches the printing line.
  • a blower air nozzle row 73 can also be arranged above the gripper 68, from which blown air emerges approximately tangentially to the rubber cylinder 59.
  • the printing cylinder 66 used as a blanket cylinder must be inserted into the last printing unit 54.
  • This cylinder interacts with a gripper chain system 70 which is guided around two deflection sprockets 71 seated on a common axis.
  • the deflection sprockets 71 are accommodated in an additional unit 72 comprising side walls in such a way that, after connecting this additional unit, the gripper chain system removes the sheets one after the other from the grippers of the pressure cylinder 66, which rotates in the direction of arrow c.
  • This arrangement ensures that the sheets are in turn transported away from the lower run of the gripper chain system 70 in the direction of arrow d to the delivery.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung geht aus von einer Offset-Bogen-Rotationsdruckmaschine mit mehreren, mindestens je einen Druckzylinder, einen Gummizylinder, einen Plattenzylinder sowie ein Farbwerk und ein Feuchtwerk umfassenden, untereinander gleich und je als Baueinheit ausgebildeten Druckwerken, bei der die Achsen der Gummizylinder in einer Ebene und die Achsen der Druckzylinder in einer dazu parallelen weiteren Ebene angeordnet sind.The invention is based on an offset sheet-fed rotary printing press with a plurality of printing units comprising at least one printing cylinder, a blanket cylinder, a plate cylinder and an inking unit and a dampening unit, which are identical to one another and each as a unit, in which the axes of the blanket cylinders are in one plane and the axes of the printing cylinders are arranged in a further plane parallel to this.

Bekannte Maschinen dieser Gattung mit Drei-Zylinder-Druckwerken sind so ausgebildet, daß der Bogentransport zwischen zwei Druckwerken mittels einer oder mehrerer Übergabetrommeln oder eines Greiferkettensystemes erfolgt, vgl. Walenski « Einführung in den Offsetdruck •, Seiten 48 und 49, und CH-A-583 096. In gleicher Weise können Vier-Zylinder-Druckwerke miteinander verbunden werden, bei denen jeder der beiden Gummizylinder gleichzeitig die Funktion des Druckzylinders für den anderen Gummizylinder übernimmt und die infolgedessen gleichzeitig einen Schöndruck und einen Widerdruck liefern, vgl. DE-PS-960994. Bei den bekannten Systemen zum Bogentransport befinden sich also zwischen den Druckwerken zusätzliche Bauteile, die den Bauaufwand erhöhen.Known machines of this type with three-cylinder printing units are designed so that the sheet is transported between two printing units by means of one or more transfer drums or a gripper chain system, cf. Walenski «Introduction to offset printing •, pages 48 and 49, and CH-A-583 096. Four-cylinder printing units can be connected in the same way, in which each of the two blanket cylinders simultaneously takes over the function of the impression cylinder for the other blanket cylinder and which consequently deliver a straight print and a reverse print at the same time, cf. DE-PS-960994. In the known systems for sheet transport, additional components are located between the printing units, which increase the construction effort.

Der Erfindung liegt die Aufgabe zugrunde, eine Offset-Bogen-Rotationsdruckmaschine der eingangs genannten Gattung zu schaffen, bei der Herstellungsaufwand durch Verringerung der Zahl der zum Bogentransport benötigten Teile vermindert ist.The invention has for its object to provide an offset sheet-fed rotary printing press of the type mentioned, in which manufacturing costs are reduced by reducing the number of parts required for sheet transport.

Erfindungsgemäß wird dies durch Anwendung der im Anspruch 1 angegebenen Merkmale erreicht.According to the invention this is achieved by applying the features specified in claim 1.

Durch Anwendung der Erfindung wird nicht nur der erforderliche Aufwand an Teilen verringert, sondern auch eine Verkürzung der Baulänge der Maschine erreicht. Dennoch bleibt eine Ausbaubarkeit auf beliebig viele im Schöndruck aufzubringende Farben voll erhalten. Darüber hinaus bietet die erfindungsgemäße Konfiguration den weiteren wesentlichen Vorteil, daß in sehr einfacher Weise -wiederum mit einem Minimum an Teilen - einer oder mehreren Schöndruck-Baueinheiten Widerdruck-Baueinheiten zugeordnet werden können.By using the invention, not only is the required outlay on parts reduced, but the overall length of the machine is also shortened. Nevertheless, it can be expanded to any number of colors to be applied in face printing. In addition, the configuration according to the invention offers the further significant advantage that, in turn in a very simple manner — again with a minimum of parts — one or more face-printing units can be assigned to back-pressure units.

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

  • Figur 1 eine Offset-Bogen-Rotationsdruckmaschine zur Durchführung eines Vierfarben-Schöndruckes und Einfarben-Widerdruckes und
  • Figur 2 eine Offset-Bogen-Rotationsdruckmaschine zur Durchführung eines Vierfarben-Schöndruckes und Vierfarben-Widerdruckes jeweils in einer schematischen Seitenansicht.
Further features and advantages of the invention emerge from the subclaims and the following description of two exemplary embodiments with reference to the drawing. This shows:
  • 1 shows an offset sheet-fed rotary printing machine for performing a four-color straight printing and single-color reverse printing and
  • Figure 2 shows an offset sheet-fed rotary printing press for performing a four-color face printing and four-color reverse printing, each in a schematic side view.

Die Druckmaschine nach Fig. 1 umfaßt vier als Baueinheiten ausgebildete Schöndruckwerke 1 bis 4. Jedes der Schöndruckwerke umfaßt ein Farbwerk 5, 6, 7, 8, ein Feuchtwerk 9, 10, 11, 12, einen Plattenzylinder 13, 14, 15, 16 und einen Gummizylinder 17, 18, 19, 20. Weiterhin umfassen die Schöndruckwerke 1 bis 3 je einen Druckzylinder 21, 22, 23. In das Schöndruckwerk 4 ist kein derartiger Druckzylinder mehr eingesetzt, da er zum Druck nicht benötigt wird. Alle Schöndruckwerke 1 bis 4 sind jedoch sonst gleich ausgebildet und weisen insbesondere gleichartige Seitenwände 24, 25, 26, 27 auf, die, in Fig. 1 dargestellt, unmittelbar miteinander verbunden werden können. Die Gummizylinder 17 bis 19 und die Druckzylinder 21 bis 23 sind mit Greifern zum Transport der Bogen ausgestattet. Außerdem ist zumindest der Druckzylinder 23 mit einer Vorrichtung zum Aufspannen eines Gummituches versehen.The printing machine according to FIG. 1 comprises four sheet-fed printing units 1 to 4 designed as structural units. Each of the sheet-fed printing units comprises an inking unit 5, 6, 7, 8, a dampening unit 9, 10, 11, 12, a plate cylinder 13, 14, 15, 16 and a blanket cylinder 17, 18, 19, 20. Furthermore, the face printing units 1 to 3 each comprise a printing cylinder 21, 22, 23. No such printing cylinder is inserted in the front printing unit 4, since it is not required for printing. However, all face-to-face printing units 1 to 4 are otherwise identical and in particular have side walls 24, 25, 26, 27 of the same type which, as shown in FIG. 1, can be connected directly to one another. The rubber cylinders 17 to 19 and the impression cylinders 21 to 23 are equipped with grippers for transporting the sheets. In addition, at least the printing cylinder 23 is provided with a device for stretching a rubber blanket.

Beim dargestellten Ausführungsbeispiel sind die Durchmesser der Gummizylinder 17 bis 20 und die Durchmesser der Druckzylinder 21 bis 23 untereinander gleich und doppelt so groß wie die Durchmesser der Plattenzylinder 13 bis 16 ausgeführt. Die Lagerungen für die Zylinder 17 bis 23 sind so angeordnet, daß die Achsen der Gummizylinder 17 bis 20 in einer ersten, strichpunktiert dargestellten Ebene A-A und die Achsen der Druckzylinder 21 bis 23 in einer zweiten, ebenfalls strichpunktiert dargestellten Ebene B-B liegen. Die Ebenen A-A und B-B verlaufen zweckmäßig waagerecht, so daß die Bogen in der üblichen Weise von einem vor der Frontseite der Maschine angeordneten Ausleger zu einem hinter der Rückseite angeordneten Ausleger gefördert werden. Der Abstand zwischen den beiden Ebenen A und B ist dabei dadurch bestimmt, daß die Verbindungslinien zwischen den Achsen der Gummizylinder 17 bis 20 und der jeweils anliegenden Druckzylinder 21 bis 23 einen gestrichelt dargestellten zickzack-förmigen Linienzug C bilden, dessen sich treffende Verbindungslinien jeweils einen Winkel a von 145° einschließen. Dieser Winkel a kann in einem Bereich von 70° bis 175° gewählt werden. Je kleiner der Winkel a bemessen ist, desto kürzer wird die Baulänge der Maschine. Gleichzeitig verringert sich jedoch der Abstand zwischen den Plattenzylindern, Farb-und Feuchtwerken zweier benachbarter Druckwerke, so daß der Zugang zu diesen Teilen schwieriger wird. Dementsprechend kann die Zugänglichkeit zu den Druckwerken auf Kosten der Baulänge der Maschine durch Vergrößern des Winkels a verbessert werden. Die Zugänglichkeit zu den Farb- und Feuchtwerken und den Plattenzylindern einerseits und die Baulänge der Maschine andererseits wird außerdem durch die Größe der Durchmesser der Plattenzylinder, Gummizylinder und Druckzylinder bestimmt. Grundsätzlich ist es möglich, die drei Zylinder jedes Druckwerkes gleich groß auszulegen und den Durchmesser des Plattenzylinders so zu wählen, daß an seinem Umfang eine Platte gespannt werden kann. Diese Konfiguration kommt in erster Linie für kleinformartige, schmale Maschinen in Frage. Eine die sich widersprechenden Forderungen nach kurzer Baulänge und guter Zugänglichkeit gut ausgleichende Lösung stellt die in Fig. 1 dargestellte Konfiguration dar, bei der die Durchmesser der Gummizylinder 17 bis 20 und der Druckzylinder 21 bis 23 doppelt so groß gewählt sind wie die Durchmesser der Plattenzylinder 13 bis 16. Selbstverständlich besteht auch die Möglichkeit, nur entweder die Gummizylinder oder die Druckzylinder so auszuführen, daß ihr Durchmesser ein ganzzahliges Mehrfaches des Durchmessers des Plattenzylinders und des dritten Zylinders ist.In the illustrated embodiment, the diameters of the blanket cylinders 17 to 20 and the diameters of the impression cylinders 21 to 23 are identical to one another and twice as large as the diameters of the plate cylinders 13 to 16. The bearings for the cylinders 17 to 23 are arranged so that the axes of the rubber cylinders 17 to 20 lie in a first plane AA shown in broken lines and the axes of the pressure cylinders 21 to 23 in a second plane BB also shown in broken lines. The planes AA and BB expediently run horizontally, so that the sheets are conveyed in the usual manner from a boom arranged in front of the front of the machine to a boom arranged behind the rear. The distance between the two planes A and B is determined by the fact that the connecting lines between the axes of the blanket cylinders 17 to 20 and the adjacent pressure cylinders 21 to 23 form a dashed zigzag line C whose connecting lines each meet an angle Include a of 145 °. This angle a can be selected in a range from 70 ° to 175 °. The smaller the angle a, the shorter the overall length of the machine. At the same time, however, the distance between the plate cylinders, inking and dampening units of two adjacent printing units is reduced, so that access to these parts becomes more difficult. Accordingly, the accessibility to the printing units can be improved at the expense of the overall length of the machine by increasing the angle a. The accessibility to the inking and dampening units and the plate cylinders on the one hand and the overall length of the machine on the other hand is determined by the size of the diameter of the plate cylinder, blanket cylinder and impression cylinder. Basically, it is possible to design the three cylinders of each printing unit the same size and to choose the diameter of the plate cylinder so that a plate is on its circumference can be excited. This configuration is primarily suitable for small, narrow machines. One solution that compensates for the contradicting demands for a short overall length and good accessibility is the configuration shown in FIG. 1, in which the diameters of the rubber cylinders 17 to 20 and the pressure cylinders 21 to 23 are selected to be twice as large as the diameters of the plate cylinders 13 to 16. Of course, there is also the possibility of designing only either the rubber cylinders or the impression cylinders so that their diameter is an integral multiple of the diameter of the plate cylinder and the third cylinder.

Beim dargestellten Ausführungsbeispiel werden den Schöndruckwerken 1 bis 4 die Bogen über einen Anlagetisch 28 und einen Vorgreifer 29 zugeführt. Damit die Bogen zwischen der Stelle, an der der Gummizylinder 17 die Bogen von dem Vorgreifer 29 übernimmt, und der Drucklinie zwischen dem Gummizylinder 17 und dem Druckzylinder 21 nicht durch lose Anlage am Gummizylinder 17 verschmiert, ist an diesen Zylinder eine Andruckwalze 30 anstellbar. Die Andruckwalze 30 ist dabei in der mit dem Pfeil a bezeichneten Drehrichtung des Gummizylinders 17 unmittelbar hinter der Bogenübergabestelle angeordnet. Mit der Andruckwalze 30 wird der Bogen gegen den Gummizylinder 17 gedrückt, so daß er bis zur Drucklinie glatt am Umfang des Farbe tragenden Gummizylinders 17 anliegt.In the exemplary embodiment shown, the sheets are fed to the printing presses 1 to 4 via a feed table 28 and a pre-gripper 29. So that the sheet between the point at which the rubber cylinder 17 takes over the sheets from the pre-gripper 29 and the pressure line between the rubber cylinder 17 and the pressure cylinder 21 does not smear by loosely abutting the rubber cylinder 17, a pressure roller 30 can be set on this cylinder. The pressure roller 30 is arranged in the direction of rotation indicated by the arrow a of the blanket cylinder 17 directly behind the sheet transfer point. With the pressure roller 30, the sheet is pressed against the rubber cylinder 17 so that it lies smoothly against the circumference of the ink-bearing rubber cylinder 17 up to the printing line.

Der Bogen wird anschließend von den Greifern des Druckzylinders 21, des Gummizylinders 18, des Druckzylinders 22, des Gummizylinders 19 und des Druckzylinders 23 zum Gummizylinder 20 geführt. Dieser Gummizylinder des letzten Schöndruckwerkes 4 trägt selbst keine Greifer. Vielmehr sind beiderseits des Gummizylinders 20 auf seiner Achse fest Kettenräder aufgesetzt, um die ein Greiferkettensystem 31 geführt ist. Dieses Greiferkettensystem 31 übernimmt die Bogen vom Druckzylinder 23 und transportiert sie in Richtung des Pfeiles b zur Auslage. Durch die gewählte Anordnung ist sichergestellt, daß die Bogen nach Abnahme vom Gummizylinder 20 an der Unterseite des Greiferkettensystemes 31 frei geführt sind und nicht gegen andere Teile der Maschine anschlagen können.The sheet is then guided by the grippers of the impression cylinder 21, the blanket cylinder 18, the impression cylinder 22, the blanket cylinder 19 and the impression cylinder 23 to the blanket cylinder 20. This rubber cylinder of the last printing unit 4 itself does not carry any grippers. Rather, sprockets around which a gripper chain system 31 is guided are fixed on both sides of the rubber cylinder 20 on its axis. This gripper chain system 31 takes over the sheets from the impression cylinder 23 and transports them in the direction of arrow b to the delivery. The selected arrangement ensures that the sheets are freely guided after removal from the rubber cylinder 20 on the underside of the gripper chain system 31 and cannot strike against other parts of the machine.

Die vorstehend beschriebene Anordnung stellt eine Vierfarben-Schöndruckmaschine dar, die selbständig zum Einsatz kommen kann. In Fig. 1 ist die Maschine jedoch in einer Ausbaustufe für Vierfarben-Schöndruck und Einfarben-Widerdruck dargestellt. Hierzu ist unterhalb der Stoßkante zwischen den Schöndruckwerken 3 und 4 eine Widerdruckbaueinheit 32 angeordnet. Diese umfaßt einen Plattenzylinder 33, ein Farbwerk 34 und ein Feuchtwerk 35. Der Plattenzylinder 33 steht in Berührung mit dem mit einem Gummituch bespannten und als Gummizylinder verwendeten Druckzylinder 23. Bei dieser Anordnung erhält also jeder durchlaufende Bogen entlang der Drucklinie zwischen dem Gummizylinder 19 und dem Druckzylinder 23 nicht nur einen Schöndruck mit der Farbe des Schöndruckwerkes 3, sondern gleichzeitig auch einen Widerdruck. Außer auf der Widerdruckbaueinheit 32 ruht die Maschine auf Ständern 36, 37, die die Maschine in den Bereichen unterstützen, in denen weitere Widerdruckbaueinheiten einfügbar wären. Außerdem ist ein Endständer 38 vorgesehen.The arrangement described above represents a four-color straight printing machine that can be used independently. In Fig. 1, however, the machine is shown in an expansion stage for four-color face printing and single-color reverse printing. For this purpose, a counter-pressure unit 32 is arranged below the abutting edge between the face printing units 3 and 4. This includes a plate cylinder 33, an inking unit 34 and a dampening unit 35. The plate cylinder 33 is in contact with the printing cylinder 23, which is covered with a rubber blanket and used as a rubber cylinder. In this arrangement, each continuous sheet receives along the printing line between the rubber cylinder 19 and the Printing cylinder 23 not only a face print with the color of the face printing unit 3, but also an impression at the same time. In addition to the back pressure unit 32, the machine rests on stands 36, 37 which support the machine in the areas in which further back pressure units could be inserted. An end stand 38 is also provided.

Das Ausführungsbeispiel gemäß Fig. 2 umfaßt wiederum vier als Baueinheiten ausgebildete Schöndruckwerke 51, 52, 53, 54, die ebenso ausgebildet sind wie die Schöndruckwerke der Maschine nach Fig. 1. Unterhalb der Schöndruckwerke sind vier Widerdruckbaueinheiten 55, 56, 57, 58 vorgesehen, die genauso ausgebildet sind wie die Widerdruckbaueinheit 32 gemäß Fig. 1. Mit den Gummizylindern 59, 60, 61, 62 der Schöndruckwerke 51 bis 54 wirken Druckzylinder 63, 64, 65, 66 zusammen, die sämtlich mit einem Gummituch bespannt sind und als Gummizylinder der Widerdruckwerke Verwendung finden. Alle Zylinder 59 bis 66 tragen Greifer.The embodiment according to FIG. 2 again comprises four face-printing units 51, 52, 53, 54 designed as structural units, which are designed in the same way as the face-printing units of the machine according to FIG. 1. Four counter-pressure units 55, 56, 57, 58 are provided below the face-to-face printing units. which are designed in exactly the same way as the counterpressure unit 32 according to FIG. 1. With the rubber cylinders 59, 60, 61, 62 of the printing printing units 51 to 54, printing cylinders 63, 64, 65, 66 act together, all of which are covered with a rubber blanket and act as a rubber cylinder Back printing units are used. All cylinders 59 to 66 carry grippers.

Die Zufuhr der Bogen erfolgt über einen Anlagetisch 67 und einen Vorgreifer 68. Zur abschmierfreien Führung des von den Greifern des Gummizylinders 59 erfaßten Bogens zur Drucklinie zwischen den Zylindern 59 und 63 ist bei dieser Maschine eine Sauglufteinrichtung 69 vorgesehen, die aus mehreren, sich über die gesamte Länge des Gummizylinders 59 erstreckenden, an eine Saugluftquelle angeschlossenen Saugluftkästen besteht. Hierdurch wird sichergestellt, daß der Greifer des Gummizylinders 59 zum Druckzylinder 63 transportierte Bogen in Anlage an den Saugkästen der Sauglufteinrichtung 69 läuft und somit nicht gegen die Oberfläche des farbführenden Gummizylinders 59 anschlagen kann, bevor er die Drucklinie erreicht. Um zusätzlich ein Luftpolster zwischen dem Bogen und dem Gummizylinder 59 aufzubauen, kann oberhalb des Vorgreifers 68 noch eine Blasluftdüsenreihe 73 angeordnet sein, aus der Blasluft etwa tangential zu dem Gummizylinder 59 austritt.The sheet is fed via a system table 67 and a pre-gripper 68. For smear-free guidance of the sheet gripped by the grippers of the rubber cylinder 59 to the pressure line between the cylinders 59 and 63, a suction air device 69 is provided in this machine, which consists of several, over the Entire length of the rubber cylinder 59 extending suction air boxes connected to a suction air source. This ensures that the gripper of the rubber cylinder 59 to the printing cylinder 63 transported sheet abuts the suction boxes of the suction air device 69 and thus can not strike the surface of the ink-guiding rubber cylinder 59 before it reaches the printing line. In order to additionally build up an air cushion between the sheet and the rubber cylinder 59, a blower air nozzle row 73 can also be arranged above the gripper 68, from which blown air emerges approximately tangentially to the rubber cylinder 59.

Bei der in Fig. 2 gezeigten Konfiguration, bei der das letzte Druckwerk ein Widerdruckwerk ist, muß in das letzte Schöndruckwerk 54 der als Gummizylinder verwendete Druckzylinder 66 eingesetzt sein. Dieser Zylinder wirkt mit einem Greiferkettensystem 70 zusammen, das um zwei auf einer gemeinsamen Achse sitzende Umlenkkettenräder 71 geführt ist. Die Umlenkkettenräder 71 sind in einer Seitenwände umfassenden Zusatzbaueinheit 72 derart untergebracht, daß nach Anschluß dieser Zusatzbaueinheit das Greiferkettensystem die Bogen nacheinander von den Greifern des Druckzylinders 66 abnimmt, der in Richtung des Pfeiles c umläuft. Durch diese Anordnung wird sichergestellt, daß die Bogen wiederum vom unteren Trum des Greiferkettensystemes 70 in Richtung des Pfeiles d zur Auslage abtransportiert werden.In the configuration shown in FIG. 2, in which the last printing unit is an impression printing unit, the printing cylinder 66 used as a blanket cylinder must be inserted into the last printing unit 54. This cylinder interacts with a gripper chain system 70 which is guided around two deflection sprockets 71 seated on a common axis. The deflection sprockets 71 are accommodated in an additional unit 72 comprising side walls in such a way that, after connecting this additional unit, the gripper chain system removes the sheets one after the other from the grippers of the pressure cylinder 66, which rotates in the direction of arrow c. This arrangement ensures that the sheets are in turn transported away from the lower run of the gripper chain system 70 in the direction of arrow d to the delivery.

Aus der vorstehenden Beschreibung ergibt sich, daß die Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt ist. Vielmehr können beliebige Zahlen von Schöndruckwerken zu einer Mehrfarbenschöndruckmaschine zusammengefügt werden. Eine derartige Maschine kann weiterhin mit den Widerdruckbaueinheiten so weit ausgebaut werden, daß die gleiche Zahl von Farben, die im Schöndruck aufgebracht werden kann, auch zusätzlich im Widerdruck aufgetragen werden kann.It follows from the above description that the invention is not restricted to the exemplary embodiments shown. Much more Any number of straight printing units can be combined to form a multi-color straight printing machine. Such a machine can also be expanded with the counter-printing units to such an extent that the same number of colors that can be applied in face printing can also be applied in reverse printing.

Claims (13)

1. Sheet fed offset rotary printing machine with several printing units each constructed as a modular unit and each the same, and each comprising at least a printing cylinder, a blanket cylinder, a plate cylinder and an inking - and damping-unit, with which the axes of the blanket cylinders are arranged in one plane, and the axes of the printing cylinders in a further plane parallel to it, characterised in that the blanket cylinders (17 to 19 ; 59 to 62) and the printing cylinders (21 to 23 ; 63 to 66) are arranged in series touching each other, whereby alternately a printing cylinder of one printing unit module abuts the blanket cylinder of the adjacent module, the connecting lines between the axes of the blanket cylinders and the printing cylinders form a zig zag line (C), the connecting lines are arranged to be inclined with respect to one another at an angle (a) of 70 to 175° and the blanket cylinders and the printing cylinders are provided with grippers.
2. Sheet fed offset rotary printing machine according to claim 1, characterised in that the connecting lines are inclined with respect to one another at an angle (a) of 100° to 150°.
3. Sheet fed offset rotary printing machine according to claim 1 or 2, characterised in that the series of blanket cylinders (17 to 19 ; 59 to 62) and printing cylinders (21 to 23; 63 to 66) is arranged to run horizontally.
4. Sheet fed offset rotary printing machine according to one of the preceding claims, characterised in that the diameters of the printing cylinders (21 to 23 ; 63 to 66) are a whole number multiple, preferably double, of the diameters of the plate cylinders (13 to 16).
5. Sheet fed offset rotary printing machine according to one of claims 1 to 3, characterised in that the diameters of the blanket cylinders (17 to 19 ; 59 to 62) are a whole number multiple, preferably double, of the diameters of the plate cylinders (13 to 16).
6. Sheet fed offset rotary printing machine according to claims 4 and 5, characterised in that the diameters of the blanket cylinders (17 to 19 ; 59 to 62) and of the printing cylinders (21 to 23 ; 63 to 66) are the same size.
7. Sheet fed offset rotary printing machine according to one of the preceding claims, characterised in that at least one printing cylinder (23 ; 63 to 66) is used as a blanket cylinder of a perfecting unit, the plate cylinder (33), inking unit (34) and damping unit (35) of which are also combined to form a modular unit (32 ; 55 to 58).
8. Sheet fed offset rotary printing machine according to claim 7, characterised in that the first forme unit-modules (1 to 3 ; 51 to 54) are optionally arranged on perfecting-modules (32 ; 55 to 58) and/or stands (36 to 38).
9. Sheet fed offset rotary printing machine according to one of the preceding claims, characterised in that a first forme unit (4) without printing cylinders is attached as the last printing unit to the series of identical printing unit modules (1-3), and in that on the shaft of the blanket cylinder (20) of this printing unit there are placed chain wheels for a gripper chain system (31) transporting the sheets for delivery. (Fig. 1).
10. Sheet fed offset rotary printing machine according to claim 7 or 8, characterised in that when using a perfecting unit (58) as the last printing unit in the series of identical printing unit modules, guide wheels (71) for a chain gripper system (70) transporting the sheets for delivery are associated with the blanket cylinder (66) of this printing unit. (Fig. 2).
11. Sheet fed offset rotary printing machine according to one of the preceding claims, characterised in that the sheets can be conveyed to the first blanket cylinder (17 ; 59) by means of an auxiliary gripper (29 ; 68).
12. Sheet fed offset rotary printing machine according to claim 11, characterised in that a feed roll (30) can be adjusted onto the blanket cylinder (17) of the first printing unit (1) in the direction of rotation directly behind the sheet take-over point. (Fig. 1).
13. Sheet fed offset rotary printing machine according to claim 11, characterised in that along the path of the sheets between the sheet transfer point and the first printing cylinder (63) there is arranged a suction air device (69) holding the sheets at a distance from the surface of the first blanket cylinder (59). (Fig. 2).
EP82109662A 1982-02-05 1982-10-20 Rotary machine for offset printing on sheets Expired EP0085751B1 (en)

Applications Claiming Priority (2)

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DE3203879 1982-02-05
DE3203879A DE3203879C2 (en) 1982-02-05 1982-02-05 Sheet-fed offset rotary printing press

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EP0085751A1 EP0085751A1 (en) 1983-08-17
EP0085751B1 true EP0085751B1 (en) 1985-03-13

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EP82109662A Expired EP0085751B1 (en) 1982-02-05 1982-10-20 Rotary machine for offset printing on sheets

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US (1) US4493255A (en)
EP (1) EP0085751B1 (en)
JP (1) JPS58147364A (en)
CA (1) CA1200429A (en)
DE (2) DE3203879C2 (en)

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Also Published As

Publication number Publication date
DE3203879C2 (en) 1984-10-31
CA1200429A (en) 1986-02-11
US4493255A (en) 1985-01-15
EP0085751A1 (en) 1983-08-17
JPS58147364A (en) 1983-09-02
DE3262567D1 (en) 1985-04-18
DE3203879A1 (en) 1983-08-18

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