EP0683041A1 - Printing unit for blanket-to-blanket printing - Google Patents

Printing unit for blanket-to-blanket printing Download PDF

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Publication number
EP0683041A1
EP0683041A1 EP95106526A EP95106526A EP0683041A1 EP 0683041 A1 EP0683041 A1 EP 0683041A1 EP 95106526 A EP95106526 A EP 95106526A EP 95106526 A EP95106526 A EP 95106526A EP 0683041 A1 EP0683041 A1 EP 0683041A1
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EP
European Patent Office
Prior art keywords
printing
printing unit
blanket
cylinders
transfer
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.)
Granted
Application number
EP95106526A
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German (de)
French (fr)
Other versions
EP0683041B1 (en
Inventor
Erich Wech
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
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MAN Roland Druckmaschinen AG
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Publication date
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0683041A1 publication Critical patent/EP0683041A1/en
Application granted granted Critical
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Classifications

    • 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
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines

Definitions

  • the invention relates to a printing machine for rubber-rubber printing with a horizontal web run according to the preamble of claim 1.
  • DE 27 54 429 C2 shows a printing unit for rubber-rubber printing with a horizontal web run. Then two printing units, each with a plate and a transfer cylinder, are arranged one above the other. The horizontally running web to be printed is passed between the transfer cylinder. The plane containing the axes of the transfer cylinders is inclined to the vertical by a larger angular amount, approximately 30 °. As a result, the web is wrapped around the transfer cylinder. This is necessary because the transfer cylinders have clamping channels. In the case of an arrangement of such cylinders vertically one above the other, the pressure on the web and thus the web tension and positive web travel exerted by the printing unit would be interrupted when the tensioning channels pass through the pressure zone.
  • the inclination of the transfer cylinders shown in the cited publication has the disadvantage in terms of printing technology that the peripheral speed of the transfer cylinders in the looping area is greater than the web speed and this results in displacements between the web and transfer cylinders which adversely affect the print quality.
  • the greater peripheral speed stems from the larger radius of these cylinders compared to the radius that arises in the pressure zone.
  • the invention has for its object to achieve good print quality in a generic printing unit with a favorable web run.
  • the invention reduces the wrap-around area of the transfer cylinders, as a result of which the displacement between web and cylinder surface is reduced and the print quality is thereby improved. From this point of view, a completely omitted loop would be optimal. However, this would have the disadvantage that after leaving the printing nip, the web sticks to the cylinder with the currently larger pressure component of the subject and flaps depending on the subject. This has an adverse effect on the web tension and the print quality (dot gain, circumferential duplex ', circumferential register error). Optimal wrapping, which meets the printing requirements and a stable web run, is therefore achieved with an inclination of the transfer cylinders in the specified angular range.
  • the printing unit shown in Fig. 1 contains two transfer cylinders 1, 2 arranged one above the other, each of which a forme cylinder 3, 4 is assigned.
  • the transfer cylinders 1, 2 work in contact with each other.
  • the angle ⁇ can be selected in the range from 0 ° to 10 °.
  • the angle ⁇ can also be clockwise to the vertical 6, that is, the transfer cylinder 1 can be arranged inclined in the web running direction.
  • the transfer cylinders 1, 2 are each equipped with an endless blanket 7.
  • Fig. 2 shows the cross section of the transfer cylinder 1.
  • the rubber blanket 7 is applied as a layer on a support in the form of a sleeve 8.
  • the rubber blanket 7 can also be glued on without a gap, and the carrier can also have a plate-like shape.
  • FIG. 3 the transfer cylinder 9 is provided with a slot 10 running in the axial direction, into which the bent legs 11, 12 of a plate-shaped carrier 13 are inserted.
  • the rubber blanket 14 is glued onto the carrier 13 without a gap.
  • a particularly advantageous development of the invention consists in the blanket sleeves 7, 8 and 13, 14 in the printing unit 1, 3 shown in FIG. 1; 2, 4 with cylinders 1, 2 left in the printing unit, to be changed from the cylinder front side, i.e. through the printing unit side wall with cylinders suspended on one side (see e.g. DE-PS 35 43 704, Figure 6).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)

Abstract

The plane of the axes of the transfer cylinders (1, 2) slopes in relation to the vertical (6) by an angle (a) of 0 to 10 deg. The top transfer cylinder (1) slopes in, or contrary to, the direction of travel. The offset blanket is applied as a layer to a support. The rubber sleeves can be changed from the cylinders' end side, when the transfer cylinders are left in the machine. <IMAGE>

Description

Die Erfindung betrifft eine Druckmaschine für Gummi-Gummi-Druck mit horzizontalen Bahnlauf nach dem Oberbegriff des Anspruchs 1.The invention relates to a printing machine for rubber-rubber printing with a horizontal web run according to the preamble of claim 1.

Eine Druckeinheit für Gummi-Gummi-Druck mit horizontalen Bahnlauf zeigt die DE 27 54 429 C2. Danach sind zwei Druckwerke mit jeweils einem Platten- und einem Übertragungszylinder übereinander angeordnet. Zwischen dem Übertragungszylinder wird die waagerecht laufende, zu bedruckende Bahn hindurchgeführt. Die die Achsen der Übertragungszylinder enthaltende Ebene ist um einen größeren Winkelbetrag, etwa 30°, zur Vertikalen geneigt. Es wird dadurch eine Umschlingung der Übertragungszylinder durch die Bahn erreicht. Dies ist erforderlich, weil die Übertragungszylinder mit Spannkanälen behaftet sind. Bei einer Anordnung derartiger Zylinder senkrecht übereinander würde beim Durchlauf der Spannkanäle durch die Druckzone die Pressung auf die Bahn und damit der durch die Druckeinheit ausgeübte Bahnzug und Bahnzwanglauf unterbrochen werden. Die in der genannten Druckschrift gezeigte Schrägstellung der Übertragungszylinder hat aber den drucktechnischen Nachteil, daß die Umfangsgeschwindigkeit der Übertragungszylinder im Umschlingungsbereich größer ist als die Bahngeschwindigkeit und sich dadurch die Druckqualität nachteilig beeinflußende Verschiebungen zwischen Bahn und Übertragungszylindern ergeben. Die größere Umfangsgeschwindigkeit rührt vom größeren Radius dieser Zylinder gegenüber dem sich in der Druckzone einstellenden Radius her.DE 27 54 429 C2 shows a printing unit for rubber-rubber printing with a horizontal web run. Then two printing units, each with a plate and a transfer cylinder, are arranged one above the other. The horizontally running web to be printed is passed between the transfer cylinder. The plane containing the axes of the transfer cylinders is inclined to the vertical by a larger angular amount, approximately 30 °. As a result, the web is wrapped around the transfer cylinder. This is necessary because the transfer cylinders have clamping channels. In the case of an arrangement of such cylinders vertically one above the other, the pressure on the web and thus the web tension and positive web travel exerted by the printing unit would be interrupted when the tensioning channels pass through the pressure zone. However, the inclination of the transfer cylinders shown in the cited publication has the disadvantage in terms of printing technology that the peripheral speed of the transfer cylinders in the looping area is greater than the web speed and this results in displacements between the web and transfer cylinders which adversely affect the print quality. The greater peripheral speed stems from the larger radius of these cylinders compared to the radius that arises in the pressure zone.

Der Erfindung liegt die Aufgabe zugrunde, bei einer gattungsgemäßen Druckeinheit mit einem günstigen Bahnlauf eine gute Druckqualität zu erzielen.The invention has for its object to achieve good print quality in a generic printing unit with a favorable web run.

Diese Aufgabe wird erfindungsgemäß durch die gegenständlichen Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Die Erfindung verkleinert den Umschlingungsbereich der Übertragungszylinder, wodurch die Verschiebung zwischen Bahn und Zylinderoberfläche verringert und dadurch die Druckqualität verbessert wird. Optimal wäre nach diesem Gesichtspunkt eine völlig entfallende Umschlingung. Dies hätte aber den Nachteil, daß die Bahn nach dem Verlassen des Druckspaltes jeweils an dem Zylinder mit dem momentan größeren Druckanteil am Sujet kleben bleibt und also je nach Sujet flattert. Dies wirkt sich nachteilig auf die Bahnspannung und die Druckqualität (Punktzuwachs, Umfangsduple', Umfangsregisterfehler) aus. Eine optimale Umschlingung, die den drucktechnischen Belangen und einem stabilen Bahnlauf gerecht wird, wird also bei einer Neigung der Übertragungszylinder im angegebenen Winkelbereich erzielt.This object is achieved according to the invention by the objective features of the characterizing part of claim 1. The invention reduces the wrap-around area of the transfer cylinders, as a result of which the displacement between web and cylinder surface is reduced and the print quality is thereby improved. From this point of view, a completely omitted loop would be optimal. However, this would have the disadvantage that after leaving the printing nip, the web sticks to the cylinder with the currently larger pressure component of the subject and flaps depending on the subject. This has an adverse effect on the web tension and the print quality (dot gain, circumferential duplex ', circumferential register error). Optimal wrapping, which meets the printing requirements and a stable web run, is therefore achieved with an inclination of the transfer cylinders in the specified angular range.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen in Verbindung mit der Beschreibung.Advantageous developments of the invention result from the subclaims in connection with the description.

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In den zugehörigen Zeichnungen zeigt schematisch:

Fig. 1
eine Druckeinheit in der Seitenansicht,
Fig. 2
den Schnitt durch einen Übertragungszylinder der Druckeinheit,
Fig. 3
eine zu Fig. 2 analoge Variante, ausschnittsweise.
The invention will be explained in more detail below using an exemplary embodiment. The accompanying drawings show schematically:
Fig. 1
a printing unit in side view,
Fig. 2
the section through a transfer cylinder of the printing unit,
Fig. 3
a variant analogous to FIG. 2, in sections.

Die in Fig. 1 dargestellte Druckeinheit enthält zwei übereinander angeordnete Übertragungszylinder 1, 2, denen jeweils ein Formzylinder 3, 4 zugeordnet ist. Die Übertragungszylinder 1, 2 arbeiten im Berührungskontakt miteinander. Dabei ist der Berührungspunkt entgegen der Laufrichtung der Bahn 5 zur Vertikalen 6 durch die Mitte des unteren Übertragungszylinders 2 versetzt, und zwar ist die Ebene der Achsen der Übertragungszylinder 1, 2 um einen Winkel α = 5° zur Vertikalen 6 geneigt. Der Winkel α kann im Bereich von 0° bis 10° gewählt werden. Auch kann der Winkel α im Uhrzeigersinn zur Vertikalen 6 liegen, das heißt, der Übertragungszylinder 1 kann in Bahnlaufrichtung geneigt angeordnet werden.The printing unit shown in Fig. 1 contains two transfer cylinders 1, 2 arranged one above the other, each of which a forme cylinder 3, 4 is assigned. The transfer cylinders 1, 2 work in contact with each other. The point of contact is offset from the direction of travel of the web 5 to the vertical 6 through the center of the lower transfer cylinder 2, and the plane of the axes of the transfer cylinders 1, 2 is inclined by an angle α = 5 ° to the vertical 6. The angle α can be selected in the range from 0 ° to 10 °. The angle α can also be clockwise to the vertical 6, that is, the transfer cylinder 1 can be arranged inclined in the web running direction.

Die Übertragungszylinder 1, 2 sind jeweils mit einem endlosen Gummituch 7 ausgestattet. Fig. 2 zeigt den Querschnitt des Übertragungszylinders 1. Das Gummituch 7 ist als Schicht auf einem Träger in Form einer Hülse 8 aufgebracht. Das Gummituch 7 kann auch spaltlos aufgeklebt werden, und der Träger kann auch plattenförmige Gestalt haben kann. Eine solche Variante zeigt Fig. 3. Hier ist der Übertragungszylinder 9 mit einem in Achsrichtung verlaufenden Schlitz 10 versehen, in den die abgekanteten Schenkel 11, 12 eines plattenförmigen Trägers 13 eingesteckt sind. Auf den Träger 13 ist das Gummituch 14 spaltlos aufgeklebt.The transfer cylinders 1, 2 are each equipped with an endless blanket 7. Fig. 2 shows the cross section of the transfer cylinder 1. The rubber blanket 7 is applied as a layer on a support in the form of a sleeve 8. The rubber blanket 7 can also be glued on without a gap, and the carrier can also have a plate-like shape. Such a variant is shown in FIG. 3. Here, the transfer cylinder 9 is provided with a slot 10 running in the axial direction, into which the bent legs 11, 12 of a plate-shaped carrier 13 are inserted. The rubber blanket 14 is glued onto the carrier 13 without a gap.

Eine besonders vorteilhafte Weiterbildung der Erfindung besteht darin, die Gummituchhülsen 7, 8 bzw. 13, 14 in der in Fig. 1 dargestellten Druckeinheit 1, 3; 2, 4 bei in der Druckeinheit belassenen Zylindern 1, 2 von der Zylinderstirnseite her, also durch die Druckwerkseitenwand bei einseitig schwebend gehaltenen Zylinder zu wechseln (siehe hierzu z. B. DE-PS 35 43 704, Abbildung 6).A particularly advantageous development of the invention consists in the blanket sleeves 7, 8 and 13, 14 in the printing unit 1, 3 shown in FIG. 1; 2, 4 with cylinders 1, 2 left in the printing unit, to be changed from the cylinder front side, i.e. through the printing unit side wall with cylinders suspended on one side (see e.g. DE-PS 35 43 704, Figure 6).

Claims (6)

Druckeinheit für Gummi-Gummi-Druck mit horizontalen Bahnlauf mit Zwei Druckwerken, deren Übertragungszylinder übereinander angeordnet sind und wobei die Übertragungszylinder jeweils ein spaltloses Gummituch tragen, dadurch gekennzeichnet, daß die Ebene der Achsen der Übertragungszylinder (1, 2, 9) um einen Winkel (α) im Bereich von 0° bis 10° zur Vertikalen (6) geneigt ist.Printing unit for rubber-rubber printing with horizontal web running with two printing units, the transfer cylinders of which are arranged one above the other and the transfer cylinders each carry a gapless rubber blanket, characterized in that the plane of the axes of the transfer cylinders (1, 2, 9) by an angle ( α) is inclined in the range from 0 ° to 10 ° to the vertical (6). Druckeinheit nach Anspruch 1, dadurch gekennzeichnet, daß der obere Übertragungszylinder (1) in Bahnlaufrichtung geneigt angeordnet ist.Printing unit according to claim 1, characterized in that the upper transfer cylinder (1) is arranged inclined in the web running direction. Druckeinheit nach Anspruch 1, dadurch gekennzeichnet, daß der obere Übertraungszylinder (1) entgegen der Bahnlaufrichtung geneigt angeordnet ist.Printing unit according to claim 1, characterized in that the upper transfer cylinder (1) is arranged inclined against the web running direction. Druckeinheit nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Gummituch (7) als Schicht auf einen Träger (8) aufgebracht ist.Printing unit according to one of claims 1 to 3, characterized in that the rubber blanket (7) is applied as a layer to a support (8). Druckeinheit nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Gummituch (14) auf einen Träger (13) spaltlos aufgeklebt ist.Printing unit according to one of claims 1 to 3, characterized in that the rubber blanket (14) is glued onto a carrier (13) without a gap. Druckeinheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Gummihülsen (7, 8; 13, 14) bei in der Maschine belassenen Übertragungszylindern (1, 2) von der Zylinderstirnseite her wechselbar sind.Printing unit according to one of the preceding claims, characterized in that the rubber sleeves (7, 8; 13, 14) can be exchanged from the front side of the cylinder when the transfer cylinders (1, 2) are left in the machine.
EP95106526A 1994-05-04 1995-04-29 Printing unit for blanket-to-blanket printing Expired - Lifetime EP0683041B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4415711 1994-05-04
DE4415711A DE4415711A1 (en) 1994-05-04 1994-05-04 Printing unit for rubber-rubber printing

Publications (2)

Publication Number Publication Date
EP0683041A1 true EP0683041A1 (en) 1995-11-22
EP0683041B1 EP0683041B1 (en) 1998-10-21

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EP95106526A Expired - Lifetime EP0683041B1 (en) 1994-05-04 1995-04-29 Printing unit for blanket-to-blanket printing

Country Status (5)

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US (1) US5692439A (en)
EP (1) EP0683041B1 (en)
JP (1) JPH0839757A (en)
CA (1) CA2148627C (en)
DE (2) DE4415711A1 (en)

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US6050185A (en) * 1997-11-26 2000-04-18 Heidelberger Druckmaschinen Ag Printing unit for a web-fed rotary printing press
EP1970197B1 (en) * 1999-12-02 2010-11-17 Koenig & Bauer AG Printing group of a rotary printing press
US6401608B1 (en) 2000-05-05 2002-06-11 Halm Industries, Co., Inc. Printing press with perfecting station
ES2281603T3 (en) 2001-04-09 2007-10-01 KOENIG &amp; BAUER AKTIENGESELLSCHAFT PRINTING MECHANISM OF A PRINTER MACHINE.
CN100515765C (en) 2001-04-09 2009-07-22 柯尼格及包尔公开股份有限公司 Printing unit of a printing machine
CN100410073C (en) 2001-08-03 2008-08-13 柯尼格及包尔公开股份有限公司 Printing couple in printing machine
CN1781703A (en) 2001-08-03 2006-06-07 柯尼格及包尔公开股份有限公司 Printing device in printing machine
DE10307382A1 (en) * 2002-12-16 2004-07-08 Koenig & Bauer Ag Printing blanket assembly for a printed blanket cylinder of a rotary printing press comprises a dimensionally stable support plate and a printing blanket fixed to the outer side of the support plate
US20040231535A1 (en) * 2002-07-03 2004-11-25 Gerner Erich Max Karl Printing groups of a printing press
EP1767356A3 (en) * 2004-04-28 2009-12-02 Koenig &amp; Bauer Aktiengesellschaft Printing units pertaining to a multi-colour roller rotary press, and method for operating the same.
DE102004038206A1 (en) * 2004-08-05 2005-10-27 Koenig & Bauer Ag Bearing unit of a printing cylinder and printing unit

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GB843899A (en) * 1958-01-17 1960-08-10 American Type Founders Co Inc Web printing presses
US2986085A (en) * 1959-04-13 1961-05-30 Cottrell Company Printing cylinders for rotary web presses
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JPS57131561A (en) * 1981-02-09 1982-08-14 Komori Printing Mach Co Ltd Rotary printing press
EP0131813A2 (en) * 1983-07-16 1985-01-23 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Web-fed rotary offset printing machine
DE3543704A1 (en) * 1985-12-11 1987-06-19 Md Papierfabrik Pasing Nicolau DEVICE AND METHOD FOR PRINTING A TRAIN
EP0235677A2 (en) * 1986-03-06 1987-09-09 R. R. Donnelley &amp; Sons Company Printing blanket with carrier plate and method of assembly
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Also Published As

Publication number Publication date
CA2148627C (en) 1998-12-08
DE59503967D1 (en) 1998-11-26
CA2148627A1 (en) 1995-11-05
EP0683041B1 (en) 1998-10-21
US5692439A (en) 1997-12-02
JPH0839757A (en) 1996-02-13
DE4415711A1 (en) 1995-11-09

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