EP0965449A2 - Wedge ink duct - Google Patents

Wedge ink duct Download PDF

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Publication number
EP0965449A2
EP0965449A2 EP99111469A EP99111469A EP0965449A2 EP 0965449 A2 EP0965449 A2 EP 0965449A2 EP 99111469 A EP99111469 A EP 99111469A EP 99111469 A EP99111469 A EP 99111469A EP 0965449 A2 EP0965449 A2 EP 0965449A2
Authority
EP
European Patent Office
Prior art keywords
ink
ink fountain
wedge
insert
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.)
Granted
Application number
EP99111469A
Other languages
German (de)
French (fr)
Other versions
EP0965449B1 (en
EP0965449A3 (en
Inventor
Torsten Thieme
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0965449A2 publication Critical patent/EP0965449A2/en
Publication of EP0965449A3 publication Critical patent/EP0965449A3/en
Application granted granted Critical
Publication of EP0965449B1 publication Critical patent/EP0965449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention relates to a wedge ink fountain for printing machines.
  • the sheet-like ink supply of the individual printing towers is on sheetfed offset printing machines in a wedge color box that adjusts along the duct with adjustable zones Color dosing elements.
  • the dosing elements form an inlet gap to the duct through which the color task is regulated.
  • the ink fountain of the machine is used to prepare for printing filled with a color supply. As a rule, the required amount cannot be determined, so that usually a larger amount of paint is filled than required. While changing colors the washing of the inking rollers and possibly the ductor is largely automated the ink fountain is still cleaned manually. The printer is filling the remaining color from the ink fountain (EP 05 84 523 A1).
  • Box-shaped inserts for ink tanks are known for faster change of printing ink (DE 43 15 595).
  • the inserts are usually inserted or suspended in the ink fountain and held in place by their own weight.
  • the disadvantage is that ink can get under the bottom of the insert and infiltrate it during printing. The goal of reduced cleaning effort is thus questioned.
  • the application also runs the risk of being lifted by hydrodynamic forces.
  • Another shortcoming of these ink fountain inserts is the necessary game to the Duktor, which causes an undesired licking of the paint.
  • ink fountains with a reduced ink supply are also known.
  • DE 43 39 939 C2 describes a solution for creating such a minimally necessary color volume.
  • the ink is introduced under metered pressure via feed channels into the ink supply space of an element which extends along the ink fountain roller and delimits the storage space, the end face of the element being adjustable in a defined return gap distance from the inking roller.
  • a disadvantage of this solution is the large amount of fastening work that has to be carried out at higher pressures to ensure tightness and thus also makes an optional use more difficult.
  • the poorly accessible device does not offer any time advantages in the cleaning process.
  • a particular problem is the residual color in the supply lines.
  • the object of the invention is to provide an easy-to-clean ink fountain.
  • the drawing shows a wedge color box with insert.
  • a duct roller 1 is assigned a lower part 2 of a known wedge ink fountain, 2 ink metering elements 3 being arranged on the bottom part for setting a gap relative to the duct roller 1.
  • a paint box insert 4 is placed on the lower part 2 and a flat gasket 5 is arranged between the lower part 2 and the underside 7 of the paint box insert.
  • the underside 7 of the ink fountain insert 4 is detachably connected to the lower part 2 via at least one fastening screw 6.
  • a color distribution element 8 is firmly connected to the underside 7 of the ink fountain insert 4.
  • the ink distribution element 8 has an end face 9 that is operatively connected to the duct roller 1.
  • the end face 9 does not touch the duct roller 1, that is, there is a small gap and, according to a second variant (not shown), the end face 9 of the ink distributor element 8 touches , for example via a rotating element, the duct roller.
  • the front side 9 and the ink metering elements 3 enclose an ink supply space 10 in connection with the underside 7 of the ink fountain insert 4.
  • a connector 11 for the ink supply to the ink supply space 10 is arranged on the ink distribution element 8. This connection 11 can be connected to a paint cartridge or to a paint supply system via a metering and pressure switch unit.
  • Handles 12 are arranged on the ink fountain insert 4.
  • connection 11 of the ink distribution element 8 is separated from the ink supply system or from the ink cartridge, if it is not part of the ink fountain insert, the fastening screw is loosened and the ink fountain insert 4 is removed from the wedge ink fountain.
  • the removed unit can now be cleaned outside the printing press, and the ink supply space is also easily accessible.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

An ink dosing system for an offset printing press has a removable ink tray (4) positioned onto a sloping support (2) under the dosing roller (1). The tray is secured by a threaded fastener (6) and has an ink reservoir (10) formed between a control profile (9) and the dosing roller. A lip (3) at the bottom of the support controls the dosing gap while the reservoir is connected by a duct (11) to an external ink reservoir. A flat seal (5) under the tray prevents ink moving under the tray.

Description

Die Erfindung betrifft einen Keilfarbkasten für Druckmaschinen.The invention relates to a wedge ink fountain for printing machines.

Bei Bogenoffsetdruckmaschinen befindet sich der pastöse Farbvorrat der einzelnen Drucktürme in einem längs des Duktors anliegenden Keilfarbkasten mit zonenweise einstellbaren Farbdosierelementen. Die Dosierelemente bilden zum Duktor einen Einlaufspalt, durch den die Farbaufgabe reguliert wird. Bei der Vorbereitung zum Druck wird der Farbkasten der Maschine mit einem Farbvorrat befüllt. In der Regel ist die notwendige Menge nicht ermittelbar, so daß meist eine größere Farbmenge eingefüllt wird als benötigt. Während bei einem Farbwechsel das Waschen der Farbwerkswalzen und evtl. des Duktors weitestgehend automatisiert abläuft, erfolgt die Reinigung des Farbkastens immer noch manuell. Der Drucker spachtelt dabei die Restfarbe aus dem Farbkasten (EP 05 84 523 A1).The sheet-like ink supply of the individual printing towers is on sheetfed offset printing machines in a wedge color box that adjusts along the duct with adjustable zones Color dosing elements. The dosing elements form an inlet gap to the duct through which the color task is regulated. The ink fountain of the machine is used to prepare for printing filled with a color supply. As a rule, the required amount cannot be determined, so that usually a larger amount of paint is filled than required. While changing colors the washing of the inking rollers and possibly the ductor is largely automated the ink fountain is still cleaned manually. The printer is filling the remaining color from the ink fountain (EP 05 84 523 A1).

Für einen schnelleren Wechsel der Druckfarbe sind kastenförmige Einsätze für Farbkästen bekannt (DE 43 15 595). Die Einsätze werden in der Regel in den Farbkasten eingesetzt oder eingehängt und vom Eigengewicht in ihrer Position gehalten.
Nachteilig ist, daß im Druckbetrieb Farbe unter den Boden des Einsatzes gelangen und diesen unterwandern kann. Das Ziel des verringerten Reinigungsaufwandes wird so in Frage gestellt. Der Einsatz läuft außerdem Gefahr, durch hydrodynamische Kräfte ausgehoben zu werden.
Ein weiteres Manko dieser Farbkasteneinsätze ist das notwendige Spiel zum Duktor, welches ein unerwünschtes Lecken der Farbe bedingt.Box-shaped inserts for ink tanks are known for faster change of printing ink (DE 43 15 595). The inserts are usually inserted or suspended in the ink fountain and held in place by their own weight.
The disadvantage is that ink can get under the bottom of the insert and infiltrate it during printing. The goal of reduced cleaning effort is thus questioned. The application also runs the risk of being lifted by hydrodynamic forces.
Another shortcoming of these ink fountain inserts is the necessary game to the Duktor, which causes an undesired licking of the paint.

Zur Vermeidung des Reinigungsaufwandes sind auch Farbkästen mit verringertem Farbvorrat bekannt. Die DE 43 39 939 C2 beschreibt eine Lösung zur Schaffung eines solchen minimal notwendigen Farbvolumens. Hierbei wird die Farbe unter dosierbarem Druck über Zuführungskanäle in den Farbvorratsraum eines sich längs der Farbkastenwalze erstreckenden, den Vorratsraum begrenzenden Elementes eingeleitet, wobei die Stirnfläche des Elementes in einem definierten Rücklaufspaltabstand zur Farbwalze einstellbar ist.
Nachteilig an dieser Lösung ist der große Befestigungsaufwand, der zur Gewährleistung der Dichtheit bei höheren Drücken betrieben werden muß und so auch eine optionale Nutzung erschwert. Bei einem Farbwechsel bietet die schlecht zugängliche Vorrichtung keine Zeitvorteile beim Reinigungsvorgang. Ein besonderes Problem ist dabei die sich in den Zuleitungen befindliche Restfarbe. To avoid the cleaning effort, ink fountains with a reduced ink supply are also known. DE 43 39 939 C2 describes a solution for creating such a minimally necessary color volume. Here, the ink is introduced under metered pressure via feed channels into the ink supply space of an element which extends along the ink fountain roller and delimits the storage space, the end face of the element being adjustable in a defined return gap distance from the inking roller.
A disadvantage of this solution is the large amount of fastening work that has to be carried out at higher pressures to ensure tightness and thus also makes an optional use more difficult. In the event of a color change, the poorly accessible device does not offer any time advantages in the cleaning process. A particular problem is the residual color in the supply lines.

Aufgabe der Erfindung ist die Schaffung eines leicht zu reinigenden Farbkastens.The object of the invention is to provide an easy-to-clean ink fountain.

Erfindungsgemäß wird die Aufgabe durch den Patentanspruch gelöst.According to the invention the object is achieved by the patent claim.

Nachfolgend wird die erfinderische Lösung an einem Ausführungsbeispiel näher erläutert.The inventive solution is explained in more detail using an exemplary embodiment.

Die Zeichnung zeigt einen Keilfarbkasten mit Einsatz.
Einer Duktorwalze 1 ist ein Unterteil 2 eines bekannten Keilfarbkastens zugeordnet, wobei am Unterteil 2 Farbdosierelemente 3 zur Einstellung eines Spaltes gegenüber der Duktorwalze 1 angeordnet sind. Auf das Unterteil 2 ist ein Farbkasteneinsatz 4 aufgesetzt und zwischen dem Unterteil 2 und der Unterseite 7 des Farbkasteneinsatzes ist zur Abdichtung eine Flachdichtung 5 angeordnet. Die Unterseite 7 des Farbkasteneinsatzes 4 ist über mindestens eine Befestigungsschraube 6 lösbar mit dem Unterteil 2 verbunden.
Mit der Unterseite 7 des Farbkasteneinsatzes 4 ist ein Farbverteilelement 8 fest verbunden. Das Farbverteilelement 8 weist eine in Wirkverbindung mit der Duktorwalze 1 stehende Stirnseite 9 auf Nach einer ersten Variante berührt die Stirnseite 9 nicht die Duktorwalze 1, d.h. es besteht ein geringer Spalt und nach einer zweiten Variante (nicht dargestellt) berührt die Stirnseite 9 des Farbverteilelementes 8, beispielsweise über ein rotierendes Element, die Duktorwalze.
Die Stirnseite 9 und die Farbdosierelemente 3 schließen in Verbindung mit der Unterseite 7 des Farbkasteneinsatzes 4 einen Farbvorratsraum 10 ein. An dem Farbverteilelement 8 ist ein Anschluß 11 für die Farbzufuhr zu dem Farbvorratsraum 10 angeordnet. Dieser Anschluß 11 ist mit einer Farbkartusche oder über eine Dosier- und Druckschaltereinheit mit einer Farbversorgungsanlage verbindbar. Am Farbkasteneinsatz 4 sind Griffe 12 angeordnet. Bei einem Farbwechsel wird der Anschluß 11 des Farbverteilelementes 8 von der Farbversorgungsanlage bzw. von der Farbkartusche, wenn sie nicht Bestandteil des Farbkasteneinsatzes ist, getrennt, die Befestigungsschraube gelöst und der Farbkasteneinsatz 4 aus dem Keilfarbkasten herausgenommen. Nunmehr ist die herausgenommene Einheit außerhalb der Druckmaschine reinigbar, wobei auch der Farbvorratsraum leicht zugänglich ist.The drawing shows a wedge color box with insert.
A duct roller 1 is assigned a lower part 2 of a known wedge ink fountain, 2 ink metering elements 3 being arranged on the bottom part for setting a gap relative to the duct roller 1. A paint box insert 4 is placed on the lower part 2 and a flat gasket 5 is arranged between the lower part 2 and the underside 7 of the paint box insert. The underside 7 of the ink fountain insert 4 is detachably connected to the lower part 2 via at least one fastening screw 6.
A color distribution element 8 is firmly connected to the underside 7 of the ink fountain insert 4. The ink distribution element 8 has an end face 9 that is operatively connected to the duct roller 1. According to a first variant, the end face 9 does not touch the duct roller 1, that is, there is a small gap and, according to a second variant (not shown), the end face 9 of the ink distributor element 8 touches , for example via a rotating element, the duct roller.
The front side 9 and the ink metering elements 3 enclose an ink supply space 10 in connection with the underside 7 of the ink fountain insert 4. A connector 11 for the ink supply to the ink supply space 10 is arranged on the ink distribution element 8. This connection 11 can be connected to a paint cartridge or to a paint supply system via a metering and pressure switch unit. Handles 12 are arranged on the ink fountain insert 4. In the event of a color change, the connection 11 of the ink distribution element 8 is separated from the ink supply system or from the ink cartridge, if it is not part of the ink fountain insert, the fastening screw is loosened and the ink fountain insert 4 is removed from the wedge ink fountain. The removed unit can now be cleaned outside the printing press, and the ink supply space is also easily accessible.

Nach dem Entfernen des Farbkasteneinsatzes kann ein neuer Farbkasteneinsatz eingesetzt und angeschlossen werden. Es ist aber auch möglich, den Keilfarbkasten ohne Farbkasteneinsatz zu verwenden. Eine Nachrüstung von Keilfarbkasten mit Farbkasteneinsätzen der beschriebenen Bauart ist problemlos möglich. After removing the ink fountain insert, a new ink fountain insert can be inserted and be connected. But it is also possible to use the wedge ink fountain without the ink fountain insert to use. A retrofit of wedge ink fountains with ink fountain inserts from described design is easily possible.

BezugszeichenaufstellungList of reference symbols

11
DuktorwalzeDuct roller
22nd
UnterteilLower part
33rd
FarbdosierelementColor metering element
44th
FarbkasteneinsatzInk fountain insert
55
FlachdichtungFlat gasket
66
BefestigungsschraubeFastening screw
77
Unterseitebottom
88th
FarbverteilelementColor distribution element
99
StirnseiteFace
1010th
FarbvorratsraumColor storage room
1111
AnschlußConnection
1212th
GriffHandle

Claims (5)

Keilfarbkasten für Druckmaschinen mit einem Unterteil (2) einschließlich Farbdosierelementen (3) zur Einstellung eines Spaltes gegenüber einer Duktorwalze (1), mit einem mit dem Unterteil (2) lösbar verbundenen und entfernbaren Farbkasteneinsatz (4) und einem mit dem Farbkasteneinsatz (4) verbundenen, mit einem Anschluß (11) für Druckfarbe versehenen Farbverteilelement (8), das mit seiner im geringen Abstand der Duktorwalze (1) zugeordneten Stirnseite (9) und den Farbdosierelementen (3) in Verbindung mit einer Unterseite (7) des Farbkasteneinsatzes (4) einen unter Druck stehenden Farbvorratsraum (10) bildet.Wedge ink fountain for printing machines with a lower part (2) including ink metering elements (3) for setting a gap in relation to a duct roller (1), with a the lower part (2) detachably connected and removable ink fountain insert (4) and one connected to the ink fountain insert (4), with a connection (11) for printing ink provided ink distribution element (8), with its at a short distance from the duct roller (1) assigned end face (9) and the color metering elements (3) in connection with a Bottom (7) of the ink fountain insert (4) a pressurized ink supply space (10) forms. Keilfarbkasten für Druckmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß der Anschluß (11) für Druckfarbe mit einer Farbkartusche verbindbar ist.Wedge ink fountain for printing machines according to claim 1, characterized in that the Connection (11) for printing ink can be connected to a color cartridge. Keilfarbkasten für Druckmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß der Anschluß (11) für Druckfarbe über einen Druckschalter mit einer Farbversorgungsanlage verbunden ist.Wedge ink fountain for printing machines according to claim 1, characterized in that the Connection (11) for printing ink via a pressure switch with an ink supply system connected is. Keilfarbkasten für Druckmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Farbkasteneinsatz (4) und dem Unterteil (2) des Keilfarbkastens eine Flachdichtung (5) angeordnet ist.Wedge ink fountain for printing machines according to claim 1, characterized in that between the ink fountain insert (4) and the lower part (2) of the wedge ink fountain a flat gasket (5) is arranged. Keilfarbkasten für Druckmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß die Stirnseite (9) des Farbverteilelementes (8) als ein die Duktorwalze (1) berührendes Teil ausgebildet ist.Wedge ink fountain for printing machines according to claim 1, characterized in that the Front side (9) of the ink distribution element (8) as a part touching the duct roller (1) is trained.
EP99111469A 1998-06-16 1999-06-12 Wedge ink duct Expired - Lifetime EP0965449B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19826817 1998-06-16
DE19826817A DE19826817A1 (en) 1998-06-16 1998-06-16 Wedge paint box

Publications (3)

Publication Number Publication Date
EP0965449A2 true EP0965449A2 (en) 1999-12-22
EP0965449A3 EP0965449A3 (en) 2000-04-05
EP0965449B1 EP0965449B1 (en) 2002-08-14

Family

ID=7871059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111469A Expired - Lifetime EP0965449B1 (en) 1998-06-16 1999-06-12 Wedge ink duct

Country Status (2)

Country Link
EP (1) EP0965449B1 (en)
DE (2) DE19826817A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1944832A1 (en) * 1969-09-04 1971-03-11 Muecher Hermann Elastic sealing ring for pipe connection points
DE2816881A1 (en) * 1977-04-18 1978-10-19 Harris Corp DEVICE FOR APPLYING COLOR TO A ROTATING ROLLER OF A PRINTING PRESS
EP0022912A1 (en) * 1979-07-24 1981-01-28 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Ink fountain for a rotary printing press
CH649954A5 (en) * 1980-03-11 1985-06-28 Wifag Maschf INSERT COLOR BOX.
DE4339939A1 (en) * 1993-11-24 1995-06-08 Robert Wagner Device for feeding printing ink into the inking unit of a printing press
DE19640775A1 (en) * 1996-10-02 1998-04-09 Roland Man Druckmasch Insert for wedge ink fountains in printers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199451A (en) * 1963-08-02 1965-08-10 Koppers Co Inc Ink distribution device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1944832A1 (en) * 1969-09-04 1971-03-11 Muecher Hermann Elastic sealing ring for pipe connection points
DE2816881A1 (en) * 1977-04-18 1978-10-19 Harris Corp DEVICE FOR APPLYING COLOR TO A ROTATING ROLLER OF A PRINTING PRESS
EP0022912A1 (en) * 1979-07-24 1981-01-28 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Ink fountain for a rotary printing press
CH649954A5 (en) * 1980-03-11 1985-06-28 Wifag Maschf INSERT COLOR BOX.
DE4339939A1 (en) * 1993-11-24 1995-06-08 Robert Wagner Device for feeding printing ink into the inking unit of a printing press
DE19640775A1 (en) * 1996-10-02 1998-04-09 Roland Man Druckmasch Insert for wedge ink fountains in printers

Also Published As

Publication number Publication date
EP0965449B1 (en) 2002-08-14
DE19826817A1 (en) 1999-12-23
EP0965449A3 (en) 2000-04-05
DE59902319D1 (en) 2002-09-19

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