EP0012177B1 - Ink fountain in the inking unit of rotary printing presses - Google Patents

Ink fountain in the inking unit of rotary printing presses Download PDF

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Publication number
EP0012177B1
EP0012177B1 EP79104006A EP79104006A EP0012177B1 EP 0012177 B1 EP0012177 B1 EP 0012177B1 EP 79104006 A EP79104006 A EP 79104006A EP 79104006 A EP79104006 A EP 79104006A EP 0012177 B1 EP0012177 B1 EP 0012177B1
Authority
EP
European Patent Office
Prior art keywords
ink
fountain
blade
roll
fountain roll
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
EP79104006A
Other languages
German (de)
French (fr)
Other versions
EP0012177A1 (en
Inventor
Rudi Junghans
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to AT79104006T priority Critical patent/ATE812T1/en
Publication of EP0012177A1 publication Critical patent/EP0012177A1/en
Application granted granted Critical
Publication of EP0012177B1 publication Critical patent/EP0012177B1/en
Expired 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

Definitions

  • a known version of the ink fountain (US-PS 3120 802) uses a complex ink knife design, consisting of several parts, in which the last ink knife in the direction of rotation of the ink fountain roller determines the final ink layer thickness on the roller while removing the ink layer and thus reveals no possibility of how to pass through and Color runout can be prevented, which then gets into the inking unit in an uncontrolled manner.
  • this is achieved in that a thin, resilient film strip is attached to the underside of the ink knife in the region of the wiping edge and extends over and extends over the length of the wiping edge and grinds so lightly on the ink film present on the ink fountain roller that it attaches and dripping of paint on or from the ink knife is prevented and this feeds the small amount of ink running on the ink knife back to the ink film on the ink fountain roller.
  • a thin film strip 8 is attached, the attachment to the color knife 5 e.g. can be done by gluing.
  • the film strip 8 extends over the length of the ink knife 5 and thus the doctor edge 7 and projects beyond the ink knife 5 beyond the doctor edge 7.
  • the protruding part of the film strip 8 approaches the ink fountain roller 2 in its front region and rubs lightly on the ink film present on the ink fountain roller 2.
  • the film strip 8 is bent slightly so that it lies approximately tangentially to the outer surface of the ink fountain roller 2 on the ink film.
  • the material for the film strip 8 must be resilient, so that both steel and plastic can be used, a thin plastic material of approximately 0.3 mm thickness being completely sufficient for the function of the invention.

Landscapes

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

Abstract

1. An ink-fountain in the inking unit of a rotary printing press with an ink dosing device (4) acting with an ink-fountain roll (2) and having a fountain blade (5) stretching along the length of the ink-fountain roll and which, as looked at in the direction of turning of the ink-fountain roll has the function, as the last fountain blade, of controlling the final coating thickness on the ink-fountain roll, characterized in that near the stripping edge (7) on the lower side of the fountain blade (5) there is a thin, springingly elastic foil stripe (8) stretching over the length of the stripping edge (7) and running out past it so as to be sliding lightly on the ink coating present on the ink-fountain roll for stopping any building up of ink on the fountain blade and dropping of such ink from the blade and the small amount of ink running down the fountain blade (5) is run by the foil stripe (8) back on the ink-fountain roll (2).

Description

Die Erfindung betrifft einen Farbkasten im Farbwerk von Rotationsdruckmaschinen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an ink fountain in the inking unit of rotary printing presses according to the preamble of claim 1.

Farbkästen dieser Art werden im Farbwerk von Buchdruck- oder Offsetdruckmaschinen eingesetzt und dienen zur Aufnahme des Farbvorrates. Zum Einstellen der in das Farbwerk zu übertragenden Farbmenge werden z.B. Zonenschrauben verwendet, mittels denen der Spalt zwischen Farbmesser und Farbkastenwalze zonenweise verändert wird.Ink tanks of this type are used in the inking unit of letterpress or offset printing machines and serve to hold the ink supply. To set the amount of ink to be transferred to the inking unit, e.g. Zone screws are used, by means of which the gap between the ink knife and ink fountain roller is changed zone by zone.

Eine bekannte Ausführung des Farbkastens (US-PS 3120 802) verwendet eine aufwendige Farbmesserausfühivng, bestehend aus mehreren Teilen, bei der das in Drehrichtung der Farbkastenwalze letzte Farbmesser unter Farbschichtwegnahme die endgültige Farbschichtdicke auf der Walze bestimmt und damit keine Möglichkeit offenbart, wie das Hindurchtreten und Ablaufen von Farbe verhindert werden kann, die sodann unkontrolliert in das Farbwerk gelangt.A known version of the ink fountain (US-PS 3120 802) uses a complex ink knife design, consisting of several parts, in which the last ink knife in the direction of rotation of the ink fountain roller determines the final ink layer thickness on the roller while removing the ink layer and thus reveals no possibility of how to pass through and Color runout can be prevented, which then gets into the inking unit in an uncontrolled manner.

Andere bekannten Ausführungen (DE-OS 25 55 993) haben ebenfalls den Nachteil, daß die sich relativ langsam drehende Farbkastenwatze die durch den Schlitz hindurchtretende Farbmenge nicht restlos aufnimmt und sich ein geringer Teil der Farbe an der Unterkante des Farbmessers absetzt. Es bilden sich hier Farbtröpfchen, die entweder in einer Farbauffangschale abtropfen oder am Farbmesser verhärten und festkleben. Beide Möglichkeiten machen einen zusätzlichen Reinigungsaufwand (z.B. durch ein zusätzlich an der Unterseite von Farbwalze und Farbmesser umlaufendes Abwischband) erforderlich. Falls sich am Farbmesser ansammelnde Farbe auf die Farbkastenwalze gelangt und in unregelmäßigen Abständen von dieser ins Farbwerk transportiert wird, hat dies den Nachteil, daß hierdurch punktuell ein Überangebot an Farbe in das Farbwerk gelangt und sich in einer Veränderung der Farbgebung in diesem Bereich auswirkt. Hierdurch entsteht Makulatur, ohne daß der Drucker dies durch irgendwelche Einstellungen verhindern kann.Other known designs (DE-OS 25 55 993) also have the disadvantage that the relatively slowly rotating ink fountain is not completely absorbing the amount of ink passing through the slot and a small part of the color is deposited on the lower edge of the ink knife. Paint droplets are formed here, which either drip in a paint drip tray or harden and stick on the paint knife. Both options require additional cleaning effort (e.g. with an additional wiping belt running around the underside of the inking roller and ink knife). If ink that accumulates on the ink knife reaches the ink fountain roller and is transported from it to the inking unit at irregular intervals, this has the disadvantage that an excess supply of color gets into the inking unit at certain points and results in a change in the coloring in this area. This creates waste without the printer being able to prevent this by making any settings.

Aufgabe der Erfindung ist es, eine Farbdosiereinrichtung zu schaffen, die mit einfachen Mitteln die Zufuhr von Farbtropfen in das Farbwerk und das Ansetzen oder Abtropfen der Farbe vom Farbmesser verhindert.The object of the invention is to provide an ink metering device which prevents the supply of ink drops into the inking unit and the attachment or dripping of the ink from the ink knife with simple means.

Gemäß der Erfindung gelingt dies dadurch, daß im Bereich der Abstreichkante an der Unterseite des Farbmessers ein dünner federelastischer Folienstreifen befestigt ist, der sich über die Länge der Abstreichkante erstreckt und diese überragt und derart leicht auf dem auf der Farbkastenwalze vorhandenen Farbfilm schleift, daß ein Ansetzen und Abtropfen von Farbe an bzw. von dem Farbmesser verhindert ist und dieser die am Farbmesser ablaufende geringe Farbmenge dem Farbfilm auf der Farbkastenwalze - wieder zuführt. Diese Lösung verhindert die aufgeführten Mängel mit einfachen Mitteln und gewährleistet einen gleichmäßigen Farbfluß in das Farbwerk der Druckmaschine.According to the invention, this is achieved in that a thin, resilient film strip is attached to the underside of the ink knife in the region of the wiping edge and extends over and extends over the length of the wiping edge and grinds so lightly on the ink film present on the ink fountain roller that it attaches and dripping of paint on or from the ink knife is prevented and this feeds the small amount of ink running on the ink knife back to the ink film on the ink fountain roller. This solution prevents the deficiencies listed with simple means and ensures an even flow of ink into the inking unit of the printing press.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 und 3 wiedergegeben.Advantageous embodiments of the invention are given in claims 2 and 3.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt.An embodiment of the invention is shown in the drawing.

In bekannter Weise ist der Farbkasten 1 der Farbkastenwalze 2 zugeordnet, die über die Walze 3 mit dem Farbwerk der Druckmaschine in Verbindung steht. Der Farbkasten 1 ist mit einer Farbdosiereinrichtung 4 versehen, die aus einem sich über die Länge der Farbkastenwalze 2 erstreckenden Farbmesser 5 besteht, das wiederum z.B. über Zonenschrauben 6 gegenüber der Farbkastenwalze 2 zonal einstellbar ist.In a known manner, the ink fountain 1 is assigned to the ink fountain roller 2, which is connected to the inking unit of the printing press via the roller 3. The ink fountain 1 is provided with an ink metering device 4, which consists of an ink knife 5 extending over the length of the ink fountain roller 2, which in turn e.g. Zonal screws 6 can be adjusted zonally relative to the ink fountain roller 2.

An der Unterseite des Farbmessers 5 im Bereich der Abstreichkante 7 ist ein dünner Folienstreifen 8 befestigt, wobei die Befestigung am Farbmesser 5 z.B. durch Kleben erfolgen kann. Der Folienstreifen 8 erstreckt sich über die Länge des Farbmessers 5 und somit der Abstreichkante 7 und überragt das Farbmesser 5 über die Abstreichkante 7 hinaus. Der überstehende Teil des Folienstreifens 8 nähert sich in seinem vorderen Bereich der Farbkastenwalze 2 und schleift leicht auf dem auf der Farbkastenwalze 2 vorhandenen Farbfilm. Hierbei wird der Folienstreifen 8 etwas durchgebogen, so daß er etwa tangential zu der Mantelfläche der Farbkastenwalze 2 auf dem Farbfilm aufliegt.On the underside of the color knife 5 in the area of the scraper edge 7 a thin film strip 8 is attached, the attachment to the color knife 5 e.g. can be done by gluing. The film strip 8 extends over the length of the ink knife 5 and thus the doctor edge 7 and projects beyond the ink knife 5 beyond the doctor edge 7. The protruding part of the film strip 8 approaches the ink fountain roller 2 in its front region and rubs lightly on the ink film present on the ink fountain roller 2. Here, the film strip 8 is bent slightly so that it lies approximately tangentially to the outer surface of the ink fountain roller 2 on the ink film.

Das Material für den Folienstreifen 8 muß federelastisch sein, so daß sowohl Stahl als auch Kunststoff verwendet werden kann, wobei für die Function der Erfindung ein dünnes Kunststoffmaterial von ca. 0,3mm Dicke vollständig ausreichend ist.The material for the film strip 8 must be resilient, so that both steel and plastic can be used, a thin plastic material of approximately 0.3 mm thickness being completely sufficient for the function of the invention.

Claims (3)

1. An ink-fountain in the inking unit of a rotary printing press with an ink dosing device (4) acting with an ink-fountain roll (2) and having a fountain blade (5) stretching along the length of the ink-fountain roll and which, as looked at in the direction of turning of the ink-fountain roll has the function, as the last fountain blade, of controlling the final coating thickness on the ink-fountain roll, characterized in that near the stripping edge (7) on the lower side of the fountain blade (5) there is a thin, springingly elastic foil stripe (8) stretching over the length of the stripping edge (7) and running out past it so as to be sliding lightly on the ink coating present on the ink-fountain roll for stopping any building up of ink on the fountain blade and dropping of such ink from the blade and the small amount of ink running down the fountain blade (5) is run by the foil stripe (8) back on the ink-fountain roll (2).
2. An ink fountain as claimed in claim 1, characterized in that the front part of the foil stripe (8) is generally tangential to the surface covering of the ink-fountain roll (2) against which it is rested.
3. An ink-fountain as claimed in claims 1 and 2, characterized in that the foil stripe (8) is made of steel or synthetic material and is fixed to the fountain blade (5) by sticking.
EP79104006A 1978-11-29 1979-10-17 Ink fountain in the inking unit of rotary printing presses Expired EP0012177B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104006T ATE812T1 (en) 1978-11-29 1979-10-17 INK BOX IN THE INK UNIT OF ROTARY PRESSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782851606 DE2851606A1 (en) 1978-11-29 1978-11-29 INKBOX IN THE INKING UNIT OF ROTARY PRINTING MACHINES
DE2851606 1978-11-29

Publications (2)

Publication Number Publication Date
EP0012177A1 EP0012177A1 (en) 1980-06-25
EP0012177B1 true EP0012177B1 (en) 1982-04-07

Family

ID=6055829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104006A Expired EP0012177B1 (en) 1978-11-29 1979-10-17 Ink fountain in the inking unit of rotary printing presses

Country Status (4)

Country Link
EP (1) EP0012177B1 (en)
JP (1) JPS5574879A (en)
AT (1) ATE812T1 (en)
DE (2) DE2851606A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857957A (en) * 1981-10-02 1983-04-06 Toshiba Mach Co Ltd Inking unit
DE4125253C2 (en) * 1991-07-31 1995-04-13 Roland Man Druckmasch Ink fountain of an inking unit of a printing press with an ink knife
GB2332393B (en) * 1997-12-05 2000-09-20 Philip Miles Hardy Rotary short inker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2351315A (en) * 1942-06-11 1944-06-13 Cottrell C B & Sons Co Ink fountain
AT215942B (en) * 1958-04-29 1961-06-26 Richard Kurt Smejda Device for adapting and setting the multi-color supply box against the roller pressure roller
DE2555993C3 (en) * 1975-12-12 1980-11-06 Koenig & Bauer Ag, 8700 Wuerzburg Ink box of an inking unit

Also Published As

Publication number Publication date
DE2962467D1 (en) 1982-05-19
EP0012177A1 (en) 1980-06-25
JPS5631264B2 (en) 1981-07-20
JPS5574879A (en) 1980-06-05
DE2851606A1 (en) 1980-06-04
ATE812T1 (en) 1982-04-15

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