EP0012177A1 - 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
EP0012177A1
EP0012177A1 EP79104006A EP79104006A EP0012177A1 EP 0012177 A1 EP0012177 A1 EP 0012177A1 EP 79104006 A EP79104006 A EP 79104006A EP 79104006 A EP79104006 A EP 79104006A EP 0012177 A1 EP0012177 A1 EP 0012177A1
Authority
EP
European Patent Office
Prior art keywords
ink
fountain
ink fountain
blade
fountain roller
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
EP79104006A
Other languages
German (de)
French (fr)
Other versions
EP0012177B1 (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

  • the invention relates to an ink fountain in the inking unit of rotary printing presses with an ink metering device which interacts with an ink fountain roller, the ink metering device having an ink knife extending over the length of the ink fountain roller.
  • Ink tanks of this type are used in the inking unit of letterpress or offset printing machines and are used to hold the ink supply.
  • To adjust the amount of ink to be transferred to the inking unit e.g. B. zone screws are used, by means of which the gap between the ink knife and ink fountain roller is changed zone by zone.
  • the known designs all have the disadvantage that the relatively slowly rotating ink fountain roller does not completely absorb the amount of ink passing through the slot and a small part of the ink settles 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.
  • the third possibility that the ink accumulating on the ink knife gets onto the ink fountain roller and is transported from it to the inking unit at irregular intervals has the disadvantage that an excess supply of color gets into the inking unit at certain points, resulting in a change in the coloration in the inking unit Area affects. This creates waste without the printer being able to prevent this by making any settings.
  • 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.
  • this is achieved in that in the area of the scraper edge a thin film strip is attached to the underside of the ink knife, which extends over and extends over the length of the scraper edge, approaches with its front region of the ink fountain roller and easily on that on the ink fountain roller existing color film grinds.
  • the film strip thus prevents the ink from sticking and dripping and returns the small amount of ink running off the ink knife to the ink film on the ink fountain roller.
  • 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, for. B. zoning screws 6 with respect to the ink fountain roller 2 is zonally adjustable.
  • a thin film strip 8 is attached, the attachment to the color knife 5 z. B. 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 area 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 mit einer Farbdosiereinrichtung, die mit einer Farbkastenwalze zusammenwirkt, wobei die Farbdosiereinrichtung ein sich über die Länge der Farbkastenwalze erstreckendes Farbmesser aufweist.The invention relates to an ink fountain in the inking unit of rotary printing presses with an ink metering device which interacts with an ink fountain roller, the ink metering device having an ink knife extending over the length of the ink fountain roller.

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 are used to hold the ink supply. To adjust the amount of ink to be transferred to the inking unit, e.g. B. zone screws are used, by means of which the gap between the ink knife and ink fountain roller is changed zone by zone.

Die bekannten Ausführungen haben alle den Nachteil, daß die sich relativ langsam drehende Farbkastenwalze 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 erforderlich. Die dritte Möglichkeit, daß die sich am Farbmesser ansammelnde Farbe auf die Farbkastenwalze gelangt und in unregelmäßigen Abständen von dieser ins Farbwerk transportiert wird, hat den Nachteil, daß hierdurch punktuell ein Überangebot an Farbe in das Farbwerk gelangt, sich in einer Veränderung der Farbgebung in diesem Bereich auswirkt. Hierdurch entsteht Makulatur, ohne daß der Drucker dies durch irgendwelche Einstellungen verhindern kann.The known designs all have the disadvantage that the relatively slowly rotating ink fountain roller does not completely absorb the amount of ink passing through the slot and a small part of the ink settles 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. The third possibility that the ink accumulating on the ink knife gets onto the ink fountain roller and is transported from it to the inking unit at irregular intervals has the disadvantage that an excess supply of color gets into the inking unit at certain points, resulting in a change in the coloration in the inking unit Area affects. 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 Abstreifkante an der Unterseite des Farbmessers ein dünner Folienstreifen befestigt ist, der sich über die Länge der Abstreichkante erstreckt und diese überragt, sich mit seinem vorderen Bereich der Farbkastenwalze nähert und leicht auf dem auf der Farbkastenwalze vorhandenen Farbfilm schleift. Der Folienstreifen verhindert somit ein Ansetzen und Abtropfen der Farbe und führt die am Farbmesser ablaufende geringe Farbmenge dem Farbfilm auf der Farbkastenwalze wieder zu. 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 in the area of the scraper edge a thin film strip is attached to the underside of the ink knife, which extends over and extends over the length of the scraper edge, approaches with its front region of the ink fountain roller and easily on that on the ink fountain roller existing color film grinds. The film strip thus prevents the ink from sticking and dripping and returns the small amount of ink running off the ink knife to the ink film on the ink fountain roller. This solution prevents the deficiencies listed with simple means and ensures an even ink flow 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, for. B. zoning screws 6 with respect to the ink fountain roller 2 is zonally adjustable.

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 region of the scraper edge 7, a thin film strip 8 is attached, the attachment to the color knife 5 z. B. 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 area 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 Funktion der Erfindung ein dünnes Kunststoffmaterial von ca. 0, 3 mm 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.

TEILELISTEPARTS LIST

  • 1 Farbkasten1 color box
  • 2 Farbkastenwalze2 ink fountain roller
  • 3 Walze3 roller
  • 4 Farbdosiereinrichtung4 color metering device
  • 5 Farbmesser5 color knives
  • 6 Zonenschrauben6 zone screws
  • 7 Abstreichkante7 scraper edge
  • 8 Folienstreifen8 film strips

Claims (3)

1. Farbkasten im Farbwerk von Rotationsdruckmaschinen mit einer Farbdosiereinrichtung, a) die mit einer Farbkastenwalze (2) zusammenwirkt, b) wobei die Farbdosiereinrichtung (4) ein sich über die Länge der Farbkastenwalze erstreckendes Farbmesser (5) aufweist, dadurch gekennzeichnet, c) daß im Bereich der Abstreichkante (7) an der Unterseite des Farbmessers (5) ein dünner Folienstreifen (8) befestigt ist, d) der sich über die Länge der Abstreichkante (7) erstreckt und diese überragt, e) sich mit seinem vorderen Bereich der Farbkastenwalze (2) nähert f) und leicht auf dem auf der Farbkastenwalze vorhandenen Farbfilm schleift. 1. ink fountain in the inking unit of rotary printing presses with an ink metering device, a) which interacts with an ink fountain roller (2), b) the ink metering device (4) having an ink knife (5) extending over the length of the ink fountain roller, characterized in that c) that in the area of the scraper edge (7) on the underside of the color knife (5) a thin film strip (8) is attached, d) which extends over the length of the scraper edge (7) and projects beyond it, e) approaches with its front area of the ink fountain roller (2) f) and grinds lightly on the ink film on the ink fountain roller. 2. Farbkasten nach Anspruch 1,
dadurch gekennzeichnet,
daß der vordere Bereich der Folienstreifen (8) etwa tangential zu der Mantelfläche der Farbkastenwalze (2) aufliegt.2. ink fountain according to claim 1,
characterized,
that the front area of the film strips (8) lies approximately tangentially to the outer surface of the ink fountain roller (2). 3. Farbkasten nach Anspruch 1 und 2,
dadurch gekennzeichnet, daß der Folienstreifen (8) aus Stahl oder Kunststoff besteht und durch Kleben am Farbmesser (5) befestigt ist.3. paint box according to claim 1 and 2,
characterized, that the film strip (8) consists of steel or plastic and is attached to the ink knife (5) by gluing.
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 true EP0012177A1 (en) 1980-06-25
EP0012177B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2332393A (en) * 1997-12-05 1999-06-23 Philip Miles Hardy Rotary short inker

Families Citing this family (2)

* 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

Citations (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
US3120802A (en) * 1958-04-29 1964-02-11 Richard K Smejda Roller printing machines
DE2555993A1 (en) * 1975-12-12 1977-06-16 Koenig & Bauer Ag DEVICE IN ROTARY PRINTING MACHINES TO PREVENT IRREGULAR COLOR TRANSFER TO THE PRINT FORM

Patent Citations (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
US3120802A (en) * 1958-04-29 1964-02-11 Richard K Smejda Roller printing machines
DE2555993A1 (en) * 1975-12-12 1977-06-16 Koenig & Bauer Ag DEVICE IN ROTARY PRINTING MACHINES TO PREVENT IRREGULAR COLOR TRANSFER TO THE PRINT FORM

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2332393A (en) * 1997-12-05 1999-06-23 Philip Miles Hardy Rotary short inker
GB2332393B (en) * 1997-12-05 2000-09-20 Philip Miles Hardy Rotary short inker

Also Published As

Publication number Publication date
DE2962467D1 (en) 1982-05-19
JPS5631264B2 (en) 1981-07-20
JPS5574879A (en) 1980-06-05
EP0012177B1 (en) 1982-04-07
DE2851606A1 (en) 1980-06-04
ATE812T1 (en) 1982-04-15

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