EP0951995A1 - Dispositif d'encrage pour une machine d'impression offset pour feuilles - Google Patents

Dispositif d'encrage pour une machine d'impression offset pour feuilles Download PDF

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Publication number
EP0951995A1
EP0951995A1 EP99107608A EP99107608A EP0951995A1 EP 0951995 A1 EP0951995 A1 EP 0951995A1 EP 99107608 A EP99107608 A EP 99107608A EP 99107608 A EP99107608 A EP 99107608A EP 0951995 A1 EP0951995 A1 EP 0951995A1
Authority
EP
European Patent Office
Prior art keywords
drive
rollers
roller
inking unit
inking
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
EP99107608A
Other languages
German (de)
English (en)
Other versions
EP0951995B1 (fr
Inventor
Joachim Müller
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
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0951995A1 publication Critical patent/EP0951995A1/fr
Application granted granted Critical
Publication of EP0951995B1 publication Critical patent/EP0951995B1/fr
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
    • B41F31/004—Driving means for ink rollers

Definitions

  • the invention relates to an inking unit for a sheetfed offset printing press according to the preamble of claim 1.
  • the ink to be printed is fed by an ink fountain roller via a lifter roller and a number of ink rollers on the Printing form applied and from there via an offset cylinder (Blanket cylinder) applied to the substrate.
  • the lifter roller downstream ink roller is usually designed as a friction roller (first Reiber) and performs adjustable periodic movements.
  • first Reiber In the single drum between this first grater and the inking rollers further Reber rollers can be provided.
  • These friction rollers show both for the Changier- as well as the rotational movement a drive.
  • This drive can be derived from the movement of the printing unit (plate cylinder) and consist of a gear train.
  • An inking unit of the type mentioned above is included especially through the machine of the R 700 series from MAN Roland Druckmaschinen AG known.
  • the other rollers in the single drum roller described above do not have their own Drive on, i.e. their rotational movement takes place via friction from the others Ink rollers (the graters). According to the speed of printing Color creates a more or less large slip between the driving roller and the correspondingly driven ink roller. This Slip is also increased by the existing bearing forces and leads to a reduction in the color flow and thus to a decrease in the ink layer thickness (ink density) applied.
  • In addition to the rollers, which have their own drive (friction) and that directly from them driven rollers also have inking units of the type described above also intermediate rolls, which do not have their own drive and which only be in contact with non-driven ink rollers. With these rollers takes the slip towards higher machine speeds indicates large values, i.e. at high Machine speeds (printing speeds) can be done without suitable countermeasures to a significant drop in color (decrease in color density the substrate).
  • the object of the present invention is therefore to provide an inking unit according to the Develop the preamble of claim 1 such that it is at higher machine speeds there is no color drop and furthermore Changes in print speed (machine speed) none cause negative effects on the coloring.
  • the inking unit in addition to a number has its own drive of rollers only rollers that via frictional contact directly from at least one provided with a drive Roller are driven.
  • this means that the inking unit has no rollers which are only indirectly provided with their own drive Rolls are driven. Those that do not have their own drive Rollers are therefore at least with their own drive Roller in contact.
  • a roller that does not have its own drive has two of its own Drive rollers in contact, or a non-own drive
  • the roller is in a roller with its own drive Contact, also with a roller that also has no drive, but that in turn cooperates with a roller having its own drive.
  • the drive for the rollers of the inking unit according to the invention can your own wheel train directly from the printing unit (plate cylinder), it is possible to have a fixed slip at certain points, i.e. an intended To generate speed difference.
  • Rolling with one from the printing unit derived drive are preferably designed as friction rollers, at which the drive generates both the traversing and the rotating movement.
  • certain intermediate rolls by means of a own controllable drive are provided, the upstream of the drive Control receives a speed signal from the machine or the printing unit.
  • the Powering the drives of these rollers takes place in such a way that the rollers Drive the speed values provided for the current printing speed. So it is possible to drive the intermediate rolls at such a speed, so that their peripheral speed is equal to that of the adjacent rollers. It is also possible to set predetermined slip values or speed differences, in order to obtain an additional dosing or color distribution option.
  • the advantage of an inking unit according to the invention is in particular that the Color drop at high printing speeds no longer in the otherwise observable can occur clearly. Also changes in the speed of the The machine (printing speed) no longer has a significant effect for a short time observing color changes. Otherwise these are caused by that when the speed changes, the rollers are driven only indirectly according to the friction conditions only gradually the corresponding peripheral speeds consequences. Furthermore, in a roller washing process the intermediate rollers with washing or solvent introduced into the roller train no longer block and worsen the washing result.
  • An ink fountain roller having its own drive acts with an ink fountain 1 2 together in a manner known per se.
  • the ink fountain 1 has not shown ink metering elements or a divided one or undivided color knife.
  • a reciprocating lifting roller 3 is arranged between the ink fountain roller 2 and one the first grater 4. This is alternately in contact with the ink fountain roller by a cam drive 2 and the grater 4 brought.
  • the amount of ink applied by the squeegee roller 3 to the grater 4 is then transported via inking rollers 5, 6, 7 to a second grater 8 and through rolled out the corresponding number of splitting processes into a thin color film.
  • the second grater 8 are two further inking rollers 9, 10 in contact, so that the ink film on the grater 8 in two ways to that with the plate cylinder 18th comes in contact inking rollers 14, 15, 16, 17.
  • the last inking roller 14 is over a further grater 13, which with the inking roller 15 in Contact is established, supplied with paint.
  • a second color flow takes place from the Reiber 8 an inking roller 10 and a further grater 12 for the inking rollers 16, 17.
  • the dampening roller and the other rollers of the dampening unit are in hinted at the figure.
  • the graters 4, 8, 12, 13 have their own and preferably from the printing unit derived drive on, by means of which these rollers both in rotation and can also be set in a preferably adjustable traversing movement.
  • the inking rollers 6 and 11 also have their own drive, the rotation time of these rollers is adjustable so that their peripheral speeds same or different according to a desired value to the peripheral speeds of contact with these rollers standing rollers.
  • a roller washing device 19 acts with the grater 13 in the form a drip pan and a squeegee adjustable on the grater 13 together.
  • a washing process hired a grater 13 and the via a spray device, not shown Inking unit detergent or solvent supplied.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP99107608A 1998-04-23 1999-04-16 Dispositif d'encrage pour une machine d'impression offset pour feuilles Expired - Lifetime EP0951995B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29807386U 1998-04-23
DE29807386U DE29807386U1 (de) 1998-04-23 1998-04-23 Farbwerk für eine Bogenoffsetdruckmaschine

Publications (2)

Publication Number Publication Date
EP0951995A1 true EP0951995A1 (fr) 1999-10-27
EP0951995B1 EP0951995B1 (fr) 2002-09-04

Family

ID=8056211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99107608A Expired - Lifetime EP0951995B1 (fr) 1998-04-23 1999-04-16 Dispositif d'encrage pour une machine d'impression offset pour feuilles

Country Status (3)

Country Link
EP (1) EP0951995B1 (fr)
AT (1) ATE223314T1 (fr)
DE (2) DE29807386U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001087036A2 (fr) * 2000-05-17 2001-11-22 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage d'une machine d'impression par rotative
EP2527148A3 (fr) * 2011-05-25 2013-01-23 Heidelberger Druckmaschinen AG Procédé d'impression et élément d'impression offset
EP3882033A1 (fr) * 2020-03-19 2021-09-22 Heidelberger Druckmaschinen AG Procédé de lavage d'un mécanisme d'encrage d'une machine d'impression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10000903A1 (de) 1999-02-05 2000-08-10 Heidelberger Druckmasch Ag Verfahren zum Betrieb einer Druckmaschine und Druckmaschine zur Durchführung des Verfahrens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19520841A1 (de) * 1995-06-08 1996-12-12 Roland Man Druckmasch Farbwerk für ein Offsetdruckwerk und Verfahren zum Einfärben und Feuchten der Druckform

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529204C2 (de) * 1995-08-09 1997-08-14 Roland Man Druckmasch Feuchtwerk für eine Offsetdruckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19520841A1 (de) * 1995-06-08 1996-12-12 Roland Man Druckmasch Farbwerk für ein Offsetdruckwerk und Verfahren zum Einfärben und Feuchten der Druckform

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001087036A2 (fr) * 2000-05-17 2001-11-22 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage d'une machine d'impression par rotative
WO2001087036A3 (fr) * 2000-05-17 2002-06-20 Koenig & Bauer Ag Dispositif d'encrage d'une machine d'impression par rotative
EP1457333A2 (fr) * 2000-05-17 2004-09-15 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage court d'une machine d'impression par rotative
US6886461B2 (en) 2000-05-17 2005-05-03 Koenig & Bauer Aktiengesellschaft Short inking system for a rotary printing machine
EP1457333A3 (fr) * 2000-05-17 2007-08-01 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage court d'une machine d'impression par rotative
EP2527148A3 (fr) * 2011-05-25 2013-01-23 Heidelberger Druckmaschinen AG Procédé d'impression et élément d'impression offset
EP3882033A1 (fr) * 2020-03-19 2021-09-22 Heidelberger Druckmaschinen AG Procédé de lavage d'un mécanisme d'encrage d'une machine d'impression

Also Published As

Publication number Publication date
ATE223314T1 (de) 2002-09-15
DE29807386U1 (de) 1998-08-06
EP0951995B1 (fr) 2002-09-04
DE59902523D1 (de) 2002-10-10

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