EP0453403A1 - Unité d'encrage et de mouillage pour une unité réversible d'une presse d'impression offset - Google Patents

Unité d'encrage et de mouillage pour une unité réversible d'une presse d'impression offset Download PDF

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Publication number
EP0453403A1
EP0453403A1 EP91810265A EP91810265A EP0453403A1 EP 0453403 A1 EP0453403 A1 EP 0453403A1 EP 91810265 A EP91810265 A EP 91810265A EP 91810265 A EP91810265 A EP 91810265A EP 0453403 A1 EP0453403 A1 EP 0453403A1
Authority
EP
European Patent Office
Prior art keywords
roller
dampening
inking
rollers
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
EP91810265A
Other languages
German (de)
English (en)
Other versions
EP0453403B1 (fr
Inventor
Andreas Miescher
Peter Gertsch
Robert Imhof
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik 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 Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Publication of EP0453403A1 publication Critical patent/EP0453403A1/fr
Application granted granted Critical
Publication of EP0453403B1 publication Critical patent/EP0453403B1/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
    • B41F31/008—Inking devices for reversible printing presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/36—Inking-rollers serving also to apply ink repellants

Definitions

  • the invention relates to an inking and dampening unit for a reversible printing unit of a rotary offset printing machine according to the type mentioned in the preamble of claim 1.
  • Such a reversible printing unit is known for example from CH-PS 557 238.
  • two central friction rollers are arranged, which can be connected to one another via convertible transfer rollers.
  • the first central rubbing roller is inked over a number of inking rollers that receive the ink from a duct roller.
  • the second central distribution roller receives the ink from a transfer roller, which comes into contact with both central distribution cylinders.
  • the other transfer roller connects the second central distribution roller to another distribution roller, which transfers the ink to an application roller.
  • Also arranged symmetrically to the second central distribution roller is a distribution roller, which in turn is in contact with another application roller.
  • the two transfer rollers are rotatably mounted on angle levers pivotable about the second central friction roller.
  • the two transfer rollers are in constant contact with the second central friction roller.
  • a transfer roller connects the first central distribution roller to the second central distribution roller, while the other transfer roller connects the second central distribution roller to a further distribution roller.
  • the symmetrical distribution roller and the associated application roller are switched off by the ink flow, and take on the task of dampening, since a dampening unit is assigned to each of the two symmetrical distribution rollers.
  • the transfer rollers are swiveled together, the ink flow takes place via the other distribution roller, while the former distribution roller takes over the dampening.
  • the plate cylinder can always be pre-moistened, i.e. the dampening solution is applied to the plate cylinder before the ink, even if the direction of rotation of the plate cylinder is reversed. This pre-wetting is desirable in some cases.
  • the ink and dampening unit configuration only allows this type of dampening solution supply to the plate cylinder, the so-called direct moistening.
  • the inking unit When changing from one ink to another, the inking unit has to be cleaned, which normally happens automatically.
  • the dampening unit rollers must also be cleaned.
  • a washing device is placed on one of the central friction rollers, for example. In order to enable cleaning of all inking and dampening unit rollers, cleaning would have to be done via the plate cylinder. However, this has the disadvantage that quick and thorough cleaning of the inking unit and dampening unit rollers is not possible.
  • the object of the invention is to arrange the inking and dampening unit rollers of a convertible printing unit in such a way that the diverse and product-dependent fountain solution supply options are ensured that automatic washing of the inking unit and dampening unit rollers is ensured can be carried out quickly and thoroughly and that even if the inking unit rollers are pre-inked, there is the possibility of being able to wet the inking unit.
  • first and the second transfer roller in two roller locks each, which are equipped with linear drives with which the two transfer rollers can be turned on and off on the central friction roller.
  • the linear drives can preferably in the tangential direction to the first.
  • second friction roller may be arranged. It is also advantageous, in each roller lock, to add a further linear drive in the radial direction to the first one. to attach the second friction roller to the position of the corresponding transfer roller relative to the first one. To be able to adjust friction rollers.
  • contactless dampening systems are advantageously used as dampening units. These can be, for example, contactless brush dampening systems or contactless spray dampening systems. These have the advantage of being do not have to be in direct contact with a roller, and consequently can dampen it regardless of an adjustment path of a roller.
  • the printing unit shown in Fig. 1 consists of a blanket cylinder 1, which with another cylinder 2, which is designed as an impression cylinder or blanket cylinder of an adjacent printing unit, and a plate cylinder 3.
  • a first applicator roller 5 is set on the plate cylinder 3.
  • the first applicator roller 5 is in contact with a first friction roller 6.
  • a swivel lever 7 is arranged on each end on which the first transfer roller 8 is freely rotatably mounted.
  • the first transfer roller 8 is switched off by the actuator 11 from the central friction roller 9 and receives the dampening solution sprayed on via a contactless dampening unit 10.
  • the first transfer roller 8, the first friction roller 6 and the first application roller 5 transfer the dampening solution to the plate cylinder 3, thus obtaining the desired pre-wetting.
  • the second transfer roller 12 which in turn is freely rotatable in pivoting levers 14 which are arranged pivotably about the second friction roller 22, is set against the central friction roller 9 by means of the actuator 15.
  • the central rubbing roller 9 is moved over the convertible inking roller 16, over the inking film roller 17, over the inking roller 18, on which the ink is metered via inking knife, arranged in the inking knife bar 19, and over the scoop roller 20, which is in the ink in the inking tank 21st dipped in, dyed in a known manner.
  • the second transfer roller 12 thus transfers the ink from the central distribution roller 9 to the second distribution roller 22, from where it is applied to the plate cylinder 3 via the second application roller 23.
  • the dampening unit 24 is not in operation in this operating mode of the printing unit.
  • an additional inking roller 25 is arranged, which is in contact with the central friction roller 9 and thus inks the plate cylinder 3.
  • the rollers 8, 6 and 5 fully perform the function of pure dampening unit rollers, while rollers 12, 22 and 23 fully fulfill the function of pure inking unit rollers. This results in optimal pre-wetting of the plate cylinder 3 for newspaper printing.
  • Fig. 2 shows the same printing unit as Fig. 1, but for a left-handed blanket cylinder 1.
  • the first transfer roller 8 is placed against the central friction roller 9.
  • the offer Parking takes place here via a linear drive 31 arranged in the roller lock (not shown), which can be pneumatically or electrically driven.
  • the second transfer roller 12 is turned off by the central friction roller 9. This is also the case here. Parking via a linear drive 32 arranged in the roller lock (not shown), electrically or pneumatically driven.
  • the dampening unit 10 is put out of operation.
  • the rollers 8, 6 and 5 thus fulfill the full function of inking unit rollers, the rollers 12, 22 and 23 are used as pure dampening unit rollers.
  • the two rubbing rollers 6 and 22 which are provided with a hard or hard-elastic surface, must fulfill both the function as a dampening roller and the function as an inking roller. Tests have shown that with a surface made of copper, this double function is very well fulfilled. It would also be conceivable to produce these two friction rollers 6 and 22 from a suitable plastic or a ceramic material.
  • the plate cylinder 3 can be moistened indirectly.
  • This operating mode is shown in FIG. 3.
  • the blanket cylinder 1 is clockwise.
  • Both the first transfer roller 8 and the second transfer roller 12 are set against the central friction roller and consequently serve as ink rollers.
  • the dampening unit 10 is in operation and dampens the first transfer roller. The dampening solution thus gets into the actual inking unit, but also directly onto the plate cylinder 3 via the rollers 6 and 5
  • the inking unit Before printing production is started with such a printing unit, the inking unit is pre-inked to save waste.
  • the application rollers 5, 25 and 23 are set off from the plate cylinder 3.
  • the first transfer roller 8 is switched off from the central friction roller 9.
  • the second transfer roller 12 is placed against the central friction roller 9.
  • All inking rollers are now pre-inked by letting the printing unit rotate.
  • the color screws in the color knife bar 19 can be preset from the scanner according to the subject to be printed. However, it is also possible to set the color screws to an average.
  • the aim is to minimize waste at the start of printing.
  • the inking and dampening unit must be cleaned. In the present case, this is done automatically with an deliverable washing device 30 and is shown in FIG. 5.
  • the washing device 30, which can be delivered in a known manner, consists of a spray bar 27, a doctor blade 28 and a collecting basin 29 for collecting the scraped-off cleaning liquid.
  • the first transfer roller 8 and the second transfer roller 12 are both employed on the central friction roller 9.
  • the cleaning liquid sprayed onto the central friction roller 9 is quickly distributed over all inking and dampening rollers.
  • the cleaning liquid returning to the central friction roller 9 is completely doctored off by the doctor blade 28 and fed to the collecting basin 29.
  • the washing is always carried out in the direction of rotation of the rollers shown in FIG. 5.
  • the dampening units 10 and 24 are not in operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP91810265A 1990-04-17 1991-04-10 Unité d'encrage et de mouillage pour une unité réversible d'une presse d'impression offset Expired - Lifetime EP0453403B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4012283 1990-04-17
DE4012283A DE4012283A1 (de) 1990-04-17 1990-04-17 Farb- und feuchtwerk fuer ein umsteuerbares druckwerk einer rotations-offsetdruckmaschine

Publications (2)

Publication Number Publication Date
EP0453403A1 true EP0453403A1 (fr) 1991-10-23
EP0453403B1 EP0453403B1 (fr) 1994-06-15

Family

ID=6404547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810265A Expired - Lifetime EP0453403B1 (fr) 1990-04-17 1991-04-10 Unité d'encrage et de mouillage pour une unité réversible d'une presse d'impression offset

Country Status (4)

Country Link
US (1) US5090314A (fr)
EP (1) EP0453403B1 (fr)
JP (1) JPH07102701B2 (fr)
DE (2) DE4012283A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233460C2 (de) * 1992-10-05 1995-11-23 Wifag Maschf Einrichtung zur Vermeidung von Schwingungen in Druckmaschinen
DE19501146C1 (de) * 1995-01-17 1996-04-25 Roland Man Druckmasch Feuchtwerk
DE19739283C2 (de) * 1997-09-08 2002-10-24 Roland Man Druckmasch Verfahren zum Erreichen des Fortdruckzustandes in einer Rollenrotationsdruckmaschine
DE10316240A1 (de) 2003-04-09 2004-11-04 Maschinenfabrik Wifag Walze für eine Druckmaschine und Verfahren zur Herstellung einer Walze
DE10317470B4 (de) * 2003-04-16 2005-10-06 Technotrans Ag Sprühfeuchtwerk
DE10352616A1 (de) * 2003-07-11 2005-02-10 Koenig & Bauer Ag Druckwerk einer Druckmaschine
DE102004047168A1 (de) * 2004-09-29 2006-04-06 Man Roland Druckmaschinen Ag Druckeinheit einer Druckmaschine
DE102006011859A1 (de) * 2006-03-15 2007-09-20 Heidelberger Druckmaschinen Ag Bogendruckmaschine
US20070214981A1 (en) * 2006-03-14 2007-09-20 Heidelberger Druckmaschinen Ag Sheet-fed printing machine
DE102007006063B4 (de) * 2007-02-07 2009-10-01 Koenig & Bauer Aktiengesellschaft Druckwerk einer Rotationsdruckmaschine
ATE490085T1 (de) 2007-02-07 2010-12-15 Koenig & Bauer Ag Druckwerk einer rotationsdruckmaschine und ein verfahren zum waschen eines feuchtwerks eines druckwerks

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516354A (en) * 1966-01-02 1970-06-23 Winkler Fallert & Co Ltd Displaceable ink and dampener rolls for reversible printing unit
FR2197734A1 (fr) * 1972-09-05 1974-03-29 Maschf Augsburg Nuernberg Ag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH457508A (de) * 1967-11-24 1968-06-15 Winkler Fallert & Co Maschf Umsteuerbares Druckwerk zu Offsetrotationsmaschinen
FR2102697A5 (fr) * 1970-08-17 1972-04-07 Etudes De Machines Speciales
US4690055A (en) * 1986-08-28 1987-09-01 Rockwell International Corporation Keyless inking system for offset lithographic printing press

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516354A (en) * 1966-01-02 1970-06-23 Winkler Fallert & Co Ltd Displaceable ink and dampener rolls for reversible printing unit
FR2197734A1 (fr) * 1972-09-05 1974-03-29 Maschf Augsburg Nuernberg Ag

Also Published As

Publication number Publication date
JPH05169639A (ja) 1993-07-09
DE59101914D1 (de) 1994-07-21
US5090314A (en) 1992-02-25
DE4012283A1 (de) 1991-10-24
JPH07102701B2 (ja) 1995-11-08
EP0453403B1 (fr) 1994-06-15

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