EP0403861A2 - Méthode pour obtenir rapidement l'état d'impression - Google Patents

Méthode pour obtenir rapidement l'état d'impression Download PDF

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Publication number
EP0403861A2
EP0403861A2 EP90110437A EP90110437A EP0403861A2 EP 0403861 A2 EP0403861 A2 EP 0403861A2 EP 90110437 A EP90110437 A EP 90110437A EP 90110437 A EP90110437 A EP 90110437A EP 0403861 A2 EP0403861 A2 EP 0403861A2
Authority
EP
European Patent Office
Prior art keywords
printing
blanket
cylinder
during
ink
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
EP90110437A
Other languages
German (de)
English (en)
Other versions
EP0403861B1 (fr
EP0403861A3 (fr
Inventor
Anton Rodi
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25882079&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0403861(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE4013740A external-priority patent/DE4013740C3/de
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0403861A2 publication Critical patent/EP0403861A2/fr
Publication of EP0403861A3 publication Critical patent/EP0403861A3/fr
Application granted granted Critical
Publication of EP0403861B1 publication Critical patent/EP0403861B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/16—Programming systems for automatic control of sequence of operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply

Definitions

  • the invention relates to an offset printing machine with a dampening unit and an inking unit, which has an ink metering device for setting a color profile, wherein the inking unit and the dampening unit each have at least one applicator roller which can be displaced in contact with a printing form.
  • the inking unit In offset printing machines, it is necessary that a thin ink film is fed to the printing form wetted with dampening solution.
  • An inking unit provided with a plurality of rollers serves for this purpose.
  • the dampening solution is supplied by means of a dampening unit, which also has a roller arrangement.
  • the inking unit therefore has a color metering device which allows the zonal setting of a color profile. Depending on the setting of the individual zones, a corresponding color layer thickness results.
  • the ink is fed from a paint box using a paint ductor.
  • the printer has the task of making the zonal setting required Color metering device depending on the subject color requirements. This is done when setting up the offset press. Before the actual printing, a so-called ink run-in is also carried out, in which the said color film is built up within the inking unit. Movable applicator rollers are at a distance from the printing form, so that the subject is not yet colored.
  • the printing form is preferably formed by a plate cylinder, on the outer surface of which a printing plate having the subject is clamped.
  • the color is also distributed laterally at the ink inlet by traversing friction rollers. This keeps the color supple and evenly distributed on the side. In addition, undesirable color accumulations can be avoided.
  • the lateral rubbing leads z. B. at the ink inlet to the fact that the color profile built up by the ink metering device is evened out to a certain extent, so that it is not immediately available to the desired extent in the initial phase in the subsequent printing process. Thus, there is initially no satisfactory color distribution corresponding to the subject, which leads to the production of waste. Good printing results are only achieved when the production status is reached, in which the color profile corresponding to the subject has been established.
  • an inking unit presetting is known.
  • the inking unit rollers are fed with a precisely dimensioned ink quantity before the start of printing, so that a predetermined ink layer thickness distribution is established on the inking unit rollers.
  • DE-OS 15 61 100 shows an inking unit of rotary printing presses which has controllable lifting means in order to be able to separate certain groups of rollers. Relocate these lifting devices also the application rollers interacting with the printing form. In the event of a pressure interruption, the lifting means separate certain roller groups and also shut down the application rollers.
  • the invention is based on the object of creating an offset printing machine in which a color distribution which is close to production printing is established particularly quickly, so that waste is largely avoided.
  • this object is achieved according to the invention in that the application rollers for producing a color profile close to the production run continuously or temporarily during the running in of the ink before the start of printing or during a stopper which interrupts the production process Blanket washing process are shifted from a control device in the contact position to the printing form.
  • the rotating applicator rollers of the inking and dampening units thus do not take up the distance from the rotating printing form known from the prior art during the pressure-free time, but remain in the system position according to the invention.
  • the result of this is that the subject of the printing plate has a supporting effect on the color distribution in such a way that a color profile that largely corresponds to the subject is established.
  • the color profile set at the ink metering device is reduced by the Measure according to the invention, in particular on the applicator rollers, is reconstructed by interaction or reaction with the printing plate, so that a zonal ink supply with the required profiling takes place at the start of printing or immediately thereafter.
  • the applicator rollers of the inking unit but also those of the dampening unit, take up their abutment on the printing form in order to bring about the desired reaction process and also to prevent toning of areas of the subject, which are actually color-free.
  • the control device reduces the amount of dampening solution supplied compared to the amount supplied during continuous printing during the running-in of the ink, during the stopper or during the blanket washing process. This prevents excess dampening solution on the printing plate.
  • the dampening solution supply is preferably set to a value which covers any losses which occur (for example due to evaporation), so that there is a balance.
  • the metering of the amount of dampening solution adapted to the respective operating state is carried out by the control device by adjusting the speed of an immersion roller.
  • the immersion roller is in contact with part of its circumference with the dampening solution and transfers the amount of dampening solution conveyed by it to a subsequent metering roller of the dampening unit.
  • the delivery rate by adjusting the speed of the dipping roller, there is also an influence possible via the pressure between the dipping and metering rollers and by tilting the rollers to each other.
  • the blanket of a blanket cylinder of the offset printing machine is also colored simultaneously with or after the inking of the printing forme by the application position of the application rollers and printing form.
  • this also takes a measure that supports the rapid attainment of the production status.
  • the interaction between the rubber blanket and the printing form also has a positive influence on the color distribution, so that the production of a color distribution close to the production printing color distribution profile is supported.
  • the inking of the rubber blanket can take place by assuming a position of the inked printing form on the rubber blanket of the rubber blanket cylinder.
  • the blanket and printing form therefore have a contact position with one another, but the offset printing machine does not start printing, because the blanket is inked before the actual printing begins.
  • a printing cylinder of the offset printing machine In order to prevent a printing cylinder of the offset printing machine from becoming contaminated with the ink / water emulsion, it takes up a spacing position from the rubber blanket or blanket cylinder during the inking of the rubber blanket. It is for the use of the printing presses currently available on the market, it is advantageously possible to transfer the printing press to its printing operation position for inking the rubber blanket, but without commencing printing operation, whereby — in deviation from the normal printing operation position — a printing provision acting between the blanket cylinder and the printing cylinder is provided is driven out of their working area in the production position that the blanket of the blanket cylinder and the printing cylinder take up the spacing position. It is therefore used according to the invention the printing provision itself, which serves to compensate for paper thickness, by making a relative displacement between the blanket cylinder and the printing cylinder beyond its otherwise usual working range, so that the colored rubber blanket does not touch the printing cylinder.
  • the invention further relates to a method for producing a color distribution close to production in the inking unit of an offset printing press with a color metering device for setting a color profile and with a printing form in the contact position
  • Applicable application rollers of the inking unit and a dampening unit the application rollers being displaced into the system position during the running in of the ink before the start of printing or during a stopper or blanket washing process which interrupts the production process.
  • the amount of dampening solution can be reduced compared to the amount supplied during continuous printing.
  • the setting of the ink metering device is carried out by the printer in accordance with the subject and preferably remains unchanged when the applicator rollers are in the inventive position. According to a special embodiment, however, it is also possible for the ink metering device — in coordination with the dampening unit control and the application rollers — to be automatically adjusted in accordance with the operating conditions via a ink control device, so that optimum production conditions arise.
  • the process for producing a near-printing ink distribution is supported by the fact that, simultaneously with or after the inking of the printing form by the application position of application rollers and printing form by taking an application position of the printing form on the blanket of a blanket cylinder, the blanket is colored, in particular using a A print cylinder of the offset printing machine is shifted into a spacing position from the blanket cylinder. In particular, it is provided that the separation of the blanket cylinder and impression cylinder during a few revolutions of the blanket cylinder is made. The rubber blanket is then colored for a correspondingly long time.
  • FIG. 1 shows a schematic representation of an inking unit 1 and a dampening unit 2 of an offset printing machine.
  • the inking unit 1 has an ink fountain 3 with an ink metering device, from which an ink fountain pen 4 doses ink during operation.
  • a jack roller 5 interacts with the ink duct 4 and with a driven distribution cylinder 6.
  • Inking and dampening units 1, 2 also have further drive cylinders 7, 8, 9 and 10 provided with a drive.
  • six rider and transfer rollers 11 to 16 and two rubber rollers 17 and 18 are provided.
  • the inking unit 1 also has two rubber rollers 19 and 20 and three further rubber rollers 21 to 23 with a larger diameter.
  • two rubber rollers 24 and 25 with a smaller diameter than the rubber rollers 19 and 20 are provided.
  • the dampening unit 1 has a container 26 which is filled with dampening solution 27 into which it is immersed roller 28 dips with a portion of its circumference.
  • the dipping roller 28 interacts with a metering roller 29.
  • a rubber roller 30 and an intermediate roller 31 are provided.
  • Both ink and fountain solution are fed to a printing form 32 via the roller arrangement described.
  • the printing form 32 is designed as a plate cylinder 33, on the circumference of which a printing plate, not shown, is clamped.
  • the offset printing machine has a control device 35 (not shown in any more detail) which enables the application rollers 34 to be displaced.
  • An ink metering device 36 is arranged on the ink fountain 3 and is shown schematically in FIG.
  • the color metering device 36 enables a zonal setting of a color profile, which is shown by way of example in the diagram in FIG. 3, via the longitudinal extent of the color ductor 4.
  • the amount of ink delivery (ink layer thickness F) can be adjusted so that it is adapted to the ink requirements of the subject of the printing plate.
  • the application rollers 34 can be moved into both the position shown in FIG shift the given system position, ie the application rollers 34 of the inking unit 1 and dampening unit 2 are in contact with the printing plate clamped on the plate cylinder 33.
  • the arrows assigned to the application rollers 34 indicate that a shift can be carried out by means of the control device 35, so that there is a distance between the application rollers 34 and the outer surface of the plate cylinder 33 and thus to the surface of the clamped printing plate.
  • the application rollers 34 remain on the plate cylinder 33 in the contact position according to FIG. 1. In this way, a color profile close to production is achieved.
  • the application position can also be taken up by the application rollers 34 only temporarily, that is to say during a partial period of the running in of the ink or the interruption.
  • FIGS. 4, 5 and 6 show, by way of example, diagrams determined in color run-in tests, in which the solid density DV is plotted on the ordinate and the number of sheets produced after the start of printing is reproduced on the abscissa (sheet number BZ).
  • the in Figures 4 to 6 each solid curve shows the course of the solid density DV with a set color profile and a color run-in period of 6 minutes.
  • the applicator rollers 34 according to FIG. 1 are in their contact position during the ink run-in period. This can be done continuously, that is, during the entire color run-in period or only temporarily. Depending on the circumstances, different investment periods are also conceivable.
  • the system can also be used for a certain number of machine revolutions. During this running-in period or the duration of the installation, the amount of dampening solution added is increased as follows: Start: 33.3%, then 55.5%, the last 2 minutes 88.8% and finally - in continuous printing - 100%.
  • the line shown in dashed lines in FIGS. 4 to 6 shows the course of the solid tone density DV according to the method customary in the prior art, i. H. 6 minutes of ink run-in and adjustment of the ink metering device 36 according to the production profile.
  • the application rollers 34 are only shifted into the contact position on the plate cylinder 33 at the start of printing.
  • the amount of dampening solution added is 100%.
  • the curve consisting of points in FIGS. 4 to 6 likewise shows the course of the solid density DV according to the method known from the prior art: ink run-in time 6 minutes; the color profile is initially set evenly across the entire printing width and only after the 6 minutes have passed the production profile.
  • FIG. 4 shows the average value of the full-tone density DV averaged over all zones 37. It can be clearly seen that according to the method according to the invention, after a relatively small number of arcs, the curve strives for an end value which, in the methods known from the prior art, is only achieved after a significantly larger number of arcs. In the range 100 to 200 sheets, all 3 curves still show an increasing tendency of the solid density DV, although the curve increase is the smallest in the method according to the invention.
  • FIG. 5 shows the solid color density DV of a certain zone 37 which, owing to the subject, requires a relatively large amount of color. While the full-tone density DV rises only slowly after the start of printing in the known processes, in the process according to the invention it reaches the final value after only a few prints.
  • FIG. 6 shows the solid color density DV of a zone 37 which only requires a small amount of color.
  • the final value of the full-tone density DV which corresponds to the printing status, is reached much earlier in the method according to the invention than in the known methods.
  • the diagram in FIG. 7 shows the course of the solid ink density DV as a function of the number of sheets BZ in the event of a paper stop, ie there is an interruption in the printing status.
  • the rotating applicator rollers 34 remain in contact with the rotating plate cylinder 33 according to the invention.
  • the interruption time is 6 minutes, during this time the amount of dampening solution is increased from 44.4% to 55.5% and finally to 66.6%.
  • the start-up phase it amounts to 66.6% and finally reaches 100% in the printing condition. It can be clearly seen that the full-tone density DV has already reached its final value required for the production process after about 14 sheets.
  • FIGS. 8 and 9 show the course of the full-tone density DV after a feeder stop.
  • the application rollers 34 remain in the bearing position against the plate cylinder 33 during the stop.
  • the start-up takes place after 16 revolutions. This also applies to the test according to FIG. 9, but over-moistening is carried out here shortly before start-up.
  • the required solid ink density DV is reached approximately 15 sheets after printing operations are resumed.
  • the rubber blanket of a rubber blanket cylinder 40 can also be colored simultaneously with or after the inking of the printing form 32 (FIGS. 10 to 12).
  • FIG. 10 shows the plate cylinder 33 as well as a blanket cylinder 40 and a printing cylinder 41 of the offset printing machine.
  • the position of these cylinders in their position before the start of printing is shown: plate cylinder 33 and blanket cylinder 40 are at a distance from one another; blanket cylinders 40 and impression cylinders 41 are also slightly spaced from one another, their spacing being matched to the thickness of the printing material (for example paper).
  • the adjustment to the printing material thickness takes place by means of a so-called, not shown printing supply.
  • This preferably has an electric actuator for positioning.
  • the position of FIG. 11 is assumed.
  • printing operation is not started and, in deviation from the normal production printing position, the blanket cylinder 40 assumes a spacing position from the printing cylinder 41.
  • Printing form 32 and blanket cylinder 40 are in contact with each other, however, so that the inking process can be carried out.
  • the distance between the blanket cylinder 40 and the printing cylinder 41 is brought about by the aforementioned printing provision, in that it is moved out of its working area for paper thickness compensation by means of the electric actuator so that there is no contact between the blanket cylinder 40 and the printing cylinder 41. So there is a new one Use of the known pressure supply before.
  • the rubber blanket is colored during a few revolutions of the corresponding cylinder.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP90110437A 1989-06-19 1990-06-01 Méthode pour obtenir rapidement l'état d'impression Revoked EP0403861B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3919922 1989-06-19
DE3919922 1989-06-19
DE4013740A DE4013740C3 (de) 1989-06-19 1990-04-28 Verfahren und Vorrichtung zum schnellen Erreichen des Fortdruckzustands bei einer Offsetdruckmaschine
DE4013740 1990-04-28

Publications (3)

Publication Number Publication Date
EP0403861A2 true EP0403861A2 (fr) 1990-12-27
EP0403861A3 EP0403861A3 (fr) 1991-06-12
EP0403861B1 EP0403861B1 (fr) 1994-08-31

Family

ID=25882079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110437A Revoked EP0403861B1 (fr) 1989-06-19 1990-06-01 Méthode pour obtenir rapidement l'état d'impression

Country Status (4)

Country Link
US (1) US5081926A (fr)
EP (1) EP0403861B1 (fr)
JP (1) JPH07102692B2 (fr)
AU (1) AU631889B2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706885A1 (fr) * 1994-10-15 1996-04-17 MAN Roland Druckmaschinen AG Procédé pour la formation d'une couche d'encre d'une épaisseur orientée vers l'impression continue dans une unité d'encrage
FR2747609A1 (fr) * 1996-04-17 1997-10-24 Roland Man Druckmasch Procede pour alimenter en encre une machine d'impression
FR2750921A1 (fr) * 1996-07-12 1998-01-16 Roland Man Druckmasch Dispositif pour etablir rapidement un etat d'impression continue dans une unite d'impression
US6397744B1 (en) 1998-01-09 2002-06-04 Koenig & Bauer Aktiengesellschaft Method and device for influencing ink distribution

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128537A1 (de) * 1991-08-28 1993-03-04 Heidelberger Druckmasch Ag Verfahren zum einstellen eines fortdruckfarbprofils
US5592880A (en) * 1993-12-30 1997-01-14 Heidelberger Druckmaschinen Method of supplying or feeding dampening solution
DE4430801C2 (de) * 1994-08-30 2003-04-17 Metronic Ag Druckeinrichtung zum Bedrucken von Plastik-Kärtchen
DE4435991C2 (de) * 1994-10-08 1998-02-12 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Konstanthalten von Farbschichtdicken in einem Farbwerk einer Druckmaschine
DE19510082C2 (de) * 1995-03-20 1997-07-17 Roland Man Druckmasch Verfahren und Vorrichtung zur Steuerung der Bogenzufuhr bei einer bogenverarbeitenden Offsetdruckmaschine
JPH1016193A (ja) * 1996-06-27 1998-01-20 Komori Corp インキ膜厚の制御方法
DE10057051B4 (de) * 1999-12-06 2011-03-10 Heidelberger Druckmaschinen Ag Verfahren zum Anfahren einer Druckmaschine
US6612233B2 (en) * 2000-02-18 2003-09-02 Mitsubishi Heavy Industries, Ltd. Sheet feed offset press
DE10114250A1 (de) * 2001-03-22 2002-09-26 Fischer & Krecke Gmbh & Co Druckverfahren
DE10209861B4 (de) 2002-03-06 2012-10-04 manroland sheetfed GmbH Verfahren und Vorrichtung zur Farbzufuhrsteuerung
DE102008032393A1 (de) * 2007-07-27 2009-01-29 Heidelberger Druckmaschinen Ag Fortdruckbeginn bei reduziertem Feuchtmittelauftrag
JP6114503B2 (ja) 2012-04-26 2017-04-12 株式会社小森コーポレーション インキ供給方法およびインキ供給装置
JP2013240986A (ja) * 2012-04-27 2013-12-05 Komori Corp 液体転写装置及び液体転写方法
JP6093152B2 (ja) 2012-11-12 2017-03-08 株式会社小森コーポレーション インキ供給方法およびインキ供給装置
JP6240481B2 (ja) 2013-11-22 2017-11-29 株式会社小森コーポレーション インキ供給方法およびインキ供給装置
CN105848900A (zh) 2013-11-22 2016-08-10 小森公司 墨提供方法以及墨提供装置
DE102014007852A1 (de) * 2014-05-22 2015-11-26 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben einer Druckmaschine
DE102016217075A1 (de) * 2015-10-06 2017-04-06 Heidelberger Druckmaschinen Ag Verfahren zur Erstellung einer Voreinstellkennlinie
JP6236516B2 (ja) * 2016-11-29 2017-11-22 株式会社小森コーポレーション インキ供給方法およびインキ供給装置

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US3056346A (en) * 1960-01-14 1962-10-02 Addressograph Multigraph Printing machine
US3771446A (en) * 1970-05-11 1973-11-13 Ricoh Kk Automatic offset printing press
US4000692A (en) * 1974-12-03 1977-01-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag Throw-off system for rotary offset printing press
JPS5715968A (en) * 1980-05-27 1982-01-27 Ryobi Ltd Operating lever apparatus for printer
DE3338143C2 (de) * 1983-10-20 1986-12-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Verfahren zur Erzeugung einer dem Druckbild entsprechenden Farbschichtstärke im Farbwerk einer Druckmaschine
JPH0686122B2 (ja) * 1985-08-27 1994-11-02 東レ株式会社 印刷機における刷り出し濃度制御方法
JPH0686123B2 (ja) * 1985-08-27 1994-11-02 東レ株式会社 オフセット印刷機における印刷一時停止濃度制御方法
DE3707695A1 (de) * 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag Verfahren zur definierten erzeugung einer dem fortdruck nahen farbverteilung im farbwerk von rotationsdruckmaschinen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706885A1 (fr) * 1994-10-15 1996-04-17 MAN Roland Druckmaschinen AG Procédé pour la formation d'une couche d'encre d'une épaisseur orientée vers l'impression continue dans une unité d'encrage
FR2747609A1 (fr) * 1996-04-17 1997-10-24 Roland Man Druckmasch Procede pour alimenter en encre une machine d'impression
US5806429A (en) * 1996-04-17 1998-09-15 Man Roland Druckmaschinen Ag Process for supplying a printing machine with ink
FR2750921A1 (fr) * 1996-07-12 1998-01-16 Roland Man Druckmasch Dispositif pour etablir rapidement un etat d'impression continue dans une unite d'impression
US6543354B1 (en) 1996-07-12 2003-04-08 Man Roland Druchmaschinen Ag Device for quickly establishing a production-run state in a printing group of a rotary printing machine
US6397744B1 (en) 1998-01-09 2002-06-04 Koenig & Bauer Aktiengesellschaft Method and device for influencing ink distribution

Also Published As

Publication number Publication date
EP0403861B1 (fr) 1994-08-31
AU631889B2 (en) 1992-12-10
JPH0397564A (ja) 1991-04-23
JPH07102692B2 (ja) 1995-11-08
AU5753690A (en) 1990-12-20
US5081926A (en) 1992-01-21
EP0403861A3 (fr) 1991-06-12

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