EP0195848B1 - Dispositif de fixation et de repérage des clichés sur les cylindres de porte-plaque dans les machines d'impression lithographique pour l'impression offset - Google Patents

Dispositif de fixation et de repérage des clichés sur les cylindres de porte-plaque dans les machines d'impression lithographique pour l'impression offset Download PDF

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Publication number
EP0195848B1
EP0195848B1 EP85114686A EP85114686A EP0195848B1 EP 0195848 B1 EP0195848 B1 EP 0195848B1 EP 85114686 A EP85114686 A EP 85114686A EP 85114686 A EP85114686 A EP 85114686A EP 0195848 B1 EP0195848 B1 EP 0195848B1
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
stop
plate
probes
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 - Lifetime
Application number
EP85114686A
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German (de)
English (en)
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EP0195848A3 (en
EP0195848A2 (fr
Inventor
Riccardo Rimini
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.)
CESSIONE;RICCARDO RIMINI
Original Assignee
ARNOLDO MONDADORI EDITORE SpA OFFICINE GRAFICHE
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Publication date
Application filed by ARNOLDO MONDADORI EDITORE SpA OFFICINE GRAFICHE filed Critical ARNOLDO MONDADORI EDITORE SpA OFFICINE GRAFICHE
Publication of EP0195848A2 publication Critical patent/EP0195848A2/fr
Publication of EP0195848A3 publication Critical patent/EP0195848A3/de
Application granted granted Critical
Publication of EP0195848B1 publication Critical patent/EP0195848B1/fr
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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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the present invention relates to an attachment device for attaching the printing plates to the printing cylinders of offset planographic printing presses, the printing cylinder having two opposing tensioning rails in a cylinder pit and mechanical stop probes connected to a light-emitting diode and connected to a voltage source being provided interact in the recesses provided in the pressure plate.
  • the quality of the colored prints depends, among other things, on the flawless placement of the printing plates for the individual colors on the associated cylinder.
  • an inaccurate attachment of even a single one of the printing plates provided can, in practice, be all processing phases carried out before the printing phase, e.g. the photographic selection of the images, the assembly of the texts and the selected positives on the astralon, the assembly pair on the printing plate etc. impair with subsequent serious economic effects and loss of time.
  • the tensioning rails can be moved approximately in the circumferential direction of the cylinder by means of tensioning screws which can be screwed into them and are supported on a wall of the plate cylinder pit.
  • DE-A-3 000 576 enables the positioning rail to be adjusted from the zero position and to be readjusted with the proposed positioning device.
  • the positioning device - consists of a measuring device measuring the distance between a reference surface of the cylinder pit and the tensioning rail, a display device indicating the zero position of the tensioning rail and an adjusting device adjusting the zero position with a stylus.
  • the disadvantage of this device is that the register pin for the pressure plate is attached directly to the movable clamping rail. The printing plate is then clamped by moving the clamping rail carrying the register pin, so that the register pin itself is moved. This can severely affect the alignment of the printing plates, so that compliance with the printing plate orientation differs depending on the clamping. Due to the fact that the printing plate is positioned in register on the movable clamping rail, an exact lateral and extensive positioning of the clamping rail itself with respect to the plate cylinder is additionally required. The alignment process is lengthy and in itself not perfect. The device according to DE-A-3 000 576 also requires a large number of mechanical and electrical individual parts and is also complex.
  • DE-A-3 325 583 shows a stop system for printing plates, in particular for printing plate punches, the problem to be solved is to improve the stop system in such a way that a special design of the contact pins for receiving mechanical contactors can be omitted.
  • the contact pins themselves are designed as electrical contactors.
  • DE-A-3 325 583 does not contain any suggestion to include a signaling element in the stop pin itself.
  • FIG. 2 of this document also shows that the proposed stop pin device requires several individual parts and a complex switching control.
  • the present invention has for its object to provide an attachment device for attaching the printing plates to the printing cylinder of offset planographic printing presses, which is able to carry out the attachment process of the printing plates in a simple, fast and extremely reliable manner, whereby the operator is provided with perfect, clear evidence of the accuracy of the attachment process carried out.
  • each stop probe has its own light emitting diode.
  • Each individual light-emitting diode only lights up when a correct relative position of the printing plate has been reached at each individual point.
  • the stop probes thus work independently of one another. This ensures that the printing plate is always properly positioned, even if the recesses in the printing plate are deformed or enlarged.
  • a first advantage is a significant reduction in the time required to start up the offset printing presses. This is important because of the color printing The process on these printing machines is usually carried out with four colors and therefore four printing cylinders or printing plates are required. It should be emphasized that such a time reduction can be achieved for every cylinder.
  • Another important advantage can be seen in the significant reduction in the printing plate deformations achieved, since the printing plates can be attached to the printing cylinders practically without any risk of twisting.
  • Another important advantage of the attachment device according to the invention is that any possibility of deformation is avoided or eliminated which can be traced back to subsequent rough readjustments of the pressure plate which are carried out by actuating the clamping screws of the pressure plate clamping jaws.
  • the best possible preparation process is achieved in a shorter time.
  • Another advantage is also a dramatic reduction in the amount of ejection material or paper that arises when the printing press is started up. Because the exact color overlay when commissioning the printing. machine can be reached in a shorter time, it is no longer necessary to work with tests as in the known attachment systems.
  • the attachment devices according to the invention can also be handled with extreme simplicity and effectiveness.
  • the effectiveness is based on safe contact between the rectilinear stop sides, i.e. the visual collimation principle is used.
  • the design of the stop and signal units according to the invention makes it possible to equip existing pressure cylinders with the same.
  • each printing cylinder 1 carries its own printing plate, designated 2.
  • the printing cylinder 1 has, in a manner known per se, a flattening 3 in which the two printing plate clamping jaws 4, 5, which serve to tension or block the printing plate 2 in the region of their two end margins, are received or held.
  • Such pressure plate clamping jaws designed as opposing strip sections, are known per se and are therefore not described in detail.
  • the attachment device in each case consists of a mechanical stop probe 6 which is designed as a block and has a square cross section in the present example.
  • a receptacle opening is provided which serves to receive a light-emitting diode or LED 8, the diode connection ends 8a, 8b of which are switched on in a circuit described in more detail below.
  • the stop probe 6 is firmly connected to the support plate 9 provided with openings 10, the latter serving to fasten the stop probe 6 in the body of the pressure cylinder 1.
  • the mechanical stop probe 6 and the associated LED 8 each form a stop and signal unit 11.
  • three stop and signal units 11 are used, which are arranged along an axis-parallel line of the printing cylinder 1, namely in the vicinity of the pressure plate clamping jaw 4. With 12 in the pressure plate 2 worked recesses are designated, the fit between the latter and the mechanical. Stop probes 6 can be seen in particular from FIG. 2.
  • the two lateral signal units 11 are used to control a circumferential contact to fire the respectively assigned LED 8, whereas the middle signal unit 11 provides for their LED 8 to be fired when touching the side.
  • mutually interacting sides are provided which have a straight course.
  • the central signal unit 11 provided with the side cooperating sides 6b and 12b therefore has the task of ensuring the lateral alignment, the fitting recess having a greater axial length than the block and a greater width than the width of the latter.
  • the circuit arrangement or circuit provided for the signal units 11 contains a voltage source 13, a resistor 14 for limiting the operating current and a switch 15.
  • the electrical components mentioned are connected in series with one another, the circuit being closed via the body of the printing cylinder 1 is.
  • the resistance value of the resistor 14 can be approximately 1 k 0.
  • the stop probes 6 are made of ground steel according to ISO / h5 standards and have a cross section that is smaller than the cross section of the fitting recess 12 provided in the pressure plate 2, one side of the stop probe 6 as a reference plane for the edge of the pressure plate fitting recess, as above mentions, serves.
  • the stop probe 6 is of course mounted in an electrically insulated manner in the pressure cylinder 1.
  • the precise attachment is achieved by forming an engagement contact between the longitudinal and transverse sides 12a / 12b of the fitting recesses 12 and the adjacent sides 6a / 6b of the stop probes 6 by the ignition of the assigned LED diodes 8 signaled immediately. Because of this diode ignition, which signals the exact positioning of the pressure plate 2 and is maintained during the subsequent clamping phase of the pressure plate 2 by means of the tensioning rail 4, the operator can proceed not only in a simpler manner, but above all in a faster and more secure manner. In order to keep the consumption of electrical energy as low as possible, the LEDs 8 are switched off by the switch 15 after the attachment process has taken place. The switch 15 is then closed only for the subsequent preparation phase for a new printing plate.
  • the LEDs could e.g. through further electrical signaling components, e.g. Indicator lights, magnetic or acoustic indicators, etc. are replaced.
  • the dimensions, the geometrical designs of the block-like stop probes as well as the openings in the pressure plates, the number of signal units and furthermore the circuit components can be freely selected.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (3)

1. Dispositif de fixation et de repérage des clichés sur les cylindres porte-plaque de machines d'impression lithographique pour l'impression offset, dans lequel lé cylindre porte-plaque présente deux glissières se faisant face dans une fosse du cylindre et dans lequel il est prévu des détecteurs de butée mécaniques, reliés à une diode luminescente et raccordées à une source de tension, qui coopèrent avec des cavités d'adaptation prévues dans le cliché, caractérisé par la combinaison des caractéristiques suivantes:
a) il est prévu trois détecteurs de butée mécaniques (6), sous la forme de blocs parallèlépipédi- ques, électriquement isolés par rapport au cylindre porte-plaque (1), fixés directement au cylindre porte-plaque (1) le long d'une arête, parallèle à l'axe, de la fosse de cylindre (3);
b) chaque détecteur de butée (6) présente un logement creux (7) pour recevoir une diode luminescente (8) et forme avec-celle-ci une unité de signalisation (11), ce qui permet de fermer, par la source de tension (13) et les blocs ainsi que le cliché (2), un circuit électrique dans lequel les trois unités de signalisation (11) sont raccordées en parallèle.
2. Dispositif de fixation et de repérage suivant la revendication 1, caractérisé en ce que chaque détecteur de butée (6) est fixé solidement à une plaque de support (9), qui est pourvue de deux découpes (10) oblongues et ouvertes vers un côté extérieur de ladite plaque de support (9).
3. Dispositif de fixation et de repérage suivant la revendication 1, caractérisé en ce que les trois détecteurs de butée (6) sont solidement fixés à une première face de chant de la fosse de cylindre (3) du cylindre porte-plaque (1), où sont situées les glissières (4, 5).
EP85114686A 1985-03-28 1985-11-19 Dispositif de fixation et de repérage des clichés sur les cylindres de porte-plaque dans les machines d'impression lithographique pour l'impression offset Expired - Lifetime EP0195848B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2012585 1985-03-28
IT20125/85A IT1183507B (it) 1985-03-28 1985-03-28 Dispositivo di messa a registro delle lastre da stampa sui cilindri di macchine da stampa offset piane

Publications (3)

Publication Number Publication Date
EP0195848A2 EP0195848A2 (fr) 1986-10-01
EP0195848A3 EP0195848A3 (en) 1987-12-02
EP0195848B1 true EP0195848B1 (fr) 1990-09-26

Family

ID=11164009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114686A Expired - Lifetime EP0195848B1 (fr) 1985-03-28 1985-11-19 Dispositif de fixation et de repérage des clichés sur les cylindres de porte-plaque dans les machines d'impression lithographique pour l'impression offset

Country Status (3)

Country Link
EP (1) EP0195848B1 (fr)
DE (1) DE3527103A1 (fr)
IT (1) IT1183507B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551976A1 (fr) * 1992-01-17 1993-07-21 Komori Corporation Dispositif pour monter une plaque sur un cylindre porte-plaque
EP0555782A1 (fr) * 1992-02-10 1993-08-18 Komori Corporation Dispositif pour confirmer la condition d'insertion d'une plaque d'impression
DE4226780A1 (de) * 1992-08-13 1994-02-24 Roland Man Druckmasch Vorrichtung zur Kontrolle der registergerechten Anlage einer Druckplatte auf dem Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen
WO1995001874A1 (fr) * 1993-07-07 1995-01-19 Amcor Limited Procede ameliore de reglage de plaques d'imprimerie
US5461980A (en) * 1992-07-31 1995-10-31 Komori Corporation Plate mounting apparatus for printing press
US5479859A (en) * 1993-11-12 1996-01-02 Man Roland Druckmaschinen Ag Method and apparatus for controlling the automated changing of printing plates in printing machines
US5533451A (en) * 1992-04-13 1996-07-09 Toyo Ink Manufacturing Co., Ltd. Image transfer apparatus with transfer drum clamping mechanism

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238800A1 (de) * 1992-11-17 1994-05-19 Shinohara Machinery Co Verfahren zum Ausrichten von Druckplatten
DE4223908C2 (de) * 1992-06-30 1995-09-28 Lehner Gmbh Spannvorrichtung zum Spannen und Verstellen einer Druckplatte auf einem Plattenzylinder
DE4439623C2 (de) * 1994-11-05 1999-01-14 Roland Man Druckmasch Verfahren zum automatischen Zuführen von Druckplatten
DE9418049U1 (de) * 1994-11-11 1994-12-22 MAN Roland Druckmaschinen AG, 63075 Offenbach Vorrichtung für das registergerechte Anlegen von Druckplatten
DE19754003C2 (de) * 1997-12-05 2002-09-19 Koenig & Bauer Ag Vorrichtung zur Kontrolle der registergerechten Lage einer Druckplatte
DE19803725A1 (de) * 1998-01-30 1999-08-05 Heidelberger Druckmasch Ag Vorrichtung zur registergenauen Positionierung einer Druckplatte
DE19854845B4 (de) * 1998-01-30 2011-02-24 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zur automatischen Erfassung von mindestens einer Druckplattenkante
DE19803723A1 (de) 1998-01-30 1999-08-05 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur registergenauen Vorpositionierung einer Druckplatte
DE29808099U1 (de) * 1998-05-06 1998-07-09 MAN Roland Druckmaschinen AG, 63075 Offenbach Einrichtung zur Registerkontrolle
DE19957920A1 (de) 1998-12-23 2000-06-29 Heidelberger Druckmasch Ag APW-Induktive Plattenkontrolle
DE10007819A1 (de) 1999-03-10 2000-09-14 Heidelberger Druckmasch Ag Registerbolzen-Taster Vorrichtung zur Erfassung einer Druckplattenlage
DE102007005338B3 (de) * 2007-02-02 2008-04-17 Maschinenfabrik Wifag Rollenrotationsdruckmaschine mit einem Belagspeicher
DE102009002634B4 (de) 2009-04-24 2012-12-27 Koenig & Bauer Aktiengesellschaft Rotationsdruckmaschine mit wenigstens einem Formzylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD69382A (fr) *
US2902929A (en) * 1956-07-20 1959-09-08 Meredith Publishing Company Electronic loose plate detector for printing press
DE1082601B (de) * 1958-10-31 1960-06-02 Kartonagenmaschinenwerk Kama V Vorrichtungen zum Spannen des Gummituches auf Druckzylindern
DE7728905U1 (de) * 1977-09-17 1979-01-04 Register System Gmbh, 8000 Muenchen Vorrichtung zum registerhaltigen ausrichten von druckplatten
DE3000576A1 (de) * 1980-01-09 1981-07-16 Grapho-Metronic Meß- und Regeltechnik GmbH & Co, KG, 8000 München Registersystem fuer druckmaschinen
DE3325583C2 (de) * 1983-07-15 1991-12-12 Heinz 5653 Leichlingen Metje Anschlagsystem für Druckplatten, insbesondere für Druckplattenstanzen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0551976A1 (fr) * 1992-01-17 1993-07-21 Komori Corporation Dispositif pour monter une plaque sur un cylindre porte-plaque
EP0555782A1 (fr) * 1992-02-10 1993-08-18 Komori Corporation Dispositif pour confirmer la condition d'insertion d'une plaque d'impression
US5533451A (en) * 1992-04-13 1996-07-09 Toyo Ink Manufacturing Co., Ltd. Image transfer apparatus with transfer drum clamping mechanism
US5461980A (en) * 1992-07-31 1995-10-31 Komori Corporation Plate mounting apparatus for printing press
DE4226780A1 (de) * 1992-08-13 1994-02-24 Roland Man Druckmasch Vorrichtung zur Kontrolle der registergerechten Anlage einer Druckplatte auf dem Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen
US5394614A (en) * 1992-08-13 1995-03-07 Man Roland Druckmaschinen Ag Apparatus for checking the in-register bearing of a printing plate on the plate cylinder of printing machines
WO1995001874A1 (fr) * 1993-07-07 1995-01-19 Amcor Limited Procede ameliore de reglage de plaques d'imprimerie
US5479859A (en) * 1993-11-12 1996-01-02 Man Roland Druckmaschinen Ag Method and apparatus for controlling the automated changing of printing plates in printing machines

Also Published As

Publication number Publication date
IT8520125A0 (it) 1985-03-28
IT1183507B (it) 1987-10-22
DE3527103C2 (fr) 1987-11-26
EP0195848A3 (en) 1987-12-02
DE3527103A1 (de) 1986-10-09
EP0195848A2 (fr) 1986-10-01

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