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EP1935647A1 - Device for controlling a rotary press for printing a strip of material, and rotary press - Google Patents

Device for controlling a rotary press for printing a strip of material, and rotary press Download PDF

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Publication number
EP1935647A1
EP1935647A1 EP07291549A EP07291549A EP1935647A1 EP 1935647 A1 EP1935647 A1 EP 1935647A1 EP 07291549 A EP07291549 A EP 07291549A EP 07291549 A EP07291549 A EP 07291549A EP 1935647 A1 EP1935647 A1 EP 1935647A1
Authority
EP
European Patent Office
Prior art keywords
printing
copy
printed
rotary press
strip
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.)
Withdrawn
Application number
EP07291549A
Other languages
German (de)
French (fr)
Inventor
Henri Pollet
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.)
Goss International Montataire SA
Original Assignee
Goss International Montataire SA
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 Goss International Montataire SA filed Critical Goss International Montataire SA
Publication of EP1935647A1 publication Critical patent/EP1935647A1/en
Withdrawn legal-status Critical Current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
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/90—Register control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/52—Marks on printed material for registering

Definitions

  • the present invention relates to a device for controlling a rotary press for printing a web of material, of the type comprising a control panel comprising an analysis table intended to receive at least one printed copy to be checked.
  • a rotary press generally comprises, inter alia, a plurality of printing units for printing a strip of continuous material passing through the printing units, and one or more cutting units arranged downstream of the units. of printing, to cut the strip into sheets.
  • the rotary press must be adjusted, in particular to ensure that the images printed on the tape by the different printing units are superimposed properly, and that the tape is cut into appropriate lines between the images.
  • the rotary press comprises, in a manner known per se, actuators for adjusting the position of printing cylinders of the printing units so as to adjust the relative position of the different images printed by the different printing cylinders, and for adjusting the position of transverse cutting cylinders of the band, so as to adjust the position of the cutting lines.
  • An object of the invention is to provide a device for controlling a rotary press for adjusting the press, which is simple to implement, low cost, and easy to use.
  • the invention proposes a control device of the aforementioned type, characterized in that it comprises a detection device capable of providing a measurement of the position of a marker printed on the copy with respect to an element. reference of the copy placed on the analysis table.
  • the invention also relates to a rotary printing press for simplex or recto / verso of a web of material, comprising printing units of a web of material, and at least one transverse cutting unit of the web of material, comprising a control device as defined above.
  • the figure 1 illustrates a rotary press 2 for printing a web 4, for example a paper web.
  • the band 4 passes through the press 2, in tension and at high speed, following a path of movement, from left to right on the figure 1 , as illustrated by the arrow S.
  • the press 2 comprises a plurality of operational units, including successively from upstream to downstream, a unit 6 for feeding the web 4 from a reel, printing units U1, U2, U3, U4. of the strip 4, a unit 8 for drying the strip 4 after printing, a unit 10 for cooling the strip 4 after drying, a unit 12 for longitudinally folding the strip 4, and a unit 14 for transverse cutting of the strip 4.
  • the cutting unit 14 can simultaneously operate a cutting and a transverse folding of the strip 4.
  • the printing units U1, U2, U3, U4 are double for the duplex printing of the strip 4.
  • Each printing unit U1, U2, U3, U4 comprises two printing cylinders 16 arranged on either side of the band 4, and mounted so as to clamp the band between them.
  • the cylinders 16 are supplied with ink in a conventional manner to print the desired images on both sides of the strip 4.
  • the cylinders 16 of a unit U1, U2, U3, U4 print the band 4 and also contribute to driving the band 4.
  • the drying unit 8 comprises means for heating the strip 4 to dry the ink deposited on the strip 4.
  • the cooling unit 10 comprises rolls 26 for deflecting the strip 4.
  • the folding unit 12 comprises, in known manner, a longitudinal folding triangle 28 of the strip 4, and two pairs of rollers for driving the strip 4, comprising an upstream pair and a pair downstream of the triangle 28.
  • the two cylinders 30 of each pair pinch the band 4 between them.
  • the cutting unit 14 comprises two cutting cylinders 31.
  • one of the cylinders 31 carries on its circumference transverse blades, and the other cylinder is provided with grooves for receiving the blades.
  • the band 4 passing between the cylinders 31 is cut between the blades and the grooves along transverse lines.
  • the press 2 comprises devices 32 for driving the cylinders 16, 26, 30 and 31 of the units U1, U2, U3, U4, 10, 12 and 14, and detection devices 34 capable of transmitting signals representative of the position angular and / or angular velocity of said cylinders.
  • the press 2 comprises a control device including a control system 36 connected to the devices 34 for receiving the measurement signals emitted by them, and connected to the devices 32 for synchronizing the rotation of the cylinders 16, 26, 30 and 31 of the units.
  • a control system 36 connected to the devices 34 for receiving the measurement signals emitted by them, and connected to the devices 32 for synchronizing the rotation of the cylinders 16, 26, 30 and 31 of the units.
  • the control device of the press 2 comprises a control station 38 enabling an operator to control and control the printing operations.
  • the station 38 is connected to the control system 36.
  • the printing units U1, U2, U3, U4 print images of different colors.
  • the print colors are black, cyan, magenta, and yellow.
  • the images of the different printing units Us, U2, U3, U4 are superimposed to form a color image. A good superposition of the images printed by the different cylinders is necessary.
  • the press 2 has in known manner in its own actuators (not shown) for adjusting the position of the cylinders 16 of printing units U1, U2, U3, U4.
  • the press 2 comprises actuators for adjusting the position of each cylinder 16 along the rotation shaft of the cylinder which extends transversely to the strip 4 (arrow A).
  • This setting makes it possible to adjust the transverse position of the image printed by each cylinder 16 on the strip 4, and is generally called "lateral register”.
  • the press 2 comprises actuators for adjusting the angular position of each cylinder 16 (arrow B), and in particular the phase shift of each cylinder 16 relative to the other cylinders printing on the same face of the strip 4.
  • An adjustment of the angular phase shift of a cylinder 16, or “circumferential register”, modifies the position of the image printed by this cylinder in the longitudinal direction of the strip 4.
  • the circumferential register of a printing cylinder is for example performed by driving the engine associated with the printing cylinder to advance or delay said cylinder relative to the other printing cylinders.
  • the unit 14 comprises actuators for adjusting the angular phase shift of the rolls 31 with respect to the rolls 16, so as to modify the adjustment of the position of the cross-sectional lines with respect to the images printed on the strip 4 , or "cut register".
  • the control station 38 has a desk 39 comprising an inclined analysis table 40 provided for placing a sheet coming out of the press 2, a horizontal rule 42 placed on the table 40, and a control panel 44.
  • the analysis table 40 allows the operator to place a sheet taken at the outlet of the press 2, after the cutting unit 14, to visually control the correct impression of the strip 4, and, if necessary, provide indications adjusting the different units of the press 2, which will be taken into account by the control system 36 to control the actuators of the press 2, or possibly transmitted by the control system 36 to other operators stationed near the different units , each operator can control and control the setting of one or more units.
  • the console 38 further comprises a detection device 48 for assisting the operator to establish the adjustment indications.
  • the device 48 comprises a camera 50, for example a camera, arranged to capture an image of a sheet placed on the table 40, supported by an edge on the ruler 42.
  • a camera 50 for example a camera
  • the device 48 further comprises an image processing unit 52 able to determine certain measurements from an image captured by the apparatus 50.
  • the device 48 further comprises, optionally, a unit 54 for displaying the measurements.
  • a sheet 56 taken out of the press 2 of the figure 2 has two edges 58 corresponding to the edges longitudinals of the strip 4, and two edges 60 cut in the cutting unit 14.
  • the operator has the sheet 56 supported by a lower edge 60 on the ruler 42, which serves as a position reference for said lower edge 60.
  • the sheet 56 has markings 62 printed in the two corners of the sheets 56 adjacent to the lower edge 60 by the printing units U1, U2, U3, U4, together with an image I.
  • the unit 52 is able to determine from an image taken by the device 50 the distance DC between each marker 62 and the lower edge 60.
  • This distance is representative of the angular phase shift between the cylinders 16, which print the marks 62, and the cylinders 31, which cut the band 4.
  • the measurement of this distance DC makes it possible to adjust the cutting register of the press 2.
  • the device 48 displays the measurement on the unit 54.
  • the operator present at the station 48 can validate the measurement, which is then transmitted to the control system 36 for the purpose of automatic adjustment, or transmission to operators posted. to the different units of the press 2.
  • the marks printed by the different printing cylinders are for example of identical shapes. In this case, as shown on the figures 5 when the rollers 16 are suitably adjusted relative to each other, the marks are substantially perfectly superimposed, so that only one mark 62 is visible.
  • the unit 52 is able to determine the distance DL between the marks 62A, 62B in the longitudinal direction of the band, and the distance DT between the marks 62A, 62B according to the transverse direction of the band.
  • the unit 52 advantageously uses the fact that the marks printed by the different cylinders are of different colors to differentiate them, and associate each mark with a printing cylinder.
  • the marks printed by the different printing cylinders are offset when the print registers are properly adjusted, and the unit 52 is able to differentiate each mark, and to detect a relative position difference of the marks with respect to a relative position of the reference marks.
  • the markers may be of different shapes to distinguish them.
  • the device 48 measures the distance of a marker 62 from an edge 58 of the sheet 56 parallel to a longitudinal edge of the strip 4 or constituting a longitudinal edge of the strip 4, to adjust the register side of each of the printing cylinders, or a printing cylinder serving as a reference for the other printing cylinders, for example the cylinder printing in black.
  • the side register of the rolls is set with reference to the web, and not only relatively between the printing rolls.
  • the device 48 displays the measurement on the unit 54.
  • the operator present at the station 48 can validate the measurement, which is transmitted to the control system 36 for the purpose of automatic adjustment, or transmission to operators posted to the stations. different units of the press 2.
  • the lateral register and the circumferential register of the printing cylinders are adjusted relative to the position of a reference cylinder, for example the cylinder printing in black.
  • the device 48 makes it possible to measure the position of the marks 62 automatically. Thus, the measurements are made faster, more reliable and more accurate than if they were performed manually by an operator using a measuring instrument such as a rule.
  • the use of the device 48 is simple because the operator simply needs to properly place the sheet 56, and the device 48 is therefore able to perform the measurements. Measurements are performed as part of normal print verification operations by the operator.
  • the lateral register, the circumferential register and the cutting register are modified according to the measurements made by the device 48, either automatically by the system 56, or semi-automatically, after validation by the operator of the station 48, and / or transmission to operators posted to press units, and possibly validation by these operators.
  • the semi-automatic setting of the registers thus allows verification by the operator (s).
  • the device 48 is simple and inexpensive. In particular, the device can easily be adapted to a pre-existing press without significant modification of the press 2, since it is sufficient to add the device 48 on a control station that already exists on most of the rotary presses.
  • the device 48 is easier to implement than completely automated adjustment means which would have measuring means arranged along the path of the strip in the press.
  • the device 48 is usable for the settings of the lateral register, the circumferential register and the cutting register, or only for one or two of these registers.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The device has a control device (38) for allowing an operator to control and command the operations of printing. The control device has a control console (39) with an inclined analysis table (40) that receives a printed proof to be controlled. A detection device (48) provides a measurement of the position of a register mark printed on the proof with respect to an edge of the proof presented on the table. The detection device measures the distance between the register mark printed on the proof and the edge. A control system (36) is connected to the detection device to control a rotary press.

Description

La présente invention concerne un dispositif de commande d'une presse rotative d'impression d'une bande de matière, du type comprenant un pupitre de commande comprenant une table d'analyse destinée à recevoir au moins un exemplaire imprimé à contrôler.The present invention relates to a device for controlling a rotary press for printing a web of material, of the type comprising a control panel comprising an analysis table intended to receive at least one printed copy to be checked.

Une presse rotative comprend en général, entre autres, une pluralité d'unités d'impression pour imprimer une bande de matière continue défilant à travers les unités d'impression, et une ou plusieurs unité(s) de découpage, disposées en aval des unités d'impression, pour découper la bande en feuilles.A rotary press generally comprises, inter alia, a plurality of printing units for printing a strip of continuous material passing through the printing units, and one or more cutting units arranged downstream of the units. of printing, to cut the strip into sheets.

La presse rotative doit être réglée, notamment afin d'assurer que les images imprimées sur la bande par les différentes unités d'impression se superposent convenablement, et que la bande soit découpée selon des lignes appropriées entre les images.The rotary press must be adjusted, in particular to ensure that the images printed on the tape by the different printing units are superimposed properly, and that the tape is cut into appropriate lines between the images.

A cet effet, la presse rotative comprend de manière connue en soi des actionneurs pour régler la position de cylindres d'impression des unités d'impression de façon à régler la position relative des différentes images imprimées par les différents cylindres d'impression, et pour régler la position de cylindres de découpage transversal de la bande, de façon à régler la position des lignes de découpage.For this purpose, the rotary press comprises, in a manner known per se, actuators for adjusting the position of printing cylinders of the printing units so as to adjust the relative position of the different images printed by the different printing cylinders, and for adjusting the position of transverse cutting cylinders of the band, so as to adjust the position of the cutting lines.

Néanmoins, les presses rotatives sont des machines très complexes et très coûteuses, et compliquées à réglées.Nevertheless, rotary presses are very complex machines and very expensive, and complicated to set.

Un but de l'invention est de fournir un dispositif de commande d'une presse rotative permettant de régler la presse, qui soit simple à mettre en oeuvre, de coût faible, et simple à utiliser.An object of the invention is to provide a device for controlling a rotary press for adjusting the press, which is simple to implement, low cost, and easy to use.

A cet effet, l'invention propose un dispositif de commande du type précité, caractérisé en ce que qu'il comprend un dispositif de détection apte à fournir une mesure de la position d'un repère imprimé sur l'exemplaire par rapport à un élément de référence de l'exemplaire posé sur la table d'analyse.For this purpose, the invention proposes a control device of the aforementioned type, characterized in that it comprises a detection device capable of providing a measurement of the position of a marker printed on the copy with respect to an element. reference of the copy placed on the analysis table.

Selon d'autres modes de réalisation, le dispositif de commande comprend une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou selon toutes les combinaisons techniquement possibles :

  • il est apte à mesurer la distance entre un repère imprimé sur l'exemplaire et un bord de l'exemplaire formant l'élément de référence de l'exemplaire ;
  • le bord de l'exemplaire est un bord de l'exemplaire résultant de la découpe transversale de la bande dans la presse rotative, le dispositif de détection permettant de régler le registre de coupe de la presse rotative ;
  • le dispositif de détection est apte à détecter la position sur l'exemplaire imprimé d'un repère imprimé sur l'exemplaire par un premier cylindre d'impression par rapport à un autre repère de référence imprimé sur l'exemplaire par un autre cylindre d'impression ;
  • il comprend au moins une règle de positionnement d'un bord de référence de l'exemplaire imprimé sur la table d'analyse.
  • il comprend au moins un système de commande de la presse rotative, relié au dispositif de détection, le système de commande étant apte à recevoir la ou les mesure(s) prise(s) par le dispositif de détection, et à commander des actionneurs d'une presse rotative pour modifier au moins le registre latéral des cylindres d'impression, le registre circonférentiel des cylindres d'impression, et/ou le registre de coupe d'une unité de découpage de la bande.
According to other embodiments, the control device comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • it is able to measure the distance between a mark printed on the copy and an edge of the copy forming the reference element of the copy;
  • the edge of the copy is an edge of the copy resulting from the transverse cutting of the strip in the rotary press, the detection device for adjusting the cutting register of the rotary press;
  • the detection device is able to detect the position on the printed copy of a mark printed on the copy by a first printing cylinder relative to another reference mark printed on the copy by another cylinder of impression ;
  • it comprises at least one rule for positioning a reference edge of the copy printed on the analysis table.
  • it comprises at least one control system of the rotary press, connected to the detection device, the control system being able to receive the measurement (s) taken by the detection device, and to control actuators a rotary press for modifying at least the lateral register of the printing cylinders, the circumferential register of the printing rolls, and / or the cutting register of a cutting unit of the web.

L'invention concerne également une presse rotative d'impression recto ou recto/verso d'une bande de matière, comprenant des unités d'impression d'une bande de matière, et au moins une unité de découpage transversal de la bande de matière, comprenant un dispositif de commande tel que défini ci-dessus.The invention also relates to a rotary printing press for simplex or recto / verso of a web of material, comprising printing units of a web of material, and at least one transverse cutting unit of the web of material, comprising a control device as defined above.

L'invention et ses avantages seront mieux compris à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique d'ensemble d'une presse rotative possédant un dispositif de commande conforme à l'invention ;
  • la figure 2 est une vue schématique partielle et en perspective d'une unité d'impression de la presse rotative de la figure 1 ;
  • la figure 3 est une vue schématique en perspective d'un pupitre de commande du dispositif de commande de la figure 1 ;
  • la figure 4 est une vue partielle de dessus du pupitre de la figure 3 ; et
  • les figures 5 et 6 sont des vues agrandies de la zone V de la figure 4 illustrant des configurations différentes.
The invention and its advantages will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which:
  • the figure 1 is a schematic overview of a rotary press having a control device according to the invention;
  • the figure 2 is a partial schematic view in perspective of a printing unit of the rotary press of the figure 1 ;
  • the figure 3 is a schematic perspective view of a control panel of the control device of the figure 1 ;
  • the figure 4 is a partial view from above of the desk of the figure 3 ; and
  • the Figures 5 and 6 are enlarged views of the V zone of the figure 4 illustrating different configurations.

La figure 1 illustre une presse rotative 2 destinée à imprimer une bande 4, par exemple une bande de papier.The figure 1 illustrates a rotary press 2 for printing a web 4, for example a paper web.

Pendant les opérations d'impression, la bande 4 défile à travers la presse 2, en tension et à grande vitesse, suivant un chemin de défilement, de la gauche vers la droite sur la figure 1, comme illustré par la flèche S.During the printing operations, the band 4 passes through the press 2, in tension and at high speed, following a path of movement, from left to right on the figure 1 , as illustrated by the arrow S.

Dans la suite de la description, les termes « longitudinal », « transversal », « latéral », « amont » et « aval » s'entendent par rapport à la bande 4 et au sens de défilement de la bande 4 dans la presse 2.In the remainder of the description, the terms "longitudinal", "transverse", "lateral", "upstream" and "downstream" refer to the band 4 and to the direction of travel of the band 4 in the press 2 .

La presse 2 comprend une pluralité d'unité opérationnelles, incluant successivement de l'amont vers l'aval, une unité 6 de dévidage de la bande 4 à partir d'une bobine, des unités U1, U2, U3, U4 d'impression de la bande 4, une unité 8 de séchage de la bande 4 après impression, une unité 10 de refroidissement de la bande 4 après séchage, une unité 12 de pliage longitudinal de la bande 4, et une unité 14 de découpage transversal de la bande 4.The press 2 comprises a plurality of operational units, including successively from upstream to downstream, a unit 6 for feeding the web 4 from a reel, printing units U1, U2, U3, U4. of the strip 4, a unit 8 for drying the strip 4 after printing, a unit 10 for cooling the strip 4 after drying, a unit 12 for longitudinally folding the strip 4, and a unit 14 for transverse cutting of the strip 4.

De manière connue en soi, l'unité de découpage 14 peut opérer simultanément un découpage et un pliage transversal de la bande 4.In a manner known per se, the cutting unit 14 can simultaneously operate a cutting and a transverse folding of the strip 4.

Dans l'exemple illustré, les unités d'impression U1, U2, U3, U4 sont double pour l'impression recto/verso de la bande 4.In the illustrated example, the printing units U1, U2, U3, U4 are double for the duplex printing of the strip 4.

Chaque unité d'impression U1, U2, U3, U4 comprend deux cylindres d'impression 16 disposés de part et d'autre de la bande 4, et montés de façon à pincer la bande entre eux. Les cylindres 16 sont alimentés en encre de façon classique pour imprimer les images voulues sur les deux faces de la bande 4.Each printing unit U1, U2, U3, U4 comprises two printing cylinders 16 arranged on either side of the band 4, and mounted so as to clamp the band between them. The cylinders 16 are supplied with ink in a conventional manner to print the desired images on both sides of the strip 4.

Les cylindres 16 d'une unité U1, U2, U3, U4 impriment la bande 4 et contribuent également à entraîner la bande 4.The cylinders 16 of a unit U1, U2, U3, U4 print the band 4 and also contribute to driving the band 4.

L'unité de séchage 8 comprend des moyens de chauffage de la bande 4 pour sécher l'encre déposée sur la bande 4. L'unité de refroidissement 10 comprend des cylindres 26 de déviation de la bande 4.The drying unit 8 comprises means for heating the strip 4 to dry the ink deposited on the strip 4. The cooling unit 10 comprises rolls 26 for deflecting the strip 4.

L'unité de pliage 12 comprend, de manière connue, un triangle 28 de pliage longitudinal de la bande 4, et deux paires de cylindres 30 d'entraînement de la bande 4, comprenant une paire en amont et une paire en aval du triangle 28. Les deux cylindres 30 de chaque paire pincent la bande 4 entre eux.The folding unit 12 comprises, in known manner, a longitudinal folding triangle 28 of the strip 4, and two pairs of rollers for driving the strip 4, comprising an upstream pair and a pair downstream of the triangle 28. The two cylinders 30 of each pair pinch the band 4 between them.

L'unité de découpage 14 comprend deux cylindres de découpage 31. Par exemple, de manière classique, un des cylindres 31 porte sur sa circonférence des lames transversales, et l'autre cylindres est muni de rainures de réception des lames. La bande 4 passant entre les cylindres 31 est découpée entre les lames et les rainures selon des lignes transversales.The cutting unit 14 comprises two cutting cylinders 31. For example, in a conventional manner, one of the cylinders 31 carries on its circumference transverse blades, and the other cylinder is provided with grooves for receiving the blades. The band 4 passing between the cylinders 31 is cut between the blades and the grooves along transverse lines.

La presse 2 comprend des dispositifs 32 d'entraînement des cylindres 16, 26, 30 et 31 des unités U1, U2, U3, U4, 10, 12 et 14, et des dispositifs 34 de détection aptes à émettre des signaux représentatifs de la position angulaire et/ou de la vitesse angulaire desdits cylindres.The press 2 comprises devices 32 for driving the cylinders 16, 26, 30 and 31 of the units U1, U2, U3, U4, 10, 12 and 14, and detection devices 34 capable of transmitting signals representative of the position angular and / or angular velocity of said cylinders.

La presse 2 comprend un dispositif de commande incluant un système de commande 36 relié aux dispositifs 34 pour recevoir les signaux de mesure émis par ceux-ci, et reliée aux dispositifs 32 pour synchroniser la rotation des cylindres 16, 26, 30 et 31 des unités U1, U2, U3, U4, 10, 12 et 14 lors des opérations d'impression.The press 2 comprises a control device including a control system 36 connected to the devices 34 for receiving the measurement signals emitted by them, and connected to the devices 32 for synchronizing the rotation of the cylinders 16, 26, 30 and 31 of the units. U1, U2, U3, U4, 10, 12 and 14 during the printing operations.

Le dispositif de commande de la presse 2 comprend un poste de commande 38 permettant à un opérateur de contrôler et commander les opérations d'impression. Le poste 38 est relié au système de commande 36.The control device of the press 2 comprises a control station 38 enabling an operator to control and control the printing operations. The station 38 is connected to the control system 36.

Pendant les opérations d'impression, les unités d'impression U1, U2, U3, U4 impriment des images de couleurs différentes. Les couleurs d'impression sont les suivantes : noir, cyan, magenta et jaune.During printing operations, the printing units U1, U2, U3, U4 print images of different colors. The print colors are black, cyan, magenta, and yellow.

Les images des différentes unités d'impression Us, U2, U3, U4 se superposent pour former une image en couleur. Une bonne superposition des images imprimées par les différents cylindres est nécessaire.The images of the different printing units Us, U2, U3, U4 are superimposed to form a color image. A good superposition of the images printed by the different cylinders is necessary.

Tel qu'illustré sur la figure 2, la presse 2 possède de manière connue en soi des actionneurs (non représentés) permettant de régler la position des cylindres 16 des unités d'impression U1, U2, U3, U4.As illustrated on the figure 2 , the press 2 has in known manner in its own actuators (not shown) for adjusting the position of the cylinders 16 of printing units U1, U2, U3, U4.

Plus précisément, la presse 2 comprend des actionneurs de réglage de la position de chaque cylindre 16 le long de l'arbre de rotation du cylindre qui s'étend transversalement à la bande 4 (Flèche A). Ce réglage permet de régler la position transversale de l'image imprimée par chaque cylindre 16 sur la bande 4, et est nommé généralement « registre latéral ».More specifically, the press 2 comprises actuators for adjusting the position of each cylinder 16 along the rotation shaft of the cylinder which extends transversely to the strip 4 (arrow A). This setting makes it possible to adjust the transverse position of the image printed by each cylinder 16 on the strip 4, and is generally called "lateral register".

La presse 2 comprend des actionneurs de réglage de la position angulaire de chaque cylindre 16 (Flèche B), et en particulier du déphasage de chaque cylindre 16 par rapport aux autres cylindres imprimant sur la même face de la bande 4.The press 2 comprises actuators for adjusting the angular position of each cylinder 16 (arrow B), and in particular the phase shift of each cylinder 16 relative to the other cylinders printing on the same face of the strip 4.

Un réglage du déphasage angulaire d'un cylindre 16, ou « registre circonférentiel », modifie la position de l'image imprimée par ce cylindre selon la direction longitudinale de la bande 4.An adjustment of the angular phase shift of a cylinder 16, or "circumferential register", modifies the position of the image printed by this cylinder in the longitudinal direction of the strip 4.

Dans le cas d'un presse possédant un moteur individuel associé à chaque cylindre d'impression, ou à chaque paire de cylindres d'impression d'une unité d'impression recto/verso, le registre circonférentiel d'un cylindre d'impression est par exemple effectué par pilotage du moteur associé au cylindre d'impression pour avancer ou retarder ledit cylindre par rapport aux autres cylindres d'impression.In the case of a press having an individual motor associated with each printing cylinder, or each pair of printing cylinders of a duplex printing unit, the circumferential register of a printing cylinder is for example performed by driving the engine associated with the printing cylinder to advance or delay said cylinder relative to the other printing cylinders.

D'une manière analogue, l'unité 14 comprend des actionneurs de réglage du déphasage angulaire des cylindres 31 par rapport aux cylindres 16, de façon à modifier le réglage de la position des lignes de coupe transversale par rapport aux images imprimées sur la bande 4, ou « registre de coupe ».In a similar manner, the unit 14 comprises actuators for adjusting the angular phase shift of the rolls 31 with respect to the rolls 16, so as to modify the adjustment of the position of the cross-sectional lines with respect to the images printed on the strip 4 , or "cut register".

Tel qu'illustré sur la figure 3, le poste de commande 38 possède un pupitre 39 comprenant une table d'analyse inclinée 40 prévue pour poser une feuille sortant de la presse 2, une règle 42 horizontale disposée sur la table 40, et un tableau de commande 44.As illustrated on the figure 3 , the control station 38 has a desk 39 comprising an inclined analysis table 40 provided for placing a sheet coming out of the press 2, a horizontal rule 42 placed on the table 40, and a control panel 44.

La table d'analyse 40 permet à l'opérateur de poser une feuille prélevée en sortie de la presse 2, après l'unité de découpage 14, pour contrôler visuellement la bonne impression de la bande 4, et, si nécessaire, fournir des indications de réglage des différentes unités de la presse 2, qui seront prises en compte par le système de commande 36 pour commander les actionneurs de la presse 2, ou éventuellement transmises par le système de commande 36 à d'autres opérateurs postés à proximité des différentes unités, chaque opérateur pouvant contrôler et commander le réglage d'une ou plusieurs unités.The analysis table 40 allows the operator to place a sheet taken at the outlet of the press 2, after the cutting unit 14, to visually control the correct impression of the strip 4, and, if necessary, provide indications adjusting the different units of the press 2, which will be taken into account by the control system 36 to control the actuators of the press 2, or possibly transmitted by the control system 36 to other operators stationed near the different units , each operator can control and control the setting of one or more units.

Conformément à l'invention, le pupitre 38 comprend en outre un dispositif de détection 48 permettant d'assister l'opérateur en vue d'établir les indications de réglage.According to the invention, the console 38 further comprises a detection device 48 for assisting the operator to establish the adjustment indications.

Le dispositif 48 comprend un appareil 50 de prise de vue, par exemple une caméra, disposé de façon à saisir une image d'une feuille posée sur la table 40, en appui par un bord sur la règle 42.The device 48 comprises a camera 50, for example a camera, arranged to capture an image of a sheet placed on the table 40, supported by an edge on the ruler 42.

Le dispositif 48 comprend en outre une unité 52 de traitement d'image apte à déterminer certaines mesures à partir d'une image saisie par l'appareil 50.The device 48 further comprises an image processing unit 52 able to determine certain measurements from an image captured by the apparatus 50.

Le dispositif 48 comprend en outre, en option, une unité 54 d'affichage des mesures.The device 48 further comprises, optionally, a unit 54 for displaying the measurements.

Tel que représentée sur la figure 4, une feuille 56 prélevée en sortie de la presse 2 de la figure 2, possède deux bords 58 correspondant aux bords longitudinaux de la bande 4, et deux bords 60 découpés dans l'unité de découpage 14.As shown on the figure 4 , a sheet 56 taken out of the press 2 of the figure 2 has two edges 58 corresponding to the edges longitudinals of the strip 4, and two edges 60 cut in the cutting unit 14.

L'opérateur dispose la feuille 56 en appui par un bord 60 inférieur sur la règle 42, qui sert de référence de position pour ledit bord 60 inférieur.The operator has the sheet 56 supported by a lower edge 60 on the ruler 42, which serves as a position reference for said lower edge 60.

La feuille 56 possède des repères 62 imprimés dans les deux coins de la feuilles 56 adjacents au bord 60 inférieur par les unités d'impression U1, U2, U3, U4, en même temps qu'une image I.The sheet 56 has markings 62 printed in the two corners of the sheets 56 adjacent to the lower edge 60 by the printing units U1, U2, U3, U4, together with an image I.

L'unité 52 est apte à déterminer à partir d'une image prise par l'appareil 50 la distance DC entre chaque repère 62 et le bord 60 inférieur.The unit 52 is able to determine from an image taken by the device 50 the distance DC between each marker 62 and the lower edge 60.

Cette distance est représentative du déphasage angulaire entre les cylindres 16, qui impriment les repères 62, et les cylindres 31, qui coupent la bande 4. La mesure de cette distance DC permet de régler le registre de coupe de la presse 2.This distance is representative of the angular phase shift between the cylinders 16, which print the marks 62, and the cylinders 31, which cut the band 4. The measurement of this distance DC makes it possible to adjust the cutting register of the press 2.

Le dispositif 48 affiche la mesure sur l'unité 54. L'opérateur présent au poste 48 peut valider la mesure, qui est alors transmise au système de commande 36 en vue d'un réglage automatique, ou d'une transmission à des opérateurs postés aux différentes unités de la presse 2.The device 48 displays the measurement on the unit 54. The operator present at the station 48 can validate the measurement, which is then transmitted to the control system 36 for the purpose of automatic adjustment, or transmission to operators posted. to the different units of the press 2.

Les repères imprimés par les différents cylindres d'impression sont par exemple de formes identiques. Dans ce cas, tel que représenté sur la figures 5, lorsque les cylindres 16 sont convenablement réglés les uns par rapport aux autres, les repères sont sensiblement parfaitement superposés, de sort qu'un seul repère 62 soit visible.The marks printed by the different printing cylinders are for example of identical shapes. In this case, as shown on the figures 5 when the rollers 16 are suitably adjusted relative to each other, the marks are substantially perfectly superimposed, so that only one mark 62 is visible.

Tel que représenté sur la figure 6, si un repère 62A et décalé par rapport à un repère 62B, l'unité 52 est apte déterminer la distance DL entre les repères 62A, 62B suivant la direction longitudinale de la bande, et la distance DT entre les repères 62A, 62B suivant la direction transversale de la bande.As shown on the figure 6 if a mark 62A and offset from a mark 62B, the unit 52 is able to determine the distance DL between the marks 62A, 62B in the longitudinal direction of the band, and the distance DT between the marks 62A, 62B according to the transverse direction of the band.

L'unité 52 utilise avantageusement le fait que les repères imprimés par les différents cylindres sont de couleurs différents pour les différencier, et associer chaque repère à un cylindre d'impression.The unit 52 advantageously uses the fact that the marks printed by the different cylinders are of different colors to differentiate them, and associate each mark with a printing cylinder.

En variante, les repères imprimés par les différents cylindres d'impression sont décalés lorsque les registres d'impression sont convenablement réglés, et l'unité 52 est aptes à différencier chaque repère, et à détecter une différence de position relative des repères par rapport à une position relative des repères de référence.Alternatively, the marks printed by the different printing cylinders are offset when the print registers are properly adjusted, and the unit 52 is able to differentiate each mark, and to detect a relative position difference of the marks with respect to a relative position of the reference marks.

En option ou en alternative, les repères peuvent être de formes différentes pour les distinguer.Optionally or alternatively, the markers may be of different shapes to distinguish them.

En option ou en alternative, le dispositif 48 mesure la distance d'un repère 62 par rapport à un bord 58 de la feuille 56 parallèle à un bord longitudinal de la bande 4 ou constituant un bord longitudinal de la bande 4, pour régler le registre latéral de chacun des cylindres d'impression, ou d'un cylindre d'impression servant de référence aux autres cylindres d'impression, par exemple le cylindre imprimant en noir. Ainsi, le registre latéral des cylindres est réglé par référence à la bande, et non seulement relativement entre les cylindres d'impression.Optionally or alternatively, the device 48 measures the distance of a marker 62 from an edge 58 of the sheet 56 parallel to a longitudinal edge of the strip 4 or constituting a longitudinal edge of the strip 4, to adjust the register side of each of the printing cylinders, or a printing cylinder serving as a reference for the other printing cylinders, for example the cylinder printing in black. Thus, the side register of the rolls is set with reference to the web, and not only relatively between the printing rolls.

Le dispositif 48 affiche la mesure sur l'unité 54. L'opérateur présent au poste 48 peut valider la mesure, qui est transmise au système de commande 36 en vue d'un réglage automatique, ou d'une transmission à des opérateurs postés aux différentes unités de la presse 2.The device 48 displays the measurement on the unit 54. The operator present at the station 48 can validate the measurement, which is transmitted to the control system 36 for the purpose of automatic adjustment, or transmission to operators posted to the stations. different units of the press 2.

Avantageusement, le registre latéral et le registre circonférentiel des cylindres d'impression sont réglés par rapport à la position d'un cylindre de référence, par exemple le cylindre imprimant en noir.Advantageously, the lateral register and the circumferential register of the printing cylinders are adjusted relative to the position of a reference cylinder, for example the cylinder printing in black.

Le dispositif 48 permet d'effectuer les mesures de position des repères 62 de façon automatique. Ainsi, les mesures sont effectuées de façon plus rapide, plus fiable et plus précise que si elles étaient effectuées manuellement par un opérateur à l'aide d'un instrument de mesure tel qu'une règle.The device 48 makes it possible to measure the position of the marks 62 automatically. Thus, the measurements are made faster, more reliable and more accurate than if they were performed manually by an operator using a measuring instrument such as a rule.

L'utilisation du dispositif 48 est simple car l'opérateur doit simplement poser convenablement la feuille 56, et le dispositif 48 est dès lors apte à effectuer les mesures. Les mesures sont effectuées dans le cadre d'opérations normales de vérification de l'impression par l'opérateur.The use of the device 48 is simple because the operator simply needs to properly place the sheet 56, and the device 48 is therefore able to perform the measurements. Measurements are performed as part of normal print verification operations by the operator.

Le registre latéral, le registre circonférentiel et le registre de coupe sont modifiés en fonction des mesures effectuées par le dispositif 48, soit automatiquement par le système 56, soit de façon semi-automatique, après validation par l'opérateur du poste 48, et/ou transmission à des opérateurs postés aux unités de la presse, et éventuellement validation par ces opérateurs. Le réglage semi-automatique des registres permet ainsi une vérification par le ou les opérateur(s).The lateral register, the circumferential register and the cutting register are modified according to the measurements made by the device 48, either automatically by the system 56, or semi-automatically, after validation by the operator of the station 48, and / or transmission to operators posted to press units, and possibly validation by these operators. The semi-automatic setting of the registers thus allows verification by the operator (s).

Le dispositif 48 est simple et peu coûteux. En particulier, le dispositif peut facilement être adapté sur une presse pré-existante sans modification important de la presse 2, puisqu'il suffit d'ajouter le dispositif 48 sur un poste de commande qui existe par ailleurs déjà sur la plupart des presses rotatives.The device 48 is simple and inexpensive. In particular, the device can easily be adapted to a pre-existing press without significant modification of the press 2, since it is sufficient to add the device 48 on a control station that already exists on most of the rotary presses.

Le dispositif 48 est plus simple à mettre en oeuvre que des moyens complètement automatisés de réglage qui posséderaient des moyens de mesure disposés le long du chemin de la bande dans la presse.The device 48 is easier to implement than completely automated adjustment means which would have measuring means arranged along the path of the strip in the press.

Le dispositif 48 est utilisable pour les réglages du registre latéral, du registre circonférentiel et du registre de coupe, ou seulement pour un ou deux de ces registres.The device 48 is usable for the settings of the lateral register, the circumferential register and the cutting register, or only for one or two of these registers.

Claims (7)

Dispositif de commande d'une presse rotative d'impression d'une bande de matière, du type comprenant un pupitre de commande (38) comprenant une table d'analyse (40) destinée à recevoir au moins un exemplaire imprimé à contrôler,
caractérisé en ce qu'il comprend un dispositif de détection (48) apte à fournir une mesure de la position d'un repère (62) imprimé sur l'exemplaire par rapport à un élément de référence (62, 60) de l'exemplaire posé sur la table d'analyse (40).Device for controlling a rotary press for printing a strip of material, of the type comprising a control panel (38) comprising an analysis table (40) intended to receive at least one printed copy to be inspected,
characterized in that it comprises a detection device (48) capable of providing a measurement of the position of a reference mark (62) printed on the copy with respect to a reference element (62, 60) of the copy placed on the analysis table (40). Dispositif selon la revendication 1, caractérisé en ce que le dispositif de détection (48) est apte à mesurer la distance entre un repère (62) imprimé sur l'exemplaire et un bord (60) de l'exemplaire formant l'élément de référence de l'exemplaire.Device according to claim 1, characterized in that the detection device (48) is able to measure the distance between a mark (62) printed on the copy and an edge (60) of the copy forming the reference element of the copy. Dispositif selon la revendication 2, caractérisé en ce que le bord de l'exemplaire est un bord (60) de l'exemplaire résultant de la découpe transversale de la bande (4) dans la presse rotative, le dispositif de détection (48) permettant de régler le registre de coupe de la presse rotative.Device according to claim 2, characterized in that the edge of the copy is an edge (60) of the copy resulting from the transverse cutting of the strip (4) in the rotary press, the detection device (48) allowing to set the cutting register of the rotary press. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de détection (48) est apte à détecter la position sur l'exemplaire imprimé d'un repère (62B) imprimé sur l'exemplaire par un premier cylindre d'impression par rapport à un autre repère (62A) de référence imprimé sur l'exemplaire par un autre cylindre d'impression.Device according to any one of the preceding claims, characterized in that the detection device (48) is able to detect the position on the printed copy of a mark (62B) printed on the copy by a first cylinder of printing relative to another reference mark (62A) printed on the copy by another printing cylinder. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend au moins une règle (42) de positionnement d'un bord (60) de référence de l'exemplaire imprimé sur la table d'analyse (40).Device according to any one of the preceding claims, characterized in that it comprises at least one rule (42) for positioning a reference edge (60) of the printed copy on the analysis table (40). Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend au moins un système de commande (36) de la presse rotative, relié au dispositif de détection (48), le système de commande (36) étant apte à recevoir la ou les mesure(s) prise(s) par le dispositif de détection (48), et à commander des actionneurs (32) d'une presse rotative pour modifier au moins le registre latéral des cylindres d'impression, le registre circonférentiel des cylindres d'impression, et/ou le registre de coupe d'une unité de découpage de la bande.Device according to any one of the preceding claims, characterized in that it comprises at least one control system (36) of the rotary press, connected to the detection device (48), the control system (36) being able to receiving the measurement (s) taken by the detection device (48), and controlling actuators (32) of a rotary press to modify at least the lateral register of the printing cylinders, the circumferential register printing cylinders, and / or the cutting register of a cutting unit of the web. Presse rotative d'impression recto ou recto/verso d'une bande de matière, comprenant des unités d'impression d'une bande de matière, et au moins une unité de découpage transversal de la bande de matière, caractérisé en ce qu'elle comprend un dispositif de commande selon l'une quelconque des revendications précédentes.A rotary printing press for single-sided or double-sided printing of a web of material, comprising printing units of a web of material, and at least one unit cross-cutting of the web of material, characterized in that it comprises a control device according to any one of the preceding claims.
EP07291549A 2006-12-21 2007-12-18 Device for controlling a rotary press for printing a strip of material, and rotary press Withdrawn EP1935647A1 (en)

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