EP1708887A2 - Procedes pour compenser un allongement transversal et/ou un allongement longitudinal d'une matiere d'impression et machine a imprimer comportant plusieurs groupes d'impression produisant une image imprimee sur une matiere d'impression - Google Patents

Procedes pour compenser un allongement transversal et/ou un allongement longitudinal d'une matiere d'impression et machine a imprimer comportant plusieurs groupes d'impression produisant une image imprimee sur une matiere d'impression

Info

Publication number
EP1708887A2
EP1708887A2 EP05707820A EP05707820A EP1708887A2 EP 1708887 A2 EP1708887 A2 EP 1708887A2 EP 05707820 A EP05707820 A EP 05707820A EP 05707820 A EP05707820 A EP 05707820A EP 1708887 A2 EP1708887 A2 EP 1708887A2
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
print image
printing machine
forme cylinder
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Withdrawn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
EP05707820A
Other languages
German (de)
English (en)
Inventor
Günther Oskar ECKERT
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1708887A2 publication Critical patent/EP1708887A2/fr
Withdrawn legal-status Critical Current

Links

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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/16—Registering devices with means for displacing the printing formes on the cylinders
    • 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
    • B41P2227/40—Adjusting means for printing plates on the cylinder
    • 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
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the invention relates to methods for compensating for a transverse expansion and / or a longitudinal expansion of a printing material and to a printing press with a plurality of printing units producing at least one print image on a printing material according to the preamble of claim 1, 3 or 5.
  • the invention has for its object to provide methods for compensating for a transverse expansion and / or a longitudinal expansion of a printing material and a printing press with a plurality of printing units producing at least one print image on a printing material.
  • the advantages that can be achieved with the invention consist in particular in that a transverse expansion of the printing material is compensated very comprehensively.
  • an image controller controlled by a control unit reduces the width of the printing material in a way that counteracts the transverse expansion.
  • the control unit preferably takes into account further factors influencing the transverse expansion and controls the actuation of further devices, in particular in or on the cylinders, in order to counteract the effects of the “fan-out effect”.
  • Figure 1 is a schematic representation of a printing machine suitable for multi-color printing with four printing units each with two printing units.
  • Figure 2 is a schematic representation of four form cylinders arranged one after the other with printing forms with print image locations; v
  • FIG. 3 shows a printing unit with print images producing on a printing material
  • Fig. 4 shows a holding device arranged in the channel of a forme cylinder.
  • Fig. 1 shows in a highly simplified form schßmatisch a printing machine 01, preferably a printing machine 01 printing several different printing inks, z. B. a newspaper printing press 01, with z. B. four vertically arranged printing units 02, a printing material 03, z. B. a material web 03, in particular a paper web 03, passes through the printing units 02 one after the other in the vertical direction.
  • a production flow P of the printing substrate 03 running through the printing press 01 is assumed in this example essentially from bottom to top.
  • a printing unit 04 with an ink-transferring cylinder 06 and a forme cylinder 07 (cylinder 07) rolling on the ink-transferring cylinder are arranged in each printing unit 02 for the perfecting and printing on both sides of the paper web 03 ,
  • an inking unit, a dampening unit and other modules belonging to each printing unit 04 are omitted here, since these are not necessary to explain the invention.
  • the ink transfer cylinders 06 are preferably designed as transfer cylinders 06 operating in the offset printing process, the transfer cylinders 06 preferably having an elastic surface, the elastic surface being e.g. B. is formed by at least one arranged on the outer surface of the transfer cylinder 06 blanket made of an elastomeric material.
  • the transfer cylinders 06 arranged in each printing unit 02 on both sides of the paper web 03 are positioned against one another in a so-called rubber-rubber arrangement, so that the transfer cylinders 06 arranged in the same printing unit 02 mutually function as an impression cylinder.
  • two adjacent printing units 02 can be combined to form a satellite printing unit, the printing units 04 of these printing units 02 being moved around a common one of the other cylinders 06; 07 separate impression cylinders are arranged, the paper web 03 being guided between the impression cylinder and at least one transfer cylinder 06 positioned on the impression cylinder.
  • the printing press 01 can provide that the printing press 01 z. B. as a commercial printing press 01 with a preferably in Mainly horizontal guidance of the printing substrate 03 is formed, wherein in the printing press 01 along the production flow P of the printing substrate 03 passing through the printing press 01, preferably two successive printing units 04 are provided on both sides, ie below and above the printing substrate 03, the transfer cylinders 06 being two in a printing unit 02 arranged printing units 04 in turn z. B. in a rubber-rubber arrangement against each other, the printing material 03 is passed between the two opposing transfer cylinders 06, so that the printing material 03 passes through their mutual rolling area.
  • the forme cylinders 07 assigned to the transfer cylinders 06 each have at least one printing form 08 on their outer surface (FIG. 2).
  • the forme cylinders 07 are preferably covered with a plurality of printing formes 08 in their axial direction X and / or in their circumferential direction Y.
  • the forme cylinders 07 are each provided with six printing formes 08 in their axial direction X and with two printing forms 08 in their circumferential direction Y, so that twelve printing forms 08 are then arranged on each form cylinder 07.
  • FIG. 2 schematically shows a development of such forme cylinders 07, each with twelve printing forms 08, the directional arrows X; Y • '1+ indicate the axial direction X to the forme cylinder 07 and the circumferential direction Y of the forme cylinder 07.
  • each printing form 08 has at least one print image point 09 (FIG. 2).
  • the printing plates 08 have a plurality of printing image points 09 in the direction X of the forme cylinder 07 and / or in the circumferential direction Y of the forme cylinder 07.
  • 3 shows, by way of example, the generation of six print images 11 in the direction X axial to the forme cylinder 07 on the printing substrate 03.
  • six print image points 09 and / or in the circumferential direction Y of the forme cylinder 07 z. B. has two print image points 09.
  • Each printing form 08 can also have only a single printing image point 09.
  • the printing units 04 which are arranged one after the other on the same side of the printing substrate 03 in its production flow P, print printing ink with different color tones. For example, four color dots 04 of the color tones black, cyan, magenta and yellow which are common in four-color printing are printed in four successive printing units, and 04 color dots of one of these color tones in each of these printing units.
  • a multicolored print image 11 is generated in that several color separations, e.g. B.
  • the color tones of black, cyan, magenta and yellow each corresponding - four color separations are printed on the printing substrate 03 one above the other, the color dots of the individual color separations relating to the same printing image 11 are arranged on the printing substrate 03 next to one another or one above the other so that the multicolored printing image 11 results from a color mixture of the color dots resulting from the different color separations.
  • Each print image point 09 has a width B in the axial direction X of the forme cylinder 07 and a length L in the circumferential direction Y of the forme cylinder 07.
  • Print image points 09 representing a color separation for generating a common print image 11 are arranged one behind the other in the production flow P of the printing substrate 03
  • Printing units 04 with their respective cylinders 06 transferring from the forme cylinder 07 printing ink to one another precisely. Compliance with this condition, which is necessary for a good printing result, is made more difficult by the fact that the printing substrate 03 has a longitudinal expansion and / or a transverse expansion transverse to the production flow P from a cylinder 06 transferring an ink to a cylinder 06 following in the production flow P and / or transversely to the production flow P.
  • the longitudinal expansion and / or the transverse expansion of the printing material 03 result, for. B. that the substrate 03 from the dampening unit of the printing press 01 absorbs moisture and / or moisture from the printing ink and / or moisture from the air surrounding the substrate 03, and / or from a mechanical expansion of the substrate 03 as it passes through several of each other subsequently arranged printing units 04.
  • Such a longitudinal expansion and / or the transverse expansion of the printing substrate 03 is known under the term “fan-out”.
  • the change in dimension expressing that the length L of two print image points 09 which follow one another in the production flow P of the printing material 03 by a factor FL and / or the width B of two printing image points 09 which follow one another in the production flow P of the printing material 03 distinguish a factor FB from each other.
  • the factors FL; FB a relative dimensional change z. B. in percent based on an original length L or width B or an absolute dimensional change z. B. in the form of a change amount based on an original length L or width B.
  • Each printed image point 09 defines a surface limited by its length L and width B (FIG. 2), the surface of a printed image point 09 arranged on a forme cylinder 07 being curved and the curvature of which is adapted to the course of the lateral surface of the forme cylinder 07 in its circumferential direction Y. ,
  • the surface has a center of gravity S at the intersection of its diagonals (shown in broken lines in FIG. 2).
  • a position (X1; Y1) of the center of gravity S of this print image point 09 can also be compared to a position (X2; Y2) of a print image point 09 correlating with the common print image 11 on one in the production flow P of the printing material 03 differentiate subsequent forme cylinders 07, these print image locations 09 preferably each being arranged on a printing form 08, the printing forms 08 being in the position (X1; Y1); (X2; Y2) of their centers of gravity S distinguishing printed image areas 09 are arranged on their respective forme cylinder 07 at the same position.
  • the printing forms 08 carrying the print image locations 09 thus remain stationary on their respective forme cylinders 07, whereas only the position (X1; Y1); (X2; Y2) at least one of the focal points S is shifted from two print image points 09 which follow one another in the production flow P of the printing substrate 03, so that only the positions (X1; Y1); (X2; Y2) the focal points S of these print image points 09 z. B. by a distance W relative to each other (Fig. 2) without changing the position of a printing form 08 on its respective forme cylinder 07.
  • the distance W lies within the same plane of the area spanned by the length L and width B of the printed image point 09 and can in this plane shift the center of gravity S compared to the position (X1; Y1) of the spot S of the reference printed image point 09 each have any direction.
  • the length L of two printed image points 09 arranged next to one another on the same forme cylinder 07 in its axial direction X can be influenced by a factor FL and / or differentiate the width B of two printed image points 09 arranged next to one another on the same forme cylinder 07 in its axial direction X by a factor FB.
  • the factor FL relating to the length L of the printed image point 09 is dependent on a factor DL of the longitudinal expansion and the factor FB relating to the width B of the printed image point 09 is dependent on a factor DQ of the transverse expansion, the factor DL the longitudinal expansion and the factor DQ of the transverse expansion z.
  • the length L of the printed image point 09 is preferably increased by the factor DL of the longitudinal expansion and the width B of the printed image point 09 by the factor DQ of the transverse expansion.
  • the factor DL of the longitudinal expansion and / or the factor DQ of the transverse expansion can be variable, the variability being able to relate to further parameters, in particular parameters relating to operating conditions of the printing press 01 and properties of the printing material 03, such as, for example, B. on the production speed of the printing press 01 or on the temperature of the air surrounding the printing material 03 and in particular the moisture content of this air.
  • the factor DL of the longitudinal expansion and / or the factor DQ of the transverse expansion can take into account that z. B. the transverse expansion for with respect to the forme cylinder 07 near the face "outer" printed image areas 09 affects more than near the middle of the Forme cylinders 07 arranged "inner" print image points 09, provided, for example, that a center line M bisecting the cylinder length applies as a reference or reference mark M for the transverse expansion (FIG. 2).
  • the factor FL distinguishing the length L can also be used in the production flow P of the Printing material 03 of successive print image points 09 and / or the factor FB differentiating the width B of two successive print image points 09 in the production flow P of the printing material 03 may depend on the arrangement of that printing unit 04 in the production flow P of the printing material 03 in which the forme cylinder 07 with the printing form 08 is arranged with the printed image point 09 with the length L and / or width B changed by the factor FL; FB, because it affects the value of the factors FL; FB whether the printed image points 09 are immediately following printing units 04 or further apart lying printing units 04 are compared with each other.
  • the position (X1; Y1) of the center of gravity S of a print image point 09 differs from the position (X2; Y2) of the focus point S of another print image point 09 arranged on the same forme cylinder 07 in its axial direction X, whereby these comparative print image points 09 have the same length L and width B, the print image points 09 arranged next to one another on the same forme cylinder 07 being arranged in each case on a printing form 08, the print forms 08 arranged on the same forme cylinder 07 having the positions (X1; Y1); (X2; Y2) of their welding points S differentiating printing image points 09 are arranged in alignment in the axial direction X of the respective forme cylinder 07.
  • B. is pivotally mounted in a groove 29.
  • the guide element 34 can be arranged on a support element 37 which is supported on a wall 36 of the channel 13.
  • the opening 14 has a slot width V, preferably less than 5 mm, on the lateral surface 12 of the forme cylinder 07, the slot width V being in particular between 1 mm and 3 mm.
  • the holding device 27, the adjusting means 32 and the spring element 33 form, in the example shown, essential elements of a holding device for holding one or more printing forms 08 on the lateral surface 12 of a forme cylinder 07.
  • At least one register pin (not shown) arranged in at least one forme cylinder 07 may be provided in the opening 14, the register pin aligning at least one printing forme 08 arranged on the forme cylinder 07 in the axial direction X to the forme cylinder 07.
  • the holding device or the register pin are designed for their interaction with at least one printing form 08 and can z. B. in dependence on the factor DQ of transverse expansion, preferably in a ratio proportional to the behavior of the factor DQ of transverse expansion, in the axial direction X of the forme cylinder 07.
  • the forme cylinder 07 for. B.
  • each printing form 08 is assigned at least one holding device or at least one register pin. It is advantageous if each printing form 08 is individually displaceable in the axial direction X relative to the forme cylinder 07.
  • the entire forme cylinder 07 can be displaced in its axial direction X, as a result of which all printing forme 08 arranged on it are displaced equally.
  • the displacement takes place transversely to the production flow P of the printing substrate 03 and relative to the printing substrate 03, ie relative to a reference mark M of the printing substrate 03, the reference mark M z. B. the center line M of Printing material 03 can be (Fig. 2).
  • the reference mark M can, however, also be located at a different location on the printing material 03, for. B. on one of its side edges.
  • the displacement of the printing forms 08 which is directed transversely to the production flow P of the printing material 03, can also relate to a stationary frame of the printing machine 01 instead of to the printing material 03.
  • the forme cylinder 07 and / or the ink transfer cylinder 06 at least one of two successive printing units 04 are preferably of a controllable drive (not shown), for. B. driven by an electric motor, in particular by a frequency-controlled motor. Provision can also be made for the forme cylinder 07 and / or the cylinder 06 transferring the printing ink to be driven individually in each of the printing units 04 arranged one after the other. If controllable drives are used, a phase position of the forme cylinders 07 and / or the cylinders 06 of at least two printing units 04 that transfer the printing ink can preferably be controlled as a function of the factor DL of the longitudinal expansion. In particular, a circumferential register of the forme cylinders 07 can be influenced with the controllable phase position of the forme cylinders 07 and / or the cylinders 06 that transfer printing ink.
  • the actuator and / or the phase position of the forme cylinders 07 and / or the cylinders 06 that transfer the printing ink are preferably continuously controllable.
  • the actuator and / or the phase position of the forme cylinder 07 and / or the cylinder 06 transferring printing ink can preferably be controlled in the running production flow P of the printing substrate 03.
  • the actuator and / or the drives and / or the phase position of the forme cylinder 07 and / or the ink transferring cylinder 06 are e.g. B. controllable from a control station assigned to the printing press 01 or from another central control unit, d. H. they can be controlled remotely.
  • the memory each having at least one value for the factor FL of the length L of two successive print image points 09 in the production flow P of the printing material 03 and / or at least one value for the factor FB of the width B of two in the production flow P of the printing material 03 each other subsequent print image points 09 contains.
  • the memory can in each case contain at least one value for the factor FL of the length L of two print image points 09 arranged side by side on the same forme cylinder 07 and / or at least one value for the factor FB of the width B of two print image points 09 arranged next to one another on the same forme cylinder 07.
  • the memory can each have at least one value for the different positions (X1; Y1); (X2; Y2) of the welding point S of two print image points 09 which follow one another in the production flow P of the printing substrate 03 or at least one value for the different positions (X1; Y1); (X2; Y2) of the welding point S of two printed image points 09 arranged side by side on the same forme cylinder 07.
  • the control unit controls at least the actuator and / or the phase position of the forme cylinder 07 and / or the cylinder 06 that transfers the printing ink, preferably as a function of the value stored in the memory for the factor FL and / or the factor FB and / or the positions (X1; Y1); (X2; Y2) of the center of gravity S.
  • the focal point SB of the print image 11 to be printed is, for. B.
  • a detection device connected to the control unit e.g. B. a optically capturing the print image 11 and digitally evaluating device, for. B. a semiconductor camera with a CCD sensor.
  • the control unit actuates devices connected to it in such a way that the welding point S of the print image points printing a common print image 11 09 is brought into line with the center of gravity SB of the printed image 11 to be printed.
  • Methods proposed here to compensate for the longitudinal expansion and / or the transverse expansion of the printing material 03 provide, and preferably take precedence over a displacement of at least one printing form 08 on one of the forme cylinders 07, the displacement taking place relative to a reference mark M on the printing material 03 that the length L of at least one print image point 09 of a printing form 08 compared to the length L of a print image point 09 correlating with the same print image 11 of another printing form 08 arranged on another forme cylinder 07 by the factor FL and / or the width B of at least one printing image point 09 of a printing form 08 is changed by a factor of FB compared to the width B of a print image point 09 correlating with the same print image 11 of another print form 08 arranged on another forme cylinder 07.
  • the position (X1; Y1) of a center of gravity S of at least one print image point 09 of a printing form 08 becomes compared to the position (X2; Y2) of the focus point S of a print image point 09 correlating with the same print image 11, on a different forme cylinder 07 on the same Position of the forme cylinder 07 arranged other printing form 08 changed.
  • the length L and / or the width B and / or the position (X1; Y1); (X2; Y2) of the welding point S of the printed image point 09 is preferably changed using the factor DL of the longitudinal expansion and / or the factor DQ of the transverse expansion.
  • the length L and / or the width B and / or the position (X1; Y1) are also changed; (X2; Y2) of the welding point S of the print image point 09 preferably as a function of the position of the printing form 08 on the forme cylinder 07, specifically that forme cylinder 07 on which the printing form 08 with the changed print image point 09 is arranged.
  • a value for the factor FL changing the length L is preferably dependent on the factor DL of the longitudinal expansion and a value for the factor B changing the length B.
  • the FB factor is preferably determined as a function of the DQ factor of the transverse expansion.
  • the value for the factor FL changing the length L and / or the value for the factor FB changing the width B and / or the coordinates for a new position (X1; Y1); (X2; Y2) of the spot S of the print image point 09 of the printing form 08 on one of the forme cylinders 07 can also be determined as a function of the print image point 09 of another printing form 08 arranged on the same position of the forme cylinder 07 on another forme cylinder 07.
  • a change in the length L and / or the width B of a print image point 09 or a change in the position (X1; Y1); (X2; Y2) of its center of gravity S to compensate for a part of the longitudinal expansion and / or the transverse expansion known at the time of imaging of the printing form 08 is preferably carried out in that on a forme cylinder 07 with a printing form 08 with a print image point 09 to be changed at the same position of the forme cylinder 07, a printing form 08 is arranged with the print image point 09 changed in its aforementioned parameters.
  • at least part of the compensation of the "fan-out effect" takes place in connection with the imaging of the printing form 08, ie when the printing image point 09 is created.
  • the change accordingly relates to a change in the dimension and / or the position of the print image location 09 on a printing form 08, as a result of which systematic deviations to be expected between at least two print image locations 09 are compensated for.
  • This changes the position of the printing form 08 on the Forme cylinder 07 is often no longer required or only required for fine adjustment or for tracking during the ongoing printing process.
  • parameters known or ascertainable in advance such as, for B. the factor DL of the longitudinal expansion and / or the factor DQ of the transverse expansion of the printing material 03 fed to an imaging system, wherein the imaging system is preferably controlled by a computer and, based on a digital data record, the print image point 09 z. B. with a laser on the printing form 08.
  • the imaging system accordingly creates the print image point 09 on a printing form 08 in accordance with the specifications provided and thus compensates for the expected effects of a "fan-out effect".
  • the imaging system images the printing form 08, in particular depending on the color of the ink transferring cylinder 06 and / or of the arrangement of the printing group 04 with the forme cylinder 07 carrying the printing forme 08 in the production flow P of the printing material 03 and / or of the position of the printing forme 08 arranged on the forme cylinder 07.
  • the imaging system therefore takes its position into account when creating a printing image location 09 a printing form 08, this position '** is usually determined by an occupancy plan created in a prepress stage ..
  • the imaging system Based on the position of the printing form 08 on one of the forme cylinders 07 required by the occupancy plan, the imaging system then fits at least some print image locations 09, preferably each printed image point 09 in a further printing unit 04 following a first printing unit 04, in its length L and / or width B and / or in the position of its center of gravity S depending on the influencing variables mentioned to be taken into account when producing the same printing image 11 in order to counteract the systematic deviations to be expected in the running printing process and to compensate them as far as possible by means of a suitable design and / or arrangement, ie positioning of the printed image point 09.
  • a desired value for the factor FL changing the length L and / or a desired value for the factor FB changing the width B and / or a desired value for the position of the center of gravity S of the print image point 09 of a printing form 08 to be changed determined by relevant parameters for the changes mentioned z. B. recorded during the ongoing printing process and adjusted in value.
  • a printing form 08 with the changed print image point 09 can then be arranged on at least one of the forme cylinders 07 if an actual value for the factor FL changing the length L and / or an actual value for the factor FB changing the width B and / or an actual value for the position to be changed (X1; Y1); (X2; Y2) of the welding point S of the print image point 09 of a printing form 08 exceeds a permissible deviation from the determined target values.
  • it is necessary to create a printing form 08 with a changed print image location 09 and to replace it on the relevant form cylinder 07 which can mean an interruption in the printing process.
  • the setpoints are e.g. B. determined for each hue that an ink-transferring cylinder 06 transmits.
  • the target values are determined for each forme cylinder 07 of the printing units 04 which follow one another in the production flow P of the printing substrate 03 and / or for each position of a printing forme 08 arranged on one of the forme cylinders 07.
  • the determined target values are preferably stored in a memory and, if necessary, made available to the imaging system.
  • the transverse expansion of the printing substrate 03 can be counteracted by using an image regulator 38 (FIG. 1), the printing substrate 03 preferably deforming in a wave-like manner and transversely to its production direction R by the image regulator 38 and before it enters a subsequent printing unit 04 so that its width B03 is reduced in a manner counteracting the transverse expansion (FIG. 3).
  • the intensity of the reduction in width is preferably inversely related to the factor DQ of the transverse expansion and can preferably also during the ongoing printing process.
  • the deformation of the substrate 03 can, for. B.
  • Another embodiment of the image controller 38 provides at least one air nozzle directed onto the surface of the printing material 03, which, for. B. allows compressed air to flow against the printing material 03 and thus deforms the printing material 03 without contact.
  • a plurality of air nozzles spaced apart from one another, preferably at least three air nozzles, are preferably provided transversely to the production flow P of the printing substrate 03, the air flow of the air nozzle arranged between two air nozzles preferably being directed in the opposite direction to the air flow of its neighboring air nozzles, so that the air flow is opposed of the printing material 03 applied to the air nozzles is deformed in a wave shape.
  • the deformation of the printing material 03 can be controlled steplessly within certain limits, in particular, for example, by a control unit controlling the image regulator 38.
  • the control unit can change the focus point SB of the printed image 11 by actuating the image regulator 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne des procédés pour compenser un allongement transversal et/ou un allongement longitudinal d'une matière d'impression. Selon ces procédés, la matière d'impression traverse des groupes d'impression successifs d'une machine imprimée; une partie de l'allongement transversal est compensée après passage de la matière d'impression à travers un groupe d'impression et avant son entrée dans un groupe d'impression situé en aval, au moyen d'un régulateur d'image, ou une partie de l'allongement transversal est compensée par déplacement d'au moins une forme d'impression placée sur le groupe d'impression situé en aval, par rapport à un repère sur la matière d'impression, ce déplacement s'effectuant transversalement au flux de production de la matière d'impression; une partie de l'allongement transversal et/ou de l'allongement longitudinal de la matière d'impression, connue au moment de la formation d'image sur au moins une forme d'impression à placer sur le groupe d'impression situé en aval, est compensée par la création et/ou le positionnement d'une zone d'image à imprimer sur la forme d'impression.
EP05707820A 2004-01-28 2005-01-21 Procedes pour compenser un allongement transversal et/ou un allongement longitudinal d'une matiere d'impression et machine a imprimer comportant plusieurs groupes d'impression produisant une image imprimee sur une matiere d'impression Withdrawn EP1708887A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004264A DE102004004264C5 (de) 2004-01-28 2004-01-28 Verfahren zur Kompensation einer Querdehnung und/oder einer Längsdehnung eines Bedruckstoffes und Druckmaschine mit mehreren mindestens ein Druckbild auf einem Bedruckstoff erzeugenden Druckwerken
PCT/EP2005/050265 WO2005072967A2 (fr) 2004-01-28 2005-01-21 Procedes pour compenser un allongement transversal et/ou un allongement longitudinal d'une matiere d'impression et machine a imprimer comportant plusieurs groupes d'impression produisant une image imprimee sur une matiere d'impression

Publications (1)

Publication Number Publication Date
EP1708887A2 true EP1708887A2 (fr) 2006-10-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707820A Withdrawn EP1708887A2 (fr) 2004-01-28 2005-01-21 Procedes pour compenser un allongement transversal et/ou un allongement longitudinal d'une matiere d'impression et machine a imprimer comportant plusieurs groupes d'impression produisant une image imprimee sur une matiere d'impression

Country Status (4)

Country Link
US (1) US7614343B2 (fr)
EP (1) EP1708887A2 (fr)
DE (1) DE102004004264C5 (fr)
WO (1) WO2005072967A2 (fr)

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DE102004004264B4 (de) 2008-12-04
WO2005072967A3 (fr) 2006-02-02
DE102004004264C5 (de) 2011-02-24
DE102004004264A1 (de) 2005-09-01
US7614343B2 (en) 2009-11-10
WO2005072967A2 (fr) 2005-08-11
US20070157831A1 (en) 2007-07-12

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