EP1708886A1 - Machine a imprimer faisant appel a un dispositif et a un procede pour compenser un allongement longitudinal et un allongement transversal d'une bande de matiere d' impression imprimee dans differents groupes d'impression - Google Patents

Machine a imprimer faisant appel a un dispositif et a un procede pour compenser un allongement longitudinal et un allongement transversal d'une bande de matiere d' impression imprimee dans differents groupes d'impression

Info

Publication number
EP1708886A1
EP1708886A1 EP05701584A EP05701584A EP1708886A1 EP 1708886 A1 EP1708886 A1 EP 1708886A1 EP 05701584 A EP05701584 A EP 05701584A EP 05701584 A EP05701584 A EP 05701584A EP 1708886 A1 EP1708886 A1 EP 1708886A1
Authority
EP
European Patent Office
Prior art keywords
printing
print image
factor
cylinder
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.)
Granted
Application number
EP05701584A
Other languages
German (de)
English (en)
Other versions
EP1708886B1 (fr
EP1708886B2 (fr
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
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Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1708886A1 publication Critical patent/EP1708886A1/fr
Publication of EP1708886B1 publication Critical patent/EP1708886B1/fr
Application granted granted Critical
Publication of EP1708886B2 publication Critical patent/EP1708886B2/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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 printing presses having a plurality of at least one print image on a printing material-generating printing units and methods for compensating for a longitudinal expansion and / or transverse stretching of a printing material according to the preamble of claim 1, 3, 5, 7, 46, 48 or 65.
  • DE 95 16 368 A1 discloses a method and a device for adapting the position of printing plates to deformation of a paper web to be printed with printing rollers, wherein the printing plate or the holder receiving it in a punching and / or bending machine is in each case around those Dimensions in the lateral direction, adjusted in the circumferential direction and / or in their angular position, which requires this pressure plate on its pressure roller due to the deformation of the paper web to one with a preceding in the feed direction of the paper roll pressure roller despite the now made deformation of the paper web to effect, and where bends and / or punches are attached to this displaced from its zero position printing plate, including a computer-controlled alignment in the punching and / or bending machine is used after the computer the corresponding data of the paper web, the printing press and the production ei are given.
  • the deformation of the paper web which is also known by the term "fan-out"
  • the invention has for its object to provide printing machines with a plurality of at least one print image on a printing material-generating printing units and methods for compensating for a longitudinal expansion and / or transverse stretching of a printing substrate.
  • a longitudinal expansion and / or a transverse expansion of the printing material is compensated for by taking into account the longitudinal expansion and / or the transverse strain influencing factors already in the imaging of the printing form, so that a change in position of one or more printing plates may preferably be omitted on a forme cylinder or are required only to a small extent, whereby devices for changing the position of one or more printing plates on a plate cylinder may be omitted or at least very easily and inexpensively executed. If the longitudinal strain and / or the transverse strain of the substrate influencing factors of the printing press and the printing z. B.
  • a print image for each participating in the printing process printing form in size and location already in the creation of the print image on the printing form needs to the According to experience expected elongation and / or transverse strain to be adjusted, whereby systematic deviations are compensated in particular between successive printing units already for the most part, so that a change in the position of the printing image point having printing form preferably not at all or only for fine adjustment or for tracking during a running printing process is required.
  • Already adapted to the anticipated longitudinal expansion and / or transverse strain of the printing material imprints relieve the operator of the press of time-consuming tests of the correct position of the printing image point having printing form and an orientation of the position of the printing plate on the forme cylinder.
  • Figure 1 is a schematic representation of a suitable for multi-color printing press with four printing units each with two printing units.
  • Figure 2 is a schematic representation of four mutually downstream form cylinders with printing plates with printed image locations.
  • Fig. 3 shows a printing unit with printing images which are produced on a printing substrate
  • Fig. 4 is a arranged in the channel of a forme holding device.
  • Fig. 1 shows in greatly simplified form schematically a printing machine 01, preferably a printing several printing inks different printing 01, z. B. a newspaper printing machine 01, with z. B. four vertically superposed printing units 02, wherein a substrate 03, z. B. a web of material 03, in particular a paper web 03, in the vertical direction, the printing units 02 successively passes.
  • a production flow P of the printing material 03 passing through the printing machine 01 is essentially assumed from the bottom to the top in this example.
  • each printing unit 02 for the perfecting printing on both sides of the paper web 03 each have a printing unit 04 with a cylinder 06 transferring ink and a cylinder 06 rolling on the ink transfer cylinder 07 (cylinder 07)
  • the ink transfer cylinder 06 are preferably formed as an offset printing process transfer cylinder 06, wherein the transfer cylinder 06 preferably have an elastic surface, wherein the elastic surface z. B. is formed by an at least one arranged on the lateral surface of the transfer cylinder 06 blanket of an elastomeric material.
  • the transfer cylinders 06 arranged in each printing unit 02 on both sides of the paper web 03 are set against each other 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 may become one Satellite printing unit are summarized, wherein the printing units 04 of these printing units 02 to a common of the other cylinders 06; 07 separate impression cylinder are arranged, wherein the paper web 03 is guided in each case between the impression cylinder and at least one employed on the impression cylinder transfer cylinder 06.
  • the printing press 01 z. B. as a commercial press 01 with a preferably substantially horizontal guidance of the printing material 03 is formed, wherein in the printing machine 01 along the printing machine 01 continuous production flow P of the printing substrate 03 preferably on both sides, d. H. below and above the printing material 03, a plurality of successive printing units 04 are provided, wherein the transfer cylinder 06 of two arranged in a printing unit 02 printing units 04 in turn z. B. are employed in a rubber-rubber arrangement against each other, wherein the substrate 03 is passed between the two mutually employed transfer cylinders 06, so that the substrate 03 undergoes their mutual Abroll Scheme.
  • the transfer cylinders 06 associated with the form cylinder 07 have on their lateral surface in each case at least one printing forme 08 (FIG. 2).
  • the forme cylinders 07 are preferably provided with a plurality of printing plates 08 in their axial direction X and / or in their circumferential direction Y.
  • the forme cylinders 07 are each provided with six printing plates 08 in their axial direction X and two printing plates 08 in their circumferential direction Y, so that twelve printing plates 08 are then arranged on each forme cylinder 07. 2, a development of such form cylinder 07 is shown schematically each with twelve printing plates 08, wherein belonging to FIG.
  • each printing plate 08 has at least one printed image spot 09 (FIG. 2).
  • the printing plates 08 in the forme cylinder 07 axial direction X and / or in the circumferential direction Y of the forme cylinder 07 a plurality of print image points 09 have.
  • 3 shows, by way of example, the production of six printed images 11 in the axial direction X on the printing substrate 03, which is relative to the forme cylinder 07.
  • the production flow P of the printing material 03 and a production direction R of the forme cylinder 07 and the transfer cylinder 06 cooperating therewith are indicated.
  • a forme cylinder 07 in its axial direction X z. B. six printing plates 08 and in the circumferential direction Y z. B. provide two printing plates 08
  • the forme cylinder 07 can each z. B. be occupied with only a single printing plate 08, wherein this printing forme 08 in the forme cylinder 07 axial direction X z. B. six print image points 09 and / or in the circumferential direction Y of the forme cylinder 07 z. B. has two print image 09.
  • each printing form 08 each have only a single printed image point 09.
  • the printing units 04 which are arranged downstream of one another on the same side of the printing material 03 in the production flow P, preferably print ink with mutually different shades. For example, in four successive printing units 04 color dots of the usual in four-color printing shades black, cyan, magenta and yellow are printed, in each of these printing units 04 color dots of one of these shades. On the forme cylinder 07 of the successive printing units 04 are correlated with the same print image 11 print image points 09, each forming a color separation of the multicolored print image 11 to be generated, each color separation is assigned to one of the colors to be printed. A multicolored printed image 11 is generated by having a plurality of color separations, z. B.
  • the shades black, cyan, magenta and yellow respectively corresponding four color separations are printed on the substrate 03 on top of each other, the color dots of the same print image 11 concerned color separations on the Substrate 03 are arranged side by side or one above the other, so that the multicolor printed image 11 is formed by a color mixing of the resulting from the different color separations color dots.
  • Each print image point 09 has a width B in the forme cylinder 07 axial direction X and a length L in the circumferential direction Y of the forme cylinder 07.
  • a color separation representing print image points 09 for generating a common print image 11 are printed in the production flow P of the printing substrate 03 successively arranged printing units 04 with their respective from the forme cylinder 07 printing ink transferring cylinders 06 precisely over each other. Adherence to this condition, which is necessary for a good printing result, is made more difficult by the fact that the printing substrate 03 from a cylinder 06 transferring an ink to a cylinder 06 following the production flow P usually has a longitudinal expansion along the production flow P and / or a transverse expansion transversely to the production flow P.
  • the longitudinal expansion and / or the transverse strain of the printing material 03 result z. B. from the fact that the substrate 03 from the dampening unit of the printing press 01 transported moisture and / or moisture from the ink and / or moisture from the surrounding the substrate 03 receives air, and / or of a mechanical stretching of the printing material 03 when passing through several each other subsequently arranged printing units 04.
  • Such a longitudinal expansion and / or the transverse expansion of the printing material 03 is known by the term "fan-out".
  • a certain dimensional change is to be expected for each print image point 09 compared to another print image point 09 arranged on a different forme cylinder 07, wherein the dimensional change expresses the length L of two in the production flow P of the printing substrate 03 successive print image points 09 differ by a factor FL and / or the width B of two in the production flow P of the printing substrate 03 successive print image points 09 by a factor FB from each other.
  • the factors FL; FB a relative dimensional change z. B. in percent relative to an original length L or width B or an absolute dimensional change z. B. expressed in the form of a change amount starting from an original length L or width B.
  • Each print image point 09 spans an area limited by its length L and width B (FIG. 2), the surface of a print image point 09 arranged on a forme cylinder 07 being curved in its curvature to match the shape of the 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 by dashed lines in FIG. 2).
  • a position (X1, Y1) of the center of gravity S of this print image location 09 can also be compared to a position (X2, Y2) of a print image location 09 correlating with the common print image 11 on a production flow P of the printing material 03 subsequent form cylinder 07 differ, these print image points 09 are preferably each arranged on a printing plate 08, wherein the printing plates 08 with in the position (X1, Y1); (X2, Y2) of their focal points S different print image points 09 are arranged on their respective form cylinder 07 at the same position.
  • the printing forms 08 carrying the print image points 08 thus remain stationary on their respective form cylinder 07, whereas only the position (X1; Y1); (X2; Y2) at least one of the center of gravity S is displaced by two print image points 09 following each other in the production flow P of the printing substrate 03, so that only the positions (X1, Y1); (X2, Y2) of the focal points S of these print image points 09 z. B. to change a distance W relative to each other (Fig. 2), without changing the position of a printing plate 08 on their respective form cylinder 07.
  • the distance W lies within the same plane of the surface spanned by the length L and width B of the print image point 09 and in this plane the displacement of the center of gravity S can be compared to the position (X1; Y1) of the center of gravity S of the printed image point 09 referred to have any direction.
  • the length L of two printed image points 09 arranged side by side on the same forme cylinder 07 in the axial direction X may be a factor FL and / or the width B of two on the same forme cylinder 07 in its axial direction X juxtaposed print image points 09 differ by a factor FB from each other.
  • the factor FL relating to the length L of the print image point 09 is dependent on a factor DL of the longitudinal expansion and the factor FB relating to the width B of the print image point 09 by a factor DQ of the transverse strain, the factor DL the longitudinal strain and the factor DQ of the transverse strain z.
  • the length L of the print image point 09 is preferably increased by the factor DL of the longitudinal expansion and the width B of the print image point 09 by the factor DQ of the transverse strain.
  • the factor DL of the longitudinal strain and / or the factor DQ of the transverse strain may be variable, wherein the variability may refer to further parameters, in particular on operating conditions of the printing press 01 and properties of the printing material 03 relevant parameters such. B. on the production speed of the printing press 01 or on the temperature of the printing material 03 surrounding air and in particular the content of moisture in this air.
  • the factor DL of the longitudinal strain and / or the factor DQ of the transverse strain can take into account that z. B. the transverse strain for with respect to the forme cylinder 07 near the front "outer" print image 09 has a stronger impact than close to the center of the forme cylinder 07 arranged "inner” print image 09, if z. B. a cylinder length halving center line M as a reference or reference mark M for the transverse strain applies (Fig. 2).
  • the factor FL differing in the length L of two print image areas 09 following each other in the production flow P of the printing substrate 03 and / or the factor FB of two widths B in the production flow P of the printing substrate 03 can follow from the arrangement of that printing unit 04 in the production flow P.
  • FB changed length L and / or width B is arranged, because it affects the value of the factors FL; FB from whether the print image points 09 of immediately consecutive printing units 04 or more widely spaced printing units 04 are compared.
  • the position (X1, Y1) of the center of gravity S of a print image point 09 differs from the position (X2, Y2) of the center of gravity S of another print image point 09 arranged on the same forme cylinder 07 in its axial direction X
  • these comparative image points 09 have the same length L and width B, wherein the print form locations 09 arranged next to one another on the same forme cylinder 07 are each arranged on a printing form 08, the printing forms 08 arranged on the same forme cylinder 07 being in the position (X1; Y1); (X2; Y2) of their emphases S differing Print image points 09 in the axial direction X of the respective forme cylinder 07 are arranged in alignment with each other.
  • FIG. B To hold one or more printing plates 08 on the lateral surface 12 of a forme cylinder 07 -as can be seen from FIG. B. a running in the axial direction X under the lateral surface 12 extending channel 13 with a preferably slot-shaped opening 14, wherein at the ends 16; 17 of the printing plate (s) 08 bent legs 18; 19 itself of edges 21; 22 on the lateral surface 12 of the opening 14 to the interior of the channel 13 extending walls 23; 24 are applied, wherein one of the legs 18 at the leading in the production direction R of the forme cylinder 07 end 16 of the printing plate (s) 08 at the lying with respect to a lying on the opening 14 tangent T at a preferably acute opening angle ⁇ to the channel 13 extending Wall 23 is hooked and the other leg 19 at the trailing in the production direction R of the forme cylinder 07 end 17 of the printing plate (s) 08 at the lying with respect to the lying on the opening 14 imaginary tangent T at a preferably approximately rectangular opening angle ß to the channel 13 extending wall 24 is
  • the guide element 34 may be arranged on a support element 37 supported on a wall 36 of the channel 13.
  • the opening 14 has on the lateral surface 12 of the forme cylinder 07 a slot width V of preferably less than 5 mm, wherein the slot width V is in particular between 1 mm and 3 mm.
  • the holding means 27, the adjusting means 32 and the spring element 33 form in the illustrated example essential elements of a holding device for holding one or more printing plates 08 on the lateral surface 12 of a forme cylinder 07.
  • z. B. in the opening 14 at least one arranged in at least one forme 07 register pin may be provided, wherein the register pin aligns at least one arranged on the forme 07 printing plate 08 in the forme cylinder 07 axial direction X.
  • the holding device or the register pin are designed for their interaction with at least one printing plate 08 and can in the channel 13 z. B. depending on the factor DQ of the transverse strain, preferably in a proportional to the behavior of the factor DQ of the transverse strain ratio, are moved in the axial direction X of the forme cylinder 07.
  • each printing forme 08 is associated with at least one holding device or at least one register pin. It is advantageous if each printing forme 08 is individually displaceable in the axial direction X for the forme cylinder 07. Alternatively or in addition to the displaceability of one or more printing plates 08 on a forme cylinder 07, it can be provided that the entire forme cylinder 07 is displaceable in its axial direction X, as a result of which all the printing plates 08 arranged on it are likewise displaced.
  • the reference mark M can also be located at another location of the printing substrate 03, z. B. at one of its lateral edges.
  • the transversely to the production flow P of the printing material 03 directed displacement of the printing plates 08 may be based on a stationary frame of the printing machine 01 instead of the substrate 03.
  • the forme cylinder 07 and / or the ink transferring cylinder 06 at least one of two mutually downstream printing units 04 are preferably by a controllable drive (not shown), for. B. of an electric motor, in particular of a frequency-controlled motor driven. It can also be provided that the forme cylinder 07 and / or the ink-transferring cylinder 06 is driven individually in any one another "* downstream printing units 04th
  • controllable actuators preferably a mutually occupied phase position of the forme cylinder 07 and / or the
  • the ink transfer cylinder 06 of at least two printing units 04 can be controlled as a function of the factor DL of the longitudinal elongation With the controllable phase position of the forme cylinder 07 and / or the ink transferring cylinder 06, in particular a peripheral register of the forme cylinder 07 can be influenced.
  • the actuator and / or the phase position of the forme cylinder 07 and / or the ink transferring cylinder 06 are steplessly controllable.
  • the actor and / or the Phase position of the forme cylinder 07 and / or the ink transferring cylinder 06 are preferably controllable in the current 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 z. B. from one of the printing machine 01 associated control station or controlled by another central control unit, ie they are remotely controllable.
  • the memory each having at least one value for the factor FL of the length L of two print image locations 09 following one another in the production flow P of the printing substrate 03 and / or at least one value for contains the factor FB of the width B of two in the production flow P of the printing substrate 03 successive print image points 09.
  • the memory may in each case contain at least one value for the factor FL of length L of two printed image points 09 arranged side by side on the same form cylinder 07 and / or at least one value for the factor FB of width B of two print image points 09 arranged side by side on the same form cylinder 07.
  • the memory can each have at least one value for the different positions (X1; Y1); (X2; Y2) of the center of gravity S of two print image points 09 following one another in the production flow P of the printing stock 03 or at least one value for the different positions (X1; Y1); (X2; Y2) of the center of gravity S of two printed image points 09 arranged side by side on the same forme cylinder 07.
  • control unit the center of gravity S at least one in the production flow P of the printing material 03 of another print image 09 subsequent print image 09 a z. B. in a running printing process of the longitudinal expansion and / or by the transverse strain of the printing material 03 shifted center of gravity SB of the printed image 11 nachfood (Fig. 3).
  • the control unit controls at least the actuator and / or the phase position of the forme cylinder 07 and / or the Ink transfer cylinder 06 preferably in response to the value stored in 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 center of gravity SB of the print image 11 to be printed is z. B.
  • control unit detection device for. B. a print image 11 optically detecting and digitally evaluating device, eg. B. a semiconductor camera with a CCD sensor.
  • control unit actuates devices connected to it in such a way that the center of gravity S of the print image areas 09 which print a common print image 11 is matched to the center of gravity SB of the print image 11 to be printed.
  • Methods proposed here for compensating the longitudinal expansion and / or the transverse expansion of the printing substrate 03 provide, preferably preferably, a displacement of at least one printing forme 08 on one of the forme cylinders 07, wherein the displacement takes place relative to a reference mark M on the printing substrate 03 the length L of at least one printed image point 09 of a printing form 08 compared to the length L of a printing image point 09 correlating with the same printed image 11 of another printing form 08 arranged on another form cylinder 07 by the factor FL and / or the width B of at least one printed image point 09 of a printing form 08 is changed by the factor FB in comparison to the width B of a correlated with the same print image 11 print image 09 a arranged on another form cylinder 07 other form of printing 08.
  • the position (X1; Y1) of a center of gravity S of at least one print image location 09 of a printing form 08 is compared with the position (X2; Y2) of the center of gravity S of a printing image site 09 correlating with the same printing image 11, and one on another 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 center of gravity S of the print image point 09 preferably using the factor DL of the longitudinal strain and / or the factor DQ of the transverse strain.
  • a value for the length L changing factor FL is preferably determined as a function of the factor DL of the longitudinal expansion and a value for the width B changing factor FB is preferably determined as a function of the factor DQ of the transverse strain.
  • the value for the length L changing factor FL and / or the value for the width B changing factor FB and / or the coordinates for a new position (X1; Y1); (X2; Y2) of the center of gravity S of the print image point 09 of the printing forme 08 on one of the forme cylinders 07 can also be determined on a different forme cylinder 07 as a function of the printing image point 09 of another printing forme 08 arranged at the same position of the forme cylinder 07.
  • a change in the length L and / or the width B of a print image location 09 or a change in position (X1; Y1); (X2; Y2) of its center of gravity S for compensating a part of the elongation at break and / or the transverse strain known at the time of imaging of the printing forme 08 is preferably carried out on a forme cylinder 07 with a printing forme 08 having a printing image point 09 to be changed at the same position of the forme cylinder 07 a printing forme 08 is arranged with the modified in their aforementioned parameters print image 09.
  • at least a part of the compensation of the "fan-out effect" takes place in connection with the imaging of the printing form 08, ie in the creation of its print image point 09.
  • the change relates to a change in the dimension and / or the position of the print image point 09 on a printing plate 08, whereby expected systematic deviations between at least two printed image points 09 are compensated.
  • a change in the position of the printing forme 08 on the forme cylinder 07 is often no longer necessary or only for fine adjustment or tracking during the current printing process.
  • the imaging system preferably controlled by a computer and starting from a digital data set the print image location 09 z. B. with a laser on the printing plate 08 applies.
  • the imaging system thus creates the print image point 09 on a printing plate 08 in accordance with the provided specifications and thus compensates for the expected effects of a "fan-out effect.”
  • the imaging system images the printing plate 08 in particular as a function of the color tone of the ink transfer cylinder 06 and / or from the arrangement of the printing unit 04 with the printing plate 08-carrying forme cylinder 07 in the production flow P of the printing substrate 03 and / or from the position of the forme cylinder 07 arranged printing form 08.
  • the imaging system thus takes into account when creating a print image 09 their position a printing form 08, wherein this position is usually determined by an occupancy schedule created in a prepress stage.On the basis of the position of the printing forme 08 on one of the forme cylinders 07 required according to the occupancy plan, the imaging system then fits at least some Print image points 09, preferably each print image 09 in a first printing unit 04 subsequent further printing unit 04, in their length L and / or width B and / or in the position of its center of gravity S as a function of the mentioned in generating the same print image 11 factors to be considered in order to counteract anticipated systematic deviations in the current printing process and to compensate them as far as possible by means of a suitable design and / or arrangement, ie positioning of the print image point 09.
  • On at least one of the forme cylinder 07 can then be arranged a printing forme 08 with the changed print image 09 when an actual value for the length L changing factor FL and / or an actual value for the width B changing factor FB and / or an actual value for the position to be changed (X1; Y1); (X2, Y2) of the center of gravity S of the print image point 09 of a printing form 08 exceeds a permissible deviation from the determined setpoint values.
  • the creation of a printing forme 08 with an altered print image point 09 and its replacement on the relevant forme cylinder 07 is required, which may mean an interruption of the printing process.
  • the setpoints are z. B. determined for each hue that transmits an ink transferring cylinder 06. Or the setpoint values are determined for each forme cylinder 07 of the printing units 04 following each other in the production flow P of the printing substrate 03 and / or for each position of a printing form 08 arranged on one of the forme cylinders 07.
  • the determined setpoint values are preferably stored in a memory and, if necessary, made available to the imaging system. Furthermore, at least part of the transverse expansion of the printing substrate 03 can be counteracted by the use of an image controller 38 (FIG.
  • the printing material 03 preferably deforms undulating transversely to its production direction R through the image regulator 38 prior to its entry into a subsequent printing group 04, and so that in its width B03 is reduced in a cross-strain counteracting manner (Fig. 3).
  • the intensity of the width reduction preferably takes place in inverse proportion to the factor DQ of the transverse strain and can preferably also be changed during the current printing process.
  • the deformation of the printing material 03 may, for. B. mechanically by preferably both sides of the printing material 03 done to these salaried roles, these roles preferably to avoid quality-reducing influences attack outside of the print image 11 on the substrate 03 and are preferably driven independently by rotation.
  • Another embodiment of the image controller 38 provides at least one directed onto the surface of the printing material 03 air nozzle, the z. B. can flow compressed air against the substrate 03 and the substrate 03 thus deformed contactless.
  • a plurality of spaced air nozzles are preferably provided transversely to the production flow P of the printing material 03, preferably at least three air nozzles, wherein the air flow of the air nozzle arranged between two air nozzles is preferably directed against the air flow of their adjacent air nozzles, so that with the air flow the printing material 03, which is acted upon by the air nozzles, is deformed wave-like.
  • Both the mechanical and the pneumatic image controller 38, the deformation of the printing material 03 by a controller 38 controlling the image controller is preferably steplessly controlled within certain limits, in particular z. B. remotely controllable by a press 01 belonging control room.
  • the control unit can change the center of gravity SB of the print image 11 by actuating the image controller 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Rotary Presses (AREA)

Abstract

L'invention concerne des machines à imprimer (01) comportant plusieurs groupes d'impression (04) produisant au moins une image imprimée (11) sur une matière d'impression (03), ainsi que des procédés pour compenser un allongement longitudinal et/ou un allongement transversal d'une matière d'impression (03). Selon l'invention, un allongement longitudinal et/ou un allongement transversal escomptés de la matière d'impression (03) sont pris en considération par adaptation de la longueur (L), de la largeur (B) et/ou de la position d'une zone d'image à imprimer (09) corrélée avec l'image à imprimer (11), par un système de formation d'images produisant la zone d'image à imprimer (09) sur une forme d'impression.
EP05701584A 2004-01-28 2005-01-21 Machine a imprimer faisant appel a un dispositif et a un procede pour compenser un allongement longitudinal et un allongement transversal d'une bande de matiere d' impression imprimee dans differents groupes d'impression Not-in-force EP1708886B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004263 2004-01-28
PCT/EP2005/050261 WO2005072966A1 (fr) 2004-01-28 2005-01-21 Machine a imprimer faisant appel a un dispositif et a un procede pour compenser un allongement longitudinal et un allongement transversal d'une bande de matiere d'impression imprimee dans differents groupes d'impression

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EP1708886A1 true EP1708886A1 (fr) 2006-10-11
EP1708886B1 EP1708886B1 (fr) 2008-03-19
EP1708886B2 EP1708886B2 (fr) 2012-04-11

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US (1) US7631598B2 (fr)
EP (1) EP1708886B2 (fr)
AT (1) ATE389537T1 (fr)
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WO (1) WO2005072966A1 (fr)

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DE102015215539A1 (de) 2014-09-18 2016-03-24 Koenig & Bauer Ag Vorrichtung zum Anpassen mindestens eines Zylinderaufzugs an eine Bedruckstoffänderung in einer Druckmaschine
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Also Published As

Publication number Publication date
EP1708886B1 (fr) 2008-03-19
EP1708886B2 (fr) 2012-04-11
WO2005072966A1 (fr) 2005-08-11
ATE389537T1 (de) 2008-04-15
US20080098913A1 (en) 2008-05-01
US7631598B2 (en) 2009-12-15
DE502005003308D1 (de) 2008-04-30

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