EP1593513A2 - Druckmaschinen mit mindestens zwei jeweils eine Drucksubstanz tragenden Farbträgern - Google Patents
Druckmaschinen mit mindestens zwei jeweils eine Drucksubstanz tragenden Farbträgern Download PDFInfo
- Publication number
- EP1593513A2 EP1593513A2 EP05101653A EP05101653A EP1593513A2 EP 1593513 A2 EP1593513 A2 EP 1593513A2 EP 05101653 A EP05101653 A EP 05101653A EP 05101653 A EP05101653 A EP 05101653A EP 1593513 A2 EP1593513 A2 EP 1593513A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- color
- machine according
- printing machine
- control device
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
- B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
- B41J2/471—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
- B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
- B41J2/515—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements line printer type
Definitions
- the invention relates to printing presses with at least two each a printing substance carrying colorants according to the preamble of claim 1, 2 or 3.
- a printing method which is capable of a Printing substance by means of a preferably pulsed and focused energy beam, z. B. a laser beam or electron beam to print.
- This will be the energy of Energy beam either directly or after a transformation in one Absorption layer indirectly entered into the printing substance, wherein the printing substance z. B. from in a solvent, for. B. dissolved in water color pigments.
- Both cases are due to the high energy density of the energy radiation in the Printing substance by thermal expansion or evaporation, in particular of the solvent explosively a small gas bubble, which upon exiting the pressure substance a portion of the printing substance in the direction of one of the printing substance low displaced printed substrate displaced and there sets a pressure point.
- the so-called light hydraulic effect in which means of a light pulse in a liquid, a shock wave is generated, wherein the Light pulse is entered directly into the liquid or indirectly to the liquid acts and in both cases in the liquid punctually abruptly to a thermal conditional volume expansion leads.
- the light hydraulic effect is z. B. in the EP 0 836 939 B1, stating further sources.
- the printing substance is a homogeneous film applied to a color carrier, wherein the color carrier z.
- a rotating cylinder is preferably formed as a transparent hollow cylinder made of glass.
- the color carrier and the substrate pass each other without touching.
- an absorption layer is applied, which is applied over the entire surface, At first, the energy beam does not penetrate its wavelength in this case absorbing pressure substance and only then meets its radiation energy z.
- the Absorption layer preferably consists of a crystalline material, preferably of polysilicate, wherein the crystal size is between 10 nm and 1000 nm, and advantageously smaller than the wavelength of the energy radiation used.
- the Thickness of the absorption layer should be less than 10 .mu.m, preferably less than 1 .mu.m.
- An energy beam directed at the printing substance should be at an angle ⁇ to Normals of the surface of the printing substance of more than 0 ° and less than 75 ° come to mind.
- the distance between the color carrier and the at him with a Transport speed of material passed by is less than 2 mm, preferably even less than 0.5 mm.
- the pulse duration of Energy radiation should be less than 1 ⁇ s, preferably between 100 ns and 200 ns be.
- the power of the energy radiation is on the order of 50 W to 100 W or more.
- As an energy source are exemplary laser diodes or arrays, d. H. Arrangements of laser diodes, mentioned. Concrete information on the wavelength and Pulse repetition frequency of the energy radiation used are missing.
- DE 197 46 174 C1 is a printing press with four in the transport direction of a Printing material successively arranged printing units known, wherein the Printing units each print different colors. Each of these Printers print the color z. B. using a light hydraulic effect. It DE 197 46 174 C1 can not be deduced that the printing units different Print separations of the same print image.
- an ink jet pen in which ink is applied in a thin layer of 10 .mu.m to 100 .mu.m on a glass substrate or ribbon and selectively with a modulated depending on an image signal beam of a laser, preferably a CO 2 laser , is heated to over 100 ° C for a period of 0.1 ⁇ s to 1 ⁇ s to form a bubble which, when bursting, forms ink at a distance of less than 1 mm from the glass substrate or ink ribbon with the heated ink transfers pasted substrate.
- a laser preferably a CO 2 laser
- an ink jet pen for printing a plurality of inks such as red, green, blue and black commercial water-soluble ink, wherein for each ink, an ink cartridge is provided, which is sequentially introduced into the beam path of the laser.
- inks with a low light absorption such. B. red or yellow ink in particular, is applied uniformly on the substrate light-absorbing film with a layer thickness of less than 20 microns is used, which is incident on the light beam of the laser, wherein the light-absorbing film in contact with the ink to the formation of a Bubble heated in the ink, wherein the bubble is expelled in the direction of the printing material from the ink cartridge.
- the invention is based on the object printing presses with at least two each to provide a printing substance-carrying colorants, each of these Printing machines using a non-permanent printing form using Printing process, a multicolored print image good print quality, especially in terms its color registration and / or halftone density.
- Printing machines with at least two color carriers are described below. wherein on the color carriers a printing substance is applied, wherein in the preferred Execution of a transfer of at least a portion of the printing substance to one of each of the ink carrier spaced arranged substrate z. B. using the light hydraulic effect takes place, wherein transported to the printing substance, d. H. from one Radiation source sent and received by the printing substance radiation energy the transmission of the printing substance to the substrate stimulates or at least affected.
- the advantages achieved by the invention are in particular that in Printing process a synchronization for those made by multiple color carriers Transmission of their printing substance on the substrate to produce a common printed image corresponding to the colorimage belonging to the printed image is provided and / or that made with the transfer of the printing substance Area coverage of the substrate with regard to their optical efficiency can be influenced.
- Fig. 1 shows a simplified representation of a printing unit of a printing machine with at least a first color carrier 01, the z. B. as a first rotating cylinder 01 is trained.
- a Absorption layer 03 applied, wherein the absorption layer 03 over the entire surface smooth or is formed in the form of a regular or irregular structure, wherein the Structure z. B. introduced in the form of in the surface of the absorption layer 03 Wells, especially of very small wells can be designed.
- the Absorption layer 03 has a layer thickness z. B. of less than 20 microns, in particular less than 5 microns. It is in Figs. 1 and 2 for drawing reasons better recognizability shown greatly enlarged.
- An associated with the cylinder 01 first inking unit 04 carries z. B. with at least one inking roller 06 a film of a first printing substance 07 preferably on the entire surface of this cylinder 01, wherein z. B. the cups of the absorption layer 03 are filled with the printing substance 07. Also the film of the printing substance 07 is shown in Figs. 1 and 2 enlarged.
- a printing material 08, z. B. a sheet 08 or a web of material 08, in particular a Paper web 08, is at a distance a of preferably less than 2 mm, in particular of less than 0.5 mm in front of the first cylinder 01 or preferably with a preferably a rotational speed v01 of the cylinder 01 adapted Transport speed v81 before the cylinder 01 moved past.
- a first guide roller 09 or guide roller 09 may be provided which the printing material 08th preferably on the one hand in its position, d. H. especially at its distance a before the Cylinder 01 stabilized and the printing substrate 08 on the other hand in its transport direction makes distractible from the cylinder 01, d. H. the printing substrate 08 in particular in one of Cylinder 01 deflects the opposite direction.
- a first radiation source 11 with a low beam divergence a so-called Point light source, e.g. B. a laser 11, in particular a solid-state laser 11, z. B. a Ruby laser or a neodymium YAG laser emits radiant energy of high energy density in the form of a first energy beam 12 to the applied on the cylinder 01 Printing substance 07, wherein the first energy beam 12 with a normal 13 of a Surface 19 of the printing substance 07 an angle ⁇ of more than 0 ° and less than 90 °, preferably less than 45 °.
- At least one second radiation source 14 also with a low beam divergence, z. B.
- a laser 14, in particular a solid state laser 14 also emits radiant energy of high energy density in the form a second energy beam 16 z. B. to the applied on the first cylinder 01 first printing substance 07, wherein the second energy beam 16 z. B. also with the Normal 13 of the surface 19 of the first printing substance 07 or a normal 27th a surface 19 of a second printing substance 26 an angle ⁇ of more than 0 ° and less than 90 °, preferably less than 45 ° forms.
- the arrangement of Radiation sources 11; 14 may be chosen such that the between the normals 13; 27 and the energy beams 12; 16 trained angle ⁇ ; ⁇ at least approximately are the same. Also, the radiation sources 11; 14 be designed so that they z. B.
- a single radiation source which is capable of at least two Energy beams 12; 16 to emit, the energy beams 12; 16 from each other have different wavelengths.
- some laser systems can be used optionally for the emission of energy beams 12; 16 different wavelengths stimulate.
- here are frequency doubled or frequency tripled neodymium YAG lasers called, whose energy beams 12; 16, half or a third of their natural wavelength of 1064 nm.
- the radiation sources 11; 14 arise in that a single radiation source 11, 14, z.
- a dye laser in which preferably organic dyes, for. As rhodamine, coumarins or oxazines in a carrier medium, e.g. B.
- a carrier liquid are dissolved, radiation energy in a spectral range of z. B. 60 nm or more, from the at least two Energy beams 12; 16 different wavelength preferably by optical Devices, eg. B. are separated by filters.
- the radiation sources 11; 14 emit their radiation energy z. B. continuously, but preferably in pulses of short duration, z. B. in pulses of significantly less than 1 microseconds, in particular of about 100 ns, but for with a high pulse repetition frequency of z. 1 MHz or more.
- An intensity of from the radiation sources 11; 14 emit radiation energy can z. B. by the Duration of the pulses or by their amplitude can be set.
- the applied on the ink carrier 01 absorption layer 03 absorbs the of the Radiation sources 11; 14 emitted radiant energy and converts it into heat or in a momentum transfer, whereby according to the preferably used light hydraulic Effect in the printing substance 07 by thermal expansion or evaporation explosive a gas bubble is formed, the at its exit from the printing substance 07 a Part 18 of the printing substance 07 in the direction of the spaced apart from the printing substance 07 Supersedes printing material 08 and sets a pressure point there.
- Fig. 2 a Sectional enlargement of Fig. 1, shows by way of example, as reflected by the idea of energy beams 12; 16 a part 18 of the printing substance 07, z. B.
- the size or Amount of transferred to the substrate 08 portion 18 of the printing substance 07 is of the intensity of the energy beam 12 introduced into the printing substance 07; 16 Depending on why a made with the transfer of the printing substance 07 Surface coverage of the printing substrate 08 with regard to its optical effectiveness can be influenced, d. H. a size and density of on the substrate 08 through the Transfer of the printing substance 07 applied pressure points is about in the Printing substance 07 introduced intensity of the energy beam 12; 16 controllable. On in this way, the halftone density is controlled.
- a second color carrier 21 is provided, the above-described first color carrier 01 in construction and in its use preferably substantially equalizes, so z. B. as a second rotating cylinder 21st z. B. is formed with an absorption layer 22, wherein on the surface of the second cylinder 21, d. H. preferably on the absorption layer 22, with a the second cylinder 21 associated second inking unit 23 with z.
- At least one Ink application roller 24, a second printing substance 26 is applied, wherein the first printing substance 07 and the second printing substance 26 in their material Characteristics or preferably differ in their spectral behavior. So can the printing substances used 07; 26 z. B. as two different inks be formed, z. B.
- the first printing substance 07 as a color
- the second Printing substance 26 as a black color, which is available for in the printing press standing energy beams 12; 16 a different absorption capacity exhibit.
- the printing substances 07; 26 is i. d. R. to a dispersion from a solid colorant, a liquid binder and optionally a Printing aid
- the printing substance 07; 26 is added to a special Property of the printing substance 07; To achieve 26, such. B. whose consistency, drying, Rub resistance or gloss, wherein the colorant, for. B. powdered pigments in the Binders, e.g. B. a viscous, oily varnish is finely distributed.
- the Printing substances 07; 26 are therefore preferably of liquid or at least flowable consistency.
- the printing substrate 08 is at a distance b of preferably less than 2 mm, in particular of less than 0.5 mm in front of the second cylinder 21 or is arranged with a transport speed v82, preferably a rotational speed v21 of the second cylinder 21 is adapted to move past the second cylinder 21.
- the rotational speed v21 of the second cylinder 21 and the Transport speed v82 of the printing material 08 close to the second cylinder 21st can from the rotational speed v01 of the first cylinder 01 and the Transport speed v81 of the printing stock 08 near the first cylinder 01 differ.
- a second guide roller 29 or guide roller 29th be provided that the printing substrate 08 on the one hand in its position, d. H. especially in stabilized its distance b in front of the second cylinder 21 and the substrate 08th on the other hand makes it deflectable in the transport direction of the second cylinder 21, d. H. the printing substrate 08 in particular in a direction remote from the second cylinder 21 direction deflects.
- it is considered to be contiguous Material web 08 formed substrate 08 z. B. by means of an arrangement third Deflection rollers 31 or guide rollers 31 from the first cylinder 01 to the second cylinder 21st directed.
- the printing machine can, if necessary, in a corresponding manner to further color carrier and radiation sources are extended, but what in the figures to preserve the Clarity is not shown in detail. In this way, the press becomes too a multi-color printing machine upgraded, which is able to z.
- B. the usual four Basic colors black, cyan, magenta and yellow, as well as others if necessary Print spot colors and spot colors in the same printing process, where These printing substances can be seen in their material nature and in their Distinguish spectral behavior.
- the energy beams 12; 16, preferably those of different wavelengths, can on the same, z. B. be directed to the first color carrier 01. This option allows it, on the same color carrier 01 printing substances 07 z. B. the same color, but Nevertheless, to print different material quality, the different material condition z. B. by different formulations of Pressure substances 07 may be conditional.
- An alternative arrangement provides that at least one energy beam 12; 16 is directed to another second color carrier 21 or optionally at least judicious. Arrangements may also be provided where z. B.
- a first energy beam 12 is directed at a first wavelength
- a second energy beam 16 with a second wavelength is directed at virtually the same time is, wherein the wavelengths of the energy beams 12; 16 preferably from each other differ.
- an energy beam 12; 16 with the for on the respective ink carrier 01; 21 applied printing substance 07; 26 optimal Be directed wavelength wherein the energy beams 12; 16 in their respective Wavelength according to the material condition and / or the spectral behavior the respective printing substance 07; 26 different from each other. So can accordingly the material nature and / or the spectral behavior of the respective Printing substance 07; 26 for each color carrier 01; 21, an energy beam 12; 16 with one for the Transmission of the respective printing substance 07; 26 optimal wavelength and selected be set.
- a color carrier 01 could on a color carrier 01; 21 with the color magenta frequency doubled neodymium YAG laser with one in the green spectral range Wavelength of 532 nm, on a color carrier 01; 21 with the cyan color cyan Ruby laser with a lying in the red spectral wavelength of 694 nm and on a color carrier 01; 21 with the color yellow (yellow) a GaN semiconductor laser with a directed in the violet-blue spectral range wavelength of 395 nm to 440 nm be.
- the transfer of the respective printing substance 07; 26 is optimal when the Absorption of the irradiated energy beam 12; 16 their highest efficiency which is the case when an energy beam 12; 16 with a wavelength of one to the printing substance 07; 26 complementary spectral range is used.
- Color carrier 01; 21 with the black color can in principle energy beams 12; 16 can be used of any wavelength, but is suitable in its fundamental frequency operated neodymium YAG laser with an infrared wavelength of 1064 nm especially good.
- this fourth color carrier 01 can the Energy beam 12 emitting radiation source 11 z. B. inside the cylinder 01 be arranged or the energy beam 12 is from the outside of the cylinder 01 arranged radiation source 11 by optical means in the interior of the cylinder 01st steered and from there z. B. directed by means of mirror to the printing substance 07.
- the energy beams 12; 16 at a place of impact 17 on the the substrate 08 facing surface 19 of the color carriers 01; 21 applied printing substances 07; 26 focuses, with the focus at the point of impact 17 has a diameter of less than 30 microns, preferably less than 20 microns having.
- the radiation sources 11; 14 are preferably stationary with respect to the printing press arranged.
- the laser systems are with their peripheral aggregates, z. B. with the Devices for their power supply or cooling, preferably outside the However, they can also be inside a cylinder 01; 21 trained color carrier 01; Be arranged 21 and the energy beam 12; 16 of the Radiation sources 11; 14 is by optical means in the interior of the cylinder as 01; 21 trained color carrier 01; 21 passed to from there to the printing substance 07; 26 directed to become.
- the of the radiation sources 11; 14 emitted energy beams 12; 16 can be changeable with regard to their beam path, z. B. by optical Guidance systems or deflection systems to different locations of the printing machine, in particular to different color carriers 01; 21 be conductive.
- a printed image produced in multicolor printing is usually composed of several color separations, Also called partial color separations, constructed, each color separation pixels of a individual ink in the common printed image, with several Color separations are printed on top of each other, so that the pixels of the construction of the common color image involved side by side, in part, too standing side by side, and / or lying on each other.
- this print-technical print-building is a so-called autotypical Color mixing process with both a subtractive color mixing by the Overprint of the pixels of individual inks as well as with an additive Color mixing by an integration of the pixels of individual printing inks through the Eye of a beholder.
- the color carrier 01; 21 of the printing press sequentially at least part of the common, from print images constructed on several print separations on the printing substrate 08, wherein the printing press in a running printing process usually a variety of similar printed images consecutively on the by the printing press transported substrate 08 prints.
- the quality of the multicolored print image becomes decisively influenced by how accurately positioned the pixels of the building of the common color image involved color separations are arranged to each other. These Positional accuracy of the correlating pixels from different Color separations are also called passer or color register. at successively generated, similar printed images is to ensure that the Passer or the color register possible for all in the current printing process generated Print images remain within specified permissible tolerance limits. On compliance The tolerance limits according to the invention by control technology or Regulatory measures worked.
- the exact positional accuracy of the correlated pixels from different color separations is in the range less than 1/100 mm.
- a control station of the printing machine integrated control device 28 wherein the controller 28 includes peripheral devices (not shown) such as an input unit, e.g. B. a keyboard, and / or an output unit, e.g. As a monitor, and for the Reception and the transfer of data may be connected to a data network.
- peripheral devices such as an input unit, e.g. B. a keyboard, and / or an output unit, e.g. As a monitor, and for the Reception and the transfer of data may be connected to a data network.
- the controller 28 sends z. B. by a corresponding control of Radiation sources 11; 14 to be directed to the second color carrier 21 Radiation energy offset in time to the directed on the first ink carrier 01 Radiation energy, wherein the temporal offset the sequential pressure of the same Printout belonging color separations synchronized with each other, d. H. in a precise position to Cover so that the pixels in each color separation for the common Correlate print image in the desired manner.
- a temporal Offset can also be between other belonging to the printing press color carriers 01; 21 exist, wherein the time offset in each case on the first in the sequential pressure Color carrier 01 or the time offset of the second color carrier 21 always on him immediately preceding color carrier 01 may be related.
- the temporal offset corresponds to z. B. a transport time of the printing material 08 between the locations of Transfer of the printing substance 07; 26, the color carrier 01; 21st
- the Control device 28 controls the cylinder 01; 21 in terms of their angular position in particular such that the angular offset depends on the Rotation speed v01 of the first cylinder 01 and the rotation speed v21 of the second cylinder 21, the sequential pressure of the same print image belonging color separations synchronized with each other.
- the angular offset between the Cylinders 01; 21 corresponds in this way z. B. with the transport time of Printing substrate 08 between the locations of the transfer of printing substance 07; 26 of the Color carrier 01; 21st
- the drives 32; 33, the cylinder 01; 21 are z. B. as electric motors 32; 33 designed, in particular as in their respective angular position by the control device 28 controllable or controllable motors 32; 33. In practice, it is often sufficient to use the motors 32; 33 to control. Provided a feedback from the motors 32; 33 to Control device 28, the motors 32; 33 in particular to compensate Interference also be regulated.
- the aforementioned controller 28 may be required also be suitable for the function of the rules.
- all color carrier 01; 21 of the printing press each as a rotating cylinder 01; 21 formed, wherein z. B. all cylinders 01; 21 controllable or controllable motors 32; 33 have.
- the drives 32; 33 are z. B. coaxial with the axis of the cylinder 01; 21 arranged and preferably with the Axis of the cylinder 01; 21 rigidly connected.
- an image processing system be provided, wherein the image processing system at least a part at least of a printed or to be printed color separation detected as an image, wherein the Controller 28 in response to that of the image processing system captured image on the color carrier 01; 21 to be directed radiation energy in their Intensity controls and thus affects the halftone density at least one color separation.
- control device 28 for the synchronization of the color carriers 01; 21 sequentially printed color separations of the same printed image data obtained from a prepress process upstream of the printing process.
- the data from the prepress stage is a target position with respect to all, but at least one the printed or printed color separations. If from the prepress data with regard to the color separations are not available, these can be used as a reference required data can also be obtained from one image or multiple images, wherein the image or images of a correlated with the print image to be printed Reference print image have been recorded.
- the actual position of a printed or printed color separation is z. B. with the determined at least a part of the print image detecting image processing system.
- the image processing system has a transport direction of the printing material 08 before the color carrier 01; 21 of the color separation to be printed and / or behind the Color carrier 01; 21 of the printed color separation arranged image sensor 34, wherein the image sensor 34 z. B. as a CCD chip in a camera, z. B. a line camera or Surface camera, in particular a color camera, is formed.
- Fig. 1 are both shown positions for the image sensor 34, wherein it is in practice in the Usually sufficient to choose one of these two positions.
- the Image processing system can, for. B.
- the Image sensor 34 passes its output signal to the control device 28.
- the Image processing system controls with the controller 28 in response to Output signal of the image sensor 34 z.
- Suitable printed image sections can be manually by the operator or automatically z. B. by the control device 28, z. B. for a presetting of the desired position, done.
- Suitable printed image sections with regard to the color register are areas within of the printed image, in which the to be measured as well as in register Printing ink dominates or occurs exclusively.
- each produced printed image is recorded and broken down into its color separations or in the course of the production of a printed image whose individual are already printed Color separations recorded.
- suitable print-outs the position of the individual separations is determined. This is done by comparison with the color separations from the reference print image z.
- a correlation method in particular a cross-correlation method.
- the Position of the separations can be determined very accurately. This comparison can be for every one Print image to increase the accuracy of measurement can be repeated several times.
- Position differences are converted by the control device 28 into setting commands and as correction signals z. B. to the radiation sources 11; 14 or to the drives 32; 33 sent for their respective synchronization.
- the control device 28 in particular then sends the onto the second color carrier 21st to be directed radiation energy offset in time to the on the first color carrier 01 directed radiation energy when the z. B. determined with the image processing system Actual position of a printed or to be printed color separation from its nominal position deviates more than a permissible tolerance value.
- the controls Control device 28, the cylinder 01; 21 in terms of their angular position then such that the with the on the second color carrier 21 to be directed radiation energy corresponding angular position of the second cylinder 21 to the one with the first Color carrier 01 directed radiation energy corresponding angular position of the first Cylinder 01 is offset by an angle when the z. B.
- the Image processing system determined actual position of a printed or to be printed Color separation from its nominal position by more than a permissible tolerance value differs.
- the maximum permissible values of a few 1/100 mm Tolerance values for the positional accuracy can, for. B. on the controller 28th preset and changed if necessary.
- the invention is exemplified here in connection with a light hydraulic Effect using printing method described embodiment not limited, but can z. B. also in a printing press, which is an electrophotographic printing process uses, be applied.
- the one uses electrophotographic printing process is that of the color carriers 01; 21 on one Printing substrate 08 to be transferred printing substance 07; 26 often formed in powder form, z. As a toner.
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Abstract
Description
- Fig. 1
- eine vereinfachte Darstellung eines Druckwerks einer Druckmaschine;
- Fig. 2
- eine Ausschnittsvergrößerung aus der Fig. 1 zur Darstellung des Druckvorgangs.
- 01
- Farbträger, erster; Zylinder
- 02
- Mantelfläche
- 03
- Absorptionsschicht
- 04
- Farbwerk, erstes
- 05
- -
- 06
- Farbauftragswalze
- 07
- Drucksubstanz, erste
- 08
- Bedruckstoff; Bogen; Materialbahn; Papierbahn
- 09
- Umlenkrolle, erste; Umlenkwalze
- 10
- -
- 11
- Strahlungsquelle, erste; Laser; Festkörperlaser
- 12
- Energiestrahl, erster
- 13
- Normale
- 14
- Strahlungsquelle, zweite; Laser; Festkörperlaser
- 15
- -
- 16
- Energiestrahl, zweiter
- 17
- Auftreffstelle
- 18
- Teil der Drucksubstanz; Tropfen
- 19
- Oberfläche der Drucksubstanz
- 20
- -
- 21
- Farbträger, zweiter; Zylinder
- 22
- Absorptionsschicht
- 23
- Farbwerk, zweites
- 24
- Farbauftragswalze, Walze
- 25
- -
- 26
- Drucksubstanz, zweite
- 27
- Normale
- 28
- Steuereinrichtung
- 29
- Umlenkrolle, zweite; Umlenkwalze
- 30
- -
- 31
- Umlenkrolle, dritte; Umlenkwalze
- 32
- Antrieb, Motor
- 33
- Antrieb, Motor
- 34
- Bildsensor
- a
- Abstand
- b
- Abstand
- α
- Winkel
- β
- Winkel
- v01
- Rotationsgeschwindigkeit (01)
- v81
- Transportgeschwindigkeit
- v21
- Rotationsgeschwindigkeit (21)
- v82
- Transportgeschwindigkeit
Claims (32)
- Druckmaschine mit mindestens zwei jeweils eine Drucksubstanz (07; 26) tragenden Farbträgern (01; 21), wobei jedem Farbträger (01; 21) eine von einer Steuereinrichtung (28) gesteuerte Strahlungsquelle (11; 14) zugeordnet ist, wobei jede Strahlungsquelle (11; 14) Strahlungsenergie zu mindestens einem der Farbträger (01; 21) entsendet, wobei von einem der Farbträger (01; 21) empfangene Strahlungsenergie eine Übertragung von zumindest einem Teil (18) der Drucksubstanz (07; 26) dieses Farbträgers (01; 21) auf einen von diesem Farbträger (01; 21) beabstandet angeordneten Bedruckstoff (08) beeinflusst, wobei die Farbträger (01; 21) in Transportrichtung des Bedruckstoffes (08) einander nachfolgend angeordnet sind, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Strahlungsquellen (11; 14) in Abhängigkeit von einer Transportdauer des Bedruckstoffes (08) zwischen den Orten der Übertragung der Drucksubstanz (07; 26) der jeweiligen Farbträger (01; 21) steuert und durch die Steuerung der Strahlungsquellen (11; 14) den sequentiellen Druck zu demselben Druckbild gehörender Farbauszüge miteinander synchronisiert.
- Druckmaschine mit mindestens zwei jeweils eine Drucksubstanz (07; 26) tragenden Farbträgern (01; 21), wobei jedem Farbträger (01; 21) eine von einer Steuereinrichtung (28) gesteuerte Strahlungsquelle (11; 14) zugeordnet ist, wobei jede Strahlungsquelle (11; 14) Strahlungsenergie zu mindestens einem der Farbträger (01; 21) entsendet, wobei von einem der Farbträger (01; 21) empfangene Strahlungsenergie eine Übertragung von zumindest einem Teil (18) der Drucksubstanz (07; 26) dieses Farbträgers (01; 21) auf einen von diesem Farbträger (01; 21) beabstandet angeordneten Bedruckstoff (08) beeinflusst, wobei die Farbträger (01; 21) jeweils als ein rotierender Zylinder (01; 21) ausgebildet und in Transportrichtung des Bedruckstoffes (08) einander nachfolgend angeordnet sind, dadurch gekennzeichnet, dass mindestens zwei Zylinder (01; 21) jeweils einen von der Steuereinrichtung (28) unabhängig voneinander gesteuerten Antrieb (32; 33) aufweisen, wobei die Steuereinrichtung (28) die Strahlungsquellen (11; 14) der verschiedene Farbauszüge desselben Druckbildes druckenden Zylinder (01; 21) in Abhängigkeit von der jeweiligen Winkellage dieser Zylinder (01; 21) steuert und durch die Steuerung der Antriebe (32; 33) und der Strahlungsquellen (11; 14) den sequentiellen Druck zu demselben Druckbild gehörender Farbauszüge miteinander synchronisiert.
- Druckmaschine mit mindestens zwei jeweils eine Drucksubstanz (07; 26) tragenden Farbträgern (01; 21), wobei jedem Farbträger (01; 21) eine von einer Steuereinrichtung (28) gesteuerte Strahlungsquelle (11; 14) zugeordnet ist, wobei jede Strahlungsquelle (11; 14) Strahlungsenergie zu mindestens einem der Farbträger (01; 21) entsendet, wobei von einem der Farbträger (01; 21) empfangene Strahlungsenergie eine Übertragung von zumindest einem Teil (18) der Drucksubstanz (07; 26) dieses Farbträgers (01; 21) auf einen von diesem Farbträger (01; 21) beabstandet angeordneten Bedruckstoff (08) beeinflusst, wobei die Farbträger (01; 21) in Transportrichtung des Bedruckstoffes (08) einander nachfolgend angeordnet sind, dadurch gekennzeichnet, dass die Farbträger (01; 21) sequentiell zumindest einen Teil eines gemeinsamen, aus mehreren Farbauszügen aufgebauten Druckbildes auf den Bedruckstoff (08) drucken, wobei ein Bildverarbeitungssystem zumindest einen Teil zumindest eines gedruckten Farbauszugs als ein Bild erfasst, wobei die Steuereinrichtung (28) in Abhängigkeit von dem von dem Bildverarbeitungssystem erfassten Bild mindestens eine Strahlungsquelle (11; 14) hinsichtlich der in den ihr zugeordneten Farbträger (01; 21) einzuleitenden Strahlungsenergie steuert.
- Druckmaschine nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass mindestens zwei Farbträger (01; 21) jeweils als ein rotierender Zylinder (01; 21) ausgebildet sind.
- Druckmaschine nach Anspruch 4, dadurch gekennzeichnet, dass mindestens zwei Zylinder (01; 21) jeweils einen von der Steuereinrichtung (28) unabhängig voneinander gesteuerten Antrieb (32; 33) aufweisen.
- Druckmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Strahlungsquellen (11; 14) der verschiedene Farbauszüge desselben Druckbildes druckenden Zylinder (01; 21) in Abhängigkeit von der jeweiligen Winkellage dieser Zylinder (01; 21) steuert.
- Druckmaschine nach Anspruch 2 oder 6, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Strahlungsquellen (11; 14) der verschiedene Farbauszüge desselben Druckbildes druckenden Zylinder (01; 21) in Abhängigkeit von der jeweiligen Rotationsgeschwindigkeit (v01; v21) dieser Zylinder (01; 21) steuert.
- Druckmaschine nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Strahlungsquellen (11; 14) der verschiedene Farbauszüge desselben Druckbildes druckenden Farbträger (01; 21) in Abhängigkeit von der Transportdauer des Bedruckstoffes (08) zwischen den Orten der Übertragung der Drucksubstanz (07; 26) dieser Farbträger (01; 21) steuert.
- Druckmaschine nach Anspruch 8, dadurch gekennzeichnet, dass die Steuereinrichtung (28) durch die Steuerung der Strahlungsquellen (11; 14) den sequentiellen Druck zu demselben Druckbild gehörender Farbauszüge miteinander synchronisiert.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Steuereinrichtung (28) zur Synchronisation der einander nachfolgend angeordneten, Farbauszüge desselben Druckbildes druckenden Farbträger (01; 21) Daten aus einer Druckvorstufe erhält.
- Druckmaschine nach Anspruch 1 oder 10, dadurch gekennzeichnet, dass die Daten der Druckvorstufe eine Sollposition zumindest eines der gedruckten oder zu druckenden Farbauszüge definieren.
- Druckmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass ein Bildverarbeitungssystem zumindest einen Teil zumindest eines gedruckten Farbauszugs als ein Bild erfasst.
- Druckmaschine nach Anspruch 3 oder 12, dadurch gekennzeichnet, dass das Bildverarbeitungssystem die Istposition zumindest des einen gedruckten Farbauszugs ermittelt.
- Druckmaschine nach Anspruch 1 oder 12, dadurch gekennzeichnet, dass das Bildverarbeitungssystem einen in Transportrichtung des Bedruckstoffes (08) vor dem Farbträger (01; 21) des zu druckenden Farbauszugs und/oder hinter dem Farbträger (01; 21) des gedruckten Farbauszugs angeordneten Bildsensor (34) aufweist.
- Druckmaschine nach Anspruch 14, dadurch gekennzeichnet, dass das Bildverarbeitungssystem in der Steuereinrichtung (28) integriert ist und der Bildsensor (34) sein Ausgangssignal zur Steuereinrichtung (28) leitet.
- Druckmaschine nach Anspruch 15, dadurch gekennzeichnet, dass die Steuereinrichtung (28) eine Intensität der auf den Farbträger (01 ; 21) zu richtenden Strahlungsenergie in Abhängigkeit vom Ausgangssignal des Bildsensors (34) steuert.
- Druckmaschine nach Anspruch 16, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Intensität der auf die Farbträger (01; 21) zu richtenden Strahlungsenergie durch eine Veränderung einer Dauer der Einleitung und/oder einer Amplitude der Strahlungsenergie steuert.
- Druckmaschine nach Anspruch 13, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die auf die Farbträger (01; 21) zu richtende Strahlungsenergie zeitlich zueinander versetzt einleitet, wenn die ermittelte Istposition eines gedruckten oder zu druckenden Farbauszugs von seiner Sollposition um mehr als einen zulässigen Toleranzwert abweicht.
- Druckmaschine nach Anspruch 13, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die Strahlungsquellen (11; 14) der verschiedene Farbauszüge desselben Druckbildes druckenden Zylinder (01; 21) in Abhängigkeit von der jeweiligen Winkellage dieser Zylinder (01; 21) steuert, wenn die ermittelte Istposition eines gedruckten Farbauszugs von seiner Sollposition um mehr als einen zulässigen Toleranzwert abweicht.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass alle Farbträger (01; 21) jeweils als ein rotierender Zylinder (01; 21) ausgebildet sind.
- Druckmaschine nach Anspruch 2 oder 5, dadurch gekennzeichnet, dass die Antriebe (32; 33) als ein elektrisch gesteuerter Motor ausgebildet sind.
- Druckmaschine nach Anspruch 2 oder 5, dadurch gekennzeichnet, dass die Antriebe (32; 33) koaxial zur Achse der Zylinder (01; 21) angeordnet sind.
- Druckmaschine nach Anspruch 2 oder 5, dadurch gekennzeichnet, dass die Antriebe (32; 33) mit der Achse der Zylinder (01; 21) steif verbunden sind.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Farbträger (01; 21) jeweils eine Absorptionsschicht (03; 22) aufweisen.
- Druckmaschine nach Anspruch 24, dadurch gekennzeichnet, dass die Absorptionsschicht (03; 22) eine vollflächig glatte Oberfläche aufweist.
- Druckmaschine nach Anspruch 24, dadurch gekennzeichnet, dass die Absorptionsschicht (03; 22) eine Oberfläche mit einer regelmäßigen oder unregelmäßigen Struktur aufweist.
- Druckmaschine nach Anspruch 26, dadurch gekennzeichnet, dass die Struktur aus Drucksubstanz (07; 26) aufnehmenden Näpfchen gebildet ist.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass dieselbe Strahlungsquelle (14) Strahlungsenergie zu mindestens zwei voneinander verschiedenen Farbträgern (01; 21) entsendet.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die jeweils auf den Farbträgern (01; 21) aufgetragene Drucksubstanz (07; 26) ein für ihr Farbmittel flüssiges Bindemittel aufweist.
- Druckmaschine nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass mit jeder Strahlungsquelle (11; 14) Strahlungsenergie in die auf dem der jeweiligen Strahlungsquelle (11; 14) zugeordneten Farbträger (01; 21) aufgetragene Drucksubstanz (07; 26) einleitbar ist, wobei in Drucksubstanz (07; 26) eingeleitete Strahlungsenergie zumindest einen Teil (18) dieser Drucksubstanz (07; 26) zu einer Übertragung auf einen von dem diese Drucksubstanz (07; 26) tragenden Farbträger (01; 21) beabstandet angeordneten Bedruckstoff (08) anregt.
- Druckmaschine nach Anspruch 30, dadurch gekennzeichnet, dass in Drucksubstanz (07; 26) eingeleitete Strahlungsenergie zumindest einen Teil (18) dieser Drucksubstanz (07; 26) unter Nutzung eines lichthydraulischen Effekts zu einer Übertragung auf den von dem diese Drucksubstanz (07; 26) tragenden Farbträger (01; 21) beabstandet angeordneten Bedruckstoff (08) anregt.
- Druckmaschine nach Anspruch 30, dadurch gekennzeichnet, dass die Steuereinrichtung (28) die von mindestens einer Strahlungsquelle (11; 14) in den ihr zugeordneten Farbträger (01; 21) einzuleitende Strahlungsenergie in ihrer Intensität steuert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102004022230A DE102004022230A1 (de) | 2004-05-04 | 2004-05-04 | Druckmaschinen mit einem eine Drucksubstanz tragenden Farbträger |
DE102004022230 | 2004-05-04 |
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EP1593513A2 true EP1593513A2 (de) | 2005-11-09 |
EP1593513A3 EP1593513A3 (de) | 2008-03-05 |
EP1593513B1 EP1593513B1 (de) | 2012-05-09 |
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EP05101653A Expired - Lifetime EP1593513B1 (de) | 2004-05-04 | 2005-03-03 | Druckmaschine mit mindestens zwei jeweils eine Drucksubstanz tragenden Farbträgern |
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EP (1) | EP1593513B1 (de) |
AT (1) | ATE556848T1 (de) |
DE (1) | DE102004022230A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007096746A2 (en) * | 2006-02-21 | 2007-08-30 | System S.P.A. | Decorating with powder material |
EP1759844A3 (de) * | 2005-09-02 | 2011-03-23 | Bosch Rexroth Aktiengesellschaft | Verfahren zur Druckkorrektur |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102013215638A1 (de) * | 2013-08-08 | 2015-02-12 | Krones Ag | Vorrichtung zum Bedrucken von Behältern |
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DE3702643A1 (de) | 1986-02-10 | 1987-08-13 | Toshiba Kawasaki Kk | Tintenstrahlschreiber sowie schreibkopf und schreibkopfkassette dafuer |
DE19746174C1 (de) | 1997-10-18 | 1999-07-08 | Udo Dr Lehmann | Druckverfahren und Einrichtung zu dessen Durchführung |
US6330857B1 (en) | 1995-06-20 | 2001-12-18 | Sergei Nikolaevich Maximovsky | Printing machine using laser ejection of ink from cells |
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JPH03146388A (ja) * | 1989-11-01 | 1991-06-21 | Kuwabara Yasunaga | 容器の多色印刷方法 |
US5412577A (en) * | 1992-10-28 | 1995-05-02 | Quad/Tech International | Color registration system for a printing press |
IL113702A0 (en) * | 1994-05-13 | 1995-08-31 | Advanced Vision Tech Ltd | General control for multiple color press devices |
DE19723059A1 (de) * | 1997-06-02 | 1998-12-03 | Wifag Maschf | Registerhaltige Abstimmung von Druckzylindern einer Rollenrotationsmaschine |
DE19727824C1 (de) * | 1997-06-30 | 1998-11-19 | Siemens Ag | Verfahren und Vorrichtung zum dezentralen Betrieb bzw. Aufbau einer autarken, winkelgenauen Gleichlaufregelung einzelner Antriebe eines vernetzten Mehrmotorenantriebssystems |
JP4353452B2 (ja) * | 2000-03-30 | 2009-10-28 | オウレンタム イノベーションズ テクノロジエン ゲーエムベーハー | 印刷方法 |
JP2002086772A (ja) * | 2000-09-14 | 2002-03-26 | Think Laboratory Co Ltd | 複数色転写印刷方法 |
EP1384580A1 (de) * | 2002-07-27 | 2004-01-28 | serv-o-tec Druck- und Papierverarbeitungsmaschinen GmbH | Verfahren sowie Vorrichtung zur Einstellung der Register einer Druckmaschine |
EP1567344B1 (de) * | 2002-12-06 | 2007-04-04 | Koenig & Bauer Aktiengesellschaft | Druckmaschinen mit mindestens einem farbträger |
-
2004
- 2004-05-04 DE DE102004022230A patent/DE102004022230A1/de not_active Withdrawn
-
2005
- 2005-03-03 AT AT05101653T patent/ATE556848T1/de active
- 2005-03-03 EP EP05101653A patent/EP1593513B1/de not_active Expired - Lifetime
Patent Citations (3)
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DE3702643A1 (de) | 1986-02-10 | 1987-08-13 | Toshiba Kawasaki Kk | Tintenstrahlschreiber sowie schreibkopf und schreibkopfkassette dafuer |
US6330857B1 (en) | 1995-06-20 | 2001-12-18 | Sergei Nikolaevich Maximovsky | Printing machine using laser ejection of ink from cells |
DE19746174C1 (de) | 1997-10-18 | 1999-07-08 | Udo Dr Lehmann | Druckverfahren und Einrichtung zu dessen Durchführung |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1759844A3 (de) * | 2005-09-02 | 2011-03-23 | Bosch Rexroth Aktiengesellschaft | Verfahren zur Druckkorrektur |
WO2007096746A2 (en) * | 2006-02-21 | 2007-08-30 | System S.P.A. | Decorating with powder material |
WO2007096746A3 (en) * | 2006-02-21 | 2008-05-29 | Mira Di Algeri Maris | Decorating with powder material |
US8337947B2 (en) | 2006-02-21 | 2012-12-25 | System S.P.A. | Decorating with powder material |
Also Published As
Publication number | Publication date |
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EP1593513A3 (de) | 2008-03-05 |
DE102004022230A1 (de) | 2005-12-08 |
ATE556848T1 (de) | 2012-05-15 |
EP1593513B1 (de) | 2012-05-09 |
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