EP0572397A1 - Procede et dispositif d'impression d'informations variables - Google Patents

Procede et dispositif d'impression d'informations variables

Info

Publication number
EP0572397A1
EP0572397A1 EP19910910277 EP91910277A EP0572397A1 EP 0572397 A1 EP0572397 A1 EP 0572397A1 EP 19910910277 EP19910910277 EP 19910910277 EP 91910277 A EP91910277 A EP 91910277A EP 0572397 A1 EP0572397 A1 EP 0572397A1
Authority
EP
European Patent Office
Prior art keywords
printing
ink
ink carrier
magnetized
carrier
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Withdrawn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
EP19910910277
Other languages
German (de)
English (en)
Inventor
Ludwig Bartl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0572397A1 publication Critical patent/EP0572397A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses

Definitions

  • the present invention relates to a method and a device with which variable information can be printed under program control for each printing process.
  • the method according to the invention is particularly suitable for rotogravure technology, offset printing technology or for a combination of these printing techniques.
  • the invention further relates to a device for carrying out the method on the basis of the various printing techniques.
  • non-I pact printers which were propagated as the actual revolution in printing technology. They are magnetographic printers and ink jet printers.
  • the magnetographic printing process is used for the A black, magnetizable powder is used to record information, which is transferred from a programmable magnetic layer drum to a printing material, to which it is sintered by the application of heat or fixed by pressing force.
  • This method is good for addressing, coding or numbering Suitable and has already been integrated into the operation of printing material processing machines
  • an ink jet is sequenced and deflected in a program-controlled manner onto the printing material surface, where a raster image is then formed well suited for labeling G items, daily newspapers and magazines or labels. You have already been Machine manufacturers integrated in the operation of printing material processing machines.
  • the mechanical numbering units are not programmable.
  • the sequence of numbers is given mechanically or electronically. Addressing is therefore not possible using such numbering units.
  • these numbering units have a considerably increased risk of failure in comparison to the printing presses to which they are connected.
  • the printing powder graphic does not correspond to the standard in quality printing sought today in the printing process.
  • this method is significantly slower in comparison to the printing press speed and is therefore only little suitable for integration into the operation of a printing material processing machine.
  • the inkjet printers are rarely used either because of the coarse, raster-like resolution or because of the problems with ink drying and guidance in quality printing.
  • the present invention therefore has for its object to provide a method and an apparatus which the Overcome the disadvantages listed above and with which any variable information can be printed in program-controlled manner with each printing process in offset or gravure printing quality and at conventional printing speeds.
  • This variable information can be texts, photos or graphics of variable size.
  • the invention solves the problem with a method for printing variable information in gravure printing, wherein the ink vehicle is formed as wells matrix, wherein each individual dot of the matrix by Magnetisie ⁇ tion or demagnetization for each 'printing program-controlled individually in its color guide is varied.
  • the invention further solves the problem with a device for printing variable information using gravure printing technology, which is characterized in that there is an ink carrier which is designed as a matrix and that means are available with which each raster point of the matrix for each printing process can be individually varied in its color control by program control by magnetization.
  • Figure 1 is a schematic representation of a device for gravure in a side section
  • FIG. 2 shows a greatly enlarged, perspective view of the ink carrier with its cups in a partial side section
  • Figure 1 shows a device for programmable printing in a schematic side section. It is a 'one ' version for direct connection to a printing press, of which only the printing material 34 transported through it is indicated here.
  • the device has an information carrier 1 made of steel, aluminum, copper, ceramic or the like material.
  • this information carrier 1 has the shape of a drum 1, the surface of which is provided with fine, grid-shaped cups 46, which are then separated from fine webs. This forms a matrix which represents the actual printing ink carrier 2.
  • the means for controlling and executing the variable ink supply and other devices necessary for the operation of the method are grouped.
  • the labeling includes a magnetization of the wells 46, which form the individual grid points of the matrix. Depending on whether a single well 46 is magnetized, it will later lead to printing ink or not.
  • the writing device 3 consists of writing heads 8, which consist of rows, which extend over the entire width of the drum 1 and are arranged in a writing head strip, or of an optoelectronic diode system 9.
  • the individual cells are made by means of this writing device 3 .
  • 46 of the matrix formed by the printing ink carrier 2 is labeled with electrical current. This electrical control of the ink guide will be described in detail later.
  • the wells 46 which are not intended to guide the color are activated, which are then clogged or filled with a special medium so that they cannot take up any printing ink. In another embodiment, this can be the other way round, so that the activated cups 46 receive a magnetic printing ink and the non-activated ones do not.
  • the medium feed device 4 is used to fill magnetizable medium into each of the wells 46 which are not provided for guiding printing ink in the current printing process.
  • a magnetic dipping roller 12 rotates in a medium container 14, which contains magnetizable medium, so that the magnetic dip roller 12 is partially immersed in this medium.
  • the magnetic dipping roller 12 consists of a core made of aluminum, coated with a magnetic layer of magnetic particles of Gama-Fe 2 0 3 distributed in polymer (polyarylate).
  • the magnetic pan roller 12 contacts a Mediumauf ⁇ support roller 11, which 'has a less magnetically coated surface or a plastic surface layer as Jerusalem ⁇ .
  • the adhesive forces of the plastic layer or the attractive forces of the magnetically coated surface are stronger than the cohesive forces of the magnetizable medium, but at the same time weaker than the magnetic attractive force in the previously activated by means of the writing heads 8, not for pressure or not well 46 intended for guiding printing ink.
  • the medium application roller 11 is located in a contactless manner in the immediate vicinity of the printing ink carrier 2 and brings the magnetizable medium from the magnetic dipping roller 12 onto the drum surface. So that there is certainly no magnetizable medium left on the webs between the cups 46, a cleaning roller 13 is connected in the running direction of the drum 1. This cleaning roller 13 is driven separately and its running speed is adjustable. It approaches the other side of the magnetic dip roller 12 and advantageously runs at a somewhat higher peripheral speed than the drum 1. It is also magnetized, but somewhat weaker than the magnetic dip roller 12. The medium particles are therefore attracted by the more magnetized magnetic dip roller 12 and again in the medium container 14 brought back.
  • the wells 46 intended for printing are filled with printing ink with the aid of the ink supply device 5.
  • This consists of an ink container 15, for example a Rilsan-coated inking roller 16, which transfers the ink into the empty wells via a settable, rubber or fabric-coated inking roller 17 46 of the information carrier 1 transmits.
  • the drum surface is further cleaned by means of, for example, a negatively directed doctor blade 18, which is pressed against the drum 1 by means of a tension spring 19 in order to keep the webs clean. In this way , a surface is created from the drum surface with the ink-bearing, printing areas and the medium-bearing, non-printing areas.
  • An erasing device 20 is next arranged in the running direction of the drum 1.
  • demagnetization can take place by building up a magnetic field directed against the current magnetization, with high-frequency alternating current or by heating the drum above the Curie temperature.
  • the magnetizable medium which has been introduced into the wells 46 not intended for printing is no longer held therein.
  • the quenching device 20 is now followed by a medium transport device 6, which consists of a magnetically coated transport roller 21, a doctor blade 22 and a medium container 23.
  • the transport roller 21 over takes the magnetizable medium as well as any ink mixed with it by means of magnetic forces, which inevitably was applied over the well 46 filled with the magnetizable medium.
  • the doctor blade 22 strips this mixture from the transport roller 21 and it reaches the medium container 23.
  • the magnetizable medium is separated from the printing ink again by means of a magnetic field or by means of a solvent and thus recycled for further printing processes. It then gets back into the medium container 14.
  • the drum 1 only carries in certain cups 46 . Printing ink with, namely in those that were not initially magnetized by the writing device 3. With this removal of the magnetic medium, it is possible to convert the ink carrier 2 into a printing form that can be used for printing.
  • a matrix of the ink-bearing points previously determined by the program is now stored on the drum surface, which has become similar to a gravure cylinder surface known in the printing process.
  • the drum 1 is now ready for printing, which also takes place when it comes into contact with the printing material 34. After ink transfer, about 15% residual ink can remain on the ink-bearing surfaces. These remaining color particles must be removed by means of cleaning before a new information recording is carried out.
  • This cleaning consists of several steps and advantageously uses a combination of pneumatic and mechanical means. In the running direction of the drum 1 to the point where the printing takes place, a cleaning device 7 is arranged for this purpose.
  • It consists of an air chamber 25, a pressure nozzle 26, a suction nozzle 27, a blowing nozzle 28 and a capillary 29 for the supply of a solvent.
  • a compressed air flow generated with the aid of a compressor is conducted via the capillary 29 to the surface to be cleaned.
  • the solvent is in this capillary 29.
  • the vacuum created by the speed of the compressed air flow causes the solvent mist to be entrained.
  • the divided air chamber 25 made of sheet metal, in the . Druck ⁇ the nozzle 26 for the solvent mist, the Saugdüs 'e' are housed 27 for the transporting away of the ink-solvent mixture to the collecting tank 30 and the blow nozzle 28 for drying the gerei ⁇ -adjusted surface.
  • the nozzles have slit-shaped openings.
  • a pair of washing rollers consisting of an electrostatically charged, cleaning soft roller 31 and a hard roller 32 doctored by means of a negative doctor 33.
  • the cleaning methods can be modified as required. In this way, cleaning is carried out either only with the pneumatic means or only with the mechanical means.
  • the information carrier 1 it is also possible to design the information carrier 1 not only as a drum, but also as a reciprocating plate, or to use a plate stretched on the drum or a running belt. Further embodiments of the subject matter of the invention provide that the printing ink from chamber doctor blades and the magnetic medium are by means of penumatic agents.
  • a particularly expedient solution is the connection and connection of the device according to the invention directly to a continuously running printing press.
  • a separate drive motor and compressor can thus be dispensed with and the work cycle and the control signals can be derived from the printing press.
  • FIG. 2 shows the ink carrier 2 of the device according to FIG. 1 on a greatly enlarged scale.
  • This printing ink 'carrier 2 has in the illustrated embodiment of the device to wells näpfchenförmige 46th
  • These cells 46 are of course of a much smaller dimension than shown here. For example, they can have a diameter of approximately the order of magnitude of 20 to 100 micrometers, and their depth also ranges from approximately 5 to 30 micrometers.
  • the cups 46 advantageously have a shape which is similar to that of the depressions in a conventional low-pressure cylinder. Most of the time this shape corresponds to the negative of an overturned pyramid with rounded side edges and flattened tip. However, other shapes, for example the negative shapes of spherical segments or similar shapes, can also be used.
  • the ink carrier 2 can form both a printing plate and a printing cylinder.
  • a flexible pressure plate is also conceivable, which can then be clamped onto a drum 1.
  • these have a material layer 47 which consists of a magnetizable material.
  • a magnetizable material it is, for example, a cobalt-containing material that can be vapor-deposited, for example, into such a layer or can be applied by epitaxy, cathode sputtering, by means of a mask process or another known technique.
  • the magnetizable layer is covered here with a thin film 48, for example with chrome or titanium nitride.
  • a thin film 48 for example with chrome or titanium nitride.
  • the arrangement of the cups 46 on the ink carrier 2 forms rows or rows 49 and columns or tracks 45, so that one can speak of an actual cup matrix. A grid point is clearly defined by each well 46.
  • Each column 45 of halftone dots is now electrically controlled individually by the writing device 3.
  • the write heads 8 consist, for example, of a magnetized Mu metal SiO 2 sandwich which is surrounded by a Cu layer acting as an induction coil and which write heads 8 are enclosed in a glass substrate.
  • the writing heads 8 can be arranged in a whole row, which extends over the entire width of the information carrier 1, so that they correspond to a row of cells 46.
  • the two ends of each sandwich core which, depending on the nature of the magnetizable layer, are at a distance of about 2 to 20 micrometers are positioned for activating or magnetizing the inside of the wells 46 or their magnetizable layer 47 above or below them.
  • the cells can be aggravated by means of one or more diodes.
  • Other known means for establishing a magnetic field can also be used.
  • step by step below When writing on the ink carrier 2 by means of the writing heads 8, a magnetic attraction develops in the activated cells 46, which initially has a non-printing effect , for a temporary stay in the well 46 certain magnetizable medium fixed, for example ferrite powder.
  • the presence of the medium in the Activated cells 46 prevent the penetration of printing ink into the cells 46, which are not provided for this purpose in the program.
  • the thin-film 48 in turn prevents the magnetizable medium from adhering, which must be removed from the cells 46 after the temporary stay.
  • the boundary surface phenomena of the touching materials must be properly coordinated with one another for this purpose.
  • the thin layer film 48 is at the same time partially color-friendly to the printing ink.
  • the magnetizable medium and the printing ink are supplied with the aid of application rollers, dipping rollers and transport rollers and the magnetizable medium is removed again.
  • the magnetic particles possibly remaining on the webs migrate via the cleaning roller 13 to the magnetic immersion roller 12.
  • the ink carrier 2 is demagnetized by means of the erasing device 20 and the magnetizable medium is transported away.
  • the magnetizable medium Before the magnetizable medium is returned to the medium container 14, it is in the magnetic field of a preferably permanent magnet and by means of a solvent of ink residues cleaned in a levitation tank 24.
  • a further possibility of effecting the magnetization or demagnetization of very specific, individually controllable points of a pressure matrix uses the Curie effect.
  • the magnetic layer in all the wells is magnetized using a stationary magnetic field.
  • Those wells that are intended to take up color instead of a magnetizable medium are demagnetized before the magnetizable medium is attracted.
  • This demagnetization can be carried out by local heating above the Curie temperature using, for example, a series of laser diodes.
  • one laser element per track or one device for deflecting the laser can be used.
  • the density in the direction of rotation is determined by the light wavelength, the track spacing by the spacings of the laser diodes, which can be kept smaller than 50 ⁇ m. However, this makes it possible to achieve a fine
  • the printed product which is combined from a repetitive print of the printing form and one or more variable information, is produced according to the invention in one work step.
  • ned newspapers, magazines, and letters or advertising material can in one operation abon ⁇ be printed and addressed encoded checks and personalized ⁇ sheet to be printed documents or banknotes and numbered.
  • Another modification of the design concept is the connection of the device according to the invention to a printed fabric processing machine that completes the manufacturing process.
  • the variable information is then printed, for example addressed, on the finished product by means of this device.
  • the device can be designed as an independent, continuously running EDP line printing device which is suitable for variable fast printing in printing quality similar to gravure or offset printing.

Landscapes

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

Abstract

Un procédé permet d'imprimer de manière programmable des informations variables sur un support d'impression (34), avec une qualité du type de la rotogravure. Le support (2) de l'encre d'impression se présente sous forme d'une matrice à coupelles dont chaque point de la grille peut être commandé avec du courant électrique afin de déterminer la quantité d'encre amenée à chaque point. L'actionnement, commandé par programme, avec du courant électrique modifie directement ou indirectement la quantité d'encre amenée au support (2) de l'encre d'impression. Le dispositif comprend des éléments de guidage et de régulation de l'encre d'impression amenée par le rouleau encreur (17).
EP19910910277 1990-05-31 1991-05-30 Procede et dispositif d'impression d'informations variables Withdrawn EP0572397A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1852/90 1990-05-31
CH185290 1990-05-31

Publications (1)

Publication Number Publication Date
EP0572397A1 true EP0572397A1 (fr) 1993-12-08

Family

ID=4220112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910910277 Withdrawn EP0572397A1 (fr) 1990-05-31 1991-05-30 Procede et dispositif d'impression d'informations variables

Country Status (3)

Country Link
EP (1) EP0572397A1 (fr)
AU (1) AU7970591A (fr)
WO (1) WO1991018743A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4792860A (en) * 1987-02-27 1988-12-20 Kuehrle Manfred R Thermodynamic printing method and means
DE3835091A1 (de) * 1988-10-14 1990-04-19 Roland Man Druckmasch Druckform
DE3836931C2 (de) * 1988-10-29 1993-11-04 Roland Man Druckmasch Druckform fuer eine druckmaschine mit wiederholt aktivierbaren und loeschbaren bereichen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9118743A1 *

Also Published As

Publication number Publication date
WO1991018743A1 (fr) 1991-12-12
AU7970591A (en) 1991-12-31

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