EP0262475B1 - Machine pour l'impression - Google Patents

Machine pour l'impression Download PDF

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Publication number
EP0262475B1
EP0262475B1 EP87113140A EP87113140A EP0262475B1 EP 0262475 B1 EP0262475 B1 EP 0262475B1 EP 87113140 A EP87113140 A EP 87113140A EP 87113140 A EP87113140 A EP 87113140A EP 0262475 B1 EP0262475 B1 EP 0262475B1
Authority
EP
European Patent Office
Prior art keywords
printing
machine according
printing machine
ferroelectric
printing forme
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.)
Expired - Lifetime
Application number
EP87113140A
Other languages
German (de)
English (en)
Other versions
EP0262475A2 (fr
EP0262475A3 (en
Inventor
Alfred Dr. Dipl.-Phys. Hirt
Hartmut Dipl.-Phys. Fuhrmann
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0262475A2 publication Critical patent/EP0262475A2/fr
Publication of EP0262475A3 publication Critical patent/EP0262475A3/de
Application granted granted Critical
Publication of EP0262475B1 publication Critical patent/EP0262475B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1058—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by providing a magnetic pattern, a ferroelectric pattern or a semiconductive pattern, e.g. by electrophotography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/006—Printing plates or foils; Materials therefor made entirely of inorganic materials other than natural stone or metals, e.g. ceramics, carbide materials, ferroelectric materials

Definitions

  • the invention relates to a printing press which is equipped with a printing form on which an image to be printed can be represented by corresponding phydrophobic and hydrophilic areas and means are provided with which the hydrophobic or hydrophilic areas can be reconfigured.
  • printing forms are used which are distinguished by the fact that the surface properties of the printing form material differ between printing and non-printing areas.
  • water-accepting (hydrophilic) and water-repellent (hydrophobic) areas are created, which after moistening and coloring with oleophilic printing ink are transferred to the print material using a rubber blanket.
  • the printing forms are formed as thin plates which are produced outside the printing press in several photolithographic process steps. They have to be inserted, adjusted and retracted into the press before printing. This results in downtimes and waste during the run-in process. Changes to the pattern to be printed on the printed matter can only be achieved by changing the printing form.
  • a printing form has become known (EP 101266) which consists of a hydrophilic layer and a hydrophobic layer which can be applied in the printing press.
  • a controlled with the help of coded print information Laser beam removes the areas of the hydrophobic layer corresponding to the image to be printed.
  • the hydrophobic layer is newly formed with every image change within the printing press.
  • the invention has for its object to find a method for producing a printing form, in which the wetting properties of the printing form can be selectively switched in a simple, quick and as often as possible repeatable manner, these properties should not change during a repeated printing process.
  • Ferroelectric materials have the property that, owing to their structural molecular structure, they have a permanent, electrical dipole moment which is aligned in the field direction in an external field. Macroscopically, this property shows up as electrical Polarization, which can only be changed in its direction by applying a correspondingly large opposing field.
  • Curie point the point of maximum temperature for the ferroelectrics, at which the ferroelectric properties disappear due to thermal movement and an element that is non-polar to the outside is formed.
  • hydrophilization or rehydrophilization of a printing form with ferroelectric properties is therefore carried out by means of a polarizing or depolarizing mechanism, which is reversible and can be carried out unlimited times within the printing press.
  • Another advantage of the invention is that the wetting effect is not based on monomolecular surface properties, but on far-reaching electrostatic attractive forces. Thin, dielectric contamination or paint layers therefore do not pose any difficulties in the reversal process, since the electrical field strength is only insignificantly influenced thereby.
  • the printing form can consist of a thin film or a layer on a printing form support, which is vapor-deposited or applied to the printing form by other known methods.
  • a ferroelectric material which is designed as a film or layer is suitable as the material.
  • a composite material mixed with ferroelectric microcrystals can be used.
  • a printing form is also suitable which contains a ferroelectric layer to which a thin layer of hydrophobic material is applied.
  • a pair of electrodes and a heat source are provided for the transformation of the polarization areas of the printing form, which can be controlled by means of an information transmission unit.
  • the information transmission unit includes known systems, such as full-page electrical, full-page assembly systems, facsimile transmission systems, computer control, microprocessors, which output signals for controlling the heat source and the electrode pairs in accordance with the image information.
  • the pair of electrodes can be designed in a variety of ways. Simple designs consist in the fact that a line electrode or one or more point electrodes cooperate with the printing form carrier designed as a counter electrode. With such pairs of electrodes, the printing form is polarized line by line or point by point. Depending on the type of polarization process, the associated heat source is used, which is used for depolarization. IR lasers, lasers, concentrated light sources, heated pens and the like can be used as heat sources. A selective heat source is used in conjunction with a linear electrode, ie previous printing patterns are deleted with the electrode. With the selective heat source, a new print pattern is introduced. However, the opposite way is also possible, ie the deletion is carried out with a linear heat source, while the rewriting is carried out with a punctiform electrode.
  • the depolarization can take place by the action of a larger alternating electrical field.
  • a further possibility of being able to carry out the rewriting process without a heat source is to use an electrode for generating an electrical field which polarizes the ferroelectric film of the printing form and a second electrode with which a corresponding field can be generated for the polarization of the ferroelectric layer.
  • This electrode is punctiform and is used to mark the print pattern.
  • the property is used that in areas of different polarization the outward free interfacial energy is changed in such a way that the wetting properties of the ferroelectric for polar (e.g. water) or non-polar fluids (e.g. printing ink) change drastically will.
  • Another solution is to use two pen electrodes, one for selective "erasing” and the other for selective "writing”. This also allows partial changes to be made to the printing pattern on the printing form. This can also be achieved with a point electrode in cooperation with a point heat source.
  • ink transfer cylinders of a printing press are shown in cross section, which works according to the flat printing or offset printing process.
  • the paper (10) to be printed is guided between a printing cylinder (11) and a rubber cylinder (12) and takes up the printing ink applied to the rubber cylinder (12).
  • the color distributed according to a typeface or a graphic representation is transferred from a printing form (13) to the rubber cylinder (12).
  • the printing form (13) is located on a likewise rotatable form cylinder (14).
  • the printing form (13) consists of a ferroelectric material, such as. B. barium titanate, which is applied as a coating on the forme cylinder (14).
  • the ferroelectric layer can be applied to a film and to apply this coated film as a printing form to the forme cylinder (14).
  • the printing form can also be produced as a film made of ferroelectric material.
  • Another way of producing a printing form with ferroelectric properties is to use a base material, e.g. B. a composite material with hydrophobic properties, such as. B. soft plastic mats are included in the ferroelectric microcrystallites.
  • the wetting properties of a ferroelectric for polar and nonpolar fluids is determined by the polarization of the ferroelectric.
  • the polarization of the ferroelectric can be aligned or the ferroelectric can be depolarized by a suitable choice of the field properties.
  • Depolarization can also be achieved by heating the ferroelectric material above the Curie point.
  • the Curie temperature is at 120 ° C.
  • a flat electrode (15) with a line tip (16) is provided which interacts with the forme cylinder (14) designed as a counter electrode.
  • a controllable voltage (20) is present at the pair of electrodes (14, 15), which is controlled by an information transmission unit (21).
  • the information transmission unit (21) consists, in a known manner, of information carriers (22) located in the editorial office and a control unit (23) located in the printing press.
  • the voltage (20) is applied to the electrodes (14, 15) without switching off the printing press. Due to the electrical field building up between the line tip (16) and the counterelectrode (14), the printing form that roams this field is polarized, ie a continuous hydrophilic area (24) is created.
  • a point beam is applied to the printing form (13) by means of a heat source (25) arranged in the direction of rotation of the forme cylinder (14) after the electrode (15) and designed as a radiation source (26) directed, which heats the irradiated point above the Curie temperature of the corresponding ferroelectric material and thus depolarizes or converts it into a hydrophobic state.
  • the radiation source (25) is also controlled by the information transmission unit (21) in such a way that the radiation source (25) is moved back and forth in the longitudinal direction of the forme cylinder (14) and only there according to the pressure information from the system (22) outputs a beam on which a pixel is provided.
  • the rewriting process can be reversed by rotating the forme cylinder (14) in the opposite direction, forming the heat source as a line jet and the electrode in a punctiform manner. In such a case, a previous print pattern with the heat source is deleted by creating a continuous depolarized or hydrophobic area on the printing form and the hydrophilic areas are generated by correspondingly controlling the electrode pin.
  • FIG 3 shows an embodiment in which, instead of a heat source, a second electrode (30) is provided, with which the transcriptions are made in cooperation with the first electrode (15) and the forme cylinder designed as a counter electrode.
  • the tip of one electrode is point-shaped for the "writing process” and the other is linear for the "erasing process”.
  • the two electrodes (15 and 30) can be controlled such that the ferroelectric layer is continuously polarized with the quenching electrode, while the second, pin-like electrode with a correspondingly high voltage reverses polarization is performed, which lead to hydrophilic areas.
  • Another way to create the hydrophilic pattern is to use a high frequency AC voltage. The alternating field generated in this way depolarizes the polarized ferroelectric layer at the relevant points.
  • both electrodes (15 and (30)) would have a punctiform design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Rotary Presses (AREA)
  • Printing Methods (AREA)
  • Electronic Switches (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Claims (14)

  1. Presse à imprimer qui est équipée d'une forme d'impression (13) sur laquelle une image à imprimer peut être représentée par des régions hydrophobes et hydrophiles correspondantes, et dans laquelle il est prévu des moyens à l'aide desquels on peut changer la forme des régions hydrophobes et hydrophiles, caractérisée en ce que la forme d'impression (13) contient une matière possédant des propriétés ferro-électriques qui peut être polarisée ou dépolarisée localement à l'aide des moyens précités.
  2. Presse à imprimer selon la revendication 1, caractérisée en ce que la forme d'impression est une feuille (13) de matière ferro-électrique.
  3. Presse à imprimer selon la revendication 1, caractérisée en ce que la forme d'impression (13) possède une enduction de matière ferro-électrique.
  4. Presse à imprimer selon la revendication 1, caractérisée en ce que la forme d'impression (13) est composée d'une matière composite contenant des cristaux ferro-électriques.
  5. Forme d'impression selon une des revendications 1 et 4, caractérisée en ce que la forme d'impression est une couche (13) déposée sur un support (14) de forme d'impression.
  6. Presse à imprimer selon une des revendications précédentes, caractérisée en ce qu'il est prévu, comme moyens pour la transformation des régions de polarisation (24, 27), un couple d'électrodes (14, 15) et une source de chaleur (25) qui peuvent être pilotées au moyen d'une unité (21) de transmission d'information.
  7. Presse à imprimer selon la revendication 6, caractérisée en ce qu'il est prévu une électrode plate (15) possédant une pointe d'électrode de forme linéaire (16) dont la longueur correspond à la largeur de la forme d'impression (13) et qui coopère avec un support de forme d'impression (14) qui forme une contre-électrode.
  8. Presse à imprimer selon la revendication 6, caractérisée en ce qu'il est prévu une électrode se terminant en pointe qui coopère avec un support de forme d'impression qui constitue la contre-électrode.
  9. Presse a imprimer selon une des revendications 6 à 8, caractérisée en ce que la source de chaleur émet un rayon de forme linéaire.
  10. Presse à imprimer selon la revendication 9, caractérisée en ce que le rayon de forme linéaire peut être piloté de façon ponctuelle.
  11. Presse à imprimer selon une des revendications 6 à 8, caractérisée en ce qu'il est prévu une source de chaleur (25) émettant un rayon ponctuel (26).
  12. Presse à imprimer selon une des revendications 1 à 5, caractérisée en ce qu'il est prévu, comme moyen pour transformer les régions de polarisation (24, 27), des électrodes (14, 15, 30) pouvant être pilotées par des systèmes de transmission d'information.
  13. Presse à imprimer selon une des revendications précédentes, caractérisée ce que le couple d'électrodes ou un couple d'électrodes est attaqué par un courant alternatif.
  14. Presse à imprimer selon la revendication 1, caractérisée en ce que la forme d'impression renferme une couche ferro-électrique sur laquelle est déposée une mince couche d'une matière hydrophobe.
EP87113140A 1986-10-03 1987-09-09 Machine pour l'impression Expired - Lifetime EP0262475B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3633758 1986-10-03
DE19863633758 DE3633758A1 (de) 1986-10-03 1986-10-03 Druckmaschine

Publications (3)

Publication Number Publication Date
EP0262475A2 EP0262475A2 (fr) 1988-04-06
EP0262475A3 EP0262475A3 (en) 1990-11-22
EP0262475B1 true EP0262475B1 (fr) 1993-11-10

Family

ID=6311013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113140A Expired - Lifetime EP0262475B1 (fr) 1986-10-03 1987-09-09 Machine pour l'impression

Country Status (5)

Country Link
US (1) US4833990A (fr)
EP (1) EP0262475B1 (fr)
JP (1) JPH0751349B2 (fr)
DD (1) DD262396A5 (fr)
DE (2) DE3633758A1 (fr)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705439A1 (de) * 1987-02-20 1988-09-01 Man Technologie Gmbh Druckmaschine
US5041843A (en) * 1988-10-04 1991-08-20 Canon Kabushiki Kaisha Method and apparatus for transferring an adhesive viscous substance corresponding to the ratio of the area of an electroconduction portion of a pattern on one electrode to the area of an insulating portion of the pattern of the electrode
EP0364144A3 (fr) * 1988-10-04 1990-08-08 Canon Kabushiki Kaisha Méthode de transfert d'une substance visqueuse et son procédé de fabrication
US5191834A (en) * 1988-10-14 1993-03-09 Man Roland Druckmaschinen Ag Printing system with printing form having a ferro-electric layer
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
DE3911934C2 (de) * 1989-04-12 1995-08-24 Krause Biagosch Gmbh Offsetdruckform und Verfahren zur Herstellung dieser Druckform
US5132706A (en) * 1989-04-12 1992-07-21 Canon Kabushiki Kaisha Transferring ink with an adhesive characteristic changed by applied voltage and replacing component loss of ink in response to determined changes of ink
EP0409570A3 (en) * 1989-07-21 1991-09-18 Canon Kabushiki Kaisha Method of supplying viscous substance
DE3930584A1 (de) * 1989-09-13 1991-03-14 Basf Ag Auf elektrophotographischem wege hergestellte offsetdruckplatte mit hydrophilen betonerten bereichen und oleophilen unbetonerten bereichen
DE4039105C2 (de) * 1990-12-07 1994-12-08 Roland Man Druckmasch Vorrichtung zur bildmäßigen Beschreibung einer Druckform
DE4039107B4 (de) * 1990-12-07 2004-08-26 Man Roland Druckmaschinen Ag Vorrichtung zum bildmäßigen Beschreiben und Löschen einer Druckform
US5188033A (en) * 1991-07-08 1993-02-23 Rockwell International Corporation Direct-to-press imaging system for use in lithographic printing
US5129321A (en) * 1991-07-08 1992-07-14 Rockwell International Corporation Direct-to-press imaging system for use in lithographic printing
JP3311408B2 (ja) * 1992-04-20 2002-08-05 株式会社リコー 画像形成方法及び画像形成装置
DE4213013C2 (de) * 1992-04-21 1995-11-16 Frankenthal Ag Albert Vorrichtung zum Erzeugen eines zu druckenden Musters auf einer Druckform-Hülse
DE4235242C1 (de) * 1992-10-20 1993-11-11 Roland Man Druckmasch Löschbare Druckform
DE4303282C2 (de) * 1993-02-05 2002-02-28 Heidelberger Druckmasch Ag Vorrichtung zur Feuchtmittelzufuhr bei einer Offsetdruckmaschine
DE4328037A1 (de) * 1993-08-20 1995-03-02 Roland Man Druckmasch Druckverfahren mit Ferroelektrika
DE4426012C2 (de) 1994-07-22 1998-05-20 Roland Man Druckmasch Löschbare Druckform, ihre Verwendung sowie Verfahren zum Löschen und Regenerieren der Druckform
US5816161A (en) * 1994-07-22 1998-10-06 Man Roland Druckmaschinen Ag Erasable printing plate having a smooth pore free metallic surface
US5713287A (en) * 1995-05-11 1998-02-03 Creo Products Inc. Direct-to-Press imaging method using surface modification of a single layer coating
DE59701516D1 (de) * 1996-03-29 2000-05-31 Oce Printing Systems Gmbh Druckverfahren zum bedrucken eines trägermaterials
DE19624395A1 (de) * 1996-06-19 1998-01-02 Roland Man Druckmasch Rollenrotationsdruckmaschine
US5927206A (en) * 1997-12-22 1999-07-27 Eastman Kodak Company Ferroelectric imaging member and methods of use
DE19826377A1 (de) * 1998-06-12 1999-12-16 Heidelberger Druckmasch Ag Druckmaschine und Druckverfahren
DE19932071A1 (de) * 1998-07-22 2000-01-27 Heidelberger Druckmasch Ag Vorrichtung und Verfahren zur Bebilderung einer Druckform für eine Offsetdruckmaschine
DE19945847A1 (de) * 1998-10-10 2000-06-21 Heidelberger Druckmasch Ag Druckform und Verfahren zum Ändern ihrer Benetzungseigenschaften
AT407859B (de) * 1999-11-18 2001-07-25 Weber Casper Urban Flachdruckverfahren
DE10125257B4 (de) 2001-05-23 2005-08-11 Man Roland Druckmaschinen Ag Kurzfarbwerk für eine Rotationsdruckmaschine und Verfahren zur Verbesserung der Farbspaltung in einem solchen Kurzfarbwerk
US7121209B2 (en) * 2004-01-16 2006-10-17 Nandakumar Vaidyanathan Digital semiconductor based printing system and method
EP1995060A1 (fr) * 2007-05-22 2008-11-26 Ernst-Rudolf Dr. Weidlich Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression
DE102008028675A1 (de) * 2008-06-17 2009-12-24 Wifag Maschinenfabrik Ag Elektro- oder magnetorheologische Druckmaschine
EP2334496B1 (fr) 2008-09-12 2014-05-07 J P Imaging Limited Améliorations de l'impression ou améliorations relatives à l'impression

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US3406060A (en) * 1964-04-08 1968-10-15 Nashua Corp Electrophotographic process
US3358081A (en) * 1964-10-20 1967-12-12 Xerox Corp Facsimile printer with ferroelectric modulator
US3643014A (en) * 1967-03-07 1972-02-15 Molins Ltd Pip recording apparatus
US3550155A (en) * 1968-01-18 1970-12-22 Itt Printer using a solid state semiconductor material as a switch
US3530441A (en) * 1969-01-15 1970-09-22 Energy Conversion Devices Inc Method and apparatus for storing and retrieving information
US3698006A (en) * 1969-05-29 1972-10-10 Energy Conversion Devices Inc High speed printer of multiple copies for output information
US3651281A (en) * 1969-06-06 1972-03-21 Carl H Becker Laser recording system using photomagnetically magnetizable storage medium
US3659936A (en) * 1970-01-07 1972-05-02 Energy Conversion Devices Inc Apparatus for electrostatic printing
US3654864A (en) * 1970-01-16 1972-04-11 Energy Conversion Devices Inc Printing employing materials with variable volume
US3678852A (en) * 1970-04-10 1972-07-25 Energy Conversion Devices Inc Printing and copying employing materials with surface variations
US3651488A (en) * 1970-06-08 1972-03-21 Rca Corp Information storage system employing optical entry and removal of information
US3832718A (en) * 1973-01-19 1974-08-27 Gen Electric Non-impact, curie point printer
DE2340323C2 (de) * 1973-08-09 1984-09-13 Hoechst Ag, 6230 Frankfurt Verfahren zur Herstellung von Flachdruckformen
US3951533A (en) * 1974-09-20 1976-04-20 Xerox Corporation Color image reproduction system
CA1241053A (fr) * 1984-06-28 1988-08-23 Milliken Research Corporation Methode, appareil et produit d'imagerie

Also Published As

Publication number Publication date
EP0262475A2 (fr) 1988-04-06
EP0262475A3 (en) 1990-11-22
JPS63102937A (ja) 1988-05-07
DE3633758A1 (de) 1988-04-07
JPH0751349B2 (ja) 1995-06-05
DE3788102D1 (de) 1993-12-16
US4833990A (en) 1989-05-30
DD262396A5 (de) 1988-11-30

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