EP0262475A2 - Machine pour l'impression - Google Patents
Machine pour l'impression Download PDFInfo
- Publication number
- EP0262475A2 EP0262475A2 EP87113140A EP87113140A EP0262475A2 EP 0262475 A2 EP0262475 A2 EP 0262475A2 EP 87113140 A EP87113140 A EP 87113140A EP 87113140 A EP87113140 A EP 87113140A EP 0262475 A2 EP0262475 A2 EP 0262475A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- machine according
- printing machine
- printing form
- electrode
- 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
Links
Images
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 that aligns 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 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. Such mats are particularly suitable as a printing form for flexographic printing.
- 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 cooperates with the forme cylinder (14) designed as a counter electrode.
- a controllable voltage (20) is applied to the pair of electrodes (14, 15), which voltage 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 is deleted with the heat source by creating a continuous depolarized or hydrophobic area on the printing form and the hydrophilic areas are generated by appropriate control of 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 (14) 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 so that the ferroelectric layer is continuously polarized with the erasing 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)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (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)
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 true EP0262475A2 (fr) | 1988-04-06 |
EP0262475A3 EP0262475A3 (en) | 1990-11-22 |
EP0262475B1 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) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0363932A2 (fr) * | 1988-10-14 | 1990-04-18 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Forme d'impression |
WO1991004153A1 (fr) * | 1989-09-13 | 1991-04-04 | Basf Aktiengesellschaft | Plaque d'impression offset produite par voie electrophotographique avec de regions hydrophiles colorees avec du toner et des regions oleophiles non colorees avec du toner |
EP0490105A1 (fr) * | 1990-12-07 | 1992-06-17 | MAN Roland Druckmaschinen AG | Dispositif pour la description selon une image d'une plaque d'impression |
EP0594097A1 (fr) * | 1992-10-20 | 1994-04-27 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Formes d'impression effaçables |
EP0639451A1 (fr) * | 1993-08-20 | 1995-02-22 | MAN Roland Druckmaschinen AG | Procédé d'impression utilisant des moyens ferroélectriques |
EP0693371A1 (fr) * | 1994-07-22 | 1996-01-24 | MAN Roland Druckmaschinen AG | Forme d'impression effaçables et procédé pour l'effaçement et la régénération des formes |
WO1997036746A1 (fr) * | 1996-03-29 | 1997-10-09 | Oce Printing Systems Gmbh | Procede pour imprimer un materiau support |
US5816161A (en) * | 1994-07-22 | 1998-10-06 | Man Roland Druckmaschinen Ag | Erasable printing plate having a smooth pore free metallic surface |
WO2000021753A1 (fr) * | 1998-10-10 | 2000-04-20 | Heidelberger Druckmaschinen Ag | Forme d'impression et procede permettant de modifier ses caracteristiques de mouillage |
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 |
Families Citing this family (23)
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 |
US5032849A (en) * | 1988-10-04 | 1991-07-16 | Canon Kabushiki Kaisha | Method for transferring a viscous substance whose adhesiveness is reduced when a voltage is applied thereto by disposing the viscous substance between and applying a voltage to first and second electrodes |
US5191834A (en) * | 1988-10-14 | 1993-03-09 | Man Roland Druckmaschinen Ag | Printing system with printing form having a ferro-electric layer |
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 |
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 |
DE9218056U1 (de) * | 1992-04-21 | 1993-06-03 | Albert-Frankenthal Ag, 6710 Frankenthal | Vorrichtung zum Erzeugen eines druckenden Musters auf einer Druckform-Hülse |
DE4303282C2 (de) * | 1993-02-05 | 2002-02-28 | Heidelberger Druckmasch Ag | Vorrichtung zur Feuchtmittelzufuhr bei einer Offsetdruckmaschine |
US5713287A (en) * | 1995-05-11 | 1998-02-03 | Creo Products Inc. | Direct-to-Press imaging method using surface modification of a single layer coating |
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 |
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 |
WO2010029342A1 (fr) | 2008-09-12 | 2010-03-18 | J P Imaging Limited | Améliorations apportées ou relatives à une impression |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
AU4413585A (en) * | 1984-06-28 | 1986-01-02 | Milliken Research Corporation | Fine resolution corona for lithographic imaging |
-
1986
- 1986-10-03 DE DE19863633758 patent/DE3633758A1/de not_active Withdrawn
-
1987
- 1987-09-09 EP EP87113140A patent/EP0262475B1/fr not_active Expired - Lifetime
- 1987-09-09 DE DE87113140T patent/DE3788102D1/de not_active Expired - Fee Related
- 1987-09-30 US US07/103,428 patent/US4833990A/en not_active Expired - Lifetime
- 1987-10-02 DD DD87307561A patent/DD262396A5/de not_active IP Right Cessation
- 1987-10-02 JP JP24965887A patent/JPH0751349B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
APPLIED PHYSICS LETTERS. vol. 23, no. 2, 15 Juli 1973, NEW YORK US Seiten 57 - 59; C.E.Land et al.: "Reflective-mode ferroelectric-photoconductor image storage and display devices" * |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0363932A3 (fr) * | 1988-10-14 | 1990-11-22 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Forme d'impression |
EP0363932A2 (fr) * | 1988-10-14 | 1990-04-18 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Forme d'impression |
WO1991004153A1 (fr) * | 1989-09-13 | 1991-04-04 | Basf Aktiengesellschaft | Plaque d'impression offset produite par voie electrophotographique avec de regions hydrophiles colorees avec du toner et des regions oleophiles non colorees avec du toner |
EP0490105A1 (fr) * | 1990-12-07 | 1992-06-17 | MAN Roland Druckmaschinen AG | Dispositif pour la description selon une image d'une plaque d'impression |
EP0594097A1 (fr) * | 1992-10-20 | 1994-04-27 | M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft | Formes d'impression effaçables |
US5454318A (en) * | 1992-10-20 | 1995-10-03 | Man Roland Druckmaschinen Ag | Erasable printing form |
EP0639451A1 (fr) * | 1993-08-20 | 1995-02-22 | MAN Roland Druckmaschinen AG | Procédé d'impression utilisant des moyens ferroélectriques |
US6125756A (en) * | 1994-07-22 | 2000-10-03 | Man Roland Druckmaschinen Ag | Erasable printing plate having a smooth pore free ceramic or glass surface |
EP0693371A1 (fr) * | 1994-07-22 | 1996-01-24 | MAN Roland Druckmaschinen AG | Forme d'impression effaçables et procédé pour l'effaçement et la régénération des formes |
US5816161A (en) * | 1994-07-22 | 1998-10-06 | Man Roland Druckmaschinen Ag | Erasable printing plate having a smooth pore free metallic surface |
US6016750A (en) * | 1994-07-22 | 2000-01-25 | Man Roland Druckmaschinen Ag | Erasable printing plate and a process and apparatus for erasing and regenerating the printing plate |
WO1997036746A1 (fr) * | 1996-03-29 | 1997-10-09 | Oce Printing Systems Gmbh | Procede pour imprimer un materiau support |
US6125755A (en) * | 1996-03-29 | 2000-10-03 | Oce Printing Systems Gmbh | Process for printing a carrier material |
WO2000021753A1 (fr) * | 1998-10-10 | 2000-04-20 | Heidelberger Druckmaschinen Ag | Forme d'impression et procede permettant de modifier ses caracteristiques de mouillage |
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 |
Also Published As
Publication number | Publication date |
---|---|
EP0262475B1 (fr) | 1993-11-10 |
DE3788102D1 (de) | 1993-12-16 |
DD262396A5 (de) | 1988-11-30 |
JPS63102937A (ja) | 1988-05-07 |
DE3633758A1 (de) | 1988-04-07 |
US4833990A (en) | 1989-05-30 |
JPH0751349B2 (ja) | 1995-06-05 |
EP0262475A3 (en) | 1990-11-22 |
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