EP1362696B1 - Machine d'impression avec dispositif de raclage - Google Patents

Machine d'impression avec dispositif de raclage Download PDF

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Publication number
EP1362696B1
EP1362696B1 EP02011106A EP02011106A EP1362696B1 EP 1362696 B1 EP1362696 B1 EP 1362696B1 EP 02011106 A EP02011106 A EP 02011106A EP 02011106 A EP02011106 A EP 02011106A EP 1362696 B1 EP1362696 B1 EP 1362696B1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
oscillator
cylinder
doctor
printing press
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
EP02011106A
Other languages
German (de)
English (en)
Other versions
EP1362696A1 (fr
Inventor
Wilfried Dr. Kolbe
Klaus Schirrich
Andreas Kückelmann
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.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
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 Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to ES02011106T priority Critical patent/ES2272603T3/es
Priority to DE50208200T priority patent/DE50208200D1/de
Priority to EP02011106A priority patent/EP1362696B1/fr
Priority to US10/427,101 priority patent/US6752077B2/en
Priority to JP2003136779A priority patent/JP2003334920A/ja
Publication of EP1362696A1 publication Critical patent/EP1362696A1/fr
Application granted granted Critical
Publication of EP1362696B1 publication Critical patent/EP1362696B1/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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1009—Doctors, scrapers, or like devices with reciprocating movement

Definitions

  • the invention relates to a printing press with a squeegee device having an engageable against a cylinder doctor blade, and with an oscillator, which is an acoustic vibrator and the doctor blade vibrates at a frequency of at least 1 Hz.
  • doctor devices are generally used to doctor off the surface of a rotating cylinder, for example the printing cylinder, with the aid of a doctor blade.
  • a squeegee device in a gravure printing press has the function of smoothly doctoring off the smoothly polished surface of the gravure cylinder after inking and before the actual printing so that the ink remains only in the printing, recessed areas of the printing cylinder surface.
  • doctor blade a transverse movement transversely to the direction of rotation, ie in the axial direction of the printing cylinder.
  • the transverse component of the relative movement between doctor blade and pressure cylinder then helps to remove the impurities from the wells or to solve the doctor blade, so that they are washed away with the ink and do not even get into the wells of the printing cylinder.
  • the doctor blade is moved at a substantially constant speed in the axial direction.
  • the direction of movement must be reversed from time to time, typically a few seconds, in order for the doctor blade to perform only a limited stroke, for example of the order of a few millimeters or centimeters.
  • the larger this stroke the farther the doctor blade must survive beyond the ends of the impression cylinder.
  • a relatively complicated mechanism is required for the drive and the control of the transverse movement of the doctor blade so far a relatively complicated mechanism is required.
  • the supernatant of the doctor blade and its transverse movement cause ink drops from the ends of the doctor blade and must be collected with elaborate collecting devices.
  • JP 2000 085094 it is known to vary the contact pressure of a doctor blade with a frequency in the ultrasonic range of, for example, 20-100 kHz in order to reduce the wear of the doctor blade by the ink.
  • the contact pressure is varied between 0.07 and 0.58 kg / cm.
  • the position of the doctor blade does not change with respect to the swept surface of the rotating cylinder.
  • DE 39 07 483 A1 describes a rotatably driven roller doctor rod, which is employed with a thread-like applied wire wrapping to a paper web.
  • the squeegee bar is used tolockrakeln from an applied on the paper coating the excess part and so to smooth the coating layer.
  • the roller doctor rod is set in axial oscillations by means of a piezoelectric translator, an electromagnet or a hydraulic cylinder.
  • the roller doctor rod is used in a smoothing or metering device and is employed directly on a paper web.
  • the object of the invention is to provide a printing machine with doctor device, which can achieve a high print quality with a simplified structure.
  • the oscillator is formed by an acoustic oscillator which generates vibrations at the desired frequency in the infrasonic range (1 to 15 Hz), in the audible range (15 Hz to 20 kHz) or particularly preferably in the ultrasonic range.
  • the acoustic sound generator can be structurally very simple and can be formed for example by a conventional electromagnetic transducer or a piezoelectric transducer.
  • the oscillator can generate vibrations in the longitudinal direction of the doctor blade and those in the direction perpendicular to the plane of the doctor blade.
  • the stroke of the doctor blade is chosen smaller than the resolution of the human eye, for example, 0.2 mm or less, it is also ensured that the vibration of the doctor blade leaves no visible traces in the printed image.
  • the sound wave length is smaller than the length of the doctor blade, it may be appropriate to modulate the oscillation frequency or superimpose several inharmonic frequencies so that on the Length of the doctor blade no permanent nodes of vibration arise.
  • such nodes can also be suppressed by attenuating the sound waves at the opposite end of the doctor blade to the oscillator so that essentially no reflections are produced and instead of a standing wave, a running wave is obtained.
  • the gravure printing machine shown in FIG. 1 comprises a gravure cylinder 10, an applicator roll 12 and a impression roller 14, which are rotatably mounted between side parts 16, 18 of a machine frame.
  • Associated drive and control devices have not been shown here, as they are not essential to the understanding of the invention.
  • the applicator roller 12 is at its upper apex with the gravure cylinder 10 in contact and immersed with its lower apex in a paint tray 20, as can be seen more clearly in Figure 2.
  • the application roller 12 thus absorbs ink from the ink tray 20 and transmits it to the peripheral surface of the gravure cylinder 10, which rotates in the direction of arrow in Figure 2 and transfers the ink to a substrate web 22 which passes between the impression roller 14 and the gravure cylinder and through the impression roller is pressed against the gravure cylinder.
  • the gravure cylinder 10 is associated with a doctor device 24.
  • This doctor device is formed in a known manner by a doctor blade 26 which is attached to a holder 28.
  • the holder 28 is mounted on a shaft 30 which extends between two levers 32, 34.
  • the lower ends of the levers 34 sit on a rotatable shaft 36, with which the entire doctor device 24 can pivot against the circumference of the gravure cylinder 10 so that its surface is doctored off with the cutting edge of the doctor blade 26.
  • the ink absorbed by the applicator roller 12 is removed from the smooth, non-printing surface areas of the gravure cylinder 10 so that the ink remains only in the recessed areas that produce the printed image on the substrate web 22.
  • an oscillator 38 is inserted between the lever 34 and the holder 28, the holder 28 and thus also the doctor blade 26 in high-frequency oscillations in the direction parallel to the axis of the gravure cylinder 10, as indicated by a double arrow in Figure 1 becomes.
  • the oscillator 38 thus forms a transverse thrust device which generates a movement of the blade of the doctor blade 26 relative to the gravure cylinder 10 in the direction transverse to the direction of the printing material web 22, ie in the axial direction of the gravure cylinder.
  • the blade of the doctor blade 26 encounters dirt particles, they are released by the oscillation of the doctor blade and removed with the ink. In this way it is prevented that the printed image by permanently remaining in the wells of the gravure cylinder dirt particles is impaired.
  • the oscillation frequency of the oscillator 38 is for example in the ultrasonic range, so that the transverse vibrations of the doctor blade 26 have the shape of running ultrasonic waves propagating to the opposite end of the doctor blade and absorbed there by a inserted between the lever 32 and the holder 28 damper 40.
  • the lever 34, on which the oscillator 38 is directly supported, is designed to be particularly rigid in the example shown, so that the ultrasonic vibrations are effectively coupled into the holder 28 and the doctor blade 26.
  • transverse vibrations of the doctor blade are generated solely by means of the oscillator 38, no complicated drives and mechanisms for generating and controlling the transverse movement of the doctor blade are required. An effective generation of the transverse vibrations is also possible when the holder 28 is rigidly mounted on the shaft 30.
  • FIG. 3 shows, as a modified embodiment, a gravure cylinder 10 with a chamber doctor blade 42.
  • the doctor blade 26 is arranged inside the chamber doctor blade and is oscillated by the oscillator 38 predominantly in the direction perpendicular to the plane of the doctor blade, as indicated by a double arrow in FIG becomes.
  • the oscillator 38 may be arranged outside the chamber doctor blade so that the vibrations are transmitted to the doctor blade.
  • the invention is applicable not only to gravure printing machines but also to other printing machines.
  • the chambered doctor blade 42 would be disposed on the circumference of an anilox roller, the inner doctor blade 26 would be omitted, and instead the doctoring blade 26 'would vibrate, terminating the chambered blade at the rear end in the direction of rotation of the anilox roller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (7)

  1. Machine à imprimer avec un dispositif de raclage (24) qui comporte une lame de raclage (26) pouvant être ajustée contre un cylindre (10), et avec un oscillateur (38) qui est un transmetteur acoustique d'oscillations et qui fait osciller la lame de raclage (26) à une fréquence d'au moins 1 Hz, caractérisée en ce que l'oscillateur (38) produit une oscillation de la lame de raclage dans sa direction longitudinale.
  2. Machine à imprimer selon la revendication 1, caractérisée en ce que l'oscillateur (38) produit aussi une oscillation de la lame de raclage dans la direction perpendiculaire au plan de la lame de raclage.
  3. Machine à imprimer selon l'une des revendications précédentes, caractérisée en ce que l'oscillateur (38) est un oscillateur à ultrasons.
  4. Machine à imprimer selon l'une des revendications précédentes, caractérisée en ce que la course de l'oscillateur (38)est inférieure à 1 mm.
  5. Machine à imprimer selon la revendication 4, caractérisée en ce que la course de l'oscillateur (38) est inférieure à 0,2 mm.
  6. Machine à imprimer selon l'une des revendications précédentes, caractérisée en ce que la lame de raclage (26) fait partie d'une racle à chambre (42).
  7. Machine pour héliogravure selon l'une des revendications précédentes.
EP02011106A 2002-05-18 2002-05-18 Machine d'impression avec dispositif de raclage Expired - Lifetime EP1362696B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES02011106T ES2272603T3 (es) 2002-05-18 2002-05-18 Maquina de impresion con dispositivo de rascado.
DE50208200T DE50208200D1 (de) 2002-05-18 2002-05-18 Druckmaschine mit Rakelvorrichtung
EP02011106A EP1362696B1 (fr) 2002-05-18 2002-05-18 Machine d'impression avec dispositif de raclage
US10/427,101 US6752077B2 (en) 2002-05-18 2003-05-01 Printing press with a doctor blade device
JP2003136779A JP2003334920A (ja) 2002-05-18 2003-05-15 ドクターブレード装置を備えた印刷機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02011106A EP1362696B1 (fr) 2002-05-18 2002-05-18 Machine d'impression avec dispositif de raclage

Publications (2)

Publication Number Publication Date
EP1362696A1 EP1362696A1 (fr) 2003-11-19
EP1362696B1 true EP1362696B1 (fr) 2006-09-20

Family

ID=29265953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02011106A Expired - Lifetime EP1362696B1 (fr) 2002-05-18 2002-05-18 Machine d'impression avec dispositif de raclage

Country Status (5)

Country Link
US (1) US6752077B2 (fr)
EP (1) EP1362696B1 (fr)
JP (1) JP2003334920A (fr)
DE (1) DE50208200D1 (fr)
ES (1) ES2272603T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1717026A3 (fr) 2003-11-14 2007-05-02 Fischer & Krecke GmbH & Co. Procédé et dispositif pour déplacer une racle
JP4896461B2 (ja) * 2004-08-04 2012-03-14 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 印刷機
DK1683633T3 (da) * 2005-01-24 2011-12-05 Gallus Ferd Rueesch Ag Dybtrykværk til påtrykning af en påtrykningsstofbane i en trykkemaskine
DE102007009969B4 (de) * 2006-05-19 2017-07-06 Heidelberger Druckmaschinen Ag Verfahren zum Reinigen eines Anilox-Farbwerks
CN101870197B (zh) * 2009-04-23 2014-06-04 海德堡印刷机械股份公司 洗涤装置
US20110032306A1 (en) * 2009-08-04 2011-02-10 Xerox Corporation System for Reducing Metering Blade Wear in a Drum Maintenance Unit
DE102010054417A1 (de) * 2010-12-14 2012-06-14 Heidelberger Druckmaschinen Ag Vorrichtung zum Dosieren von Farbe in einer Druckmaschine
CN104589780B (zh) * 2015-01-12 2016-08-31 福建省晋江市佶龙机械工业有限公司 一种真蜡防染印花生产用的双面凹版印蜡机
US20170239937A1 (en) * 2016-02-24 2017-08-24 Paul Joseph ROMANELLI Apparatus includes housing assembly, mountable to printing machine cylinder, for supporting doctor blade and impression roller
WO2017182144A1 (fr) * 2016-04-22 2017-10-26 Bobst Italia S.P.A. Ensemble de racle avec support dans une unité d'impression par rotogravure

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
DE630567C (de) 1936-05-30 Ijzerhandel I M De Vries Nv Drueckerverbindung mit einem Kupplungsglied am Griffdorn
GB630567A (en) * 1945-10-03 1949-10-17 Hoe & Co R Improvements in doctor blade mechanism for use in rotary intaglio printing machines
US3113225A (en) * 1960-06-09 1963-12-03 Cavitron Ultrasonics Inc Ultrasonic vibration generator
US3087184A (en) * 1960-11-17 1963-04-30 Lodding Engineering Corp Vibratory doctor mechanism
US3105779A (en) * 1962-02-01 1963-10-01 Bendix Corp Sonic cleaning method
DE1252706B (de) * 1966-03-05 1967-10-26 Philips Patentverwaltung GmbH, Hamburg Vorrichtung zum Einfärben gerasteter Flachen z B von Tiefdruckformen, mit trockenen Pulvern
DE2257102A1 (de) * 1972-11-21 1974-05-22 Europ Rotogravure Ass Verfahren zur beseitigung des vom farbwerk uebertragenen farbueberschusses auf tiefdruckzylindern mittels rakel
US4625676A (en) * 1982-02-17 1986-12-02 Ricoh Company, Ltd. Developing device
DE3220845C2 (de) * 1982-06-03 1985-02-21 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Antrieb einer Rakeleinrichtung
IT1176525B (it) * 1984-08-01 1987-08-18 Cerutti Spa Off Mec Dispositivo di registrazione istantanea per un gruppo a racla, asservito ad un cilindro di una macchina da stampa
DE3907483A1 (de) * 1989-03-08 1990-09-13 Voith Gmbh J M Glaett- oder dosiereinrichtung
US5121689A (en) * 1991-03-27 1992-06-16 Rockwell International Corporation Ultrasonic ink metering for variable input control in keyless lithographic printing
US5226364A (en) * 1991-03-27 1993-07-13 Rockwell International Corporation Ultrasonic ink metering for variable input control in lithographic printing
DE4213662C2 (de) * 1992-04-25 1995-07-06 Koenig & Bauer Ag Verfahren zum Anstellen einer Kammerrakel für eine Rotationsdruckmaschine
SE470283B (sv) * 1992-05-22 1994-01-10 Aake Boeoese Kammarrakelanordning för tryckverk och tryckverk
JP2000085094A (ja) * 1998-09-16 2000-03-28 Toppan Printing Co Ltd 印刷機のドクタリング装置
US6203962B1 (en) * 1999-06-24 2001-03-20 Konica Corporation Electrophotographic image forming method, electrophotographic image forming apparatus, and processing cartridge and electrophotographic photoreceptor used therein
DE10044092A1 (de) * 1999-10-11 2001-04-26 Heidelberger Druckmasch Ag Rakeleinrichtung in einem Farbwerk einer Rotationsdruckmaschine
DE10052011A1 (de) * 2000-10-20 2002-04-25 Heidelberger Druckmasch Ag Farbwerk in einer Druckmaschine

Also Published As

Publication number Publication date
ES2272603T3 (es) 2007-05-01
US6752077B2 (en) 2004-06-22
JP2003334920A (ja) 2003-11-25
DE50208200D1 (de) 2006-11-02
EP1362696A1 (fr) 2003-11-19
US20030213386A1 (en) 2003-11-20

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