EP0816080B1 - Procédé pour nettoyer un cylindre porte-blanchet dans une machine à imprimer - Google Patents

Procédé pour nettoyer un cylindre porte-blanchet dans une machine à imprimer Download PDF

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Publication number
EP0816080B1
EP0816080B1 EP19970202029 EP97202029A EP0816080B1 EP 0816080 B1 EP0816080 B1 EP 0816080B1 EP 19970202029 EP19970202029 EP 19970202029 EP 97202029 A EP97202029 A EP 97202029A EP 0816080 B1 EP0816080 B1 EP 0816080B1
Authority
EP
European Patent Office
Prior art keywords
printing
blanket cylinder
cleaning
cylinder
web
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
EP19970202029
Other languages
German (de)
English (en)
Other versions
EP0816080A3 (fr
EP0816080A2 (fr
Inventor
Birger Hansson
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.)
Jimek AB
Original Assignee
Jimek AB
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 Jimek AB filed Critical Jimek AB
Publication of EP0816080A2 publication Critical patent/EP0816080A2/fr
Publication of EP0816080A3 publication Critical patent/EP0816080A3/fr
Application granted granted Critical
Publication of EP0816080B1 publication Critical patent/EP0816080B1/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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders

Definitions

  • the present invention relates to a method for cleaning a blanket on a rotatable blanket cylinder in a printing press from printing ink, paper fibres, lint, and the like.
  • cleaning may at least be necessary at each new printing batch in the press.
  • the cleaning is manually performed by means of a solvent for the ink, possibly supplemented with a water-based medium for removing fibres and the like.
  • the cleaning cannot normally be performed until the paper web has been cut and removed. After the cleaning the web must be re-threaded through the printing press, which is tedious and time-consuming. All-in-all the manual cleaning process is dirty, costly and time-consuming.
  • a far better method performed without manual labour and without any need to remove the paper web is according to the invention characterized in that - after the supply of printing ink in the press has been disrupted - the moving paper web prior to contacting the blanket cylinder is supplied with a cleaning liquid in the form of a solvent for the ink used in the printing press and in that the plate cylinder in contact with the blanket cylinder is supplied with fountain solution, normally used at printing in the press.
  • the supply sequence is such that the web is supplied with cleaning liquid at its passage of the blanket cylinder before it is supplied with fountain solution via the plate cylinder and the blanket cylinder, so that the web strength is not deteriorated by the water-based fountain solution.
  • the cleaning is performed without any manual steps and without any need for web disruption. Rather, the web is essential for the cleaning, in that the cleaning liquid is supplied via the web (and is supplemented in the cleaning process by the fountain solution, normally used at printing) and in that the dirt is carried away by the web. Practical tests have shown that a very good cleaning result may be achieved in a relatively short time with a low loss of paper web.
  • EP-A-618 074 and US-A-4 781 116 disclose a method according to the preamble of claim 1.
  • a paper web 1 to be printed is transferred in a direction indicated by means of an arrow, i e upwards in the drawing, through a nip 2 between a rotatable blanket cylinder 3 and a further cylinder 4, both having the same peripheral speed as the speed of the web 1.
  • the right cylinder 4 may be a compression cylinder or a second blanket cylinder belonging to a printing unit not to be further described, whereas the printing unit to which the left blanket cylinder 3 belongs will be described.
  • Other printing units in the printing press may have the same general design as the one shown and described or may have another design.
  • a rotatable plate cylinder 5 In contact with the blanket cylinder 3 is a rotatable plate cylinder 5. Printing ink is transferred to the plate cylinder 5 from an ink source 6 through an ink train 7, which does not form part of the invention and therefore is not described in further detail. However, the two end rollers 8 of the ink train 7 are specifically mentioned for a reason set out below.
  • a water-based fountain solution for the non-printing areas has to be transferred to the plate cylinder 5 from a spray dampener arrangement, normally a spray bar 9 via rollers 10, 11 and 11'.
  • the printing press described so far belongs to the state of the art.
  • the blanket on the blanket cylinder 3 is soiled by ink, paper fibres, and lint, which in simplified terms may be said to be the addition of ink and paper fibres, and has to be cleaned at occasions.
  • the invention resides in a new method for blanket cleaning.
  • an applicator 12 is added to the printing press in the vicinity of the web 1 downstream of the nip 2.
  • This applicator 12 is further described in applicant's copending Swedish Patent Application No 9504660-3 and has a roller 13, which is in contact with a cleaning liquid in the applicator and which may be brought into contact with the web 1, when cleaning is to be performed.
  • the applicator 12, when not operational, is closed by a cover 14 preventing undesired matter from entering the applicator.
  • the cleaning liquid in the applicator 12 is a solvent for the ink used in the printing press, normally an oil.
  • the press speed is decreased from the printing speed, and the supply of ink to the plate cylinder 5 is disrupted in that the two ink train rollers 8 are brought out of contact with the plate cylinder 5. Then the applicator roller 13, which preferably is motor driven, is brought into contact with the web 1.
  • the spray bar 9 may start to operate and spray its water based-fountain solution, normally in greater quantities than during printing, on the roller 10 for further transfer to the plate cylinder 5 and the blanket cylinder 3.
  • the reason for this sequence is that the paper web 1 may burst, if it is exposed to the water based fountain solution prior to the cleaning liquid, which may be oil-based.
  • the cleaning liquid from the applicator 12 and the fountain solution from the spray bar 9 especially the blanket cylinder 3 but also the plate cylinder 5 will be cleaned from ink, paper fibres, and lint, and the dirt will be removed by the paper web 1, which is continuously moving through the nip 2 during the cleaning process.
  • the cleaning process may be intermittently or continouosly performed. Practical tests have shown that a cleaning performed as described during a short period of time results in a satisfactory cleaning. The scrap web length obtained is moderate. Further, there is no need to cut and re-thread the paper web before and after the cleaning process, respectively.
  • the spray dampener arrangement is automatically turned-off on the printing area not used, for example 1/4, 3/4 or 1/2 web. This is done at the set-up for production by the printing personnel. This work is always done, which means that no additional set-up work is needed for this cleaning method.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (3)

  1. Procédé de nettoyage d'un blanchet sur un cylindre porte-blanchet rotatif (3) dans une presse d'imprimerie pour imprimer une encre, des fibres de papier, de la ouate et analogue, caractérisé en ce que - après que l'alimentation en encre d'impression dans la presse a été interrompue - une bande de papier (1) en mouvement, avant d'entrer en contact avec le cylindre porte-blanchet (3), reçoit un liquide de nettoyage sous la forme d'un solvant pour l'encre utilisée dans la presse d'imprimerie et en ce qu'un cylindre porte-plaque rotatif (5) en contact avec le cylindre porte-blanchet reçoit une solution de mouillage normalement utilisée lors d'une impression dans la presse.
  2. Procédé selon la revendication 1, caractérisé en ce que la séquence d'alimentation est telle que la bande (1) est alimentée en liquide de nettoyage à son passage du cylindre porte-blanchet (3) avant d'être alimentée en solution de mouillage par l'intermédiaire du cylindre porte-plaque (5) et du cylindre porte-blanchet.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un resserrement (2) est formé entre le cylindre porte-blanchet (3) et un autre cylindre (4), qui est un cylindre porte-blanchet d'une unité d'impression voisine ou un cylindre de compression, et en ce que la bande (1) est transférée à travers ce resserrement.
EP19970202029 1996-07-03 1997-07-02 Procédé pour nettoyer un cylindre porte-blanchet dans une machine à imprimer Expired - Lifetime EP0816080B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602626 1996-07-03
SE9602626A SE508143C2 (sv) 1996-07-03 1996-07-03 Sätt och anordning för rengöring av en tryckduk på en dukcylinder i en tryckpress

Publications (3)

Publication Number Publication Date
EP0816080A2 EP0816080A2 (fr) 1998-01-07
EP0816080A3 EP0816080A3 (fr) 1998-06-24
EP0816080B1 true EP0816080B1 (fr) 2002-05-15

Family

ID=20403259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970202029 Expired - Lifetime EP0816080B1 (fr) 1996-07-03 1997-07-02 Procédé pour nettoyer un cylindre porte-blanchet dans une machine à imprimer

Country Status (3)

Country Link
EP (1) EP0816080B1 (fr)
DE (1) DE69712571T2 (fr)
SE (1) SE508143C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0401185L (sv) * 2004-05-07 2005-11-08 Baldwin Jimek Ab Ett system för att rengöra en dukcylinder och en metod för att rengöra en dukcylinder
ITBO20070005A1 (it) * 2007-01-05 2008-07-06 Finelettra Internat S A "apparato per la pulitura dei cilindri nelle macchine da stampa di tipo continuo"
ITBO20070004A1 (it) * 2007-01-05 2008-07-06 Finelettra Internat S A "metodo ed apparato di tipo combinato per la pulitura dei cilindri nelle macchine da stampa di tipo continuo"
ITBO20070006A1 (it) * 2007-01-05 2008-07-06 Finelettra Internat S A Apparato per la spruzzatura di quantita variab ili di un liquido di pulitura su una o su entrambe le facce di un nastro di carta che avanza nelle macchine da stampa di tipo continuo e metodo per l'impiego di un tale apparato
FR2926487B1 (fr) * 2008-01-17 2011-05-06 Goss Int Montataire Sa Procede de lavage d'un groupe d'impression dans une presse rotative
ITBO20130331A1 (it) * 2013-06-26 2014-12-27 Elettra Srl Procedimento ed apparato di tipo combinato e semplificato per la pulitura dei cilindri nelle macchine da stampa di tipo continuo

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU579278B2 (en) * 1986-04-28 1988-11-17 Nikka Kabushiki Kaisha Washing method and apparatus for guide rollers of rotary press
DE3908536A1 (de) * 1989-03-16 1990-09-20 Alfred Conrad Verfahren zum reinigen der gummituchzylinder von rollenoffset-druckmaschinen
SE8903330L (sv) * 1989-10-10 1991-04-11 Birger Hansson Foerfarande och anordning foer rengoering av brytrullar
DE4301410A1 (de) * 1993-01-20 1994-07-21 Baldwin Gegenheimer Gmbh Druckmaschinen-Reinigungsvorrichtung
DE4401275C2 (de) * 1994-01-18 1999-05-12 Roland Man Druckmasch Einrichtung zum Reinigen der Übertragungszylinder

Also Published As

Publication number Publication date
DE69712571T2 (de) 2002-10-24
DE69712571D1 (de) 2002-06-20
SE9602626L (sv) 1998-01-04
SE9602626D0 (sv) 1996-07-03
EP0816080A3 (fr) 1998-06-24
SE508143C2 (sv) 1998-09-07
EP0816080A2 (fr) 1998-01-07

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