EP0816078B1 - Procédé et dispositif pour nettoyer des rouleaux de guidage dans une machine à imprimer - Google Patents

Procédé et dispositif pour nettoyer des rouleaux de guidage dans une machine à imprimer Download PDF

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Publication number
EP0816078B1
EP0816078B1 EP19970202028 EP97202028A EP0816078B1 EP 0816078 B1 EP0816078 B1 EP 0816078B1 EP 19970202028 EP19970202028 EP 19970202028 EP 97202028 A EP97202028 A EP 97202028A EP 0816078 B1 EP0816078 B1 EP 0816078B1
Authority
EP
European Patent Office
Prior art keywords
roller
web
rollers
printing press
length
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
EP19970202028
Other languages
German (de)
English (en)
Other versions
EP0816078A2 (fr
EP0816078A3 (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 EP0816078A2 publication Critical patent/EP0816078A2/fr
Publication of EP0816078A3 publication Critical patent/EP0816078A3/fr
Application granted granted Critical
Publication of EP0816078B1 publication Critical patent/EP0816078B1/fr
Anticipated expiration legal-status Critical
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices

Definitions

  • the present invention relates to a method and device for cleaning guide rollers in a printing press, a paper web being lead over these rollers in continuous motion.
  • the web is provided with a length of washing solution or cleaning liquid, and the length is transferred to each roller, which is braked pulswise, when an appropriate part of said length passes over it
  • a printing press is often provided with a large number of guide rollers, over which the web is lead to further processes after printing.
  • the total number of such rollers is often many times greater than the number used in a certain application.
  • rollers used will after a certain running time cause set-off problems by being dirtied with printing ink residues, paper fibres and so forth and need to be cleaned.
  • the web can be removed from the printing press and the used rollers be manually cleaned with a washing solution or cleaning liquid. It goes without saying that such a manual cleaning is laborious and splashy, and after the cleaning the web has again to be lead through the press manually.
  • EP-A-423 093 (from the same applicant as in the present case), DE-C-3 900 657, and US-A-4 781 116 are examples of the prior art as defined in the introductory paragraph above.
  • a more convenient method of cleaning the utilized guide rollers is according to the invention attained in that the position - in the form x/y coordinates in a printing press related coordinate system - of each roller to be cleaned, the diameter of the roller, and the speed of the web are supplied to a computer for determining an appropriate roller braking sequence.
  • This sequence may involve more than said maximum number of rollers, but for avoiding web break they are not allowed to be braked concurrently.
  • the x/y coordinates and the diameter of each roller in the press can be pre-entered in the computer together with a corresponding ordinal number. For a certain set-up only the ordinal numbers for the rollers used need to be entered in the computer in the order they are engaged by the web.
  • the length of washing solution on the web is preferably applied by means of an applicator remote from the rollers in the printing press.
  • the above defined process means that washing solution in a certain length is applied on the web and transported to each roller to be cleaned.
  • the rotating roller will be provided with washing solution from the web.
  • the cleaning effect is greatly enhanced by pulsewise braking of the roller, so that it will be rubbed and cleaned. If desired for improving the cleaning and drying of the roller, pulsewise braking of the roller may also occur, when a dry part of the web has reached the roller.
  • a printing press has a number of printing units 1, each having an ink train, a dampener arrangement, a plate cylinder and a blanket cylinder in the case of an offset press. (It has to be noted, however, that the invention is applicable to different types of printing presses.)
  • a paper web 2 passes the blanket cylinder in the printing unit 1, where it is printed.
  • the web After having been printed, the web continues over a certain number of rollers or guide rollers 3 out of a much greater number of such rollers totally provided in the press.
  • the chosen path for the web depends on the further processing in the press, which may vary widely.
  • This brake 4 may for example be electrically controlled, pneumatically operated and mechanically applied. Other designs are possible.
  • an applicator 5 for washing solution or cleaning liquid is arranged at the web 2, preferably before or downstream of the printing unit 1, an applicator 5 for washing solution or cleaning liquid is arranged.
  • This applicator is further described in applicant's copending Swedish Patent Application No 9504660-3, and no description is accordingly given here.
  • a washing solution may be tranferred from the applicator 5 to the web 2.
  • the roller is withdrawn from contact with the web 2.
  • the device is provided with a computerized control system, whereby a cleaning sequence as described below may be obtained.
  • the positions of the respective rollers 3 used in a particular set-up are supplied to the computer in the form of x/y coordinates with a suitable origo in the printing press, for example in the applicator 5. Also positions of rollers and/or bars over which the web is lead but which are not to be cleaned have to be put into the computer. Further data put into the computer are the speed of the web 2 and the diameter of each roller 3 passed by the web 2. The winding angle of the web 2 around each roller 3 is computed by the computer.
  • control system may operate the arrangement in the following way for cleaning each roller 3 used in a particular set-up from paper fibres, printing ink residues and the like:
  • the web 2 moves with a given speed through the arrangement.
  • the applicator 5 provides the web with a length of washing solution which is either fixed or appropriate with regard to the number of rollers to be cleaned. Based on the input data and the fact that only a limited number of rollers may be braked at a time for avoiding an otherwise occurring web break, the computer determines a certain brake sequence for the roller brakes, so that an optimal cleaning result is obtained. When an appropriate part of the washing solution length reaches a rotating roller 3, washing solution is transferred to the roller. In order to greatly improve the cleaning of the roller by a rubbing effect, the roller is then braked pulswise by its brake 4.
  • the washing solution can then together with the dirt be removed by a subsequent dry part of the web 2.
  • the cleaning and drying effect may be improved by pulsewise braking of the roller also at this stage, but the main cleaning effect is obtained in the first stage with the washing solution.

Landscapes

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

Claims (8)

  1. Procédé pour nettoyer des rouleaux (3) de guidage dans une presse à imprimer, dans lequel
    une bande (2) qui est guidée, selon un mouvement continu, sur ces rouleaux est pourvue, à un emplacement à l'écart des rouleaux, d'une longueur de solution de lavage ou de liquide de nettoyage,
    la longueur est transférée vers chaque rouleau, et
    chaque rouleau est freiné de manière impulsionnelle lorsqu'une partie appropriée de ladite longueur passe sur celui-ci,
       caractérisé en ce que la position - sous la forme de coordonnées x/y dans un système de coordonnées se rapportant à une presse à imprimer - de chaque rouleau (3) à nettoyer, le diamètre du rouleau et la vitesse de la bande (2) sont délivrés à un calculateur dans le but de déterminer une séquence de freinage de rouleau appropriée.
  2. Procédé selon la revendication 1, caractérisé en ce que le nombre maximal de rouleaux (3) freinés de manière concurrente est déterminé pour éviter une rupture de bande due à une tension de bande accrue.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que, initialement, les coordonnées x/y et le diamètre de chaque rouleau (3) de la presse sont entrés dans le calculateur conjointement avec un nombre ordinal correspondant, et en ce que seuls les nombres ordinaux des rouleaux utilisés dans une certaine configuration sont entrés dans le calculateur afin qu'ils soient engagés par la bande (2).
  4. Procédé selon la revendication 1, caractérisé en ce que la longueur de solution de lavage, située sur la bande (2), est appliquée au moyen d'un applicateur (5) situé à l'écart des rouleaux (3) dans la presse à imprimer.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau (3) à nettoyer est freiné au moyen d'un frein (4).
  6. Dispositif pour nettoyer des rouleaux (3) de guidage dans une presse à imprimer, une bande (2) étant guidée sur ces rouleaux, comprenant
    un moyen (5) d'application situé à l'écart des rouleaux (3) à nettoyer, destiné à appliquer une longueur de solution de lavage, ou de liquide de nettoyage, à la bande (2) qui est en mouvement continu, et
    un frein (4) de rouleau à appliquer de manière impulsionnelle lorsqu'une partie appropriée de la longueur de solution de lavage passe sur le rouleau respectif,
       caractérisé par
       un calculateur destiné à déterminer une séquence de freinage de rouleau appropriée au vu de données entrées concernant la position - sous la forme de coordonnées x/y dans un système de coordonnées se rapportant à une presse à imprimer - de chaque rouleau (3) à nettoyer, le diamètre du rouleau et la vitesse de la bande (2).
  7. Dispositif selon la revendication 6, caractérisé en ce que le moyen d'application sous la forme d'un applicateur (5) comporte un rouleau applicateur amené en contact avec la bande (2) lorsque la solution de lavage doit être appliquée à la bande.
  8. Dispositif selon la revendication 7, caractérisé en ce que le frein (4) de rouleau est commandé électriquement, mis en oeuvre pneumatiquement et appliqué mécaniquement.
EP19970202028 1996-07-05 1997-07-02 Procédé et dispositif pour nettoyer des rouleaux de guidage dans une machine à imprimer Expired - Lifetime EP0816078B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602655A SE508055C2 (sv) 1996-07-05 1996-07-05 Sätt och anordning för rengöring av styrrullar i en tryckpress
SE9602655 1996-07-05

Publications (3)

Publication Number Publication Date
EP0816078A2 EP0816078A2 (fr) 1998-01-07
EP0816078A3 EP0816078A3 (fr) 1998-06-24
EP0816078B1 true EP0816078B1 (fr) 2001-10-24

Family

ID=20403284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970202028 Expired - Lifetime EP0816078B1 (fr) 1996-07-05 1997-07-02 Procédé et dispositif pour nettoyer des rouleaux de guidage dans une machine à imprimer

Country Status (4)

Country Link
EP (1) EP0816078B1 (fr)
JP (1) JPH1067100A (fr)
DE (1) DE69707570T2 (fr)
SE (1) SE508055C2 (fr)

Family Cites Families (6)

* 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
US4930415A (en) * 1988-02-10 1990-06-05 Baldwin-Japan Limited Automatic web guide roller cleaning device
DE3900657C1 (en) * 1989-01-11 1990-06-13 Rolf 7403 Ammerbuch De Georg Method and apparatus for influencing the web run when cleaning blanket cylinders of a web-fed rotary offset printing machine
SE8903330L (sv) * 1989-10-10 1991-04-11 Birger Hansson Foerfarande och anordning foer rengoering av brytrullar
DE4434052A1 (de) * 1994-09-23 1996-03-28 Bvs Gmbh Waschanlagensteuerung
SE508271C2 (sv) * 1995-12-27 1998-09-21 Jimek Ab Sätt och anordning vid en applikator

Also Published As

Publication number Publication date
SE508055C2 (sv) 1998-08-17
JPH1067100A (ja) 1998-03-10
EP0816078A2 (fr) 1998-01-07
EP0816078A3 (fr) 1998-06-24
SE9602655L (sv) 1998-01-06
SE9602655D0 (sv) 1996-07-05
DE69707570D1 (de) 2001-11-29
DE69707570T2 (de) 2002-06-27

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