EP0379069B1 - Procédé et dispositif de nettoyage de cylindres d'une machine d'impression rotative - Google Patents

Procédé et dispositif de nettoyage de cylindres d'une machine d'impression rotative Download PDF

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Publication number
EP0379069B1
EP0379069B1 EP90100530A EP90100530A EP0379069B1 EP 0379069 B1 EP0379069 B1 EP 0379069B1 EP 90100530 A EP90100530 A EP 90100530A EP 90100530 A EP90100530 A EP 90100530A EP 0379069 B1 EP0379069 B1 EP 0379069B1
Authority
EP
European Patent Office
Prior art keywords
web
cleaning
dryer
drier
printing material
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
EP90100530A
Other languages
German (de)
English (en)
Other versions
EP0379069A3 (en
EP0379069A2 (fr
Inventor
Franz Waizmann
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.)
Baldwin Gegenheimer GmbH
Original Assignee
Baldwin Gegenheimer GmbH
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
Priority claimed from DE19893901105 external-priority patent/DE3901105C1/de
Application filed by Baldwin Gegenheimer GmbH filed Critical Baldwin Gegenheimer GmbH
Publication of EP0379069A2 publication Critical patent/EP0379069A2/fr
Publication of EP0379069A3 publication Critical patent/EP0379069A3/de
Application granted granted Critical
Publication of EP0379069B1 publication Critical patent/EP0379069B1/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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator
    • 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 invention relates to a method and a device for cleaning a cylinder of a web printing machine, in particular a blanket cylinder, according to the preambles of the method and device claim.
  • the application of a substance to regulate the amount evaporated during the thermal step in the dryer offers one possibility.
  • the substance applied in accordance with the proposal can lead to malfunctions in the regulated, stationary process, the exhaust air purification system having irregularities and the signal processing in the dryer causing undesired adjustment steps.
  • the solution is essentially aimed at restricting the portions evaporating more and more from the web during the cleaning process on the basis of possible, approximately equivalent process engineering measures in addition to the material application. They consist of the features specified in the characterizing part of claim 1 and claim 2, respectively.
  • Both measures serve the continuous treatment of the printing material outside of the blanket cleaning and do not form a targeted, short-term effect on the operation of the thermal continuous dryer.
  • the advantage of the measure according to the invention is that it is inevitable over that during the cleaning process the blanket cylinder employed permanent web outgoing solvent quantities are partially reduced. As a result, the requirement of falling below the lower explosion limit of gas concentrations in the dryer can be met.
  • the printing web 1 runs from the roll into the printing units 2, in which the respective image colors are printed in register.
  • the inks of the heatset type are thickened in the dryer 3 to such an extent that after cooling while running over the cooling roller surfaces, they produce a surface which can be processed in the folder and is not smearable.
  • the dryer 3 has inflow connections and chimneys for the exhaust air to the exhaust air purification system.
  • the exhaust air enriched with solvent vapors flows in the direction of arrow 4.
  • Fig. 2 is shown against the blanket cylinder 5 for fine and the blanket cylinder 5 for back pressure wash bar 6.
  • the web processing runs from the last printing unit 2 shown, of which five printing units are arranged on average in succession according to the number of colors to be printed, to the dryer 3 with its drying sections lying one behind the other.
  • the dryer 3 has flaps 8 for web feed and ventilation.
  • An additional unit 7 is arranged in front of the dryer entrance, through which the web 1 leads. During normal operation during production, the additional unit 7 is open and accessible.
  • the coating device 9 is set against the running web 1.
  • the additional unit 7 moves from the open state to the denser, partially closed state.
  • a suction 14 extends from the additional unit 7 to the exhaust air flow 4.
  • the coating device 9 has a bar 10, over which the cloth 11 is pulled.
  • the coating device 9 has one or more rulers 12 placed on the paper web transversely to its transport direction. When two rulers 12 are set up, an intermediate space 15 which is again almost closed with respect to the space of the additional unit 7 is created, which permits improved suction, provided that the web 1 is exposed to the suction both from the top and from the bottom to avoid tearing forces.
  • the coating device 9 has a roller 13 for the partial wrapping of the top and bottom of the web 1. Fixed segments are expediently installed within the rollers 13, which result in a suction window 16 pointing to the web 1.
  • a sensor 17 of a gas measuring device is provided, with which the gas / vapor concentration of the flammable gases / vapors which essentially arise is tracked.
  • the gas measuring device delivers measured values of individual or several gas components. The introduction of cleaning agent remaining after removal in the additional unit 7 on the web 1 into the dryer 3 is thus checked.
  • a sensor 17 can also be arranged in the additional unit 7.
  • An active connection can be established between the gas measuring device and the adjustable members of the coating device 9 (cloth feed, suction quantity, etc.). A circuit for this is provided in the control part 18.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (6)

  1. Procédé de nettoyage de cylindres d'une presse d'impression rotative, comprenant un certain nombre de groupes d'impression (2), avec amenée commandée d'un liquide de nettoyage, dans lequel l'opération de nettoyage s'effectue pendant le défilement de la bande de matière à imprimer (1) qui emporte par endroits des restes d'encre ou de couleur, et le liquide de nettoyage s'écoule vers la bande à imprimer, laquelle passe, dans la suite de son trajet, à travers un séchoir thermique (3) à passage continu, caractérisé en ce que la bande de matière à imprimer (1) est essuyée en amont du séchoir (3), au dispositif d'essuyage (9) étant pour cela mis en contact avec la bande de matière à imprimer (1), au moins pendant la période de lavage du blanchet.
  2. Procédé selon la revendication 1, caractérisé en ce que les quantités partielles du liquide de nettoyage laissées sur la bande sont évacuées, par une matière relativement plus sèche, par exemple, un tissu pouvant être déroulé, ou par une aspiration d'air qui aboutit dans une cheminée d'air usé.
  3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, caractérisé en ce qu'en amont du séchoir (3) est disposé un groupe supplémentaire (7), dans lequel se trouve un dispositif d'essuyage (9) qui peut être appliqué contre la bande (1).
  4. Dispositif selon la revendication 3, caractérisé en ce qu'une aspiration menant à la cheminée d'air usé du séchoir (3), partant du groupe supplémentaire (7).
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le dispositif d'essuyage (9) est formé par une barre (10) munie d'un tissu (11) tiré sur cette barre ou par plusieurs réglettes (12) qui s'étendent transversalement à la direction de transport de la bande (1), ou par des cylindres (13) munis de fenêtres d'aspiration, qui sont embrassés à peu près en S.
  6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce qu'il est prévu un dispositif de mesure des gaz muni d'un capteur (17) pour le contrôle des éléments évacués avec le dispositif d'essuyage (9) et des parties du liquide de nettoyage qui est vaporisé et qui parvient encore dans le séchoir (3), et en ce que le capteur (17) transmet des résultats de mesure à un élément de commande (18).
EP90100530A 1989-01-16 1990-01-11 Procédé et dispositif de nettoyage de cylindres d'une machine d'impression rotative Expired - Lifetime EP0379069B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901105 1989-01-16
DE19893901105 DE3901105C1 (en) 1987-07-15 1989-01-16 Method and apparatus for cleaning cylinders of a web-fed printing machine

Publications (3)

Publication Number Publication Date
EP0379069A2 EP0379069A2 (fr) 1990-07-25
EP0379069A3 EP0379069A3 (en) 1990-10-17
EP0379069B1 true EP0379069B1 (fr) 1993-07-28

Family

ID=6372174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100530A Expired - Lifetime EP0379069B1 (fr) 1989-01-16 1990-01-11 Procédé et dispositif de nettoyage de cylindres d'une machine d'impression rotative

Country Status (5)

Country Link
EP (1) EP0379069B1 (fr)
AT (1) ATE91971T1 (fr)
DE (1) DE59002044D1 (fr)
DK (1) DK0379069T3 (fr)
ES (1) ES2042076T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1460514B2 (de) * 1965-07-26 1977-03-24 Vepa Ag, Riehen Bei Basel (Schweiz) Verfahren und vorrichtung zum waermebehandeln von bahnigem gut, insbesondere textilgut
SE394962B (sv) * 1976-09-10 1977-07-25 Sca Development Ab Anordning for paforandet av vetskor innehallande lost eller dispergerat material pa kontinuerliga pappersbanor
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DE8707384U1 (de) * 1987-05-22 1987-07-16 Baldwin-Gegenheimer GmbH, 8900 Augsburg Vorrichtung zur Bearbeitung von lösungsmittelhaltigem Material

Also Published As

Publication number Publication date
EP0379069A3 (en) 1990-10-17
ATE91971T1 (de) 1993-08-15
DK0379069T3 (da) 1993-12-20
ES2042076T3 (es) 1993-12-01
EP0379069A2 (fr) 1990-07-25
DE59002044D1 (de) 1993-09-02

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