EP1342574B1 - Dispositif de filtrage pour le circuit de liquide de mouillage d'une machine d'impression offset - Google Patents

Dispositif de filtrage pour le circuit de liquide de mouillage d'une machine d'impression offset Download PDF

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Publication number
EP1342574B1
EP1342574B1 EP03003515A EP03003515A EP1342574B1 EP 1342574 B1 EP1342574 B1 EP 1342574B1 EP 03003515 A EP03003515 A EP 03003515A EP 03003515 A EP03003515 A EP 03003515A EP 1342574 B1 EP1342574 B1 EP 1342574B1
Authority
EP
European Patent Office
Prior art keywords
filter
band
filter device
drum
supporting
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
EP03003515A
Other languages
German (de)
English (en)
Other versions
EP1342574A2 (fr
EP1342574A3 (fr
Inventor
Hubert Peick
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.)
Technotrans SE
Original Assignee
Technotrans SE
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 Technotrans SE filed Critical Technotrans SE
Publication of EP1342574A2 publication Critical patent/EP1342574A2/fr
Publication of EP1342574A3 publication Critical patent/EP1342574A3/fr
Application granted granted Critical
Publication of EP1342574B1 publication Critical patent/EP1342574B1/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
    • B41F33/0054—Devices for controlling dampening
    • 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
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/31—Recovering used solvents or residues by filtering

Definitions

  • the invention relates to a filter device for the fountain solution circulation of an offset printing press.
  • Dampening agents are used in offset printing to moisten those parts of the surfaces of the printing plates where inking is to be prevented.
  • Moisturizers usually consist of water with a number of additives for adjusting the surface tension, the PH value, the corrosion behavior, etc. An important component is usually alcohol. Other additives are used to determine the pH value for controlling algae, fungi, bacteria, preventing corrosion, etc.
  • Fountain solutions of this type usually pass through a circuit with a dampening solution container, a supply line, a system for moistening the printing cylinder of the machine, a return for excess dampening solution and at least one filter device in the return region (such as in US-A-5,622,620 ).
  • the dampening solution is more or less freed of impurities, in particular of air dust, paper dust and ink particles. Because a thorough filtration of the dampening solution offers the opportunity to use it repeatedly in the circulation and thus to reduce the costs for the production of new dampening solution and the disposal of the spent dampening solution, partially multi-stage filter systems are used.
  • a known filter system shows and describes the DE 199 55 624 A1 ,
  • the EP 0 180 541 A1 describes a method and a system for cleaning a printing form, wherein a printing forme is cleaned with a high-pressure water jet.
  • the refluxing water is filtered in a filter unit, flows to a container and is sucked up again in a closed circuit.
  • the filter system comprises a stretched over two guide rollers endless screen which carries a disposable paper filter belt. One of the rollers is driven by a motor.
  • the filter belt is withdrawn from a supply roll, passes through a guide roller on the wire and falls at the other end into a container.
  • the invention is therefore an object of the invention to provide a filter device of the above type, which allows for relatively low maintenance and material costs, a permanent and effective cleaning of the dampening solution.
  • the filter device is a ring belt filter device comprising a filter belt which is advanceable according to the saturation with dirt particles, wherein the filter belt between a supply station and a collecting station is transportable, and Filter belt U-shaped herumgsPolt around the lower peripheral portion of a trommerlartigen, lying, rotatable arrangement.
  • the rotatable assembly is preferably formed of two end disks and a number of these coaxially connecting spacer rods.
  • the filter belt Due to its U-shaped arrangement, the filter belt forms a type of pan or trough into which the dampening solution can be introduced.
  • the filter band is surrounded at the bottom by a perforated support band, which has a firmer consistency than the filter band and this is supported with respect to the weight of the dampening solution to be filtered.
  • the support band is preferably an endless belt which can be transported around rollers in the lower and in the middle to upper region of the circular end discs.
  • rollers in the lower and in the middle to upper region of the circular end discs Preferably, two lower and two upper rollers are provided.
  • the support band is preferably formed as a link belt, possibly also as a perforated plastic band.
  • the ring band filter device according to the invention is particularly suitable as a pre-filter in conjunction with one or two further filters.
  • a dirt separation of 50 - 70% is sufficient to relieve the subsequent filter stages.
  • the use of a filter fleece from the roll is the most cost effective solution in terms of material consumption. With acceptable dimensions, depending on the pressure conditions, filter material can be stored on the feed roll for about 2-6 weeks, during which time largely automatic operation of the pre-filter is possible.
  • the single FIGURE is a schematic perspective view of a filter device according to the invention.
  • 10 denotes a cylinder group of a printing press
  • the lower roller dampening solution from a dip tank 12 receives and transmits to the other rollers.
  • Excess dampening solution runs from the immersion tank 12 via a line 14 in an intermediate container 16.
  • a valve 18 in the conduit 14 allows adjustment of the amount of fountain solution flowing through the conduit 14.
  • the filter device 24 has as a central component a rotatable, horizontal, perforated drum 26, around the lower portion of which a filter belt 28 is laid, which extends from a supply roll 30 to a collecting roll 32 and from the supply roll to the collecting roll stepwise or continuously corresponding to the entering contamination of the filter material can be advanced.
  • the line 20, which emanates from the intermediate container 16 enters the interior of the drum 26.
  • the pump 22 therefore pumps the dampening solution from the intermediate container 16 into the drum 26, and from there it penetrates through the perforated drum wall and the material of the filter belt 28 into a collecting container 34 located below the drum.
  • an endless support belt 36 is provided, which is wrapped around two respective lower rollers 38, 40 and two upper rollers 42, 44 right and left of the drum according to the drawing.
  • This endless support belt 36 is for example a link belt made of plastic or wire, but may also be a perforated plastic film or the like.
  • the support belt 36 may form the drive for the arrangement of drum and filter belt, but may also be taken by them.
  • the dampening solution penetrates through the perforated drum, the filter belt and the support band on its way into the collecting container 34.
  • a filter bag 54 as a further filter device for the dampening solution, which can form the next, finer filter stage. From the dampening solution tank 50, the dampening solution can be conveyed back into the immersion tank 12 via a valve 56, a line 58 and a pump 60.
  • the ring band filter device according to the invention is particularly suitable as a pre-filter stage for a 2- or even 3-stage filter system.
  • This pre-filter stage should be arranged as close as possible to the dirt entry in the printing unit. It allows automatic, gradual or continuous switching of the filter belt as a function of the saturation with dirt particles.
  • the increase of dampening solution within the drum can be used as a measure of the contamination of the filter belt, so that the switching of the filter belt can be controlled automatically.
  • a filter stage can then be mounted, for example, in the fountain solution tank, a filter bag at the end of the entering into the tank return pipe.
  • a fine filter stage in the form of a pressure filter element in the dampening solution bypass line can be provided as the third filter stage.

Landscapes

  • Rotary Presses (AREA)
  • Filtration Of Liquid (AREA)
  • Screen Printers (AREA)

Claims (9)

  1. Dispositif de filtrage pour le circuit de liquide de mouillage d'une machine d'impression offset, caractérisé en ce que le dispositif de filtrage est un dispositif de filtrage à bande annulaire qui comprend une bande filtrante (28) qui peut être amenée à avancer en fonction de la saturation en particules d'impuretés, la bande filtrante (28) pouvant être transportée entre une station de stockage (30) et une station de collecte (32), et la bande filtrante (28) est entourée en U autour de la zone circonférentielle inférieure d'un arrangement (26) rotatif, allongé, du type tonneau.
  2. Dispositif de filtrage selon la revendication 1, caractérisé en ce que l'arrangement (26) rotatif est formé de deux disques frontaux et d'un certain nombre de tiges d'espacement qui raccordent ces disques de façon coaxiale.
  3. Dispositif de filtrage selon la revendication 2, caractérisé en ce que la bande filtrante (28) est entourée par en-dessous d'une bande d'appui (36) perforée.
  4. Dispositif de filtrage selon la revendication 3, caractérisé en ce que la bande d'appui (36) est une bande sans fin qui peut être transportée autour de rouleaux (38, 40, 42, 44) à la hauteur de la zone inférieure ainsi que moyenne jusqu'à la zone supérieure de l'arrangement (26) de type tonneau.
  5. Dispositif de filtrage selon la revendication 4, caractérisé en ce que la bande d'appui (36) est enroulée autour de deux rouleaux inférieurs et de deux rouleaux supérieurs (38, 40 : 42, 44).
  6. Dispositif de filtrage selon une des revendications 3 à 5, caractérisé en ce que la bande d'appui (36) est une bande à maillons.
  7. Dispositif de filtrage selon une des revendications 3 à 6, caractérisé en ce que la bande d'appui (36) est guidée sur la circonférence des disques frontaux de l'arrangement (26) de type tonneau.
  8. Dispositif de filtrage selon une des revendications 3 à 7, caractérisé en ce que la bande d'appui (36) peut être entraînée en fonction de la consommation du matériau de bande filtrante.
  9. Dispositif de filtrage selon une des revendications 1 à 8, caractérisé en ce que le poste de stokage et le poste de collecte de la bande filtrante (28) sont un rouleau de stockage (30) et un tourniquet de réception (32).
EP03003515A 2002-03-05 2003-02-15 Dispositif de filtrage pour le circuit de liquide de mouillage d'une machine d'impression offset Expired - Lifetime EP1342574B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20203521U 2002-03-05
DE20203521U DE20203521U1 (de) 2002-03-05 2002-03-05 Filtereinrichtung für den Feuchtmittelkreislauf einer Offset-Druckmaschine

Publications (3)

Publication Number Publication Date
EP1342574A2 EP1342574A2 (fr) 2003-09-10
EP1342574A3 EP1342574A3 (fr) 2004-01-07
EP1342574B1 true EP1342574B1 (fr) 2010-10-06

Family

ID=7968611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003515A Expired - Lifetime EP1342574B1 (fr) 2002-03-05 2003-02-15 Dispositif de filtrage pour le circuit de liquide de mouillage d'une machine d'impression offset

Country Status (3)

Country Link
EP (1) EP1342574B1 (fr)
AT (1) ATE483585T1 (fr)
DE (2) DE20203521U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059086B1 (fr) 2015-02-23 2017-04-12 Kraft-Schlötels GmbH Système de filtration de presses

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0180541B1 (fr) * 1984-10-31 1989-11-02 H. Schneebeli & Co.AG Procédé et dispositif de nettoyage d'une forme d'impression
US5622620A (en) * 1994-07-08 1997-04-22 Pall Corporation Apparatus for treating fountain solution
DE19955624A1 (de) 1999-11-19 2001-05-23 Fogra Forschungsgesellschaft D Feuchtwasser-Versorgungseinrichtung für Offset-Druckmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059086B1 (fr) 2015-02-23 2017-04-12 Kraft-Schlötels GmbH Système de filtration de presses
EP3059086B2 (fr) † 2015-02-23 2021-01-27 Kraft-Schlötels GmbH Système de filtration de presses

Also Published As

Publication number Publication date
DE20203521U1 (de) 2002-05-29
DE50313145D1 (de) 2010-11-18
EP1342574A2 (fr) 2003-09-10
EP1342574A3 (fr) 2004-01-07
ATE483585T1 (de) 2010-10-15

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