EP0210671A2 - Dispositif de mouillage pour machine à imprimer - Google Patents

Dispositif de mouillage pour machine à imprimer Download PDF

Info

Publication number
EP0210671A2
EP0210671A2 EP86200820A EP86200820A EP0210671A2 EP 0210671 A2 EP0210671 A2 EP 0210671A2 EP 86200820 A EP86200820 A EP 86200820A EP 86200820 A EP86200820 A EP 86200820A EP 0210671 A2 EP0210671 A2 EP 0210671A2
Authority
EP
European Patent Office
Prior art keywords
roller
dampening
rollers
solution flow
dampening solution
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.)
Granted
Application number
EP86200820A
Other languages
German (de)
English (en)
Other versions
EP0210671B1 (fr
EP0210671A3 (en
Inventor
Heinrich Dipl.-Ing. Zimmer
Fritz Dipl.-Ing. May
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.)
Maschinenfabrik Goebel GmbH
Original Assignee
Maschinenfabrik Goebel 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
Application filed by Maschinenfabrik Goebel GmbH filed Critical Maschinenfabrik Goebel GmbH
Publication of EP0210671A2 publication Critical patent/EP0210671A2/fr
Publication of EP0210671A3 publication Critical patent/EP0210671A3/de
Application granted granted Critical
Publication of EP0210671B1 publication Critical patent/EP0210671B1/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
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/30—Damping devices using spraying elements

Definitions

  • the proposed device relates to a dampening unit, in particular for offset printing presses, which contains at least one rotatable plate spraying the dampening solution and a roller immediately downstream of the plate in the running direction of the dampening solution.
  • a dampening unit of this type was known for example from DE-AS 24 39 999.
  • dampening systems are used on rotary printing presses, in particular on rotary offset printing presses, in order to thus apply moisture to a printing form at those points at which this printing form is not intended to give off ink to a printing material.
  • the device according to DE-AS 24 39 999 contains at least one, for example four rotatable plates, of which dampening solution is dispensed onto a roller of the rest of the dampening unit. This roller then ultimately transfers the dampening solution to the printing form in order to provide this printing form with dampening solution at those points at which this printing form is not to be provided with ink.
  • screens are provided to meter the application of the dampening solution onto the first roller in the direction of the dampening solution flow. This is intended to make the dampening solution application more uniform, which is necessary since the printing form is ultimately intended to be provided with a film of dampening solution which is as homogeneous as possible at the non-printing points.
  • roller or film dampening units have already been proposed, as can be seen, for example, from CH-PS 428 783.
  • film dampening systems of this type require a relatively large number of rollers in order to apply the dampening solution to the printing form in sufficiently uniform doses.
  • a further dampening unit is known from EP-A 0 141 217, which can contain several rollers with an elastic surface.
  • the dampening roller of this dampening unit is not also an ink roller.
  • it is therefore time-consuming to find a suitable balance between printing ink and dampening solution. It is therefore the task of improving a dampening unit, which contains at least one centrifugal plate for applying the dampening solution to the first roller of the dampening unit, so that a balance of printing ink and dampening solution suitable for printing can be achieved in a short time with relatively little effort the printing form can be transferred if at least one of the two components has been changed at short notice.
  • the dampening unit has at least three further rollers, that is to say a total of minimal contains four rollers, one of which is also an inking roller, that the second roller in the direction of the fountain solution flow has an elastic surface, a slip between the first and second rollers in the direction of the fountain solution flow is provided such that the first roller in the direction of the fountain solution flow clearly has a lower peripheral speed than the second roller and that all rollers of the dampening unit, with the exception of the applicator roller, are connected to one another by tooth engagement.
  • the first roller in the direction of the dampening solution flow can be adjusted to the second roller and the first and second rollers can be adjusted jointly to the third roller.
  • This third roller can be a friction roller and have a surface made of polyamide or the like.
  • at least one of the rollers can be separated or parked in relation to another roller in addition to the setting options just mentioned.
  • the invention makes it possible to combine the advantages of plate dampening systems on the one hand and roller dampening systems on the other hand, in order to propose a dampening unit with a relatively simple structure, which is capable, on the one hand, of a uniformly metered film of dampening solution to get onto the printing form, on the other hand allows a zone-wise change in the thickness of the dampening solution film with several rotors.
  • the figure shows a cross section through the rollers of the dampening unit and the application device for the dampening solution containing the rotatable centrifugal plate.
  • a forme cylinder 2 is rotatably mounted in a known manner.
  • This forme cylinder is also driven in a known manner.
  • At least one printing form is also attached to the circumference of the forme cylinder in a known manner.
  • This printing form prints the print motif on it with the interposition of a transfer cylinder or blanket cylinder on a printing material, in particular on an endless web, which in many cases consists of paper or plastic.
  • the printing form is designed in a known manner in such a way that it can accept ink at some desired locations and can transport it further onto the printing substrate and that it is unable to absorb ink at the other locations.
  • the printing form is using rollers 3, 4, 5 u. 6 inked, the roller 3 in a known manner is fed in the direction of arrow 7.
  • the roller 6 is not only part of the inking unit with the inking rollers 3, 4 and 5, but also part of a dampening unit, which consists of the rollers 8, 9, 10 in the direction of the fountain solution flow.
  • the roller 9 of the dampening unit is rotatably mounted in a swivel arm 11.
  • This pivot arm 11 can be pivoted with respect to the frame 1 about the pivot point 14 with the aid of an adjusting screw 12 and a stop 13 fastened to the frame 1.
  • a compression spring 15 tries to push the arm 16 of the swivel arm 11 in the figure in the clockwise direction away from the stop 13 attached to the machine frame 1.
  • a flap 18 is pivotally attached to the stop 13, the position of the flap 18 is adjusted with the aid of a screw 19 with a hand lever 20.
  • the adjusting screw 12 is attached in a threaded bore 21 of the arm 16, the adjusting screw 12 is attached. In this way, the position of the arm 16 can be determined with the help of the hand lever 20, the screw 19, the flap 18 and the respective position of the adjusting screw 12. This in turn, the size of the gap between the dampening rollers 9 u. 10 or in other words the pressure between the rollers 9 u. 10 set.
  • an eccentric 22 is rotatably mounted, which if necessary with the help of a gear 23, a corresponding worm wheel 24 and an adjustment screw 25 can be rotated.
  • a pivot lever 26 is rotatably mounted on this eccentric 22.
  • the pivot lever 26 can be pivoted via the joint 27 and a pressure medium cylinder 28.
  • the pivot lever 26 has an adjusting arm 29, into which an adjusting screw 30 is screwed.
  • the adjusting screw 30 contains an adjusting pin 31 which can be displaced by turning the adjusting screw.
  • the adjusting pin 31 of the adjusting screw 30 can rest against a stop 32 which is firmly connected to the pivot lever 11.
  • the adjusting pin 31 of the adjusting screw 12 can come to rest against the stop 13.
  • the gap between the first two rollers 8 u in the direction of the flow of the dampening solution. 9 of the dampening unit or the pressure to which the two rollers are exposed to one another can be set.
  • a dampening solution box 33 is also attached to the frame 1.
  • This dampening solution box is provided in a known manner with at least one spin plate 34.
  • several of these centrifugal plates can be arranged one behind the other, that is to say distributed over the working width of the machine.
  • the dampening solution to be fed to the printing form is ultimately brought onto the centrifugal plate in a known manner and, when the centrifugal plate rotates, is sprayed in a known manner in such a way that a spray cone 35 is formed.
  • This spray cone 35 is on the in Rich direction of the dampening solution flow is directed to the first dampening roller 8, so that the dampening solution flies from the spin plate 34 onto the dampening roller 8. From there, the dampening solution passes through the roller 9, the roller 10 and the applicator roller 6 onto the printing form attached to the forme cylinder 2.
  • the forme cylinder 2 is provided with a concentric gear 36.
  • the gear 36 meshes with a gear 37, which is concentrically connected to another gear 38.
  • the gear 38 also meshes with a gear 39 and with the concentric to the dampening roller 10 and together with it rotating gear 40th
  • the gear 40 is in engagement with a gear 41 which is fixedly connected to the dampening roller 9 and rotates with the latter. With the dampening roller 9 another gear 42 is fixedly connected and rotates like the gear 41 with the dampening roller 9.
  • the gear 42 is in engagement with a gear 43 which is fixedly connected to the dampening roller 8 and rotates together with it.
  • the effective diameter of the gear 43 is substantially larger than the outer diameter of the dampening roller 8, whereas the effective diameter of the gear 42 is significantly smaller than the diameter of the dampening roller 9.
  • the dampening roller 10 is connected to a so-called traversing drive, i. H. during its operation, it not only rotates around its own axis, which is mounted in a fixed position in the frame, but is axially moved back and forth along this axis, that is to say along the line of sight of the attached figure, during its rotation. This makes it possible to further even out the dampening solution applied to the circumference of the dampening roller 10 with the aid of the plate 34, the dampening roller 8 and the dampening roller 9, so that a uniform film of dampening solution is applied to the inking roller 6 and thus also to the forme cylinder 2 can be passed.
  • the dampening roller 8 represents the first roller, the roller 9 the second, roller 10 the third and roller 6 the fourth roller of the dampening unit in the direction of the dampening solution flow.
  • the surface of the dampening roller 8 consists of a hard water-friendly material, such as for example a metal, especially chrome.
  • the surface of the dampening roller 9 is elastic and consists, for example, of a rubber with a Shore-A hardness of 30.
  • the surface of the dampening roller 10 consists of a medium-hard, color-friendly plastic, such as a polyamide, which has become known under the trade name "Rilsan".
  • the surface of the application roller 6 is made of a soft material, such as rubber with a Shore-A hardness of 30.
  • the flap 18 can be loosened so that the arm 16 and thus the pivot lever 11 can be moved to the right in the figure with the aid of the compression spring 15. So that the dampening rollers 9 and 10 are separated from each other so that no dampening solution can get from the roller 9 to the roller 10. In addition, it is achieved in this way that the rollers 9 and 10, or their surfaces, which are made of elastic material, are not pressed against one another unnecessarily long and possibly deformed during longer breaks in operation. In addition, this separation has the advantage that the dampening unit can be switched on immediately before the start of printing work, without dampening immediately.
  • rollers 8 and 9 can be pre-moistened with the aid of the centrifugal plate or centrifugal plates 34 before the dampening solution can reach the rollers 10 and 6 and thus the printing form.
  • ink before the start of printing after switching on the printing machine, in particular after switching on the inking unit, ink can first reach the inking rollers 3, 4, 5, 6 and the roller 10 of the dampening unit in the direction of arrow 7.
  • no ink can get onto the rollers 8 and 9 at first, but rather they are completely coated with dampening solution.
  • rollers 8 and 9 would be separated from one another with the aid of the eccentric 22 of the dampening unit and the rollers 9, 10 and 6 would remain in contact with one another.
  • the roller 8 would be pre-moistened and the rollers 9, 10 and 6 would first be coated with an ink film.
  • a sequential circuit can be provided, with the help of which the application roller 6 for the printing ink and the dampening solution can also be switched on or off. This makes it easier to operate the device, especially if the ink and dampening solution are to be balanced before printing begins.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP86200820A 1985-07-23 1986-05-12 Dispositif de mouillage pour machine à imprimer Expired - Lifetime EP0210671B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3526236 1985-07-23
DE19853526236 DE3526236A1 (de) 1985-07-23 1985-07-23 Feuchtwerk

Publications (3)

Publication Number Publication Date
EP0210671A2 true EP0210671A2 (fr) 1987-02-04
EP0210671A3 EP0210671A3 (en) 1988-07-27
EP0210671B1 EP0210671B1 (fr) 1990-11-07

Family

ID=6276469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86200820A Expired - Lifetime EP0210671B1 (fr) 1985-07-23 1986-05-12 Dispositif de mouillage pour machine à imprimer

Country Status (6)

Country Link
US (1) US4671175A (fr)
EP (1) EP0210671B1 (fr)
JP (1) JPS6225046A (fr)
CA (1) CA1284059C (fr)
DE (2) DE3526236A1 (fr)
ES (1) ES8706532A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722829A2 (fr) * 1995-01-17 1996-07-24 MAN Roland Druckmaschinen AG Procédé et dispositif de mouillage pour étaler un agent mouillant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796530A (en) * 1987-06-01 1989-01-10 Pathfinder Graphic Associates Inc. Oscillating roll for printing presses
DE3840505C2 (de) * 1987-12-10 1999-05-12 James J Keller Vorrichtung zum Befeuchten des Druckzylinders einer lithographischen Druckerpresse
DE4003412A1 (de) * 1990-02-05 1991-08-08 Koenig & Bauer Ag Buerstenfeuchtwerk
US5022322A (en) * 1990-04-18 1991-06-11 Keller James J Metering roller control apparatus
JP4747690B2 (ja) * 2005-06-14 2011-08-17 日産自動車株式会社 ダイカスト装置
US20130033686A1 (en) * 2011-08-05 2013-02-07 Palo Alto Research Center Incorporated Direct Application of Dampening Fluid for a Variable Data Lithographic Apparatus
US20130033687A1 (en) * 2011-08-05 2013-02-07 Palo Alto Research Center Incorporated Method for Direct Application of Dampening Fluid for a Variable Data Lithographic Apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1951976A1 (de) * 1969-10-15 1971-04-22 Roland Offsetmaschf Feuchteinrichtung fuer lithographische Druckmaschinen
DE2221289B1 (de) * 1972-04-29 1973-07-05 Maschf Augsburg Nuernberg Ag Von einem farbwerk getrennt angeordnetes feuchtwerk fuer rotationsoffsetdruckmaschinen
FR2213851A1 (fr) * 1973-01-16 1974-08-09 Maschf Augsburg Nuernberg Ag

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168037A (en) * 1960-05-02 1965-02-02 Harold P Dahlgren Means for dampening lithographic offset printing plates
US3259062A (en) * 1964-11-30 1966-07-05 Harold P Dahlgren Process for applying a water-soluble organic dampening fluid
US3508489A (en) * 1969-05-15 1970-04-28 Harris Intertype Corp Fluid applying mechanism
US3673959A (en) * 1970-04-22 1972-07-04 North American Rockwell Dampening system for lithographic printing press
US3991674A (en) * 1971-03-19 1976-11-16 Petri Nello J Dampening apparatus for a lithograph offset printing plate
DE2439999B2 (de) * 1974-08-21 1976-12-30 Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Fluessigkeitsauftragvorrichtung fuer rotationsdruckmaschinen
DE3336875A1 (de) * 1983-10-11 1985-04-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum befeuchten von druckplatten in rotationsdruckmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1951976A1 (de) * 1969-10-15 1971-04-22 Roland Offsetmaschf Feuchteinrichtung fuer lithographische Druckmaschinen
DE2221289B1 (de) * 1972-04-29 1973-07-05 Maschf Augsburg Nuernberg Ag Von einem farbwerk getrennt angeordnetes feuchtwerk fuer rotationsoffsetdruckmaschinen
FR2213851A1 (fr) * 1973-01-16 1974-08-09 Maschf Augsburg Nuernberg Ag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0722829A2 (fr) * 1995-01-17 1996-07-24 MAN Roland Druckmaschinen AG Procédé et dispositif de mouillage pour étaler un agent mouillant
EP0722829A3 (fr) * 1995-01-17 1997-01-02 Roland Man Druckmasch Procédé et dispositif de mouillage pour étaler un agent mouillant

Also Published As

Publication number Publication date
DE3526236A1 (de) 1987-01-29
ES556117A0 (es) 1987-07-01
EP0210671B1 (fr) 1990-11-07
DE3675453D1 (de) 1990-12-13
CA1284059C (fr) 1991-05-14
JPS6225046A (ja) 1987-02-03
ES8706532A1 (es) 1987-07-01
EP0210671A3 (en) 1988-07-27
US4671175A (en) 1987-06-09

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