EP0573801B1 - Dispositif de lavage pour un cylindre blanchet d'une presse à imprimer - Google Patents

Dispositif de lavage pour un cylindre blanchet d'une presse à imprimer Download PDF

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Publication number
EP0573801B1
EP0573801B1 EP19930107766 EP93107766A EP0573801B1 EP 0573801 B1 EP0573801 B1 EP 0573801B1 EP 19930107766 EP19930107766 EP 19930107766 EP 93107766 A EP93107766 A EP 93107766A EP 0573801 B1 EP0573801 B1 EP 0573801B1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
washing
trough
roller
blanket cylinder
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
EP19930107766
Other languages
German (de)
English (en)
Other versions
EP0573801A1 (fr
Inventor
Claus Simeth
Klaus Dürrnagel
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 DE4218211A external-priority patent/DE4218211C2/de
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0573801A1 publication Critical patent/EP0573801A1/fr
Application granted granted Critical
Publication of EP0573801B1 publication Critical patent/EP0573801B1/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
    • 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
    • B41P2235/22—Rollers

Definitions

  • the invention relates to a washing device for a blanket cylinder of a printing machine with a tub for a washing liquid, with a drivable on rotation, can be brought into contact with the blanket cylinder and provided with a cover, and also with a plurality of axially spaced, attached to a wall of the tub Spray nozzles for spraying the washing roller with the washing liquid, and with a doctor blade arranged parallel to the axis of the washing roller, which is held on the tub and which is operatively connected to a plurality of adjusting screws which are screwed into the wall of the tub distributed over the length of the doctor blade.
  • a washing device with these features is described in DE-39 03 434 C2.
  • a plurality of stop pins are screwed into the front wall of the trough, the tips of which rest on the top of the squeegee.
  • several further stop screws are also screwed into the front wall of the trough, the tips of which abut the rear wall of the squeegee.
  • the doctor blade is thus supported in two directions by means of these two setscrew systems, namely against bending upwards and forwards towards the front wall of the tub.
  • German utility model 70 05 448 which describes a roller doctor blade of a coating device which is supported on its side facing away from the coating cylinder by a plurality of pneumatic pistons which are spaced apart in the longitudinal direction of the doctor blade.
  • an approximately semi-cylindrical receptacle is formed in the front of each pneumatic piston, in which the doctor blade is inserted.
  • the roller doctor is supported upwards and downwards and also in a direction of force away from the cylinder, but not in a direction of force towards the cylinder.
  • unpleasant vibrations can occur in operation, which have a negative effect on the quality of the product produced with them.
  • the US 35 21 561 describes a color meter of a printing cylinder, the deflection of which can be adjusted with the aid of a plurality of spaced screws, that is to say in the tangential direction of the cylinder. An adjustment in the radial direction is not possible with this known construction.
  • a washing device is known from EP 0 535 356 A1, cited in accordance with Article 54 (3) and (4) EPC, the doctor blade of which is attached to the Trough is held and is operatively connected to the washing roller by means of several adjusting screws.
  • an inking unit is known, the washing roller of which is in contact with an inking roller.
  • the doctor blade is not in operative connection with the washing roller, but with the inking roller.
  • an inking unit is known from US Pat. No. 3,559,573, the ink slides of which are operatively connected to an ink fountain roller by means of adjusting screws.
  • the invention is therefore based on the object to propose a washing device with the features of the preamble of claim 1, with the aid of which it is possible to set the position of the doctor blade very precisely without the disadvantageous vibrations and chatter phenomena described occurring during operation.
  • the invention is characterized in that the set screws are positively connected to the squeegee.
  • connection of the set screws to the squeegee means that a movement of these two parts against one another is not possible or is only possible to a limited extent in the elastic range. If the transferable force is exceeded, the connection would be destroyed.
  • the set screws are form-fitting engage in blind holes in the squeegee.
  • the blind holes are therefore only accessible to the side of the tub front wall and the material of the doctor blade therefore surrounds the blind holes from all other sides, so that the material of the doctor blade on these sides prevents any movement of the doctor blade relative to the adjusting screws. Movement in the longitudinal direction of the set screws is reliably prevented by the positive connection of the two parts.
  • a preferred embodiment is characterized in that the set screws have two threaded sections with different pitches, with which they are screwed into corresponding counter threads in the wall of the tub or in the squeegee. If you turn the adjusting screw, these measures cause the doctor blade to be turned on or off the washing roller and the threaded connection simultaneously produces the necessary positive connection between these two parts.
  • the washing device shown is mounted such that it can be tilted about an axis 2, so that it can be placed on a blanket cylinder (not shown in the drawing) or set down by it.
  • the washing device has a tub 3 and in the tub a rotatably mounted and driven washing roll 4, the direction of rotation of which is indicated in FIG. 2 by the arrow 5.
  • a plurality of spray nozzles 7 are fixed axially spaced apart, which direct a spray jet of the detergent onto the washing roller 4, but not onto the bottom of the tub.
  • a doctor blade 8 which has blind bores 9 with threaded sections spaced apart from one another, into which set screws 10 are screwed with their front threaded sections.
  • the set screws have further threaded sections 11, with which they are screwed into corresponding counter threads in the front wall 6 of the tub or into bushings inserted there.
  • sheets 12, 13 are arranged in the tub for draining off the washing or spraying water.
  • the threaded sections 9, 11 of the set screws 10 have different pitches. So if you turn the set screws, the squeegee 8 is placed in the longitudinal direction of the set screws on the washing roller 4 or switched off by it. This is done zone by zone via the plurality of adjusting screws 10 which are spaced apart from one another.
  • the respectively set position of the set screws can be fixed via nuts 14.
  • the doctor blade 8 can be finely adjusted zone by zone with the aid of the adjusting screws 10 with differential threads 9, 11 arranged in zones, whereby it is held on all sides by the adjusting screws in a force-fitting and positive manner.
  • the described vibrations and chatter phenomena which are disadvantageous in the prior art, can no longer occur. This is achieved inexpensively using a single system of set screws or zone screws.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Cleaning In General (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (2)

  1. Dispositif de lavage pour un cylindre porte-blanchet d'une machine d'impression, comportant une cuve (3) pour un liquide de lavage, un rouleau laveur (4) pouvant être entraîné en rotation, pouvant être amené au contact du cylindre porte-blanchet et muni d'un revêtement, de plus plusieurs buses de pulvérisation (7) agencées en étant décalées axialement et fixées à une paroi de la cuve (3), pour pulvériser le rouleau laveur (4) en liquide de lavage, et un racloir (8) agencé à axe parallèle au rouleau laveur (4), maintenu sur la cuve (3) et en liaison active avec plusieurs vis de réglage (10) vissées dans la paroi de la cuve (3), en étant réparties sur la longueur du racloir (8), caractérisé en ce que les vis de réglage (10) reliées de façon mécanique au racloir (8) présentent deux tronçons filetés (9,11) pourvus de pas différents, par lesquels elles sont vissées dans des contre-filetages correspondants, respectivement dans la paroi (6) de la cuve (3) et dans le racloir (8).
  2. Dispositif de lavage selon la revendication 1,
    caractérisé en ce que les vis de réglage (10) agissent mécaniquement dans des perçages borgnes (9) du racloir (8).
EP19930107766 1992-06-03 1993-05-13 Dispositif de lavage pour un cylindre blanchet d'une presse à imprimer Expired - Lifetime EP0573801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4218211 1992-06-03
DE4218211A DE4218211C2 (de) 1991-06-06 1992-06-03 Waschvorrichtung für einen Gummituchzylinder einer Druckmaschine

Publications (2)

Publication Number Publication Date
EP0573801A1 EP0573801A1 (fr) 1993-12-15
EP0573801B1 true EP0573801B1 (fr) 1996-10-16

Family

ID=6460252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930107766 Expired - Lifetime EP0573801B1 (fr) 1992-06-03 1993-05-13 Dispositif de lavage pour un cylindre blanchet d'une presse à imprimer

Country Status (3)

Country Link
EP (1) EP0573801B1 (fr)
JP (1) JP2620491B2 (fr)
ES (1) ES2094412T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442216B4 (de) 1994-11-26 2004-12-02 Baldwin Germany Gmbh Waschvorrichtung für Rotationskörper in Druckmaschinen
DE4442217A1 (de) 1994-11-26 1996-05-30 Baldwin Gegenheimer Gmbh Waschvorrichtung für Rotationskörper in Druckmaschinen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363817A (en) * 1942-09-14 1944-11-28 Goss Printing Press Co Ltd Printing process and mechanism
US3408934A (en) * 1967-03-07 1968-11-05 Shelby M. Clausen Blanket cleaning attachment for offset presses
US3559573A (en) * 1968-08-12 1971-02-02 Hantscho Co George Ink fountain assembly and blade adjusting means therefor
JPS5564956A (en) * 1978-11-07 1980-05-16 Mitsubishi Heavy Ind Ltd Production of unidirectionally solidified material and apparatus thereof
JPS58101061A (ja) * 1981-12-12 1983-06-16 Komori Printing Mach Co Ltd 凹版印刷機のワイピング装置
JPH0798390B2 (ja) * 1987-03-09 1995-10-25 株式会社小森コーポレーション 凹版印刷機のワイピング装置
DE3903434A1 (de) * 1989-02-06 1990-08-09 Wolfgang Loessner Waschvorrichtung fuer den gummituchzylinder einer offset-druckmaschine
DE4129371C2 (de) * 1991-09-04 1994-08-11 Roland Man Druckmasch Vorrichtung zum Befeuchten einer Waschwalze

Also Published As

Publication number Publication date
JP2620491B2 (ja) 1997-06-11
ES2094412T3 (es) 1997-01-16
JPH0679865A (ja) 1994-03-22
EP0573801A1 (fr) 1993-12-15

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