EP0606581B1 - Dispositif de nettoyage automatique des cylindres de blanchet d'une rotative à rouleaux - Google Patents

Dispositif de nettoyage automatique des cylindres de blanchet d'une rotative à rouleaux Download PDF

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Publication number
EP0606581B1
EP0606581B1 EP93119525A EP93119525A EP0606581B1 EP 0606581 B1 EP0606581 B1 EP 0606581B1 EP 93119525 A EP93119525 A EP 93119525A EP 93119525 A EP93119525 A EP 93119525A EP 0606581 B1 EP0606581 B1 EP 0606581B1
Authority
EP
European Patent Office
Prior art keywords
rubber
brush roller
web
blanket cylinder
blanket
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
EP93119525A
Other languages
German (de)
English (en)
Other versions
EP0606581A1 (fr
Inventor
Barry Mark Jackson
Dave Charles Gibson
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0606581A1 publication Critical patent/EP0606581A1/fr
Application granted granted Critical
Publication of EP0606581B1 publication Critical patent/EP0606581B1/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
    • B41P2235/23—Brushes

Definitions

  • the present invention relates generally to a cleaning device for printing units and in particular to a device for automatically cleaning blanket cylinders in a lithographic offset printing machine.
  • blanket cylinders In offset printing machines, the function of the blanket cylinders is to transfer the print images from the printing plates to a material web. Significantly, blanket cylinders carry blankets with an attached rubber layer through which the printed images are transferred.
  • one or more printing plates are wound around the outer surface of a plate cylinder which rotates in contact with the blanket cylinder.
  • a web of material runs between two blanket cylinders, which are mounted in such a way that one blanket cylinder serves as a printing cylinder for the other, resulting in the simultaneous printing on both sides of the web of material.
  • the present invention provides a device for cleaning a blanket cylinder in a web offset printing press, which comprises the following features: at least one brush roller for removing foreign objects from the blanket cylinder; means for positioning the brush roller against the blanket cylinder and the web; and means for cleaning the brush roller from the foreign matter removed from the blanket cylinder.
  • the present invention can also be used to clean the impression cylinder as well as the blanket cylinder and blanket.
  • the present invention also provides a device for spraying the brush roller with a blanket washing solution.
  • the brush roller, the blanket cylinder and the web form a closed area and thus create a barrier which prevents blanket washing solution and foreign matter from getting into the adjacent inking and dampening units. This helps to maintain the print quality of the printed products during the printing process.
  • FIG. 1 shows a device 10 for the automatic cleaning of blanket cylinders with an upper washing unit 12 and a lower washing unit 14.
  • the upper washing unit 12 has a rotating brush roller 16, which is simultaneously with an upper blanket cylinder 18, on which a blanket 20 is axially attached, and comes into contact with a web 22.
  • the lower washing unit 14 has the same rotating brush roller 24, which simultaneously comes into contact with a lower blanket cylinder 26, on which a blanket 28 is axially attached, and with the web 22.
  • the cleaning device 10 is preferably integrated into a printing unit of the printing press.
  • the upper and lower washing units 12 and 14 are in a parking position. In this position, namely in the OFF mode (not shown), the upper washing unit 12 is next to the upper blanket cylinder 18 and above the web 22, but is not in contact with the upper blanket cylinder or web, and the lower washing unit 14 is adjacent to the lower blanket cylinder 26 and below the web 22, but is not in contact with the lower blanket cylinder or web.
  • the cleaning device 10 When the cleaning device 10 is in the OFF mode, the machine can run at normal speed with the web 22 moving between the upper and lower washing units 12 and 14 and a normal one Allows printing. If the upper and lower blankets 20 and 28 are to be cleaned, the cleaning device 10 can be moved to its starting position at any machine speed up to 914 m (3000 feet) per minute.
  • the cleaning device 10 is moved into its setting position by pneumatic cylinders. These pneumatic cylinders move the cleaning device 10 on a straight path at an angle of 24 1/2 ° to the web 22 towards the blanket cylinders 18 and 26 until the brush roller 16 is in contact with the blanket cylinder 18 and the web 22 and the brush roller 24 is in contact with the blanket cylinder 26 and the web 22. In both the set and set positions, the cleaning device 10 serves as protection, thereby preventing an operator's hand or arm from getting into the gap between the upper and lower blanket cylinders 18 and 26.
  • the brush roller 16 rotates in the same direction, but at a lower driving speed than the blanket cylinder 18, so that a respective point corresponding to an opposite point near the contact point of the brush roller 16 and the upper blanket cylinder 18 moves in the opposite direction .
  • the brush roller 16 can brush over the surface of the rubber blanket 20 and clean it of foreign bodies and other dirt.
  • the brush roller 16 is supplied with a washing solution containing a solvent, for example water. With the brush roller, the foreign bodies are then released from the pores of the rubber blanket 20 and through the gap between the upper and lower blanket cylinders 18 and 26 running web 22 removed. Any residues remaining after the brush roller 16 comes into contact with the rubber blanket 20 on the brush roller, consisting of blanket washing solution and foreign bodies, are removed from the brush roller 16 by a stripper roller 30 and conveyed onto the web 22.
  • a washing solution containing a solvent for example water.
  • the brush roller 16, the blanket cylinder 18 and the web 22 form an upper closed triangular area.
  • the web 22 coming into contact with the brush roller 16 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter forming from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface.
  • the blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.
  • a stripper roller 30, the surface speed of which is lower than that of the brush roller 16, is rotated in contact with the brush roller 16.
  • the stripper roller 30 throws foreign objects from the brush roller 16 directly onto the web 22.
  • the stripper roller 30 is mounted within the upper triangular region; as a result, no foreign bodies can collect on the stripper roller 30 and it is also self-cleaning.
  • the stripper roller 30 may have a smooth surface, but preferably it has grooves extending axially along its length.
  • the lower washing unit 14 is operated in a similar manner to the upper washing unit 12.
  • the lower one Blanket cylinder 26 and brush roller 24 contacting web 22 simultaneously rotate in the same direction, but at a lower driving speed than blanket cylinder 26, so that a respective point corresponding to an opposite point near the contact point of brush roller 24 and lower blanket cylinder 26 is in opposite directions Moving direction.
  • the brush roller 24 can brush over the surface of the rubber blanket 28 and clean it of foreign bodies and other dirt.
  • the brush roller 24, the blanket cylinder 26 and the web 22 form a lower closed triangular area.
  • the web 22 coming into contact with the brush roller 24 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter formed from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface.
  • the blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.
  • a stripper roller 32 the surface speed of which is lower than that of the brush roller 24, is rotated in contact with the brush roller 24.
  • the stripper roller 32 throws foreign bodies from the brush roller 24 directly onto the web 22.
  • the stripper roller 32 is mounted within the lower triangular region; as a result, no foreign bodies can collect on the stripper roller 32 and it is also self-cleaning.
  • the stripping roller 32 can be a have a smooth surface, but preferably it has grooves extending axially along its length.
  • a drip container 34 is provided under the lower washing unit 14, in which the dirty water can collect.
  • the upper wash unit 12 includes a spray shield 36 which can be pivoted about the brush roller 16 away from the web 22 when the cleaning device is actuated.
  • the spray shield 36 is pivoted about a slide bearing bush 38 of the brush roller 16 and moved forwards and backwards by a joint 40 when the upper washing unit 12 slides into its setting position.
  • the shield 36 is prevented from contacting the web 22 and the brush roller 16 is allowed to form the third leg of the triangle.
  • the shield 36 in its retracted position also functions as a drip tray. Excess blanket washing solution that could drip from the brush roller 16 is collected by the shield 36 and thus prevents drops from falling directly onto the web 22. Drain holes 42 are provided at each end of the shield 36 so that excess solution can flow into the drip container 34.
  • the brush rollers are driven by an air motor 44 via a gear train 46.
  • the air flow is throttled on the outlet side of the air motor 44.
  • a throttled exhaust line maintains the engine at a constant RPM at over 30% of the machine speed at a given air pressure.
  • the motor 44 is on one Cross connection attached so that it is protected from solvents and foreign bodies.
  • the blanket wash solution is fed to the brush roll 16 through a spray bar 48 having a plurality of side openings through which the wash solution is sprayed, as shown in FIG. 2. These openings are created diametrically so that a uniform flow through each opening is ensured.
  • a sealing screen is provided in order to divert the blanket washing solution to selected openings so that it is only applied to the part of the brush roller 16 that comes into contact with the web.
  • This sealing screen consists of sleeves 50 which fit over the spray bar 48 and are rotated in such a way that they close the openings.
  • the sleeves 50 are preferably 11.4 cm (4.5 inches) long, which is half the width of a sheet, and are attached along the length of the spray bar 48.
  • Joints 52 are provided which move the sleeves 50 into position.
  • the hinges 52 connect the sleeves 50 to sleeves 54.
  • the sleeves 54 are placed around a cross connection 56 and also moved into position to open or close the respective sealing screen.
  • the position of the cuffs 54 determines the opening and / or closing during web retraction since any regulation that would require closure would be off the web.
  • Rubber blanket washing solution overflowing from the spray bar 48 is collected in a groove 58 provided under the spray bar 48, as shown in FIG. 2.
  • This blanket washing solution is passed through a drain pipe 60 into the drip container 34 and fed to a reprocessing system, as shown in FIG. 1.
  • the lower wash unit 14 has a similar blanket wash solution delivery system with a spray bar 62 as shown in FIG. 1. However, instead of a pivotable spray shield, a drip container 34 is used for excess washing solution which may drip from the brush roller 24.
  • the drip container 34 has a wire mesh 64 which is located at a distance from the bottom of the drip container and is provided with disposable filter paper 66 which completely covers the wire mesh.
  • the solids are thus filtered out of the blanket washing solution, which is now contaminated with paint, and in this way clogging of the sewage pipes is prevented.
  • the blanket wash solution is then pumped into a waste water tank for further distillation.
  • the application of the present invention is also intended for various other arrangements, for example for cleaning the printing cylinders and the blanket cylinders and blankets.
  • the present invention is therefore not intended to be limited to cleaning the blanket-to-blanket printing units.

Landscapes

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

Claims (19)

  1. Dispositif de nettoyage d'un cylindre de blanchet d'une machine rotative à imprimer, qui comprend les particularités suivantes :
       au moins un rouleau brosseur (16, 24) d'élimination de corps étrangers du cylindre de blanchet (18, 26) ; un dispositif mettant en contact le rouleau brosseur (16, 24) avec le cylindre de blanchet (18, 26) et la feuille continue (22) ; et un dispositif (30, 32) de nettoyage du rouleau brosseur (16, 24) pour en enlever les corps étrangers éliminés du cylindre de blanchet (18, 26).
  2. Dispositif selon la revendication 1,
       caractérisé
       en ce que, lorsque le rouleau brosseur (16, 24) est en position de contact, le cylindre de blanchet (18, 26) et la feuille continue (22) forment une zone triangulaire fermée et en ce que le dispositif (30, 32) de nettoyage du rouleau brosseur se trouve à l'intérieur de ladite zone.
  3. Dispositif selon la revendication 2, qui comprend par ailleurs : un dispositif de commande du rouleau brosseur (16, 24) indépendamment du cylindre de blanchet (18, 26) de manière que ledit rouleau brosseur (16, 24) soit rotatif dans le même sens que celui, mais avec une vitesse d'entraînement qui est inférieure à celle dudit cylindre de blanchet (18, 26).
  4. Dispositif selon la revendication 3, qui comprend par ailleurs : un dispositif (48, 62) de pulvérisation d'une solution de lavage du blanchet sur le rouleau brosseur (16, 24).
  5. Dispositif selon la revendication 4,
       caractérisé
       en ce que le cylindre de blanchet (18, 26) comprend un blanchet (20, 28) se montant axialement sur lui.
  6. Dispositif selon la revendication 3,
       caractérisé
       en ce que le dispositif de commande est un moteur pneumatique (44).
  7. Dispositif selon la revendication 1,
       caractérisé
       en ce que le dispositif de nettoyage du rouleau brosseur est un rouleau racleur (30, 32) qui tourne à une vitesse superficielle inférieure à celle dudit rouleau brosseur (16, 24).
  8. Dispositif selon la revendication 7,
       caractérisé
       en ce que le rouleau racleur (30, 32) comprend des rainures se prolongeant axialement sur sa longueur.
  9. Dispositif selon la revendication 4,
       caractérisé
       en ce que le dispositif de pulvérisation est une tubulure de pulvérisation (48, 62) qui comporte de multiples trous latéraux par lesquels la solution de lavage du blanchet est pulvérisée.
  10. Dispositif selon la revendication 9, qui comprend par ailleurs : de multiples manchons (50) ajustés sur la tubulure de pulvérisation (48, 62), associés au multiples trous latéraux, dont la position peut être tournée et qui peuvent fermer des trous sélectionnés, de manière que, lors de l'impression en continu sur une feuille continue étroite, la solution de lavage du blanchet ne puisse être déposée que sur la partie du rouleau brosseur (16, 24) qui est en contact avec la feuille continue.
  11. Dispositif selon la revendication 1,
       caractérisé
       en ce que le dispositif qui met en contact le rouleau brosseur (16, 24) avec le cylindre de blanchet (16, 26) et la feuille continue (22) est un vérin pneumatique.
  12. Dispositif selon la revendication 1, qui comprend par ailleurs : un masque de pulvérisation (36) monté rotatif autour du rouleau brosseur (16, 24) et qui subit une rotation pour être éloigné de la feuille continue lors de l'actionnement du dispositif (10).
  13. Dispositif selon la revendication 4, qui comprend par ailleurs : un récipient collecteur d'égouttement (34) placé sous le rouleau brosseur (16, 24).
  14. Dispositif selon la revendication 13,
       caractérisé
       en ce que le récipient collecteur d'égouttement (34) comprend un grillage (64) placé à distance de son fond et sur lequel est disposé un papier filtre interchangeable (66) destiné à éliminer par filtrage les particules solides d'encre de la solution salie de lavage du blanchet.
  15. Dispositif de nettoyage d'un cylindre supérieur de blanchet et d'un cylindre inférieur de blanchet d'une machine rotative à imprimer, qui comprend les particularités suivantes :
       un rouleau brosseur supérieur (16) d'élimination de corps étrangers du cylindre supérieur de blanchet (18) ; un rouleau brosseur inférieur (24) d'élimination de corps étrangers du cylindre inférieur de blanchet (26) ; un dispositif mettant en contact ledit rouleau brosseur supérieur (16) avec ledit cylindre supérieur de blanchet (18) et avec la feuille continue (22) et mettant en contact ledit rouleau brosseur inférieur (24) avec ledit cylindre inférieur de blanchet (26) et la feuille continue (22) ; un premier dispositif (30) de nettoyage dudit rouleau brosseur supérieur (16) pour en enlever les corps étrangers éliminés dudit cylindre supérieur de blanchet (18) ; et un second dispositif (32) de nettoyage dudit rouleau brosseur inférieur (24) pour en enlever les corps étrangers éliminés dudit cylindre inférieur de blanchet (26).
  16. Dispositif selon la revendication 15,
       caractérisé
       en ce que, à la position de contact, le rouleau brosseur supérieur (16), le cylindre supérieur de blanchet (18) et la feuille continue (22) forment une zone triangulaire supérieure fermée et le premier dispositif (30) de nettoyage de rouleau brosseur se trouve à l'intérieur de ladite zone triangulaire supérieure et le rouleau brosseur inférieur (24), le cylindre inférieur de blanchet (26) et la feuille continue (22) forment une zone triangulaire inférieure fermée et le second dispositif (32) de nettoyage du rouleau brosseur se trouve à l'intérieur de ladite zone triangulaire inférieure.
  17. Dispositif selon la revendication 16, qui comprend par ailleurs : un dispositif (48, 62) de pulvérisation d'une solution de lavage du blanchet sur les rouleaux brosseurs supérieur et inférieur (16, 24).
  18. Dispositif de nettoyage d'un cylindre de blanchet et d'un cylindre d'impression d'une machine rotative à imprimer, qui comprend les particularités suivantes :
       un premier rouleau brosseur supérieur (16) d'élimination de corps étrangers du cylindre de blanchet (18) ; un second rouleau brosseur (24) d'élimination de corps étrangers du cylindre d'impression ; un dispositif qui met en contact le premier rouleau brosseur (16) avec le cylindre de blanchet (18) et la feuille continue (22) et qui met en contact ledit second rouleau brosseur (24) avec ledit cylindre d'impression et la feuille continue (22) ; un dispositif (30) de nettoyage du premier rouleau brosseur supérieur (16) pour en enlever les corps étrangers éliminés dudit cylindre de blanchet (18) ; et un second dispositif (32) de nettoyage du second rouleau brosseur (24) pour en enlever les corps étrangers éliminés dudit cylindre d'impression.
  19. Dispositif selon la revendication 18,
       caractérisé
       en ce que, à la position de contact, le premier rouleau brosseur (16), le cylindre de blanchet (18) et la feuille continue (22) forment une zone triangulaire supérieure fermée et le premier dispositif (30) de nettoyage de rouleau brosseur se trouve à l'intérieur de ladite zone triangulaire supérieure et ledit second rouleau brosseur (24), le cylindre d'impression et la feuille continue (22) forment une zone triangulaire inférieure fermée et le second dispositif (32) de nettoyage de rouleau brosseur se trouve à l'intérieur de ladite zone triangulaire inférieure.
EP93119525A 1993-01-12 1993-12-03 Dispositif de nettoyage automatique des cylindres de blanchet d'une rotative à rouleaux Expired - Lifetime EP0606581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3355 1993-01-12
US08/003,355 US5257578A (en) 1993-01-12 1993-01-12 Device for automatically cleaning blanket cylinders in a offset printing press

Publications (2)

Publication Number Publication Date
EP0606581A1 EP0606581A1 (fr) 1994-07-20
EP0606581B1 true EP0606581B1 (fr) 1996-07-31

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EP93119525A Expired - Lifetime EP0606581B1 (fr) 1993-01-12 1993-12-03 Dispositif de nettoyage automatique des cylindres de blanchet d'une rotative à rouleaux

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Country Link
US (1) US5257578A (fr)
EP (1) EP0606581B1 (fr)
DE (2) DE4340542A1 (fr)

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DE29516976U1 (de) * 1995-10-26 1995-12-21 MAN Roland Druckmaschinen AG, 63075 Offenbach Waschvorrichtung zur Reinigung von Zylindern eines Offsetdruckwerkes
DE19606768C1 (de) * 1996-02-23 1997-04-17 Roland Man Druckmasch Verfahren zum Betrieb einer Druckmaschine mit einer Waschvorrichtung
US5755158A (en) * 1996-08-28 1998-05-26 Presstek, Inc. Alternately engageable, dual-stage cleaning system for lithographic printing plates
US6484635B2 (en) 2000-11-29 2002-11-26 Heidelberger Druckmaschinen Ag Variable-width spray applicator for a printing press
JP2002244473A (ja) * 2001-02-14 2002-08-30 Canon Inc 定着装置及びこの定着装置を備える画像形成装置
US6691617B2 (en) 2001-03-27 2004-02-17 Heidelberger Druckmaschinen Ag Apparatus for selectively cleaning a printing press cylinder
US7469121B2 (en) * 2006-11-06 2008-12-23 Xerox Corporation Soft contact portion flicker bar assembly and a toner image reproduction machine including same
CN103991273A (zh) * 2014-05-28 2014-08-20 太仓市鑫鹤印刷包装有限公司 一种新型纸管印刷机结构
DE102014113180B4 (de) 2014-09-12 2019-01-31 Manroland Goss Web Systems Gmbh System aus mehreren Reinigungsvorrichtungen sowie Druckmaschine

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Also Published As

Publication number Publication date
DE59303360D1 (de) 1996-09-05
US5257578A (en) 1993-11-02
DE4340542A1 (de) 1994-07-14
EP0606581A1 (fr) 1994-07-20

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