EP0119538B1 - Scraper for a cylinder cleaning device - Google Patents

Scraper for a cylinder cleaning device Download PDF

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Publication number
EP0119538B1
EP0119538B1 EP84102353A EP84102353A EP0119538B1 EP 0119538 B1 EP0119538 B1 EP 0119538B1 EP 84102353 A EP84102353 A EP 84102353A EP 84102353 A EP84102353 A EP 84102353A EP 0119538 B1 EP0119538 B1 EP 0119538B1
Authority
EP
European Patent Office
Prior art keywords
roller
scraper
shaped tube
carrier
cleaning device
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
Application number
EP84102353A
Other languages
German (de)
French (fr)
Other versions
EP0119538A2 (en
EP0119538A3 (en
Inventor
Klaus Theilacker
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6193740&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0119538(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0119538A2 publication Critical patent/EP0119538A2/en
Publication of EP0119538A3 publication Critical patent/EP0119538A3/en
Application granted granted Critical
Publication of EP0119538B1 publication Critical patent/EP0119538B1/en
Expired 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

Definitions

  • the invention has for its object to provide a very simple doctor blade of the type mentioned, which rests over the entire width of the roller to be doctored with a uniform pressure force on this.

Landscapes

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

Description

Die Erfindung betrifft eine Rakel für eine Walzenwaschvorrichtung einer Druckmaschine.The invention relates to a doctor blade for a roller washing device of a printing press.

Eine derartige Rakel ist aus der US-PS 2 199 469 bekannt. Sie besteht aus einem Rakelmesser, das an einem schwenkbaren Träger angeschraubt ist und durch Schwenkung des Trägers gegen eine Walze des zu waschenden Walzenstockes der Druckmaschine angestellt werden kann. Bei einer derartigen Anordnung besteht die Gefahr, daß das Rakelmesser, bedingt sowohl durch Spannungen beim Anschrauben als auch durch Verwindungen des Messerträgers, nicht über die volle Breite mit gleichmäßigem Druck an die abzurakelnde Walze angestellt werden kann. Dabei besteht zum einen der Nachteil"daß die Walze nicht völlig sauber abgerakelt wird. Zum anderen besteht jedoch auch die Gefahr, daß die unter höherem Druck angestellten Teile der Rakel von der Walze partiell abgeschliffen werden. Darüber hinaus ist eine derartige Rakeleinrichtung aus mehreren Teilen zusammengesetzt. Bei umsteuerbaren Maschinen und bei platzbedingter Anordnung mit gegenläufiger Rakelwirkung besteht zudem die Gefahr, daß die Walze bei ungleicher Anstellung die Rakelkante mitnimmt und die Rakel damit umkippt.Such a doctor blade is known from US Pat. No. 2,199,469. It consists of a doctor blade which is screwed to a pivotable carrier and can be turned against a roller of the roller block of the printing machine to be washed by pivoting the carrier. With such an arrangement, there is a risk that the doctor blade, due to both tension during screwing and twisting of the knife carrier, cannot be applied to the roller to be doctored over the full width with uniform pressure. On the one hand, there is the disadvantage that the roller is not scraped off completely cleanly. On the other hand, there is also the risk that the parts of the doctor blade which are under higher pressure will be partially ground off the roller. In addition, such a doctor blade device is composed of several parts In the case of reversible machines and in the case of a space-dependent arrangement with an opposing squeegee effect, there is also the risk that the roller will take the squeegee edge with it if it is positioned unevenly and thus tip over the squeegee.

Der Erfindung liegt die Aufgabe zugrunde, eine sehr einfach aufgebaute Rakel der eingangs genannten Gattung zu schaffen, die über die ganze Breite der abzurakelnden Walze mit gleichmäßiger Andruckkraft an dieser anliegt.The invention has for its object to provide a very simple doctor blade of the type mentioned, which rests over the entire width of the roller to be doctored with a uniform pressure force on this.

Diese Aufgabe wird durch Anwendung der im Kennzeichen des Anspruches 1 angegebenen Maßnahmen gelöst.This object is achieved by applying the measures specified in the characterizing part of claim 1.

Eine andere Waschvorrichtung ist aus der GB-A-2 047 167 bekannt, bei der ein gesondertes Reinigungsband durch einen mit Druckluft beaufschlagbaren Schlauch gegen den zu reinigenden Zylinder der Druckmaschine andrückbar ist. Durch die Verwendung des Reinigungsbandes ist diese Vorrichtung relativ kompliziert.Another washing device is known from GB-A-2 047 167, in which a separate cleaning belt can be pressed against the cylinder of the printing press to be cleaned by a hose which can be pressurized with compressed air. This device is relatively complicated due to the use of the cleaning tape.

Mit Druckluft beaufschlagbare Schlauchrakel sind zwar an sich aus der FR-A-2 074 447 bekannt, diese dienen aber ausschließlich als Auftragsrakel bei Siebdruckschablonen oder Rotationsdruckmaschinen zum Auftragen von Farbe.Tubular doctor blades which can be acted upon with compressed air are known per se from FR-A-2 074 447, but these serve exclusively as application doctor blades in screen printing stencils or rotary printing machines for applying ink.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung zweier Ausführungsbeispiele anhand der Zeichnung. Auf dieser zeigt :

  • Fig. 1 ein erstes Ausführungsbeispiel einer erfindungsgemäßen Rakel und
  • Fig. 2 ein zweites Ausführungsbeispiel jeweils in einer Schnittdarstellung.
Further features and advantages of the invention emerge from the subclaims and the following description of two exemplary embodiments with reference to the drawing. This shows:
  • Fig. 1 shows a first embodiment of a doctor blade according to the invention and
  • Fig. 2 shows a second embodiment in each case in a sectional view.

Die Rakel nach Fig. 1 umfaßt einen Profilschlauch 1, der mit Druckluft beaufschlagbar bzw. druckentlastbar ist. Der Profilschlauch 1 ist auf der einer abzurakelnden Walze 2 zugewandten Seite mit einem parallel zur Achse der Walze 2 verlaufenden Rakelsteg 3 versehen. Dieser Rakelsteg kann wie beim Ausführungsbeispiel einstückig mit dem Profilschlauch 1 hergestellt sein. Es besteht jedoch auch die Möglichkeit, den Rakelsteg 3 aus einem härteren Material herzustellen und dann mit dem Profilschlauch 1 fest zu verbinden, beispielsweise durch Verkleben. Auch können zwei oder mehr Rakelstege vorgesehen werden.1 comprises a profile tube 1 which can be pressurized with compressed air or pressure relieved. The profile tube 1 is provided on the side facing a roller 2 to be scraped off with a doctor web 3 running parallel to the axis of the roller 2. As in the exemplary embodiment, this doctor blade web can be produced in one piece with the profile tube 1. However, there is also the possibility of producing the doctor blade web 3 from a harder material and then firmly connecting it to the profile tube 1, for example by gluing. Two or more doctor bars can also be provided.

Die der Walze 2 abgewandte Seite des Profilschlauches ist mit einer Fußleiste 4 versehen. Diese Fußleiste 4 greift zur Festlegung des Profilschlauches 1 in eine etwa T-förmige Führung eines starren Trägers 5 ein, der in nicht näher dargestellter Weise an den Seitenwänden, an denen auch die Achse der Walze 2 gelagert ist, befestigt ist.The side of the profile tube facing away from the roller 2 is provided with a baseboard 4. This baseboard 4 engages to fix the profile tube 1 in an approximately T-shaped guide of a rigid support 5, which is fastened in a manner not shown on the side walls on which the axis of the roller 2 is mounted.

Der Profilschlauch 1 ist so ausgebildet, daß er in der druckentlasteten Stellung die gestrichelt dargestellte Lage einnimmt. Durch Druckbeaufschlagung wölbt sich der Pröfilschlauch 1 in die mit ausgezogenen Linien dargestellte Lage auf, so daß der Rakelsteg 3 zur Anlage an der Walze 2 kommt. Da die Andruckkraft, mit der der Rakelsteg gegen die Walze 2 gedrückt wird, über die ganze Länge der Walze 2 konstant ist, liegt der Rakelsteg 3 gleichmäßig an dieser Walze an, so daß diese völlig gleichmäßig sauber abgerakelt wird. Da zum An- und Abstellen des Rakelsteges keine Schwenkbewegungen notwendig sind, ergibt sich durch Entfall von Schwenklagern ein sehr einfacher, platzsparender Aufbau.The profile hose 1 is designed so that it assumes the position shown in dashed lines in the pressure-relieved position. By applying pressure, the profiled tube 1 bulges into the position shown with solid lines, so that the doctor web 3 comes to rest on the roller 2. Since the pressure force with which the squeegee web is pressed against the roller 2 is constant over the entire length of the roller 2, the squeegee web 3 lies evenly on this roller, so that it is doctored off completely uniformly. Since no swiveling movements are required to switch the doctor bar on and off, the elimination of swivel bearings results in a very simple, space-saving construction.

Beim Ausführungsbeispiel gemäß Fig. 2 findet ein Profilschlauch 6 Verwendung, der in einen starren Träger 7 U-förmigen Querschnittes eingesetzt ist. Dabei ist die der abzurakelnden Walze 8 abgewandte Fläche 9 des Profilschlauches durch Verkleben mit dem Träger 7 fest verbunden. Das Innere des Profilschlauches 6 ist wiederum mit Druckluft beaufschlagbar bzw. druckentlastbar. In der mit ausgezogenen Linien dargestellten druckentlasteten Stellung verläuft die der abzurakelnden Walze 8 zugewandte Fläche 10 des Profilschlauches 6 einwärts gekrümmt, so daß in dieser Stellung keine Berührung zwischen der Fläche 10 und der Walze 8 erfolgt. Durch Druckluftbeaufschlagung des Inneren des Profilschlauches 6 wird die Fläche, wie gestrichelt dargestellt, nach außen durchgebogen und kommt dabei zur Anlage an der Walze 8. Auch hier liegt der Profilschlauch über die ganze Länge der Walze 8 mit gleichmäßigem Andruck an.2, a profile tube 6 is used, which is inserted into a rigid support 7 U-shaped cross section. The surface 9 of the profile tube facing away from the roller 8 to be scraped off is firmly connected by gluing to the carrier 7. The interior of the profile hose 6 can in turn be pressurized with compressed air or pressure relieved. In the pressure-relieved position shown with solid lines, the surface 10 of the profile tube 6 facing the roller 8 to be scraped off is curved inward, so that in this position there is no contact between the surface 10 and the roller 8. By pressurizing the inside of the profile tube 6 with compressed air, the surface is bent outwards, as shown in dashed lines, and comes to rest against the roller 8. Here, too, the profile tube lies against the entire length of the roller 8 with even pressure.

Claims (4)

1. Scraper for a cleaning device for a printing machine, characterised in that parallel to the roller (2, 8) to be scraped there is arranged a shaped tube (1, 6) whose cross-sectional profile can be varied by applying compressed air, and the surface of the shaped tube (1, 6) remote from the roller (2, 8) is secured to a rigid carrier (5, 7), whilst the surface of the shaped tube (1, 6) remote from the carrier can be pressed against the roller by the application of compressed air.
2. Scraper according to claim 1, characterised in that the surface remote from the carrier (5) carries at least one scraper ridge (3) extending parallel to the axis of the roller (2).
3. Scraper according to claim 2, characterised in that the scraper ridge is formed integrally with the shaped tube (1).
4. Scraper according to claim 2, characterised in that the scraper ridge (3) and the shaped tube (1) are made of different materials and are joined firmly together, for example by gluing.
EP84102353A 1983-03-17 1984-03-05 Scraper for a cylinder cleaning device Expired EP0119538B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833309557 DE3309557A1 (en) 1983-03-17 1983-03-17 RAKEL FOR A ROLLER WASHING DEVICE
DE3309557 1983-03-17

Publications (3)

Publication Number Publication Date
EP0119538A2 EP0119538A2 (en) 1984-09-26
EP0119538A3 EP0119538A3 (en) 1986-05-21
EP0119538B1 true EP0119538B1 (en) 1988-03-23

Family

ID=6193740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102353A Expired EP0119538B1 (en) 1983-03-17 1984-03-05 Scraper for a cylinder cleaning device

Country Status (4)

Country Link
US (1) US4537130A (en)
EP (1) EP0119538B1 (en)
JP (1) JPS59178253A (en)
DE (2) DE3309557A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515721A1 (en) * 1995-05-03 1996-11-07 Heidelberger Druckmasch Ag Device for cleaning cylinder surfaces in rotary printing machines

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD228215B1 (en) * 1984-11-08 1989-12-06 Polygraph Leipzig CLAMPING DEVICE FOR PRESSURE AGGREGATORS, IN PARTICULAR WASHING MACHINES FOR PRINTING MACHINES
US4667597A (en) * 1985-01-22 1987-05-26 Wright Norman D Printing press blanket cleaner
EP0466203B1 (en) * 1986-08-02 1994-06-01 Dai Nippon Insatsu Kabushiki Kaisha Cleaning system for a printing press
JP2542204B2 (en) * 1986-12-23 1996-10-09 東洋ゴム工業株式会社 Cleaning blade for electrophotographic copying machine
US4825249A (en) * 1987-03-14 1989-04-25 Ntn-Rulon Industries Co., Ltd. Cleaning blade for use with photoelectronic copying machine
JPS6416657A (en) * 1987-07-10 1989-01-20 Baldwin Nippon Kk Pressure pad in cylinder cleaner for press
CA1282280C (en) * 1987-12-07 1991-04-02 Robert Bowden Prewipe device
US5322015A (en) * 1988-02-08 1994-06-21 Baldwin Technology Corporation Rotating brush cleaner system
US4875412A (en) * 1988-05-20 1989-10-24 Wright Norman D Printing press blanket cleaner
DE3844770C2 (en) * 1988-11-15 1994-05-26 Baldwin Gegenheimer Gmbh Wiper for pressure cylinder of rotary printing machine
US5265537A (en) * 1988-11-17 1993-11-30 Baldwin Technology Corporation Printing press blanket cleaner
US5086701A (en) * 1988-11-17 1992-02-11 Baldwin Technology Corp. Printing press blanket cleaner
DE3909114C2 (en) * 1989-03-20 1994-06-01 Heidelberger Druckmasch Ag Actuator acted upon by pressure medium for placing a washcloth on a washing device of a printing press
US5271326A (en) * 1990-03-05 1993-12-21 Komori Corporation Cylinder cleaning mechanism for a printing press
DE4008159A1 (en) * 1990-03-15 1991-09-19 Heidelberger Druckmasch Ag CLEANING DEVICE FOR A PRINTING MACHINE
US5245925A (en) * 1990-04-19 1993-09-21 Ryco Graphic Manufacturing Inc. Dry brush cleaning apparatus and method for cleaning printing press blanket cylinders
GB2262434A (en) * 1991-12-13 1993-06-23 Ishikawajima Harima Heavy Ind A brush assembly suitable for cleaning irregularly shaped surfaces such as hot metal casting rolls
SE468390B (en) * 1992-01-02 1993-01-11 Trellex Ab TRANSPORT BELT SCRAPING DEVICE AND RELATIVE SCRAP SHEET.
JP2872559B2 (en) * 1993-08-04 1999-03-17 ニッカ株式会社 Crimping pad for cleaning a printing press cylinder and the like, and method of manufacturing the same
DE19605957A1 (en) * 1996-02-17 1997-08-21 Heidelberger Druckmasch Ag Device for cleaning the outer surface of cylinders in rotary printing machines
US5813330A (en) * 1996-06-10 1998-09-29 Stretch Devices, Inc. Adjustable flexibility squeegee with replaceable contact blade
DE19739283C2 (en) * 1997-09-08 2002-10-24 Roland Man Druckmasch Method for achieving the production printing status in a web-fed rotary printing press
DE19937084A1 (en) * 1999-08-06 2001-02-08 Koenig & Bauer Ag Washing appts for a cylinder surface has an inflatable elastic rubber membrane to press the washing cloth against the cylinder surface in a simple and robust system
DE10252595B3 (en) * 2002-11-12 2004-05-06 Metzeler Automotive Profile Systems Gmbh Seal, for a vehicle window or door or roof, has a distorting elastic seal body bonded to an adhesion body of a cellular rubber through co-extrusion, with a durable adhesion to the vehicle component

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US2199469A (en) * 1938-09-29 1940-05-07 Brown & Bigelow Printing press washing device
DE800570C (en) * 1949-08-23 1950-11-16 Ludwig Dipl-Ing Hoffmann Squeegee
US3048872A (en) * 1959-04-07 1962-08-14 Chrysler Corp Windshield wiper
DE1109187B (en) * 1959-06-19 1961-06-22 Maschf Augsburg Nuernberg Ag Squeegee device for rotogravure printing machines
US3548441A (en) * 1969-05-22 1970-12-22 Ford Motor Co Window cleaning system
AT317262B (en) * 1969-12-22 1974-08-26 Mitter & Co Device for applying liquid or pasty media to material webs or the like, in particular doctor blade device for film printing machines
US3871049A (en) * 1970-02-09 1975-03-18 Goodrich Co B F Window wiper assembly
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DE3022955C2 (en) * 1980-06-19 1982-12-16 Jagenberg-Werke AG, 4000 Düsseldorf Device for regulating the application thickness when coating moving material webs
US4458376A (en) * 1982-09-03 1984-07-10 Allied Tube & Conduit Corporation Apparatus for wiping continuously moving strip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515721A1 (en) * 1995-05-03 1996-11-07 Heidelberger Druckmasch Ag Device for cleaning cylinder surfaces in rotary printing machines
DE19515721C2 (en) * 1995-05-03 2000-02-03 Heidelberger Druckmasch Ag Device for cleaning cylinder surfaces in rotary printing machines

Also Published As

Publication number Publication date
US4537130A (en) 1985-08-27
EP0119538A2 (en) 1984-09-26
DE3470014D1 (en) 1988-04-28
JPS59178253A (en) 1984-10-09
EP0119538A3 (en) 1986-05-21
DE3309557A1 (en) 1984-09-27

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