EP0949074A1 - Joint pour chambre de racle - Google Patents

Joint pour chambre de racle Download PDF

Info

Publication number
EP0949074A1
EP0949074A1 EP98101431A EP98101431A EP0949074A1 EP 0949074 A1 EP0949074 A1 EP 0949074A1 EP 98101431 A EP98101431 A EP 98101431A EP 98101431 A EP98101431 A EP 98101431A EP 0949074 A1 EP0949074 A1 EP 0949074A1
Authority
EP
European Patent Office
Prior art keywords
strip
doctor blade
doctor
chamber
seal
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
EP98101431A
Other languages
German (de)
English (en)
Other versions
EP0949074B1 (fr
Inventor
Michael Schmitt
Lars Grüter
Wilfried Dr. Kolbe
Klaus Schirrich
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.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
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 Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to EP98101431A priority Critical patent/EP0949074B1/fr
Priority to DE59800788T priority patent/DE59800788D1/de
Priority to US09/215,972 priority patent/US6016748A/en
Priority to JP11015356A priority patent/JPH11254650A/ja
Publication of EP0949074A1 publication Critical patent/EP0949074A1/fr
Application granted granted Critical
Publication of EP0949074B1 publication Critical patent/EP0949074B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a seal for a chambered doctor blade of a printing machine.
  • Printing machines for example flexographic printing machines, have an application roller on that for applying the printing ink to the actual printing cylinder serves and which in turn is colored with the help of a doctor blade.
  • the chambered doctor blade has a housing that extends over the entire length of the Application roller extends, and carries at least two doctor blades that cover the perimeter scrape off the rotating applicator roller and together with the housing the chamber doctor blade and the one between the doctor blades Limit an ink chamber circumferential surface of the application roller.
  • the application roller usually has a regular grid of flat ones on its surface Wells that are filled with printing ink when the relevant one Circumferential portion of the applicator roller moved through the ink chamber, and the then deliver the printing ink so recorded to the printing cylinder.
  • the seals that form the subject of the following invention serve to close the ink chamber at the ends.
  • Conventional seals of this type have a block of flexible Material, for example made of felt, between the two doctor blades is inserted into the chamber of the chamber doctor blade and close to the two doctor blades and on the intermediate portion of the surface of the Application roller is applied.
  • the flexibility of the sealing block enables a good seal on the circumference of the application roller and allows an increasing stronger positioning of the doctor blade on the applicator roller accordingly the progressive wear of the doctor blades.
  • the material of the sealing block must be meet various requirements that have so far not been satisfactory to bring them into harmony. On the one hand, it must be a reliable one and ensure permanent sealing of the ink chamber, on the other hand, should in terms of the frictional contact between the sealing block and the rotating applicator roller have the highest possible abrasion resistance, so that the sealing block does not work off too quickly. About that In addition, the material must be compared to the printing inks and Solvents are chemically and mechanically resistant. The liquids that can come into contact with the surface of the sealing block on the one hand lead to swelling and softening of the material and can, on the other hand, after drying the liquid to a Cause embrittlement of the material. In both cases, there is ultimately one increased wear on the sealing blocks.
  • the object of the invention is to provide a seal for the chamber doctor blade To create printing machine that has a higher wear resistance and a permanent and reliable seal of the ink chamber enables.
  • This object is achieved in that the application roller facing surface of the sealing block with a strip elastic material is covered, which is harder than the material of the sealing block.
  • This strip prevents direct contact between the compliant Material of the sealing block and the surface of the application roller.
  • the application roller is only with the strip of relatively hard material in rubbing contact, which has a high abrasion resistance. Because this streak on the other hand, however, is elastic and due to the resilient material of the Sealing block evenly against the circumference of the application roller is pressed, a reliable seal can still be achieved.
  • the material of the actual sealing block can be regardless of the Abrasion resistance in terms of chemical resistance and in terms of be optimized for its hardness.
  • For the covering strip can any sufficiently hard and elastic material, e.g. metal, used compared to printing inks and solvents is stable. The necessary resilience can then be determined by suitable ones Select the thickness of this strip easily.
  • the covering strip can be glued, vulcanized or the like be attached directly to the sealing block.
  • The is preferred However, strips detachably on the doctor blade or the housing of the chamber doctor attached.
  • the elastic strip simply with its rear end in the direction of rotation of the application roller into one formed between the doctor blade and the housing of the chamber doctor Pocket inserted while the opposite end of the strip is loose is. Since the frictional forces between the application roller and the strip in Direction towards the attached end of the strip that is inserted into the pocket the strip is not pulled out of the pocket.
  • the opposite free end of the strip can either be under the other doctor knife concern or between the doctor blade and the scope of the Applicator roller to be guided outside.
  • the doctor blade 12 has Housing 14 on which in a known manner, for example with the help of shown clamping devices, two roof-shaped doctor blades 16, 18 are attached, with their free ends on the circumference of the applicator roller 10 concerns.
  • the two doctor blades 16, 18 and the section of the Circumferential surface of the application roller 10 is limited to an ink chamber 20 extends over the entire length of the application roller 10 and at both ends is completed by seals 22.
  • FIG 2 one end of the applicator roller 10 and the chamber doctor blade 12 with the corresponding seal 22 shown.
  • the application roller 10 has one Middle section 24 and a narrow end section 26 at each end.
  • the peripheral surface of the applicator roller is one Cup grid made of flat cups 28, while the End portions 26 against which the seals 22 abut a smooth Have surface.
  • the ink chamber 20 is filled with printing ink filled, and the application roller 10 rotates clockwise in Figure 1.
  • the peripheral surface of the applicator roller 10 wetted in the middle section 24 with printing ink.
  • excess ink is stripped off again, so that only a certain amount of ink in the Cup 28 remains, which then to a pressure cylinder, not shown is handed over.
  • the seal 22 has a seal block 30 made of resilient material on, for example made of felt or one compared to printing inks and Solvent resistant soft, rubbery porous or not porous material.
  • the sealing block 30 is in a groove 32 of the housing 14 held and forms one to the doctor blade 16, 18 and between them included circumferential section of the applicator roller 10 adapted contour, so that it completely closes the ink chamber 20 at the end.
  • the sealing block 30, however, is not directly on the circumference of the application roller 10 on, but it is through on its surface facing the applicator roller covered a thin, elastic strip 34 of metal, the width of which is greater than that of the sealing block 30.
  • This strip 34 is by the compliant material of the sealing block 30 in full contact with the applicator roller 10 held and stands with the smooth end portion 26 of the applicator roller in sliding contact. In this way it becomes excessive Wear of the sealing block 30 avoided without the sealing effect is affected.
  • the strip 34 is with its in the direction of rotation Applicator roller 10 attached to the chambered doctor blade 12 at the rear end.
  • the purpose is to end the strip 34 in a between the doctor blade 16 (left in Figure 1) and the housing 14 formed pocket 36 inserted.
  • the acting between the applicator roller 10 and the strip 34 Frictional forces tend to counter this streak to the left in Figure 1 to press the doctor blade 16 and the bottom of the pocket 36 so that stable attachment of the strip 34 is achieved in a simple manner.
  • the strip 34 is bent relatively sharply or angled so that there is no leak.
  • the opposite The end of the strip 34 is also angled or bent and at the embodiment of Figure 1 loosely inserted under the doctor blade 18.
  • FIG. 3 shows a modified embodiment in which the strip 34 with its rear end in any suitable manner on the doctor blade 16 is attached while the front end between the edge of the doctor knife 18 and the scope of the applicator roller 10 emerges and freely from the Farmer chamber 20 protrudes.
  • the end portion of the doctor blade 18 m ⁇ ß covered by the strip 34 necessarily form a gap with the circumference of the application roller 10, whose width corresponds to the material thickness of the strip 34.
  • the doctor blade 18 against wear protected, so that wear of the doctor blade essentially only in the length range that occurs at the central portion 24 of the applicator roller is present. This different wear of the doctor blade can also be compensated for by elastic yielding of the doctor blade.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Coating Apparatus (AREA)
EP98101431A 1998-01-28 1998-01-28 Joint pour chambre de racle Expired - Lifetime EP0949074B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98101431A EP0949074B1 (fr) 1998-01-28 1998-01-28 Joint pour chambre de racle
DE59800788T DE59800788D1 (de) 1998-01-28 1998-01-28 Dichtung für Kammerrakel
US09/215,972 US6016748A (en) 1998-01-28 1998-12-18 Seal for a chamber doctor blade
JP11015356A JPH11254650A (ja) 1998-01-28 1999-01-25 チャンバ用ドクタ―ブレ―ド装置のためのシ―ル装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98101431A EP0949074B1 (fr) 1998-01-28 1998-01-28 Joint pour chambre de racle

Publications (2)

Publication Number Publication Date
EP0949074A1 true EP0949074A1 (fr) 1999-10-13
EP0949074B1 EP0949074B1 (fr) 2001-05-30

Family

ID=8231316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101431A Expired - Lifetime EP0949074B1 (fr) 1998-01-28 1998-01-28 Joint pour chambre de racle

Country Status (4)

Country Link
US (1) US6016748A (fr)
EP (1) EP0949074B1 (fr)
JP (1) JPH11254650A (fr)
DE (1) DE59800788D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2216725A1 (es) * 2004-04-20 2004-10-16 Comexi, Sa Dispositivo de rasqueta para un grupo entintador de una impresora flexografica.
DE202009013643U1 (de) 2009-10-26 2011-03-17 Zeljko, Kitic Dichtelement
EP2821228A1 (fr) * 2013-06-27 2015-01-07 Heidelberger Druckmaschinen AG Joint pour systèmes de racle

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29903308U1 (de) * 1999-02-24 1999-09-30 Nordson Corp., Westlake, Ohio Rad-Auftragsvorrichtung
FR2792249B1 (fr) * 1999-04-19 2001-06-22 Fort James France Dispositif d'etancheite d'extremite pour chambre a racle
DE10047394A1 (de) * 1999-10-15 2001-04-19 Heidelberger Druckmasch Ag Modulares Druckmaschinensystem zum Bedrucken von Bogen
EP1683633B1 (fr) * 2005-01-24 2011-09-21 Gallus Ferd. Rüesch AG Unité d'impression en creux pour imprimer sur bande dans une machine d'impression
US20070261577A1 (en) * 2006-04-26 2007-11-15 Burrow William J Printing roll with dead band helical pattern
US7597761B2 (en) * 2006-08-10 2009-10-06 Van Denend Mark E Sealing assembly for an ink chamber which includes self-lubricating anilox roll seal with improved blade/seal area
DK176626B1 (da) * 2007-08-21 2008-12-01 Tresu Anlaeg As Pakning til kammerrakel
US20090193990A1 (en) * 2008-02-06 2009-08-06 Van Denend Mark E Seal for an Ink Chamber with Improved Blade/Seal Area
DE102008042263B4 (de) * 2008-09-22 2011-01-27 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Aufbringen von Druckfarbe
US8474378B1 (en) 2010-02-23 2013-07-02 Valley Holdings, Llc Chamber blade/sealing assembly for a printing press
EP2930025B1 (fr) 2014-04-11 2018-05-30 wiguTec Gummitechnologie GmbH & Co. KG Élément d'étanchéité
DE202014101740U1 (de) 2014-04-11 2015-07-14 Wigutec Gummitechnologie Gmbh & Co. Kg Dichtungselement
JP6344810B1 (ja) * 2018-02-13 2018-06-20 下村　恭一 グラビア印刷方法およびそれに用いるスキージー

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438731A2 (fr) * 1990-01-22 1991-07-31 WindmÀ¶ller & Hölscher Dispositif de raclage pour l'encrier à circulation d'encre d'une presse À  imprimer rotative
DE4302671A1 (de) * 1993-01-30 1994-08-18 Roland Man Druckmasch Kurzfarbwerk
GB2278315A (en) * 1993-05-27 1994-11-30 Roland Man Druckmasch Chambered doctor blade
GB2315460A (en) * 1996-07-20 1998-02-04 James Peter Fowden Applying liquid to coating roller:seals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887049A (en) * 1955-12-29 1959-05-19 Harris Intertype Corp Ink fountain
US4821672A (en) * 1987-06-22 1989-04-18 Nick Bruno Doctor blade assembly with rotary end seals and interchangeable heads
US5103732A (en) * 1991-02-14 1992-04-14 Ward Holding Company, Inc. Doctor blade head assembly and printing apparatus therewith
DE4315595C2 (de) * 1993-05-11 1995-02-16 Roland Man Druckmasch Einsatz für Keilfarbkästen von Druckmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438731A2 (fr) * 1990-01-22 1991-07-31 WindmÀ¶ller & Hölscher Dispositif de raclage pour l'encrier à circulation d'encre d'une presse À  imprimer rotative
DE4302671A1 (de) * 1993-01-30 1994-08-18 Roland Man Druckmasch Kurzfarbwerk
GB2278315A (en) * 1993-05-27 1994-11-30 Roland Man Druckmasch Chambered doctor blade
GB2315460A (en) * 1996-07-20 1998-02-04 James Peter Fowden Applying liquid to coating roller:seals

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2216725A1 (es) * 2004-04-20 2004-10-16 Comexi, Sa Dispositivo de rasqueta para un grupo entintador de una impresora flexografica.
WO2005101952A2 (fr) * 2004-04-20 2005-11-03 Comexi, Sa Racloir pour ensemble d'encrage d'imprimante flexographique
WO2005101952A3 (fr) * 2004-04-20 2005-12-01 Comexi Sa Racloir pour ensemble d'encrage d'imprimante flexographique
DE202009013643U1 (de) 2009-10-26 2011-03-17 Zeljko, Kitic Dichtelement
EP2821228A1 (fr) * 2013-06-27 2015-01-07 Heidelberger Druckmaschinen AG Joint pour systèmes de racle
US9272503B2 (en) 2013-06-27 2016-03-01 Heidelberger Druckmaschinen Ag Seal for doctor blade devices and doctor blade device having a seal

Also Published As

Publication number Publication date
US6016748A (en) 2000-01-25
DE59800788D1 (de) 2001-07-05
JPH11254650A (ja) 1999-09-21
EP0949074B1 (fr) 2001-05-30

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