EP0985530B1 - Farbwerk in einer Rotations-Offsetdruckmaschine mit einer Farbauftragswalze zur Verringerung des Pereffektes der Druckfarbe - Google Patents
Farbwerk in einer Rotations-Offsetdruckmaschine mit einer Farbauftragswalze zur Verringerung des Pereffektes der Druckfarbe Download PDFInfo
- Publication number
- EP0985530B1 EP0985530B1 EP99114183A EP99114183A EP0985530B1 EP 0985530 B1 EP0985530 B1 EP 0985530B1 EP 99114183 A EP99114183 A EP 99114183A EP 99114183 A EP99114183 A EP 99114183A EP 0985530 B1 EP0985530 B1 EP 0985530B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- roller
- inking
- shore
- outer layer
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/26—Construction of inking rollers
Definitions
- the present invention relates to an inking unit in a rotary offset printing press with an inking roller according to the preamble of claim 1, by means of which the Pearls of the solids contained in printing inks is reduced.
- Prior art offset printing machines comprise a plate cylinder the surface of which contains the image to be printed. This is in rolling contact with a transfer or blanket cylinder, by means of which the the image contained in the plate cylinder is transferred to the web or the sheet. the Plate cylinder is fed paint, which then transfer to the blanket cylinder and then to the web / sheet becomes.
- the ink supply to the plate cylinder can be varied Way, most often using a color box, i. H. one Device in which an ink fountain roller on a container containing printing ink, the ink fountain. At the interface between the ink fountain base and the ink fountain roller are a number of ink fountain keys, which on the Ink fountain roller to and from this can be moved. The distance one The respective ink zone screw from the ink fountain roller surface determines the thickness the ink transferred to the outside surface of the ink fountain roller. In close proximity to the ink fountain roller is a metering roller beyond the ink fountain keys in the direction of rotation downstream.
- the metering roller leads one of one or more rollers, e.g. B. friction rollers, Lifter rollers, intermediate rollers and inking rollers existing ink roller color to.
- the ink is transferred to the plate cylinder via the inking roller.
- inking rollers have an elastic, relatively soft Outer surface made of an elastomer, the hardness in the range between 22 and 28 Shore A (Durometer) lies.
- the outer surface is also cylindrical and has one uniform outer diameter.
- An offset printing unit is known from EP 406 737 A2, which comprises a blanket cylinder, a plate cylinder and an inking cylinder having a compliant Has desktop. There is a layer of one on the inking cylinder elastic, color-accepting material applied. The hardness of this layer is 60 to 70 shore.
- the present invention relates to a device by which the beading of the in Solids contained in printing inks is reduced. In this way, the The present invention significantly improves the printing quality of a printing press by an even distribution of the ink solids is achieved over the entire printed image. Furthermore, the present invention uses less ink achieved uniform optical density of the printed image.
- one or more are used as inking rollers Rollers used, the outer surface of which is made of an elastomer, which is a Hardness between 60 and 90 Shore A (durometer) or between 50 and 100 Shore A (Durometer).
- the use of such an inking roller ensures one more even paint application on the plate cylinder and thus on the Blanket cylinder and the web to be printed.
- Is more than an inking roller is provided, so is at least the inking roller that the plate cylinder contacted last in the direction of rotation, as an inking roller with a hard one Outer surface made of an elastomer.
- Significantly improved printing results can be achieved, however, if all inking rollers are designed in this way.
- the inking rollers can axially along their length have a convex shape so that the diameter of the hard Surface made of an elastomer is larger in the axial center than at the axial ends, which ensures optimal contact between the inking rollers and the plate cylinder is guaranteed.
- the present invention further relates to a printing machine with which at low Color consumption achieved a high print quality and a uniform optical density can be, since the printing ink by the inking rollers according to the invention is evenly applied to the plate cylinder and thus to achieve a certain print quality less color needs to be applied. Accordingly means the present invention is an improvement over prior art printing presses the technology in which to achieve a certain print quality much more Color must be used.
- Fig. 1 shows a schematic representation of a printing press according to the present invention.
- a web of material W e.g. B. made of paper
- a rubber blanket 12 can be applied to each of the rubber blanket cylinders B U and B L.
- the plate cylinder and the inking unit by means of which the colored image is transferred to the upper blanket cylinder B U , are not shown.
- These components are identical or similar to the components assigned to the lower blanket cylinder B L.
- the ink application rollers F 1 , F 2 , F 3 can be supplied with ink by any known inking unit; 1 shows an inking roller train 1, through which the ink is transferred to the plate cylinder P, which then transfers a color image to the lower blanket cylinder B L.
- a rotating ink fountain roller I adjoins an ink fountain 10 and takes up an ink layer therefrom in a known manner, which then transfers it to a metering roller M.
- the ink layer is transferred to a row of transfer rollers D and then to the friction rollers V, a (vibrating) intermediate roller S and a large transfer roller L.
- the ink is transferred from the friction rollers V to one or more inking rollers F 1 , F 2 , F 3 .
- the inking rollers F 1 , F 2 , F 3 transfer an ink layer to the plate cylinder P, although it is not absolutely necessary to provide three inking rollers, but the number of inking rollers can be chosen as desired.
- the printing press according to the present invention can comprise a dampening unit 2 which is arranged downstream of the blanket cylinder B L in the direction of rotation of the plate cylinder and which can be used for moistening the plate cylinder P.
- a printing plate 11 is arranged in a known manner, which transfers a colored image to the lower blanket cylinder B L , with which the latter then prints on the web W.
- the thickness and the type of the ink layer to be transferred to the plate cylinder P and accordingly the quality of the colored print image on the web W are controlled via the ink application rollers F 1 , F 2 , F 3 .
- FIGS. 2 and 3 show two embodiments of an inking roller F 1 , F 2 or F 3 according to the invention, which have an inner core 30 made of a relatively strong, rigid material such as. B. steel.
- the inner core 30 is preferably hollow to reduce the weight and can have pins 22 at both ends for the rotatable fastening of the inking roller F 1 , F 2 or F 3 .
- Hollow core 30 may include an appropriate cooling mechanism, e.g. B. a coolant channel to avoid overheating of the inking roller F 1 , F 2 or F 3 during production printing.
- At least part of the axial length of the inner core 30 is an outer layer 21 made of an elastomer, e.g. B. Buna® rubber compound or another suitable compressible material.
- the elastomer from which the outer layer 21 is made is relatively hard, ie with a hardness of 50-100 Shore A, preferably between approximately 60 and 90 Shore A (durometer), in particular approximately 80 Shore A (durometer).
- the increased hardness of the outer layer 21 brings improved printing results because it causes a finer and more uniform ink splitting between the plate cylinder P and the inking rollers F 1 , F 2 or F 3 .
- the improved ink splitting leads to an improved deposition of the ink solids on the material web W after the transfer of the ink from the plate cylinder P to the blanket cylinder B L , which results in a high-quality print image with high optical density with less ink consumption than in conventional printing presses.
- the outer layer 21 of the inking roller F1, F2 or F3 Due to the increased hardness of the outer layer 21 of the inking roller F1, F2 or F3 according to the invention, it is stiffer and less flexible than conventional inking rollers, which means that when using a standard inking roller with a uniform outer diameter, there is a change in the contact strip between the inking roller and the plate cylinder.
- the inking roller F 1 , F 2 or F 3 can have a convex shape along its axial length, so that the diameter d 1 at the ends of the outer layer 21 is smaller than the diameter d 2 at the axial center of the outer layer 21
- the degree of the curvature, ie the shape of the curve, which forms the outer diameter of the outer layer 21, can, according to standard beam displacement algorithms or computer models, be dependent on the axial length, the diameter and the materials of the inking rollers F 1 , F 2 and F. 3 can be determined.
- the inking roller with the hard outer layer 21 as the last inking roller in the direction of rotation of the plate cylinder P, i.e. in the position of the inking roller F 3 in FIG. 1, and the other two inking rollers with a usual hardness, e.g. B. in the range of 27-35 Shore A. Improved printing results can be achieved if each of the inking rollers F 1 , F 2 and F 3 has a hard outer layer 21.
- inking roller cooling system (not shown) e.g. B. in the form of coolant channels in the cavity inside the inking rollers F 1 , F 2 or F 3 .
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Printing Plates And Materials Therefor (AREA)
- Rotary Presses (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Cleaning In Electrography (AREA)
Description
- Fig. 1
- eine schematische Vorderansicht eines Farbwalzenzugs einer Offset-Druckmaschine gemäß der vorliegenden Erfindung;
- Fig. 2
- eine Vorderansicht sowie eine Innenansicht einer Farbauftragswalze gemäß einer ersten Ausführungsform der vorliegenden Erfindung;
- Fig. 3
- eine Vorderansicht sowie eine Innenansicht einer Farbauftragswalze gemäß einer zweiten Ausführungsform der vorliegenden Erfindung.
- 1
- Farbwalzenzug
- 2
- Feuchtwerk
- 10
- Farbkasten
- 11
- Druckplatte
- 12
- Gummituch
- 21
- Außenschicht
- 22
- Zapfen
- 30
- innerer Kern
- BL
- unterer Gummituchzylinder
- BU
- oberer Gummituchzylinder
- D
- Übertragungswalze
- F1
- Farbauftragswalze
- F2
- Farbauftragswalze
- F3
- Farbauftragswalze
- I
- Farbkastenwalze
- L
- große Übertragungswalze
- M
- Dosierwalze
- P
- Plattenzylinder
- S
- Schwingwalze
- V
- Reiberwalze
- W
- Materialbahn
Claims (7)
- Farbwerk in einer Rotations-Offsetdruckmaschine mit wenigstens einer Farbauftragswalze (F1, F2, F3), die an einem Plattenzylinder (P) angeordnet ist, wobei die Farbwalze (F1, F2, F3) einen inneren Kern (30) und eine Außenschicht (21) aufweist,
dadurch gekennzeichnet daß eine Vielzahl von Farbauftragswalzen (F1, F2, F3) am Umfang des Plattenzylinders (P) vorgesehen ist, wobei die in Umfangsdrehrichtung des Plattenzylinders (P) als letzte angeordnete Farbauftragswalze (F3) eine Außenschicht (21) mit einer Härte im Bereich zwischen 50 Shore A und 100 Shore A aufweist. - Farbwerk nach Anspruch 1,
dadurch gekennzeichnet, daß die Härte der Außenschicht (21) ca. zwischen 60 Shore A und 90 Shore A, insbesondere ca. 80 Shore A, beträgt. - Farbwerk nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Außenoberfläche der Außenschicht (21) entlang der axialen Länge der Außenschicht (21) eine konvexe Form aufweist. - Farbwerk nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Außenschicht (21) ein Elastomer, z. B. Gummi, enthält. - Farbwerk nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Farbauftragswalzen (F1, F2,) die in Umfangsdrehrichtung des Plattenzylinders (P) vor der letzten Farbauftragswalze (F3) angeordnet sind eine Außenschicht (21) aufweisen, die eine geringere Härte, im Bereich zwischen 20 Shore A und 40 Shore A, insbesondere im Bereich von 27 bis 35 Shore A aufweisen. - Farbwerk nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Farbauftragswalzen (F1, F2,) die in Umfangsdrehrichtung des Plattenzylinders (P) vor der letzten Farbauftragswalze (F3) angeordnet sind eine Außenschicht (21) aufweisen, die eine Härte im Bereich zwischen 50 und 100 Shore A aufweisen. - Druckmaschine mit einem Farbwerk nach einem der vorhergehenden Ansprüche.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/131,564 US6098540A (en) | 1998-08-10 | 1998-08-10 | Apparatus and method for reducing mottling in printing presses |
US131564 | 1998-08-10 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0985530A2 EP0985530A2 (de) | 2000-03-15 |
EP0985530A3 EP0985530A3 (de) | 2000-10-04 |
EP0985530B1 true EP0985530B1 (de) | 2003-09-24 |
EP0985530B2 EP0985530B2 (de) | 2009-01-14 |
Family
ID=22450006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99114183A Expired - Lifetime EP0985530B2 (de) | 1998-08-10 | 1999-07-22 | Farbwerk in einer Rotations-Offsetdruckmaschine mit einer Farbauftragswalze zur Verringerung des Pereffektes der Druckfarbe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6098540A (de) |
EP (1) | EP0985530B2 (de) |
JP (1) | JP2000052625A (de) |
CN (1) | CN1131780C (de) |
DE (2) | DE59907097D1 (de) |
HK (1) | HK1023095A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911180C2 (de) * | 1999-03-12 | 2001-02-01 | Koenig & Bauer Ag | Druckwerk für eine Rotationsdruckmaschine |
US7055428B2 (en) * | 2002-04-11 | 2006-06-06 | Koenig & Bauer Aktiengesellschaft | Characterization, determination of a characteristic number and selection of suitable dressings on cylinders of a printing press |
WO2005118293A1 (en) * | 2004-05-21 | 2005-12-15 | Demaxz, L.L.C. | Apparatus for printing on substrates of timber or synthetic material |
CN1939721B (zh) * | 2005-09-27 | 2010-12-15 | 海德堡印刷机械股份公司 | 用于对印刷机调节温度的方法 |
DE102006015481B4 (de) | 2006-01-04 | 2009-07-09 | Koenig & Bauer Aktiengesellschaft | Walze einer Druckmaschine |
DE102006011477B4 (de) * | 2006-03-13 | 2007-12-27 | Koenig & Bauer Aktiengesellschaft | Druckwerk mit einem geteilten Formzylinder |
CN101045367A (zh) * | 2006-03-28 | 2007-10-03 | 海德堡印刷机械股份公司 | 网纹辊印刷装置 |
DE102006015490B4 (de) * | 2006-04-03 | 2009-11-12 | Koenig & Bauer Aktiengesellschaft | Rollendruckmaschine mit einem Filmfarbwerk |
DE102006015482B4 (de) * | 2006-04-03 | 2010-06-24 | Koenig & Bauer Aktiengesellschaft | Walze einer Druckmaschine |
DE102006046521A1 (de) * | 2006-09-29 | 2008-04-03 | Man Roland Druckmaschinen Ag | Druckwerk einer Druckmaschine |
US8726807B2 (en) * | 2007-06-04 | 2014-05-20 | Goss International Americas, Inc. | Smooth roller with low line load and methods |
US20120279407A1 (en) * | 2011-05-06 | 2012-11-08 | Phoenix Machinery | Paper coater apparatus and process |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH355786A (de) * | 1958-01-24 | 1961-07-31 | Winkler Fallert & Co Maschf | Maschine zum Bedrucken von Papier und andern Stoffen in Bahnen mittels Tiefdruckwalzen |
DE6910823U (de) * | 1969-03-17 | 1969-07-03 | Maschf Augsburg Nuernberg Ag | Filmwalze oder dgl. fuer farbwerke von rotationsdruckmaschinen |
US3828674A (en) * | 1972-03-01 | 1974-08-13 | Houston Chronicle Publishing C | Printing press ink suppression apparatus |
JPS5549295A (en) * | 1978-10-05 | 1980-04-09 | Toray Ind Inc | Ink roller for dry lithographic printing |
DE3705194A1 (de) * | 1987-02-19 | 1988-09-01 | Frankenthal Ag Albert | Farbwerk |
WO1989005732A1 (en) * | 1987-12-21 | 1989-06-29 | Kinyosha Co., Ltd | Ink roller for printing press and production thereof |
DE8908243U1 (de) * | 1989-07-06 | 1989-08-17 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De | |
WO1991013761A1 (de) † | 1990-03-03 | 1991-09-19 | Albert-Frankenthal Aktiengesellschaft | Kurzfarbwerk für eine rollenrotationsdruckmaschine |
JPH0422980A (ja) * | 1990-05-18 | 1992-01-27 | Canon Inc | 画像形成装置 |
DE4103742C2 (de) * | 1991-02-07 | 1994-07-14 | Roland Man Druckmasch | Einstellbare Feuchtwerks- oder Farbwerkswalze |
US5816150A (en) * | 1993-02-24 | 1998-10-06 | Sarda; Jean Lucien | Dampening units of offset printing presses |
DE9310713U1 (de) * | 1993-07-17 | 1993-09-02 | Roland Man Druckmasch | Farbauftragwalze |
DE4436973C2 (de) † | 1993-12-21 | 2003-06-26 | Heidelberger Druckmasch Ag | Gummituch mit variierendem Profil und Verfahren zu seiner Herstellung |
JP2951542B2 (ja) * | 1994-06-30 | 1999-09-20 | 日本ボールドウィン株式会社 | 冷却装置を有するローラ |
DE29612105U1 (de) * | 1996-07-11 | 1996-08-22 | Roland Man Druckmasch | Walze in einer Druckmaschine |
-
1998
- 1998-08-10 US US09/131,564 patent/US6098540A/en not_active Expired - Lifetime
-
1999
- 1999-07-22 DE DE59907097T patent/DE59907097D1/de not_active Expired - Lifetime
- 1999-07-22 DE DE19934395A patent/DE19934395B4/de not_active Expired - Fee Related
- 1999-07-22 EP EP99114183A patent/EP0985530B2/de not_active Expired - Lifetime
- 1999-07-26 CN CN99111013A patent/CN1131780C/zh not_active Expired - Fee Related
- 1999-08-09 JP JP11225255A patent/JP2000052625A/ja active Pending
-
2000
- 2000-04-05 HK HK00102047A patent/HK1023095A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0985530A2 (de) | 2000-03-15 |
CN1131780C (zh) | 2003-12-24 |
DE19934395B4 (de) | 2012-11-08 |
CN1244462A (zh) | 2000-02-16 |
JP2000052625A (ja) | 2000-02-22 |
DE19934395A1 (de) | 2000-02-17 |
US6098540A (en) | 2000-08-08 |
EP0985530A3 (de) | 2000-10-04 |
EP0985530B2 (de) | 2009-01-14 |
HK1023095A1 (en) | 2000-09-01 |
DE59907097D1 (de) | 2003-10-30 |
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