EP0941847A1 - Dispositif et procédé de dosage de l'encre dans des machines à imprimer offset - Google Patents

Dispositif et procédé de dosage de l'encre dans des machines à imprimer offset Download PDF

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Publication number
EP0941847A1
EP0941847A1 EP99101505A EP99101505A EP0941847A1 EP 0941847 A1 EP0941847 A1 EP 0941847A1 EP 99101505 A EP99101505 A EP 99101505A EP 99101505 A EP99101505 A EP 99101505A EP 0941847 A1 EP0941847 A1 EP 0941847A1
Authority
EP
European Patent Office
Prior art keywords
ink
roller
color
control
inking roller
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
EP99101505A
Other languages
German (de)
English (en)
Other versions
EP0941847B1 (fr
Inventor
Edward Ellis Urguhart
James Brian Vrotacoe
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 EP0941847A1 publication Critical patent/EP0941847A1/fr
Application granted granted Critical
Publication of EP0941847B1 publication Critical patent/EP0941847B1/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
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles
    • 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
    • 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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B41F31/045—Remote control of the duct keys

Definitions

  • the present invention relates to a device and a method for dosing of color in an offset press.
  • Offset presses are well known in printing technology.
  • a Offset printing machine rotates an image or plate cylinder on its Outer circumference carries an image to be printed, either in contact with the printing paper or preferably in contact with a transfer or Blanket cylinder that transfers the print image from the image cylinder to the paper. It So color is applied to the image cylinder, either directly on the paper or is first transferred to the transfer cylinder and then to the paper.
  • a color box is one Device in which an ink fountain roller on a container filled with ink is stored. In the space between the bottom of the container (i.e. the paint box) and The ink fountain roller has a number of ink fountain keys.
  • the Ink fountain keys can move towards and away from the ink fountain roller and the distance between the end of each ink fountain key and the The surface of the ink fountain roller determines the thickness of the ink by the Ink zone screw is applied to the outer surface of the ink fountain roller.
  • the Ink fountain roller is close to a metering roller that is in an area behind the ink zone screws is arranged in the direction of rotation of the ink fountain roller.
  • the metering rollers used with conventional ink fountains usually have one spiral groove on their outer surfaces. This spiral groove is used to Remove impurities from the metering roller. The contaminants get into the spiral groove and are at the end of the metering roller due to the spiral Course of the groove in cooperation with the rotary movement of the metering roller eliminated. Because the impurities remain in the spiral groove, if they are not transferred to any downstream rollers, the remains Image cylinder free from contamination. However, this spiral groove caused in the metering roller has a corrugated pattern in the ink film, d. H. there are different thicknesses the ink film on the metering roller.
  • the corrugated pattern of the ink film on the metering roller must first be smoothed before the color film is transferred to the image cylinder becomes.
  • Ink film smoothing rollers usually eleven to fifteen rollers
  • the color is from the Transfer metering roller to a number of smoothing rollers one by one before moving is transferred to the image cylinder. Every single step of the color transfer from one smoothing roller to the next also smoothes the corrugated pattern of the Dosing roller transferred ink film.
  • the knowledge is therefore obvious that Requires a large number of smoothing rollers for the complexity of the Printing machine contributes and increases manufacturing costs.
  • Cry " that is, ink drops accumulate at the interface between ink fountain key and ink fountain roller. These ink drops can get on the press components and into the inking unit and change the printed image or the ratio of the colors fed to the image cylinder Accumulate ink fountain keys and the ink fountain roller, which in turn can change the condition of the ink or rollers, which can affect print quality.
  • Stenciling "and Underdosing " Stenciling or underdosing is caused by excess ink on the image or plate cylinder that is not transferred to the paper in areas where no image can be printed. This excess ink, or vice versa, the lack of Color due to the removal of color for the printing of the image can result in fluctuations in the color film thickness on the image cylinder during further printing and thus adversely affect the quality of the printed image.
  • a second device for distributing or rubbing color on an image cylinder is the lifting roller.
  • This roller is not in constant contact with the Ink fountain roller held. Rather, the lifter roller moves between the Ink fountain roller and the image cylinder back and forth.
  • the lifter roller Ink fountain roller contacted so it rotates at the speed of Ink fountain roller; however, when the jack roller contacts the image cylinder, it rotates yourself with the speed of the printing press. It is therefore easy to understand that the Mechanism used to drive the jack roller is necessarily complicated and is expensive.
  • the present invention provides a paint metering device and method with which the problems of the conventional devices for dosing the on Color cylinder to be applied can be eliminated.
  • Device is passed under pressure through an orifice.
  • the pressure of Paint can be obtained either with a paint pump or by feeding it down a slope become.
  • the size of the orifice can be given in the press Conditions, e.g. B. the properties of the color to be used, the temperature, etc. can be varied accordingly.
  • the pressure with which the ink is supplied can also varies according to the conditions in the printing press become.
  • the ink coming from the outflow opening is fed to an inking roller.
  • a paint control squeegee on the outer surface of the Ink roller placed below the outflow opening.
  • the distance between the tip of the color control squeegee and the outer surface of the inking roller can be varied.
  • the thickness of the on the The surface of the inking roller generated ink film is determined by the distance between the tip of the ink control blade and the outer surface of the inking roller and / or by the amount of ink fed through the orifice of the inking roller (which is due to the size of the orifice and / or the pressure of the paint upstream the opening is regulated) controlled.
  • the ink control squeegee also smoothes the ink film that directly on the image or plate cylinder placed on the inking roller is transmitted.
  • the ink control doctor blade is preferably flexible and can be constructed in this way be that its flexibility can be varied.
  • the ink control squeegee can do straight be flexible enough so that it only smoothes the ink on the inking roller and not dosed and thus the thickness of the color film only by the size of the outflow opening and / or controlled by the printing of the color.
  • the area between the ink control blade, the surface of the inking roller and the outflow opening forms a gap in which a meniscus of color is just behind the color control squeegee.
  • the speed of the inking roller together control the ink flow in and out of the gap.
  • the speed of the inking roller is with the Identical or plate cylinder speed identical.
  • the movement of the Ink control squeegees and the flow of the meniscus of ink ensure that the ink film on the inking roller is smooth and that also on the image or plate cylinder applied color film is smooth.
  • the presence of a meniscus of color behind the Ink control doctor blade of the ink metering device of the present invention prevents one Underdosing, d. H. that no ink is transferred to the inking roller at all and the ink control squeegee prevents stenciling, i.e. H. that excess paint is transferred to the inking roller.
  • stenciling i.e. H. that excess paint is transferred to the inking roller.
  • the color is determined by the Ink control doctor blade sheared off instead of splitting the ink by tension like this in a prior art inking unit is used to produce a color film.
  • the ink film is being applied to the inking roller, smoothed and it can take a long train of smoothing rollers or friction rollers to be dispensed with.
  • the present invention also addresses the problems of stenciling or Fixed underdosing by adding the remaining color film from the image or Plate cylinder flows back, is eliminated, preventing residual ink affects a subsequently produced color film.
  • Fig. 1 shows a schematic, partially shown in cross section elevation of a Embodiment of the present invention.
  • a colored printing image is transferred from an image cylinder 1 either directly to paper, ie onto paper sheets or onto a paper web, or preferably onto a transfer or blanket cylinder (not shown), the latter in turn transferring the colored printing image onto paper transmits.
  • the manner in which an image cylinder 1 transfers the inked print image to paper is well known and will not be described further here.
  • the image cylinder 1 rotates in a direction D 1 .
  • An inking roller 2 rotates with the image cylinder 1, the inking roller 2 rotating in a direction D 2 .
  • An ink film 3 is transferred from the inking roller 2 to the image cylinder 1.
  • An ink film applicator 4 is preferably attached to a side frame, not shown, of the printing press and comprises an ink source with ink kept under pressure.
  • the ink source 5 can be a bore or a reservoir in the ink film application device 4, which, for. B. is fed by a paint pump or gravity with a gradient. It should be understood that the pressure with which the color is fed into the color source 5 depends on the specific conditions of the color application, e.g. B. may vary depending on the characteristic properties of the color, temperature, etc.
  • a paint channel 6 extends from the paint source 5 to an outflow opening through which the paint is supplied.
  • the size of the outflow opening 7 can be adjusted.
  • a section 8 of the ink film application device 4, which determines the ink channel 6, has a certain flexibility and is in contact with a cam disk 14. This flexibility is provided by cuts or thinned parts (not shown) between the section 8 and the main part of the ink film applicator 4. In the drawing, a mechanism for bending section 8 is shown. With the bending of the section 8, the size of the outflow opening 7 is also changed.
  • the ink film applicator 4 comprises a bracket 12 with a bolt or shaft 13 at one end.
  • a cam 14 is in contact with the portion 8 of the ink film applicator 4 which controls the size of the drain opening, and the cam 14 rotates about an eccentrically attached bolt or shaft 15.
  • a linkage 16 is connected to and rotates the cam 14 around the eccentrically mounted bolt or shaft 15.
  • the linkage 16 thus moves in a direction P 1 and thereby moves the cam disk 14 in a direction R, as a result of which the section 8 of the ink film application device 4 moves towards or away from the main part of the ink film application device 4 and thereby the size of the Outflow opening 7 is reduced or enlarged.
  • the paint flows down under pressure through the paint channel and passes through the Outflow opening 7 on the outer surface of the inking roller 2.
  • the on the surface the ink application roller 2 is thus applied by the pressure of the Color in the color source 5 and controlled by the size of the outflow opening 7.
  • the ink control blade 9 which can be flexible and preferably on the Color film applicator 4 is attached.
  • the ink control blade 9 has one Tip 10, which through a gap G from the outer surface of the inking roller 2nd is spaced.
  • the size of this gap G can be the thickness of the color film on the Control inking roller 2, which is transferred to the image cylinder 1, if that Ink control squeegee 9 has the appropriate rigidity.
  • the size of the gap G and thus the thickness of the color film 3 can be changed by changing the Position of the ink control blade 9 can be varied.
  • the ink control blade 9 is in a groove 22 adjustable; thereby changing the position of the ink control blade 9 relative to Ink roller 2 allows. With an adjusting screw (not shown) this can be done Ink control squeegee 9 can be fixed in this position after adjusting its position.
  • the stiffness of the flexible ink control blade 9 can also be varied by its position in the groove 22 is changed.
  • the ink control doctor blade 9 be made sufficiently flexible so that it only smoothes the ink film 3 (i.e.
  • the dosage of the to be applied to the inking roller 2 Color i.e., the thickness of the color film
  • the Color only by the size of the outlet opening 7 and the pressure of the color in the Color source 5 dosed.
  • the process of the present invention has the following sequence:
  • the color is e.g. B. by means of a paint pump or by gravity on a slope (not shown) under pressure into the paint source 5.
  • the paint flows down the paint channel 6 and out of the outflow opening 7.
  • the size of the outflow opening 7 can be regulated by activating the motor 17, the linkage 16, the cam disk 14 and the section 8; and the pressure at which the paint is supplied to the paint source can be controlled by controlling the paint pump or gravity over a slope in any known manner.
  • the position and / or the rigidity of the ink control blade 9 can be regulated by changing the position of the flexible ink control blade 9 in the groove 22 and then the ink control blade 9 by known mechanisms, such as. B. Set screws (not shown) is attached in this position.
  • the ink flowing through the outflow opening 7 is applied to the outer surface of the inking roller 2, which moves in the direction D 2 , the ink flowing in the direction of the flexible ink control blade 9.
  • the existence of meniscus 11 and gap G formed by the ink control doctor blade 9 ensure a constantly smooth and even color film.
  • a stenciling - that by remaining color 20 on the inking roller is created - or an underdosing - by the non-inked Areas on the inking roller 2 arises - prevented.
  • the color film 3 on the Ink application roller 2 is transferred directly to the image cylinder 1 because these rollers are hired together. From the color film 3 on the image cylinder 1 is a Print image generated either directly or via a transfer cylinder (not shown) on paper (not shown).
  • the thickness of the color film 3 can be changed at any time by changing the size of the gap G or the amount of the color flowing out of the outflow port 7.
  • the motor 17 is activated, which rotates the guide screw 18 either clockwise or counterclockwise.
  • the rotation of the guide screw 18 in operative connection with the threaded bore 19 causes the linkage 16 to pivot in the direction P 1 , which in turn causes the cam disk 14 to rotate in the R direction.
  • the rotation of the cam disk 14 in the direction R causes the section 8 of the ink film applicator 4 to move toward or away from the main part of the ink film applicator 4, which in turn changes the size of the orifice 7.
  • the amount of ink flowing onto the inking roller 2 can be varied.
  • the amount of ink flow can also be varied by changing the pressure of the color in the ink source 5.
  • the size of the gap G can be varied by regulating the position of the ink control blade 9 in the groove 22.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP99101505A 1998-03-13 1999-01-27 Dispositif et procédé de dosage de l'encre dans des machines à imprimer offset Expired - Lifetime EP0941847B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3901198A 1998-03-13 1998-03-13
US39011 1998-03-13
US140928 1998-08-27
US09/140,928 US6076463A (en) 1998-03-13 1998-08-27 Ink metering device and method of metering ink

Publications (2)

Publication Number Publication Date
EP0941847A1 true EP0941847A1 (fr) 1999-09-15
EP0941847B1 EP0941847B1 (fr) 2002-12-18

Family

ID=26715728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101505A Expired - Lifetime EP0941847B1 (fr) 1998-03-13 1999-01-27 Dispositif et procédé de dosage de l'encre dans des machines à imprimer offset

Country Status (4)

Country Link
US (1) US6076463A (fr)
EP (1) EP0941847B1 (fr)
JP (1) JPH11291460A (fr)
DE (2) DE59903796D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527148A3 (fr) * 2011-05-25 2013-01-23 Heidelberger Druckmaschinen AG Procédé d'impression et élément d'impression offset
WO2014159780A2 (fr) 2013-03-13 2014-10-02 Probity Engineering, Llc Appareil encreur et procédé de réglage du débit d'encre pour appareil de flexographie

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29921450U1 (de) 1999-12-08 2000-10-05 Planatol Klebetechnik GmbH, 83101 Rohrdorf Farbbalken für Farbkästen in Druckmaschinen
DE10020512A1 (de) * 2000-04-26 2001-11-15 Roland Man Druckmasch Dosiersystem für eine Beschichtungseinheit in einer Druckmaschine
DE10020510A1 (de) * 2000-04-26 2001-11-15 Roland Man Druckmasch Dosiersystem zum Einfärben von Walzen in einer Druckmaschine
JP4540183B2 (ja) * 2000-05-24 2010-09-08 株式会社小森コーポレーション 輪転印刷機のインキ装置
US7032511B2 (en) * 2003-04-16 2006-04-25 A.B. Dick Company Fountain ink feed system
CN102909945A (zh) * 2011-08-02 2013-02-06 上海鼎龙机械有限公司 印刷部设有可调式匀墨装置的印刷开槽机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR788082A (fr) * 1935-03-30 1935-10-03 Marinoni Procédé et dispositif d'alimentation en encre des machines à imprimer
DE2514509B1 (de) * 1975-04-03 1976-04-15 Heidelberger Druckmasch Ag Farbkasten fuer Druckmaschinen
EP0023629A1 (fr) * 1979-08-03 1981-02-11 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour régler par zone l'application d'eau de mouillage
EP0025886A1 (fr) * 1979-09-22 1981-04-01 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Dispositif pour ajuster la lame d'encrage d'un encrier d'une machine à imprimer
EP0813962A2 (fr) * 1996-06-19 1997-12-29 MAN Roland Druckmaschinen AG Dispositif por remplir des cavités d'un cylindre, dispositif de raclage et procédé d'interchanger le liquide

Family Cites Families (11)

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US2177656A (en) * 1933-06-30 1939-10-31 Harris Seybold Potter Co Gravure printing press
US3439609A (en) * 1966-09-16 1969-04-22 Capitol Tool & Mfg Co Inc Ink fountain for printing press
DE2228685C3 (de) * 1972-06-13 1978-04-06 Escher Wyss Gmbh, 7980 Ravensburg Beschichtungsvorrichtung
FR2220381B3 (fr) * 1973-03-07 1976-12-03 Roland Offsetmaschf
US4085672A (en) * 1975-09-11 1978-04-25 John Grosart Inking device
US4058058A (en) * 1976-02-26 1977-11-15 George Hantscho Company, Inc. Ink fountain for printing presses
DE3800411A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Farbwerk
FR2689451B1 (fr) * 1992-04-03 1997-01-17 Komori Chambon Dispositif d'encrage pour un appareil d'impression heliographique.
DE4213669C2 (de) * 1992-04-25 1995-06-08 Koenig & Bauer Ag Vorrichtung zur Anstellung einer Kammerrakel
US5410961A (en) * 1992-12-30 1995-05-02 Fit Group, Inc. Fountain assembly
US5957051A (en) * 1997-06-30 1999-09-28 Atwater; Richard G. Single width press with digital ink injection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR788082A (fr) * 1935-03-30 1935-10-03 Marinoni Procédé et dispositif d'alimentation en encre des machines à imprimer
DE2514509B1 (de) * 1975-04-03 1976-04-15 Heidelberger Druckmasch Ag Farbkasten fuer Druckmaschinen
EP0023629A1 (fr) * 1979-08-03 1981-02-11 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour régler par zone l'application d'eau de mouillage
EP0025886A1 (fr) * 1979-09-22 1981-04-01 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Dispositif pour ajuster la lame d'encrage d'un encrier d'une machine à imprimer
EP0813962A2 (fr) * 1996-06-19 1997-12-29 MAN Roland Druckmaschinen AG Dispositif por remplir des cavités d'un cylindre, dispositif de raclage et procédé d'interchanger le liquide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527148A3 (fr) * 2011-05-25 2013-01-23 Heidelberger Druckmaschinen AG Procédé d'impression et élément d'impression offset
WO2014159780A2 (fr) 2013-03-13 2014-10-02 Probity Engineering, Llc Appareil encreur et procédé de réglage du débit d'encre pour appareil de flexographie
EP2969568A4 (fr) * 2013-03-13 2016-11-23 Probity Engineering Llc Appareil encreur et procédé de réglage du débit d'encre pour appareil de flexographie

Also Published As

Publication number Publication date
JPH11291460A (ja) 1999-10-26
DE19903167A1 (de) 1999-09-16
EP0941847B1 (fr) 2002-12-18
DE59903796D1 (de) 2003-01-30
US6076463A (en) 2000-06-20

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