EP1022137B2 - Dosification numérique d'encre - Google Patents

Dosification numérique d'encre Download PDF

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Publication number
EP1022137B2
EP1022137B2 EP99123241A EP99123241A EP1022137B2 EP 1022137 B2 EP1022137 B2 EP 1022137B2 EP 99123241 A EP99123241 A EP 99123241A EP 99123241 A EP99123241 A EP 99123241A EP 1022137 B2 EP1022137 B2 EP 1022137B2
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EP
European Patent Office
Prior art keywords
ink
valve
printing
piezo
printing machine
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
EP99123241A
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German (de)
English (en)
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EP1022137A1 (fr
EP1022137B1 (fr
Inventor
Michael Dr. Voge
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
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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
    • B41F35/04—Cleaning arrangements or devices for inking 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
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention relates to an offset printing machine according to the preamble of claim 1 and a method for supplying the offset printing press with printing ink.
  • Such an offset printing machine is off DE2951651 known.
  • a conventional inking unit for an offset printing machine in Fig. 7 shown.
  • the inking unit includes an ink fountain 122 as a reservoir for ink 124, a Farbduktor 126, a color lifter 128 and a roller assembly, in this example four distribution cylinders 130a to 130d, four inking rollers 132, which roll on a plate cylinder 134 of the printing press, and a number of ink transfer rollers 136 contains.
  • the need for ink 124 is adjusted in zones depending on the printed image by pressing a resilient knife (color knife) more or less strongly against the ink fountain roller 126 and thus changing the amount of ink passing through the gap between the ink knife and the ink fountain roller 126 ,
  • the regulation of the printing ink 124 over the entire width of the ink ductor 126 is effected by a change in the color removal strip, which is removed by the ink lifter 128 in a rhythmic pendulum movement of the ink fountain roller 126.
  • the ink 124 is repeatedly distributed, split and triturated by an axial movement of the distribution cylinder 130a to 130d, before being applied by means of the inking rollers 132 on the plate cylinder 134.
  • the invention has for its object to provide an inking unit that allows extremely accurate color metering, which is simple and compact and can be derived by simple design changes of a conventional inking unit.
  • the offset printing machine enables the use of a standard offset ink which has a dynamic viscosity of more than 10 Pa s at room temperature and low shear rate, e.g. 50 to 70 Pa s.
  • a standard offset ink which has a dynamic viscosity of more than 10 Pa s at room temperature and low shear rate, e.g. 50 to 70 Pa s.
  • the at least one valve is preferably a valve with piezoelectric actuators as adjusting elements, a so-called piezoelectric valve.
  • a valve as for example in the DE-A-4 220 177 has response times on the order of microseconds. Thus, it can be opened and closed many times faster than conventional solenoid valves, which have response times of several milliseconds. This allows a very fine dosing of the ink, preferably by pulse length controlled full opening and closing of the valve or alternatively by controlling the flow rate of a valve whose degree of opening is controlled by a fast control loop.
  • Ink-jet printers normally spray low viscosity paint directly onto paper, and in one of the known techniques, ink is metered by briefly compressing a small volume of ink by a piezoelectric actuator, spraying a droplet of ink onto a pixel.
  • relatively high-viscosity offset printing ink can be used in the invention, and the compressed and heated ink is already under a sufficiently high pressure for spraying paint, so that it only needs to be metered by means of the piezo-valve.
  • the valve design for a viscosity-independent ink dosage as possible is a valve with a spherical closure element, which faces a spherical recessed valve seat, in which an opening with a substantially smaller diameter than the spherical closure element is formed.
  • a nozzle downstream of the valve determines the volume flow. In this case, this nozzle may have a very short flow channel, whereby the mode of action corresponds to a diaphragm.
  • the paint metering device includes a series of nozzles directed at the surface of one of the distribution cylinders.
  • the distribution cylinder moves in the machine cycle along its longitudinal axis back and forth, so that the ink is rubbed laterally.
  • care must be taken that the ink spraying does not occur synchronously with the machine cycle or the rubbing motion, which would result in an inhomogeneous color profile.
  • a homogenization of the applied ink layer can be achieved, for example, by the fact that the time of ink application is offset in time with each Reiberhub or each Reibernavung something, such as by temporal modulation of the valve control pulses.
  • the invention is suitable both for conventional offset printing presses (sheetfed and web presses) with ink zones and for zoneless inking units.
  • a valve is provided for each inking zone, the outlet of which is connected to one or more nozzles located in that inking zone. The more nozzles per color zone are present, the smoother the thickness of the applied color layer. If sprayed with variable timing on a distribution cylinder, as described above, can be achieved with a single nozzle per color zone, a sufficiently uniform color distribution. On the other hand, when using many nozzles side by side also be sprayed on another high-speed roller as a distribution cylinder.
  • the color reservoir may e.g. a color cartridge, which is located in a pressure vessel and which is connected via a pressure line with the at least one valve.
  • the ink is pressurized by pressurizing the interior of the pressure vessel.
  • the required pressure can be easily generated by means of a pressure booster from the available in a printing operation compressed air.
  • An alternative to ink supply by cartridges is a loose package supply, e.g. the paint supply via the drum, which is known in the art, and which does not require a cartridge change.
  • the inking unit according to the invention allows such a precise and uniform ink metering that one manages with significantly fewer ink rollers than before.
  • conventional components such as ink fountain and ductor can be saved.
  • ink rollers For the remaining part of the inking you need no special components, but it can be conventional components, especially conventional ink rollers are used.
  • a conventional inking unit can be easily converted to an inking unit according to the invention.
  • the high-precision ink metering according to the invention makes it possible to dispense the printing ink without excess according to its requirements in the printing press, so that it is possible to dispense with any doctoring device. If you still work with a certain excess of color and accordingly a squeegee device used, theußrakelnde amount of ink can be much lower.
  • a piezo valve 2 which in Fig. 1 is shown in longitudinal section, contains a base body 4 with an L-shaped cross-section.
  • On the shorter leg of the Base 4 are based on two piezoelectric translators 6, each consisting of a stack piezoceramic plates.
  • the piezoelectric translators 6 extend parallel to the longer leg of the main body 4 to a tapered operating lever 8.
  • the blunt end of the actuating lever 8 is connected by means of a screw 10 which extends between the two piezoelectric translators 6 and parallel to the shorter leg screwed to the base body 4, whereby the two piezoelectric translators 6 are firmly biased between the shorter leg of the base body 4 and the actuating lever 8.
  • an actuating rod 12 which is fixed by pressing voltage on the actuating lever 8 extends.
  • the actuating rod 12 extends through a matching bore in the longer leg of the base body 4 into a channel 14 formed therein.
  • the actuating rod 12 carries a valve ball 16.
  • On the side facing away from the actuating rod 12 side of the valve ball 16 contains the main body has a nozzle 18 with an opening 20 which has a smaller diameter than the valve ball 16.
  • the valve ball 16 closes the opening 20, and when the valve ball 16 is raised, the channel 14 communicates via the narrow opening 20 with the outside.
  • the channel 14 carries a printing ink which is heated to about 40 to 70 ° C and under a pressure of e.g. 40 bar stands.
  • the ink is a standard offset ink having a viscosity of e.g. 50 to 70 Pa s at room temperature, which is greatly reduced by the heating. This and the relatively high pressure make it possible to finely dose the ink by means of the piezo-valve 2 and subsequently to spray it from one or more nozzles.
  • FIG. 1 shown piezoelectric valve 2 operates as follows. If opposite polarity electrical voltages are applied to the two piezoelectric translators 6, one of the two piezoelectric translators 6 expands a little, while the other shortens a little. As a result, the operating lever 8 tilts in the direction of the longer leg of the main body 4 or away, depending on the applied voltage. The elongation or shortening of the individual piezoelectric translators 6 is indeed very small, but at the tip of the actuating lever 8 is achieved but a stroke in the order of a few hundred micrometers. Accordingly, the valve ball 16 is moved, and depending on the position of the valve ball 16, the opening 20 in the nozzle 18 is either closed or kept more or less open.
  • the passage rate of the piezo-valve 2 is controlled by being alternately fully closed and fully opened, the length of electrical control pulses, during which the valve ball 16 assumes a defined open position, is changed.
  • the outlet opening 20 is designed according to a diaphragm 18, that is, that the nozzle channel is designed short against its diameter.
  • An aperture 18 is characterized in that the flow rate is independent of viscosity. If the pressure in the device is kept constant, the flow is exclusively time-dependent.
  • Fig. 2 shows an arrangement of a plurality of piezo-valves 2 according to section II Fig. 1 side by side.
  • the piezo valves 2 have a common main body 4 and are supplied via a common channel 14 with ink.
  • the valve bar of Fig. 2 is placed lengthwise close to the surface of a rubbing cylinder 38, as shown Fig. 2 along with Fig. 3 can be seen.
  • the distribution cylinder 38 moves in operation along its axis, so that the Farbkleckse 74 distributed in the form of serpentine lines on the distribution cylinder 38 become.
  • a piezo-valve 2 is provided for each color zone, so that the ink can be finely dosed depending on the current needs in the respective color zone.
  • Fig. 4 shows the components of a paint supply for a schematically illustrated piezo-valve 34, which in this example includes a single nozzle 36 which is directed to the surface of a rubbing cylinder 38 of the inking unit.
  • a multi-nozzle piezoelectric valve will be described below.
  • the distribution cylinder 38 reciprocates in its axial direction by about 35 mm as it rotates, as indicated by arrows. With the nozzle 36 is thus achieved an axial portion 40 on the distribution cylinder 38, which is slightly wider than the width of a color zone of 32 mm.
  • another piezo-valve 34 is provided (in Fig. 4 Not shown).
  • ink supply supplies not only the one shown piezoelectric valve 34, but all the piezo valves 34 that are needed for the printing width of the printing press, such as a valve bar as in Fig. 2 shown.
  • a pressure booster 42 receives via a pressure line 44 compressed air of about 6 to 8 bar, as it is available to operate a printing press, and generates compressed air with about 40 bar, which is fed via a further pressure line 46 to a pressure vessel 48.
  • the pressure vessel 48 includes a base 50 through which the pressure line 46 and a Farbauslrea effet 52 extend, and a pressure-tight screw-bell 53.
  • Within the pressure vessel 48 is a paint cartridge 54 which is connected to the Farbauslledge effet 52.
  • the ink cartridge 54 is open at its top or closed with a movable plunger, so that the pressure within the pressure vessel 48 drives the ink from the ink cartridge 54 in the Farbauslraw effet 52.
  • the level of ink within the ink cartridge 54 is monitored by a level sensor 56 which is connected by a cable to a sensor electronics 58 which provides a warning signal to a central printing machine controller, not shown, as the contents of the ink cartridge 54 tend toward the end.
  • a continuous ink supply from a loose container such as a drum by means of a drum pump can be used.
  • Suitable drum pumps are commercially available in various forms.
  • the operating pressure air of the printing machine is also supplied to a tank 60 containing a cleaning liquid to pressurize the cleaning liquid.
  • a cartridge with cleaning liquid which is pressurized may be used.
  • An outlet conduit of the tank 60 may be selectively connected to a conduit 63 or an outlet 64 via a three-way cock 62.
  • An inlet line 66 of the piezo-valve 34 can be connected via a further three-way valve 68 selectively with the Farbauslledgetechnisch 52 or 63 with the line piece.
  • the three-way valve 68 is in the illustrated position, in which the inlet line 66 of the piezo-valve 34 is connected to the paint outlet 52.
  • the three-way valves 62 and 68 are adjusted so that the cleaning liquid can flow through the piezo-valve 34 and through the valve bar.
  • the required for color change cleaning of the piezo-valve 34 and the piezo valves 94 can be used in an advantageous manner also to make the spraying of the ink rollers with cleaning liquid.
  • the previously required spraying device for washing liquid for cleaning the inking deleted.
  • the corresponding advantages are that with simultaneous use of the piezo-valve 34 for the metering of ink and washing liquid less cost and less space is required or is.
  • the cleaning of the piezo-valves 34 automatically results in spraying of the rubbing cylinder 38 with washing liquid. About this distribution cylinder 38 then takes place the distribution of the washing liquid in the whole inking unit.
  • the attachment of the three-way valve 68 close to the piezo valve 34 is advantageous. In other cases, a previous sucking back of the ink from the line system 14, 66 in the ink cartridge 54 or a corresponding reservoir. Thereafter, the cleaning of the piezo-valve 34 and then the entire inking begins.
  • the inlet line 66 of the piezo-valve 34 passes through a schematically illustrated preheating device 70, which heats the pressurized ink from the ink cartridge 54 to a temperature of up to 65 ° C.
  • the piezo valve 34 includes a heater, not shown, which keeps it at the same temperature so that the ink does not cool therein.
  • the piezo-valve 34 is driven by a valve control unit 72 connected to the central printing machine control by means of square pulses which open the piezo-valve 34 for the duration of each pulse while it is closed in the remaining time.
  • the short reaction time of the piezo-valve 34 allows the pulses to follow each other very rapidly, e.g. with a frequency of 3 kHz, and the ink accordingly distributed finely applied to the distribution cylinder 38.
  • the nozzle 36 of the piezo valve 34 injects tiny splashes of paint 74 onto the rotating distributor cylinder 38, as in FIG Fig. 4 indicated schematically, while a long rectangular pulse generates a more or less long line on the distribution cylinder 38. Because of the axial movement of the friction cylinder 38, the ink spots 74 are distributed not only in the radial direction but also in the axial direction on the distribution cylinder 38.
  • the piezoelectric valve 34 is actuated synchronously with the machine cycle, the pattern of the ink spots 74 applied to the dispensing cylinder 38 is repeated after one or more revolutions, which would result in an uneven color profile. Therefore, it is advantageous if the color output is offset in time relative to the machine cycle by a suitable software control several times during a Reibzylinderumwindung, for example by a temporal modulation of the pulse train before and back, whereby a zonal equalization of the applied ink can be achieved.
  • Another option for the most uniform application of paint is to squirt the amount of ink needed per ink roller revolution in many small splashes of color instead of a few large.
  • ink application may also be useful in the case of using a multiple nozzle per piezo valve 34, but with a sufficiently large number of nozzles, one may also come without targeted variation of the timing with respect to the machine cycle.
  • the amount of ink applied to the dispensing cylinder is adjusted by adjusting the duration of the rectangular pulses during which the piezo valve 34 is open and the nozzle 36 injects ink onto the dispensing cylinder 38.
  • Fig. 5 is a FIGS. 2 and 3 similar view of a piezoelectric valve 2, which does not inject the ink directly on the distribution cylinder 38, but has a distribution attachment 116, which may be, for example, a one-piece or multi-part plastic injection molded part.
  • the distributor attachment 116 includes a channel 118 in the form of an inverted "T" whose central part is connected to the opening 20 in the nozzle 18 of the piezo-valve 2 and whose transverse part contains four nozzles 120 arranged in a row.
  • the multiple nozzle formed thereby allows a single piezo valve 2 to sweep the distribution cylinder 38 across the width of a full inking zone with finely divided ink, as indicated by the ink spots 74.
  • a zoneless inking unit with or without squeegee device, such a multi-nozzle can even extend over the entire printing width, so that you can make do with a single piezo valve.
  • Fig. 6 shows an inking unit that works from a conventional inking unit as in Fig. 7 is derived by the color box 122, the ink fountain roller 126 and the ink lifter 128 have been removed.
  • a piezo valve 94 or a corresponding valve strip with a plurality of piezo valves 94 are arranged so that the distribution on the distribution cylinder 130a.
  • a second embodiment also omitted in Fig. 6 dash-dotted drawn parts, and the piezo valves 94 are not disposed on the distribution cylinder 130a, but on the distribution cylinder 130b.
  • an inking unit can be produced with much fewer moving parts than a conventional inking unit, which also enables a uniform and extremely precise inking.
  • it is furthermore possible to dispense the printing ink without excess and thus to dispense with a squeegee device, as required in conventional offset inking units for sheetfed or web presses. Since there is no mechanical wear in the ink metering area, the ink dosage is very well reproducible. Furthermore, the cleaning of the inking unit is facilitated.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (9)

  1. Machine offset avec un système d'encrage qui contient un ou plusieurs cylindres distributeurs (38 ; 130a-d), des rouleaux de transfert d'encre (136), des rouleaux d'application encreurs (132), un réservoir d'encre pour l'encre d'imprimerie et un dispositif de dosage d'encre avec au moins une soupape à réglage électrique pour le dosage de l'encre d'imprimerie ainsi qu'un dispositif de pompage à haute pression (42) pour l'alimentation du dispositif de dosage d'encre en encre d'imprimerie à une pression élevée prédéterminée à partir du réservoir d'encre (54), caractérisé en ce qu'il est prévu un dispositif de chauffage (70) pour réchauffer l'encre d'imprimerie à une température préalablement déterminée supérieure à la température ambiante, en ce que la au moins une soupape (2 ; 34 ; 94) du dispositif de dosage d'encre à un court temps de réaction et a une faible dépendance à la viscosité de sa quantité d'admission et en ce qu'au moins la une soupape (2 ; 34 ; 94) contient un élément de fermeture sphérique (16) qui est situé en face d'un siège de soupape (18) présentant un creux sphérique dans lequel est formée une ouverture (20) d'un diamètre sensiblement inférieur à celui de l'élément de fermeture sphérique.
  2. Machine d'impression offset selon la revendication 1, caractérisé en ce que la au moins une soupape (2 ; 34 ; 94) contient des actuateurs piézoélectriques (6).
  3. Machine d'impression offset selon l'une des revendications précédentes, caractérisé en ce qu'à la température ambiante et à une faible vitesse de cisaillement, l'encre a une viscosité dynamique de plus de 10 Pa, en ce que la pression générée par le dispositif de pompe est comprise environ entre 10 et 100 bars et en ce que la température de l'encre d'imprimerie chauffée par le dispositif de chauffage (70) est comprise environ entre 40 et 70°C.
  4. Machine d'impression offset selon l'une des revendications précédentes, caractérisé en ce que le dispositif de dosage d'encre comprend une rangée de buses (18 ; 36 ; 120) qui sont dirigées vers la surface d'un des cylindres distributeurs (38 ; 130) .
  5. Machine d'impression offset selon la revendication 4, caractérisé en ce qu'il est prévu pour chaque zone d'encre une soupape (2 ; 34 ; 94) dont la sortie est reliée à une ou plusieurs buses (18 ; 36 ; 120) situées dans cette zone de couleur.
  6. Machine d'impression offset selon l'une des revendications précédentes, caractérisé en ce que le réservoir d'encre est soit une cartouche d'encre (54) soit est formé par un récipient amovible.
  7. Procédé d'alimentation d'une machine d'impression offset selon les revendications 1 à 6, en encre d'imprimerie, caractérisé en ce que l'encre d'imprimerie est dosée sans excédent dans la machine d'impression en fonction des besoins.
  8. Procédé selon la revendication 7, caractérisé en ce que le temps de réaction de la au moins une soupape (2 ; 34 ; 94) se situe dans l'ordre de grandeur des microsecondes et en ce que l'encre est dosée en ouvrant et fermant la au moins une soupape (2 ; 34 ; 94) commandée par la durée d'impulsion.
  9. Procédé selon la revendication 7, caractérisé en ce que l'encre d'imprimerie n'est pas pulvérisée sur un cylindre distributeur (38 ; 30) de la machine d'impression de manière synchronisée avec le cycle de la machine, dans le fait que la distribution de l'encre est décalée dans le temps par rapport au cycle de la machine lors de chaque course du distributeur ou lors de chaque rotation du distributeur.
EP99123241A 1998-12-22 1999-11-26 Dosification numérique d'encre Expired - Lifetime EP1022137B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19859436 1998-12-22
DE19859436A DE19859436B4 (de) 1998-12-22 1998-12-22 Digitale Farbdosierung

Publications (3)

Publication Number Publication Date
EP1022137A1 EP1022137A1 (fr) 2000-07-26
EP1022137B1 EP1022137B1 (fr) 2004-07-21
EP1022137B2 true EP1022137B2 (fr) 2011-05-25

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ID=7892245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123241A Expired - Lifetime EP1022137B2 (fr) 1998-12-22 1999-11-26 Dosification numérique d'encre

Country Status (5)

Country Link
US (1) US6516721B1 (fr)
EP (1) EP1022137B2 (fr)
JP (1) JP4450915B2 (fr)
AT (1) ATE271469T1 (fr)
DE (2) DE19859436B4 (fr)

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DE10133634B4 (de) 2000-08-09 2011-06-22 Heidelberger Druckmaschinen AG, 69115 Farbwerk, insbesondere einer Offsetdruckmaschine
DE10247778B4 (de) * 2001-11-09 2013-05-08 Heidelberger Druckmaschinen Ag Modular aufgebaute Farbdosiervorrichtung für eine Druckmaschine
EP1681160B1 (fr) * 2001-11-22 2007-04-18 Koenig & Bauer Aktiengesellschaft Procédé de fonctionnement d'un mécanisme d'impression
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EP1415805A1 (fr) * 2002-10-28 2004-05-06 Hauni Maschinenbau AG Groupe d'impression avec unité d'éaquilibrage de température
US6860591B2 (en) * 2003-02-27 2005-03-01 Xerox Corporation Ink container
JP4294360B2 (ja) * 2003-04-11 2009-07-08 大日本スクリーン製造株式会社 ニス塗布方法、ニス塗布装置および印刷機
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US6810805B1 (en) 2003-06-13 2004-11-02 Richard G. Atwater Ink pump with rotating reciprocating pump and rotary valve
DE102005024007B4 (de) * 2005-05-25 2008-05-29 Koenig & Bauer Aktiengesellschaft Druckwerk mit Farbwerk zum Auftragen von Druckfarbe auf einen Formzylinder einer Druckmaschine
DE102006049917B4 (de) * 2006-01-13 2008-03-06 Koenig & Bauer Aktiengesellschaft Farbzuführ-/Dosiereinrichtung in einem Pumpfarbwerk einer Druckmaschine
DE102006001825B4 (de) * 2006-01-13 2007-12-13 Koenig & Bauer Aktiengesellschaft Dosierventileinrichtung
US20070203433A1 (en) * 2006-02-27 2007-08-30 Murphy Martin P Relaxation inducing apparatus
DE102007004472A1 (de) * 2007-01-30 2008-07-31 Koenig & Bauer Aktiengesellschaft Verfahren und Vorrichtung zur Ermittlung des Füllgrades von Medienbehältern
DE102007042463A1 (de) * 2007-09-06 2009-03-12 Manroland Ag Farbdosiervorrichtung für eine Druckmaschine
DE102008011007B4 (de) * 2008-02-25 2011-11-17 Technotrans Ag Farbschonende Farbversorgung von Druckmaschinen
DE102012019953A1 (de) * 2012-06-15 2013-12-19 Heidelberger Druckmaschinen Ag Verfahren zum indirekten Auftragen von Druckflüssigkeit auf einen Bedruckstoff
JP6194481B2 (ja) * 2014-03-17 2017-09-13 パナソニックＩｐマネジメント株式会社 スクリーン印刷装置及びスクリーン印刷方法
CN104029482B (zh) * 2014-06-10 2016-08-24 北京印刷学院 一种自动配墨机及自动配墨方法
WO2022174958A1 (fr) * 2021-02-18 2022-08-25 Koenig & Bauer Ag Systèmes d'alimentation en encre et procédés pour alimenter en encre d'impression une unité d'encrage d'un groupe d'impression en creux, et groupe d'impression en creux et procédé de fonctionnement d'un système d'alimentation en encre

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EP1022137A1 (fr) 2000-07-26
JP2000185390A (ja) 2000-07-04
DE19859436A1 (de) 2000-06-29
JP4450915B2 (ja) 2010-04-14
US6516721B1 (en) 2003-02-11
DE59910008D1 (de) 2004-08-26
DE19859436B4 (de) 2009-12-24
EP1022137B1 (fr) 2004-07-21
ATE271469T1 (de) 2004-08-15

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