EP1502741B1 - Device for metering liquids for a printing press - Google Patents
Device for metering liquids for a printing press Download PDFInfo
- Publication number
- EP1502741B1 EP1502741B1 EP04103100A EP04103100A EP1502741B1 EP 1502741 B1 EP1502741 B1 EP 1502741B1 EP 04103100 A EP04103100 A EP 04103100A EP 04103100 A EP04103100 A EP 04103100A EP 1502741 B1 EP1502741 B1 EP 1502741B1
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- EP
- European Patent Office
- Prior art keywords
- roller
- metering element
- metering
- edge
- concave face
- 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.)
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Classifications
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- 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
- B41F31/06—Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders
Definitions
- the present invention relates to an apparatus and a method for liquid metering, e.g. for color dosing, according to the respective preamble of claims 1 and 9.
- Such a device and such a method are known from US5003875 known.
- the US3709147 describes another device and method.
- Various devices for metering paint by means of a doctor are known from the prior art.
- the squeegee is mostly used to influence the ink layer thickness on a ink-carrying roller, ie by adjusting the distance of the doctor edge of the roller surface, the thickness of the ink film to be produced is determined.
- the in the US 3,037,451 The embodiment shown in FIG. 5 has a doctor blade 52 which is variable in distance with respect to the surface of the roller 53 and whose surface facing the roller 53 is flat. By means of the edge of the doctor blade 52 ink is doctored off from the surface of the roller 53 and thus determines the thickness of the ink film 55.
- doctor blade 4 shows its planar design.
- the doctor blade 4 has in the region of its doctor edge on a wedge-shaped portion 7 of small extent, which forms by abrasion in the blade edge.
- an embodiment of a metering device shown in FIG. 9 has a surface 82 bent around the surface of a roller, which surface can be brought closer to the roller surface by means of a force-generating unit 85 for producing a thinner ink film by bending.
- the device has no specially designed for color separation blade edge as compared to the other documents of the prior art In this embodiment, the color thickness adjustment due to the pressing is possible even without a blade edge formed in such a way.
- a device for metering liquid for a substrate-processing machine with a rotating roller having a roller surface and a roller radius of curvature, wherein the roller surface carries a liquid film, and with a metering element, characterized in that the metering element has an edge for splitting the liquid film and one of the roller surface facing the first concave surface comprises and with respect to the roller surface is variable in distance.
- the first concave surface preferably extends over a region of the metering element which is larger than the region of the edge of the metering element, in particular over substantially the entire extent of the metering element and / or over a (not negligible) arc range of the roller of z. B. more than about 1 or 2%.
- the respective direction of said regions and said expansion is to be understood to be substantially parallel to the circumferential direction of the roll surface.
- the edge of the metering element is preferably designed for improved color splitting, d. H. the edge is z. B. pointed, wedge-shaped or sharp-edged formed.
- the color metering as a whole ie the production of a color layer of desired thickness, is considerably improved in the manner according to the invention.
- the first concave surface causes better flow characteristics and reduces the pressure of the ink acting on the metering element.
- the metering element preferably comprises a second concave surface opposite the first concave surface.
- the two concave surfaces allow a further reduction of the prevailing pressure of the paint.
- the second concave surface also serves the improved guidance of unneeded, derrakelter color.
- the radius of curvature of the first concave surface preferably corresponds substantially to the radius of curvature of the roller.
- the first concave surface may preferably correspond to an arc of 5 ° to 10 ° or more than 10 ° of the roll surface.
- a not inconsiderable arc region of the roll surface is covered by the concave surface, which is substantially larger than an arc region of an edge region of the dosing element that arises only as a result of wear.
- the metering element is preferably rigid and has a first lower surface which is preferably arranged horizontally to allow the liquid to flow back from the second concave surface into a reservoir.
- the dosing element may e.g. be made of metal, such as stainless steel.
- the liquid is preferably ink. However, it may be e.g. also dampening solution or another liquid used in the printing process (a so-called lithographic liquid) act.
- a method according to the invention for dosing a liquid in a printing press in which liquid is supplied to a storage container and a roll is rotated on the surface of the roll to form a liquid film, is characterized in that the liquid film at one edge of a dosing element, which is one of the roll surface facing concave surface comprises, is split.
- the surface speed of the roller preferably corresponds substantially to that of a plate or forme cylinder of the printing press.
- the dosing element according to the invention with a concave surface advantageously enables roller speeds which correspond to the speed of the printing press.
- Fig. 1 shows a schematic side view of a device 10 according to the invention for the supply and metering of liquid, for example of ink or fountain solution, in a printing press 30 with a plate or forme cylinder 32nd
- the device 10 which here metering ink by way of example, comprises a paint reservoir 12, an ink fountain roller 14 for removing paint from the reservoir 12, and at least one metering element 20 (which may also be referred to as a doctor blade).
- the ink fountain roller 14 includes a roller surface 16.
- the metering element 20 comprises a first concave surface 22 facing the surface 16 and, as shown, may have a second concave surface 24 facing away from the first concave surface 22.
- the first and the second concave Surface meet in an edge 36 (which can also be referred to as blade edge) on each other, the in Fig. 2 is shown in more detail.
- the second concave surface 24 may open at its end facing away from the edge 36 in a flat bottom surface of the dosing element 20 facing the container 12, so that the color is e.g. in the form of drops 11 due to gravity in the container 12 is conveyed back.
- the second concave surface 24 could also be flat or partially circular or have any other shape.
- the metering element 20 is connected with respect to the ink fountain roller 14 by means of a controller 40, which may also be the control of the printing press 30, for adjusting a distance D between the outer surface 16 and the first concave surface 22 in terms of control technology.
- the controller can be known adjustment mechanisms such. B. control motor-driven screws.
- the first concave surface 22 may have a radius of curvature similar or substantially corresponding to the ink fountain roller radius, whereby the contact forces occurring at the metering element 20 are reduced.
- the selected radius of curvature of the surface 22 is dependent on the radius of curvature of the ink fountain roller 14 and the usual operating distance D.
- the distance D should be kept as constant as possible along the arc A, in which the surface 22 faces the surface 16 to those through the Fluid-induced pressure changes to minimize.
- the radius of curvature of the ink fountain roller may be e.g. 6.35 cm (2.5 inches) and the radius of curvature of the concave surface, for example 6.36 cm (2.504 inches).
- the radii of curvature preferably correspond to each other to within 10% or less.
- the movement of the metering element 20 takes place in such a way that the edge 36 moves along a radial line 35 starting from the center of the roller 14.
- the first concave surface 22 may be e.g. an arc A of about 5 ° or more correspond to the roll surface.
- the ink film can be transferred to a reduction roller 40 containing a small amount of the ink, e.g. 1/100, the metered ink on the roller 14 on the (here represented by a single roller) Farbwalzenzug 50 transmits. From there, the ink is transferred to the plate or forme cylinder 32 of the printing machine 30.
- Fig. 2 is a detailed illustration of the ink splitting at the metering element 20.
- the concave surfaces 22 and 24 meet at the outermost end flat, for example 0.025 cm (0.010 inch) thick leading edge 36 wedge-shaped each other.
- the color film is cleaved at the edge 36, so that a part of the color passes between the surface 16 and the concave surface 22 and another part of the color film 13 is conveyed away from the roller surface 16.
- a generally linear velocity profile may arise, indicated by the reference character V, where the velocity at the fixed surface 22 is zero and the velocity at the moving surface 16 corresponds to the surface velocity of the roll 14.
- the speed profile is made uniform throughout the thickness of the ink film, so that the speed of the ink film corresponds to the surface speed of the roller 14.
- the thickness of the outgoing ink film after the metering element 20 decreases at a given distance setting D to half the thickness of the incoming color film.
- a different value for the thickness of the liquid film after the concave surface may also result.
- Such minor deviations are included here and are taken into account in the distance adjustment.
- the linear velocity profile V can accordingly contribute to the outflowing Adjust film thickness, since their ratio to the distance D is substantially constant.
- the dosing element 20 may be e.g. Made of stainless steel and is preferably rigid.
- the flexibility of the edge 36 in the direction of the distance D is to be selected such that movements of the edge in this direction are within the tolerance range of the set film thickness to be produced.
- the surface speed of the roller 14 may be substantially equal to the speed of the printing machine, i. the surface speed of the plate or forme cylinder 32 of e.g. 244 m / min (800 feet / min) or more
- a plurality of adjacently arranged metering elements according to the invention can be provided along the roller 14.
- the metering elements form ink zones that are individually adjustable in accordance with the axially different film thickness.
- an edge cantilever-concave wedge-shaped metering element - in short: 3K metering element (ie at least one wedge surface is concave and runs out in an edge of the metering element), the dosage of the liquid can be significantly improved.
- the supplied liquid film is first split at the edge and then precisely metered by the concave wedge surface, or their distance from a roller.
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- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Coating Apparatus (AREA)
Description
Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Flüssigkeitsdosierung, z.B. zur Farbdosierung, gemäß dem jeweiligen Oberbegriff der Ansprüche 1 und 9.The present invention relates to an apparatus and a method for liquid metering, e.g. for color dosing, according to the respective preamble of claims 1 and 9.
Eine solche Vorrichtung und ein solches Verfahren sind aus der
Die in der
Die in der
Die in der
Die in der
Es ist eine Aufgabe der vorliegenden Erfindung, eine verbesserte Vorrichtung und ein verbessertes Verfahren zur Flüssigkeitsdosierung zu schaffen.It is an object of the present invention to provide an improved apparatus and method for liquid metering.
Es ist eine weitere oder alternative Aufgabe der vorliegenden Erfindung, die Farbdosierung mit einfachen Mitteln bzw. mit einfachen Maßnahmen bei zugleich verbesserter Genauigkeit zu ermöglichen.It is a further or alternative object of the present invention to allow the ink dosage with simple means or with simple measures at the same time improved accuracy.
Eine erfindungsgemäße Vorrichtung zur Dosierung von Flüssigkeit für eine Bedruckstoff verarbeitende Maschine mit einer rotierenden Walze mit einer Walzenoberfläche und einem Walzenkrümmungsradius, wobei die Walzenoberfläche einen Flüssigkeitsfilm trägt, und mit einem Dosierelement, zeichnet sich dadurch aus, dass das Dosierelement eine Kante zur Spaltung des Flüssigkeitsfilms und eine der Walzenoberfläche zugewandte erste konkave Fläche umfasst und bezüglich der Walzenoberfläche abstandsveränderbar ist.A device according to the invention for metering liquid for a substrate-processing machine with a rotating roller having a roller surface and a roller radius of curvature, wherein the roller surface carries a liquid film, and with a metering element, characterized in that the metering element has an edge for splitting the liquid film and one of the roller surface facing the first concave surface comprises and with respect to the roller surface is variable in distance.
Die erste konkave Fläche erstreckt sich vorzugsweise über einen Bereich des Dosierelements, der größer als der Bereich der Kante des Dosierelements ist, insbesondere sich über im Wesentlichen die gesamte Ausdehnung des Dosierelements und/oder über einen (nicht vernachlässigbaren) Bogenbereich der Walze von z. B. mehr als etwa 1 oder 2% erstreckt. Die jeweilige Richtung der genannten Bereiche sowie der genannten Ausdehnung ist dabei im Wesentlichen parallel zur Umfangsrichtung der Walzenoberfläche zu verstehen.The first concave surface preferably extends over a region of the metering element which is larger than the region of the edge of the metering element, in particular over substantially the entire extent of the metering element and / or over a (not negligible) arc range of the roller of z. B. more than about 1 or 2%. The respective direction of said regions and said expansion is to be understood to be substantially parallel to the circumferential direction of the roll surface.
Die Kante des Dosierelements ist vorzugsweise zur verbesserten Farbspaltung ausgebildet, d. h. die Kante ist z. B. spitz, keilförmig oder scharfkantig zulaufend ausgebildet.The edge of the metering element is preferably designed for improved color splitting, d. H. the edge is z. B. pointed, wedge-shaped or sharp-edged formed.
Durch das Zusammenwirken der Kante des Dosierelements zur Farbspaltung und die konkave Ausbildung der ersten Fläche des Dosierelements zur Farbdosierung wird auf erfindungsgemäße Weise die Farbdosierung insgesamt, d. h. die Erzeugung einer Farbschicht gewünschter Dicke, erheblich verbessert.Due to the interaction of the edge of the metering element for color separation and the concave formation of the first surface of the metering element for color metering, the color metering as a whole, ie the production of a color layer of desired thickness, is considerably improved in the manner according to the invention.
Die erste konkave Fläche bewirkt dabei bessere Strömungseigenschaften und reduziert den auf das Dosierelement wirkenden Druck der Farbe.The first concave surface causes better flow characteristics and reduces the pressure of the ink acting on the metering element.
Das Dosierelement umfasst vorzugsweise eine der ersten konkaven Fläche gegenüberliegende zweite konkave Fläche. Die beiden konkaven Flächen ermöglichen eine weitere Reduzierung des herrschenden Drucks der Farbe. Die zweite konkave Fläche dient zudem der verbesserten Führung von nicht benötigter, abgerakelter Farbe.The metering element preferably comprises a second concave surface opposite the first concave surface. The two concave surfaces allow a further reduction of the prevailing pressure of the paint. The second concave surface also serves the improved guidance of unneeded, abgerakelter color.
Der Krümmungsradius der ersten konkaven Fläche entspricht vorzugsweise im Wesentlichen dem Krümmungsradius der Walze.The radius of curvature of the first concave surface preferably corresponds substantially to the radius of curvature of the roller.
Die erste konkave Fläche kann vorzugsweise einem Bogen von 5° bis 10° oder mehr als10° der Walzenoberfläche entsprechen. Dadurch wird ein nicht unerheblicher Bogenbereich der Walzenoberfläche von der konkaven Fläche überdeckt, welcher wesentlich größer als ein Bogenbereich eines nur durch Abnutzung entstehenden Kantenbereichs des Dosierelements ist.The first concave surface may preferably correspond to an arc of 5 ° to 10 ° or more than 10 ° of the roll surface. As a result, a not inconsiderable arc region of the roll surface is covered by the concave surface, which is substantially larger than an arc region of an edge region of the dosing element that arises only as a result of wear.
Das Dosierelement ist vorzugsweise steif und weist eine erste untere Fläche auf, die vorzugsweise horizontal angeordnet ist, um ein Rückfließen der Flüssigkeit von der zweiten konkaven Fläche in einen Vorratsbehälter zu ermöglichen. Das Dosierelement kann z.B. aus Metall, beispielsweise Edelstahl, gefertigt sein.The metering element is preferably rigid and has a first lower surface which is preferably arranged horizontally to allow the liquid to flow back from the second concave surface into a reservoir. The dosing element may e.g. be made of metal, such as stainless steel.
Bei der Flüssigkeit handelt es sich vorzugsweise um Druckfarbe. Es kann sich jedoch z.B. auch um Feuchtmittel oder eine andere im Druckprozess verwendete Flüssigkeit (eine sogenannte lithografische Flüssigkeit) handeln.The liquid is preferably ink. However, it may be e.g. also dampening solution or another liquid used in the printing process (a so-called lithographic liquid) act.
Ein erfindungsgemäßes Verfahren zur Dosierung einer Flüssigkeit in einer Druckmaschine, bei dem Flüssigkeit einem Vorratsbehälter zugeführt und eine Walze zur Bildung eines Flüssigkeitsfilms auf der Oberfläche der Walze gedreht wird, zeichnet sich dadurch aus, dass der Flüssigkeitsfilm an einer Kante eines Dosierelements, das eine der Walzenoberfläche zugewandte konkave Fläche umfasst, gespalten wird.A method according to the invention for dosing a liquid in a printing press, in which liquid is supplied to a storage container and a roll is rotated on the surface of the roll to form a liquid film, is characterized in that the liquid film at one edge of a dosing element, which is one of the roll surface facing concave surface comprises, is split.
Die Oberflächengeschwindigkeit der Walze entspricht vorzugsweise im Wesentlichen der eines Platten- oder Formzylinders der Druckmaschine.The surface speed of the roller preferably corresponds substantially to that of a plate or forme cylinder of the printing press.
Das erfindungsgemäße Dosierelement mit konkaver Fläche ermöglicht in vorteilhafter Weise Walzengeschwindigkeiten, welche der Geschwindigkeit der Druckmaschine entsprechen.The dosing element according to the invention with a concave surface advantageously enables roller speeds which correspond to the speed of the printing press.
Die vorliegende Erfindung wird nachfolgend anhand bevorzugter Ausführungsformen im Hinblick auf die beigefügten, nachfolgend aufgeführten Zeichnungen näher erläutert.The present invention will be explained in more detail below with reference to preferred embodiments with regard to the accompanying drawings listed below.
Es zeigen:
- Fig. 1
- eine schematische Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung zur Flüssigkeitsdosierung; und
- Fig. 2
- eine detailliertere Darstellung der durch die konkaven Flächen bewirkten Flüssigkeitsspaltung.
- Fig. 1
- a schematic side view of an embodiment of the device according to the invention for liquid metering; and
- Fig. 2
- a more detailed representation of the caused by the concave surfaces liquid splitting.
Die Vorrichtung 10, welche hier beispielhaft Farbe dosiert, umfasst einen Farb-Vorratsbehälter 12, eine Farbkastenwalze 14 zur Entnahme von Farbe aus dem Vorratsbehälter 12, und mindestens ein Dosierelement 20 (welches auch als Rakel bezeichnet werden kann). Die Farbkastenwalze 14 umfasst eine Walzenoberfläche 16.The
Das Dosierelement 20 umfasst eine der Oberfläche 16 zugewandte erste konkave Fläche 22 und kann - wie gezeigt - eine von der ersten konkaven Fläche 22 abgewandte zweite konkave Fläche 24 aufweisen. Die erste und die zweite konkave Fläche treffen in einer Kante 36 (welche auch als Rakelkante bezeichnet werden kann) aufeinander, die in
Die zweite konkave Fläche 24 kann an ihrem der Kante 36 abgewandten Ende in eine dem Behälter 12 zugewandte ebene Bodenfläche des Dosierelements 20 münden, so dass die Farbe z.B. in Form von Tropfen 11 aufgrund der Schwerkraft in den Behälter 12 zurückgefördert wird. Die zweite konkave Fläche 24 könnte jedoch auch eben oder teilkreisförmig ausgebildet sein oder eine beliebige andere Form aufweisen.The second
Das Dosierelement 20 ist bezüglich der Farbkastenwalze 14 mittels einer Steuerung 40, bei der es sich auch um die Steuerung der Druckmaschine 30 handeln kann, zur Einstellung eines Abstands D zwischen der Außenfläche 16 und der ersten konkaven Fläche 22 steuerungstechnisch verbunden. Die Steuerung kann dabei bekannte Verstellmechanismen wie z. B. motorisch angetriebene Stellschrauben ansteuern.The
Die erste konkave Fläche 22 kann einen dem Krümmungsradius der Farbkastenwalze ähnlichen oder im Wesentlichen entsprechenden Krümmungsradius aufweisen, wodurch die am Dosierelement 20 auftretenden Andrückkräfte reduziert werden. Der gewählte Krümmungsradius der Fläche 22 ist abhängig vom Krümmungsradius der Farbkastenwalze 14 und vom üblichen Betriebsabstand D. Der Abstand D sollte entlang dem Bogen A, in dem die Fläche 22 der Fläche 16 zugewandt ist, so konstant wie möglich gehalten werden, um die durch die Flüssigkeit hervorgerufenen Druckveränderungen zu minimieren.The first
Gemäß einer bevorzugten Ausführungsform können der Krümmungsradius der Farbkastenwalze z.B. 6,35 cm (2,5 Zoll) und der Krümmungsradius der konkaven Fläche beispielsweise 6,36 cm (2,504 Zoll) betragen. Die Krümmungsradien entsprechen einander vorzugsweise bis auf 10% oder weniger genau.According to a preferred embodiment, the radius of curvature of the ink fountain roller may be e.g. 6.35 cm (2.5 inches) and the radius of curvature of the concave surface, for example 6.36 cm (2.504 inches). The radii of curvature preferably correspond to each other to within 10% or less.
Die Bewegung des Dosierelements 20 erfolgt erfindungsgemäß in der Weise, dass sich die Kante 36 entlang einer vom Mittelpunkt der Walze 14 ausgehenden radialen Linie 35 bewegt.According to the invention, the movement of the
Die erste konkave Fläche 22 kann z.B. einem Bogen A von etwa 5° oder mehr der Walzenoberfläche entsprechen.The first
Sobald der Farbfilm auf der Walze 14 das Dosierelement 20 passiert hat, kann der Farbfilm auf eine Reduzierwalze 40 übertragen werden, die einen geringen Anteil der Farbe, z.B. 1/100, der dosierten Farbe auf der Walze 14 auf den (hier durch eine einzelne Walze dargestellten) Farbwalzenzug 50 überträgt. Von dort wird die Farbe auf den Platten- oder Formzylinder 32 der Druckmaschine 30 übertragen.Once the paint film on the
Auf diese Weise kann ein in der Regel lineares Geschwindigkeitsprofil entstehen, das durch das Bezugszeichen V angedeutet ist, wobei die Geschwindigkeit an der feststehenden Fläche 22 Null beträgt und die Geschwindigkeit an der sich bewegenden Fläche 16 der Oberflächengeschwindigkeit der Walze 14 entspricht. Wenn der Farbfilm das Dosierelement 20 verlässt, wird das Geschwindigkeitsprofil über die gesamte Dicke des Farbfilms vergleichmäßigt, so dass die Geschwindigkeit des Farbfilms der Oberflächengeschwindigkeit der Walze 14 entspricht.In this way, a generally linear velocity profile may arise, indicated by the reference character V, where the velocity at the fixed
Theoretisch reduziert sich die Dicke des auslaufenden Farbfilms nach dem Dosierelement 20 bei gegebener Abstandseinstellung D auf die Hälfte der Dicke des einlaufenden Farbfilms. Es kann sich jedoch aufgrund anderer Faktoren, z.B. des Staudrucks an der Kante, des Luftwiderstands und der Schwerkraft auch ein abweichender Wert für die Dicke des Flüssigkeitsfilms nach der konkaven Fläche ergeben. Derartige geringfügige Abweichungen sind hier mit eingeschlossen und werden bei der Abstandseinstellung berücksichtigt. Das lineare Geschwindigkeitsprofil V kann demgemäß dazu beitragen, die auslaufende Filmdicke einzustellen, da deren Verhältnis zum Abstand D im Wesentlichen konstant ist.Theoretically, the thickness of the outgoing ink film after the
Das Dosierelement 20 kann z.B. aus Edelstahl bestehen und ist vorzugsweise steif. Die Flexibilität der Kante 36 in Richtung des Abstands D ist so zu wählen, dass Bewegungen der Kante in dieser Richtung im Toleranzbereich der eingestellten zu erzeugenden Filmdicke liegen.The
Die Oberflächengeschwindigkeit der Walze 14 kann im Wesentlichen der Geschwindigkeit der Druckmaschine, d.h. der Oberflächengeschwindigkeit des Platten- oder Formzylinders 32 von z.B. 244 m/min (800 Fuß/min) oder mehr entsprechenThe surface speed of the
In Axialrichtung kann entlang der Walze 14 eine Vielzahl von benachbart angeordneten erfindungsgemäßen Dosierelementen vorgesehen sein. Die Dosierelemente bilden in diesem Fall Farbzonen, die einzeln entsprechend der axial unterschiedlichen Filmdicke einstellbar sind.In the axial direction, a plurality of adjacently arranged metering elements according to the invention can be provided along the
Durch den Einsatz eines erfindungsgemäßen kanteaufweisenden-konkavkeilförmigen Dosierelements - kurz: 3K-Dosierelement - (d. h. wenigstens eine Keilfläche ist konkav ausgebildet und läuft in einer Kante des Dosierelements aus) kann die Dosierung der Flüssigkeit erheblich verbessert werden. Der zugeführte Flüssigkeitsfilm wird zunächst an der Kante gespalten und anschließend durch die konkave Keilfläche, bzw. deren Abstand zu einer Walze, präzise dosiert.The use of an edge cantilever-concave wedge-shaped metering element according to the invention - in short: 3K metering element (ie at least one wedge surface is concave and runs out in an edge of the metering element), the dosage of the liquid can be significantly improved. The supplied liquid film is first split at the edge and then precisely metered by the concave wedge surface, or their distance from a roller.
- 1010
- Vorrichtung zur Zufuhr von FarbeDevice for supplying color
- 1111
- Farbtropfencolor drops
- 1212
- FarbvorratsbehälterInk reservoir
- 1313
- Farbfilmcolor film
- 1414
- FarbkastenwalzeInk fountain roller
- 1616
- Walzenoberflächeroll surface
- 2020
- Dosierelementmetering
- 2222
- erste konkave Flächefirst concave surface
- 2424
- zweite konkave Flächesecond concave surface
- 3030
- Druckmaschinepress
- 3232
- Platten-/FormzylinderPlate / form cylinder
- 3535
- Radiallinieradial line
- 3636
- Kanteedge
- 4040
- Steuerungcontrol
- 4040
- Reduzierwalzereduction roll
- 5050
- Farbwalzenzugink train
- AA
- Bogenbow
- DD
- Abstanddistance
- VV
- lineares Geschwindigkeitsprofillinear velocity profile
Claims (11)
- Device (10) for metering fluid for a machine (30) for processing a printing substrate having a rotating roller (14) having a roller surface (16) which has a roller radius of curvature, the roller surface carrying a fluid film (13), and having a metering element (20),
the metering element (20) comprising an edge (36) for splitting the fluid film (13) and being adjustable in terms of spacing relative to the roller surface (16), characterised in that
the metering element (20) comprises a first concave face (22) facing the roller surface (16), and
in that the edge (36) can be moved along a radial line which extends from the centre point of the roller (14). - Device according to claim 1,
characterised in that
the metering element (20) comprises a second concave face (24) which is arranged opposite the first concave face (22). - Device according to claim 1 or claim 2,
characterised in that
the first concave face (22) has a radius of curvature which substantially corresponds to the radius of curvature of the roller (14). - Device according to any one of the preceding claims,
characterised in that
the first concave face (22) corresponds to a curve of approximately from 5° to 10° or more than 10° of the roller surface (16). - Device according to any one of the preceding claims,
characterised in that
the metering element (20) is rigid and is in particular produced from high-grade steel. - Device according to any one of the preceding claims,
characterised in that
the fluid is printing ink. - Device according to any one of the preceding claims,
characterised in that
the thickness (D) of the fluid film (13) after splitting by the metering element (20) corresponds to approximately half of the mean spacing between the concave face (22) and the roller surface (16). - Device according to any one of claims 1 to 7,
characterised in that
it has a reduction roller (42) onto which the ink can be transferred from the roller (16). - Method for metering a fluid in a printing machine (30) having the steps of:conveying fluid to a storage container (12),rotating a roller (14) in order to form a fluid film (13) on the surface (16) of the roller (14), splitting the fluid film (13) at an edge (36) of a metering element (20),characterised in that
the metering element comprises a first concave face (22) facing the roller surface (16) and by the following step:the edge (36) is moved along a radial line which extends from the centre point of the roller (14). - Method according to claim 9,
characterised in that
the surface speed of the roller (14) substantially corresponds to the surface speed of a plate cylinder or shaping cylinder (32) of the printing machine (30). - Method according to claim 9 or claim 10,
characterised in that
the first concave face (22) has a radius of curvature which substantially corresponds to the radius of curvature of the roller (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/628,652 US7546802B2 (en) | 2003-07-28 | 2003-07-28 | Fluid supply device for a printing machine |
| US628652 | 2003-07-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1502741A1 EP1502741A1 (en) | 2005-02-02 |
| EP1502741B1 true EP1502741B1 (en) | 2012-02-15 |
Family
ID=33541463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04103100A Not-in-force EP1502741B1 (en) | 2003-07-28 | 2004-07-01 | Device for metering liquids for a printing press |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7546802B2 (en) |
| EP (1) | EP1502741B1 (en) |
| DE (1) | DE102004032159A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4479748B2 (en) * | 2007-05-31 | 2010-06-09 | Ｔｄｋ株式会社 | Liquid coating device |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1801935A (en) * | 1927-12-31 | 1931-04-21 | Hoe & Co R | Inking mechanism |
| US2232274A (en) * | 1939-12-05 | 1941-02-18 | Markem Machine Co | Inking appliance for marking machines |
| US3037451A (en) * | 1959-07-15 | 1962-06-05 | William F Davis | Means for dispensing and apportioning fluids |
| US3273535A (en) * | 1964-10-06 | 1966-09-20 | Rice Barton Corp | Trailing-blade-coater including adjustable drag-blade |
| US3294060A (en) * | 1966-03-21 | 1966-12-27 | Donald B Mcintyre | Fluid applicator |
| US3585932A (en) * | 1968-06-07 | 1971-06-22 | Wallace H Granger | Automatic inking system for rotary newspaper printing press |
| US3664261A (en) * | 1968-06-17 | 1972-05-23 | Harold P Dahlgren | Straight feed press |
| US3709147A (en) * | 1970-12-03 | 1973-01-09 | W Granger | Ink transfer cylinder mounting with adjustable drive clutch |
| US4184429A (en) * | 1972-02-09 | 1980-01-22 | Max Datwyler & Co. | Constant bevel doctor blade and method and apparatus using same |
| US4007682A (en) * | 1974-04-24 | 1977-02-15 | Xerox Corporation | Reverse angle mounted ink-splitting doctor blade |
| NL156347B (en) * | 1975-04-03 | 1978-04-17 | Heidelberger Druckmasch Ag | INK BOX FOR A PRINTING MACHINE. |
| DE3033995C2 (en) * | 1980-09-10 | 1984-11-22 | Koenig & Bauer AG, 8700 Würzburg | Device for maintaining the ease of movement of metering elements in ink fountains of printing machines |
| DE3217569C2 (en) * | 1982-05-11 | 1985-11-28 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Method and device for metering the ink in offset printing machines |
| JPS59169897A (en) * | 1983-03-17 | 1984-09-25 | Toppan Printing Co Ltd | Printing plate |
| US4615295A (en) * | 1985-04-10 | 1986-10-07 | Magna-Graphics Corporation | Doctor blade apparatus for coating apparatus |
| DE3605613A1 (en) * | 1986-02-21 | 1987-08-27 | Jagenberg Ag | COATING DEVICE FOR COATING RAILWAYS |
| US5003875A (en) * | 1989-03-13 | 1991-04-02 | Adolph Coors Company | Fountain roll and assembly for can decorating apparatus |
| DE3909878C1 (en) * | 1989-03-25 | 1990-08-02 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De | |
| EP0542635B1 (en) * | 1991-10-15 | 1999-06-09 | Eastman Kodak Company | Magnetic dispersion coating method and apparatus having high shear regions |
| DE4402226C2 (en) * | 1994-01-27 | 1997-11-06 | Voith Gmbh J M | Doctor device |
| US5826509A (en) * | 1995-10-18 | 1998-10-27 | Deneka; P. Kenneth | Printing coating head device |
| DE19631301A1 (en) * | 1996-08-02 | 1998-02-05 | Gorter Cornelis | Ink chamber doctor blade for a printing press |
| DE10013876B4 (en) * | 1999-04-08 | 2013-10-02 | Heidelberger Druckmaschinen Ag | Method for controlling the coloring when printing with a printing machine |
| JP3148750B1 (en) * | 1999-10-21 | 2001-03-26 | 株式会社東京機械製作所 | Ink rail for printing press |
-
2003
- 2003-07-28 US US10/628,652 patent/US7546802B2/en not_active Expired - Fee Related
-
2004
- 2004-07-01 EP EP04103100A patent/EP1502741B1/en not_active Not-in-force
- 2004-07-02 DE DE102004032159A patent/DE102004032159A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1502741A1 (en) | 2005-02-02 |
| DE102004032159A1 (en) | 2005-02-17 |
| US20050022685A1 (en) | 2005-02-03 |
| US7546802B2 (en) | 2009-06-16 |
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