EP0195727B1 - Inking unit with independently adjustable ink measuring sections - Google Patents

Inking unit with independently adjustable ink measuring sections Download PDF

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Publication number
EP0195727B1
EP0195727B1 EP86400599A EP86400599A EP0195727B1 EP 0195727 B1 EP0195727 B1 EP 0195727B1 EP 86400599 A EP86400599 A EP 86400599A EP 86400599 A EP86400599 A EP 86400599A EP 0195727 B1 EP0195727 B1 EP 0195727B1
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EP
European Patent Office
Prior art keywords
metering
segments
ink
inking roller
segment
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Expired
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EP86400599A
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German (de)
French (fr)
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EP0195727A1 (en
Inventor
Michel Armelin
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Machines Chambon SA
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Machines Chambon SA
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Application filed by Machines Chambon SA filed Critical Machines Chambon SA
Priority to AT86400599T priority Critical patent/ATE39885T1/en
Publication of EP0195727A1 publication Critical patent/EP0195727A1/en
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Publication of EP0195727B1 publication Critical patent/EP0195727B1/en
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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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • the present invention relates to an inkwell with metering segments individually adjusted for a printer, according to the preamble of claim 1 (DE-A-3 047 689).
  • Inkwells for printing machines which comprise a container containing ink, this container being delimited, on one side, by a horizontal ink cylinder driven in rotation, on the opposite side, by a body extending parallel to the ink cylinder , and laterally, by two vertical flanges.
  • the body carries, in the immediate vicinity of the peripheral surface of the ink cylinder, a scraper blade parallel to the ink cylinder and which is formed by a succession of metering segments adjacent to each other, and the front faces of which are delimited, on the side of the ink cylinder, by scraping edges which extend parallel to the ink cylinder, at a small distance from the peripheral surface thereof, this distance being able to be adjusted individually for each metering segment.
  • the end portions of the metering segments which are opposite to the front faces carrying the scraping edges are fixed to the body of the inkwell.
  • the dosing segments are actuated individually by pushers extending through the body and which are controlled, for example, by adjusting levers or motorized assemblies.
  • Each of these pushers exerts a push on the mobile end part of the metering segment associated with it.
  • Such an inkwell is described for example in French patent application N 83 01945.
  • each dosing segment forms a lever of the first kind comprising a first lever arm, of small length, between the scraping edge of the segment dispenser and the pivot axis thereof, and a second lever arm, of great length, between the point of application of the force of the plunger on the metering segment and the pivot axis.
  • Inkwells of this type known to date have many drawbacks such as the risk of ink penetration between the metering segments and between them and the common support block or the pushers. Seals are placed, in certain places where this is possible, without however being able to avoid this penetration by clearances between the metering segments. This thin layer ink dries, dirty and prevents the inkwell working in good conditions by making its maintenance very difficult.
  • the present invention aims to remedy these drawbacks by providing a particularly simple design inkwell, eliminating all the intermediate elements between pushers and segments and making it possible to obtain very precise precision in the adjustment of the positions of the individual metering segments.
  • this inkwell with metering segments of the type mentioned above is characterized in that the common pivot axis of the metering segments is constituted by a rod held clamped between aligned horizontal grooves of the various adjacent metering segments, on the one hand , and a horizontal groove of a support for the dosing segments secured to the body of the inkwell.
  • each pusher can work not only by pushing on the metering segments, but possibly in traction on them, which allows, by simple and known means, possibly to remove the springs placed between the common block and the metering segments.
  • the inkwell according to the invention which is shown in the drawing comprises an ink cylinder 1 driven in rotation in the direction of the arrow f, that is to say in the anticlockwise direction, a body 2 extending parallel lying at the axis of the cylinder 1 and two lateral and vertical flanges 3.
  • the cylinder 1, the body 2 and the two flanges 3 constitute a container containing an ink reserve 4 intended to form, on the peripheral surface of the ink cylinder 1 , a film 5 of adjustable thickness.
  • the inkwell comprises, for adjusting the thickness of the film 5, a succession of individual metering segments 6 which are substantially coplanar, both on their anterior faces and on their upper faces, and are juxtaposed with each other in a direction parallel to the axis of the ink cylinder 1, in a way forming a scraper blade.
  • Each of these individual dosing segments 6 is constituted by a plate of parallelepiped shape, which is kept applied against a common support block 7, by means of a spring 8 passing through holes drilled in the dosing segments 6 and the support block 7
  • This support block 7 is in the form of a parallelepiped and it is fixed on the body 2 and more particularly in a rebate 9 thereof, by means of screws 11.
  • the rebate 9 has a lower bearing face 9a and a perpendicular front face 9b against which the support block 7 is pressed.
  • Each metering segment 6 comprises an upper front face 6a which is delimited, on the side of the ink cylinder 1, by a scraping edge 6b situated in the immediate vicinity of the peripheral surface of this cylinder. This scraping edge 6b can be sharp or else it can form a chamfer of small width.
  • the various metering segments 6 are biased towards the common support block 7 by means of their fixing springs 8.
  • the ends of each spring 8 can be respectively hooked to the common support block 7 and to the associated metering segment 6 by any appropriate means. , for example by means of axes 8a and 8b housed in holes made respectively in the common support block 7 and the metering segment 6.
  • Each metering segment 6 has, in the upper part of its left internal face 6c, that is to say above the spring 8, a horizontal groove 6d, with a V-shaped cross section, all the horizontal grooves 6d being located at the same height and therefore aligned. Opposite the groove 6d of the various metering segments 6 extends, in the upper part of the right external face of the support 7, a horizontal groove 7b. Between this common groove 7b on the one hand and the aligned grooves 6d of the various metering segments 6 on the other hand is housed a rod 13 constituting a common pivot axis for all the individual metering segments 6.
  • each metering segment 6 is pressed, under the action of the spring 8 tending to rotate the segment 6 in a clockwise direction around the rod 13, against the end an adjustment pusher 14.
  • Each pusher 14 is axially movable in a hole 15 drilled right through in the body 2 and in a coaxial hole 16, forming a guide, drilled right through in the lower part of the common support block 7.
  • the pusher 14 protrudes outside with respect to the hole 16 and it bears at this point, at its end, against the internal face 6c of the segment 6, that is to say that which faces towards the support block 7.
  • the other end of the pusher 14 is actuated in translation by any means such as an adjustment eccentric which can be driven in rotation, in a manner known per se, by a lever for example, or by any other manual or motorized device.
  • a control device 17 of the motorized type comprising a motor 18 and a movement transmission mechanism 19, is shown mounted outside the body 2, in FIG. 1.
  • the rotation of the motor 18, in one direction or in the 'other therefore causes an axial movement of the pusher 14 which thus pushes more or less the end part of the individual metering segment 6 with which it is associated.
  • the latter which in a way constitutes a lever of the first kind, pivots around the upper axis formed by the rod 13.
  • all of the metering segments 6 are advantageously pivotally mounted on a support block 7 which is in one piece and which is fixed interchangeably in the rebate 9 of the body 2.
  • This arrangement thus makes it possible to replace the whole of the support block 7 and of the metering segments 6 which it carries, when these metering segments must themselves be replaced by other metering segments, following a prolonged operation having resulted in a wear of the scraping edges 6b.
  • the pivot axis of the metering segments 6 is advantageously embodied by the rod 13 housed in facing grooves provided in the support block 7 and in the dosing segments 6.
  • each pusher 14 could also be coupled to the associated metering segments by means of a connection mechanism ensuring positive control of the slack pivoting elements of the metering segment 6 in both directions, to permanently maintain contact between the metering segment 6 and the end of the plunger 14.
  • each metering segment 6 has, on one of its lateral faces, a slight clearance 6e, of a few tenths of a millimeter in depth or in width in the direction of alignment of the metering segments, therefore in a direction parallel to the 'axis of the cylinder and the hinge axis 13 ( Figure 3).
  • Each clearance extends only below the hinge axis 13 and it does not reach the upper face 6a of the segment which constitutes an extension of the bottom of the inkwell towards the cylinder 1.
  • This clearance 6e makes it possible to reduce the friction between the segments 6, therefore the force on each pusher 14, while ensuring the tightness with respect to the ink between the different segments 6 because the upper parts which are not released, lack the clearance 6e, rub against each other.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

An ink fountain for a printing machine comprises metering segments individually adjustable to adjust the thickness of the film of ink formed between them and the inking roller. To facilitate assembly of the metering segments and to avoid infiltration of ink, the common pivot axis of the metering segments is constituted by a rod maintained clamped between aligned horizontal grooves in the various adjacent metering segments and a horizontal groove in a support of the metering segments fast with the body of the ink fountain.

Description

La présente invention concerne un encrier à segments doseurs réglés individuellement pour une imprimeuse, selon le préambule de la revendication 1 (DE-A-3 047 689).The present invention relates to an inkwell with metering segments individually adjusted for a printer, according to the preamble of claim 1 (DE-A-3 047 689).

On connaît déjà des encriers pour imprimeuse qui comportent un bac contenant de l'encre, ce bac étant délimité, d'un côté, par un cylindre encrier horizontal entraîné en rotation, du côté opposé, par un corps s'étendant parallèlement au cylindre encrier, et latéralement, par deux flasques verticaux. Le corps porte, à proximité immédiate de la surface périphérique du cylindre encrier, une lame de raclage parallèle au cylindre encrier et qui est formée par une succession de segments doseurs adjacents les uns aux autres, et dont les faces frontales sont délimitées, du côté du cylindre encrier, par des arêtes de raclage qui s'étendent parallèlement au cylindre encrier, à une faible distance de la surface périphérique de celui-ci, cette distance pouvant être réglée individuellement pour chaque segment doseur. Les parties extrêmes des segments doseurs qui sont opposés aux faces frontales portant les arêtes de raclage, sont fixées au corps de l'encrier. Les segments doseurs sont actionnés individuellement par des poussoirs s'étendant à travers le corps et qui sont commandés, par exemple, par des manettes de réglage ou des ensembles motorisés. Chacun de ces poussoirs exerce une poussée sur la partie extrême mobile du segment doseur qui lui est associé. Ainsi il est possible, à l'aide de ces poussoirs, de placer l'arête de raclage de chaque segment doseur individuel plus ou moins près de la surface périphérique du cylindre encrier et d'ajuster ainsi l'épaisseur du film d'encre passant entre l'arête de raclage du segment doseur considéré et la surface périphériques du cylindre encrier. Un tel encrier est décrit par exemple dans la demande de brevet français N 83 01945.Inkwells for printing machines are already known which comprise a container containing ink, this container being delimited, on one side, by a horizontal ink cylinder driven in rotation, on the opposite side, by a body extending parallel to the ink cylinder , and laterally, by two vertical flanges. The body carries, in the immediate vicinity of the peripheral surface of the ink cylinder, a scraper blade parallel to the ink cylinder and which is formed by a succession of metering segments adjacent to each other, and the front faces of which are delimited, on the side of the ink cylinder, by scraping edges which extend parallel to the ink cylinder, at a small distance from the peripheral surface thereof, this distance being able to be adjusted individually for each metering segment. The end portions of the metering segments which are opposite to the front faces carrying the scraping edges are fixed to the body of the inkwell. The dosing segments are actuated individually by pushers extending through the body and which are controlled, for example, by adjusting levers or motorized assemblies. Each of these pushers exerts a push on the mobile end part of the metering segment associated with it. Thus it is possible, using these pushers, to place the scraping edge of each individual dosing segment more or less close to the peripheral surface of the ink cylinder and thus to adjust the thickness of the passing ink film. between the scraping edge of the metering segment considered and the peripheral surface of the ink cylinder. Such an inkwell is described for example in French patent application N 83 01945.

Du fait de l'amélioration des performances de l'encrage on a évolué vers un système de prise d'encre en continu qui nécessite des épaisseurs du film d'encre (de l'ordre de 0,3 mm) plus faibles qu'avec le système classique utilisant un cylindre preneur oscillant. Cette faible épaisseur doit pouvoir varier de 0 à 100 % en fonction des conditions nécessaires pour l'encrage. En outre les systèmes modernes de télécommande et d'asservissement nécessitent eux-mêmes une grande précision pour permettre de retomber dans les mêmes conditions initiales. Certaines réalisations connues font appel à un levier qui multiplie le mouvement entre un poussoir et le segment qu'il commande. Dans une solution connue de ce type, telle que décrite dans le brevet DE-A-3 047 689, chaque segment doseur forme un levier du premier genre comportant un premier bras de levier, de petite longueur, entre l'arête de raclage du segment doseur et l'axe de pivotement de celui-ci, et un second bras de levier, de grande longueur, entre le point d'application de l'effort du poussoir sur le segment doseur et l'axe de pivotement.Due to the improvement in ink performance, we have evolved into a continuous ink intake system which requires thicknesses of the ink film (of the order of 0.3 mm) that are less than with the classic system using an oscillating take-up cylinder. This small thickness must be able to vary from 0 to 100% depending on the conditions necessary for inking. In addition, modern remote control and servo systems themselves require great precision to allow them to fall under the same initial conditions. Certain known embodiments use a lever which multiplies the movement between a pusher and the segment which it controls. In a known solution of this type, as described in patent DE-A-3 047 689, each dosing segment forms a lever of the first kind comprising a first lever arm, of small length, between the scraping edge of the segment dispenser and the pivot axis thereof, and a second lever arm, of great length, between the point of application of the force of the plunger on the metering segment and the pivot axis.

Les encriers de ce type connus à ce jour présentent de nombreux inconvénients tels que le risque de pénétration de l'encre entre les segments doseurs et entre eux et le bloc support commun ou les poussoirs. On place, à certains endroits où cela est possible, des joints, sans cependant pouvoir éviter cette pénétration par des dégagements entre les segments doseurs. Cette encre en couche mince sèche, salit et empêche le fonctionnement de l'encrier dans de bonnes conditions en rendant son entretien très difficile.Inkwells of this type known to date have many drawbacks such as the risk of ink penetration between the metering segments and between them and the common support block or the pushers. Seals are placed, in certain places where this is possible, without however being able to avoid this penetration by clearances between the metering segments. This thin layer ink dries, dirty and prevents the inkwell working in good conditions by making its maintenance very difficult.

La présente invention vise à remédier à ces inconvénients en procurant un encrier de conception particulièrement simple, supprimant tous les éléments intermédiaires entre poussoirs et segments et permettant d'obtenir à coup sûr une très grande précision dans le réglage des positions des segments doseurs individuels.The present invention aims to remedy these drawbacks by providing a particularly simple design inkwell, eliminating all the intermediate elements between pushers and segments and making it possible to obtain very precise precision in the adjustment of the positions of the individual metering segments.

A cet effet cet encrier à segments doseur du type mentionné ci-dessus est caractérisé en ce que l'axe de pivotement commun des segments doseurs est constitué par une tige maintenue serrée entre des gorges horizontales alignées des divers segments doseurs adjacents, d'une part, et une gorge horizontale d'un support des segments doseurs solidaire du corps de l'encrier.To this end, this inkwell with metering segments of the type mentioned above is characterized in that the common pivot axis of the metering segments is constituted by a rod held clamped between aligned horizontal grooves of the various adjacent metering segments, on the one hand , and a horizontal groove of a support for the dosing segments secured to the body of the inkwell.

Le montage et le démontage des segments doseurs et des ressorts qui sont accessibles par la partie antérieure de l'encrier, sont beaucoup plus faciles que pour tous les dispositifs similaires connus à ce jour.The assembly and disassembly of the metering segments and springs which are accessible through the front part of the inkwell, are much easier than for all similar devices known to date.

Le recours à des joints pour empêcher l'encre de pénétrer entre les segments doseurs et entre eux et le bloc support commun est supprimé, ce qui est un grand avantage pour l'entretien de la propreté de la machine.The use of seals to prevent ink from entering between the dosing segments and between them and the common support block is eliminated, which is a great advantage for maintaining the cleanliness of the machine.

Selon la présente invention chaque poussoir peut travailler non seulement par poussée sur les segments doseurs, mais éventuellement en traction sur eux, ce qui permet, par des moyens simples et connus, de supprimer éventuellement les ressorts placés entre le bloc commun et les segments doseurs.According to the present invention each pusher can work not only by pushing on the metering segments, but possibly in traction on them, which allows, by simple and known means, possibly to remove the springs placed between the common block and the metering segments.

On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel :

  • La figure 1 est une vue en coupe verticale perpendiculairement à l'axe du cylindre encrier.
  • La figure 2 est une vue en plan partielle de l'encrier, le cylindre encrier et les mécanismes de commande des poussoirs étant enlevés.
  • La figure 3 est une vue de face partielle, prise suivant la flèche F de la figure 1.
An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
  • Figure 1 is a vertical sectional view perpendicular to the axis of the ink cylinder.
  • Figure 2 is a partial plan view of the inkwell, the ink cylinder and the push rod control mechanisms being removed.
  • FIG. 3 is a partial front view, taken along the arrow F in FIG. 1.

L'encrier suivant l'invention qui est représenté sur le dessin comprend un cylindre encrier 1 entraîné en rotation dans le sens de la flèche f, c'est-à-dire dans le sens inverse des aiguilles d'une montre, un corps 2 s'étendant parallèlement à l'axe du cylindre 1 et deux flasques latéraux et verticaux 3. Le cylindre 1, le corps 2 et les deux flasques 3 constituent un bac contenant une réserve d'encre 4 destinée à former, sur la surface périphérique du cylindre encrier 1, un film 5 d'épaisseur réglable.The inkwell according to the invention which is shown in the drawing comprises an ink cylinder 1 driven in rotation in the direction of the arrow f, that is to say in the anticlockwise direction, a body 2 extending parallel lying at the axis of the cylinder 1 and two lateral and vertical flanges 3. The cylinder 1, the body 2 and the two flanges 3 constitute a container containing an ink reserve 4 intended to form, on the peripheral surface of the ink cylinder 1 , a film 5 of adjustable thickness.

L'encrier comporte, pour le réglage de l'épaisseur du film 5, une succession de segments doseurs individuels 6 qui sont sensiblement coplanaires, aussi bien sur leurs faces antérieures que sur leurs faces supérieures, et sont juxtaposés les uns aux autres suivant une direction parallèle à l'axe du cylindre encrier 1, en formant en quelque sorte une lame râcleuse. Chacun de ces segments doseurs individuels 6 est constitué par une plaquette de forme parallélépipédique, qui est maintenue appliquée contre un bloc support commun 7, et ce au moyen d'un ressort 8 traversant des trous percés dans les segments doseurs 6 et le bloc support 7. Ce bloc support 7 se présente sous une forme parallélépipédique et il est fixé sur le corps 2 et plus particulièrement dans une feuillure 9 de celui-ci, au moyen de vis 11. La feuillure 9 comporte une face d'appui inférieure 9a et une face frontale perpendiculaire 9b contre laquelle est plaqué le bloc support 7.The inkwell comprises, for adjusting the thickness of the film 5, a succession of individual metering segments 6 which are substantially coplanar, both on their anterior faces and on their upper faces, and are juxtaposed with each other in a direction parallel to the axis of the ink cylinder 1, in a way forming a scraper blade. Each of these individual dosing segments 6 is constituted by a plate of parallelepiped shape, which is kept applied against a common support block 7, by means of a spring 8 passing through holes drilled in the dosing segments 6 and the support block 7 This support block 7 is in the form of a parallelepiped and it is fixed on the body 2 and more particularly in a rebate 9 thereof, by means of screws 11. The rebate 9 has a lower bearing face 9a and a perpendicular front face 9b against which the support block 7 is pressed.

Chaque segment doseur 6 comprend une face frontale supérieure 6a qui est délimitée, du côté du cylindre encrier 1, par une arête de raclage 6b située à proximité immédiate de la surface périphérique de ce cylindre. Cette arête de raclage 6b peut être aiguë ou bien encore elle peut former un chanfrein de faible largeur. Les divers segments doseurs 6 sont sollicités en direction du bloc support commun 7 par l'intermédiaire de leurs ressorts de fixation 8. Les extrémités de chaque ressort 8 peuvent être respectivement accrochées au bloc support commun 7 et au segment doseur associé 6 par tous moyens appropriés, par exemple au moyen d'axes 8a et 8b logés dans des trous ménagés respectivement dans le bloc support commun 7 et le segment doseur 6.Each metering segment 6 comprises an upper front face 6a which is delimited, on the side of the ink cylinder 1, by a scraping edge 6b situated in the immediate vicinity of the peripheral surface of this cylinder. This scraping edge 6b can be sharp or else it can form a chamfer of small width. The various metering segments 6 are biased towards the common support block 7 by means of their fixing springs 8. The ends of each spring 8 can be respectively hooked to the common support block 7 and to the associated metering segment 6 by any appropriate means. , for example by means of axes 8a and 8b housed in holes made respectively in the common support block 7 and the metering segment 6.

Chaque segment doseur 6 présente, dans la partie supérieure de sa face interne gauche 6c, c'est-à-dire au-dessus du ressort 8, une gorge horizontale 6d, à section droite en V, toutes les gorges horizontales 6d étant situés à la même hauteur et par conséquent alignées. En regard de la gorge 6d des divers segments doseurs 6 s'étend, dans la partie supérieure de la face externe droite du support 7, une gorge horizontale 7b. Entre cette gorge commune 7b d'une part et les gorges alignées 6d des divers segments doseurs 6 d'autre part est logée une tige 13 constituant un axe de pivotement commun pour tous les segments doseurs individuels 6. Du fait de la très forte pression qu'exercent, sous l'action des ressorts 8, les segments doseurs 6 sur la tige 13 constituant l'axe de pivotement commun de ces segments doseurs, cette tige forme un barrage étanche à l'encontre de tout écoulement éventuel de l'encre vers le bas.Each metering segment 6 has, in the upper part of its left internal face 6c, that is to say above the spring 8, a horizontal groove 6d, with a V-shaped cross section, all the horizontal grooves 6d being located at the same height and therefore aligned. Opposite the groove 6d of the various metering segments 6 extends, in the upper part of the right external face of the support 7, a horizontal groove 7b. Between this common groove 7b on the one hand and the aligned grooves 6d of the various metering segments 6 on the other hand is housed a rod 13 constituting a common pivot axis for all the individual metering segments 6. Due to the very high pressure that 'exert, under the action of the springs 8, the metering segments 6 on the rod 13 constituting the common pivot axis of these metering segments, this rod forms a tight barrier against any possible flow of ink towards the bottom.

La partie inférieure de la face interne gauche 6c de chaque segment doseur 6 est pressée, sous l'action du ressort 8 tendant à faire pivoter le segment 6 dans le sens des aiguilles d'une montre autour de la tige 13, contre l'extrémité d'un poussoir de réglage 14. Chaque poussoir 14 est mobile axialement dans un trou 15 percé de part en part dans le corps 2 et dans un trou coaxial 16, formant guidage, percé de part en part dans la partie inférieure du bloc support commun 7. Le poussoir 14 fait saillie à l'extérieur par rapport au trou 16 et il prend appui à cet endroit, par son extrémité, contre la face interne 6c du segment 6, c'est-à-dire celle qui est tournée vers le bloc support 7. L'autre extrémité du poussoir 14 est actionnée en translation par un moyen quelconque tel qu'un excentrique de réglage qui peut être entraîné en rotation, d'une manière connue en soi, par une manette par exemple, soit par tout autre dispositif manuel ou motorisé. Un dispositif de commande 17 du type motorisé, comportant un moteur 18 et un mécanisme de transmission de mouvement 19, est représenté monté à l'extérieur du corps 2, sur la figure 1. La rotation du moteur 18, dans un sens ou dans l'autre, provoque par conséquent un mouvement axial du poussoir 14 qui repousse ainsi plus ou moins la partie extrême du segment doseur individuel 6 auquel il est associé. Ce dernier, qui constitue en quelque sorte un levier du premier genre, pivote autour de l'axe supérieur formé par la tige 13. Comme le bras de levier supérieur, défini entre l'axe de pivotement 13 et l'arête de raclage 6b, est nettement plus court que le bras de levier inférieur défini entre l'axe de pivotement 13 et le point d'application de l'effort exercé par le poussoir 14 sur le segment 6, il en résulte une démultiplication du mouvement de l'arête de raclage 6b par rapport à celui du poussoir 14. De cette façon il est possible d'ajuster avec une très grande précision l'intervalle délimité entre l'arête de raclage 6b du segment individuel 6 et la surface périphérique du cylindre encrier 1, et de régler par conséquent d'une manière très fine l'épaisseur du film d'encre 5.The lower part of the left internal face 6c of each metering segment 6 is pressed, under the action of the spring 8 tending to rotate the segment 6 in a clockwise direction around the rod 13, against the end an adjustment pusher 14. Each pusher 14 is axially movable in a hole 15 drilled right through in the body 2 and in a coaxial hole 16, forming a guide, drilled right through in the lower part of the common support block 7. The pusher 14 protrudes outside with respect to the hole 16 and it bears at this point, at its end, against the internal face 6c of the segment 6, that is to say that which faces towards the support block 7. The other end of the pusher 14 is actuated in translation by any means such as an adjustment eccentric which can be driven in rotation, in a manner known per se, by a lever for example, or by any other manual or motorized device. A control device 17 of the motorized type, comprising a motor 18 and a movement transmission mechanism 19, is shown mounted outside the body 2, in FIG. 1. The rotation of the motor 18, in one direction or in the 'other, therefore causes an axial movement of the pusher 14 which thus pushes more or less the end part of the individual metering segment 6 with which it is associated. The latter, which in a way constitutes a lever of the first kind, pivots around the upper axis formed by the rod 13. Like the upper lever arm, defined between the pivot axis 13 and the scraping edge 6b, is significantly shorter than the lower lever arm defined between the pivot axis 13 and the point of application of the force exerted by the pusher 14 on the segment 6, this results in a reduction in the movement of the edge of scraping 6b relative to that of the pusher 14. In this way it is possible to adjust with very great precision the interval defined between the scraping edge 6b of the individual segment 6 and the peripheral surface of the ink cylinder 1, and therefore adjust the thickness of the ink film 5 very finely.

Ainsi qu'il ressort de la description qui précède tous les segments doseurs 6 sont avantageusement montés à pivotement sur un bloc support 7 qui est d'une seule pièce et qui est fixé d'une manière interchangeable dans la feuillure 9 du corps 2. Cette disposition permet ainsi de remplacer l'ensemble du bloc support 7 et des segments doseurs 6 qu'il porte, lorsque ces segments doseurs doivent être eux-mêmes remplacés par d'autres segments doseurs, à la suite d'un fonctionnement prolongé ayant entraîné une usure des arêtes de raclage 6b. Par ailleurs, dans la forme d'éxécution non limitative de l'invention qui a été décrite précédemment, l'axe de pivotement des segments doseurs 6 est avantageusement matérialisé par la tige 13 logée dans des gorges en regard prévues dans le bloc support 7 et dans les segments doseurs 6.As is apparent from the foregoing description, all of the metering segments 6 are advantageously pivotally mounted on a support block 7 which is in one piece and which is fixed interchangeably in the rebate 9 of the body 2. This arrangement thus makes it possible to replace the whole of the support block 7 and of the metering segments 6 which it carries, when these metering segments must themselves be replaced by other metering segments, following a prolonged operation having resulted in a wear of the scraping edges 6b. Furthermore, in the non-limiting embodiment of the invention which has been described above, the pivot axis of the metering segments 6 is advantageously embodied by the rod 13 housed in facing grooves provided in the support block 7 and in the dosing segments 6.

L'extrémité de chaque poussoir 14 pourrait être également accouplée aux segments doseurs associés par l'intermédiaire d'un mécanisme de liaison assurant une commande positive des mouvements de pivotement du segment doseur 6 dans les deux sens, pour maintenir en permanence le contact entre le segment doseur 6 et l'extrémité du poussoir 14.The end of each pusher 14 could also be coupled to the associated metering segments by means of a connection mechanism ensuring positive control of the slack pivoting elements of the metering segment 6 in both directions, to permanently maintain contact between the metering segment 6 and the end of the plunger 14.

De préférence chaque segment doseur 6 présente, sur l'une de ses faces latérales, un léger dégagement 6e, de quelques dixièmes de millimètres de profondeur ou de largeur dans le sens de l'alignement des segments doseurs, donc dans un sens parallèle à l'axe du cylindre et à l'axe d'articulation 13 (figure 3). Chaque dégagement ne s'étend qu'en dessous de l'axe d'articulation 13 et il n'atteint pas la face supérieure 6a du segment qui constitue un prolongement du fond de l'encrier vers le cylindre 1. Ce dégagement 6e permet de diminuer les frottements entre les segments 6, donc l'effort sur chaque poussoir 14, tout en assurant l'étanchéité à l'égard de l'encre entre les différents segments 6 du fait que les parties supérieures non dégagées, dépourvues du dégagement 6e, frottent les unes contre les autres.Preferably each metering segment 6 has, on one of its lateral faces, a slight clearance 6e, of a few tenths of a millimeter in depth or in width in the direction of alignment of the metering segments, therefore in a direction parallel to the 'axis of the cylinder and the hinge axis 13 (Figure 3). Each clearance extends only below the hinge axis 13 and it does not reach the upper face 6a of the segment which constitutes an extension of the bottom of the inkwell towards the cylinder 1. This clearance 6e makes it possible to reduce the friction between the segments 6, therefore the force on each pusher 14, while ensuring the tightness with respect to the ink between the different segments 6 because the upper parts which are not released, lack the clearance 6e, rub against each other.

Claims (5)

1. An ink fountain incorporating individually adjusted metering segments, for a printing machine, comprising a vat containing ink and defined on one side by a horizontal inking roller (1) driven in rotation and, on the other side, by a body (2) extending parallel to the inking roller, as well as by two vertical, lateral cheeks (3), the body (2) of the ink fountain bearing, in the vicinity of the peripheral surface of the inking roller (1), a series of metering segments (6) aligned parallel to the inking roller (1) and of which the front faces close to the inking roller (1) are defined, on that roller side, by wiping edges (6b) parallel to the inking roller and which determine, with the peripheral surface of the inking roller (1), gaps of width which is adjustable as a function of the thickness of the film of ink having to be formed on the inking roller (1), downstream of each metering segment (6), adjusting pusher members (14) mounted to slide in the body (2) and acting against springs (8) on the individual metering segments (6), and means associated respectively with the various pusher members (14) for displacing the latter more or less as a function of the desired thickness of the film of ink, all the metering segments (6) being mounted to pivot about a common axis parallel to the inking roller (1), each metering segment (6) forming a lever of the first type comprising a first lever arm, of short length between the point of application of the effort of the pusher member (14) on the metering segment (6) and the pivot axis, the common pivot axis of the metering segments (6) being constituted by a rod (13) maintained clamped between aligned horizontal grooves (6d) of the various adjacent metering segments (6) on the one hand, and a horizontal groove (7b) of a support (7) of the metering segments (6) fast with the body (2) of the ink fountain.
2. An ink fountain according to claim 1, wherein each metering segment (6) is urged in the direction of the common support (7) by a spring (8) passing through a hole made in the metering segment (6) and a hole made in the support (7).
3. An inkfountain according to claim 2, wherein the ends of each spring (8) are respectively hooked by means of pins (8a, 8b) housed in holes made respectively in the common support unit (7) and the associated metering segment (6).
4. An inkfountain according to claim 1, wherein the rod (13) forms a tight barrier against any downward flow of ink between the metering segments (6) and the common support unit (7).
5. An inkfountain according to claim 1, wherein each metering segment (6) presents, on one of its lateral faces, a slight clearance (6e), some tenths of millimeter in depth or width in the direction of alignment of the metering segments (6), this slight clearance (6e) extending beneath the pivot axis (13) of the metering segments (6) of which the non-open upper parts rub against one another.
EP86400599A 1985-03-22 1986-03-21 Inking unit with independently adjustable ink measuring sections Expired EP0195727B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400599T ATE39885T1 (en) 1985-03-22 1986-03-21 INKING UNIT WITH INDIVIDUALLY ADJUSTABLE DOSING ELEMENTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8504283A FR2579136B1 (en) 1985-03-22 1985-03-22 INK TO INDIVIDUALLY ADJUSTABLE DOSER SEGMENTS FOR A PRINTER
FR8504283 1985-03-22

Publications (2)

Publication Number Publication Date
EP0195727A1 EP0195727A1 (en) 1986-09-24
EP0195727B1 true EP0195727B1 (en) 1989-01-11

Family

ID=9317472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400599A Expired EP0195727B1 (en) 1985-03-22 1986-03-21 Inking unit with independently adjustable ink measuring sections

Country Status (6)

Country Link
US (1) US4711176A (en)
EP (1) EP0195727B1 (en)
JP (1) JPS61220850A (en)
AT (1) ATE39885T1 (en)
DE (1) DE3661700D1 (en)
FR (1) FR2579136B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112032U1 (en) * 1991-09-23 1993-01-28 Zimmer, Johannes, Klagenfurt, Kärnten Squeegee device

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Publication number Priority date Publication date Assignee Title
US5127326A (en) * 1991-04-26 1992-07-07 Cra-Tek Industrial Controls, Inc. Ink key control apparatus
JP2007237539A (en) * 2006-03-08 2007-09-20 Komori Corp Ink fountain apparatus of printing machine
CN102009524B (en) 2009-07-20 2014-07-23 海德堡印刷机械股份公司 Metering unit for ink duct of lithographic offset printing machine
CN101954784B (en) 2009-07-20 2014-01-01 海德堡印刷机械股份公司 Dosing device of printing press and ink fountain

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Publication number Priority date Publication date Assignee Title
US3699888A (en) * 1971-09-13 1972-10-24 North American Rockwell Composite fountain blade construction for remote ink control system
US4170177A (en) * 1977-04-07 1979-10-09 Toshiba Kikai Kabushiki Kaisha Printing machine inking device with plurality of cam levers
JPS5692068A (en) * 1979-12-27 1981-07-25 Toshiba Mach Co Ltd Controller for discharge of ink
DE3033997A1 (en) * 1980-09-10 1982-04-15 Koenig & Bauer AG, 8700 Würzburg INKBOX FOR PRINTING MACHINES
DD201007A1 (en) * 1981-08-31 1983-06-29 Arndt Jentzsch DEVICE FOR ADJUSTING THE COLOR METER TO COLOR CHAMPS OF PRINTING MACHINES
DE3203500C2 (en) * 1982-02-03 1988-03-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Inking knife and an adjusting device for an inking knife
DE3239259C2 (en) * 1982-10-23 1985-04-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Device for zone-wise metering of ink on the ink fountain roller of an inking unit for printing machines
FR2540434A1 (en) * 1983-02-08 1984-08-10 Chambon Machines INPUT SEGMENTS DOSERS RULES INDIVIDUALLY FOR AN PRINTER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112032U1 (en) * 1991-09-23 1993-01-28 Zimmer, Johannes, Klagenfurt, Kärnten Squeegee device

Also Published As

Publication number Publication date
JPH0572875B2 (en) 1993-10-13
ATE39885T1 (en) 1989-01-15
FR2579136A1 (en) 1986-09-26
FR2579136B1 (en) 1988-03-11
US4711176A (en) 1987-12-08
DE3661700D1 (en) 1989-02-16
JPS61220850A (en) 1986-10-01
EP0195727A1 (en) 1986-09-24

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