EP0883492B1 - Adjusting device for printing machine doctor blade - Google Patents
Adjusting device for printing machine doctor blade Download PDFInfo
- Publication number
- EP0883492B1 EP0883492B1 EP97947117A EP97947117A EP0883492B1 EP 0883492 B1 EP0883492 B1 EP 0883492B1 EP 97947117 A EP97947117 A EP 97947117A EP 97947117 A EP97947117 A EP 97947117A EP 0883492 B1 EP0883492 B1 EP 0883492B1
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- EP
- European Patent Office
- Prior art keywords
- doctor blade
- printing roller
- axis
- cylinder
- printing
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/08—Wiping mechanisms
- B41F9/10—Doctors, scrapers, or like devices
- B41F9/1036—Clamping and adjusting devices
Definitions
- the present invention relates to a device for setting the doctor blades used in the machines rotogravure printing.
- doctor blade angle the angle formed by the plane of the doctor blade with the surface of the cylinder
- nip the distance between the application area of the doctor blade and the printing area
- any machine rotogravure type printing must allow ensure three basic settings, namely first share the setting of "nip”, second share the setting of the doctor blade angle, and thirdly the adjustment of the position of the doctor blade on the cylinder according to the different diameters of it.
- the object of the present invention is to provide a type adjustment device in which the modification of certain settings does not entail imperatively the modification of others.
- the modification of the nip and the changing the radius of the print cylinder will no influence on the squeegee angle, which prevents previously mentioned problems related to the wear of the squeegee.
- the present invention thus makes it possible to wear three days to seven days, for conditions of otherwise equal operation, the duration using a doctor blade.
- the subject of the present invention is therefore a device for adjusting a doctor blade in contact with a printing cylinder following a generator thereof, of the type in which the doctor blade rotates around the printing cylinder which is centered on the axis of rotation of the latter and the doctor blade is mounted on a mobile equipment able, on the one hand, to move in a plane perpendicular to the axis of the impression cylinder so make a movement of translation in a direction which is substantially parallel to a radial axis to the printing cylinder, and which passes through a point of contact of the doctor blade with this last, the moving assembly being linked to a slide which is mounted in displacement in a slide whose the axis is substantially parallel to said radial axis, and, on the other hand, to make it perform a rotational movement around said generator, characterized in that the latter movement is obtained by means of an articulated parallelogram, of which a first branch is made up of part of the slide between two articulations thereof, the crew being rotatably mounted at the end free
- the slide is itself secured to support means sliding mounted in a second slide circular centered on the axis of rotation of the cylinder printing.
- the slide has a shape such that in each of its points the product of the angle of nip by the radius of the impression cylinder is a constant equal to the nip wish.
- FIG. 1 shows a cylinder printing 3 on the external surface of which a web printed 4 is applied by a counterpart cylinder 6.
- the adjustment device according to the invention is intended for positioning a doctor blade 1 by relation to impression cylinder 3 of radius r, according to a generator thereof, represented on the figures by point F.
- the device according to the invention comprises a circular slide 5 whose center is formed by the center O of the printing cylinder 3, in which moves a slide 7.
- This slide 7 comprises itself a rectilinear slide 9 of axis xx 'which is parallel to the right passing through the center O of impression cylinder 3 and the contact point F of the doctor blade 1 on this cylinder.
- a slide 11 is mounted at sliding in the slide 9.
- This slide 11 has two joints A and B which form between they a base branch 14a, or lower branch of a parallelogram 14 of vertices ABCD, comprising by elsewhere an opposite or upper branch 14b articulated at its ends C and D on a first internal lateral branch 14c and a second branch lateral lateral 14d.
- the upper branch 14b is extends, towards cylinder 3, by a branch 15 at the end of which a crew 17 is mounted articulated around an E joint.
- Pressing means which can for example be constituted by a hydraulic cylinder 19, make it possible to keep the active end of the doctor blade 1 applied against the external surface of the printing cylinder 3 at a point F situated at the intersection of the radial axis xx 'of the slide 11 with the cylinder 3. Furthermore, the distance separating the articulation B of the slide 11 from the point F is adjusted to a value d equal to the length of the branch 15 which extends the upper branch 14b of the parallelogram 14. A second parallelogram is thus constituted, the vertices of which are formed by the BCEF joints.
- the slide 11 When it is desired to change the printing cylinder 3, which amounts to varying the radius r thereof, the slide 11 is moved in the rectilinear slide 9 so as to bring the doctor blade 1 into contact with the external surface of the new printing cylinder of radius r ', while maintaining the distance separating the articulation B from the point of contact F of the doctor blade 1 with the external surface of the cylinder 3 at a constant value equal to the length d of the branch 15 of the BCEF parallelogram. Under these conditions, this displacement does not in any way modify the doctor blade angle ⁇ . It will be noted however that, in this embodiment, as can be seen in diagrammatic figure 2, such a radial displacement has the effect of slightly modifying the value l of the pin.
- the present invention allows to act on any of the three parameters essentials for setting a doctor blade on a cylinder without affecting this setting other parameters concerned.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
Description
La présente invention concerne un dispositif de réglage des racles utilisées dans les machines d'impression en héliogravure.The present invention relates to a device for setting the doctor blades used in the machines rotogravure printing.
On sait que le principe d'impression par héliogravure consiste à creuser, sur la périphérie des cylindres d'impression, des alvéoles qui reproduisent le signe que l'on souhaite imprimer, à remplir d'encre ces alvéoles et à les appliquer fortement contre une feuille à imprimer au moyen d'un cylindre contrepartie, de façon que celle-ci puisse extraire l'encre contenue dans les alvéoles. Afin d'obtenir une qualité d'impression constante on contrôle la quantité d'encre contenue dans les alvéoles en arasant la surface du cylindre au moyen d'une racle.We know that the principle of printing by rotogravure consists in digging, on the periphery of impression cylinders, cells that reproduce the sign you want to print, to fill with ink these cells and apply them strongly against a sheet to be printed using a counterpart cylinder, so that it can extract the ink contained in the alveoli. In order to obtain quality constant printing we control the quantity of ink contained in the alveoli by leveling the surface of the cylinder by means of a doctor blade.
On sait que la qualité de l'impression dépend de nombreux facteurs, et notamment parmi ceux-ci, de l'angle formé par le plan de la racle avec la surface du cylindre (dit ci-après angle de racle) et de la distance existant entre la zone d'application de la racle et la zone d'impression, désignée ci-après par le mot nip. En effet de cette distance, qui doit être réglable, dépend le degré de séchage de l'encre déposée sur la feuille à imprimer, degré de séchage qui influe, comme on le comprend aisément, sur la qualité de l'impression.We know that the quality of printing depends on many factors, including among them, of the angle formed by the plane of the doctor blade with the surface of the cylinder (hereinafter referred to as doctor blade angle) and of the distance between the application area of the doctor blade and the printing area, hereinafter designated by the word nip. Indeed of this distance, which must be adjustable, depends on the degree of drying of the ink deposited on the sheet to be printed, degree of drying which influences, as we can easily understand, on the quality of the impression.
On sait également, qu'en fonction des différents types d'impression réalisés sur une même machine on utilise des cylindres d'impression de diamètres différents.We also know that depending on the different types of printing performed on the same machine uses diameter printing cylinders different.
Dans ces conditions, on comprend que toute machine d'impression de type héliogravure doit permettre d'assurer trois réglages de base, à savoir de première part le réglage du "nip", de seconde part le réglage de l'angle de racle, et de troisième part le réglage de la position de la racle sur le cylindre en fonction des différents diamètres de celui-ci.Under these conditions, we understand that any machine rotogravure type printing must allow ensure three basic settings, namely first share the setting of "nip", second share the setting of the doctor blade angle, and thirdly the adjustment of the position of the doctor blade on the cylinder according to the different diameters of it.
Dans les machines à imprimer par héliogravure de l'état antérieur de la technique ces trois réglages sont obtenus par des moyens qui, notamment, font effectuer à la racle un mouvement suivant deux axes orthogonaux, à savoir un mouvement vertical et un mouvement horizontal qui sont suivis d'un mouvement de rotation de celle-ci.In rotogravure printing machines the prior art these three adjustments are obtained by means which, in particular, make perform a squeegee movement along two axes orthogonal, namely a vertical movement and a horizontal movement which are followed by a movement of rotation of it.
De tels dispositifs sont particulièrement difficiles et longs à régler puisque les trois paramètres sont dépendants les uns des autres, si bien que l'on ne peut modifier l'un d'eux sans automatiquement modifier les deux autres. L'opérateur est ainsi contraint d'effectuer son réglage par itérations successives, plus ou moins par tâtonnements. On comprend que l'expérience de la personne chargée du réglage est fondamentale, si bien que de tels dispositifs de réglage ne peuvent être mis en oeuvre que par un personnel hautement qualifié. Par ailleurs de tels dispositifs rendent quasi impossible la mise en oeuvre des réglages de la racle par voie automatique.Such devices are particularly difficult and long to settle since the three parameters are dependent on each other as well that one cannot be changed without automatically change the other two. The operator is thus forced to adjust by successive iterations, more or less by trial and error. We understand that the experience of the person responsible for setting is fundamental, so that such adjustment devices cannot be used only by highly qualified personnel. otherwise such devices make it almost impossible to apply automatic doctor blade adjustments.
De plus on sait, qu'après modification de l'angle de racle, l'extrémité de celle-ci doit s'user afin de se conformer de façon parfaite à la surface externe du cylindre d'impression. Ceci présente deux inconvénients majeurs à savoir : d'une part on use inutilement la racle, et d'autre part les impressions réalisées pendant la mise en forme de celle-ci sont d'une qualité amoindrie.We also know that after changing the angle doctor blade, the end of the blade must wear out in order to conform perfectly to the external surface of the printing cylinder. This has two drawbacks major to know: on the one hand we use the scrapes, and on the other hand the impressions made during the shaping thereof are of a quality diminished.
On connaít enfin par le brevet DE-A-4024569, un dispositif de réglage d'une racle qui est maintenue en contact avec un cylindre d'impression d'une machine à imprimer, dans lequel la racle est susceptible d'être animée d'un mouvement de rotation centré sur le centre du cylindre d'impression et d'un mouvement de translation suivant une droite passant par le centre de celui-ci et par l'extrémité de la racle, ainsi que d'un mouvement de rotation autour de sa zone de contact avec le cylindre d'impression.We finally know from patent DE-A-4024569, a device for adjusting a doctor blade which is held in contact with a printing cylinder of a print, in which the doctor blade is likely to be driven by a rotation movement centered on the center of the printing cylinder and a movement of translation along a straight line passing through the center of this one and by the end of the doctor blade, as well as a rotational movement around its contact area with the printing cylinder.
La présente invention a pour but de proposer un dispositif de réglage du type dans lequel la modification de certains réglages n'entraíne pas impérativement la modification des autres. Ainsi la modification du nip et la modification du rayon du cylindre d'impression n'auront aucune influence sur l'angle de racle, ce qui évite les problèmes précédemment mentionnés liés à l'usure de la racle. La présente invention permet ainsi de porter de trois jours à sept jours, pour des conditions de fonctionnement égales par ailleurs, la durée d'utilisation d'une racle.The object of the present invention is to provide a type adjustment device in which the modification of certain settings does not entail imperatively the modification of others. Thus the modification of the nip and the changing the radius of the print cylinder will no influence on the squeegee angle, which prevents previously mentioned problems related to the wear of the squeegee. The present invention thus makes it possible to wear three days to seven days, for conditions of otherwise equal operation, the duration using a doctor blade.
Certaines variantes de mise en oeuvre de l'invention permettent par ailleurs de rendre complètement indépendants les uns des autres les trois réglages précités.Certain implementation variants of the invention also make it possible to make completely independent of each other the three aforementioned settings.
Dans ces conditions, si la machine est munie de moyens de mesure classiques permettant de connaítre la valeur de chacun des paramètres réglés, les réglages peuvent être mis en oeuvre facilement et rapidement, au besoin par des moyens automatisés, sans qu'il soit nécessaire pour cela de faire appel à un personnel hautement qualifié. De plus, ces valeurs de réglage propres à un travail spécifique peuvent être conservées, de façon à être facilement reproduites pour un travail identique, voire adaptées pour un travail différent.Under these conditions, if the machine is equipped with conventional measurement means making it possible to know the value of each of the parameters set, the settings can be implemented quickly and easily, need by automated means, without it being necessary for this to call on a staff highly qualified. In addition, these setting values specific to a specific job can be preserved, so that they can be easily reproduced for identical work, even suitable for work different.
La présente invention a ainsi pour objet un dispositif de réglage d'une racle en contact avec un cylindre d'impression suivant une génératrice de celui-ci, du type dans lequel la racle effectue un mouvement de rotation autour du cylindre d'impression qui est centré sur l'axe de rotation de ce dernier et la racle est montée sur un équipage mobile apte, d'une part, à se déplacer dans un plan perpendiculaire à l'axe du cylindre d'impression afin d'y effectuer un mouvement de translation suivant une direction qui est sensiblement parallèle à un axe radial au cylindre d'impression, et qui passe par un point de contact de la racle avec ce dernier, l'équipage mobile étant lié à un coulisseau qui est monté à déplacement dans une glissière dont l'axe est sensiblement parallèle audit axe radial, et, d'autre part, à lui faire effectuer un mouvement de rotation autour de ladite génératrice, caractérisé en ce que ce dernier mouvement est obtenu au moyen d'un parallélogramme articulé, dont une première branche est constituée par une partie du coulisseau comprise entre deux articulations de celui-ci, l'équipage étant monté à rotation à l'extrémité libre d'une branche support située dans le prolongement d'une seconde branche du parallélogramme opposée à la première branche, dont la longueur est égale à la distance séparant l'articulation la plus proche du cylindre de la surface de celui-ci, le dispositif comportant des moyens aptes à exercer sur l'équipage un effort qui applique la racle sur la surface du cylindre d'impression.The subject of the present invention is therefore a device for adjusting a doctor blade in contact with a printing cylinder following a generator thereof, of the type in which the doctor blade rotates around the printing cylinder which is centered on the axis of rotation of the latter and the doctor blade is mounted on a mobile equipment able, on the one hand, to move in a plane perpendicular to the axis of the impression cylinder so make a movement of translation in a direction which is substantially parallel to a radial axis to the printing cylinder, and which passes through a point of contact of the doctor blade with this last, the moving assembly being linked to a slide which is mounted in displacement in a slide whose the axis is substantially parallel to said radial axis, and, on the other hand, to make it perform a rotational movement around said generator, characterized in that the latter movement is obtained by means of an articulated parallelogram, of which a first branch is made up of part of the slide between two articulations thereof, the crew being rotatably mounted at the end free of a support branch located in the extension of a second branch of the parallelogram opposite the first branch, whose length is equal to the distance from the nearest joint to cylinder from the surface of it the device comprising means capable of exerting on the crew a force which applies the doctor blade on the surface of the cylinder printing.
Dans un mode de mise en oeuvre de l'invention la glissière est elle-même solidaire de moyens support montés coulissants dans une seconde glissière circulaire centrée sur l'axe de rotation du cylindre d'impression.In one embodiment of the invention the slide is itself secured to support means sliding mounted in a second slide circular centered on the axis of rotation of the cylinder printing.
Dans un autre mode de mise en oeuvre de l'invention, qui permet de rendre complètement indépendants les uns des autres les trois réglages précités, la glissière a une forme telle qu'en chacun de ses points le produit de l'angle de nip par le rayon du cylindre d'impression est une constante égale au nip souhaité.In another embodiment of the invention, which makes it possible to make completely independent of each other the three settings above, the slide has a shape such that in each of its points the product of the angle of nip by the radius of the impression cylinder is a constant equal to the nip wish.
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 :
On a représenté sur la figure 1 un cylindre
d'impression 3 sur la surface externe duquel une nappe
imprimée 4 est appliquée par un cylindre contrepartie
6. Le dispositif de réglage suivant l'invention est
destiné à réaliser le positionnement d'une racle 1 par
rapport au cylindre d'impression 3 de rayon r, suivant
une génératrice de celui-ci, représentée sur les
figures par le point F.FIG. 1 shows a cylinder
printing 3 on the external surface of which a web
printed 4 is applied by a
Le dispositif suivant l'invention comprend une
glissière circulaire 5 dont le centre est constitué par
le centre O du cylindre d'impression 3, dans laquelle
se déplace un coulisseau 7. Ce coulisseau 7 comporte
lui-même une glissière 9 rectiligne d'axe xx' qui est
parallèle à la droite passant par le centre O du
cylindre d'impression 3 et le point de contact F de la
racle 1 sur ce cylindre. Un coulisseau 11 est monté à
coulissement dans la glissière 9. Ce coulisseau 11
comporte deux articulations A et B qui forment entre
elles une branche de base 14a, ou branche inférieure
d'un parallélogramme 14 de sommets ABCD, comportant par
ailleurs une branche opposée ou supérieure 14b
articulée à ses extrémités C et D sur une première
branche latérale interne 14c et une seconde branche
latérale externe 14d. La branche supérieure 14b se
prolonge, en direction du cylindre 3, par une branche
15 à l'extrémité de laquelle un équipage 17 est monté
articulé autour d'une articulation E.The device according to the invention comprises a
Des moyens presseurs, qui peuvent par exemple être
constitués par un vérin hydraulique 19, permettent de
maintenir l'extrémité active de la racle 1 appliquée
contre la surface externe du cylindre d'impression 3 en
un point F situé à l'intersection de l'axe radial xx'
du coulisseau 11 avec le cylindre 3. Par ailleurs, on
règle la distance séparant l'articulation B du
coulisseau 11 du point F à une valeur d égale à la
longueur de la branche 15 qui prolonge la branche
supérieure 14b du parallélogramme 14. On constitue
ainsi un second parallélogramme dont les sommets sont
constitués par les articulations BCEF.Pressing means, which can for example be constituted by a
Dans ces conditions le présent dispositif de réglage fonctionne ainsi que décrit ci-après.Under these conditions the present device setting works as described below.
Lorsque l'on souhaite modifier le nip, c'est-à-dire
la distance FG séparant la zone de raclage, figurée sur
la figure 1 par le point F, de la zone d'impression,
figurée sur la figure 1 par le point G, et dont la
longueur est l=FG=r.β (l'angle β étant l'angle FOG), on
fait coulisser le coulisseau 7 dans la glissière
circulaire 5 de l'angle Δβ requis dans le sens
souhaité. Un tel déplacement ne modifie en rien la
distance d séparant l'articulation B de la zone de
contact F de la racle 1 avec la surface du cylindre 3,
ni la valeur γ de l'angle de racle.When it is desired to modify the pin, that is to say the distance FG separating the scraping zone, shown in FIG. 1 by the point F, from the printing zone, shown in FIG. 1 by the point G, and whose length is l = FG = r.β (the angle β being the angle FOG), the slide 7 is made to slide in the
Lorsque l'on souhaite changer le cylindre
d'impression 3, ce qui revient à faire varier le rayon
r de celui-ci, on déplace le coulisseau 11 dans la
glissière rectiligne 9 de façon à amener la racle 1 au
contact de la surface externe du nouveau cylindre
d'impression de rayon r', tout en maintenant la
distance séparant l'articulation B du point de contact
F de la racle 1 avec la surface externe du cylindre 3
à une valeur constante égale à la longueur d de la
branche 15 du parallélogramme BCEF. Dans ces conditions
ce déplacement ne modifie donc en rien l'angle de racle
γ. On notera cependant que, dans ce mode de mise en
oeuvre, ainsi qu'on peut le constater sur la figure
schématique 2, un tel déplacement radial a pour effet
de modifier légèrement la valeur l du nip. When it is desired to change the printing cylinder 3, which amounts to varying the radius r thereof, the
En effet, lorsque le rayon du cylindre d'impression 3 passe d'une valeur r à différentes valeurs r1,r2 .. rn, le nip varie quant à lui de façon proportionnelle à ce rayon et prend ainsi des valeurs successives l1=r1β, l2=r2β, ln=rnβ (figure 2). In fact, when the radius of the printing cylinder 3 changes from a value r to different values r 1 , r 2 .. r n , the nip varies in proportion to this radius and thus takes successive values l 1 = r 1 β, l 2 = r 2 β, l n = r n β (Figure 2).
Dans ces conditions, si l'on reporte (figure 3), à
partir de la droite radiale Oy, lieu des points de
déplacement des zones de contact G1,G2,...Gn du
cylindre d'impression 3 avec le cylindre contrepartie
6, des arcs de même longueur l1,l2...ln égaux au nip,
on obtient un lieu de points F1;F2...Fn qui
représentent les points de contact de la racle 1 avec
le cylindre d'impression 3 pour lesquels le nip est
constant. A chacun de ces points correspond un angle de
nip respectif β1=l/r1; β2=l/r2; ..; βn=l/rn. Si l'on
représente en coordonnées polaires l'équation r.β=l=
constante, dans laquelle on prend le centre O du
cylindre 3 comme centre, on obtient une courbe du type
de la courbe S représentée sur la figure 3, lieu des
points F1;F2;...Fn . Dans ces conditions, si on donne à
la glissière 9 une telle forme, le déplacement du
parallélogramme ABCD se fera suivant cette courbe,
ainsi donc que son homologue dans le parallélogramme
BCEF, à savoir le point de contact F de la racle 1 sur
le cylindre d'impression 3. En conséquence le
déplacement du coulisseau 11 dans la glissière 9 n'aura
aucune influence sur le nip.Under these conditions, if we refer (Figure 3), from the radial line Oy, place of the displacement points of the contact areas G 1 , G 2 , ... G n of the printing cylinder 3 with the
On notera que, dans une première approximation, on peut représenter une telle courbe par une droite, approximation largement suffisante dans la plupart des applications, en raison de faible plage des diamètres de cylindres d'impression 3 utilisés.Note that, in a first approximation, we can represent such a curve by a straight line, largely sufficient approximation in most applications, due to small diameter range of printing cylinders 3 used.
Lorsque l'on souhaite modifier l'angle γ formé par
la racle 1 avec le cylindre d'impression 3, on agit sur
les moyens de commande de positionnement du
parallélogramme 14 (non représentés sur le dessin) afin
de déformer celui-ci en le faisant pivoter autour des
articulations A et B définissant sa base 14a. La
déformation du parallélogramme 14 entraíne celle du
parallélogramme BCEF qui lui est associé et qui a en
commun avec lui le côté BC, si bien que l'articulation
E du parallélogramme associé se déplace sur un arc de
cercle centré au point F de contact de la racle 1 avec
le cylindre 3, ce qui a pour effet, dans ces
conditions, de modifier l'angle γ . On constate que la
modification de l'angle γ n'a aucune influence sur,
d'une part le nip FG, puisque le point F qui constitue
l'un des sommets du parallélogramme conserve sa
position, et d'autre part sur la distance d séparant
l'articulation B du point de contact F.When it is desired to modify the angle γ formed by the
On constate ainsi que la présente invention permet d'agir sur l'un quelconque des trois paramètres essentiels de réglage d'une racle sur un cylindre d'impression, sans que ce réglage influe sur les deux autres paramètres concernés.It is thus found that the present invention allows to act on any of the three parameters essentials for setting a doctor blade on a cylinder without affecting this setting other parameters concerned.
Claims (4)
- Device for adjusting a doctor blade (1) in contact with a printing roller (3) along a generatrix thereof, of the type in which the doctor blade (1) effects a movement of rotation about the printing roller (3) which is centred on the axis of rotation (0) of the latter and the doctor blade (1) is mounted on a mobile element (17) adapted, on the one hand, to move in a plane perpendicular to the axis of the printing roller (3) in order to effect there a movement of translation in a direction (xx') which is substantially parallel to an axis radial to the printing roller (3), and which passes through a point of contact (F) of the doctor blade (1) with the latter, the mobile element (17) being connected to a slide block (11) which is mounted to move in a slideway (9) of which the axis (xx') is substantially parallel to said radial axis, and, on the other hand, to cause it to effect a movement of rotation about said generatrix, characterized in that the latter movement is obtained by means of an articulated parallelogram (14) of which a first arm (14a) is constituted by a part of the slide block (11) included between two articulations (A, B) thereof, the element (17) being mounted for rotation at the free end of a support arm (15) located in line with a second arm (14b) of the parallelogram (14) opposite the first arm (14a), whose length (d) is equal to the distance separating the articulation (B) closest to the roller (3) from the surface of the latter, the device comprising means (19) adapted to exert on the element (17) an effort which applies the doctor blade (1) on the surface of the printing roller (3).
- Device according to Claim 1, characterized in that the slideway (9) is itself fast with support means (7) mounted to slide in a second circular slideway (5) centred on the axis of rotation (0) of the printing roller (3).
- Device according to one of the preceding Claims, characterized in that the means (19) for applying the doctor blade (1) on the printing roller are constituted by a jack.
- Device according to one of the preceding Claims, characterized in that the slideway (9) has a shape such that, at each of its points, the product of the angle of nip (β) by the radius (r) of the printing roller (3) is a constant equal to the desired nip (l).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9614295A FR2756215B1 (en) | 1996-11-22 | 1996-11-22 | DEVICE FOR ADJUSTING A SQUEEGEE FOR A PRINTING MACHINE |
| FR9614295 | 1996-11-22 | ||
| PCT/FR1997/002107 WO1998022286A1 (en) | 1996-11-22 | 1997-11-21 | Adjusting device for printing machine doctor blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0883492A1 EP0883492A1 (en) | 1998-12-16 |
| EP0883492B1 true EP0883492B1 (en) | 2002-06-12 |
Family
ID=9497912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97947117A Expired - Lifetime EP0883492B1 (en) | 1996-11-22 | 1997-11-21 | Adjusting device for printing machine doctor blade |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0883492B1 (en) |
| DE (1) | DE69713291T2 (en) |
| FR (1) | FR2756215B1 (en) |
| WO (1) | WO1998022286A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2692554A (en) * | 1949-06-23 | 1954-10-26 | E G Staude Mfg Company Inc | Doctor blade mechanism for intaglio printing presses |
| JPH07102669B2 (en) * | 1990-03-28 | 1995-11-08 | 中島精機エンジニアリング株式会社 | Doctor device |
-
1996
- 1996-11-22 FR FR9614295A patent/FR2756215B1/en not_active Expired - Fee Related
-
1997
- 1997-11-21 EP EP97947117A patent/EP0883492B1/en not_active Expired - Lifetime
- 1997-11-21 WO PCT/FR1997/002107 patent/WO1998022286A1/en active IP Right Grant
- 1997-11-21 DE DE69713291T patent/DE69713291T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998022286A1 (en) | 1998-05-28 |
| FR2756215B1 (en) | 1999-02-12 |
| FR2756215A1 (en) | 1998-05-29 |
| DE69713291D1 (en) | 2002-07-18 |
| EP0883492A1 (en) | 1998-12-16 |
| DE69713291T2 (en) | 2003-02-13 |
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