EP0885720B1 - Installation d'encrage multifonctionnelle pour une imprimeuse flexographique - Google Patents
Installation d'encrage multifonctionnelle pour une imprimeuse flexographique Download PDFInfo
- Publication number
- EP0885720B1 EP0885720B1 EP98110785A EP98110785A EP0885720B1 EP 0885720 B1 EP0885720 B1 EP 0885720B1 EP 98110785 A EP98110785 A EP 98110785A EP 98110785 A EP98110785 A EP 98110785A EP 0885720 B1 EP0885720 B1 EP 0885720B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- ink
- doctor blade
- doctor
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/027—Ink rail devices for inking ink rollers
Definitions
- the present invention relates to an inking installation multifunctional for a flexographic printer, especially for a flexographic printer intended for the printing of elements in strip or plate such as strips or sheets of paper, cardboard or corrugated cardboard.
- the flexographic printers that we know today typically include a printing station consisting of a plate cylinder to which the ink is transferred by means of a cylinder more known by practitioners under the name of "Anilox cylinder".
- This screened cylinder has a plurality of cells whose density and distribution is based on the type of print job to be done.
- This Screened cylinder can be supplied with ink in several ways.
- a first way to supply this screened cylinder with ink is to associate it with a wiping roller.
- the ink is brought in using a pump in an area above the point of contact between the screened cylinder and wiping roller.
- This ink is therefore laminated between these two bodies so as to wipe the screened cylinder so as not to leave ink only in its cells.
- This solution is suitable for most common print jobs that do not require a excellent quality.
- this provision allows printing, also with medium quality, large, uniform surfaces called "flat" by specialists.
- the solution of a pick-up roller soaking in an inkwell.
- the pick-up roller deposits ink on the wiping roller at a point located before the point of contact between the screened cylinder and the wiping roller.
- doctor blade chamber consists of a body of doctor blade chamber in the form of a shaped hollow bar "U" whose opposite part of the screened cylinder has two blades of doctor blades and both ends of which are closed by gaskets appropriate.
- the ink is introduced into the body of the chamber doctor blade with a pump and the doctor blade is located arranged on the arc of defined circumference, in the direction of rotation of the screened cylinder, between it and the point of contact between the cylinder door shot and the screened cylinder which will act as a means of removing the film ink deposited on the screened cylinder so that the ink is not more than in the cells of the screened cylinder.
- the other doctor blade constituting a means of pre-priming and sealing for the chamber squeegees.
- Patent FR 2 687 096 describes such a doctor blade chamber.
- Another device is equipped two chambers with identical doctor blades, joined to each other, and mounted in pivoting around an axis placed under the screened cylinder.
- the layout of however, these doctor blade chambers do not allow them to be used simultaneously.
- Forming an ink reservoir the body of each of these rooms with the particularity of being divided into two zones by a constriction.
- the ink circulates there under pressure while passing from a pipe leading to a first buffer chamber, then travels through a slot before entering the first zone of said reservoir in contact with the screened cylinder. It then goes through the strangulation to join the second tank area and spring out of the latter through a new slot flow followed by a second buffer chamber and a exit.
- doctor blade chamber with a metal blade is suitable particularly good for carrying out work for which we are looking excellent print quality. Indeed, by the qualities of rigidity doctor blades, it is easy to very precisely control the thickness of the ink film which one wishes to deposit on the screened cylinder. However, this disadvantage of not being able to ensure good quality for printing large areas ("flat") because it does not allow not bring enough ink to the screened cylinder and for printing large "flat” it will be necessary to replace the screened cylinder used by another cylinder with a larger number of cells.
- the wiping of the ink film on the screened cylinder depends, between others of the material used for the doctor blades, their thickness, as well as the angle given to them at the place of their point of action against the screened cylinder.
- This solution although more advantageous than the wiping roller, however has substantially the same disadvantages when you want excellent quality printing for fine jobs with only small "flat” in not changing the screened cylinder.
- the object of the present invention is to remedy, in whole or in part to the aforementioned drawbacks.
- the invention relates to an inking installation multifunctional for a flexographic printer, especially for a flexographic printer intended for the printing of elements in strip or plate such as strips or sheets of paper, cardboard or corrugated cardboard comprising a plate cylinder, a screened cylinder and means for supplying a quantity of ink determined on the screened cylinder, characterized in that the means for bring a quantity of ink on the screened cylinder are constituted by at at least two scraper chambers, placed opposite each other and the other of the screened cylinder, in that the screened cylinder used is always the same whatever the type of printing work to be done and in this that one can choose to use either of these scraper chambers depending on the type of print job to be performed without having to replace the screened cylinder.
- one of the rake chambers is a squeegees fitted with squeegee blades allowing practically wiping complete the circumference of the screened cylinder and the other rake chamber is a doctor blade chamber fitted with doctor blades for leave a determined film of ink remaining on the circumference of the cylinder raster.
- the rake chamber allowing wiping practically complete the circumference of the screened cylinder is a squeegee chamber fitted with steel strip squeegee blades.
- the rake chamber allowing a determined ink film to remain on the circumference of the screened cylinder is a scraper chamber equipped with plastic blade blades.
- the blade blades of one and the other doctor blade chamber made of low coefficient plastic friction.
- the contact pressure of the blade blades of the scraper chamber allowing a determined ink film to remain on the circumference of the screened cylinder is controlled according to the speed operation of the printer so as to control the film thickness ink brought to the screened cylinder.
- FIG. 1 is a schematic view of an inking installation 1, for a flexographic printer, including a plate cylinder 2 which is supported by a screened cylinder 3 associated with a first doctor chamber 4 and a second doctor chamber 5. It should be noted that one could consider using more than two rake chambers.
- the screened cylinder 3 is chosen so that it has a number cells corresponding to a screened cylinder used for fine work not having large "dishes".
- the first rake chamber 4 is mounted on a support 6 constituted by two levers 7 and 8 arranged at each end of a cross member 33. The levers 7 and 8 pivot around an axis 10 arranged in a bearing 11 fixed on a spacer 12 extending between the two lateral frames 13 and 14 of the inking installation 1.
- the pivoting of the levers 7 and 8 is ensured by a pneumatic cylinder or hydraulic 15 whose body 16 is fixed, so that it can rotate somewhat against the inner face of the side frames 13 and 14 by means a pin 17.
- the head 18 of the rod 19 of the pneumatic cylinder or hydraulic 15 is connected to a lug 20 fixed by means of screws, not shown in this figure, on the upper part 21 of each levers 7 and 8.
- the second rake chamber 5 is mounted so analogous on identical elements which will bear the same reference figures to which the index "a" will have been added. In the example shown in Figure 1, only the first doctor blade chamber 4 is contact with the screened cylinder 3, which corresponds to the use of inking system 1 for fine jobs with only small "flat".
- the ink supply of the first and second chambers doctor blades 4 and 5 is provided by an ink pump 22, of good construction known and available directly from the market.
- This ink pump draws the ink from a reservoir 23 and directs it towards the first and second scraper chambers through a valve 24 by the lines 25, 26, 27 and 28.
- the ink is recovered by gravity through the pipe 29 connected on the one hand to a tank 30 and on the other hand to the reservoir 23.
- the tank 30 extends over the entire length of the screened cylinder 3 and it is fixed, by means not shown, between the two side frames 13 and 14.
- first and second doctor chambers 4 and 5 on either side of the screened cylinder 3, in a different orientation passing through the center of rotation of the screened cylinder 3, so that the scraper chambers 4 and 5 are always facing each other, although placed on two axes different.
- FIG. 2 is a schematic view in partial section of a first scraper chamber 4 intended to be put into service when happens to be in the performance of fine work not involving only small "dishes".
- the scraper chamber 4 has a body 9 of scraper chamber consisting, in the example chosen, of a transverse bar aluminum pivotally mounted on an axis 31 between two lugs fixing 32 welded to each end of the cross member 33 of the support 6.
- the face 34 of the body 9 of the doctor blade chamber is machined so as to present two inclined planes 35 and 36 on which will be placed the blades of doctor blades 37 and 38 which will be held firmly by means of a bar 39, respectively 40 fixed to the rake chamber body 9 with screws 41, respectively 42, distributed over the entire length of the body 9 of squeegee chamber.
- the chosen position of the scraper chamber 4 is provided on the one hand by an inflatable hose 43 acting on the rear part 44 of the body 9 of the doctor blade chamber and by a position limitation and adjustment means, not shown, of well known construction.
- the inflatable hose 43 is placed in an iron "U" 45 welded against the cross member 33 of the support 6.
- doctor blade 38 and 38 used in this example are made of metal, for example a steel foil of thickness between 0.2 and 0.4 millimeters.
- the screened cylinder rotates in the direction indicated by the arrow 46 and therefore it is the doctor blade 38 which will act as an organ wiping off the ink supplied to the screened cylinder 3 so that only the cells of the latter are filled with ink.
- FIG 3 is a schematic view in partial section of a second squeegee chamber 5 intended to be put into service when happens to be in the presence of the execution of works comprising large "flat".
- the rake chamber 5 has a chamber body 9a with rakes constituted in the example chosen of a transverse bar in aluminum pivotally mounted on an axis 31 a between two lugs fixing 32a welded to each end of the crosspiece 33a of the support 6a.
- the face 34a of the rake chamber body 9a is machined so as to present two inclined planes 35a and 36a on which will be placed the blade blades 37a and 38a which will be held firmly at by means of a bar 39a, respectively 40a fixed to the body 9a of scraper chamber using screws 41a, 42a respectively, distributed over the entire length of the rake chamber body 9a.
- the chosen position of the rake chamber 5 is ensured by starts with an inflatable hose 43a acting on the rear part 44a of the body 9a with a doctor blade chamber and by means of limitation and adjustment of position, not shown, of well known construction.
- the inflatable hose 43a is placed in a "U" iron 45a welded against the cross member 33a of the support 6a.
- the blade blades 37a and 38a used in this example are made of plastic, for example a material plastic with a low coefficient of friction between 0.8 and 1.6 millimeters.
- the screened cylinder rotates in the direction indicated by arrow 46a and therefore this is the doctor blade 37a which will act as a wiping unit for the ink deposited on the cylinder screened 3.
- the use of plastic blade blades allows to leave pass a larger ink volume than necessary to fill the alveoli of the screened cylinder 3 and thereby authorizes the printing of large "to flat "due to the higher volume of ink supplied to the screened cylinder 3. It is obvious that one could choose to use only rooms with squeegees 4, 5 fitted with plastic squeegee blades, choosing qualities of plastic of different thickness as well as a contact angle also different for each of the scraper chambers.
- FIG. 4 represents a diagram showing the variation of the volume of ink supplied to the screened cylinder 3 as a function of the speed of rotation thereof with constant contact pressure of the blades doctor blades 37a, 38.
- the speed of rotation of the screened cylinder depends well heard from the operating speed of the printer.
- Vmach which represents the speed of operation of the printer
- Ve which represents the volume of ink supplied to the screened cylinder 3.
- the curve Vn represents the nominal ink volume, i.e. the ink volume necessary to fill the cells of the screened cylinder.
- the Vc curve represents the variation of the ink volume during pressure inking constant for a wiping roller and the Vchp curve represents the variation of the ink volume in constant pressure inking for a doctor blade chamber fitted with plastic doctor blade blades.
- FIG. 5 represents a diagram showing the variation of the volume of ink supplied to the screened cylinder as a function of the speed of rotation thereof with variable contact pressure of the blades doctor blades 37a, 38.
- the value Vmach has been plotted on the abscissa which represents the operating speed of the printer and ordered the value Ve which represents the volume of ink supplied to the screened cylinder 3.
- Curve Vn represents the nominal ink volume, that is to say the volume of ink required to fill the cells of the screened cylinder.
- Curve V1 represents the variation in ink volume in oversinking for a pressure p1
- the curve V2 represents the variation of the volume of ink inking for a pressure p2
- the curve V3 represents the variation of the ink volume in over-inking for a pressure p3
- the curve V4 represents the variation of the ink volume in over-inking for a pressure p4.
- the curve Vs represents the volume ink brought to the screened cylinder 3 for a given over-inking.
- the contact pressure of the blade blades is obtained, in the present example, by the action of the inflatable hose or tube 43, respectively 43a.
- the air pressure in the inflatable tube allows to oppose the pressure hydro-dynamic depending on the speed of rotation of the screened cylinder 3 and, if this speed increases, the thickness of the ink film increases. If we increases the air pressure in the inflatable tube 43, 43a, we will reduce the thickness of the ink film, hence the idea of controlling this pressure by function of the speed of rotation of the screened cylinder 3 to obtain a control of the thickness of the ink film. Using pressures different p1, p2, p3, p4, we obtain a network of curves V1, V2, V3, V4 corresponding to the different pressures. For a given over-ink, we switches from one pressure to another depending on the speed of rotation of the screened cylinder 3.
- FIG. 6 shows a block diagram of a system control of the contact pressure of the blade blades doctor chambers 4, respectively 5.
- the chamber doctor blades 4 is of the metal doctor blade type and the doctor chamber 5 uses plastic blade blades. It is therefore used to carry out the works with large "flat”.
- This servo includes a generator of pulses GI mounted on the axis of the screened cylinder 3 so as to give a information Vr relating to its speed of rotation. This Vr information is transmitted to a decoder 50 then sent to a comparator 51.
- the contact pressure of plastic doctor blade blades 5 is represented by the information Pr coming from a sensor such that, by example a strain gauge.
- This information Pr is transmitted to a decoder 52 before being sent to comparator 51.
- the feedback loop of the servo circuit consists of a reader 54, for example a densitometer, which will transmit Lc information representing the indication relating to the quality of the printing of large "to dishes ".
- the information Lc is transmitted to a decoder 55 before being sent to comparator 51.
- a closed loop control It is understood that we could choose to work in open loop by removing the organs relating to the automatic control of the print quality of large "flat” and therefore the indication Lc.
- the air pressure in the inflatable tube 43a is obtained by means of a pump P and its intensity is regulated by a pressure limiter 53.
- the pump P also supplies the inflatable tube 43 from the scraper chamber 4 through another pressure relief valve 56 ensuring constant pressure in the inflatable tube 43 when uses the scraper chamber 4 because in this case it is not necessary to vary the contact pressure of the blade blades of this chamber to scrapes since we are not looking for an over-inking.
- switch to "servo" mode and the comparator 51 will emit, as a function of the information Lc, Pr and Vr, a Pbg information which will be sent to the pressure relief valve 53 which will provide a modulated pressure Pm at the inflatable tube 43a.
- Reader 54 is placed in the vicinity of the printed sheet 57, moving in the direction indicated by arrow 58, so as to read its underside.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
- La figure 1 est une vue schématique d'une installation d'encrage,
- la figure 2 est une vue schématique en coupe partielle d'une première chambre à râcles,
- la figure 3 est une vue schématique en coupe partielle d'une deuxième chambre à râcles,
- la figure 4 représente un diagramme montrant la variation du volume d'encre apporté au cylindre tramé en fonction de la vitesse de rotation de celui-ci avec une pression de contact constante des lames de râcles,
- la figure 5 représente un diagramme montrant la variation du volume d'encre apporté au cylindre tramé en fonction de la vitesse de rotation de celui-ci avec une pression de contact variable des lames de râcles, et
- la figure 6 représente un schéma-bloc d'un système de régulation de la pression de contact des lames de râcles.
Claims (6)
- Installation d'encrage multifonctionnelle pour une imprimeuse flexographique, notamment pour une imprimeuse flexographique destinée à l'impression d'éléments en bande ou en plaque tels que des bandes ou des feuilles de papier, de carton ou de carton ondulé, installation d'encrage comprenant un cylindre porte cliché (2), un cylindre tramé (3) et des moyens pour apporter une quantité d'encre déterminée sur le cylindre tramé (3), caractérisée en ce que les moyens pour apporter une quantité d'encre sur le cylindre tramé (3) sont constitués par au moins deux chambres à râcles (4, 5), placées en regard l'une de l'autre de part et d'autre du cylindre tramé (3), en ce que le cylindre tramé (3) utilisé est toujours le même quelque soit le genre de travaux d'impression à réaliser et en ce que l'on peut choisir d'utiliser indifféremment l'une ou l'autre desdites chambres à râcles (4, 5) en fonction du genre des travaux d'impression à réaliser sans avoir à remplacer le cylindre tramé (3).
- Installation selon la revendication 1, caractérisée en ce que l'une des chambres à râcles (4) est une chambre à râcles équipée de lames de râcles (37, 38) permettant un essuyage pratiquement complet de la circonférence du cylindre tramé (3) et en ce que l'autre chambre à râcles (5) est une chambre à râcles équipée de lames de râcles (37a, 38a) permettant de laisser subsister un film d'encre déterminé sur la circonférence du cylindre tramé (3).
- Installation selon la revendication 2, caractérisée en ce que la chambre à râcles (4) permettant un essuyage pratiquement complet de la circonférence du cylindre tramé (3) est une chambre à râcles équipée de lames de râcles (37, 38) en feuillard d'acier.
- Installation selon la revendication 2, caractérisée en ce que la chambre à râcles (5) permettant de laisser subsister un film d'encre déterminé sur la circonférence du cylindre tramé (3) est une chambre à râcles équipée de lames de râcles (37a, 38a) en matière plastique.
- Installation selon la revendication 2, caractérisée en ce que les lames de râcles (37, 38, 37a, 38a) de l'une et de l'autre chambre à râcles (4, 5) sont réalisées en matière plastique de faible coefficient de frottement.
- Installation selon la revendication 2, caractérisée en ce que la pression de contact des lames de râcles (37a, 38a) de la chambre à râcles (5), permettant de laisser subsister un film d'encre déterminé sur la circonférence du cylindre tramé (3), est asservie en fonction de la vitesse de fonctionnement de l'imprimeuse de façon à contrôler l'épaisseur du film d'encre apporté au cylindre tramé (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9707883 | 1997-06-19 | ||
FR9707883A FR2764843B1 (fr) | 1997-06-19 | 1997-06-19 | Installation d'encrage multifonctionnelle pour une imprimeuse flexographique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0885720A1 EP0885720A1 (fr) | 1998-12-23 |
EP0885720B1 true EP0885720B1 (fr) | 2002-01-30 |
Family
ID=9508367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98110785A Expired - Lifetime EP0885720B1 (fr) | 1997-06-19 | 1998-06-12 | Installation d'encrage multifonctionnelle pour une imprimeuse flexographique |
Country Status (5)
Country | Link |
---|---|
US (1) | US6029573A (fr) |
EP (1) | EP0885720B1 (fr) |
DE (1) | DE69803630T2 (fr) |
ES (1) | ES2172062T3 (fr) |
FR (1) | FR2764843B1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6471773B1 (en) * | 1999-07-06 | 2002-10-29 | Mark R. Atkins | Doctor blade assembly |
US6276270B1 (en) * | 1999-08-20 | 2001-08-21 | Interflex, L.L.C. | Ink distributton apparatus and method for anilox roll |
EP1090755B1 (fr) * | 1999-10-05 | 2010-01-27 | Gallus Ferd. Rüesch Ag | Machine d'impression avec chambre à racles |
DE10055827A1 (de) * | 2000-11-10 | 2002-05-29 | Heidelberger Druckmasch Ag | Farbdosiersystem in einer Druckmaschine |
US6557465B2 (en) * | 2001-02-20 | 2003-05-06 | Corrugated Gear & Services, Inc. | Printing machine with dual ink applicators |
US7080901B2 (en) * | 2002-12-03 | 2006-07-25 | Dai Nippon Printing Co. Ltd. | Printing unit and manufacturing line for manufacturing flexible organic EL display |
BE1015250A6 (nl) * | 2002-12-13 | 2004-12-07 | Rotatie tampondruksysteem voor het bedrukken van beperkt buigzame voorwerpen. | |
US7014897B2 (en) * | 2002-12-16 | 2006-03-21 | Xerox Corporation | Imaging member having a textured imaging surface and a phase change ink image producing machine having same |
ES2640222T3 (es) | 2007-10-18 | 2017-11-02 | Bobst Group Italia Spa | Conjunto de cuchilla raspadora y método que permite usar diferentes tintas |
HUE032611T2 (hu) | 2014-09-11 | 2017-10-30 | Teca-Print Ag | Rotációs tamponnyomógép |
CN104985930A (zh) * | 2015-07-20 | 2015-10-21 | 浙江炜冈机械有限公司 | 印刷机的墨斗自动升降机构 |
EP3368316B1 (fr) | 2015-10-27 | 2021-03-03 | Macarbox, S.L.U. | Dispositif pour appliquer un fluide sur un rouleau |
CN109910428A (zh) * | 2019-04-09 | 2019-06-21 | 涿州皓原箔业有限公司 | 一种铝箔上色双面刮刀设备 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4041864A (en) * | 1972-05-09 | 1977-08-16 | Dahlgren Manufacturing Company | Method and apparatus for inking printing plates |
DE2340300C3 (de) * | 1973-08-09 | 1979-09-13 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach | Farbkastenwalze für ein Heberfarbwerk an Druckmaschinen |
FR2397939A1 (fr) * | 1977-07-22 | 1979-02-16 | Chambon Machines | Dispositif d'encrage pour impression a l'encre grasse |
US4497250A (en) * | 1983-02-08 | 1985-02-05 | Motter Printing Press Co. | Ink Fountain |
US4526102A (en) * | 1983-10-31 | 1985-07-02 | Molins Machine Company, Inc. | Ink circulation and wash up system for a press |
US4627350A (en) * | 1983-11-08 | 1986-12-09 | Masayoshi Sato | Convertible ink scraper device corresponding to reverse-rotatable mesh roller |
EP0368485A3 (fr) * | 1988-10-31 | 1991-01-30 | Seiken Graphics, Inc. | Impression lithographique |
US5003876A (en) * | 1989-02-10 | 1991-04-02 | The Ward Machinery Company | Printing apparatus with dual inking system |
US5027513A (en) * | 1990-02-12 | 1991-07-02 | Allisontech Sales, Inc. | Seal relief doctor blade |
US5103732A (en) * | 1991-02-14 | 1992-04-14 | Ward Holding Company, Inc. | Doctor blade head assembly and printing apparatus therewith |
US5243907A (en) * | 1992-01-22 | 1993-09-14 | The Langston Corporation | Divider seal for split-fountain chambered doctor blade for a flexographic printing press |
US5184556A (en) * | 1992-02-18 | 1993-02-09 | Paper Converting Machine Company | Printing apparatus and method |
US5239925A (en) * | 1992-06-02 | 1993-08-31 | Ronald L. Harper | Ink distribution apparatus |
US5406887A (en) * | 1993-01-15 | 1995-04-18 | Paper Converting Machine Company | Apparatus and method for doctor blade replacement in a flexographic press |
-
1997
- 1997-06-19 FR FR9707883A patent/FR2764843B1/fr not_active Expired - Fee Related
-
1998
- 1998-06-10 US US09/095,629 patent/US6029573A/en not_active Expired - Lifetime
- 1998-06-12 EP EP98110785A patent/EP0885720B1/fr not_active Expired - Lifetime
- 1998-06-12 DE DE69803630T patent/DE69803630T2/de not_active Expired - Fee Related
- 1998-06-12 ES ES98110785T patent/ES2172062T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69803630D1 (de) | 2002-03-14 |
FR2764843A1 (fr) | 1998-12-24 |
EP0885720A1 (fr) | 1998-12-23 |
FR2764843B1 (fr) | 1999-08-20 |
DE69803630T2 (de) | 2002-08-08 |
ES2172062T3 (es) | 2002-09-16 |
US6029573A (en) | 2000-02-29 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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