EP0641282B1 - Procede pour transformer le principe et le mode de fonctionnement des unites de mouillage traditionnelles des presses d'imprimerie offset - Google Patents

Procede pour transformer le principe et le mode de fonctionnement des unites de mouillage traditionnelles des presses d'imprimerie offset Download PDF

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Publication number
EP0641282B1
EP0641282B1 EP94909054A EP94909054A EP0641282B1 EP 0641282 B1 EP0641282 B1 EP 0641282B1 EP 94909054 A EP94909054 A EP 94909054A EP 94909054 A EP94909054 A EP 94909054A EP 0641282 B1 EP0641282 B1 EP 0641282B1
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EP
European Patent Office
Prior art keywords
roller
dampening
water
procedure
units
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Expired - Lifetime
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EP94909054A
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German (de)
English (en)
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EP0641282A1 (fr
Inventor
Jean Lucien Sarda
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the invention described herein concerns the traditional dampening units of offset printing presses and relates to a procedure designed to transform the principles and mode of their operation.
  • the purpose of these conversions is to endow dampening units modified according to the invention with characteristics and operational possibilities similar to those possessed by dampening units of recent design, which function according to principles and with a degree of precision that make it possible to obtain easily and instantly correct ratios of water to ink and close integration of the dampening and inking processes, the determining parameters which have enabled this method of printing to be developed.
  • the principle characteristic of this conversion is that the design and construction of the modified dampening units re-incorporates the main components and mechanisms of the original dampening unit, in order to retain their perfect geometry with respect to the other mechanisms of the press with which they work in harmony to perform correctly all the operations for dampening the printing plate.
  • This procedure makes it possible to produce, at low cost, dampening units which are as totally integral to the press as the original dampening units of which they are the direct issue and to incorporate, directly and at reduced cost during manufacture of these presses, all the conversions which are the subject of the invention using means similar to those proposed for the application of the invention.
  • the invention makes it possible to choose the mode of continuous film dampening which is best suited to the types of printing press to be modified, sheet by sheet or continuous, as a function of their inking rate and the printing jobs that they carry out.
  • dampening units which are relatively primitive in design, perform their overall function of dampening an offset printing plate, but possess certain serious weaknesses in the mode and precision of their operation.
  • Their dampening water feed is by alternating flow from a reservoir constituting a general supply.
  • the rollers which convey the dampening water to the printing plate are covered with a sleeve of spongy fabric designed, once they are wetted, to carry a reserve of a considerable quantity of dampening water, reasonably well distributed throughout the sleeves, but in very approximate quantities.
  • dampening units known as continuous film dampeners
  • the different types of dampening units most commonly used and an outline of their mode of operation can be defined overall as follows:
  • these continuous direct acting units do not incorporate sleeved rollers, which limits evaporation of the dampening water and so makes it possible, for some kinds of work, to add isopropyl alcohol to the water to lower its surface tension and improve its film forming properties, thereby reducing to a minimum the thickness of the film applied to the plate.
  • the invention described here aims to remedy the weaknesses of conventional dampening units and provide an improved general alternative solution for their replacement. It is characterized by the conversion of a conventional dampening unit into a continuous film dampening unit, specially designed from the starting point of the main components and mechanisms of the conventional unit which it utilises for its construction, installation and operation. This procedure offers a number of important and clear advantages which may be summarized overall as follows :
  • FIG. 1 shows a diagrammatic representation of the roller used for direct dampening of the printing plate together with the water feed system.
  • the reservoir 1 has no air inlet, so feed to the trough 2 occurs as a function of consumption by the press, the water level never rising above the bottom of the tap 3 which thus acts as a regulator of the level of the dampening solution.
  • the water take-up roller 4 is partially immersed in the dampening water contained in the trough 2 and the general mechanism of the press periodically rotates it by a varying amount, according to the quantity of water required for correct dampening of the printing plate.
  • this movement brings it into contact alternately with the water take-up roller 4, where it picks up the water required for the impression, then with the dampening distributor roller 8 moving with an axial motion, where it deposits the water.
  • the dampening forme roller 9 rotates in permanent contact with the dampening distributor roller 8 to take up its moisture, part of which it then passes on to the other dampening forme roller 10 by way of the degreasing roller 11.
  • the water duct roller 5 and the two dampening forme rollers 9 and 10 are covered with a sleeve of porous molleton which acts as a water reserve supplied by the dampening distributor roller 8.
  • the printing plate fixed on to the plate cylinder 12 is thus dampened as soon as it is brought into contact with the dampening forme rollers 9 and 10 on the decision of the press operator, the levers 13 and 14 pivoting about the axes 15 and 16.
  • the inking forme rollers 17, 18, 19 and 20 in contact with the ink distributor rollers 21 and 22, can begin to ink the printing plate on the plate cylinder 12 to enable printing to start.
  • Figure 2 and its profile view Figure 3 show in greater detail the mechanical means employed to hold in place, adjust and move the rollers constituting the dampening unit of a traditional press of one of the most widely used types.
  • the trough 2 Figure 2 is suspended from the cross member 23 which lends rigidity to the side panels 25 of the body of the press by means of the hooks 24 and two wing nuts which are omitted from the drawing in the interests of clarity.
  • the trough 2 can be removed very quickly by undoing these two nuts.
  • the water take-up roller 4 is rotated by the half-shaft 26 Figure 3 carrying at one end a device for inducing rotation actuated by the general mechanism of the press.
  • the half-shaft 26 carries a half clutch 27 and a bore into which is introduced the axle of the water take-up roller 4.
  • the latter carries the second clutch half 28, engagement of which in the half clutch 27 induces rotation of the assembly.
  • the axle of the water take-up roller 4 is engaged in a sliding half-shaft 29 kept pressed against the circlip 30 by the return spring 31.
  • the lug 32 keeps the return spring 31 under constant pressure thus ensuring that the water take-up roller 4 is kept in place.
  • the collar 33 equipped with a needle roller free-wheel 34 allows for the possibility of manual rotation of the water take-up roller 4 by means of the lever 35.
  • This mechanical arrangement makes possible very rapid dismantling of the water take-up roller 4 by pressure on the sliding half-shaft 29 which compresses the return spring 31 thus permitting disengagement of the axle of the water take-up roller 4.
  • the water duct roller 5 with its molleton sleeve 5A carries at each end a ball bearing 36 located between two fixed pins 37 and 38 Figure 2 and one sliding pin 39 arranged in a triangle in the bell cranks 6. Operation of the buttons 40 Figure 3 frees the ball bearings 36 and so permits removal of the water duct roller 5.
  • the slide-bars 48 guide the pressure springs 41 and are mounted on the fixed axle 11A of the degreasing roller 11 by means of the slide bar heads 49 which have a centring vee at their tip.
  • the degreasing roller 11 rotates about the fixed axle 11A on ball bearings. Tilting the levers 43 by means of the handles 45 thus quickly and easily disengages the dampening forme rollers 9 and 10 to permit their removal. This operation is performed daily and generally several times a day at each change of printing ink colour.
  • the third example, Figure 8 relates to a dampening unit comprising all the functions of the first example from which it derives, but is characterized by the fact that the printing plate is not dampened with a water-ink emulsion, but with a microfilm of water.
  • This variation is obtained chiefly by the use of different coating materials, possessing either oleophilic properties, such as copper, polyamide (Rilsan) or others for the first and second examples, or hydrophilic properties in the third and fourth examples, such as hard chrome or microporous ceramic, or rubber rollers of types already known, which themselves possess properties which may be oleophilic, hydrophilic or mixed.
  • the fourth example Figure 9 relates to a device similar to the third, but obtains the quantity of water by varying the relative rotation speeds of the water take-up roller 4C and the drying roller 4D with respect to the transfer roller 66A turning at the speed of the press. This procedure permits centralized adjustment of the controls of the motor or motors driving these two rollers at variable speeds and is of particular interest in the case of multi-colour presses comprising successive printing units in line.
  • Figure 4 shows the printing press ready to receive its removable module Figure 5 to complement the dampening unit.
  • the dampening forme roller 9 Figure 3 covered with a porous molleton sleeve, the chrome dampening distributor roller 8 and the water take-up roller 4 have been replaced : in the first example :
  • the rollers are driven positively by gears to permit automatic washing of the dampening unit and avoid the necessity for the operator to take precautions with regard to the distribution of the cleaning solvents, as too much greasy solvent can lead to slippage between the rollers of the dampening unit and render the cleaning operation difficult.
  • gears do not contribute to the functioning of the dampening unit.
  • Figures 5 and 6 show sectional and top views of an example of a dampening unit which gives very good results and is very practical to use for the operator of the press.
  • the removable module 55 Figure 5 can be installed in and removed from the press effortlessly and in a few seconds, giving easy access to the other elements of the press. It comprises all the supplementary mechanisms of the dampening unit. Its location and detachable fixing to the press are effected occupying the position of the original water duct roller 5 Figure 2 and using the control shaft of the duct roller 56 for support. To do this, the duct roller control must be locked, which is done by moving the cam 58 Figure 5 by means of the lever 59 to push back the return lever 57. Adjustment can be carried out by means of the nuts 60 Figure 2.
  • the removable module 55 Figure 5 is composed of two side plates 61 cross-braced and located by two centring pieces 62 which occupy the positions of the bearings of the original water duct roller 5 Figure 2, captive between the fixed pins 37 and 38 and the sliding pins 39.
  • the rubber-covered transfer roller 63 Figure 5 is mounted turning on a fixed axle 64 which acts as a cross-brace, as does the cross-member 65 between the two side plates 61.
  • Adjustment of the touch of the hard copper-covered dampening distributor roller 8A against the transfer roller 63 is performed by the nuts 60 Figure 2 when the touch of the different rollers is being adjusted.
  • a regulator roller 66 effects the liaison between the water take-up roller 4A and the transfer roller 63. It is mounted turning on a fixed shaft 67, which is itself mounted on two oscillating supports 68 and subjected to pressure by means of the screws 69 maintaining it in constant contact with the transfer roller 63. Its application to the water take-up roller 4A is effected by the action of the eccentric 70 moved by the lever 71 acting on the oscillating support 68 through the adjustment screw 72.
  • an intermediate pinion 77 mounted rotating on a fixed shaft 78, transmits the rotation at the right speed and in the right direction to the transfer roller 63 by means of the pinion 79 fixed to the latter.
  • the regulator roller 66 is similarly driven through the pinion 81 fixed to it and the pinion 80 fixed to the transfer roller 63.
  • a connecting roller 82 brings the transfer roller 63 into contact with the inking forme roller 20. It is mounted turning on a fixed shaft 83. This maintains it under permanent pressure against the inking forme roller 20 by the action of two spring thrusters 84. Two more spring thrusters 85 Figure 5 unstick it vertically upwards, thereby keeping it separate from the transfer roller 63. The two are brought into contact by manual action on an eccentric 86 Figure 6, operated through the two levers 87 acting on two rockers 88. The screws 89 Figure 5 regulate the pressure.
  • the pivots 90 of the rocker 88 are mounted on two levers 91 turning on the pivots 92 and supported on the locating pins 93 of the inking forme roller 20.
  • the connecting roller 82 effects either the pre-inking or the washing of the dampening unit by way of the inking unit, or can obtain a "frilly" printing effect by conveying additional water to the first inking forme roller to intensify the water-ink emulsion.
  • the emulsion and its regulation are obtained between the copper-covered water take-up roller 4A and the rubber-covered regulator roller 66.
  • Views A and B of Figure 7 represent, in a simplified form of the invention, an example of a water-ink emulsion continuous film dampening unit of very low cost which does not offer all the functional advantages of the preceding example, but nevertheless gives vastly better results than those obtained with the original unit.
  • the original dampening distributor roller 8 Figure 1 is replaced by the dampening distributor roller 8A Figure 7 View A, which is mechanically identical but copper-covered.
  • the rubber-covered water take-up roller 94 Figure 7 View A is driven by friction through the dampening distributor roller 8A and turns in the bearings 94A equipping the trough 95, which is supported by two side members 96 fixed to the cross-member 97 by means of the removable clamping lugs 98.
  • the emulsion is formed between the rubber-covered water take-up roller 94 and the dampening distributor roller 8A which have previously been inked.
  • the dampening distributor roller 8A performs the functions of a regulator roller and of transferring the emulsion to the dampening forme roller 9A.
  • This excess originates either from the end surfaces of the rubber-covered water take-up roller 94, if this is shorter than the dampening distributor roller 8A, length of reciprocation included, or if the dampening forme roller 9A is the same length as the dampening distributor roller 8A or longer, the latter, in its axial movement, loses contact with part of the rubber-covered water take-up roller 94 on which the water, no longer regulated, spreads out under the action of this movement between the dampening distributor roller 8A and the dampening forme roller 9A.
  • One of the characteristics of the invention is to make the rubber-covered water take-up roller 94 follow the dampening distributor roller 8A in its axial movement to enable the unit to operate.
  • This axial displacement of the rubber-covered water take-up roller 94 is achieved by equipping the stub axle 50 Figure 3 of the dampening distributor roller 8A Figure 7 View B with a steel disc 99 opposite which the shaft 100 of the rubber-covered water take-up roller 94 carries a polyamide disc 101 with a central groove in which the steel disc 99 engages.
  • the bearings 94A are fixed on to the side members 96 and each contain a ball race 94B accommodating the rotational and axial movement of the shaft 100 fixed in the rubber-covered water take-up roller 94 which corresponds in length to the dampening distributor roller 8A.
  • the dampening distributor roller 8B Figure 8 and the water take-up roller 4C are not copper covered but hard chrome plated or covered with a high-polished micro-porous ceramic.
  • the drying roller 4D and transfer rollers 66A and 63A are covered with rubber of known hydrophilic properties.
  • the dampening forme roller 9A and liaison roller 82 remain identical to those in the first example.
  • One of the characteristics of the invention, in certain forms, is the use, for the purpose of refining regulation of the quantity of water taken up from the trough, of the original mechanism of the press acting as an alternative means of taking up a certain quantity of water by means of the water take-up roller 4 Figure 3.
  • This mechanism employs a half clutch 28 to drive the shaft of the water take-up roller 4 in periodic rotation variable in amplitude and adjustable with precision.
  • the original water take-up roller 4 is replaced with a regulating roller 4D Figure 8 equipped with a similar half clutch so as to be subjected to the same method of drive transmitted by friction through the water take-up roller 4C.
  • the action of the regulating roller 4D makes it possible to take up a film of water of even thickness by means of the transfer roller 66A driven at the speed of the press, a function not performed by the original unit, which does not regulate the quantity of water taken up.
  • the fourth example operates by dampening the printing plate by mean of a continuous film of water and includes remote controlled water film regulation by means of a motor 102 Figure 9 driving the water take-up roller 4C and regulating roller 4D at different and variable speeds with respect to the other rollers which turn at the speed of the press.
  • Two side elements 103 support the motor assembly and are fixed to the cross-member 97 of the press by means of the clamping lugs 98.
  • This assembly is supported on the body of the press by the base plate 104 equipped with a height adjuster in the form of the threaded rod 105. Adjustment of the height of the motor assembly determines the pressure exerted by the water take-up roller 4C against the regulator roller 4D.
  • the synchronous belt 106 transmits the movement to the gear train driving the different rollers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coloring (AREA)
  • Air Humidification (AREA)
  • Printing Methods (AREA)
  • Ink Jet (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Claims (10)

  1. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques, caractérisé par l'utilisation d'un module amovible (55) constitué par deux plaques latérales (61) contreventées par l'axe fixe (64) du rouleau de transfert (63) et l'élément transversal (65), le rouleau régulateur (66) et le rouleau de liaison (82), l'ensemble étant situé et fixé sur la presse de façon à permettre son extraction, en utilisant la position du rouleau de la conduite d'eau d'origine (5) et un utilisant l'arbre de commande du rouleau de conduite (56) pour supporter de la même manière
    les deux éléments de centrage (62) du module amovible (55) en remplacement des roulements à billes (36) du rouleau de conduite d'eau (5) et étant de façon analogue fixés sur la presse et maintenus prisonniers par les goupilles fixes (37 et 38) et les goupilles coulissantes (39),
    le rouleat de prise d'eau (4A) et le rouleau distributeur d'humectage (8A) remplaçant les parties d'origine en situation et en position de même que le rouleau d'humectage (9A) pour préserver la géométrie parfaite avec le cylindre à plaques (12) avec lequel il fonctionne combinaison, les rouleau de transfert et de régulateur (63 et 66) du module amovible (55) étant entraînés par un train d'engrenage commençant au niveau du rouleau de distributeur d'humectage (8A) pour faciliter le nettoyage de l'unité d'humectage,
    un ensemble den mécanismes permettant d'ajuster le contact du rouleau régulateur (66) et du rouleau de liaision (82) et la rupture de leur contact avec le rouleau de prise d'eau (4A) et du rouleau de transfert (63),
    les écrous (60) affectant l'ajustement du contact du rouleau de transfert (63) en opposition au rouleau distributeur d'humectage (8A),
    le levier (59) commandant l'application ou l'enlèvement de la pression du module amovible (55) pour le positionner et l'enlever de la presse.
  2. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques comme cela est spécifié dans la revendication 1, caractérisé par le fait que l;actionnement du levier (87) établit une liason entre l'unité d'humectage et le premier rouleau d'encrage (20) au moyen du rouleau de liaison (82) permettant l'encrage, le nettoyage et l'encrage de pellicules.
  3. Procéde pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques comme cela est spécifié dans les revendications 1 et 2, caractérisé par la connexion de positionnement du module amovible (55) par deux éléments de centrage (62) maintenus prisonniers enter les deux goupilles fixes (37 et 38) et la goupille coulisssante (39) et bloqués en rotation au moyen de l'arbre de commande (56) du rouleau de conduite de la presse.
  4. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques comme cela est spécifié dans l'une quelconque des revendications précédentes, caractérisé par le fait que le rouleau de prise d'eau (4A) et le rouleau de liaison (82) de même que le rouleau distributeur d'humectage (8A) peuvent être réalisés, pour les presses offset feuille à feuille, en plastique ou en cuivre et, pour les presses offset continues telles que les presses rotatives, ils peuvent être réalisés en cuivre ou en un matériau similaire.
  5. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques selon l'une quelconque des revendications précédentes, caractérisé par le fait que le rouleau d'humectage d'origine (9) revêtu d'une enveloppe en éponge est remplacé par un rouleau d'humectage revêtu de caoutchouc (9A) possédant deux bandes (9B) en caoutchouc plus dur, d'une dureté d'environ 66 shores en combinaison avec les bandes du cylindre à plaques (12).
  6. Procédé pour le transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques selon l'une quelconque des revendications précédentes caractérisé par le fait que les rouleaux existants (4), (5), (8) et (9) sont remplacés par d'autres rouleaux (4A), (8A), (66) et (63) possédant différentes propriétés de surface oléophiles et hydrophiles par exemple à l'égard du type de caoutchouc revêtant le rouleau régulateur (66) et le rouleau de transfert (63) pour permettre l'humectage de la plaque d'impression soit avec un film d'eau continu soit avec une émulsion encre-eau, en fonction du choix de l'opérateur.
  7. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques selon la revendication 1, caractérisé par le fait que le rouleau de prise d'eau revêtu du caoutchouc (94) est réalisé de façon à suivre le mouvement latéral du rouleau distributeur d'humectage au moyen d'un disque d'acier (99) fixé sur le tronçon d'axe (50) du rouleau de distributeur d'humectage (8A) et un disque polyamide rainuré (101) fixé sur l'arbre mobile (100) du rouleau de prise d'eau revêtu du caoutchouc (94) colissant dans les paliers (94A) au moyen de chemins de roulements à billes (94b).
  8. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques selon la revendication 1, caractérisé par le fait que le système de rotation à amplitude variable et contrôlable d'origine entraînant le rouleau de prise d'eau d'origine (4) est utilisé comme moyen pour affiner le réglage de l'alimentation d'eau continue de l'unité convertie.
  9. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques selon les revendications 1 à 8, caractérisé par le fait qu'un ensemble comprenant les éléments latéraux (103) porte un moteur (102) transmettant son mouvement au moyen d'une courroie synchrone (106) et un train d'engrenage rouleaux de régulateur et de prise d'eau (4C et 4D) pour déterminer, à une distance, la régulation de la pellicule d'eau en faisant varier la vitesse par rapport au rouleau de transfert (66A) tournant à la vitesse de la presse.
  10. Procédé pour la transformation de l'alimentation alternée en alimentation continue d'unités d'humectage classiques, caractérisé par l'utilisation d'un module amovible (55) avec un rouleau régulateur (66) reliant un rouleau de prise d'eau (4A) avec un rouleau de transfert (63) venant en pression contre un rouleau distributeur d'humectage (8A), un rouleau de liaison (82) assurant la continuité à la demande entre l'unité d'humectage et l'unité d'encrage.
EP94909054A 1993-02-24 1994-02-23 Procede pour transformer le principe et le mode de fonctionnement des unites de mouillage traditionnelles des presses d'imprimerie offset Expired - Lifetime EP0641282B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9302085 1993-02-24
FR9302085A FR2701891B1 (fr) 1993-02-24 1993-02-24 Procédé de transformation des principes et mode de fonctionnement des groupes de mouillage conventionnels des presses à imprimer offset.
PCT/EP1994/000542 WO1994019189A1 (fr) 1993-02-24 1994-02-23 Procede pour transformer le principe et le mode de fonctionnement des unites de mouillage traditionnelles des presses d'imprimerie offset

Publications (2)

Publication Number Publication Date
EP0641282A1 EP0641282A1 (fr) 1995-03-08
EP0641282B1 true EP0641282B1 (fr) 1996-02-07

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EP94909054A Expired - Lifetime EP0641282B1 (fr) 1993-02-24 1994-02-23 Procede pour transformer le principe et le mode de fonctionnement des unites de mouillage traditionnelles des presses d'imprimerie offset

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EP (1) EP0641282B1 (fr)
JP (1) JP3343353B2 (fr)
AT (1) ATE133897T1 (fr)
CA (1) CA2151843C (fr)
DE (1) DE69400070T2 (fr)
DK (1) DK0641282T3 (fr)
ES (1) ES2086998T3 (fr)
FR (1) FR2701891B1 (fr)
GR (1) GR3019841T3 (fr)
WO (1) WO1994019189A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2818190B1 (fr) 2000-12-14 2003-03-07 Jean Lucien Sarda Procede permettant d'elargir le mode de fonctionnement des groupes de mouillage conventionnels des presses a imprimer offset
DE102011012890A1 (de) * 2010-03-29 2011-09-29 Heidelberger Druckmaschinen Ag Verfahren zur Erzeugung einer Submikrometer-Fluidschicht

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1557479A (fr) * 1967-03-28 1969-02-14
DD156238B1 (de) * 1981-02-26 1989-03-22 Arndt Jentzsch Verreibwalze in druckmaschinen

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Publication number Publication date
CA2151843A1 (fr) 1994-09-01
DK0641282T3 (da) 1996-06-24
WO1994019189A1 (fr) 1994-09-01
ATE133897T1 (de) 1996-02-15
JP3343353B2 (ja) 2002-11-11
ES2086998T3 (es) 1996-07-01
DE69400070D1 (de) 1996-03-21
GR3019841T3 (en) 1996-08-31
EP0641282A1 (fr) 1995-03-08
FR2701891B1 (fr) 1995-05-19
DE69400070T2 (de) 1996-08-29
CA2151843C (fr) 2000-05-02
JPH08506776A (ja) 1996-07-23
FR2701891A1 (fr) 1994-09-02

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