EP0297528B1 - Doctor device - Google Patents
Doctor device Download PDFInfo
- Publication number
- EP0297528B1 EP0297528B1 EP88110349A EP88110349A EP0297528B1 EP 0297528 B1 EP0297528 B1 EP 0297528B1 EP 88110349 A EP88110349 A EP 88110349A EP 88110349 A EP88110349 A EP 88110349A EP 0297528 B1 EP0297528 B1 EP 0297528B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- doctor
- roller
- bar
- check
- doctor device
- 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
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
- B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/40—Inking units
- B41F15/42—Inking units comprising squeegees or doctors
- B41F15/426—Inking units comprising squeegees or doctors the squeegees or doctors being magnetically attracted
Definitions
- the invention relates to a doctor device with a magnetically pressed doctor roller, which rests on a bar made of elastic material, which is connected to a rigid support, leaving its lower doctor area free, and with start-up parts for the doctor roller arranged near the ends of the bar.
- Such a device is known from AT-A-361 439. Due to the free-hand, loose insertion of the squeegee roller into the stencil and due to operational reasons occasionally inclined of the circular stencil to the direction of rotation, the squeegee roller is sometimes not at right angles to the direction of rotation. When a rigid strip is arranged between the run-on parts, the squeegee roller lifts off the strip due to such an inclination and the application mass passes into the area behind the squeegee roller.
- the object of the invention is to provide a device which combines the advantages of the two known devices without having this disadvantage.
- the bar which is shorter than the doctor roller, is connected to the carrier only in its upper edge region and that the run-on parts have thrust surfaces for the doctor roll arranged at an angle to the roller axis.
- the roller 6 protrudes beyond the bar 1
- the sloping surfaces provided are effective immediately if the doctor roller deviates from the normal position.
- the fact that only the upper edge region of the bar is clamped makes it sufficiently twistable to lie against the bar along the entire length even when an angle occurs between the bar and the doctor blade roller.
- the known, obliquely arranged contact surfaces now lead to the doctor roll being transferred into the correct position without the application mass in the meantime passing into the area behind the doctor roll.
- FIG. 1 represents a first embodiment
- the right side a second embodiment of the invention according to section line II in FIG. 5.
- FIGS. 2 and 3 illustrate the function of a device corresponding to the left side of FIG. 1 .
- Figure 4 is a longitudinal direction 5 shows the front view of the exemplary embodiment according to the left-hand side of FIG. 1
- FIG. 6 is a section along the line VI-VI in FIG. 4.
- the device according to the invention according to FIG. 1 has left and right side delimiters 16, 16 ', which are designed symmetrically and either both correspond to the embodiment on the left side of FIG. 1 or as a possible variant of the embodiment according to the right side of FIG. 1 .
- the side delimiter 16 shown on the left in FIG. 1 two run-on parts 2, 11 are provided for a doctor roll 6 extending transversely to the web, which have run-on surfaces 3 and 7 for the doctor roll 6.
- the guide bodies 2 and 11, which are made of plastic, carry a plate 17 made of magnetizable material on their outside and are height-adjustable in a guide 13, the function of which can be seen in particular from FIGS. 5 and 6.
- the strip 1 made of rubber-elastic material, the front 8 of which, in the unloaded state according to FIG. 1, runs at a distance from the rear end 4, 4 'of the contact surfaces 3, 3' for a roller 6 arranged in front of the strip 1.
- the rear 9 of the sealing strip 1 runs behind the front end 10, 10 'of the contact surfaces 7, 7' which take effect when the doctor roller 6 is arranged behind the strip (cf. FIG. 4, dashed line).
- the contact surfaces 7 and a symmetrical surface (not shown) on the right side for the roller arranged behind the sealing strip 1 run parallel to the front contact surfaces 3, 3 '.
- only one thrust part 2 ' is provided on both sides, which carries the converging thrust surfaces 3', 7 '. This variant is of interest if the doctor roller 6 shows the tendency to move obliquely forward against the direction of movement 21 of the web.
- FIGS. 2 and 3 The function of the device according to the invention is shown schematically in FIGS. 2 and 3. From FIG. 2 it can be seen that the elastic strip under the pressure of the doctor roller 6 is pushed back with its front side 8 to the end of the contact surfaces 3, 3 '. If the squeegee roller 6 now moves into the inclined position shown in FIG. 3, the contact surface 3 ensures that a force is exerted on the front end of the roller, which returns it to the web. It is essential for the invention that the squeegee roller 6 does not lose contact with the bar 1. This is achieved in that the strip 1 is displaceable in the direction of movement relative to the run-on parts 2, 2 'and, moreover, consists of twistable, rubber-elastic material.
- FIG. 4 shows the device according to the invention applied to a printing device with which a web 5 fastened to a printing blanket 19 is treated by means of a circular template 18.
- the bar 1 is held here in a clamping profile 15, which is connected to the paint tube 14, which is used to supply the application mass.
- the bar 1 is provided with a longitudinal groove 12.
- the side delimiter 16 which carries the run-on parts 2, 11, is vertically displaceably mounted with a lateral guide 13.
- the falling out of the side delimiter 16 is prevented by a bolt 20 which passes through an opening 22 in a guide plate 23 which is guided in a recess of the side delimiter 16.
- a magnetic bar is provided below the blanket 19 for pressing the doctor roller 6. This works simultaneously on the plate 17 made of magnetizable material, which is attached to the outside of the side delimiter 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Duct Arrangements (AREA)
- Linear Motors (AREA)
- Coating Apparatus (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Road Paving Machines (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
Description
Die Erfindung betrifft ein Rakelgerät mit einer magnetisch angepreßten Rakelrolle, welche an einer Leiste aus elastischem Material anliegt, die mit einem starren Träger unter Freilassung ihres unteren Rakelbereiches verbunden ist, und mit nahe den Enden der Leiste angeordneten Anlaufteilen für die Rakelrolle.The invention relates to a doctor device with a magnetically pressed doctor roller, which rests on a bar made of elastic material, which is connected to a rigid support, leaving its lower doctor area free, and with start-up parts for the doctor roller arranged near the ends of the bar.
Eine derartige Einrichtung ist aus AT-A-361 439 bekannt. Durch das freihändig erfolgende, lose Einlegen der Rakelrolle in die Schablone und durch betriebstechnisch bedingte fallweise Schrägstellung der Rundschablone zur Laufrichtung liegt die Rakelrolle mitunter nicht rechtwinklig zur Laufrichtung. Bei Anordnung einer starren Leiste zwischen den Anlaufteilen hebt sich durch eine solche Schrägstellung die Rakelrolle von der Leiste ab und es kommt zu einem Durchtritt von Auftragsmasse in den Bereich hinter der Rakelrolle.Such a device is known from AT-A-361 439. Due to the free-hand, loose insertion of the squeegee roller into the stencil and due to operational reasons occasionally inclined of the circular stencil to the direction of rotation, the squeegee roller is sometimes not at right angles to the direction of rotation. When a rigid strip is arranged between the run-on parts, the squeegee roller lifts off the strip due to such an inclination and the application mass passes into the area behind the squeegee roller.
Die mögliche Schrägstellung der Rakelrolle bewirkt auf jeden Fall Funktionsstörungen durch seitliches Auswandern. Dabei entsteht eine erhebliche Schubkraft in Axialrichtung dieser Rolle, die besonders bei langen Rollen dazu führt, daß Anlaufklötze, die zu deren Zentrierung vorgesehen wurden, sich in die senkrecht zur Rollenachse stehenden Anlaufflächen derartiger Anlaufteile einbohrten und diese zerstörten.The possible inclination of the squeegee roller definitely causes malfunctions due to lateral migration. This creates a considerable thrust force in the axial direction of this roller, which, particularly in the case of long rollers, means that thrust blocks which were provided for centering them drilled themselves into the thrust surfaces of such thrust parts perpendicular to the roller axis and destroyed them.
Eine bekanntgewordene Einrichtung (vgl. AT-A-347 388) sollte die dargestellten Schwierigkeiten beseitigen. Tatsächlich hat dieser Vorschlag jedoch keinen Eingang in die Praxis gefunden, weil die dort vorgesehenen seitlichen Anlaufteile zwar das Problem lösten, wie eine zufällig entstandene Schrägstellung der Rakelrolle wieder korrigiert werden kann, das Übertreten von Auftragsmasse in den Bereich hinter der Rakelrolle bei einer derartigen Einrichtung jedoch nicht verhindert werden konnte.A device that has become known (cf. AT-A-347 388) should eliminate the difficulties presented. In fact, however, this proposal has not found its way into practice, because the side run-on parts provided there solved the problem of how a randomly created inclination of the squeegee roller can be corrected, the transfer of application mass in the area behind the doctor roller with such a device could not be prevented.
Aufgabe der Erfindung ist es, eine Einrichtung zu schaffen, welche die Vorteile der beiden bekannten Einrichtungen vereinigt, ohne diesen Nachteil aufzuweisen. Erfindungsgemäß ist hiezu vorgesehen, daß die Leiste, welche kürzer ist als die Rakelrolle, lediglich in ihrem oberen Randbereich mit dem Träger verbunden ist und daß die Anlaufteile zur Rollenachse schrägstehend angeordnete Anlaufflächen für die Rakelrolle aufweisen.The object of the invention is to provide a device which combines the advantages of the two known devices without having this disadvantage. According to the invention, it is provided that the bar, which is shorter than the doctor roller, is connected to the carrier only in its upper edge region and that the run-on parts have thrust surfaces for the doctor roll arranged at an angle to the roller axis.
Dadurch daß die Rolle 6 die Leiste 1 überragt, werden die vorgesehenen Schrägflächen bei Abweichungen der Rakelrolle von der Normallage sofort wirksam. Dadurch daß nur der obere Randbereich der Leiste eingespannt ist, wird diese hinreichend verwindbar, um sich auch bei Auftreten eines Winkels zwischen Leiste und Rakelrolle an diese auf der ganzen Länge anzulegen. Im Zusammenhang mit der erfindungsgemäß ausgestalteten biegeelastischen Leiste führen die an sich bekannten, schrägstehend angeordneten Anlaufflächen nun dazu, daß die Rakelrolle in die korrekte Position übergeführt wird, ohne daß es zwischenzeitlich zu einem Durchtritt von Auftragsmasse in den Bereich hinter der Rakelrolle kommt.Characterized in that the
Es ist bereits vorgeschlagen worden, eine Rakelrolle zur Oberflächenbehandlung von Warenbahnen wahlweise vor einer quer zur Warenbahn verlaufenden Leiste oder hinter dieser anzubringen. In letzterem Fall staut die Leiste einen Substanzvorrat auf und verhindert dadurch, daß Auftragsmasse in den Bereich hinter der Walze gelangt. Die Erfindung kann so ausgestaltet werden, daß auch bei dieser Anordnung der Rakelrolle zufällige Schrägstellungen der Rakelrolle wieder aufgehoben werden, wobei die Dichtleiste ihre Funktion beibehält. Dies wird dadurch erreicht, daß vor wie hinter der Leiste schräge Anlaufflächen für die Rakelrolle vorgesehen sind.It has already been proposed to attach a doctor roll for the surface treatment of webs either in front of a strip running transversely to the web or behind it. In the latter case, the bar builds up a substance supply and thereby prevents the application mass from reaching the area behind the roller. The invention can be designed so that even with this arrangement of the doctor roller random Oblique positions of the doctor roller are removed again, the sealing strip maintaining its function. This is achieved in that inclined contact surfaces for the doctor roller are provided in front of and behind the bar.
Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert. In dieser stellt die linke Seite von Fig. 1 eine erste Ausführungsform, die rechte Seite eine zweite Ausführungsform der Erfindung gemäß der Schnittlinie I-I in Fig. 5 dar. Fig. 2 und 3 illustrieren die Funktion einer der linken Seite von Fig. 1 entsprechenden Einrichtung. Fig. 4 ist ein in Längsrichtung der Warenbahn verlaufender Vertikalschnitt, Fig. 5 die Vorderansicht des Ausführungsbeispieles gemäß der linken Seite von Fig. 1, Fig. 6 ist ein Schnitt nach der Linie VI-VI in Fig. 4.Further details of the invention will be explained with reference to the drawing. In this the left side of FIG. 1 represents a first embodiment, the right side a second embodiment of the invention according to section line II in FIG. 5. FIGS. 2 and 3 illustrate the function of a device corresponding to the left side of FIG. 1 . Figure 4 is a longitudinal direction 5 shows the front view of the exemplary embodiment according to the left-hand side of FIG. 1, FIG. 6 is a section along the line VI-VI in FIG. 4.
Die erfindungsgemäße Einrichtung nach Fig. 1 weist linke und rechte Seitenbegrenzer 16, 16' auf, welche symmetrisch ausgebildet sind und entweder beide der Ausführung nach der linken Seite von Fig. 1 oder als mögliche Variante der Ausführung gemäß der rechten Seite von Fig. 1 entsprechen. Bei dem in Fig. 1 links dargestellten Seitenbegrenzer 16 sind zwei Anlaufteile 2,11 für eine sich quer zur Warenbahn erstreckende Rakelrolle 6 vorgesehen, welche Anlaufflächen 3 und 7 für die Rakelrolle 6 aufweisen. Die aus Kunststoff bestehenden Führungskörper 2 und 11 tragen an ihrer Außenseite eine Platte 17 aus magnetisierbarem Material und sind in einer Führung 13 höhenverstellbar, deren Funktion insbesondere aus Fig. 5 und 6 zu entnehmen ist. Wesentlich für die Erfindung ist die Leiste 1 aus gummielastischem Material, deren Vorderseite 8 im unbelasteten Zustand gemäß Fig. 1 mit Abstand vor dem hinteren Ende 4, 4' der Anlaufflächen 3, 3' für eine vor der Leiste 1 angeordnete Rolle 6 verläuft. Ebenso verläuft die Rückseite 9 der Dichtleiste 1 hinter dem vorderen Ende 10, 10' der Anlaufflächen 7, 7' die wirksam werden, wenn die Rakelrolle 6 hinter der Leiste angeordnet ist (vgl. Fig. 4, strichlierte Darstellung).The device according to the invention according to FIG. 1 has left and
Bei der auf der linken Seite in Fig. 1 dargestellten Variante der Erfindung verlaufen die Anlaufflächen 7 und eine nicht dargestellte symmetrische Fläche auf der rechten Seite für die hinter der Dichtleiste 1 angeordnete Rolle parallel zu den vorderen Anlaufflächen 3, 3'. Bei der rechts dargestellten Variante ist beidseits nur ein Anlaufteil 2' vorgesehen, welcher die konvergierenden Anlaufflächen 3', 7' trägt. Diese Variante ist dann von Interesse, wenn die Rakelrolle 6 die Tendenz zeigt, gegen die Bewegungsrichtung 21 der Warenbahn sich schräg nach vorne zu verschieben.In the variant of the invention shown on the left side in FIG. 1, the contact surfaces 7 and a symmetrical surface (not shown) on the right side for the roller arranged behind the
Die Funktion der erfindungsgemäßen Einrichtung ergibt sich schematisch aus Fig. 2 und 3. Aus Fig. 2 ergibt sich, daß die elastische Leiste unter dem Druck der Rakelrolle 6 mit ihrer Vorderseite 8 bis zum Ende der Anlaufflächen 3, 3' zurückgedrängt wird. Gerät nun die Rakelrolle 6 in die in Fig. 3 dargestellte Schrägstellung, so sorgt die Anlauffläche 3 dafür, daß auf das vordere Ende der Rolle eine Kraft ausgeübt wird, welche diese wieder normal zur Warenbahn stellt. Wesentlich für die Erfindung ist, daß hiebei die Rakelrolle 6 nicht den Kontakt mit der Leiste 1 verliert. Dies wird dadurch erzielt, daß die Leiste 1 gegenüber den Anlaufteilen 2, 2' in Bewegungsrichtung verschiebbar ist und im übrigen aus verwindbarem, gummielastischem Material besteht.The function of the device according to the invention is shown schematically in FIGS. 2 and 3. From FIG. 2 it can be seen that the elastic strip under the pressure of the
Fig. 4 zeigt die erfindungsgemäße Einrichtung in Anwendung auf eine Druckeinrichtung, mit der eine auf einem Drucktuch 19 befestigte Warenbahn 5 mittels einer Rundschablone 18 behandelt wird. Die Leiste 1 ist hier in einem Klemmprofil 15 gehalten, welches mit dem Farbrohr 14, welches der Zufuhr der Auftragsmasse dient, verbunden ist. Zur Erhöhung ihrer Flexibilität ist die Leiste 1 mit einer Längsnut 12 versehen.4 shows the device according to the invention applied to a printing device with which a web 5 fastened to a
Wie insbesondere aus Fig. 5 und 6 hervorgeht, ist der Seitenbegrenzer 16, welcher die Anlaufteile 2, 11 trägt, mit seitlicher Führung 13 vertikal verschiebbar gelagert. Das Herausfallen des Seitenbegrenzers 16 wird dabei durch einen Bolzen 20 verhindert, welcher eine Öffnung 22 in einem Führungsblech 23 durchsetzt, welches in einer Ausnehmung des Seitenbegrenzers 16 geführt ist. Zur Anpressung der Rakelrolle 6 ist unterhalb des Drucktuches 19 ein Magnetbalken vorgesehen. Dieser wirkt gleichzeitig auf die Platte 17 aus magnetisierbarem Material, welche außen am Seitenbegrenzer 16 angebracht ist. Die vertikale Beweglichkeit des Seitenbegrenzers 16 führt im Zusammenwirken mit der Abrundung der Enden der Rakelrolle 6 zu einer optimalen Abdichtung, welche verhindert, daß Auftragsmasse in den Raum hinter der Rakelrolle 6 gelangt.As can be seen in particular from FIGS. 5 and 6, the
Claims (7)
- A doctor device comprising a magnetically applied doctor roller (6) which bears against a bar (1) of resilient material, which is connected to a rigid bearer, leaving its lower doctor region free, and comprising check portions (2, 2', 11) for the doctor roller (6), which are arranged adjacent the ends of the bar (1), characterised in that the bar (1) which is shorter than the doctor roller (6) is only connected to the bearer (clamping profile member 15) in the upper edge region of the bar (1) and that the check portions (2, 2', 11) have check surfaces (3, 3' and 7, 7' respectively) for the doctor roller (6), which are arranged inclinedly with respect to the axis of the roller.
- A doctor device according to claim 1 characterised in that check surfaces (3, 3' and 7, 7' respectively) are provided for the doctor roller (6) in front of and behind the bar (1).
- A doctor device according to claim 1 or claim 2 characterised in that the bar (1) is provided with at least one longitudinal groove (12).
- A doctor device according to one of claims 1 to 3 characterised in that the check portions (2, 2', 11) comprise plastics material in their part forming the check surfaces (3, 3' and 7, 7' respectively).
- A doctor device according to one of claims 1 to 4 characterised in that the check portions (2, 2', 11) are vertically freely displaceably mounted relative to the bearer of the sealing bar, for example a clamping profile member (15) which is fixed to an ink tube (14).
- A doctor device according to claim 5 characterised in that the check portions (2, 2', 11) are provided with plates (17) or the like of magnetisable material.
- A doctor device according to one of claims 1 to 6 characterised in that the ends of the doctor roller (6) are rounded in per se known manner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88110349T ATE68132T1 (en) | 1987-06-30 | 1988-06-29 | SQUEEGEE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8709028U DE8709028U1 (en) | 1987-06-30 | 1987-06-30 | |
DE8709028U | 1987-06-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0297528A1 EP0297528A1 (en) | 1989-01-04 |
EP0297528B1 true EP0297528B1 (en) | 1991-10-09 |
Family
ID=6809577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88110349A Expired - Lifetime EP0297528B1 (en) | 1987-06-30 | 1988-06-29 | Doctor device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0297528B1 (en) |
AT (1) | ATE68132T1 (en) |
DE (2) | DE8709028U1 (en) |
ES (1) | ES2027346T3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990007387A2 (en) * | 1989-01-09 | 1990-07-12 | Johannes Zimmer | Arrangement for applying substances to a web of material |
DE8912899U1 (en) * | 1989-10-28 | 1991-02-28 | Zimmer, Johannes, Klagenfurt, Kaernten, At | |
AT401622B (en) * | 1991-09-23 | 1996-10-25 | Johannes Zimmer | DEVICE FOR APPLYING A FLOWABLE VISCOSE SUBSTANCE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT347388B (en) * | 1973-10-01 | 1978-12-27 | Zimmer Johannes | DEVICE FOR AXIAL GUIDANCE OF A ROLLER IN THE SURFACE TREATMENT OF A PRODUCT WEB, A ROLLING MOVEMENT AGAINST THE WEB |
FR2321948A1 (en) * | 1975-08-27 | 1977-03-25 | Zimmer Johannes | Moving web coating device - has flexible blade retaining coating supply inside rotary stencil and magnetically attracted bar producing pressure |
AT361439B (en) * | 1975-08-27 | 1981-03-10 | Zimmer Johannes | MAGNETIC Squeegee |
AT391108B (en) * | 1986-09-19 | 1990-08-27 | Zimmer Johannes | DEVICE ON STENCIL PRINTING MACHINES, IN PARTICULAR ROTARY STENCIL PRINTING MACHINES |
-
1987
- 1987-06-30 DE DE8709028U patent/DE8709028U1/de not_active Expired
-
1988
- 1988-06-29 AT AT88110349T patent/ATE68132T1/en not_active IP Right Cessation
- 1988-06-29 EP EP88110349A patent/EP0297528B1/en not_active Expired - Lifetime
- 1988-06-29 ES ES198888110349T patent/ES2027346T3/en not_active Expired - Lifetime
- 1988-06-29 DE DE88110349T patent/DE3865378D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3865378D1 (en) | 1991-11-14 |
ES2027346T3 (en) | 1992-06-01 |
EP0297528A1 (en) | 1989-01-04 |
ATE68132T1 (en) | 1991-10-15 |
DE8709028U1 (en) | 1988-11-03 |
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