EP0620344B1 - Coupling device of a sliding bar or a driver fitting for a locking bar of a window or a door, the locking bar being guided in grooves - Google Patents

Coupling device of a sliding bar or a driver fitting for a locking bar of a window or a door, the locking bar being guided in grooves Download PDF

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Publication number
EP0620344B1
EP0620344B1 EP94101346A EP94101346A EP0620344B1 EP 0620344 B1 EP0620344 B1 EP 0620344B1 EP 94101346 A EP94101346 A EP 94101346A EP 94101346 A EP94101346 A EP 94101346A EP 0620344 B1 EP0620344 B1 EP 0620344B1
Authority
EP
European Patent Office
Prior art keywords
locking bar
bar
tongues
coupling device
push rod
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
Application number
EP94101346A
Other languages
German (de)
French (fr)
Other versions
EP0620344A1 (en
Inventor
Rüdiger Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schueco International KG
Original Assignee
Schueco International KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schueco International KG filed Critical Schueco International KG
Publication of EP0620344A1 publication Critical patent/EP0620344A1/en
Application granted granted Critical
Publication of EP0620344B1 publication Critical patent/EP0620344B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/48—Suspension arrangements for wings allowing alternative movements
    • E05D15/52—Suspension arrangements for wings allowing alternative movements for opening about a vertical as well as a horizontal axis
    • E05D15/5205—Suspension arrangements for wings allowing alternative movements for opening about a vertical as well as a horizontal axis with horizontally-extending checks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C9/00—Arrangements of simultaneously actuated bolts or other securing devices at well-separated positions on the same wing
    • E05C9/20—Coupling means for sliding bars, rods, or cables
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
    • E05Y2900/148—Windows

Definitions

  • the invention relates to an arrangement of a locking rod to be guided in grooves in a window or a door and a drive element which is coupled to the locking rod by means of a coupling device, in which the drive element is designed as a push rod or as a fitting driver and molded parts of the push rod or the fitting driver Limit the space for a bar on the locking bar.
  • a lock is required, which in the known construction is formed by a web which is embossed in the center of the push rod and which engages over the end of the locking bar in the aligned position of the locking bar to the push rod.
  • the end of the locking bar is formed by a web-shaped arm. This locking is intended to limit the load on the bolt as pure shear force. The locking results in an increased manufacturing effort.
  • the invention has for its object to design an arrangement of the type mentioned so that the manufacturing cost for the coupling device is low and Forces introduced via the locking bar almost directly into the push rod or the fitting driver as pure compressive forces.
  • the receiving space is formed by two molded parts, which are designed as punched and shaped tabs from the material of the push rod or the fitting driver, are inclined to the level of the push rod or the fitting driver and limit the receiving space with their free end faces.
  • the push rod is designed as a flat strip or as a profile rail, from which or from which the tabs are punched and shaped.
  • the push rod can be manufactured in one operation.
  • FIG. 1 shows a window frame 1 and a wing 3 of a window or a door equipped with a pane 2.
  • the casement is equipped with a receiving groove 4 for fittings, in which a locking bar 5 is slidably mounted and is coupled and connected by means of fitting parts also provided in the groove 4.
  • Figures 2 and 3 show an opening device for rotatable and tiltable Windows and doors with a push rod 6, which is slidably mounted on the underside of a housing 7 that is open on the front and on the sash frame side.
  • This push rod 6 has on one side a coupling bore 8 into which a coupling driver of another fitting part can be inserted.
  • the push rod is provided with punched-out tabs 9, 10, which, as can be seen from FIGS. 2, 4 and 5, run in an arcuate manner in vertical section.
  • the web 12 is formed in the locking bar 13 by a bore 15 arranged adjacent to the end face 14.
  • the receiving space 11 between the free edges of the tabs 9 and 10 is slightly larger at the narrowest point than the end distance of the bore 15 minus the bore radius of the bore 15.
  • the free edge 16 of the tab 9 has an arcuate course which corresponds to the inner contour of the bore 15.
  • the free edge 17 of the tab 10 has a straight course, which corresponds to the end face 14 of the locking bar.
  • the free end faces of the tabs 9 and 10 lie over the entire area on the associated surfaces of the locking bar 13, so that the force transmission between the push rod 6 and the locking bar 13 is optimal in the area of the coupling device.
  • the tabs can instead of the arched design in vertical section also only be inclined.
  • the tabs 18 and 19 are shown in the exemplary embodiment according to FIG. 7.
  • the end faces 20 and 21 of the tabs 18 and 19 do not run perpendicular to the plane of the push rod 6, but rather inclined according to the inclined position of the tabs 18 and 19. This is due to the fact that the punching of the gap between the tabs 18 and 19 takes place before the bending deformation and can only be carried out vertically.
  • the end face 20 or 21 will be inclined with only an oblique bend.
  • the coupling via the tabs 9, 10 and 18, 19 has the advantage that the forces introduced via the locking bar are not introduced into the push rod 6 as a bending load on a pin, but that the forces reach the push rod 6 almost directly as pure compressive forces .
  • the thrust force F s is approximately equal to the resulting force R.

Abstract

2.1 The coupling device is configured such that, upon manufacture of the sliding bar (6), no additional components have to be connected to the sliding bar. 2.2 The sliding bar exhibits mouldings (9,10) which are formed integrally with it and delimit a receiving space (11) for a web of the locking bar. The coupling device is used for side/bottom hung sash windows and up-and-over doors. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Anordnung einer in Nuten eines Fensters oder einer Tür zu führenden Riegelstange und eines mittels einer Kupplungseinrichtung mit der Riegelstange gekuppelten Antriebselements, bei der das Antriebselement als eine Schubstange oder als ein Beschlagmitnehmer ausgebildet ist und Formteile der Schubstange oder des Beschlagmitnehmers einen Aufnahmeraum für einen Steg der Riegelstange begrenzen.The invention relates to an arrangement of a locking rod to be guided in grooves in a window or a door and a drive element which is coupled to the locking rod by means of a coupling device, in which the drive element is designed as a push rod or as a fitting driver and molded parts of the push rod or the fitting driver Limit the space for a bar on the locking bar.

Es ist eine Anordnung der genannten Art bekannt (EP-A-0 485 936, Fig. 3 bis 5), bei der die Riegelstange mit der Schubstange mittels eines Bolzens gekoppelt ist, der durch eine Materialherausdrückung aus der Schubstange, durch ein Stanzdrücken gebildet wird. Dieses Stanzdrücken bewirkt, daß der Stanzbutzen mechanisch als ein getrenntes Bauteil anzusehen ist, das sich lediglich mittels Klemmkraft in der verbleibenden Bohrung hält. Eine materielle Einstückigkeit ist hierbei nicht gegeben.An arrangement of the type mentioned is known (EP-A-0 485 936, FIGS. 3 to 5), in which the locking bar is coupled to the push rod by means of a bolt which is formed by a material being pressed out of the push rod, by means of a stamping press . This punching press has the effect that the punching slug is to be regarded mechanically as a separate component which only remains in the remaining bore by means of a clamping force. There is no material unity.

Da solche Kupplungen im Bolzenbereich einer Biegebelastung ausgesetzt sind, kann es hier zu einem Lösen des Bolzens kommen, wenn nicht eine ausreichende Wanddicke der Schubstange und eine damit ausreichende Einstanztiefe des Bolzens gegeben ist. Zusätzlich ist eine Verriegelung erforderlich, die bei der bekannten Konstruktion durch einen mittig aus der Schubstange geprägten Steg gebildet wird, der das Riegelstangenende in der fluchtenden Lage der Riegelstange zur Schubstange übergreift. Das Riegelstangenende wird durch einen stegförmigen Ausleger gebildet. Durch diese Verriegelung soll die Belastung auf den Bolzen als reine Scherkraft begrenzt werden. Durch die Verriegelung ergibt sich ein erhöhter Fertigungsaufwand.Since such couplings are subjected to bending stress in the pin area, the pin can come loose if there is not a sufficient wall thickness of the push rod and thus a sufficient punching depth of the pin. In addition, a lock is required, which in the known construction is formed by a web which is embossed in the center of the push rod and which engages over the end of the locking bar in the aligned position of the locking bar to the push rod. The end of the locking bar is formed by a web-shaped arm. This locking is intended to limit the load on the bolt as pure shear force. The locking results in an increased manufacturing effort.

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung der eingangs genannten Art so zu gestalten, daß der Fertigungsaufwand für die Kupplungseinrichtung gering ist und die über die Riegelstange eingeleiteten Kräfte annähemd direkt als reine Druckkräfte in die Schubstange oder den Beschlagmitnehmer gelangen.The invention has for its object to design an arrangement of the type mentioned so that the manufacturing cost for the coupling device is low and Forces introduced via the locking bar almost directly into the push rod or the fitting driver as pure compressive forces.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Aufnahmeraum durch zwei Formteile gebildet ist, die als aus dem Material der Schubstange oder des Beschlagmitnehmers gestanzte und geformte Laschen gestaltet, zur Ebene der Schubstange oder des Beschlagmitnehmers geneigt sind und mit ihren freien Stimflächen den Aufnahmeraum begrenzen.This object is achieved in that the receiving space is formed by two molded parts, which are designed as punched and shaped tabs from the material of the push rod or the fitting driver, are inclined to the level of the push rod or the fitting driver and limit the receiving space with their free end faces.

Bei einer vorteilhaften Ausführungsform ist die Schubstange als Flachband oder als Profilschiene ausgebildet, aus dem bzw. aus der die Laschen gestanzt und geformt werden. Die Schubstange kann in einem Arbeitsgang hergestellt werden.In an advantageous embodiment, the push rod is designed as a flat strip or as a profile rail, from which or from which the tabs are punched and shaped. The push rod can be manufactured in one operation.

Weitere Merkmale der Erfindung ergeben sich aus den Unteransprüchen.Further features of the invention emerge from the subclaims.

Ausführungsbeispiele der erfindungsgemäßen Anordnung sind in den Zeichnungen dargestellt und werden im folgenden beschrieben.Embodiments of the arrangement according to the invention are shown in the drawings and are described below.

Es zeigen:

Figur 1
einen Blend- und einen Flügelrahmen eines Fensters im Schnitt,
Figur 2
eine mit einer Schubstange ausgerüstete Ausstellvorrichtung für dreh- und kippbare Fenster oder Türen, und zwar teilweise im Längschnitt,
Figur 3
eine Ansicht in Richtung des Pfeiles III in Fig. 2,
Figur 4
die in den Figuren 2 und 3 aufgezeigte Schubstange in perspektivischer Darstellung und in vergrößertem Maßstab,
Figur 5
eine Kopplung zwischen einer Riegelstange und einer Schubstange,
Figur 6
eine Ansicht in Richtung des Pfeiles VI in Fig. 5 und
Figur 7
ein weiteres Ausführungsbeispiel einer Schubstange, die mit einer Riegelstange gekoppelt ist, und zwar teilweise im Schnitt.
Show it:
Figure 1
a window frame and a sash in section,
Figure 2
an opening device equipped with a push rod for rotating and tilting windows or doors, partly in longitudinal section,
Figure 3
2 shows a view in the direction of arrow III in FIG. 2,
Figure 4
the push rod shown in Figures 2 and 3 in perspective and on an enlarged scale,
Figure 5
a coupling between a locking bar and a push rod,
Figure 6
a view in the direction of arrow VI in Fig. 5 and
Figure 7
a further embodiment of a push rod, which is coupled to a locking bar, partially in section.

In der Figur 1 ist ein Blendrahmen 1 und ein mit einer Scheibe 2 ausgerüsteter Flügel 3 eines Fensters oder einer Tür dargestellt. Der Flügelrahmen ist mit einer Aufnahmenut 4 für Beschläge ausgestattet, in der eine Riegelstange 5 schiebbar gelagert ist und mittels ebenfalls in der Nut 4 vorgesehenen Beschlagteilen gekuppelt und verbunden wird.1 shows a window frame 1 and a wing 3 of a window or a door equipped with a pane 2. The casement is equipped with a receiving groove 4 for fittings, in which a locking bar 5 is slidably mounted and is coupled and connected by means of fitting parts also provided in the groove 4.

Die Figuren 2 und 3 zeigen eine Ausstellvorrichtung für dreh- und kippbare Fenster und Türen mit einer Schubstange 6, die an der Unterseite eines stirnseitig und zur Flügelrahmenseite hin offenen Gehäuses 7 gleitbar gelagert ist. Diese Schubstange 6 weist an der einen Seite eine Kupplungsbohrung 8 auf, in die ein Kupplungsmitnehmer eines anderen Beschlagteiles eingeführt werden kann. Am anderen Ende ist die Schubstange mit ausgestanzten Laschen 9,10 versehen, die, wie sich aus den Fig. 2,4 und 5 ergibt, im Vertikalschnitt bogenförmig verlaufen.Figures 2 and 3 show an opening device for rotatable and tiltable Windows and doors with a push rod 6, which is slidably mounted on the underside of a housing 7 that is open on the front and on the sash frame side. This push rod 6 has on one side a coupling bore 8 into which a coupling driver of another fitting part can be inserted. At the other end, the push rod is provided with punched-out tabs 9, 10, which, as can be seen from FIGS. 2, 4 and 5, run in an arcuate manner in vertical section.

Die mit der Schubstange 6 einstückigen Laschen 9,10 begrenzen mit ihren freien Rändern einen Aufnahmeraum 11 für einen Steg 12 einer Riegelstange 13. Der Steg 12 wird bei der Riegelstange 13 durch eine benachbart der stirnseitigen Endfläche 14 angeordnete Bohrung 15 gebildet.The free edges of the tabs 9, 10 which are integral with the push rod 6 delimit a receiving space 11 for a web 12 of a locking bar 13. The web 12 is formed in the locking bar 13 by a bore 15 arranged adjacent to the end face 14.

Der Aufnahmeraum 11 zwischen den freien Kanten der Laschen 9 und 10 ist an der schmalsten Stelle geringfügig größer als der endseitige Abstand der Bohrung 15 abzüglich des Bohrungsradius der Bohrung 15.The receiving space 11 between the free edges of the tabs 9 and 10 is slightly larger at the narrowest point than the end distance of the bore 15 minus the bore radius of the bore 15.

Die freie Kante 16 der Lasche 9 weist einen bogenförmigen Verlauf auf, der der Innenkontur der Bohrung 15 entspricht.The free edge 16 of the tab 9 has an arcuate course which corresponds to the inner contour of the bore 15.

Die freie Kante 17 der Lasche 10 hat einen geradlinigen Verlauf, der der stirnseitigen Endfläche 14 der Riegelstange entspricht.The free edge 17 of the tab 10 has a straight course, which corresponds to the end face 14 of the locking bar.

Aufgrund des bogenförmigen Verlaufs der Laschen 9 und 10 im Vertikalschnitt liegen die freien Endflächen der Laschen 9 und 10 vollflächig an den zugeordneten Flächen der Riegelstange 13, so daß die Kraftübertragung zwischen der Schubstange 6 und der Riegelstange 13 im Bereich der Kupplungseinrichtung optimal ist.Due to the arcuate shape of the tabs 9 and 10 in vertical section, the free end faces of the tabs 9 and 10 lie over the entire area on the associated surfaces of the locking bar 13, so that the force transmission between the push rod 6 and the locking bar 13 is optimal in the area of the coupling device.

Die Fig. 6 zeigt, daß die Laschen 9,10 schmaler sind als der Durchmesser der Bohrung 15.6 shows that the tabs 9, 10 are narrower than the diameter of the bore 15.

Die Laschen können anstelle der im Vertikalschnitt bogenförmigen Ausbildung auch lediglich schräggestellt sein. In dieser Raumform sind die Laschen 18 und 19 in dem Ausführungsbeispiel nach der Fig. 7 dargestellt. Die Stirnflächen 20 und 21 der Laschen 18 und 19 verlaufen nicht senkrecht zur Ebene der Schubstange 6, sondern entsprechend der Schrägstellung der Laschen 18 und 19 geneigt. Dies hängt damit zusammen, daß die Stanzung des Spaltes zwischen den Laschen 18 und 19 vor der Biegeverformung erfolgt und lediglich senkrecht vorgenommen werden kann. Durch das Aufstellen der Laschen 18 und 19 wird bei lediglich schräger Biegung die endseitige Stirnfläche 20 bzw. 21 geneigt verlaufen.The tabs can instead of the arched design in vertical section also only be inclined. In this spatial form, the tabs 18 and 19 are shown in the exemplary embodiment according to FIG. 7. The end faces 20 and 21 of the tabs 18 and 19 do not run perpendicular to the plane of the push rod 6, but rather inclined according to the inclined position of the tabs 18 and 19. This is due to the fact that the punching of the gap between the tabs 18 and 19 takes place before the bending deformation and can only be carried out vertically. By setting up the tabs 18 and 19, the end face 20 or 21 will be inclined with only an oblique bend.

Das im Bereich der Kupplungseinrichtung auftretende Kräftediagramm ist in der Fig. 7 aufgezeigt.The force diagram occurring in the area of the coupling device is shown in FIG. 7.

Die Kupplung über die Laschen 9,10 bzw. 18,19 hat den Vorteil, daß die über die Riegelstange eingeleiteten Kräfte nicht als Biegebelastung eines Zapfens in die Schubstange 6 eingeleitet werden, sondern daß die Kräfte annähernd direkt als reine Druckkräfte in die Schubstange 6 gelangen.The coupling via the tabs 9, 10 and 18, 19 has the advantage that the forces introduced via the locking bar are not introduced into the push rod 6 as a bending load on a pin, but that the forces reach the push rod 6 almost directly as pure compressive forces .

Die Schubkraft Fs ist annähernd gleich der resultierend verlaufenden Kraft R.The thrust force F s is approximately equal to the resulting force R.

BezugszeichenReference numerals

11
BlendrahmenFrame
22nd
Scheibedisc
33rd
Flügelwing
44th
AufnahmenutGroove
55
RiegelstangeLocking bar
66
SchubstangePush rod
77
Gehäusecasing
88th
KupplungsbohrungClutch bore
99
LascheTab
1010th
LascheTab
1111
AufnahmeraumRecording room
1212th
Stegweb
1313
RiegelstangeLocking bar
1414
EndflächeEnd face
1515
Bohrungdrilling
1616
KanteEdge
1717th
KanteEdge
1818th
LascheTab
1919th
LascheTab
2020th
StirnflächeFace
2121
StirnflächeFace

Claims (4)

  1. An arrangement of a locking bar (5, 13) to be guided in grooves in a window or a door, and a drive element coupled to the locking bar by means of a coupling device, wherein the drive element is in the form of a thrust bar (6) or a fitment entrainment member and shaped portions of the thrust bar or the fitment entrainment member define a receiving space (11) for a leg (12) of the locking bar (13), characterised in that the receiving space (11) is formed by two shaped portions which are in the form of tongues (9, 10; 18, 19) shaped and stamped out of the material of the thrust bar (6) or the fitment entrainment member, are inclined relative to the plane of the thrust bar or the fitment entrainment member and with their free end surfaces define the receiving space (11).
  2. An arrangement according to claim 1 characterised in that the tongues (9, 10) extend arcuately in vertical section.
  3. An arrangement according to claim 2 characterised in that the free end surfaces of the tongues (9, 10) bear over the full surface thereof against the associated surfaces of the locking bar (13).
  4. An arrangement according to claim 1 characterised in that the tongues (18, 19) extend rectilinearly in vertical section and the end surfaces (20, 21) of the tongues are inclined to correspond to the inclined positioning of the tongues.
EP94101346A 1993-04-15 1994-01-29 Coupling device of a sliding bar or a driver fitting for a locking bar of a window or a door, the locking bar being guided in grooves Expired - Lifetime EP0620344B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4312293A DE4312293A1 (en) 1993-04-15 1993-04-15 Coupling device of a push rod or a fitting driver for a locking rod of a window or a door guided in grooves
DE4312293 1993-04-15

Publications (2)

Publication Number Publication Date
EP0620344A1 EP0620344A1 (en) 1994-10-19
EP0620344B1 true EP0620344B1 (en) 1996-12-27

Family

ID=6485522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101346A Expired - Lifetime EP0620344B1 (en) 1993-04-15 1994-01-29 Coupling device of a sliding bar or a driver fitting for a locking bar of a window or a door, the locking bar being guided in grooves

Country Status (3)

Country Link
EP (1) EP0620344B1 (en)
AT (1) ATE146844T1 (en)
DE (2) DE4312293A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19931718A1 (en) * 1999-07-08 2001-01-11 Winkhaus Fa August Espagnolette fitting system and gauntlet insert body therefor
DE19931719A1 (en) * 1999-07-08 2001-01-11 Winkhaus Fa August Fitting system for casement frames of a tilt-and-turn window or a tilt-and-turn door and cuff insert and connecting rod coupling body therefor
ITBO20000117A1 (en) * 2000-03-07 2001-09-07 Giesse Spa MANEUVERING GROUP FOR WINDOWS, METHOD FOR THE CREATION OF THE MANEUVERING GROUP AND MACHINE IMPLEMENTING THIS METHOD.
ITRA20110015A1 (en) * 2011-04-22 2012-10-23 Erreti Srl GROUP OF WINDOWS
CA3093608A1 (en) * 2019-09-17 2021-03-17 Truth Hardware Corporation Tie bar and guide for casement window

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485936A1 (en) * 1990-11-14 1992-05-20 Dieter Ramsauer Bar lock with detachable lock joint

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8601884U1 (en) * 1986-01-25 1987-05-27 Niederhoff & Dellenbusch Gmbh & Co, 5628 Heiligenhaus, De
DE3640500A1 (en) * 1986-11-27 1988-06-09 Siegenia Frank Kg LENGTH ADJUSTABLE ROD COUPLING

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0485936A1 (en) * 1990-11-14 1992-05-20 Dieter Ramsauer Bar lock with detachable lock joint

Also Published As

Publication number Publication date
ATE146844T1 (en) 1997-01-15
DE59401375D1 (en) 1997-02-06
EP0620344A1 (en) 1994-10-19
DE4312293A1 (en) 1994-10-20

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