EP0092212A2 - Device for checking the ribbon feed in a ribbon cartridge - Google Patents

Device for checking the ribbon feed in a ribbon cartridge Download PDF

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Publication number
EP0092212A2
EP0092212A2 EP83103729A EP83103729A EP0092212A2 EP 0092212 A2 EP0092212 A2 EP 0092212A2 EP 83103729 A EP83103729 A EP 83103729A EP 83103729 A EP83103729 A EP 83103729A EP 0092212 A2 EP0092212 A2 EP 0092212A2
Authority
EP
European Patent Office
Prior art keywords
ribbon
supply
impeller
ink ribbon
actuating element
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.)
Granted
Application number
EP83103729A
Other languages
German (de)
French (fr)
Other versions
EP0092212A3 (en
EP0092212B1 (en
Inventor
Peter Külzer
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Siemens AG
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Siemens AG
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Publication date
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Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0092212A2 publication Critical patent/EP0092212A2/en
Publication of EP0092212A3 publication Critical patent/EP0092212A3/en
Application granted granted Critical
Publication of EP0092212B1 publication Critical patent/EP0092212B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/36—Alarms, indicators, or feed disabling devices responsive to ink ribbon breakage or exhaustion

Definitions

  • the invention relates to a device for transport monitoring according to the preamble of claim 1.
  • the object of the invention is to provide a device for monitoring the transport of a band-shaped carrier stored in a cassette, e.g. of an ink ribbon, which is simple in design and which also allows a ribbon end preview without additional effort.
  • the transport of an ink ribbon can be monitored particularly easily by the interaction of the supply roll with a deflection roller provided with an impeller, which in turn is mechanically or optically scanned.
  • the supply spool is in frictional connection with the deflection roller via the ink ribbon.
  • the supply reel itself is slidably mounted in slots in the cassette housing. With a certain remaining tape length, the core of the supply reel comes into the rotation range of the impeller, whereby it is stopped in a fluid manner. The absence of signals from the scanning device means that the tape standstill is recognized. However, the remaining length can still be unwound from the supply reel, since only the impeller and not the band itself is stopped, the band sliding over the deflection roller connected to the impeller.
  • the movement of the impeller can be sensed mechanically on the one hand in a simple manner, on the other hand by means of a reflection scanner designed as an optoelectronic sensing device.
  • An ink ribbon cassette 1 contains a supply reel with a supply reel 3 and a take-up spool 4 located on a winding core 2.
  • the supply spool is slidably guided in slots 5 of the cassette housing and is in frictional connection with a deflection roller 6.
  • Via a take-up spool, not shown here 4 driving electromotive device the ribbon is unwound from the supply reel 3 in printing operation, deflected via the guide roller 6 and spooled onto the take-up spool 4.
  • a device for transport monitoring which consists of an impeller 7 connected to the deflection roller 6, each with three actuating elements and a scanning device which scans the movement of these actuating elements and converts them into an electrical signal.
  • This scanning device essentially consists of a conical feeler mandrel 8 which is fastened on a spring plate 9 arranged in the bottom of the cassette holder.
  • the spring plate 9 has a tab 10 at its end, which engages in the signal path of a light barrier 11.
  • the deflection roller 6 with the impeller 7 is moved over the ink ribbon 12.
  • the wings (actuating elements) of the impeller 7 slide over the truncated cone of the feeler mandrel 8 and press the feeler mandrel and thus the tab 10 into the signal path of the light barrier 11 (shown in broken lines).
  • the signals emanating from the light barrier 11 are evaluated via a circuit arrangement, not shown here. Becomes if the movement of the ink ribbon 12 is interrupted by a torn ribbon or by jamming, the light barrier 11 is not actuated further and the subsequent evaluation circuit reports this fault.
  • the movement of the impeller 7 can also be sensed directly via a generally known reflection scanner, not shown here.

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  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

Zur Transportüberwachung des Farbbandes in einer Farbbandkassette wird das Farbband über eine Umlenkrolle geführt, die als Flügelrad ausgebildet ist. Die Bewegung des Flügelrades wird über eine mechanische oder elektro-optische Abtasteinrichtung abgetastet. Nach Erreichen eines bestimmten Abspulzustandes der Vorratsspule gerät der Kern der Vorratsspule in den Eingriffsbereich des Flügelrades, wodurch ein Restvorrat an Farbband angezeigt wird. Der Restvorrat an Farbband kann bei blockiertem Flügelrad vollends von der Vorratsspule abgespult werden.To monitor the transport of the ink ribbon in an ink ribbon cassette, the ink ribbon is guided over a deflection roller which is designed as an impeller. The movement of the impeller is sensed by a mechanical or electro-optical scanner. After reaching a certain unwinding state of the supply spool, the core of the supply spool comes into the engagement area of the impeller, whereby a remaining supply of ink ribbon is indicated. The remaining supply of ribbon can be fully unwound from the supply spool if the impeller is blocked.

Description

Die Erfindurgbetrifft eine Vorrichtung zur Transportüberwachung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for transport monitoring according to the preamble of claim 1.

Bei Druckeinrichtungen, wie Schreibmaschinen oder Büromaschinen, die mit Farbbandkassetten arbeiten, ist es notwendig, den Farbbandtransport zu überwachen, um bei Transportstörungen oder Bandriß des Farbbandes den Abdruck von weiteren Zeichen zu unterbinden.In the case of printing devices, such as typewriters or office machines, which work with ribbon cassettes, it is necessary to monitor the ribbon transport in order to prevent the printing of further characters in the event of transport malfunctions or ribbon break.

Zu diesem Zweck ist es allgemein bekannt, das Farbband direkt abzutasten, wobei es für eine Bandende-Voranzeige einer zusätzlichen Einrichtung bedarf. Außerdem sind derartige Abtastvorrichtungen im allgemeinen aufwendig ausgestaltet.For this purpose it is generally known to scan the ribbon directly, an additional device being required for a ribbon end preview. In addition, such scanning devices are generally complex.

Aufgabe der Erfindung ist es, eine Vorrichtung zur Transportüberwachung eines in einer Kassette gelagerten bandförmigen Trägers, z.B. eines Farbbandes, bereitzustellen, die einfach ausgebildet ist und die ohne zusätzlichen Aufwand auch eine Bandendevoranzeige ermöglicht.The object of the invention is to provide a device for monitoring the transport of a band-shaped carrier stored in a cassette, e.g. of an ink ribbon, which is simple in design and which also allows a ribbon end preview without additional effort.

Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art gemäß dem kennzeichnenden Teil des Patentanspruches 1 gelöst. Weitere vorteilhafte Ausführungsformen sind in den Unteransprüchen gekennzeichnet.This object is achieved in a device of the type mentioned at the outset according to the characterizing part of patent claim 1. Further advantageous embodiments are characterized in the subclaims.

Durch das Zusammenwirken des Vorratswickels mit einer mit einem Flügelrad versehenen Umlenkrolle, die wiederum mechanisch oder optisch abgetastet wird, kann der Transport eines Farbbandes besonders einfach überwacht werden. Die Vorratsspule befindet sich dabei über das Farbband in reibschlüssiger Verbindung mit der Umlenkrolle. Die Vorratsspule selbst ist in Schlitzen des Kassettengehäuses verschieblich gelagert. Bei einer bestimmten Bandrestlänge gerät der Kern der Vorratsspule in den Drehbereich des Flügelrades, wodurch dieses formflüssig angehalten wird. Durch das Ausbleiben der Signale der Abtasteinrichtung wird der Bandstillstand erkannt. Die Restlänge kann jedoch noch von der Vorratsspule abgespult werden, da nur das Flügelrad und nicht das Band selbst angehalten wird, wobei das Band über die mit dem Flügelrad verbundene Umlenkrolle gleitet..The transport of an ink ribbon can be monitored particularly easily by the interaction of the supply roll with a deflection roller provided with an impeller, which in turn is mechanically or optically scanned. The supply spool is in frictional connection with the deflection roller via the ink ribbon. The supply reel itself is slidably mounted in slots in the cassette housing. With a certain remaining tape length, the core of the supply reel comes into the rotation range of the impeller, whereby it is stopped in a fluid manner. The absence of signals from the scanning device means that the tape standstill is recognized. However, the remaining length can still be unwound from the supply reel, since only the impeller and not the band itself is stopped, the band sliding over the deflection roller connected to the impeller.

Die Abtastung der Bewegung des Flügelrades kann einerseits in einfacher Weise über einen Fühldorn mechanisch erfolgen, andererseits über einen als optoelektronische Fühleinrichtung ausgebildeten Reflektionabtaster.The movement of the impeller can be sensed mechanically on the one hand in a simple manner, on the other hand by means of a reflection scanner designed as an optoelectronic sensing device.

Eine Ausführungsform der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden beispielsweise näher beschrieben.An embodiment of the invention is shown in the drawings and is described in more detail below, for example.

Es zeigen

  • Fig. 1 eine schematische Darstellung einer Farbbandkassette mit der Transportüberwachungsvorrichtung, teilweise in Schnittdarstellung,
  • Fig. 2 eine Seitenansicht einer in einer Kassettenbühne eingelegten Farbbandkassette teilweise in Schnittdarstellung und
  • Fig. 3 eine schematische Darstellung der Eingriffsverhältnisse zwischen dem Flügelrad und der Vorratsspule bei Bandendevoranzeige.
Show it
  • 1 is a schematic representation of an ink ribbon cassette with the transport monitoring device, partly in a sectional view,
  • Fig. 2 is a side view of a ribbon cassette inserted in a cassette stage, partly in a sectional view and
  • Fig. 3 is a schematic representation of the engagement ratios between the impeller and the supply reel in advance display.

Eine Farbbandkassette 1 enthält eine Vorratsspule mit einem auf einem Wickelkern 2 befindlichen Vorratswickel 3 und einer Aufnahmespule 4. Die Vorratsspule ist dabei in Schlitzen 5 des Kassettengehäuses verschieblich geführt und befindet sich in reibschlüssiger Verbindung mit einer Umlenkrolle 6. Über eine hier nicht dargestellte, die Aufnahmespule 4 antreibende elektromotorische Einrichtung wird im Druckbetrieb das Farbband von dem Vorratswickel 3 abgewickelt, über die Umlenkrolle 6 umgelenkt und auf der Aufnahme spule 4 aufgespult.An ink ribbon cassette 1 contains a supply reel with a supply reel 3 and a take-up spool 4 located on a winding core 2. The supply spool is slidably guided in slots 5 of the cassette housing and is in frictional connection with a deflection roller 6. Via a take-up spool, not shown here 4 driving electromotive device, the ribbon is unwound from the supply reel 3 in printing operation, deflected via the guide roller 6 and spooled onto the take-up spool 4.

Zur Transportüberwachung des Farbbandes im Druckbetrieb und zur Bandendevoranzeige ist eine Vorrichtung zur Transportüberwachung angeordnet, die aus einem mit der Umlenkrolle 6 verbundenen Flügelrad 7 mit jeweils drei Betätigungselementen und einer die Bewegung dieser Betätigungselemente abtastende und in ein elektrisches Signal umsetzende Abtasteinrichtung. Diese Abtasteinrichtung besteht im wesentlichen aus einem kegelförmigen Fühldorn 8, der auf einem im Boden der Kassettenaufnahme angeordneten Federplatte 9 befestigt ist. Die Federplatte 9 weist an ihrem Ende eine Lasche 10 auf, die in die Signalstrecke einer Lichtschranke 11 eingreift.For transport monitoring of the ink ribbon in printing operation and for the end of ribbon display, a device for transport monitoring is arranged which consists of an impeller 7 connected to the deflection roller 6, each with three actuating elements and a scanning device which scans the movement of these actuating elements and converts them into an electrical signal. This scanning device essentially consists of a conical feeler mandrel 8 which is fastened on a spring plate 9 arranged in the bottom of the cassette holder. The spring plate 9 has a tab 10 at its end, which engages in the signal path of a light barrier 11.

Bei der Bewegung des Farbbandes von der Vorratsspule zur Aufwickelspule über die elektromotorische Einrichtung der Aufwickelspule 4 wird über das Farbband 12 die Umlenkrolle 6 mit dem Flügelrad 7 bewegt. Die Flügel (Betätigungselemente) des Flügelrades 7,gleiten über den Kegelstumpf des Fühldornes 8 und drücken den Fühldorn und damit die Lasche 10 in die Signalstrecke der Lichtschranke 11 (gestrichelt dargestellt). Die von der Lichtschranke 11 ausgehenden Signale werden über eine hier nicht dargestellte Schaltungsanordnung ausgewertet. Wird die Bewegung des Farbbandes 12 durch Bandriß oder durch Verklemmen unterbrochen, so erfolgt keine weitere Betätigung der Lichtschranke 11 und die nachfolgende Auswerteschaltung meldet diese Störung.When the ink ribbon moves from the supply spool to the take-up spool via the electromotive device of the take-up spool 4, the deflection roller 6 with the impeller 7 is moved over the ink ribbon 12. The wings (actuating elements) of the impeller 7 slide over the truncated cone of the feeler mandrel 8 and press the feeler mandrel and thus the tab 10 into the signal path of the light barrier 11 (shown in broken lines). The signals emanating from the light barrier 11 are evaluated via a circuit arrangement, not shown here. Becomes if the movement of the ink ribbon 12 is interrupted by a torn ribbon or by jamming, the light barrier 11 is not actuated further and the subsequent evaluation circuit reports this fault.

Beim Abwickeln der Vorratsspule bewegt sich die Vorratsspule unter der Wirkung einer hier nicht dargestellten Feder mit ihrem Wickelkern 2 entlang des Führungsschlitzes 5 des Kassettengehäuses. Nach Erreichen eines bestimmten Abspulzustandes der Vorratsspule gerät entsprechend der Darstellung der Fig.3 der Kern 2 der Vorratsspule in den Eingriffsbereich des Flügelrades 7, wodurch das Flügelrad 7 blockiert wird. Durch das Ausbleiben der Signale der Lichtschranke 11 wird der Bandstillstand und damit vor dem eigentlichen vollständigen Verbrauch des Farbbandes ein gewisser Restvorrat an Farbband angezeigt. Dieser Restvorrat an Farbband kann trotz der Blockierung des Flügelrades 7 weiter abgespult werden, wobei das Farbband 12 über die blockierte Führungsrolle 6 gleitet.When the supply reel is being unwound, the supply reel with its winding core 2 moves under the action of a spring (not shown here) along the guide slot 5 of the cassette housing. After reaching a certain unwinding state of the supply spool, the core 2 of the supply spool enters the engagement area of the impeller 7, as shown in FIG. 3, whereby the impeller 7 is blocked. Due to the absence of the signals from the light barrier 11, the ribbon standstill and thus a certain remaining supply of ribbon are indicated before the ribbon is actually completely used up. This remaining supply of ink ribbon can be unwound despite the blocking of the impeller 7, the ink ribbon 12 sliding over the blocked guide roller 6.

Anstelle der mechanischen Überwachung des Farbbandtransportes über den Führungsdorn 8 kann die Abtastung der Bewegung des Flügelrades 7 auch direkt über einen allgemein bekannten, hier nicht dargestellten Reflexionsabtaster erfolgen.Instead of the mechanical monitoring of the ribbon transport via the guide mandrel 8, the movement of the impeller 7 can also be sensed directly via a generally known reflection scanner, not shown here.

Claims (6)

1. Vorrichtung zur Transportüberwachung eines, über eine sich in reibschlüssiger Verbindung mit in Schlitzen eines Kassettengehäuses verschieblich gelagerten Vorratsspule befindlichen Umlenkrolle geführten, von der Vorratsspule zu einer Aufwickelspule bewegten, bandförmigen Trägers, insbesondere eines Farbbandes, dadurch gekennzeichnet, daß ein mit der Umlenkrolle (6) formschlüssig verbundenes, im axialer. Abstand zur Achse der Umlenkrolle (6) angeordnetes Betätigungselement. (7) und eine die Bewegung des Betätigungselementes abtastende und in ein elektrisches Signal umsetzende Abtasteinrichtung vorgesehen sind, wobei die Vorratsspule (2,3) und die Umlenkrolle (6) innerhalb des Kassettengehäuses derart angeordnet sind, daß nach Erreichen eines bestimmten Abspulzustandes der Vorratsspule (2,3) der Kern (2) der Vorratsspule in den Eingriffsbereich des Betätigungselementes (7) gerät und damit die Bewegung des Betätigungselementes (7) hemmt.1. Device for monitoring the transport of a strip-shaped carrier, in particular an ink ribbon, which is guided by a supply roller that is movably mounted in slots of a cassette housing and that is guided by the supply spool to a take-up spool, in particular an ink ribbon, characterized in that a with the deflection roller (6 ) positively connected, in the axial. Distance to the axis of the deflection roller (6) arranged actuating element. (7) and a scanning device which scans the movement of the actuating element and converts it into an electrical signal, the supply spool (2, 3) and the deflection roller (6) being arranged within the cassette housing in such a way that after a certain unwinding state of the supply spool ( 2,3) the core (2) of the supply coil comes into the engagement area of the actuating element (7) and thus inhibits the movement of the actuating element (7). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Betätigungselement als Flügelrad (7) ausgebildet ist.2. Device according to claim 1, characterized in that the actuating element is designed as an impeller (7). 3. Vorrichtung nach Anspruch 1 oder 2. dadurch gekennzeichnet, daß axial zur Achse der Umlenkrolle (6) ein entgegen einer Federkraft (9) verschieblich gelagertes, im Eingriffsbereich des Betätigungselementes befindlicher Fühldorn (8) angeordnet ist.3. Apparatus according to claim 1 or 2, characterized in that axially to the axis of the deflecting roller (6) against a spring force (9) slidably mounted, located in the engagement area of the actuating mandrel (8) is arranged. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der als Kegelstumpf ausgebildete Fühldorn (8) auf einer in der Kassettenaufnahme angeordneten Federplatte (9) befestigt ist.4. The device according to claim 3, characterized in that the designed as a truncated cone mandrel (8) is mounted on a spring plate (9) arranged in the cassette holder. 5. Vorrichtung nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Abtasteinrichtung als Lichtschranke ist, in deren Signalstrecke eine mit den Fühldorn verbundene Lasche eingreift.5. Device according to one of claims 3 or 4, characterized in that the scanning device is a light barrier, in the signal path of which a tab connected to the sensing mandrel engages. 6. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Abtasteinrichtung als Reflexionsabtaster ausgebildet ist.6. Device according to one of claims 1 or 2, characterized in that the scanning device is designed as a reflection scanner.
EP83103729A 1982-04-20 1983-04-18 Device for checking the ribbon feed in a ribbon cartridge Expired EP0092212B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3214548 1982-04-20
DE3214548A DE3214548C1 (en) 1982-04-20 1982-04-20 Device for monitoring the transport of an ink ribbon in an ink ribbon cassette

Publications (3)

Publication Number Publication Date
EP0092212A2 true EP0092212A2 (en) 1983-10-26
EP0092212A3 EP0092212A3 (en) 1984-11-07
EP0092212B1 EP0092212B1 (en) 1986-09-03

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ID=6161381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103729A Expired EP0092212B1 (en) 1982-04-20 1983-04-18 Device for checking the ribbon feed in a ribbon cartridge

Country Status (4)

Country Link
US (1) US4491430A (en)
EP (1) EP0092212B1 (en)
DE (1) DE3214548C1 (en)
ZA (1) ZA832747B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195975A (en) * 1984-10-12 1986-05-14 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Ribbon driving controller

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Publication number Priority date Publication date Assignee Title
IT1158826B (en) * 1983-03-07 1987-02-25 Olivetti & Co Spa BELT CARTRIDGE FOR PRINTER MACHINES
DE3544923A1 (en) * 1985-12-19 1987-07-02 Triumph Adler Ag RIBBON CASSETTE
DE3617387C1 (en) * 1986-05-23 1987-11-19 Triumph Adler Ag Ribbon cartridge
US4925121A (en) * 1986-07-01 1990-05-15 Xerox Corporation Sensing amount of medium and medium roll malfunction in a printer
FR2614704B1 (en) * 1987-04-28 1989-07-28 Aaton Sa CINEMATOGRAPHIC CAMERA USING INTERCHANGEABLE FILM STORES WITH MOVEMENT OF THE AXLES OF THE RELEASE AND RECEIVING FILM REELS
DE3718013C1 (en) * 1987-05-27 1988-11-10 Triumph Adler Ag Ribbon cassette for electronically controlled typewriters or similar office machines
DE3880694D1 (en) * 1988-07-25 1993-06-03 Siemens Ag ARRANGEMENT FOR PRINTING DEVICES FOR MONITORING PRESSURE MEDIA CONTAINING PRESSURE MEDIUM.
US5289331A (en) * 1991-06-13 1994-02-22 International Business Machines Corporation Constrained pivot guide post
JPH0577538A (en) * 1991-09-20 1993-03-30 Brother Ind Ltd Printing device
DE19549376A1 (en) * 1995-03-07 1996-09-26 Francotyp Postalia Gmbh System for thermotransfer printing procedure
DE29701808U1 (en) * 1997-02-03 1997-12-11 PSi Printer Systems international GmbH, 57080 Siegen Ribbon cassette for writing instruments, especially for matrix printers
JP4463671B2 (en) * 2004-12-20 2010-05-19 ニスカ株式会社 Ink ribbon cassette and printer

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DE3009505A1 (en) * 1980-03-12 1981-10-01 Siemens AG, 1000 Berlin und 8000 München Coloured type-ribbon cassette for teleprinter or typewriter - has post moving along slot to indicate amount of ribbon on spool
US4406554A (en) * 1980-12-02 1983-09-27 Siemens Aktiengesellschaft End of ribbon indicator for a typewriter ribbon cassette

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DE2646336C3 (en) * 1976-10-14 1979-06-28 Triumph Werke Nuernberg Ag, 8500 Nuernberg Ribbon transport device
DE2746059A1 (en) * 1977-10-13 1979-04-26 Jaroslav Radimir Vitek Web drive failure detector - uses repeat signal absence of which starts count-down to stop printing machine
US4213575A (en) * 1978-11-06 1980-07-22 International Business Machines Corporation Printer ribbon supply mechanism with end of ribbon detect expedient which reduces ribbon drag
US4406553A (en) * 1981-12-21 1983-09-27 Ncr Corporation Disposable, snap-in-type ribbon cassette having a resilient ribbon spool mounting arm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009505A1 (en) * 1980-03-12 1981-10-01 Siemens AG, 1000 Berlin und 8000 München Coloured type-ribbon cassette for teleprinter or typewriter - has post moving along slot to indicate amount of ribbon on spool
US4406554A (en) * 1980-12-02 1983-09-27 Siemens Aktiengesellschaft End of ribbon indicator for a typewriter ribbon cassette

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195975A (en) * 1984-10-12 1986-05-14 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Ribbon driving controller

Also Published As

Publication number Publication date
ZA832747B (en) 1984-01-25
EP0092212A3 (en) 1984-11-07
US4491430A (en) 1985-01-01
EP0092212B1 (en) 1986-09-03
DE3214548C1 (en) 1983-11-17

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