EP0306588A1 - Ink ribbon device for a printer, particularly a matrix printer - Google Patents

Ink ribbon device for a printer, particularly a matrix printer Download PDF

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Publication number
EP0306588A1
EP0306588A1 EP87730102A EP87730102A EP0306588A1 EP 0306588 A1 EP0306588 A1 EP 0306588A1 EP 87730102 A EP87730102 A EP 87730102A EP 87730102 A EP87730102 A EP 87730102A EP 0306588 A1 EP0306588 A1 EP 0306588A1
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EP
European Patent Office
Prior art keywords
ink ribbon
ribbon cassette
ribbon
printer
pivot lever
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.)
Withdrawn
Application number
EP87730102A
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German (de)
French (fr)
Inventor
Dieter Beck
Werner Panzer
Erich Steppe
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to EP87730102A priority Critical patent/EP0306588A1/en
Publication of EP0306588A1 publication Critical patent/EP0306588A1/en
Withdrawn legal-status Critical Current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
    • B41J35/16—Multicolour arrangements

Definitions

  • the invention relates to an ink ribbon device for printers, in particular for matrix printers, with an ink ribbon cassette mounted between the side boards of a printer frame and pivotable about a horizontal axis and with means for raising and lowering the ink ribbon cassette.
  • the invention is therefore based on the object of making a wobble device simpler, i.e. without rail and roller, without adding complex components.
  • the object is achieved in that at least one pivot lever, which engages under the ribbon cassette, is rotatably mounted on the printer frame with a plurality of switching stages for different pivot positions of the ribbon cassettes.
  • This simple design avoids that of Wobble devices known from rails and guide rollers and still allows utilization of the full color range.
  • a particular advantage of the ribbon device is the space saving and the cost saving. Elaborate components of any kind are avoided.
  • the ribbon device can be made so narrow that an unused space between the ribbon cassette and the side board is sufficient for its accommodation.
  • the space utilization is achieved in particular in that the swivel lever can be swiveled parallel to a side plate.
  • the switching stages of the pivot lever consist of cam surfaces which are arranged at different distances from the pivot axis. In contrast to a cam curve, the cam surfaces effect a specific adjustment of the swivel angle of an ink ribbon cassette.
  • This secure support between the ribbon cassette and the cam surface can be further improved in that the cam surfaces engage under a projection arranged on the ribbon cassette.
  • pivot lever according to the invention is facilitated without particularly great effort in terms of parts and without particularly great assembly effort in that the pivot lever is rotatably mounted in the side plate and that a hub is formed on the pivot lever, into which an axial locking device which can be locked into the hub from the outside can be inserted.
  • the assembly is also particularly accelerated by the fact that the axial lock that can be snapped into the hub is additionally provided with off-center hook parts that can be snapped into recesses in the side plate and at the same time form stop surfaces for the swivel lever.
  • the matrix printer frame 1 consists of the two side boards 2 and 3, between which a front guide axis 4 and a rear guide axis 5 run.
  • a pressure abutment 6 is located in the region of the front guide axis 4.
  • a slide 7 is guided on the guide axes 4 and 5, on which there is a print head 8, for example a matrix needle print head.
  • the ink ribbon is driven by friction rollers (not visible) arranged on the vertical axes 10 and 11.
  • the ink ribbon cassette 9 is mounted so that it can be swiveled up and down about a horizontal axis 12.
  • the means for lifting and swiveling the ink ribbon cassette 9 consist of a flat swivel lever 13 which has a plurality of switching stages 14 (FIG. 2).
  • the switching stages 14 require different swivel positions 15 and 15.1, from which the swivel position 15 is drawn out and the swivel position 15.1 is drawn with dashed lines with respect to the swivel lever 13 and the ribbon cassette 9.
  • These switching stages 14 on the pivot lever 13 consist of cam surfaces 16a and 16b which form different distances 17 from the pivot axis 18.
  • the ribbon cassette 9 is raised to two different heights, so that a total of three ribbon positions to the print head 8 are possible.
  • cam surfaces 16a and 16b engage in the example shown on a laterally projecting projection 19 of the ribbon cassette 9.
  • the pivot lever 13 is rotatably mounted in the side plate 3 and forms a hub 20 for this purpose.
  • An axial locking device 21 that penetrates the side plate 3 or the hub 20 engages in the hub 20 from the outside (FIG. 1) , off-center hook parts 22 and 23 arranged.
  • the axial lock 21 first has a central pin 24 with slots 25, so that when the axial lock 21 is pressed in, lateral projections 26 axially fix the pivot lever 13 in the side plate 2 or 3.
  • similar projections 27 are provided on the hook parts 22 and 23, which engage behind the side plates 2 and 3 through recesses 28.
  • the peculiarity of the hook parts 22 and 23 is that they simultaneously form stop surfaces 29 for the pivot lever 13 and are also designed as a detent (Fig. 2).

Abstract

The ink ribbon device features an ink ribbon cassette (9) capable of pivoting about a horizontal axis (12) and mounted between the side-members (2, 3) of a printer frame (1), and, additionally, means to raise and lower the ink ribbon cassette (9). In order to fully utilise all possible printing tracks on an ink ribbon it is proposed that at least one pivoted lever (13) extending beneath the ink ribbon cassette (9) is mounted so as to pivot on the printer frame (1) with several setting points (14) for different pivot positions (15, 15.1) of the ink ribbon cassette (9). In this way, all the printing tracks of the ink ribbon are used with the smallest possible expenditure on components. <IMAGE>

Description

Die Erfindung betrifft eine Farbbandeinrichtung für Drucker, insbesondere für Matrixdrucker mit einer zwischen den Seitenplatinen eines Druckerrahmens gelagerten, um eine horizontale Achse schwenkbaren Farbbandkassette und mit Mitteln zum Anheben und Absenken der Farbbandkassette.The invention relates to an ink ribbon device for printers, in particular for matrix printers, with an ink ribbon cassette mounted between the side boards of a printer frame and pivotable about a horizontal axis and with means for raising and lowering the ink ribbon cassette.

In Druckern, in denen ein Farbband mit mehreren Schreibspuren an dem Druckkopf vorbeigeführt wird, sind Einrichtungen vorgesehen, die das Farbband anheben und absenken, um eine vollständige Ausnutzung aller Schreibspuren bzw. der vollständigen Farbbandbreite zu gewährleisten. Für eine solche sogenannte Wobbelvorrichtung ist eine besondere Schiene erforderlich, auf der eine Farbbandführung auf- und abbewegt wird. Die Länge der Schiene muß der vollen Breite des Druckers entsprechen und in den Seitenwänden gelagert sein. Am Gestell der Farbbandführung befindet sich außerdem eine auf der Schiene aufgestützte Rolle, die drehbar an dem Gestell gelagert sein muß. Es versteht sich von selbst, daß die genannte Schiene einen Raum zwischen den Seitenplatinen eines Druckerrahmens beansprucht und demzufolge die Anordnung bzw. Ausgestaltung des Druckers beeinflußt bzw. den vorweggenommenen Raum für andere Bauelemente, Baugruppen u. dgl. belegt.In printers in which an ink ribbon with a plurality of writing tracks is guided past the printhead, devices are provided which raise and lower the ink ribbon in order to ensure that all the writing tracks or the entire ink ribbon width are fully utilized. A special rail is required for such a so-called wobble device, on which a ribbon guide is moved up and down. The length of the rail must correspond to the full width of the printer and be stored in the side walls. On the frame of the ribbon guide is also a roller supported on the rail, which must be rotatably mounted on the frame. It goes without saying that the rail mentioned takes up a space between the side boards of a printer frame and consequently influences the arrangement or design of the printer or the anticipated space for other components, assemblies and the like. Like. occupied.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Wobbeleinrichtung einfacher zu gestalten, d.h. ohne Schiene und Rolle auszukommen, ohne Hinzufügung aufwendiger Bauteile.The invention is therefore based on the object of making a wobble device simpler, i.e. without rail and roller, without adding complex components.

Die gestellte Aufgabe wird ausgehend von der eingangs genannten Farbbandeinrichtung erfindungsgemäß dadurch gelöst, daß zumindest ein die Farbbandkassette untergreifender Schwenkhebel mit mehreren Schaltstufen für unterschiedliche Schwenklagen der Farbbandkassetten am Druckerrahmen drehbar gelagert ist. Diese einfache Gestaltung vermeidet die von Wobbelvorrichtungen her bekannten Schienen und Führungsrollen und gestattet dennoch eine Ausnutzung der vollen Farbbandbreite. Ein besonderer Vorteil der Farbbandeinrichtung liegt in der Raumersparnis und in der Kostenersparnis. Aufwendige Bauteile jeglicher Art werden vermieden. Die Farbbandeinrichtung kann hierbei so schmal gebaut werden, daß ein nicht genutzter, zwischen Farbbandkassette und Seitenplatine vorhandener Zwischenraum für ihre Unterbringung ausreicht.Based on the ribbon device mentioned at the outset, the object is achieved in that at least one pivot lever, which engages under the ribbon cassette, is rotatably mounted on the printer frame with a plurality of switching stages for different pivot positions of the ribbon cassettes. This simple design avoids that of Wobble devices known from rails and guide rollers and still allows utilization of the full color range. A particular advantage of the ribbon device is the space saving and the cost saving. Elaborate components of any kind are avoided. The ribbon device can be made so narrow that an unused space between the ribbon cassette and the side board is sufficient for its accommodation.

Die Raumausnutzung wird insbesondere dadurch erreicht, daß der Schwenkhebel parallel zu einer Seitenplatine schwenkbar ist.The space utilization is achieved in particular in that the swivel lever can be swiveled parallel to a side plate.

Nach weiteren Merkmalen ist vorgesehen, daß die Schaltstufen des Schwenkhebels aus Nockenflächen bestehen, die mit unterschiedlichen Abständen zur Schwenkachse angeordnet sind. Die Nockenflächen bewirken im Gegensatz zu einer Nockenkurve eine bestimmte Einstellung des Schwenkwinkels einer Farbbandkassette.According to further features, it is provided that the switching stages of the pivot lever consist of cam surfaces which are arranged at different distances from the pivot axis. In contrast to a cam curve, the cam surfaces effect a specific adjustment of the swivel angle of an ink ribbon cassette.

Diese sichere Auflage zwischen Farbbandkassette und Nockenfläche kann weiterhin dadurch verbessert werden, daß die Nockenflächen einen an der Farbbandkassette angeordneten Vorsprung untergreifen.This secure support between the ribbon cassette and the cam surface can be further improved in that the cam surfaces engage under a projection arranged on the ribbon cassette.

Die Befestigung des erfindungsgemäßen Schwenkhebels wird ohne besonders großen Aufwand an Teilen und ohne besonders großen Montageaufwand dadurch erleichtert, daß der Schwenkhebel in der Seitenplatine drehgelagert ist und daß am Schwenkhebel eine Nabe gebildet ist, in die eine von außen in die Nabe einrastbare Axialverriegelung einsetzbar ist.The attachment of the pivot lever according to the invention is facilitated without particularly great effort in terms of parts and without particularly great assembly effort in that the pivot lever is rotatably mounted in the side plate and that a hub is formed on the pivot lever, into which an axial locking device which can be locked into the hub from the outside can be inserted.

Die Montage wird außerdem dadurch besonders beschleunigt, indem die in die Nabe einrastbare Axialverriegelung zusätzlich mit außermittigen Hakenteilen versehen ist, die in Aussparungen der Seitenplatine einrastbar sind und gleichzeitig Anschlagflächen für den Schwenkhebel bilden.The assembly is also particularly accelerated by the fact that the axial lock that can be snapped into the hub is additionally provided with off-center hook parts that can be snapped into recesses in the side plate and at the same time form stop surfaces for the swivel lever.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen

  • Fig. 1 eine Draufsicht auf einen Matrixdrucker ohne Gehäuse mit der Farbbandeinrichtung,
  • Fig. 2 eine linke Seitenansicht zu Fig. 1 auf die Farbbandkassette in verschiedenen Stellungen und
  • Fig. 3 einen horizontalen Querschnitt durch das Lager des Schwenkhebels entsprechend der Schnittangabe III - III in Fig. 2.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
  • 1 is a plan view of a matrix printer without a housing with the ribbon device,
  • Fig. 2 is a left side view of Fig. 1 on the ribbon cartridge in different positions and
  • 3 shows a horizontal cross section through the bearing of the pivoting lever in accordance with the section III - III in FIG. 2.

Der Matrixdrucker-Rahmen 1 besteht aus den zwei Seitenplatinen 2 und 3, zwischen denen eine vordere Führungsachse 4 und eine hintere Führungsachse 5 verlaufen. Im Bereich der vorderen Führungsachse 4 liegt ein Druckwiderlager 6. Auf den Führungsachsen 4 und 5 ist ein Schlitten 7 geführt, auf dem sich ein Druckkopf 8, z.B. ein Matrixnadeldruckkopf, befindet. Zwischen den Seitenplatinen 3 und 4 liegt in Längsrichtung (parallel zum Druckwiderlager 6) ortsfest eine Farbbandkassette 9, innerhalb deren ein Farbband (nicht sichtbar) bevorratet ist und durch einen Farbbandausgang 9a vorbei vor dem Druckkopf 8 und durch einen Farbbandeingang 9b im Kreislauf geführt wird. Das Farbband wird hierbei durch auf den senkrechten Achsen 10 und 11 angeordneten Reibrollen (nicht sichtbar) angetrieben. Um die volle Breite des Farbbandes vor dem Druckkopf 8 auszunutzen, ist die Farbbandkassette 9 um eine horizontale Achse 12 auf - und abschwenkbar gelagert. Die Mittel zum Anheben und Abschwenken der Farbbandkassette 9 bestehen aus einem flachen Schwenkhebel 13, der mehrere Schaltstufen 14 (Fig. 2) aufweist. Die Schaltstufen 14 bedingen unterschiedliche Schwenklagen 15 und 15.1, von denen die Schwenklage 15 ausgezogen und die Schwenklage 15.1 gestrichelt bezüglich des Schwenkhebels 13 und der Farbbandkassette 9 gezeichnet sind.The matrix printer frame 1 consists of the two side boards 2 and 3, between which a front guide axis 4 and a rear guide axis 5 run. A pressure abutment 6 is located in the region of the front guide axis 4. A slide 7 is guided on the guide axes 4 and 5, on which there is a print head 8, for example a matrix needle print head. Between the side boards 3 and 4 there is a ribbon cassette 9 in the longitudinal direction (parallel to the platen 6), within which a ribbon (not visible) is stored and which is passed through a ribbon outlet 9a in front of the print head 8 and through a ribbon inlet 9b. The ink ribbon is driven by friction rollers (not visible) arranged on the vertical axes 10 and 11. In order to use the full width of the ink ribbon in front of the print head 8, the ink ribbon cassette 9 is mounted so that it can be swiveled up and down about a horizontal axis 12. The means for lifting and swiveling the ink ribbon cassette 9 consist of a flat swivel lever 13 which has a plurality of switching stages 14 (FIG. 2). The switching stages 14 require different swivel positions 15 and 15.1, from which the swivel position 15 is drawn out and the swivel position 15.1 is drawn with dashed lines with respect to the swivel lever 13 and the ribbon cassette 9.

Diese Schaltstufen 14 bestehen am Schwenkhebel 13 aus Nockenflächen 16a und 16b, die unterschiedliche große Abstände 17 zur Schwenkachse 18 bilden. Beim Schwenken des Schwenkhebels 13 wird die Farbbandkassette 9 in zwei unterschiedliche Höhenlagen angehoben, so daß insgesamt drei Farbbandstellungen zum Druckkopf 8 möglich sind.These switching stages 14 on the pivot lever 13 consist of cam surfaces 16a and 16b which form different distances 17 from the pivot axis 18. When pivoting the pivot lever 13, the ribbon cassette 9 is raised to two different heights, so that a total of three ribbon positions to the print head 8 are possible.

Die Nockenflächen 16a und 16b greifen im dargestellten Beispiel an einem seitlich vorstehenden Vorsprung 19 der Farbbandkassette 9 an.The cam surfaces 16a and 16b engage in the example shown on a laterally projecting projection 19 of the ribbon cassette 9.

Der Schwenkhebel 13 ist in der Seitenplatine 3 drehgelagert und bildet hierzu eine Nabe 20. In die Nabe 20 greift von außen (Fig. 1) eine die Seitenplatine 3 bzw. die Nabe 20 durchdringende Axialverriegelung 21. An letzterer sind, bezogen auf die Schwenkachse 18, außermittige Hakenteile 22 und 23 angeordnet. Die Axialverriegelung 21 weist zunächst einen zentralen Zapfen 24 mit Schlitzen 25 auf, so daß beim Eindrücken der Axialverriegelung 21 seitliche Vorsprünge 26 den Schwenkhebel 13 axial in der Seitenplatine 2 bzw. 3 festlegen. Außerdem sind ähnliche Vorsprünge 27 an den Hakenteilen 22 und 23 vorgesehen, die die Seitenplatine 2 bzw. 3 durch Aussparungen 28 hintergreifen. Die Besonderheit der Hakenteile 22 und 23 besteht darin, daß diese gleichzeitig Anschlagflächen 29 für den Schwenkhebel 13 bilden und auch als Rast ausgebildet sind (Fig. 2).The pivot lever 13 is rotatably mounted in the side plate 3 and forms a hub 20 for this purpose. An axial locking device 21 that penetrates the side plate 3 or the hub 20 engages in the hub 20 from the outside (FIG. 1) , off-center hook parts 22 and 23 arranged. The axial lock 21 first has a central pin 24 with slots 25, so that when the axial lock 21 is pressed in, lateral projections 26 axially fix the pivot lever 13 in the side plate 2 or 3. In addition, similar projections 27 are provided on the hook parts 22 and 23, which engage behind the side plates 2 and 3 through recesses 28. The peculiarity of the hook parts 22 and 23 is that they simultaneously form stop surfaces 29 for the pivot lever 13 and are also designed as a detent (Fig. 2).

Claims (6)

1. Farbbandeinrichtung für Drucker, insbesondere für Matrixdrucker, mit einer zwischen den Seitenplatinen (2,3) eines Druckerrahmens (1) gelagerten, um eine horizontale Achse (12) schwenkbare Farbbandkassette (9) und Mitteln zum Anheben und Absenken der Farbbandkassette (9),
dadurch gekennzeichnet,
daß zumindest ein die Farbbandkassette (9) untergreifender Schwenkhebel (13) mit mehreren Schaltstufen (14) für unterschiedliche Schwenklagen (15,15′) der Farbbandkassette (9) am Druckerrahmen (1) drehbar gelagert ist.1. Ribbon device for printers, in particular for matrix printers, with an ink ribbon cassette (9) mounted between the side plates (2, 3) of a printer frame (1) and pivotable about a horizontal axis (12) and means for lifting and lowering the ink ribbon cassette (9) ,
characterized,
that at least one swivel lever (13) engaging under the ink ribbon cassette (9) with several switching stages (14) for different swivel positions (15, 15 ') of the ink ribbon cassette (9) is rotatably mounted on the printer frame (1). 2. Farbbandeinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Schwenkhebel (13) parallel zu einer Seitenplatine (2 bzw. 3) schwenkbar ist.2. Ribbon device according to claim 1,
characterized,
that the pivot lever (13) can be pivoted parallel to a side plate (2 or 3). 3. Farbbandeinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Schaltstufen (14) des Schwenkhebels (13) aus Nockenflächen (16a,16b) bestehen, die mit unterschiedlichen Abständen (17) zur Schwenkachse (18) angeordnet sind.3. Ribbon device according to claim 1 or 2,
characterized,
that the switching stages (14) of the pivot lever (13) consist of cam surfaces (16a, 16b) which are arranged at different distances (17) from the pivot axis (18). 4. Farbbandeinrichtung nach den Ansprüchen 1 bis 3,
dadurch gekennzeichnet,
daß die Nockenflächen (16a,16b) einen an der Farbbandkassette (9) angeordneten Vorsprung (19) untergreifen.4. Ribbon device according to claims 1 to 3,
characterized,
that the cam surfaces (16a, 16b) engage under a projection (19) arranged on the ink ribbon cassette (9). 5. Farbbeinrichtung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß der Schwenkhebel (13) in der Seitenplatine (2 bzw. 3) drehgelagert ist und daß am Schwenkhebel (13) eine Nabe (20) gebildet ist, in die eine von außen in die Nabe (20) einrastbare Axialverriegelung (21) einsetzbar ist.5. Farbbeinrichtung according to claims 1 to 4,
characterized,
that the pivot lever (13) is rotatably mounted in the side plate (2 or 3) and that a hub (20) is formed on the pivot lever (13), into which an axial locking device (21) which can be latched from the outside into the hub (20) can be inserted . 6. Farbbandeinrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß die in die Nabe (20) einrastbare Axialverriegelung (21) zusätzlich mit außermittigen Haken (22,23) versehen ist, die in Aussparungen (28) der Seitenplatine (2 bzw. 3) einrastbar sind und gleichzeitig Anschlagflächen (29) für den Schwenkhebel (13) bilden.6. Ribbon device according to claim 5,
characterized,
that the axial lock (21) which can be snapped into the hub (20) is additionally provided with off-center hooks (22, 23) which can be snapped into recesses (28) in the side plate (2 or 3) and at the same time stop surfaces (29) for the swivel lever (13) form.
EP87730102A 1987-09-09 1987-09-09 Ink ribbon device for a printer, particularly a matrix printer Withdrawn EP0306588A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP87730102A EP0306588A1 (en) 1987-09-09 1987-09-09 Ink ribbon device for a printer, particularly a matrix printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87730102A EP0306588A1 (en) 1987-09-09 1987-09-09 Ink ribbon device for a printer, particularly a matrix printer

Publications (1)

Publication Number Publication Date
EP0306588A1 true EP0306588A1 (en) 1989-03-15

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ID=8198359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730102A Withdrawn EP0306588A1 (en) 1987-09-09 1987-09-09 Ink ribbon device for a printer, particularly a matrix printer

Country Status (1)

Country Link
EP (1) EP0306588A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158963A2 (en) * 1984-04-16 1985-10-23 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Multicolour inked ribbon cartridge and related positioning mechanism for an impact serial printer
US4601596A (en) * 1983-03-07 1986-07-22 Ing. C. Olivetti & C., S.P.A. Typing and erasing device for printing machines
EP0221836A2 (en) * 1985-10-31 1987-05-13 MANNESMANN Aktiengesellschaft Shift mechanism for a multi-zone ink ribbon in a matrix printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601596A (en) * 1983-03-07 1986-07-22 Ing. C. Olivetti & C., S.P.A. Typing and erasing device for printing machines
EP0158963A2 (en) * 1984-04-16 1985-10-23 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Multicolour inked ribbon cartridge and related positioning mechanism for an impact serial printer
EP0221836A2 (en) * 1985-10-31 1987-05-13 MANNESMANN Aktiengesellschaft Shift mechanism for a multi-zone ink ribbon in a matrix printer

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