EP0236776A2 - Ink ribbon mechanism for printers particularly for a matrix printer - Google Patents
Ink ribbon mechanism for printers particularly for a matrix printer Download PDFInfo
- Publication number
- EP0236776A2 EP0236776A2 EP87102001A EP87102001A EP0236776A2 EP 0236776 A2 EP0236776 A2 EP 0236776A2 EP 87102001 A EP87102001 A EP 87102001A EP 87102001 A EP87102001 A EP 87102001A EP 0236776 A2 EP0236776 A2 EP 0236776A2
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- European Patent Office
- Prior art keywords
- ribbon
- ink ribbon
- rail
- ink
- print head
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- 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.)
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- 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
- B41J35/04—Ink-ribbon guides
Definitions
- the invention relates to an ink ribbon device for printers, in particular for matrix printers, with a carriage which can be moved back and forth in front of the printing abutment and which carries a print head, with an ink ribbon cassette which is stationary on the printer frame, for a single-color ink ribbon, the course of which within the ink ribbon cartridge according to a so-called. Moebius loop is performed, the ribbon width being divided into at least two parallel color strips of the same color according to their height in front of the printing elements of the print head.
- the ribbon is circulated in order to achieve the highest possible utilization while maintaining the quality (legibility) of the printed characters.
- the ink ribbon quickly loses its color strength.
- the ribbon is divided into two color strips, so that a change from one color strip to the other is necessary. This change can now take place in that the ink ribbon is guided within the ink ribbon cassette in a so-called Moebius loop, ie when the ink ribbon is run through, the ink ribbon is turned, the previously upper ink strip becoming the lower ink strip.
- Moebius loop ie when the ink ribbon is run through, the ink ribbon is turned, the previously upper ink strip becoming the lower ink strip.
- the turning of the ribbon also leaves something to be desired, because one color strip always runs unused and the other is worn extremely accurately, so that here too the ribbon is insufficiently used.
- the invention is therefore based on the object of creating an ink ribbon device of the type mentioned at the outset, in which the ink ribbon is both turned, that is to say driven with the Moebius loop, and simultaneously wobbled.
- wobbling however, it must be ensured that the ribbon does not come out of the ribbon cassette or re-enter it at an angle that is too steep.
- a ribbon holder is provided on the print head carriage in the region facing away from the print head about an axis parallel to the slide guide axes, on which the ribbon emerging or re-entering the ribbon cassette is guided so that the ribbon can be deflected
- the ribbon holder is supported on a rail which is also parallel to the carriage guide axes and which runs between the side walls of the printer frame and that the rail has a height difference on both sides between the center of the length of the print pass, so that the ribbon holder with the longitudinally moved ribbon during a print pass can be moved.
- This solution enables an increase in the capacity of the ink ribbon through the possible use of two- and multi-stripe ink ribbons, such as four-stripe ink ribbons, and therefore leads to a significantly improved durability or utilization of such Ribbons.
- the ribbon is moved up and down here and turned inside the ribbon cassette.
- the rail be bent between the side walls of the printer, the highest point being at the center of the length of the rail.
- the ribbon gradually lowers or rises to the entrance or exit of the ribbon cassette and is therefore not impaired in its circular movement.
- the rail has a higher section in the area of the center length and then a transition with a lower section, each of which extends to the side walls. This results in a more abrupt, step-by-step shifting of the ink ribbon.
- the friction between the ribbon holder and the rail can be reduced in that the ribbon holder is supported on the rail by means of a rotatably mounted roller.
- the friction generated between the ribbon holder or the roll made of non-metallic material and the rail in the large number of print passes can be eliminated by positioning the rail in the side walls of the printer in an accurately positioned manner, the rail being connected to the side walls by a metallic conductor is in an electrically conductive connection.
- the ribbon device is advantageous for a printer (1), e.g. a matrix printer, can be used.
- the printer (1) has a print abutment (2) in front of which a print head carriage (3) can be moved back and forth with the print head (4) in a free space (5) which is formed by an ink ribbon cassette (6).
- the ink ribbon (7) (as a single-color ink ribbon) is guided within the ink ribbon cassette (6) with the course of a so-called Moebius loop, which is known in the art.
- the ribbon cassette (6) forms an input (6a) and an output (6b).
- the ribbon cassette (6) is fixed in the form of a single-color ribbon cassette by means of support pins (8a and 8b or 9a and 9b) and is fixed in open support bearings (10) of the printer frame (11).
- the width of the ink ribbon (7) is two or four times the usual color strip width, on which, for example, a column of nine printing elements (printing needles) writes printing characters.
- the division of the ribbon strips is of course not visible from the outside in a single-color ribbon.
- the print head carriage (3) is guided on carriage guide axes (12 and 13) parallel to the writing abutment (2) and is set in a reciprocating motion at constant speed by a drive (not shown).
- the ribbon (7) is also moved during these movements.
- an axis (15) parallel to the slide guide axes (12 and 13) is pivotably held on the print head slide (3) in two bearings (16a and 16b).
- a ribbon holder (17) which guides the ribbon (7) by means of a ribbon holder frame (17a), is attached to the axis (15), relatively close to the printing elements of the print head (4).
- the print head carriage (3) can be moved within the print pass length (21), the rail (20) having a height difference (23) from the center of length (22) to the side walls (11a and 11b).
- the back and forth movement of the print head carriage (3) consequently leads to an up and down movement (24).
- the highest point (25) lies on the middle length (22) of the rail (20).
- the rail (20) is bent between the side walls (11a and 11b) according to a first embodiment (Fig. 3), so that the up and down movement over the pressure pass length (21) increases or decreases.
- the rail (20) can have a consistently higher section in the area of the center length (22) (26) with subsequent transitions (27) to low sections (28), the latter extending to the side walls (11a and 11b).
- the course of the rail (20) is therefore to be regarded as a means of adjusting the ink ribbon (7) transversely to the longitudinal movement of the ink ribbon (7) according to the frequency distribution of the pressure stops by the printing elements of the print head (4) and thus the entire width of the ink ribbon ( 7) to be used economically.
- the friction of the ribbon holder (17) is reduced by the roller (19) which is rotatably mounted in a pivot bearing (29) on a bearing journal (30) fixed to the ribbon holder (17).
- the roller (19) can be crowned to further reduce friction, as can be seen in FIG. 2 on the outer circumference (31).
- the friction generated nonetheless charges the printer frame (11) electrostatically, so that the electrical charge is discharged in prescribed paths, i.e. the device must be protected against contact by the operator via the earth neutral conductor.
- the rail (20) is expediently mounted in the side walls (11a and 11b) by means of plastic caps (32) and short-circuited by means of metallic conductors (33) to the metallic side walls (11a and 11b), so that a defined current path is created here , on which the high voltage generated by friction at low currents can be derived.
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Abstract
Description
Die Erfindung betrifft eine Farbbandeinrichtung für Drucker, insbesondere für Matrixdrucker, mit einem vor dem Druckwiderlager hin- und herbewegbaren Schlitten, der einen Druckkopf trägt, mit einer auf dem Druckerrahmen ortsfesten Farbbandkassette für ein Einfarben-Farbband, dessen Verlauf innerhalb der Farbbandkassette nach einer sog. Moebius-Schleife geführt ist, wobei die Farbbandbreite in zumindest zwei parallele Farbstreifen gleicher Farbe nach ihrer Höhenlage vor den Druckelementen des Druckkopfes eingeteilt ist.The invention relates to an ink ribbon device for printers, in particular for matrix printers, with a carriage which can be moved back and forth in front of the printing abutment and which carries a print head, with an ink ribbon cassette which is stationary on the printer frame, for a single-color ink ribbon, the course of which within the ink ribbon cartridge according to a so-called. Moebius loop is performed, the ribbon width being divided into at least two parallel color strips of the same color according to their height in front of the printing elements of the print head.
Bei derartigen Farbbandeinrichtungen wird das Farbband im Kreislauf geführt, um eine möglichst hohe Ausnutzung bei gleichbleibender Qualität (Lesbarkeit) der Druckzeichen zu erreichen. Für den Fall, daß ein Farbstreifen nur für eine Druckzeichenhöhe ausgelegt ist, verliert das Farbband schnell an Farbkraft. In einem anderen Fall ist das Farbband in zwei Farbstreifen eingeteilt, so daß ein Wechsel von einem Farbstreifen auf den anderen notwendig wird. Dieser Wechsel kann nunmehr dadurch geschehen, daß das Farbband innerhalb der Farbbandkassette in einer sog. Moebius-Schleife geführt ist, d.h. bei einem Durchlauf des Farbbandes wird das Farbband gewendet, wobei der früher obere Farbstreifen zum unteren Farbstreifen wird. Jedoch läßt auch das Wenden des Farbbandes zu wünschen übrig, weil stets ein Farbstreifen unbenutzt läuft und der andere äußerst spurgenau abgenutzt wird, so daß auch hier die Ausnutzung des Farbbandes unzureichend ist.In the case of such ribbon devices, the ribbon is circulated in order to achieve the highest possible utilization while maintaining the quality (legibility) of the printed characters. In the event that an ink strip is only designed for one print character height, the ink ribbon quickly loses its color strength. In another case, the ribbon is divided into two color strips, so that a change from one color strip to the other is necessary. This change can now take place in that the ink ribbon is guided within the ink ribbon cassette in a so-called Moebius loop, ie when the ink ribbon is run through, the ink ribbon is turned, the previously upper ink strip becoming the lower ink strip. However, the turning of the ribbon also leaves something to be desired, because one color strip always runs unused and the other is worn extremely accurately, so that here too the ribbon is insufficiently used.
Es besteht sodann noch die Möglichkeit, ein zweispuriges Farbband zu wobbeln, d.h. beständig auf- und abzubewegen, so daß beide Farbstreifen übergreifend ausgenutzt werden. Man ist jedoch auch bei zweispurigen Farbbändern bemüht, einen höheren Farbband-Ausnutzungsgrad zu erreichen. Dieses gesteckte Ziel wäre jedoch nicht zu erreichen, wenn die sich auf dem Farbband notwendigerweise ergebenden sinusähnlichen Abnutzungswege bei einem Durchlauf des Farbbandes übereinander oder dicht nebeneinander zu liegen kämen, und Zwischenräume zwischen den Sinuslinien unbenutzt blieben.There is also the option of wobbling a two-track ribbon, i.e. constantly moving up and down, so that both color stripes are used across the board. However, efforts are also made to achieve a higher degree of ribbon utilization with two-track ribbons. However, this goal would not be attainable if the sine-like wear paths which necessarily resulted on the ink ribbon would lie one above the other or close to one another when the ink ribbon was run through, and gaps between the sinus lines remained unused.
Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Farbbandeinrichtung der eingangs genannten Gattung zu schaffen, bei der das Farbband sowohl gewendet, also mit der Moebius-Schleife gefahren wird, als auch gleichzeitig gewobbelt wird. Beim Wobbeln ist jedoch zu beachten, daß das Farbband nicht unter einem zu steilen Winkel aus der Farbbandkassette austritt bzw. wieder in diese eintritt.The invention is therefore based on the object of creating an ink ribbon device of the type mentioned at the outset, in which the ink ribbon is both turned, that is to say driven with the Moebius loop, and simultaneously wobbled. When wobbling, however, it must be ensured that the ribbon does not come out of the ribbon cassette or re-enter it at an angle that is too steep.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß auf dem Druckkopfschlitten ein in dem zum Druckkopf abgewandten Bereich um eine zu den Schlittenführungsachsen parallele Achse schwenkbar gelagerter Farbbandhalter vorgesehen ist, an dem das aus der Farbbandkassette austretende bzw. wieder eintretende Farbband umlenkbar geführt ist, daß der Farbbandhalter auf einer ebenfalls zu den Schlittenführungsachsen parallelen Schiene abgestützt ist, die zwischen den Seitenwänden des Druckerrahmens verläuft und daß die Schiene jeweils zwischen der Längenmitte der Druckpaßlänge nach beiden Seiten einen Höhenunterschied aufweist, so daß der Farbbandhalter mit dem längsbewegten Farbband während eines Druckpasses auf- und abbewegbar ist. Diese Lösung ermöglicht eine Kapazitätssteigerung des Farbbandes durch den möglichen Einsatz von zwei- und mehrstreifigen Farbbändern, wie z.B. von vierstreifigen Farbbändern und führt daher zu einer wesentlich verbesserten Haltbarkeit bzw. Ausnutzung solcher Farbbänder. Das Farbband wird hier auf- und abbewegt und innerhalb der Farbbandkassette gewendet.The object is achieved according to the invention in that a ribbon holder is provided on the print head carriage in the region facing away from the print head about an axis parallel to the slide guide axes, on which the ribbon emerging or re-entering the ribbon cassette is guided so that the ribbon can be deflected The ribbon holder is supported on a rail which is also parallel to the carriage guide axes and which runs between the side walls of the printer frame and that the rail has a height difference on both sides between the center of the length of the print pass, so that the ribbon holder with the longitudinally moved ribbon during a print pass can be moved. This solution enables an increase in the capacity of the ink ribbon through the possible use of two- and multi-stripe ink ribbons, such as four-stripe ink ribbons, and therefore leads to a significantly improved durability or utilization of such Ribbons. The ribbon is moved up and down here and turned inside the ribbon cassette.
In Verbesserung der Erfindung wird vorgeschlagen, daß die Schiene zwischen den Seitenwänden des Druckers gebogen geformt ist, wobei der höchste Punkt auf der Längenmitte der Schiene liegt. Hier senkt bzw. hebt sich das Farbband allmählich zum Eingang bzw. Ausgang der Farbbandkassette und wird daher in seiner Kreislaufbewegung nicht beeinträchtigt.In an improvement of the invention, it is proposed that the rail be bent between the side walls of the printer, the highest point being at the center of the length of the rail. Here the ribbon gradually lowers or rises to the entrance or exit of the ribbon cassette and is therefore not impaired in its circular movement.
Eine andere Ausgestaltung der Erfindung sieht vor, daß die Schiene im Bereich der Längenmitte einen höheren Abschnitt und an diesen mit Übergängen anschließend jeweils einen niedrigen Abschnitt, der jeweils bis zu den Seitenwänden verläuft, aufweist. Hierbei wird eine abschnittsweise, mehr sprunghafte Verlagerung des Farbbandes erzielt.Another embodiment of the invention provides that the rail has a higher section in the area of the center length and then a transition with a lower section, each of which extends to the side walls. This results in a more abrupt, step-by-step shifting of the ink ribbon.
Die Reibung zwischen Farbbandhalter und Schiene kann dadurch gesenkt werden, daß der Farbbandhalter mittels einer drehbar gelagerten Rolle auf der Schiene abgestützt ist.The friction between the ribbon holder and the rail can be reduced in that the ribbon holder is supported on the rail by means of a rotatably mounted roller.
In diesem Sinn wirkt auch, daß die den Farbbandhalter stützende Rolle ballig ausgeführt ist.In this sense it also works that the roll supporting the ribbon holder is spherical.
Die in der Vielzahl der Druckpässe erzeugte Reibung zwischen dem Farbbandhalter bzw. der Rolle aus nichtmetallischem Werkstoff und der Schiene erzeugte elektrostatische Aufladung kann beseitigt werden, indem die Schiene in den Seitenwänden des Druckers stellungsgenau gelagert ist, wobei die Schiene durch einen metallischen Leiter mit den Seitenwänden in elektrisch leitender Verbindung steht.The friction generated between the ribbon holder or the roll made of non-metallic material and the rail in the large number of print passes can be eliminated by positioning the rail in the side walls of the printer in an accurately positioned manner, the rail being connected to the side walls by a metallic conductor is in an electrically conductive connection.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:
- Fig. 1 die Farbbandeinrichtung in Seitenansicht,
- Fig. 2 die Farbbandeinrichtung in Draufsicht,
- Fig. 3 eine erste Ausführungsform der Schiene für den Farbbandhalter und
- Fig. 4 eine zweite Ausführungsform der Schiene für den Farbbandhalter.
- 1 is a side view of the ribbon device,
- 2 the ribbon device in plan view,
- Fig. 3 shows a first embodiment of the rail for the ribbon holder and
- Fig. 4 shows a second embodiment of the rail for the ribbon holder.
Die Farbbandeinrichtung ist vorteilhaft für einen Drucker (1), wie z.B. einen Matrixdrucker, einsetzbar. Der Drucker (1) besitzt ein Druckwiderlager (2), vor dem ein Druckkopfschlitten (3) mit dem Druckkopf (4) hin- und herbewegbar ist, und zwar in einem Freiraum (5), der durch eine Farbbandkassette (6) gebildet wird. Innerhalb der Farbbandkassette (6) wird das Farbband (7) (als Einfarben-Farbband) mit dem Verlauf einer sog. Moebius-Schleife geführt, die in der Fachwelt bekannt ist. Die Farbbandkassette (6) bildet einen Eingang (6a) und einen Ausgang (6b). Die Farbbandkassette (6) befindet sich in Form einer Einfarben-Farbbandkassette mittels Stützzapfen (8a und 8b bzw. 9a und 9b) ortsfest eingehängt in oben offenen Stützlagern (10) des Druckerrahmens (11).The ribbon device is advantageous for a printer (1), e.g. a matrix printer, can be used. The printer (1) has a print abutment (2) in front of which a print head carriage (3) can be moved back and forth with the print head (4) in a free space (5) which is formed by an ink ribbon cassette (6). The ink ribbon (7) (as a single-color ink ribbon) is guided within the ink ribbon cassette (6) with the course of a so-called Moebius loop, which is known in the art. The ribbon cassette (6) forms an input (6a) and an output (6b). The ribbon cassette (6) is fixed in the form of a single-color ribbon cassette by means of support pins (8a and 8b or 9a and 9b) and is fixed in open support bearings (10) of the printer frame (11).
Die Breite des Farbbandes (7) beträgt das Zwei- oder Vierfache der üblichen Farbstreifenbreite, auf der z.B. eine Spalte von neun Druckelementen (Drucknadeln) Druckzeichen schreibt. Die Einteilung der Farbbandstreifen ist bei einem einfarbigen Farbband selbstverständlich von außen nicht sichtbar.The width of the ink ribbon (7) is two or four times the usual color strip width, on which, for example, a column of nine printing elements (printing needles) writes printing characters. The division of the ribbon strips is of course not visible from the outside in a single-color ribbon.
Der Druckkopfschlitten (3) ist auf zum Schreibwiderlager (2) parallelen Schlittenführungsachsen (12 und 13) geführt und wird durch einen weiter nicht gezeigten Antrieb in hin- und hergehende Bewegungen mit konstanter Geschwindigkeit versetzt. Während dieser Bewegungen wird auch das Farbband (7) mitbewegt.The print head carriage (3) is guided on carriage guide axes (12 and 13) parallel to the writing abutment (2) and is set in a reciprocating motion at constant speed by a drive (not shown). The ribbon (7) is also moved during these movements.
In dem zum Druckkopf (4) abgewandten Bereich (14) ist eine zu den Schlittenführungsachsen (12 und 13) parallele Achse (15) auf dem Druckkopfschlitten (3) in zwei Lagern (16a und 16b) schwenkbar gehalten. Auf der Achse (15) ist ein Farbbandhalter (17) befestigt, der das Farbband (7) mittels eines Farbbandhalterrahmens (17a) führt, und zwar relativ nahe den Druckelementen des Druckkopfes (4).In the area (14) facing away from the print head (4), an axis (15) parallel to the slide guide axes (12 and 13) is pivotably held on the print head slide (3) in two bearings (16a and 16b). A ribbon holder (17), which guides the ribbon (7) by means of a ribbon holder frame (17a), is attached to the axis (15), relatively close to the printing elements of the print head (4).
Der Farbbandhalter (17) wird, falls er aus Kunststoff gefertigt und sehr leicht ist, mittels der Schenkelfeder (18) in Richtung auf die Schlittenführungsachse (13) geschwenkt und stützt sich mittels einer Rolle (19) auf eine Schiene (20), die zwischen den Seitenwänden (11a und 11b) des Druckerrahmens (11) verläuft. Der Druckkopfschlitten (3) ist innerhalb der Druckpaßlänge (21) bewegbar, wobei die Schiene (20) von der Längenmitte (22) aus jeweils bis zu den Seitenwänden (11a und 11b) einen Höhenunterschied (23) aufweist. Die Hin- und Herbewegung des Druckkopfschlittens (3) führt demzufolge zu einer Auf- und Abbewegung (24). Der höchste Punkt (25) liegt auf der Längenmitte (22) der Schiene (20).The ribbon holder (17), if it is made of plastic and is very light, is pivoted by means of the leg spring (18) in the direction of the slide guide axis (13) and is supported by a roller (19) on a rail (20) between the side walls (11a and 11b) of the printer frame (11). The print head carriage (3) can be moved within the print pass length (21), the rail (20) having a height difference (23) from the center of length (22) to the side walls (11a and 11b). The back and forth movement of the print head carriage (3) consequently leads to an up and down movement (24). The highest point (25) lies on the middle length (22) of the rail (20).
Die Schiene (20) ist zwischen den Seitenwänden (11a und 11b) nach einer ersten Ausführungsform (Fig. 3) gebogen geformt, so daß die Auf- und Abbewegung über die Druckpaßlänge (21) stetig ansteigend bzw. abfallend verläuft.The rail (20) is bent between the side walls (11a and 11b) according to a first embodiment (Fig. 3), so that the up and down movement over the pressure pass length (21) increases or decreases.
Die Schiene (20) kann nach einer zweiten Ausführungsform (Fig. 4) im Bereich der Längenmitte (22) einen gleichbleibend höheren Abschnitt (26) mit anschließenden Übergängen (27) zu niedrigen Abschnitten (28) aufweisen, wobei letztere bis zu den Seitenwänden (11a und 11b) reichen. Der Verlauf der Schiene (20) ist also als Mittel zu betrachten, das Farbband (7) entsprechend der Häufigkeitsverteilung der Druckanschläge durch die Druckelemente des Druckkopfes (4) quer zur Längsbewegung des Farbbandes (7) zu verstellen und damit die gesamte Breite des Farbbandes (7) wirtschaftlich auszunutzen.According to a second embodiment (FIG. 4), the rail (20) can have a consistently higher section in the area of the center length (22) (26) with subsequent transitions (27) to low sections (28), the latter extending to the side walls (11a and 11b). The course of the rail (20) is therefore to be regarded as a means of adjusting the ink ribbon (7) transversely to the longitudinal movement of the ink ribbon (7) according to the frequency distribution of the pressure stops by the printing elements of the print head (4) and thus the entire width of the ink ribbon ( 7) to be used economically.
Die Reibung des Farbbandhalters (17) wird durch die Rolle (19) gemindert, die in einem Drehlager (29) auf einem am Farbbandhalter (17) festen Lagerzapfen (30) drehgelagert ist. Die Rolle (19) kann zur weiteren Reibungsverminderung ballig ausgeführt sein, wie in Fig. 2 am Außenumfang (31) erkennbar ist. Die dennoch erzeugte Reibung lädt den Druckerrahmen (11) elektrostatisch auf, so daß die elektrische Ladung in vorgeschriebenen Pfaden abgeführt, d.h. das Gerät über den Erdungs-Nulleiter gegen Berührung durch den Bediener geschützt werden muß.The friction of the ribbon holder (17) is reduced by the roller (19) which is rotatably mounted in a pivot bearing (29) on a bearing journal (30) fixed to the ribbon holder (17). The roller (19) can be crowned to further reduce friction, as can be seen in FIG. 2 on the outer circumference (31). The friction generated nonetheless charges the printer frame (11) electrostatically, so that the electrical charge is discharged in prescribed paths, i.e. the device must be protected against contact by the operator via the earth neutral conductor.
Zweckmäßigerweise ist die Schiene (20) in den Seitenwänden (11a und 11b) mittels Kunststoff-Kappen (32) stellungsgenau gelagert und mittels metallischer Leiter (33) mit den metallischen Seitenwänden (11a und 11b) wieder kurzgeschlossen, so daß hier ein definierter Strompfad entsteht, auf dem die durch Reibung erzeugte Hochspannung bei kleinen Stromstärken abgeleitet werden kann.The rail (20) is expediently mounted in the side walls (11a and 11b) by means of plastic caps (32) and short-circuited by means of metallic conductors (33) to the metallic side walls (11a and 11b), so that a defined current path is created here , on which the high voltage generated by friction at low currents can be derived.
Claims (6)
dadurch gekennzeichnet,
daß auf dem Druckkopfschlitten (3) ein in dem zum Druckkopf (4) abgewandten Bereich (14) um eine zu den Schlittenführungsachsen (12,13) parallele Achse (15) schwenkbar gelagerter Farbbandhalter (17) vorgesehen ist, an dem das aus der Farbbandkassette (6) austretende bzw. wieder eintretende Farbband (7) umlenkbar geführt ist, daß der Farbbandhalter (17) auf einer ebenfalls zu den Schlittenführungsachsen (12,13) parallelen Schiene (20) abgestützt ist, die zwischen den Seitenwänden (11a,11b) des Druckerrahmens (11) verläuft und daß die Schiene (20) jeweils zwischen der Längenmitte (22) der Druckpaßlänge (21) nach beiden Seiten einen Höhenunterschied (23) aufweist, so daß der Farbbandhalter (17) mit dem längsbewegten Farbband (7) während eines Druckpasses auf- und abbewegbar ist.1. Ribbon device for printers, in particular for matrix printers, with a carriage which can be moved back and forth in front of the printing abutment and which carries a printhead, with an ink ribbon cassette which is stationary on the printer frame for a single-color ink ribbon, the course of which within the ink ribbon cartridge according to a so-called Moebius Loop is guided, the ink ribbon width being divided into at least two parallel ink strips of the same color according to their height in front of the print elements of the print head,
characterized,
that on the print head carriage (3) in the area facing away from the print head (4) (14) about an axis parallel to the slide guide axes (12,13) axis (15) pivotally mounted ribbon holder (17) is provided, on which the from the ribbon cassette (6) emerging or re-entering ink ribbon (7) is guided so that the ink ribbon holder (17) is supported on a rail (20) which is also parallel to the slide guide axes (12, 13) and which is between the side walls (11a, 11b) of the printer frame (11) and that the rail (20) has a height difference (23) between the center length (22) of the print pass length (21) on both sides, so that the ribbon holder (17) with the longitudinally moved ribbon (7) during a passport can be moved up and down.
dadurch gekennzeichnet,
daß die Schiene (20) zwischen den Seitenwänden (11a,11b) des Druckers (1) gebogen geformt ist, wobei der höchste Punkt (25) auf der Längenmitte (22) der Schiene (20) liegt.2. Ribbon device according to claim 1,
characterized,
that the rail (20) between the side walls (11a, 11b) of the printer (1) is curved, the highest point (25) being on the center length (22) of the rail (20).
dadurch gekennzeichnet,
daß die Schiene (20) im Bereich der Längenmitte (22) einen höheren Abschnitt (26) und an diesen mit Übergängen (27) anschließend jeweils einen niedrigen Abschnitt (26), der jeweils bis zu den Seitenwänden (11a,11b) verläuft, aufweist.3. Ribbon device according to claim 1,
characterized,
that the rail (20) in the region of the center length (22) has a higher section (26) and then with transitions (27) each has a lower section (26), each of which extends up to the side walls (11a, 11b) .
dadurch gekennzeichnet,
daß der Farbbandhalter (17) mittels einer drehbar gelagerten Rolle (19) auf der Schiene (20) abgestützt ist.4. Ribbon device according to claims 1 to 3,
characterized,
that the ribbon holder (17) is supported on the rail (20) by means of a rotatably mounted roller (19).
dadurch gekennzeichnet,
daß die den Farbbandhalter (17) stützende Rolle (19) ballig ausgeführt ist.5. Ribbon device according to claim 4,
characterized,
that the ribbon holder (17) supporting roller (19) is crowned.
dadurch gekennzeichnet,
daß die Schiene (20) in den Seitenwänden (11a,11b) des Druckers (1) stellungsgenau gelagert ist, wobei die Schiene (20) durch einen metallischen Leiter (33) mit den Seitenwänden (11a,11b) in elektrisch leitender Verbindung steht.6. Ribbon device according to claims 1 to 5,
characterized,
that the rail (20) in the side walls (11a, 11b) of the printer (1) is precisely positioned, the rail (20) being in electrically conductive connection with the side walls (11a, 11b) by means of a metallic conductor (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87102001T ATE90032T1 (en) | 1986-03-11 | 1987-02-12 | RIBBON EQUIPMENT FOR PRINTERS, ESPECIALLY FOR MATRIX PRINTERS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3607999 | 1986-03-11 | ||
| DE3607999A DE3607999C1 (en) | 1986-03-11 | 1986-03-11 | Ribbon device for printers, in particular for matrix printers |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0236776A2 true EP0236776A2 (en) | 1987-09-16 |
| EP0236776A3 EP0236776A3 (en) | 1989-09-06 |
| EP0236776B1 EP0236776B1 (en) | 1993-06-02 |
Family
ID=6296023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87102001A Expired - Lifetime EP0236776B1 (en) | 1986-03-11 | 1987-02-12 | Ink ribbon mechanism for printers particularly for a matrix printer |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5067833A (en) |
| EP (1) | EP0236776B1 (en) |
| JP (1) | JPS62221585A (en) |
| AT (1) | ATE90032T1 (en) |
| DE (2) | DE3607999C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874262A (en) * | 1987-04-15 | 1989-10-17 | Brother Kogyo Kabushiki Kaisha | Printer having pivotable ribbon guide |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9100721A (en) * | 1991-04-25 | 1992-11-16 | Merlin Ctc Prod | RIBBON CASSETTE. |
| DE4141458A1 (en) * | 1991-12-12 | 1993-06-17 | Mannesmann Ag | PRINTER WITH A RIBBON DEVICE |
| JP2630541B2 (en) * | 1992-11-06 | 1997-07-16 | スター精密株式会社 | Ink ribbon ribbon track switching method |
| JPH10181165A (en) * | 1996-12-27 | 1998-07-07 | Fujitsu Ltd | Ink ribbon cassette and printer |
| US6231249B1 (en) * | 1999-09-15 | 2001-05-15 | International Business Machines Corporation | Duplex printer using a ribbon shifting mechanism |
| US6583803B2 (en) | 2001-01-29 | 2003-06-24 | Zih Corporation | Thermal printer with sacrificial member |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2312314A (en) * | 1941-02-14 | 1943-03-02 | American Telephone & Telegraph | Ribbon shifting mechanism |
| US3993182A (en) * | 1975-10-14 | 1976-11-23 | Trw Inc. | Endless inked ribbon cartridge |
| US4297043A (en) * | 1978-11-01 | 1981-10-27 | Plessey Peripheral Systems | Impact printer inclined ribbon scanner |
| DE3036337A1 (en) * | 1980-09-26 | 1982-04-22 | Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg | WRITING 3 OR SIMILAR MACHINE WITH A STROKE 3 AND TRANSPORT DEVICE FOR THE RIBBON |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US677111A (en) * | 1894-04-26 | 1901-06-25 | Union Type Writer Company | Ribbon-feed mechanism for type-writers. |
| IT1059927B (en) * | 1976-04-27 | 1982-06-21 | Olivetti & Co Spa | CARTRIDGE FOR THE INK TAPE OF A CALCULATION MACHINE AND SIMILAR OFFICE MACHINE |
| DE2642540C3 (en) * | 1976-09-22 | 1984-03-22 | NCR Corp., 45479 Dayton, Ohio | Printing device |
| US4132486A (en) * | 1977-01-05 | 1979-01-02 | Bunker Ramo Corporation | Ribbon platform mechanism for extending ribbon life |
| DE7812759U1 (en) * | 1978-04-27 | 1978-08-24 | Triumph Werke Nuernberg Ag, 8500 Nuernberg | CUTTING DEVICE FOR PAPER TRAILS ON TYPE PRINTING DEVICES |
| US4279522A (en) * | 1978-12-07 | 1981-07-21 | Data Packaging Corporation | High speed printer cartridge |
| JPS6222376Y2 (en) * | 1980-09-25 | 1987-06-06 | ||
| JPS6060250U (en) * | 1983-10-03 | 1985-04-26 | アルプス電気株式会社 | printer paper feeder |
| DE3441952A1 (en) * | 1984-11-16 | 1986-05-22 | Olympia Werke Ag, 2940 Wilhelmshaven | Thermal printer |
-
1986
- 1986-03-11 DE DE3607999A patent/DE3607999C1/en not_active Expired
-
1987
- 1987-02-12 DE DE8787102001T patent/DE3786023D1/en not_active Expired - Fee Related
- 1987-02-12 AT AT87102001T patent/ATE90032T1/en not_active IP Right Cessation
- 1987-02-12 EP EP87102001A patent/EP0236776B1/en not_active Expired - Lifetime
- 1987-03-11 US US07/024,419 patent/US5067833A/en not_active Expired - Fee Related
- 1987-03-11 JP JP62054278A patent/JPS62221585A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2312314A (en) * | 1941-02-14 | 1943-03-02 | American Telephone & Telegraph | Ribbon shifting mechanism |
| US3993182A (en) * | 1975-10-14 | 1976-11-23 | Trw Inc. | Endless inked ribbon cartridge |
| US4297043A (en) * | 1978-11-01 | 1981-10-27 | Plessey Peripheral Systems | Impact printer inclined ribbon scanner |
| DE3036337A1 (en) * | 1980-09-26 | 1982-04-22 | Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg | WRITING 3 OR SIMILAR MACHINE WITH A STROKE 3 AND TRANSPORT DEVICE FOR THE RIBBON |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874262A (en) * | 1987-04-15 | 1989-10-17 | Brother Kogyo Kabushiki Kaisha | Printer having pivotable ribbon guide |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE90032T1 (en) | 1993-06-15 |
| US5067833A (en) | 1991-11-26 |
| EP0236776B1 (en) | 1993-06-02 |
| JPS62221585A (en) | 1987-09-29 |
| EP0236776A3 (en) | 1989-09-06 |
| DE3786023D1 (en) | 1993-07-08 |
| DE3607999C1 (en) | 1987-10-08 |
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