EP0360728B1 - Print head gap adjusting device for a printer, in particular for a matrix needle printer - Google Patents

Print head gap adjusting device for a printer, in particular for a matrix needle printer Download PDF

Info

Publication number
EP0360728B1
EP0360728B1 EP89730187A EP89730187A EP0360728B1 EP 0360728 B1 EP0360728 B1 EP 0360728B1 EP 89730187 A EP89730187 A EP 89730187A EP 89730187 A EP89730187 A EP 89730187A EP 0360728 B1 EP0360728 B1 EP 0360728B1
Authority
EP
European Patent Office
Prior art keywords
printer
print
print head
pair
head
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.)
Revoked
Application number
EP89730187A
Other languages
German (de)
French (fr)
Other versions
EP0360728A1 (en
Inventor
Gerhard Lohrmann
Helmut Riesenegger
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6362729&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0360728(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT89730187T priority Critical patent/ATE92402T1/en
Publication of EP0360728A1 publication Critical patent/EP0360728A1/en
Application granted granted Critical
Publication of EP0360728B1 publication Critical patent/EP0360728B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B41J25/3088—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms with print gap adjustment means on the printer frame, e.g. for rotation of an eccentric carriage guide shaft
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Definitions

  • the invention relates to a printer, in particular a dot matrix printer, with a printhead distance setting device, for adjusting the distance between the printhead and the print abutment for unevenly thick record carriers lying on the print abutment or a changing number of record carriers, with a mechanical scanning element resting on the record carrier or recorders Control of the transverse to the longitudinal direction adjustable printhead, which is arranged on a longitudinally movable printhead carriage, and with a printhead carriage, which is guided on a pair of parallel guide axes, one of which is supported by means of an eccentric pair and the other transversely in printer side walls, one on The stationary frame of the printer frame forms an actuator for the eccentric pair of the guide axis.
  • a printhead distance setting device for adjusting the distance between the printhead and the print abutment for unevenly thick record carriers lying on the print abutment or a changing number of record carriers
  • a mechanical scanning element resting on the record carrier or recorders
  • Control of the transverse to the longitudinal direction adjustable printhead
  • Such printhead spacing adjustment devices are required because of the short travel of printing elements, e.g. of printing needles, the stroke of which is approximately 0.3 to 0.5 mm.
  • the typeface generated by the print head is essentially determined by a correctly set distance between the print head and the print abutment.
  • This arrangement of the distance adjusting device on the print head carriage is not only complex and therefore uneconomical, but also increases the drive weight of the print head carriage.
  • the accuracy depends on the controllability of the electric motor that is carried on the carriage.
  • the present invention is based on the object of making the printhead spacing adjustment device simpler and lighter on a printer and of making it more precisely controllable.
  • the object is achieved according to the invention in that one by the adjusting movements of the sensing element generated electrical analog signal in converted form of an electronic digital signal in an electronic circuit for controlling the stepper motor, and that the sensing element consists of a rotatably mounted on one end of a feeler lever, acted upon by a spring force and that at the other end Indicator is provided which interacts with a sensor of the electronic circuit for the generation of the analog signal.
  • the entire printhead carriage with the printhead fixedly mounted thereon is transversely displaced, the stepping motor as an actuator not being located on the printhead carriage, so that the construction becomes simpler and lighter. Then the stepping motor can be controlled more precisely by the signal generation and signal transmission. The effort required for this is not significant. It is also important, however, that the operator is no longer left to choose the distance for the print head. An incorrect operation is therefore excluded. Such a sensing device is practically not susceptible to failure.
  • the electronic circuit for the analog signal consists of an operational amplifier connected downstream of the sensor, an analog-digital converter, a microprocessor and a driver circuit, by means of which the stepper motor can be controlled. These components can easily be arranged within a printed circuit without taking up a significant amount of space.
  • a special further development of the invention with the aim of a practical, full paper support (air bubble-free resting of the recording medium or the interference-free paper advancement or retraction) is created in that the carrier housing for the sensing roller results in a part of a guide profile, which together with a pressure abutment carrier a supply channel forms for the record carrier.
  • the transmission of the positioning movements of the stepper motor to the pair of eccentrics of the guide axis is further favored by the fact that a motor pinion of the stepper motor is provided with gears of an intermediate gear a gear segment is in drive connection, which is rotatably attached to the eccentrics of the guide axis.
  • gearwheel segment can be moved into a basic position against a stop when the stepping motor is switched on. In this case, when you switch on again, you are asked which paper thickness is available and any incorrect distance setting is corrected.
  • the printer can be a dot matrix printer, a thermal transfer printer, an ink jet printer, a bubble jet printer, a page printer or the like.
  • the printer has a print head distance setting device for setting the distance 1 between print head 2 and print abutment 3.
  • the pressure abutment 3 is advantageously designed as a pressure beam 3a with a vertically extended flat surface 3b.
  • recording media 4 can have single or multiple paper thicknesses, such as in the case of multiple paper layers (carbon copies) or different paper thicknesses. In many applications, different forms are fed to the printer from several compartments.
  • the thickness of the existing individual or the plurality of recording media 4 is automatically determined via a scanning element 5.
  • the scanning member 5 consists of a scanning roller 5a and serves to control the transverse to the longitudinal direction, i.e. Printhead 2 adjustable in the transverse direction 6.
  • the printhead 2 is fastened on a printhead carriage 7 which can be moved in the longitudinal direction.
  • the print head carriage 7 is moved back and forth in the longitudinal direction as usual in front of the platen 3 by means of a drive (not shown), the print head 2 generating characters or images on the recording medium 4 via the printing elements 2 a.
  • an ink ribbon 8 is also provided for this.
  • the print head carriage 7 is guided on a pair of parallel guide axes 9, one of which (the one shown) is provided with a pair of eccentrics 10, which form eccentric eccentrics.
  • the eccentrics of the eccentric pair 10 are each rotatably mounted in the printer side walls 32.
  • the second (not shown) guide axis (9) guides the print head carriage 7 in the vertical direction, but not in the horizontal direction.
  • an electrically generated analog signal is now generated which, after amplification and conversion into a digital signal, is used in an electronic circuit 11 for the control of a stepping motor 12 which is fixedly mounted on the printer frame.
  • the stepper motor 12 forms an actuator 13 for the eccentric pair 10 of the guide axis 9.
  • the mechanical part of the printhead gap adjuster namely the scanning member 5 carries the scanning roller 5a, which is rotatably mounted on one end 14a of a scanning lever 14, and on the other end 14b an indicator 15 is provided which cooperates with a sensor 16 of the electronic circuit 11 for the generation of the analog signal.
  • the feeler lever 14 is rotatably supported about a horizontal axis 17 in a carrier housing 18 and is pulled against the recording medium (s) 4 by means of a tension spring 14c.
  • the carrier housing 18 also houses the electronic circuit 11.
  • the sensor 16 consists of a field plate differential sensor, and the indicator 15 consists of a soft iron part.
  • the electronic circuit 11 accommodated in the carrier housing 18 is connected to the sensor 16, which generates the analog signal.
  • the sensor 16 is followed by an operational amplifier 19, an analog-digital converter 20, a microprocessor 21 and a driver circuit 22.
  • the digitized signal of the driver circuit 22 controls the stepper motor 12.
  • the driver circuit 22 is connected to the stepper motor 12 via corresponding control lines 23a and 23b.
  • the carrier housing 18 at the same time forms part of a guide profile 24 which, together with a pressure abutment carrier 25, forms a feed channel 26 for the one or more recording media 4.
  • a motor pinion 27 drives a gearwheel segment 29 via a gearwheel 28 of an intermediate gear, which gear segment 29 is fixed in a rotationally fixed manner on the eccentrics 10 of the guide axis 9.
  • the gear segment 29 can be moved against a stop 30 into the illustrated basic position 31.
  • the guide axis 9 mounted in the printer side walls 32 is adjustable by means of its pair of eccentrics 10, as a result of which the distance 1 between the print head 2 and the pressure abutment 3 is adjustable.
  • the gear segment 29, which is connected to the eccentric 10 in a rotationally fixed manner moves the guide axis 9 and thus the print head carriage 7 and thus the print head 2, so that the distance 1 changes. It is not necessary to equip both eccentrics 10 with a gear segment 29.

Abstract

A printer with a print-head distance-setting device for adjusting the distance (1) between print head (2) and print-material counter support (3) for recording-material carriers (4) of unequal thickness, resting on the print-material counter support (3), including a mechanical sensing member (5) for controlling a print head (2), adjustable in a direction perpendicular relative to the longitudinal direction of the slider carriage motion, where the print head (2) is disposed on a longitudinally movable print-head slider carriage (7), which print-head slider carriage (7) in turn is guided with a pair of parallel guide axles (9), of which one guide axle (9) is supported by way of a pair of eccentric-disposed pins (10) and of which the second guide axle (9) is cross-movably supported in the printer side walls (32). In order to achieve a simpler and more easily constructed print-head distance-setting device, which can in addition be controlled more accurately, an electrical analog signal, generatable by the setting motions of the sensing member (5), serves in a converted configuration of an electronic digital signal in an electronic circuit (11) for the control of a step motor (12), supported at a printer frame, where the step motor (12) forms a servo drive (13) for the pair of eccentric-disposed pins (10) of the guide axle (9).

Description

Die Erfindung betrifft einen Drucker, insbesondere einen Matrixnadeldrucker, mit einer Druckkopfabstandseinstelleinrichtung, zur Einstellung des Abstandes zwischen Druckkopf und Druckwiderlager für auf dem Druckwiderlager aufliegende ungleich dicke Aufzeichnungsträger oder eine wechselnde Anzahl von Aufzeichnungsträgern, mit einem auf dem oder den Aufzeichnungsträgern aufliegenden mechanischen Abtastglied, das zur Steuerung des quer zur Längsrichtung anstellbaren Druckkopfes dient, der auf einem längsbewegbaren Druckkopfschlitten angeordnet ist, und mit einem Druckkopfschlitten, der auf einem Paar paralleler Führungsachsen geführt ist, von denen eine Führungsachse mittels eines Exzenterpaares und die andere querbeweglich in Druckerseitenwänden gelagert ist, wobei ein am Druckerrahmen ortsfest gelagerter Schrittmotor einen Stelltrieb für das Exzenterpaar der Führungsachse bildet. Eine derartige Vorrichtung ist bekannt (US-A1-4,420,269). Der Aufbau einer solchen Vorrichtung kann noch einfacher gestaltet und die Steuerung muß noch genaner werden.The invention relates to a printer, in particular a dot matrix printer, with a printhead distance setting device, for adjusting the distance between the printhead and the print abutment for unevenly thick record carriers lying on the print abutment or a changing number of record carriers, with a mechanical scanning element resting on the record carrier or recorders Control of the transverse to the longitudinal direction adjustable printhead, which is arranged on a longitudinally movable printhead carriage, and with a printhead carriage, which is guided on a pair of parallel guide axes, one of which is supported by means of an eccentric pair and the other transversely in printer side walls, one on The stationary frame of the printer frame forms an actuator for the eccentric pair of the guide axis. Such a device is known (US-A1-4,420,269). The construction of such a device can be made even simpler and the control must be more precise.

Derartige Druckkopfabstandseinstellvorrichtungen sind erforderlich wegen des geringen Hubweges von Druckelementen, wie z.B. von Drucknadeln, deren Hubweg etwa 0,3 bis 0,5 mm beträgt. Das von dem Druckkopf erzeugte Schriftbild wird wesentlich durch einen richtig eingestellten Abstand zwischen Druckkopf und Druckwiderlager bestimmt.Such printhead spacing adjustment devices are required because of the short travel of printing elements, e.g. of printing needles, the stroke of which is approximately 0.3 to 0.5 mm. The typeface generated by the print head is essentially determined by a correctly set distance between the print head and the print abutment.

Es ist außerdem eine Einrichtung zur Einstellung des Abstandes eines Druckkopfes senkrecht zum Druckwiderlager bekannt (DE-C1-27 52 061), die zur veränderbaren Abstandsregelung des Druckkopfes gegenüber dem Aufzeichnungsträger in Abhängigkeit unterschiedlicher Stärken und Lagen des auf dem Druckwiderlager aufliegenden Aufzeichnungsträgers dient, bei der der Druckkopf auf dem parallel zum Druckwiderlager bewegbaren Transportschlitten durch einen von einem Elektromotor antreibbaren Exzenter verschiebbar ist, wobei der Elektromotor durch einen mechanisch-elektrischen Umsetzer steuerbar ist, der seinerseits durch die veränderbare Stärke der auf dem Druckwiderlager aufliegenden Aufzeichnungsträger beeinflußbar ist.There is also known a device for adjusting the distance of a print head perpendicular to the platen (DE-C1-27 52 061), which is used for variable distance control of the printhead relative to the record carrier depending on different thicknesses and positions of the record carrier lying on the platen, in which the print head can be moved on the transport carriage, which can be moved parallel to the platen, by an eccentric that can be driven by an electric motor, the electric motor being controllable by a mechanical-electrical converter, which in turn can be controlled by the changeable thickness of the supports on the platen Record carrier can be influenced.

Diese Anordnung der Abstandseinstellvorrichtung auf dem Druckkopfschlitten ist nicht nur aufwendig und daher unwirtschaftlich, sondern erhöht auch das Antriebsgewicht des Druckkopfschlittens. Außerdem hängt die Genauigkeit von der Steuerbarkeit des Elektromotors, der auf dem Schlitten mitgeführt wird, ab.This arrangement of the distance adjusting device on the print head carriage is not only complex and therefore uneconomical, but also increases the drive weight of the print head carriage. In addition, the accuracy depends on the controllability of the electric motor that is carried on the carriage.

Der vorliegenden Erfindung liegt demgegenüber die Aufgabe zugrunde, an einem Drucker die Druckkopfabstandseinstelleinrichtung einfacher und leichter zu gestalten und genauer steuerbar zu machen.In contrast, the present invention is based on the object of making the printhead spacing adjustment device simpler and lighter on a printer and of making it more precisely controllable.

Ausgehend von der eingangs bezeichneten Gattung, u.a. von einem Druckkopfschlitten, der auf einem Paar paralleler Führungsachsen geführt ist, von denen eine Führungsachse mittels eines Exzenterpaares und die andere querbeweglich in Druckerseitenwänden gelagert ist, wird die gestellte Aufgabe erfindungsgemäß dadurch gelöst, daß ein durch die Einstellbewegungen des Abtastgliedes erzeugbares elektrisches Analogsignal in umgewandelter Form eines elektronischen Digitalsignals in einer elektronischen Schaltung für die Steuerung des Schrittmotors dient, und daß das Abtastglied aus einer an dem einen Ende eines Tasthebels drehbar gelagerten, mit einer Federkraft beaufschlagten Tastrolle besteht und daß an dem anderen Ende ein Indikator vorgesehen ist, der mit einem Sensor der elektronischen Schaltung für die Erzeugung des Analogsignals zusammenwirkt. Vorteilhafterweise wird hier der ganze Druckkopfschlitten mit dem darauf fest gelagerten Druckkopf querverstellt, wobei der Schrittmotor als Stellantrieb sich nicht auf dem Druckkopfschlitten befindet, so daß die Bauweise einfacher und leichter wird. Sodann wird durch die Signalerzeugung und Signalübertragung der Schrittmotor genauer steuerbar. Der hierfür erforderliche Aufwand ist nicht erheblich. Von Bedeutung ist jedoch auch, daß dem Bediener nicht mehr überlassen bleibt, welchen Abstand er für den Druckkopf wählt. Eine Fehlbedienung wird demnach ausgeschlossen. Eine solche Fühleinrichtung ist praktisch nicht störanfällig.Starting from the genus described at the outset, including a printhead carriage which is guided on a pair of parallel guide axes, one of which is supported by means of an eccentric pair and the other is mounted transversely in the printer side walls, the object is achieved according to the invention in that one by the adjusting movements of the sensing element generated electrical analog signal in converted form of an electronic digital signal in an electronic circuit for controlling the stepper motor, and that the sensing element consists of a rotatably mounted on one end of a feeler lever, acted upon by a spring force and that at the other end Indicator is provided which interacts with a sensor of the electronic circuit for the generation of the analog signal. Advantageously, the entire printhead carriage with the printhead fixedly mounted thereon is transversely displaced, the stepping motor as an actuator not being located on the printhead carriage, so that the construction becomes simpler and lighter. Then the stepping motor can be controlled more precisely by the signal generation and signal transmission. The effort required for this is not significant. It is also important, however, that the operator is no longer left to choose the distance for the print head. An incorrect operation is therefore excluded. Such a sensing device is practically not susceptible to failure.

Eine vorteilhafte Ausgestaltungsform der Erfindung wird dadurch erzielt, indem die elektronische Schaltung für das Analogsignal aus einem dem Sensor nachgeschalteten Operationsverstärker, einem Analog-Digital-Wandler, einem Mikroprozessor und einer Treiberschaltung besteht, mittels deren der Schrittmotor steuerbar ist. Diese Bauelemente können leicht innerhalb einer gedruckten Schaltung angeordnet werden, ohne einen wesentlichen Bauraum zu beanspruchen.An advantageous embodiment of the invention is achieved in that the electronic circuit for the analog signal consists of an operational amplifier connected downstream of the sensor, an analog-digital converter, a microprocessor and a driver circuit, by means of which the stepper motor can be controlled. These components can easily be arranged within a printed circuit without taking up a significant amount of space.

Die einfachere Bauweise ergibt sich ferner dadurch, daß der Tasthebel und der Sensor an einem Trägergehäuse angeordnet sind, in dem auch die elektronische Schaltung angeordnet ist.The simpler design also results from the fact that the feeler lever and the sensor are arranged on a carrier housing in which the electronic circuit is also arranged.

Eine spezielle Weiterentwicklung der Erfindung mit dem Ziel einer praxisgerechten satten Papierauflage (luftblasenfreies Aufliegen des oder der Aufzeichnungsträger bzw. ein störungsfreies Papiervorschieben oder Zurückfahren) wird dadurch geschaffen, daß das Trägergehäuse für die Tastrolle einen Teil eines Leitprofils ergibt, das zusammen mit einem Druckwiderlagerträger einen Zuführungskanal für den Aufzeichnungsträger bildet.A special further development of the invention with the aim of a practical, full paper support (air bubble-free resting of the recording medium or the interference-free paper advancement or retraction) is created in that the carrier housing for the sensing roller results in a part of a guide profile, which together with a pressure abutment carrier a supply channel forms for the record carrier.

Die Übertragung der Anstellbewegungen des Schrittmotors auf das Exzenterpaar der Führungsachse wird noch dadurch begünstigt, daß ein Motorritzel des Schrittmotors über Zahnräder eines Zwischengetriebes mit einem Zahnradsegment in Antriebsverbindung steht, das drehfest auf den Exzentern der Führungsachse befestigt ist.The transmission of the positioning movements of the stepper motor to the pair of eccentrics of the guide axis is further favored by the fact that a motor pinion of the stepper motor is provided with gears of an intermediate gear a gear segment is in drive connection, which is rotatably attached to the eccentrics of the guide axis.

Vorteilhaft ist außerdem, wenn das Zahnradsegment beim Einschalten des Schrittmotors gegen einen Anschlag in eine Grundstellung bewegbar ist. In diesem Fall wird bei einem erneuten Einschaltvorgang jeweils abgefragt, welche Papierstärke vorhanden ist und eine evtl. unzutreffende Abstandseinstellung korrigiert.It is also advantageous if the gearwheel segment can be moved into a basic position against a stop when the stepping motor is switched on. In this case, when you switch on again, you are asked which paper thickness is available and any incorrect distance setting is corrected.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt und wird nachfolgend näher erläutert. Es zeigen

Fig. 1
eine Funktionsdarstellung mit den betroffenen Teilen des Druckers im Querschnitt
(Druckwiderlagerträger mit einem Druckkopfschlitten (teilweise) in Verbindung mit einem Blockschaltbild für Signaleingang und Signalausgang bzw. Signalverarbeitung).
Fig. 2
eine Einzelheit des Exzenterpaares
In the drawing, an embodiment of the invention is shown schematically and is explained in more detail below. Show it
Fig. 1
a functional representation with the affected parts of the printer in cross section
(Pressure abutment carrier with a print head carriage (partially) in connection with a block diagram for signal input and signal output or signal processing).
Fig. 2
a detail of the eccentric pair

Der Drucker kann ein Matrixnadeldrucker, ein Thermotransferdrucker, ein Tintenstrahldrucker, ein Bubble-Jet-Drucker, ein Page-Printer oder dgl. sein. Der Drucker weist eine Druckkopfabstandseinstelleinrichtung zur Einstellung des Abstandes 1 zwischen Druckkopf 2 und Druckwiderlager 3 auf. Das Druckwiderlager 3 ist vorteilhafterweise als Druckbalken 3a mit einer vertikal ausgedehnten ebenen Fläche 3b ausgeführt. Auf dem Druckwiderlager 3 liegen Aufzeichnungsträger 4 auf, die einfache oder mehrfache Papierdicke, wie z.B. bei Mehrfachpapierlagen (Durchschlägen) oder unterschiedliche Papierstärken aufweisen können. In vielen Anwendungsfällen werden dem Drucker aus mehreren Fächern verschiedene Formulare zugeführt.The printer can be a dot matrix printer, a thermal transfer printer, an ink jet printer, a bubble jet printer, a page printer or the like. The printer has a print head distance setting device for setting the distance 1 between print head 2 and print abutment 3. The pressure abutment 3 is advantageously designed as a pressure beam 3a with a vertically extended flat surface 3b. On the printing abutment 3 there are recording media 4 which can have single or multiple paper thicknesses, such as in the case of multiple paper layers (carbon copies) or different paper thicknesses. In many applications, different forms are fed to the printer from several compartments.

Die Dicke des vorhandenen einzelnen oder der Vielzahl von Aufzeichnungsträgern 4 wird automatisch über ein Abtastglied 5 ermittelt. Wie dargestellt, besteht hier das Abtastglied 5 aus einer Abtastrolle 5a und dient zur Steuerung des quer zur Längsrichtung, d.h. in Querrrichtung 6 anstellbaren Druckkopfes 2. Der Druckkopf 2 ist auf einem in Längsrichtung bewegbaren Druckkopfschlitten 7 befestigt. Der Druckkopfschlitten 7 wird mittels eines weiter nicht dargestellten Antriebs in Längsrichtung wie üblich vor dem Druckwiderlager 3 hin- und herbewegt, wobei der Druckkopf 2 über die Druckelemente 2a Schriftzeichen oder Bilder auf dem Aufzeichnungsträger 4 erzeugt. Bei Matrixnadeldruckern ist hierzu noch ein Farbband 8 vorgesehen. Der Druckkopschlitten 7 ist auf einem Paar paralleler Führungsachsen 9 geführt, von denen eine (die gezeigte) mit einem Exzenterpaar 10 versehen ist, die gleichexzentrische Exzenter bilden. Die Exzenter des Exzenterpaares 10 sind jeweils in Druckerseitenwänden 32 drehbar gelagert. Die zweite (nicht gezeigte) Führungsachse (9) führt den Druckkopfschlitten 7 in vertikaler Richtung, jedoch nicht in horizontaler Richtung.The thickness of the existing individual or the plurality of recording media 4 is automatically determined via a scanning element 5. As shown, here the scanning member 5 consists of a scanning roller 5a and serves to control the transverse to the longitudinal direction, i.e. Printhead 2 adjustable in the transverse direction 6. The printhead 2 is fastened on a printhead carriage 7 which can be moved in the longitudinal direction. The print head carriage 7 is moved back and forth in the longitudinal direction as usual in front of the platen 3 by means of a drive (not shown), the print head 2 generating characters or images on the recording medium 4 via the printing elements 2 a. In the case of matrix dot matrix printers, an ink ribbon 8 is also provided for this. The print head carriage 7 is guided on a pair of parallel guide axes 9, one of which (the one shown) is provided with a pair of eccentrics 10, which form eccentric eccentrics. The eccentrics of the eccentric pair 10 are each rotatably mounted in the printer side walls 32. The second (not shown) guide axis (9) guides the print head carriage 7 in the vertical direction, but not in the horizontal direction.

Bei Bewegung des Abtastgliedes 5 in beiden Schwenkrichtungen entsteht nunmehr ein elektrisch erzeugtes Analogsignal, das nach Verstärkung und Umwandlung in ein Digitalsignal in einer elektronischen Schaltung 11 für die Steuerung eines am Druckerrahmen ortsfest gelagerten Schrittmotors 12 dient. Der Schrittmotor 12 bildet einen Stelltrieb 13 für das Exzenterpaar 10 der Führungsachse 9.When the scanning element 5 is moved in both pivoting directions, an electrically generated analog signal is now generated which, after amplification and conversion into a digital signal, is used in an electronic circuit 11 for the control of a stepping motor 12 which is fixedly mounted on the printer frame. The stepper motor 12 forms an actuator 13 for the eccentric pair 10 of the guide axis 9.

Der mechanische Teil der Druckkopfabstandseinstelleinrichtung, nämlich das Abtastglied 5 trägt die an dem einen Ende 14a eines Tasthebels 14 drehgelagerte Abtastrolle 5a, und an dem anderen Ende 14b ist ein Indikator 15 vorgesehen, der mit einem Sensor 16 der elektronischen Schaltung 11 für die Erzeugung des Analogsignals zusammenarbeitet. Der Tasthebel 14 ist um eine horizontale Achse 17 in einem Trägergehäuse 18 drehgelagert und wird mittels einer Zugfeder 14c gegen den oder die Aufzeichnungsträger 4 gezogen. Das Trägergehäuse 18 nimmt auch die elektronische Schaltung 11 auf. Der Sensor 16 besteht aus einem Feldplatten-Differential-Fühler, und der Indikator 15 aus einem Weicheisenteil.The mechanical part of the printhead gap adjuster, namely the scanning member 5 carries the scanning roller 5a, which is rotatably mounted on one end 14a of a scanning lever 14, and on the other end 14b an indicator 15 is provided which cooperates with a sensor 16 of the electronic circuit 11 for the generation of the analog signal. The feeler lever 14 is rotatably supported about a horizontal axis 17 in a carrier housing 18 and is pulled against the recording medium (s) 4 by means of a tension spring 14c. The carrier housing 18 also houses the electronic circuit 11. The sensor 16 consists of a field plate differential sensor, and the indicator 15 consists of a soft iron part.

Die im Trägergehäuse 18 untergebrachte elektronische Schaltung 11 ist an den Sensor 16 angeschlossen, der das Analogsignal erzeugt. Dem Sensor 16 ist ein Operationsverstärker 19, diesem ein Analog-Digital- Wandler 20, diesem ein Mikroprozessor 21 und diesem eine Treiberschaltung 22 nachgeschaltet. Das digitalisierte Signal der Treiberschaltung 22 steuert den Schrittmotor 12. Die Treiberschaltung 22 ist über entsprechende Steuerleitungen 23a und 23b an den Schrittmotor 12 angeschlossen.The electronic circuit 11 accommodated in the carrier housing 18 is connected to the sensor 16, which generates the analog signal. The sensor 16 is followed by an operational amplifier 19, an analog-digital converter 20, a microprocessor 21 and a driver circuit 22. The digitized signal of the driver circuit 22 controls the stepper motor 12. The driver circuit 22 is connected to the stepper motor 12 via corresponding control lines 23a and 23b.

Das Trägergehäuse 18 bildet gleichzeitig Teil eines Leitprofils 24, das zusammen mit einem Druckwiderlagerträger 25 einen Zuführungskanal 26 für den oder die Aufzeichnungsträger 4 bildet.The carrier housing 18 at the same time forms part of a guide profile 24 which, together with a pressure abutment carrier 25, forms a feed channel 26 for the one or more recording media 4.

Auf der Welle des Schrittmotors 12 treibt ein Motorritzel 27 über ein Zahnrad 28 eines Zwischengetriebes ein Zahnradsegment 29, das drehfest auf den Exzentern 10 der Führungsachse 9 befestigt ist. Das Zahnradsegment 29 ist bei Einschalten des Druckers und/oder des Schrittmotors 12 gegen einen Anschlag 30 in die gezeichnete Grundstellung 31 bewegbar.On the shaft of the stepper motor 12, a motor pinion 27 drives a gearwheel segment 29 via a gearwheel 28 of an intermediate gear, which gear segment 29 is fixed in a rotationally fixed manner on the eccentrics 10 of the guide axis 9. When the printer and / or the stepping motor 12 are switched on, the gear segment 29 can be moved against a stop 30 into the illustrated basic position 31.

Die in den Druckerseitenwänden 32 gelagerte Führungsachse 9 ist mittels ihres Exzenterpaares 10 verstellbar, wodurch der Abstand 1 zwischen Druckkopf 2 und Druckwiderlager 3 verstellbar wird. Bei Bewegung des Zahnradsegments 29, das mit dem Exzenter 10 drehfest verbunden ist, verstellt sich die Führungsachse 9 und damit der Druckkopfschlitten 7 und somit der Druckkopf 2, so daß sich der Abstand 1 ändert. Es ist nicht notwendig, beide Exzenter 10 mit einem Zahnradsegment 29 auszustatten.The guide axis 9 mounted in the printer side walls 32 is adjustable by means of its pair of eccentrics 10, as a result of which the distance 1 between the print head 2 and the pressure abutment 3 is adjustable. When the gear segment 29, which is connected to the eccentric 10 in a rotationally fixed manner, moves the guide axis 9 and thus the print head carriage 7 and thus the print head 2, so that the distance 1 changes. It is not necessary to equip both eccentrics 10 with a gear segment 29.

Claims (6)

  1. A printer, in particular a wire matrix printer, with a print head gap-setting means for setting the distance (1) between the print head (2) and the print counter-surface (3) for record carriers (4) of unequal thickness which lie against the print counter-surface (3) or for a changing number of record carriers (4), with a mechanical detecting member (5) which lies on the record carrier or carriers (4) and which serves to control the print head (2) which is adjustable transversely to the longitudinal direction and which is arranged on a longitudinally movable print head carriage (7), and with a print head carriage (7) which is guided on a pair of parallel guide spindles (9) of which one guide spindle (9) is mounted by means of a pair of eccentrics (10) and the other is mounted to be transversely movable in printer side walls (32), with a stepping motor (12) which is mounted in stationary manner on the printer frame forming a setting drive (13) for the pair of eccentrics (10) of the guide spindle (9), characterised in that
    an electrical analog signal which can be generated by the adjustment movements of the detecting member (5) in the converted form of an electronic digital signal in an electronic circuit (11) serves for controlling the stepping motor (12), and that the detecting member (5) consists of a detecting roller (5a) which is acted upon by a spring force and is mounted to rotate on one end (14a) of a detecting lever (14), and that an indicator (15) is provided at the other end (14b), which indicator cooperates with a sensor (16) of the electronic circuit (11) for generating the analog signal.
  2. A printer according to Claim 1, characterised in that the electronic circuit (11) for the analog signal consists of an operational amplifier (19) succeeding the sensor (16), an analog-to-digital converter (20), a microprocessor (21) and a driver circuit (22), by means of which the stepping motor (12) can be controlled.
  3. A printer according to Claims 1 and 2, characterised in that the detecting lever (14) and the sensor (16) are located on a carrier housing (18) in which the electronic circuit (11) is also located.
  4. A printer according to Claims 1 to 3, characterised in that the carrier housing (18) for the detecting roller (5a) provides a portion of a guide profile (24) which together with a print counter-surface carrier (25) forms a feed channel (26) for the record carrier (4).
  5. A printer according to Claims 1 to 4, characterised in that a motor pinion (27) of the stepping motor (12) is in a drive connection with a gear wheel segment (29) via gear wheels (28) of an intermediate gear, which segment is attached to the eccentrics (10) of the guide spindle (9) so as to be resistant to rotation.
  6. A printer according to Claim 5, characterised in that the gear wheel segment (29) upon the switching-on of the stepping motor (12) can be moved against a stop (30) into a basic position (31).
EP89730187A 1988-09-08 1989-08-16 Print head gap adjusting device for a printer, in particular for a matrix needle printer Revoked EP0360728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89730187T ATE92402T1 (en) 1988-09-08 1989-08-16 PRINTERS, IN PARTICULAR DOTS-MATRIX PRINTERS, WITH PRINT HEAD DISTANCE ADJUSTMENT DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830880 1988-09-08
DE3830880A DE3830880A1 (en) 1988-09-08 1988-09-08 PRINTER, IN PARTICULAR MATRIX NEEDLE PRINTER, WITH A PRINT HEAD SPACER ADJUSTMENT DEVICE

Publications (2)

Publication Number Publication Date
EP0360728A1 EP0360728A1 (en) 1990-03-28
EP0360728B1 true EP0360728B1 (en) 1993-08-04

Family

ID=6362729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89730187A Revoked EP0360728B1 (en) 1988-09-08 1989-08-16 Print head gap adjusting device for a printer, in particular for a matrix needle printer

Country Status (5)

Country Link
US (1) US5193918A (en)
EP (1) EP0360728B1 (en)
JP (1) JPH0381174A (en)
AT (1) ATE92402T1 (en)
DE (2) DE3830880A1 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2239841B (en) * 1989-12-29 1994-08-17 Canon Kk Ink jet recording apparatus
DE4023411A1 (en) * 1990-07-23 1992-02-06 Siemens Nixdorf Inf Syst Automatic head position adjuster for dot-matrix printer - uses contact sensor to measure paper thickness before paper reaches printing position
DE4025483C2 (en) * 1990-08-10 1995-03-16 Siemens Nixdorf Inf Syst Printing device
KR930005467B1 (en) * 1990-12-07 1993-06-22 주식회사 금성사 Gap maintaining device between scanner and film for color video printer
DE4041985A1 (en) * 1990-12-21 1992-07-02 Mannesmann Ag PRINTER, IN PARTICULAR MATRIX PRINTER
JPH0679885A (en) * 1992-06-24 1994-03-22 Sony Corp Printing method, printer, printing head, printed article container and printing method of cassette
DE4221265C2 (en) * 1992-06-26 1996-01-11 Mannesmann Ag Printer with a printhead gap adjuster
DE4225933C2 (en) * 1992-08-03 1997-04-30 Mannesmann Ag Parallel setting device for a print head carriage guide to a print abutment in printers, in particular in matrix printers
JP2665150B2 (en) * 1994-05-25 1997-10-22 新潟日本電気株式会社 Serial printer with paper thickness detection mechanism
WO1996012621A1 (en) * 1994-10-20 1996-05-02 Omron Corporation Printing device and postage franking machine
DE69425975T2 (en) * 1994-11-25 2001-01-25 Hewlett Packard Co Device for adjusting the space between the print head and the print media
US5486063A (en) * 1995-01-09 1996-01-23 Intermec Incorporated Method and apparatus for sensing the length of label or tag media by detecting changes in relative thickness
JPH08187878A (en) * 1995-01-09 1996-07-23 Brother Ind Ltd Ink jet print recording device
US5489160A (en) * 1995-02-28 1996-02-06 Hewlett-Packard Company Print medium support mechanism for ink-jet printers
JP3655345B2 (en) * 1995-04-12 2005-06-02 シチズン時計株式会社 Gap adjustment device for impact dot printer
US6102509A (en) * 1996-05-30 2000-08-15 Hewlett-Packard Company Adaptive method for handling inkjet printing media
KR100186611B1 (en) * 1996-06-26 1999-05-15 김광호 Paper thickness sensing device of image recording apparatus and recording head auto-controlling apparatus of inkjet recording apparatus and method thereof
CN1083776C (en) * 1996-07-26 2002-05-01 西铁城钟表株式会社 Drive mechanism for stepping motor in printer
US5746521A (en) * 1996-12-20 1998-05-05 Intermec Corporation Thermal printhead with integrated printhead position sensor
DE29701808U1 (en) * 1997-02-03 1997-12-11 Psi Printer Systems Internatio Ribbon cassette for writing instruments, especially for matrix printers
US5978004A (en) * 1997-03-31 1999-11-02 Zebra Technologies Corporation Label printer with label edge sensor
DE19813899A1 (en) * 1998-03-28 1999-09-30 Psi Printer Systems Internatio Printers, especially dot matrix printers
JP3401205B2 (en) 1999-01-14 2003-04-28 シャープ株式会社 Serial printer
US6464414B1 (en) 2000-03-21 2002-10-15 Lexmark International, Inc. Print media sensor adjustment mechanism
JP2002001928A (en) * 2000-06-21 2002-01-08 Canon Inc Recorder
US6755518B2 (en) * 2001-08-30 2004-06-29 L&P Property Management Company Method and apparatus for ink jet printing on rigid panels
US6523921B2 (en) * 2000-08-30 2003-02-25 L&P Property Management Method and apparatus for printing on rigid panels and other contoured or textured surfaces
KR20030017898A (en) * 2001-08-25 2003-03-04 이색용 A bolt construction and combination method for moter cover
US6616354B2 (en) * 2001-10-30 2003-09-09 Hewlett-Packard Development Company, Lp. Method and apparatus for adjusting printhead to print-media travel path spacing in a printer
US6736557B2 (en) 2002-09-05 2004-05-18 Lexmark International, Inc. Printhead gap adjustment mechanism for an imaging apparatus
US20060128578A9 (en) * 2002-09-20 2006-06-15 Nathalie Jager Lezer Cosmetic composition comprising rigid fibres and at least one compound chosen from film-forming polymers and waxes
FR2859129B1 (en) * 2003-08-28 2005-11-11 Sydel SYSTEM FOR CONTINUOUSLY ADJUSTING THE DISTANCE BETWEEN A MARKING HEAD AND A MOBILE OBJECT AND MARKING DEVICE COMPRISING SUCH A SYSTEM
CN1938209A (en) * 2004-01-30 2007-03-28 Zih公司 Self calibrating media edge sensor
JP4818645B2 (en) * 2005-05-31 2011-11-16 日本ケーブル株式会社 Wind monitoring device for cable carriage
FR2939033B1 (en) 2008-12-02 2012-08-31 Oreal COSMETIC COMPOSITION FOR MAKE-UP AND / OR CARE OF KERATINIC MATERIALS, AND METHOD FOR MAKE-UP
US8162428B2 (en) * 2009-09-17 2012-04-24 Xerox Corporation System and method for compensating runout errors in a moving web printing system
US9237992B2 (en) 2009-10-27 2016-01-19 The Procter & Gamble Company Two-step mascara product
US9216145B2 (en) 2009-10-27 2015-12-22 The Procter & Gamble Company Semi-permanent cosmetic concealer
US10034829B2 (en) 2010-10-27 2018-07-31 Noxell Corporation Semi-permanent mascara compositions
US9004791B2 (en) 2010-04-30 2015-04-14 The Procter & Gamble Company Package for multiple personal care compositions
US8491081B2 (en) 2011-03-21 2013-07-23 Xerox Corporation System and method for compensating for roll eccentricity in a printer
US9173824B2 (en) 2011-05-17 2015-11-03 The Procter & Gamble Company Mascara and applicator
CN104245048B (en) 2012-04-26 2017-09-08 诺赛尔股份有限公司 Two step mascara products
WO2013173452A2 (en) 2012-05-15 2013-11-21 The Procter & Gamble Company Method for quantitatively determining eyelash clumping
CN107053873B (en) * 2013-10-30 2019-01-29 精工爱普生株式会社 The print head moving method of line printer and line printer

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608301C2 (en) * 1976-02-28 1986-02-20 Ncr Corp., Dayton, Ohio Device for regulating the distance between a print head and a recording medium
DE2752061C3 (en) * 1977-11-22 1981-02-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Device for adjusting the distance of a print head perpendicular to the platen
JPS5739978A (en) * 1980-08-25 1982-03-05 Toshiba Corp Printer
JPS5796868A (en) * 1980-12-08 1982-06-16 Fujitsu Ltd Dot printer
DE3112079C2 (en) * 1981-03-27 1983-02-03 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Device for lifting the printhead from the platen
DE3239927A1 (en) * 1982-10-28 1984-05-03 Porsche Ag DEVICE FOR CONTROLLING A FOLLOW-UP ACTUATION FOR A DOUBLE CLUTCH
JPS60212373A (en) * 1984-04-09 1985-10-24 Nec Corp Automatic paper thickness adjusting mechanism for printer
US4676675A (en) * 1984-05-09 1987-06-30 Brother Kogyo Kabushiki Kaisha Media thickness compensating device for a printer
JPH068062B2 (en) * 1984-05-15 1994-02-02 ブラザー工業株式会社 Paper thickness detector for printing device
JPS61171377A (en) * 1985-01-25 1986-08-02 Nec Corp Automatic paper thickness detecting mechanism for printer
JPS6273978A (en) * 1985-09-26 1987-04-04 Brother Ind Ltd Printing apparatus
JPS6274676A (en) * 1985-09-30 1987-04-06 Tokyo Electric Co Ltd Printer
JPH0698769B2 (en) * 1985-11-15 1994-12-07 キヤノン株式会社 Recording device
JPS62119077A (en) * 1985-11-19 1987-05-30 Ricoh Co Ltd Mechanism for adjusting gap of printing head of printer
CN1013840B (en) * 1988-01-28 1991-09-11 精工爱普生株式会社 Mechanism of automatically adjusting platen gap in printers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, Field M, Band 10, Nr. 109, 23.04.1986; JP A 60 240 483. *

Also Published As

Publication number Publication date
ATE92402T1 (en) 1993-08-15
JPH0381174A (en) 1991-04-05
DE58905131D1 (en) 1993-09-09
US5193918A (en) 1993-03-16
EP0360728A1 (en) 1990-03-28
DE3830880A1 (en) 1990-03-15

Similar Documents

Publication Publication Date Title
EP0360728B1 (en) Print head gap adjusting device for a printer, in particular for a matrix needle printer
CH662784A5 (en) RIBBON CASSETTE FOR AN ELECTRONIC TYPEWRITER AND WRITING DEVICE FOR SUCH A CASSETTE.
DE4041985C2 (en)
EP0059923B1 (en) Mechanism for a mechanical, in particular an electro-mechanical printer for positioning an ink ribbon on different tracks
EP0038456B1 (en) Method for the production of letters partially covering one another on a record carrier for writing or similar office machines
DE2906135C2 (en) Printing unit for the production of a typeface with even character spacing
EP0542811B1 (en) Printing device with adjustable printing head
DE3314041A1 (en) Hand-held dot matrix printer
DE2831488A1 (en) CORRECTION DEVICE FOR ELECTRONICALLY CONTROLLED TYPEWRITERS
DE3437818C2 (en) Dot matrix printer
DE2838627A1 (en) PRINTER WITH HORIZONTALLY MOVABLE PRINT HEAD
EP0019080B1 (en) Device for printing documents
DE3233425C2 (en)
DE3606228A1 (en) COLOR POINT RECORDER
DE2652219A1 (en) SERIAL PRINTER
DE2521027A1 (en) Printing machine with continually rotating symbol wheel - has symbols located at ends of radially extending arms struck by printing hammers
DE2823153C2 (en) Printing device with a movable print head
DE2931326C2 (en) Drive device for the color and correction tape in a typewriter or similar office machine
DE4221265C2 (en) Printer with a printhead gap adjuster
DE2928079A1 (en) Typewriter with daisy wheel head and erase facility - has motor controlled carriage, with position control from microprocessor unit, which is positioned in series of incremental movements
DE2708098C3 (en) Recorder
DE2901611A1 (en) Typewriter colour tape cassette changeover unit - uses lifting element and permanent magnet positioning devices and return spring for line alignment
DE110526C (en)
DE3834161A1 (en) Drive device for an ink ribbon in a typewriter or office machine of similar design
DE2124889C (en) Printing unit for typewriters, calculators or similar office machines

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19900327

17Q First examination report despatched

Effective date: 19911223

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19930804

Ref country code: NL

Effective date: 19930804

Ref country code: GB

Effective date: 19930804

Ref country code: FR

Effective date: 19930804

Ref country code: BE

Effective date: 19930804

REF Corresponds to:

Ref document number: 92402

Country of ref document: AT

Date of ref document: 19930815

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19930816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930831

REF Corresponds to:

Ref document number: 58905131

Country of ref document: DE

Date of ref document: 19930909

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19930804

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940503

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SIEMENS NIXDORF INFORMATIONSSYSTEME AKTIENGESELLSC

Effective date: 19940503

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19940813