EP0991521B1 - Ink jet printer with a nozzle covering and cleaning device - Google Patents

Ink jet printer with a nozzle covering and cleaning device Download PDF

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Publication number
EP0991521B1
EP0991521B1 EP98919075A EP98919075A EP0991521B1 EP 0991521 B1 EP0991521 B1 EP 0991521B1 EP 98919075 A EP98919075 A EP 98919075A EP 98919075 A EP98919075 A EP 98919075A EP 0991521 B1 EP0991521 B1 EP 0991521B1
Authority
EP
European Patent Office
Prior art keywords
ink jet
disc
jet printer
printer according
cleaning device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98919075A
Other languages
German (de)
French (fr)
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EP0991521A1 (en
Inventor
Guenter Baitz
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.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wincor Nixdorf GmbH and Co KG filed Critical Wincor Nixdorf GmbH and Co KG
Publication of EP0991521A1 publication Critical patent/EP0991521A1/en
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Publication of EP0991521B1 publication Critical patent/EP0991521B1/en
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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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16505—Caps, spittoons or covers for cleaning or preventing drying out
    • B41J2/16508—Caps, spittoons or covers for cleaning or preventing drying out connected with the printer frame
    • B41J2/16511—Constructions for cap positioning

Definitions

  • the invention relates to an inkjet printer with a Cover and cleaning device for the ink nozzles an inkjet print head according to the preamble of Claim 1.
  • An inkjet printer with a cover and cleaning facility for the ink nozzles of an ink print head is known from DE-C-36 11 666.
  • that of the Record carrier maximum ingestible and from the ink print head maximum printable area is a parking area with a cover device and a cleaning device arranged for the ink nozzles of the ink print head.
  • the parking area gives the printer a width that not accepted in some applications can. This is especially true for POS printers of the type for example in the international patent application WO-A-9 840 219.
  • Such cash register printers will be often built into a cutout in a checkout counter, so that there is a quasi standard for their base area has formed with a width that is little larger than the width of the largest to be printed on Document.
  • This has A4 format, so one Width of 210 mm. This is the case with printers in this class The ink printing principle has therefore not yet been used.
  • the object of the invention is therefore for an inkjet printer with one in the print area of the ink print head arranged covering and cleaning device for the ink nozzles of the ink print head provide support to propose for a record carrier that at Place the cover and cleaning device in the Pressure range can be brought.
  • the cover device and the cleaning device are arranged in the print area of the ink print head.
  • the cover device, the cleaning device and the support section for the recording medium on the circumference of a circular or circular segment-shaped disc are arranged around a through the center of the circle extending axis is rotatable, no additional Space for a parking area outside the printing area or in front of and behind the ink printhead.
  • the Disc can be anywhere within the pressure range Print line to be arranged.
  • the axis can be parallel to the platen as well also perpendicular to this and parallel to the plane of the record carrier be aligned.
  • the disc is preferably driven by a motor, in particular rotated a stepper motor. In the latter case it can the angular position of the disc simply by counting the Motor step impulses are recorded.
  • the drive of the Disk preferably takes place via a toothing on at least a part of its scope, which with a through the Motor driven gear meshes.
  • the Slidable along the platen thereby can be used with a POS printer with a receipt printing station, as he from the German patent application 197 09 941.6 is known, the disc in the part of Print area that is not shifted from the receipt paper strip is occupied. If a receipt is placed side by side and used a journal printing station, the disc can in the gap between the receipt and journal paper strips to be brought.
  • the covering device In order for the cover device to be lifted off normal to the surface the nozzle plate of the ink printhead, is the covering device with the disc over a radial adjustable slider connected, and on the slider is a control pin attached in one in the inkjet printer arranged, the axis helical surrounding control curve is guided.
  • the control curve is on one held on the axis, opposite the disc stationary control plate, i.e. not with the disc rotating educated.
  • Fig. 1 is a first embodiment of an ink jet printer 10 in a schematic perspective Front view shown in which all not relevant to the invention Printer parts are omitted.
  • From the side of the side wall that faces the inside of the printer 12 is a bar-shaped platen 14 normal to the surface from. This is due to a gap 16 in the middle area of the inkjet printer divided into two parts 14 ', 14 ".
  • the platen 14 is on a paper guide surface 38 (FIG. 2).
  • an ink print head 18 Along the platen 14 and parallel to this is an ink print head 18 below Formation of a print line in the direction of a double arrow A slidably mounted.
  • the gap 16 there is a cylindrical disk 20 ⁇ m an axis 22 which coincides with the cylinder axis, rotatably mounted.
  • the axis 22 runs parallel to the Platen 14 on its side facing away from the ink print head 18 Page.
  • a covering device 24, a cleaning device 26 and a support section 28 are on the circumference of the disc 20, respectively offset with respect to one another.
  • the covering device 24 has the shape of a open towards the nozzle plate of the ink print head 18 Cap and consists of an elastically deformable ink-resistant plastic or rubber.
  • the cleaning facility 26 has the shape of a radially from the peripheral surface the disk 20 protruding axially aligned Plate. It is also made of an elastically deformable ink-resistant plastic or rubber formed.
  • the support section 28 is a section enlarged Disc diameter. It extends over the entire Width of the disc 20. Is the latter rotated so that the Support section 28 faces the ink print head 18, the surface of the support section 28 has the
  • the disc 20 is in the direction of a within the gap 16 Double arrow B between positions 20 '(with solid lines) and 20 "(dashed drawn) movable.
  • position 20 " is the Disc 20 shown in an angular position in which the cover device 24 faces the ink print head 18 is.
  • the cap-like shape is in this angular position the cover device 24 can be seen.
  • the setting of the Disc 20 when printing a gap 16 overlapping Document 34 is described below.
  • Fig. 2 shows a schematic side view of the in Fig. 1 illustrated inkjet printer 10.
  • the disc 20 is mounted on a coaxial shaft 36. Further is they in their peripheral area facing away from the paper guide surface 38 provided with a toothing 40 which with a gear 44 which can be driven by a stepper motor 42 combs.
  • the cover 24 is radial at one end arranged to the disc 20 adjustable slide 46, which is rotatable together with the disc 20.
  • To the Slider 46 is aligned parallel to the shaft 36
  • Control pin 48 attached in a helical shape the cam 22 surrounding the axis 22 is guided. This, in turn, is held on a shaft 22 fixed to the disc 20, so not with this co-rotating control plate 52 formed.
  • the slider 46 is in the region of the shaft 36 with an elongated hole 54 provided with which it is longitudinally displaceable on the shaft 36 is stored.
  • the control pin 48 runs along the cam 50.
  • the slide 46 is radial in the direction of the axis 22 moved so that the cover 24 of the Nozzle plate of the ink print head 18 lifted off and after is swung away in front of this.
  • the disk 20 enters the cleaning device 26 the area of the ink print head 18. It becomes elastic deflected so that their leading, parallel to the axis 22 aligned edge 56 the nozzle plate of the Ink printhead 18 sweeps over and on this removes any adhering contaminants.
  • By multiple Turning the disk 20 back and forth can have the cleaning effect still be increased.
  • the disk 20 is used for printing rotated further until the support section 28 reaches the pressure area 18 faces. Now the latter can be in the print line direction can be moved across the entire printing area.
  • the disc 20 starting from the in Fig. 2nd shown position, in which the printing area 18 covered is controlled as follows: The leading edge of a the inkjet printer 10 in the direction of arrow C fed document 34 is from one in front of the platen 14 arranged first light barrier 58 recognized, whereupon a document transport device, not shown is stopped. Then the disc 20 is like described above until the support portion 28 the Ink printhead 18 faces. The gap 16 is thereby largely closed, so that the document 34 also in this area is supported. Reaching this Position is based on the number of the stepper motor 42nd fed impulses determined and thus the document transport device Approved.
  • the document 34 After printing on the Document 34 is either in or against the direction arrow C transported from the ink jet printer 10.
  • the document 34 has the inkjet printer 10 with Leave safety if neither the first photoelectric sensor 58 another one arranged above the platen 14 second light barrier 60 the presence of a document reports.
  • the disc 20 is then turned clockwise into the Turned back position in which the cover 24th the nozzle plate of the ink printhead 18 covers what again based on the number of the stepper motor 42 fed Impulses is determined.
  • Fig. 3 shows a second embodiment of an ink jet printer 100 in a schematic top view. This differs from that in FIGS. 1 and 2 illustrated inkjet printer 10 in that the Axis 122 and thus the shaft 136 of the disk 120 perpendicular to the platen 114 ', 114 "and parallel to Level of a recording medium 134 is aligned.
  • the disk 120 is shown in its ready-to-print position, otherwise the arrangement is the same as that shown in FIG. 2 identical. The same positions are therefore with marked with the same reference numerals.

Landscapes

  • Ink Jet (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Description

Die Erfindung betrifft einen Tintenstrahldrucker mit einer Abdeckungs- und Reinigungseinrichtung für die Tintendüsen eines Tintendruckkopfes nach dem Oberbegriff des Anspruchs 1.The invention relates to an inkjet printer with a Cover and cleaning device for the ink nozzles an inkjet print head according to the preamble of Claim 1.

Ein Tintenstrahldrucker mit einer Abdeckungs- und Reinigungseinrichtung für die Tintendüsen eines Tintendruckkopfes ist aus der DE-C-36 11 666 bekannt. Darin ist ein parallel zu einer Druckzeile verschieblicher Tintendruckkopf und ein der Abstützung eines Aufzeichnungsträgers gegenüber dem Tintendruckkopf dienendes, parallel zur Druckzeile ausgerichtetes walzenförmiges Druckgegenlager beschrieben. Neben dem Druckbereich, also dem von dem Aufzeichnungsträger maximal einnehmbaren und von dem Tintendruckkopf maximal bedruckbaren Bereich, ist ein Parkbereich mit einer Abdeckeinrichtung und einer Reinigungseinrichtung für die Tintendüsen des Tintendruckkopfes angeordnet.An inkjet printer with a cover and cleaning facility for the ink nozzles of an ink print head is known from DE-C-36 11 666. There is one in it Ink printhead that can be moved parallel to a print line and a support of a record carrier opposite to the ink print head, parallel to Print line aligned roller-shaped platen described. In addition to the print area, that of the Record carrier maximum ingestible and from the ink print head maximum printable area is a parking area with a cover device and a cleaning device arranged for the ink nozzles of the ink print head.

Durch den Parkbereich erhält der Drucker eine Breite, die bei manchen Anwendungsfällen nicht hingenommen werden kann. Dies gilt besonders für Kassendrucker der Art, wie sie beispielsweise in der internationalen Patentanmeldung WO-A-9 840 219 beschrieben ist. Solche Kassendrucker werden häufig in einen Ausschnitt in einem Kassentisch eingebaut, so daß sich für deren Grundfläche ein Quasistandard herausgebildet hat mit einem Breitenmaß, das nur wenig größer als die Breite des größten mit dem Drucker zu bedruckenden Belegs ist. Dieser hat DIN A4-Format, also eine Breite von 210 mm. Bei Druckern dieser Klasse ist das Tintendruckprinzip deshalb bisher nicht angewendet worden. The parking area gives the printer a width that not accepted in some applications can. This is especially true for POS printers of the type for example in the international patent application WO-A-9 840 219. Such cash register printers will be often built into a cutout in a checkout counter, so that there is a quasi standard for their base area has formed with a width that is little larger than the width of the largest to be printed on Document. This has A4 format, so one Width of 210 mm. This is the case with printers in this class The ink printing principle has therefore not yet been used.

In der US-A-5 051 761 ist bereits vorgeschlagen worden, die Abdeckeinrichtung und die Reinigungseinrichtung am Umfang einer im Druckbereich des Tintendruckkopfes angeordneten kreis- oder kreissegmentförmigen Scheibe anzubringen, die um eine durch den Kreismittelpunkt verlaufende Achse drehbar ist. Der Aufzeichnungsträger wird dabei im Druckbereich von einem endlosen Transportband abgestützt, das zwischen zwei Umlenkrollen ausgespannt ist. Die eine dieser Transportrollen ist dabei -in Transportrichtung des Aufzeichnungsträgers gesehen- vor dem Druckbereich und die andere hinter diesem angeordnet. Aus dem Transportband ist ein Fenster ausgeschnitten, durch welches hindurch die Abdeckeinrichtung bzw. die Reinigungseinrichtung an dem Tintendruckkopf angreifen, wenn die Scheibe in Richtung des Druckbereiches angehoben wird. Die Anordnung aus Transportband und Umlenkrollen ist aufwendig und benötigt relativ viel Platz. Hinzu kommt, daß das Transportband zunächst in eine bestimmte Umfangsstellung relativ zu dem Tintendruckkopf gebracht werden muß, bevor die Abdeckeinrichtung oder die Reinigungseinrichtung an dem Tintendruckkopf angreifen kann. Dies erfordert zusätzliche Überwachungseinrichtungen und Steuerungsmaßnahmen für die Positionierung des Transportbandes und macht den Drucker langsamer, da der Aufzeichnungsträger erst das Transportband verlassen haben muß, bevor das Fenster in den Bereich des Tintendruckkopfes gebracht werden kann.It has already been proposed in US Pat. No. 5,051,761 that the cover device and the cleaning device on Extent of one arranged in the print area of the ink print head to attach a circular or circular segment disc, the one running through the center of the circle Axis is rotatable. The record carrier becomes supported by an endless conveyor belt in the printing area, that is stretched between two pulleys. One of these transport rollers is in the transport direction of the record carrier seen - before Printing area and the other arranged behind this. Out a window is cut out of the conveyor belt which through the cover device or the cleaning device attack the ink printhead if the disc is raised in the direction of the pressure area becomes. The arrangement of the conveyor belt and deflection rollers is complex and requires a relatively large amount of space. in addition comes that the conveyor belt first into a certain Brought circumferential position relative to the ink print head must be before the cover device or the cleaning device can attack the ink printhead. This requires additional monitoring equipment and Control measures for the positioning of the conveyor belt and slows down the printer because of the record carrier must have left the conveyor belt first, before the window in the area of the ink printhead can be brought.

Aufgabe der Erfindung ist es daher, für einen Tintenstrahldrucker mit einer im Druckbereich des Tintendruckkopfes angeordneten Abdeck- und Reinigungseinrichtung für die Tintendüsen des Tintendruckkopfes eine Stützeinrichtung für einen Aufzeichnungsträger vorzuschlagen, die an Stelle der Abdeck- und Reinigungseinrichtung in den Druckbereich gebracht werden kann. The object of the invention is therefore for an inkjet printer with one in the print area of the ink print head arranged covering and cleaning device for the ink nozzles of the ink print head provide support to propose for a record carrier that at Place the cover and cleaning device in the Pressure range can be brought.

Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.The object is solved by the features of claim 1.

Die Abdeckeinrichtung und die Reinigungseinrichtung sind im Druckbereich des Tintendruckkopfes angeordnet. Dadurch, daß die Abdeckeinrichtung, die Reinigungseinrichtung und der Stützabschnitt für den Aufzeichnungsträger am Umfang einer kreis- oder kreissegmentförmigen Scheibe angeordnet sind, die um eine durch den Kreismittelpunkt verlaufende Achse drehbar ist, wird kein zusätzlicher Platz für einen Parkbereich außerhalb des Druckbereichs oder vor und hinter dem Tintendruckkopf benötigt. Die Scheibe kann im Druckbereich irgendwo innerhalb der Druckzeile angeordnet sein. Durch die Drehung der Scheibe um ihre Achse kann die Abdeckeinrichtung vor die Düsenplatte des Tintendruckkopfes gebracht, die Reinigungseinrichtung an der Düsenplatte vorbeibewegt oder der Stützabschnitt in den Druckbereich geschwenkt werden. Da vor einem Druckvorgang die Abdeckeinrichtung ohnehin vor der Düsenplatte weggeschwenkt werden muß, kann der Stützabschnitt durch einfaches Weiterdrehen der Scheibe ohne zusätzlichen Aufwand in den Druckbereich gebracht werden.The cover device and the cleaning device are arranged in the print area of the ink print head. Thereby, that the cover device, the cleaning device and the support section for the recording medium on the circumference of a circular or circular segment-shaped disc are arranged around a through the center of the circle extending axis is rotatable, no additional Space for a parking area outside the printing area or in front of and behind the ink printhead. The Disc can be anywhere within the pressure range Print line to be arranged. By rotating the disc the covering device can rotate about its axis in front of the nozzle plate of the ink print head, the cleaning device moved past the nozzle plate or the support section be pivoted into the printing area. Before a printing process the cover device anyway before The nozzle section can be pivoted away, the support section by simply turning the disc further without additional Effort in the printing area.

Die Achse kann sowohl parallel zum Druckgegenlager als auch senkrecht zu diesem und parallel zur Ebene des Aufzeichnungsträgers ausgerichtet sein.The axis can be parallel to the platen as well also perpendicular to this and parallel to the plane of the record carrier be aligned.

Vorzugsweise wird die Scheibe durch einen Motor, insbesondere einen Schrittmotor gedreht. In letztem Fall kann die Winkelposition der Scheibe einfach durch Zählen der Motorschrittimpulse festgehalten werden. Der Antrieb der Scheibe erfolgt bevorzugt über eine Verzahnung an zumindest einem Teil ihres Umfangs, die mit einem durch den Motor angetriebenen Zahnrad kämmt.The disc is preferably driven by a motor, in particular rotated a stepper motor. In the latter case it can the angular position of the disc simply by counting the Motor step impulses are recorded. The drive of the Disk preferably takes place via a toothing on at least a part of its scope, which with a through the Motor driven gear meshes.

In einer bevorzugten Weiterbildung der Erfindung ist die Scheibe entlang dem Druckgegenlager verschieblich. Dadurch kann bei einem Kassendrucker mit einer Bon-Druckstation, wie er aus der deutschen Patentanmeldung 197 09 941.6 bekannt ist, die Scheibe in den Teil des Druckbereichs verschoben werden, der nicht von dem Bon-Papierstreifen belegt ist. Wird nebeneinander eine Bon- und eine Journal-Druckstation verwendet, kann die Scheibe in die Lücke zwischen dem Bon- und dem Journal-Papierstreifen gebracht werden.In a preferred development of the invention, the Slidable along the platen. Thereby can be used with a POS printer with a receipt printing station, as he from the German patent application 197 09 941.6 is known, the disc in the part of Print area that is not shifted from the receipt paper strip is occupied. If a receipt is placed side by side and used a journal printing station, the disc can in the gap between the receipt and journal paper strips to be brought.

Um ein flächennormales Abheben der Abdeckeinrichtung von der Düsenplatte des Tintendruckkopfes sicherzustellen, ist die Abdeckeinrichtung mit der Scheibe über einen radial verstellbaren Schieber verbunden, und an dem Schieber ist ein Steuerzapfen befestigt, der in einer im Tintenstrahldrucker angeordneten, die Achse schneckenförmig umgebenden Steuerkurve geführt ist. Die Steuerkurve ist an einer an der Achse gehaltenen, gegenüber der Scheibe ortsfesten, also nicht mit der Scheibe mitdrehenden Steuerplatte ausgebildet.In order for the cover device to be lifted off normal to the surface the nozzle plate of the ink printhead, is the covering device with the disc over a radial adjustable slider connected, and on the slider is a control pin attached in one in the inkjet printer arranged, the axis helical surrounding control curve is guided. The control curve is on one held on the axis, opposite the disc stationary control plate, i.e. not with the disc rotating educated.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung, welche in Verbindung mit den beigefügten Zeichnungen die Erfindung an Hand von Ausführungsbeispielen erläutern. Es zeigt:

Fig. 1
ein erstes Ausführungsbeispiel eines Tintenstrahldruckers in einer schematischen perspektivischen Vorderansicht,
Fig. 2
eine schematisierte Seitenansicht des in Fig. 1 dargestellten Tintenstrahldruckers,
Fig. 3
ein zweites Ausführungsbeispiel eines Tintenstrahldruckers in einer schematischen Draufsicht.
Further features and advantages of the invention will become apparent from the following description, which in connection with the accompanying drawings explain the invention using exemplary embodiments. It shows:
Fig. 1
a first embodiment of an inkjet printer in a schematic perspective front view,
Fig. 2
2 shows a schematic side view of the inkjet printer shown in FIG. 1,
Fig. 3
a second embodiment of an inkjet printer in a schematic plan view.

In Fig. 1 ist ein erstes Ausführungsbeispiel eines Tintenstrahldruckers 10 in einer schematischen perspektivischen Vorderansicht dargestellt, in der alle nicht erfindungsrelevanten Druckerteile fortgelassen sind. Darin ist eine Seitenwand eines Druckergestells mit 12 bezeichnet. Von der zum Druckerinneren weisenden Seite der Seitenwand 12 steht ein balkenförmiges Druckgegenlager 14 flächennormal ab. Dieses ist durch eine Lücke 16 im Mittelbereich des Tintenstrahldruckers in zwei Teile 14', 14" geteilt. Das Druckgegenlager 14 ist an einer Papierleitfläche 38 (Fig. 2) ausgebildet. Entlang dem Druckgegenlager 14 und parallel zu diesem ist ein Tintendruckkopf 18 unter Bildung einer Druckzeile in Richtung eines Doppelpfeils A verschieblich gelagert.In Fig. 1 is a first embodiment of an ink jet printer 10 in a schematic perspective Front view shown in which all not relevant to the invention Printer parts are omitted. In it a side wall of a printer frame designated 12. From the side of the side wall that faces the inside of the printer 12 is a bar-shaped platen 14 normal to the surface from. This is due to a gap 16 in the middle area of the inkjet printer divided into two parts 14 ', 14 ". The platen 14 is on a paper guide surface 38 (FIG. 2). Along the platen 14 and parallel to this is an ink print head 18 below Formation of a print line in the direction of a double arrow A slidably mounted.

In der Lücke 16 ist eine zylinderförmige Scheibe 20 um eine Achse 22, die mit der Zylinderachse zusammenfällt, drehbar gelagert. Die Achse 22 verläuft parallel zu dem Druckgegenlager 14 auf dessen dem Tintendruckkopf 18 abgewandten Seite. Am Umfang der Scheibe 20 sind, jeweils gegeneinander winkelversetzt, eine Abdeckeinrichtung 24, eine Reinigungseinrichtung 26 und ein Stützabschnitt 28 angeordnet. Die Abdeckeinrichtung 24 hat die Form einer gegenüber der Düsenplatte des Tintendruckkopfes 18 offenen Kappe und besteht aus einem elastisch verformbaren tintenresistenten Kunststoff oder Gummi. Die Reinigungseinrichtung 26 hat die Gestalt einer radial von der Umfangsfläche der Scheibe 20 abstehenden axial ausgerichteten Platte. Sie ist ebenfalls aus einem elastisch verformbaren tintenresistenten Kunststoff oder Gummi gebildet. Der Stützabschnitt 28 ist ein Abschnitt vergrößerten Scheibendurchmessers. Er erstreckt sich über die gesamte Breite der Scheibe 20. Ist letztere so gedreht, daß der Stützabschnitt 28 dem Tintendruckkopf 18 gegenübersteht, ist die Oberfläche des Stützabschnitts 28 flächengleich mit dem Druckgegenlager 14.In the gap 16 there is a cylindrical disk 20 µm an axis 22 which coincides with the cylinder axis, rotatably mounted. The axis 22 runs parallel to the Platen 14 on its side facing away from the ink print head 18 Page. Are on the circumference of the disc 20, respectively offset with respect to one another, a covering device 24, a cleaning device 26 and a support section 28 arranged. The covering device 24 has the shape of a open towards the nozzle plate of the ink print head 18 Cap and consists of an elastically deformable ink-resistant plastic or rubber. The cleaning facility 26 has the shape of a radially from the peripheral surface the disk 20 protruding axially aligned Plate. It is also made of an elastically deformable ink-resistant plastic or rubber formed. The support section 28 is a section enlarged Disc diameter. It extends over the entire Width of the disc 20. Is the latter rotated so that the Support section 28 faces the ink print head 18, the surface of the support section 28 has the same area with the platen 14.

Die Scheibe 20 ist innerhalb der Lücke 16 in Richtung eines Doppelpfeils B zwischen den Positionen 20' (mit durchgezogenen Linien dargestellt) und 20" (gestrichelt gezeichnet) verschieblich. In der Position 20" ist die Scheibe 20 in einer Winkelstellung dargestellt, in der die Abdeckeinrichtung 24 dem Tintendruckkopf 18 zugewandt ist. In dieser Winkelstellung ist die kappenförmige Gestalt der Abdeckeinrichtung 24 zu erkennen. Durch die Verschiebbarkeit der Scheibe 20 wird es möglich, unterschiedlich breite Bon-Papierstreifen 30 oder Journal-Papierstreifen 32 zu verwenden. Die Einstellung der Scheibe 20 beim Bedrucken eines die Lücke 16 übergreifenden Belegs 34 wird weiter unten beschrieben.The disc 20 is in the direction of a within the gap 16 Double arrow B between positions 20 '(with solid lines) and 20 "(dashed drawn) movable. In position 20 "is the Disc 20 shown in an angular position in which the cover device 24 faces the ink print head 18 is. The cap-like shape is in this angular position the cover device 24 can be seen. Through the Slidability of the disc 20, it becomes possible to be different wide receipt paper strips 30 or journal paper strips 32 to use. The setting of the Disc 20 when printing a gap 16 overlapping Document 34 is described below.

Fig. 2 zeigt eine schematisierte Seitenansicht des in Fig. 1 dargestellten Tintenstrahldruckers 10. Die Scheibe 20 ist auf einer koaxialen Welle 36 gelagert. Ferner ist sie in ihrem der Papierleitfläche 38 abgewandten Umfangsbereich mit einer Verzahnung 40 versehen, die mit einem durch einen Schrittmotor 42 antreibbaren Zahnrad 44 kämmt.Fig. 2 shows a schematic side view of the in Fig. 1 illustrated inkjet printer 10. The disc 20 is mounted on a coaxial shaft 36. Further is they in their peripheral area facing away from the paper guide surface 38 provided with a toothing 40 which with a gear 44 which can be driven by a stepper motor 42 combs.

Die Abdeckeinrichtung 24 ist an einem Ende eines radial zu der Scheibe 20 verstellbaren Schiebers 46 angeordnet, der zusammen mit der Scheibe 20 drehbar ist. An dem Schieber 46 ist ein parallel zu der Welle 36 ausgerichteter Steuerzapfen 48 befestigt, der in einer schneckenförmig die Achse 22 umgebenden Steuerkurve 50 geführt ist. Diese wiederum ist an einer an der Achse 22 gehaltenen, gegenüber der Scheibe 20 ortsfesten, also nicht mit dieser mitdrehenden Steuerplatte 52 ausgebildet. Der Schieber 46 ist im Bereich der Welle 36 mit einem Langloch 54 versehen, mit dem er auf der Welle 36 längsverschieblich gelagert ist.The cover 24 is radial at one end arranged to the disc 20 adjustable slide 46, which is rotatable together with the disc 20. To the Slider 46 is aligned parallel to the shaft 36 Control pin 48 attached in a helical shape the cam 22 surrounding the axis 22 is guided. This, in turn, is held on a shaft 22 fixed to the disc 20, so not with this co-rotating control plate 52 formed. The slider 46 is in the region of the shaft 36 with an elongated hole 54 provided with which it is longitudinally displaceable on the shaft 36 is stored.

Wenn die Scheibe 20 im Gegenuhrzeigersinn gedreht wird, läuft der Steuerzapfen 48 in der Steuerkurve 50 entlang. Der Schieber 46 wird dabei radial in Richtung der Achse 22 verschoben, so daß die Abdeckeinrichtung 24 von der Düsenplatte des Tintendruckkopfes 18 abgehoben und nach oben vor diesem weggeschwenkt wird. Bei weiterer Drehung der Scheibe 20 gelangt die Reinigungseinrichtung 26 in den Bereich des Tintendruckkopfes 18. Sie wird dabei elastisch ausgelenkt, so daß ihre voreilende, parallel zu der Achse 22 ausgerichtete Kante 56 die Düsenplatte des Tintendruckkopfes 18 überstreicht und dabei auf dieser haftende Verunreinigungen abstreift. Durch mehrfaches Hin- und Herdrehen der Scheibe 20 kann die Reinigungswirkung noch erhöht werden. Zum Drucken wird die Scheibe 20 weitergedreht, bis der Stützabschnitt 28 dem Druckbereich 18 gegenübersteht. Nun kann letzterer in Druckzeilenrichtung über den gesamten Druckbereich verschoben werden.If the disc 20 is rotated counterclockwise, the control pin 48 runs along the cam 50. The slide 46 is radial in the direction of the axis 22 moved so that the cover 24 of the Nozzle plate of the ink print head 18 lifted off and after is swung away in front of this. With further rotation the disk 20 enters the cleaning device 26 the area of the ink print head 18. It becomes elastic deflected so that their leading, parallel to the axis 22 aligned edge 56 the nozzle plate of the Ink printhead 18 sweeps over and on this removes any adhering contaminants. By multiple Turning the disk 20 back and forth can have the cleaning effect still be increased. The disk 20 is used for printing rotated further until the support section 28 reaches the pressure area 18 faces. Now the latter can be in the print line direction can be moved across the entire printing area.

Soll ein die Lücke 16 übergreifender Beleg 34 bedruckt werden, wird die Scheibe 20, ausgehend von der in Fig. 2 dargestellten Stellung, in der der Druckbereich 18 abgedeckt ist, folgendermaßen gesteuert: Die Vorderkante eines dem Tintenstrahldrucker 10 in Richtung des Pfeils C zugeführten Belegs 34 wird von einer vor dem Druckgegenlager 14 angeordneten ersten Lichtschranke 58 erkannt, worauf eine nicht dargestellte Belegtransporteinrichtung angehalten wird. Anschließend wird die Scheibe 20 wie oben beschrieben gedreht, bis der Stützabschnitt 28 dem Tintendruckkopf 18 gegenübersteht. Die Lücke 16 ist dadurch weitgehend geschlossen, so daß der Beleg 34 auch in diesem Bereich unterstützt wird. Das Erreichen dieser Stellung wird an Hand der Zahl der dem Schrittmotor 42 zugeführten Impulse festgestellt und damit die Belegtransporteinrichtung freigegeben. Nach dem Bedrucken des Belegs 34 wird dieser entweder in oder gegen die Richtung des Pfeils C aus dem Tintenstrahldrucher 10 transportiert. Der Beleg 34 hat den Tintenstrahldrucher 10 mit Sicherheit verlassen, wenn weder die erste Lichtschranke 58 noch eine oberhalb des Druckgegenlagers 14 angeordnete zweite Lichtschranke 60 das Vorhandensein eines Belegs meldet. Die Scheibe 20 wird dann im Uhrzeigersinn in die Stellung zurückgedreht, in der die Abdeckeinrichtung 24 die Düsenplatte des Tintendruckkopfes 18 abdeckt, was wiederum an Hand der Zahl der dem Schrittmotor 42 zugeführten Impulse festgestellt wird.Should a document 34 overlap the gap 16 be printed are, the disc 20, starting from the in Fig. 2nd shown position, in which the printing area 18 covered is controlled as follows: The leading edge of a the inkjet printer 10 in the direction of arrow C fed document 34 is from one in front of the platen 14 arranged first light barrier 58 recognized, whereupon a document transport device, not shown is stopped. Then the disc 20 is like described above until the support portion 28 the Ink printhead 18 faces. The gap 16 is thereby largely closed, so that the document 34 also in this area is supported. Reaching this Position is based on the number of the stepper motor 42nd fed impulses determined and thus the document transport device Approved. After printing on the Document 34 is either in or against the direction arrow C transported from the ink jet printer 10. The document 34 has the inkjet printer 10 with Leave safety if neither the first photoelectric sensor 58 another one arranged above the platen 14 second light barrier 60 the presence of a document reports. The disc 20 is then turned clockwise into the Turned back position in which the cover 24th the nozzle plate of the ink printhead 18 covers what again based on the number of the stepper motor 42 fed Impulses is determined.

Fig. 3 zeigt ein zweites Ausführungsbeispiel eines Tintenstrahldruckers 100 in einer schematischen Draufsicht. Dieser unterscheidet sich von dem in den Figuren 1 und 2 dargestellten Tintenstrahldrucker 10 dadurch, daß die Achse 122 und damit die Welle 136 der Scheibe 120 senkrecht zu dem Druckgegenlager 114', 114" und parallel zur Ebene eines Aufzeichnungsträgers 134 ausgerichtet ist. Die Scheibe 120 ist in ihrer druckbereiten Stellung gezeigt, sonst ist die Anordnung aber mit der in Fig. 2 gezeigten identisch. Gleiche Positionen sind deshalb mit gleichen Bezugszeichen gekennzeichnet.Fig. 3 shows a second embodiment of an ink jet printer 100 in a schematic top view. This differs from that in FIGS. 1 and 2 illustrated inkjet printer 10 in that the Axis 122 and thus the shaft 136 of the disk 120 perpendicular to the platen 114 ', 114 "and parallel to Level of a recording medium 134 is aligned. The disk 120 is shown in its ready-to-print position, otherwise the arrangement is the same as that shown in FIG. 2 identical. The same positions are therefore with marked with the same reference numerals.

Claims (9)

  1. Ink jet printer (10, 110) having an ink jet print head (18) which can be displaced parallel to a print line, and a print backing support (14, 14', 14"; 114', 114") used to support a recording medium (30, 32, 34, 134) opposite the ink jet print head (18) and aligned parallel to the print line, a covering device (24) and a cleaning device (26) for the ink nozzles of the ink jet print head (18), the covering device (24) and the cleaning device (26) being arranged on the periphery of a circular or circular-segment-like disc (20; 120) arranged in the printing area of the ink jet print head (18), it being possible for the disc to rotate about an axis (22; 122) extending through the centre of the circle, the print backing support (14) being divided by a gap (16) into two parts (14', 14"; 114', 114"), characterized in that the circular or circular-segment-like disc (20; 120) is located in the gap (16) and in that a supporting section (28) for the recording medium (34; 134) is arranged on the periphery of the circular or circular-segment-like disc (20; 120).
  2. Ink jet printer according to Claim 1, characterized in that the axis (22; 122) is aligned parallel to the print backing support (14, 14', 14"; 114', 114") or perpendicular thereto and parallel to the plane of the recording medium (34, 134).
  3. Ink jet printer according to Claim 1 or 2, characterized in that the disc (20, 120) can be rotated by a motor (42), in particular a stepping motor.
  4. Ink jet printer according to Claim 3, characterized in that the disc (20, 120) bears a toothing system (40), at least on part of its periphery, which meshes with a gear wheel (44) driven by the motor (42).
  5. Ink jet printer according to one of the preceding claims, characterized in that the disc (20; 120) can be displaced along the print backing support (14, 14', 14"; 114', 114").
  6. Ink jet printer according to one of the preceding claims, characterized in that the covering device (24) is connected to the disc (20, 120) via a radially adjustable slider (46), there being fixed to the slider (46) a control pin (48) which is guided in a snail-shaped control curve (50) which surrounds the axis (22; 122) and is formed on a contact plate (52) which is held on the axis (22; 122) and is stationary with respect to the disc (20; 120).
  7. Ink jet printer according to one of the preceding claims, characterized in that the covering device (24) is cap-like.
  8. Ink jet printer according to one of the preceding claims, characterized in that the cleaning device (26) is plate-like and resiliently deformable and projects radially from the peripheral surface of the disc (20, 120).
  9. Ink jet printer according to the preceding claims, characterized in that the cleaning device (26) is arranged between the covering device (24) and the supporting section (28).
EP98919075A 1997-06-25 1998-03-26 Ink jet printer with a nozzle covering and cleaning device Expired - Lifetime EP0991521B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19726971A DE19726971C1 (en) 1997-06-25 1997-06-25 Inkjet printer with a nozzle cover and cleaning device
DE19726971 1997-06-25
PCT/DE1998/000890 WO1999000253A1 (en) 1997-06-25 1998-03-26 Ink jet printer with a nozzle covering and cleaning device

Publications (2)

Publication Number Publication Date
EP0991521A1 EP0991521A1 (en) 2000-04-12
EP0991521B1 true EP0991521B1 (en) 2001-06-06

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Family Applications (1)

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EP98919075A Expired - Lifetime EP0991521B1 (en) 1997-06-25 1998-03-26 Ink jet printer with a nozzle covering and cleaning device

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US (1) US6361141B1 (en)
EP (1) EP0991521B1 (en)
JP (1) JP2003520562A (en)
DE (2) DE19726971C1 (en)
ES (1) ES2158682T3 (en)
WO (1) WO1999000253A1 (en)

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ATE309102T1 (en) * 2000-05-24 2005-11-15 Silverbrook Res Pty Ltd PAPER THICKNESS SENSOR IN A PRINTER
US6663215B2 (en) * 2001-10-25 2003-12-16 Hewlett-Packard Company, L.P. Printhead service station
CA2364396A1 (en) * 2001-12-05 2003-06-05 Andrew J.S. Booth Inkjet printer with nozzle maintenance system in printing media carrier
US6789873B2 (en) * 2001-12-05 2004-09-14 Creo Srl Inkjet printer with nozzle maintenance system relocated by media carrier
US6851787B2 (en) * 2003-03-06 2005-02-08 Hewlett-Packard Development Company, L.P. Printer servicing system and method
US6932455B2 (en) * 2003-04-30 2005-08-23 Hewlett-Packard Development Company, L.P. Printing apparatus and method
US7284693B2 (en) * 2005-03-09 2007-10-23 Diebold Self-Service Systems Division Of Diebold, Incorporated Check accepting and cash dispensing automated banking machine system and method
KR100708149B1 (en) 2005-06-25 2007-04-17 삼성전자주식회사 Inkjet line printer
JP5195365B2 (en) * 2008-01-23 2013-05-08 セイコーエプソン株式会社 Ink ejection device
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JP5212121B2 (en) * 2008-02-27 2013-06-19 セイコーエプソン株式会社 Liquid ejector
CN107284032A (en) * 2017-08-02 2017-10-24 中国建筑设计院有限公司 A kind of printing head protection device for fully automatic digital blueprint printer

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Publication number Publication date
JP2003520562A (en) 2003-07-02
DE19726971C1 (en) 1998-12-17
ES2158682T3 (en) 2001-09-01
EP0991521A1 (en) 2000-04-12
US6361141B1 (en) 2002-03-26
WO1999000253A1 (en) 1999-01-07
DE59800826D1 (en) 2001-07-12

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