EP0087759A2 - Capping and cleaning device for ink jet print heads - Google Patents

Capping and cleaning device for ink jet print heads Download PDF

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Publication number
EP0087759A2
EP0087759A2 EP83101787A EP83101787A EP0087759A2 EP 0087759 A2 EP0087759 A2 EP 0087759A2 EP 83101787 A EP83101787 A EP 83101787A EP 83101787 A EP83101787 A EP 83101787A EP 0087759 A2 EP0087759 A2 EP 0087759A2
Authority
EP
European Patent Office
Prior art keywords
sealing plate
sealing
plate
nozzle plate
outlet openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83101787A
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German (de)
French (fr)
Other versions
EP0087759A3 (en
EP0087759B1 (en
Inventor
Wilhelm Kirner
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.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0087759A2 publication Critical patent/EP0087759A2/en
Publication of EP0087759A3 publication Critical patent/EP0087759A3/en
Application granted granted Critical
Publication of EP0087759B1 publication Critical patent/EP0087759B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • 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—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device for covering the outlet openings of an ink writing head is described in DE-AS 23 21 273.
  • coverage is only given there if the print head is in a certain position.
  • the write head In order to cover the outlet openings of the nozzle channels of the write head, the write head must always be brought into a specific position. This complicates the operation of the print head in a printer device and also requires a complex structure. Otherwise, only a cover, but not also a cleaning of the outlet openings, can thus be achieved.
  • a protection and cleaning device for writing heads in ink writing devices in which an ink deflector and an attached wiping element can be pivoted in front of the nozzle plate of the writing head via an electrically controllable device. If the ink deflector is in front of the nozzle plate, the outlet openings are protected from contamination. The wiping element resiliently abutting the nozzle plate also cleans the outlet openings during a pivoting process.
  • This device which is structurally connected to the write head, allows the deflector and the stripping element to be actuated independently of the position of the write head, but the cover is not sufficient, since between the deflector and the nozzle plate is finer Dust can enter, which clogs the nozzles. However, the outlet openings are also exposed to the air, which in many cases causes the ink to dry out quickly and thus also clogs the outlet nozzles.
  • the object of the invention is to provide a device which, regardless of the position of the writing carriage, ensures a safe and reliable closure of the outlet openings, which at the same time allows external contaminations of the outlet openings to be removed, and which is characterized by a simple construction.
  • the advantages of the device according to the invention are that the sealing plate and the nozzle plate are fastened together on the write head, an almost absolute security against leakage of ink being ensured by means of a sealing ring. Furthermore, it is an advantage that the swiveling sealing element on the nozzle plate, which has a cutout, keeps most of the nozzle plate covered even when the outlet openings are open, and additional cleaning can thus be omitted. It is also an advantage that the sharp edges of the cutout in the sealing plate represent a very effective cleaning element for the outlet openings of the nozzle plate, since when the sealing plate is pivoted and thus also the cutout over the outlet openings, external contaminants are reliably removed.
  • an embodiment of the invention provides that the sealing plate is rotatably mounted and can be pivoted in a simple manner via a crank mechanism. This is associated with a simple structure which has only an insignificant effect on the overall structure of the write head.
  • the sealing plate can. of the invention with a film, e.g. be coated with a Teflon film, which enables easy movement with very high wear resistance. This in turn has a favorable effect on the dimensioning of the drive element.
  • the print head shown in FIG. 1 consists of a plastic body 1, in which the ink channels 3 run between a supply part 2 and the boundary surface of the write head facing a recording medium (not shown here).
  • the writing head is closed off with a nozzle plate 4, through the outlet openings 5 of which ink droplets are ejected in the direction of the recording medium.
  • the drive elements for the ink channels 3 and thus for the ejection of ink droplets are, for example, piezo elements. These are located inside the print head and are not visible in this representation.
  • the nozzle plate 4 is surrounded by a sealing ring 6.
  • the sealing plate 7 is provided, which is coated on its side facing the print head with a film, for example with a Teflon film 8.
  • the sealing plate te 7 is fastened to the write head 1 together with the nozzle plate 4 by means of a resilient bracket 9.
  • a resilient bracket 9 For this purpose, two lugs 10 and 11 are provided on the write head 1, in which the bracket 9 engages. It is held by means of a tension spring 12.
  • the sealing ring is deformed by the pressing force of the bracket 9, so that an exact contact of the nozzle plate 4 on the boundary or mouth surface of the writing head and thus a very secure seal is guaranteed.
  • the sealing plate 7 is rotatably mounted on a pin 13 which is also attached to the writing head.
  • FIG. 2 shows the write head from the front.
  • the sealing plate 7 In front of the nozzle plate 4, the sealing plate 7 is pivotally mounted about the pin 13 in such a way that the cutout 14 of the sealing plate 7 either closes the outlet openings of the nozzle plate 7 (position shown in FIG. 2) or releases it.
  • the dimensions of the sealing plate 7 are such that it covers the nozzle plate both in the open position (outlet openings released) and in the closed position (outlet openings closed).
  • the sealing surface of the sealing plate 7 is thus covered in any case, so that no additional cleaning of the sealing plate is required.
  • the pivoting takes place via a crank mechanism 17, the crank pin 15 of which engages in a slot-shaped recess 16 of the sealing plate 7.
  • the crank mechanism 17 is moved back and forth between two stops 18 and 19 by means of a drive element (not shown here), as a result of which the sealing plate 7 with the cutout 14 is also displaced on the nozzle plate 4 and closes or releases the outlet openings.
  • This arrangement enables movement of the sealing plate 7 regardless of the position of the write head, ie the sealing plate 7 and the drive mechanism 15, 17, 18 and 19 are the same Print head directly assigned.
  • the cutout 14 is made sharp-edged, a wiping function is carried out with each pivoting movement of the sealing plate and thus with each pivoting movement of the cutout 14, with which the outlet openings of the nozzle plate are reliably protected from external contaminants such as dust particles, residual ink, etc. getting cleaned.
  • the sealing plate 7 has only a very small thickness, so that the distance between e.g. a platen and the print head is only slightly reduced.

Landscapes

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

Abstract

Die Erfindung betrifft eine Abdeck und Reinigungsvorrichtung für Tintenschreibköpfe. Sie besteht aus einer vor der Düsenplatte verschwenkbar angeordneten Dichtplatte. die im Bereich der Austrittsöffnungen der Düsenplatte einen Ausschnitt mit scharfen Kanten aufweist und die mittels eines, die Andruckkraft für die Dichtplatte und die Düsenplatte liefernden, Spannbügels gehalten wird; zum Antrieb der Dichtplatte ist ein Kurbelmechanismus vorgesehen, dessen Kurbelstift in einen Schlitz der Dichtplatte eingreift, und der zwischen zwei Anschlägen hin- und herbewegbar ist; Dichtplatte und Antrieb sind dem Schreibkopf zugeordnet; die Dichtplatte kann mit einer Teflonfolie beschichtet sein.The invention relates to a cover and cleaning device for ink writing heads. It consists of a sealing plate arranged pivotably in front of the nozzle plate. which has a cutout with sharp edges in the area of the outlet openings of the nozzle plate and which is held by means of a clamping bracket which supplies the pressing force for the sealing plate and the nozzle plate; a crank mechanism is provided for driving the sealing plate, the crank pin of which engages in a slot of the sealing plate and which can be moved back and forth between two stops; Sealing plate and drive are assigned to the print head; the sealing plate can be coated with a Teflon film.

Description

Die Erfindung betrifft eine Vorrichtung gemäß dem-Oberbegriff des Patentanspruches 1.The invention relates to a device according to the preamble of claim 1.

Eine Vorrichtung zur Abdeckung der Austrittsöffnungen eines Tintenschreibkopfes ist in der DE-AS 23 21 273 beschrieben. Die Abdeckung erfolgt dort aber jeweils nur dann, wenn sich der Schreibkopf in einer bestimmten Lage befindet. Um die Austrittsöffnungen der Düsenkanäle des Schreibkopfes abzudecken, muß der Schreibkopf stets in eine bestimmte Position gebracht werden. Das erschwert die Arbeitsweise des Schreibkopfes in einer Druckereinrichtung und bedingt darüberhinaus einen aufwendigen Aufbau. Im übrigen kann damit lediglich eine Abdeckung, nicht jedoch zugleich auch eine Reinigung der Austrittsöffnungen erreicht werden.A device for covering the outlet openings of an ink writing head is described in DE-AS 23 21 273. However, coverage is only given there if the print head is in a certain position. In order to cover the outlet openings of the nozzle channels of the write head, the write head must always be brought into a specific position. This complicates the operation of the print head in a printer device and also requires a complex structure. Otherwise, only a cover, but not also a cleaning of the outlet openings, can thus be achieved.

Aus der DE-PS 26 07 313 ist eine Schutz- und Reinigungsvorrichtung für Schreibköpfe in Tintenschreibeinrichtungen bekannt, bei der über eine elektrisch ansteuerbare Vorrichtung eine Tintenabweisblende und ein daran befestigtes Abstreifelement vor die Düsenplatte des Schreibkopfes verschwenkbar ist. Befindet sich die Tintenabweisblende vor der Düsenplatte, so werden die Austrittsöffnungen vor Verunreinigungen geschützt. Das federnd an die Düsenplatte anliegende Abstreifelement reinigt während eines Schwenkvorganges auch die Austrittsöffnungen. Diese Vorrichtung, die konstruktiv mit dem Schreibkopf verbunden ist, ermöglicht zwar, daß die Abweisblende und das Abstreifelement unabhängig von der Stellung des Schreibkopfes betätigt werden können, doch ist die Abdeckung nicht ausreichend, da zwischen der Abweisblende und der Düsenplatte feiner Staub eintreten kann, der zur Verstopfung der Düsen führt. Die Austrittsöffnungen sind aber auch der Luft ausgesetzt, was in vielen Fällen zu einem schnellen Eintrocknen der Tinte und damit ebenfalls zur Verstopfung der Austrittsdüsen führt.From DE-PS 26 07 313 a protection and cleaning device for writing heads in ink writing devices is known, in which an ink deflector and an attached wiping element can be pivoted in front of the nozzle plate of the writing head via an electrically controllable device. If the ink deflector is in front of the nozzle plate, the outlet openings are protected from contamination. The wiping element resiliently abutting the nozzle plate also cleans the outlet openings during a pivoting process. This device, which is structurally connected to the write head, allows the deflector and the stripping element to be actuated independently of the position of the write head, but the cover is not sufficient, since between the deflector and the nozzle plate is finer Dust can enter, which clogs the nozzles. However, the outlet openings are also exposed to the air, which in many cases causes the ink to dry out quickly and thus also clogs the outlet nozzles.

Die Aufgabe der Erfindung besteht darin, eine Vorrichtung zu schaffen, die von der Stellung des Schreibwagens unabhängig einen sicheren und zuverlässigen Verschluß der Austrittsöffnungen gewährleistet, die es zugleich gestattet, äußere Verunreinigungen der Austrittsöffnungen zu beseitigerl, und die sich durch einen einfachen konstruktiven Aufbau auszeichnet.The object of the invention is to provide a device which, regardless of the position of the writing carriage, ensures a safe and reliable closure of the outlet openings, which at the same time allows external contaminations of the outlet openings to be removed, and which is characterized by a simple construction.

Diese Aufgabe wird mit den im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmalen gelöst.This object is achieved with the features specified in the characterizing part of patent claim 1.

Die Vorteile der erfindungsgemäßen Vorrichtung bestehen darin, daß die Dichtplatte und die Düsenplatte gemeinsam am Schreibkopf befestigt werden, wobei mittels eines Dichtringes eine nahezu absolute Sicherheit gegen das Austreten von Tinte gewährleistet ist. Weiterhin ist es ein Vorteil, daß durch das als Dichtplatte auf der Düsenplatte verschwenkbare und einen Ausschnitt aufweisende Abdeckelement auch bei freigegebenen Austrittsöffnungen der größte Teil der Düsenplatte abgedeckt bleibt, und somit eine zusätzliche Reinigung entfallen kann. Weiterhin ist es ein Vorteil, daß die scharfen Kanten des Ausschnittes in der Dichtplatte ein sehr wirksames Reinigungselement für die Austrittsöffnungen der Düsenplatte darstellen, da beim Verschwenken der Dichtplatte und damit auch des Ausschnittes über die Austrittsöffnungen hinweg äußere Verunreinigungen sicher beseitigt werden.The advantages of the device according to the invention are that the sealing plate and the nozzle plate are fastened together on the write head, an almost absolute security against leakage of ink being ensured by means of a sealing ring. Furthermore, it is an advantage that the swiveling sealing element on the nozzle plate, which has a cutout, keeps most of the nozzle plate covered even when the outlet openings are open, and additional cleaning can thus be omitted. It is also an advantage that the sharp edges of the cutout in the sealing plate represent a very effective cleaning element for the outlet openings of the nozzle plate, since when the sealing plate is pivoted and thus also the cutout over the outlet openings, external contaminants are reliably removed.

Eine Ausgestaltung der Erfindung sieht vor, daß die Dichtplatte drehbar gelagert ist, und in einfacher Weise über einen Kurbelmechanismus verschwenkbar ist. Damit ist ein einfacher Aufbau verbunden, der den Gesamtaufbau des Schreibkopfes nur unwesentlich'beeinflußt. Die Dichtplatte kann gemäß weiterer Ausgestaltung. der Erfindung mit einer Folie, z.B. mit einer Teflonfolie beschichtet sein, die eine leicht gängige Bewegung bei sehr großer Verschleißfestigkeit ermöglicht. Das wirkt sich wiederum günstig auf die Dimensionierung des Antriebselementes aus.An embodiment of the invention provides that the sealing plate is rotatably mounted and can be pivoted in a simple manner via a crank mechanism. This is associated with a simple structure which has only an insignificant effect on the overall structure of the write head. According to a further embodiment, the sealing plate can. of the invention with a film, e.g. be coated with a Teflon film, which enables easy movement with very high wear resistance. This in turn has a favorable effect on the dimensioning of the drive element.

Einzelheiten der Erfindung werden im folgenden anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles erläutert. Dabei zeigt

  • Fig. 1 einen Schreibkopf in Seitenansicht und
  • Fig. 2 den Schreibkopf gemäß Fig. 1 in Vorderansicht mit Einzelheiten des Antriebsmechanismus.
Details of the invention are explained below with reference to an embodiment shown in the drawings. It shows
  • Fig. 1 shows a print head in side view
  • Fig. 2 shows the write head of FIG. 1 in front view with details of the drive mechanism.

Der in Fig. 1 dargestellte Schreibkopf besteht aus einem Kunststoffkörper 1, in dem zwischen einem Versorgungsteil 2 und der einem hier nicht dargestellten Aufzeichnungsträger zugewandten Begrenzungsfläche des Schreibkopfes die Tintenkanäle 3 verlaufen. Der Schreibkopf ist mit einer.Düsenplatte 4 abgesch-lossen, über deren Austrittsöffnungen 5 in Richtung auf den Aufzeichnungsträger Tintentröpfchen ausgestoßen werden. Die Antriebselemente für die Tintenkanäle 3 und damit für den Ausstoß von Tintentröpfchen sind beispielsweise Piezoelemente. Diese befinden sich im Inneren des Schreibkopfes und sind bei dieser Darstellung nicht sichtbar. Die Düsenplatte 4 ist von einem Dichtring 6 umgeben. Zur Abdeckung und zur Reinigung der Austrittsöffnungen 5 ist die Dichtplatte 7 vorgesehen, die auf ihrer, dem Schreibkopf zugewandten Seite mit einer Folie, beispielsweise mit einer Teflonfolie 8 überzogen ist. Die Dichtplatte 7 ist mittels eines federnden Bügels 9 zusammen mit der Düsenplatte 4 am Schreibkopf 1 befestigt. Am Schreibkopf 1 sind zu diesem Zweck zwei Ansätze 10 und 11 vorgesehen, in die der Bügel 9 eingreift. Er wird mittels einer Spannfeder 12 gehalten. Dabei wird der Dichtring durch die Andruckkraft des Bügels 9 verformt, so daß eine exakte Anlage der Düsenplatte 4 auf der Begrenzungs- oder Mündungsfläche des Schreibkopfs und damit eine sehr sichere Abdichtung gewährleistet ist. Die Dichtplatte 7 ist an einem Stift 13 der ebenfalls am Schreibkopf befestigt ist, drehbar gelagert.The print head shown in FIG. 1 consists of a plastic body 1, in which the ink channels 3 run between a supply part 2 and the boundary surface of the write head facing a recording medium (not shown here). The writing head is closed off with a nozzle plate 4, through the outlet openings 5 of which ink droplets are ejected in the direction of the recording medium. The drive elements for the ink channels 3 and thus for the ejection of ink droplets are, for example, piezo elements. These are located inside the print head and are not visible in this representation. The nozzle plate 4 is surrounded by a sealing ring 6. To cover and to clean the outlet openings 5, the sealing plate 7 is provided, which is coated on its side facing the print head with a film, for example with a Teflon film 8. The sealing plate te 7 is fastened to the write head 1 together with the nozzle plate 4 by means of a resilient bracket 9. For this purpose, two lugs 10 and 11 are provided on the write head 1, in which the bracket 9 engages. It is held by means of a tension spring 12. The sealing ring is deformed by the pressing force of the bracket 9, so that an exact contact of the nozzle plate 4 on the boundary or mouth surface of the writing head and thus a very secure seal is guaranteed. The sealing plate 7 is rotatably mounted on a pin 13 which is also attached to the writing head.

Die Wirkungsweise der Vorrichtung wird im folgenden unter Bezugnahme auf Fig. 2 erläutert. Die Darstellung nach Fig. 2 zeigt den Schreibkopf von vorne. Vor der Düsenplatte 4 ist die Dichtplatte 7 um den Stift 13 derart verschwenkbar gelagert, daß der Ausschnitt 14 der Dichtplatte 7 entweder die Austrittsöffnungen der Düsenplatte 7 verschließt (dargestellte Lage in Fig. 2) oder freigibt. Die Dichtplatte 7 ist in ihren Abmessungen derart dimensioniert, daß sie sowohl in der offenen Stellung (Austrittsöffnungen freigegeben) als auch in der geschlossenen Stellung (Austrittsöffnungen verschlossen) die Düsenplatte abdeckt. Die Dichtfläche der Dichtplatte 7 ist damit in-jedem Fall abgedeckt, so daß es keiner zusätzlichen Reinigung der Dichtplatte bedarf. Die Verschwenkung erfolgt über einen Kurbelmechanismus 17, dessen Kurbelstift 15 in eine schlitzförmige Ausnehmung 16 der Dichtplatte 7 eingreift. Der Kurbelmechanismus 17 wird mittels eines hier nicht dargestellten Antriebselementes zwischen zwei Anschlägen 18 und 19 hin-und herbewegt, wodurch sich auch die Dichtplatte 7 mit dem Ausschnitt 14 auf der Düsenplatte 4 verschiebt, und die Austrittsöffnungen verschließt oder freigibt. Diese Anordnung ermöglicht eine Bewegung der Dichtplatte 7 unabhängig von der Stellung des Schreibkopfes, d.h. die Dichtplatte 7 und der Antriebsmechanismus 15, 17, 18 und 19 sind dem Schreibkopf unmittelbar zugeordnet.The operation of the device is explained below with reference to FIG. 2. 2 shows the write head from the front. In front of the nozzle plate 4, the sealing plate 7 is pivotally mounted about the pin 13 in such a way that the cutout 14 of the sealing plate 7 either closes the outlet openings of the nozzle plate 7 (position shown in FIG. 2) or releases it. The dimensions of the sealing plate 7 are such that it covers the nozzle plate both in the open position (outlet openings released) and in the closed position (outlet openings closed). The sealing surface of the sealing plate 7 is thus covered in any case, so that no additional cleaning of the sealing plate is required. The pivoting takes place via a crank mechanism 17, the crank pin 15 of which engages in a slot-shaped recess 16 of the sealing plate 7. The crank mechanism 17 is moved back and forth between two stops 18 and 19 by means of a drive element (not shown here), as a result of which the sealing plate 7 with the cutout 14 is also displaced on the nozzle plate 4 and closes or releases the outlet openings. This arrangement enables movement of the sealing plate 7 regardless of the position of the write head, ie the sealing plate 7 and the drive mechanism 15, 17, 18 and 19 are the same Print head directly assigned.

Gestaltet man, wie durch die Erfindung vorgeschlagen, den Ausschnitt 14 scharfkantig aus, so wird bei jeder Schwenkbewegung der Dichtplatte und damit bei jeder Schwenkbewegung des Ausschnittes 14 eine Wischfunktion durchgeführt, mit der die Austrittsöffnungen der Düsenplatte sicher von äußeren Verunreinigungen wie Staubteilchen, Tintenrestchen usw. gereinigt werden.If, as proposed by the invention, the cutout 14 is made sharp-edged, a wiping function is carried out with each pivoting movement of the sealing plate and thus with each pivoting movement of the cutout 14, with which the outlet openings of the nozzle plate are reliably protected from external contaminants such as dust particles, residual ink, etc. getting cleaned.

Die Dichtplatte 7 weist nur eine sehr geringe Dicke auf, so daß der Abstand zwischen z.B. einer Schreibwalze und dem Schreibkopf nur unwesentlich reduziert wird.The sealing plate 7 has only a very small thickness, so that the distance between e.g. a platen and the print head is only slightly reduced.

BezugszeichenlisteReference symbol list

  • 1 Kunststoffkörper, Schreibkopf1 plastic body, print head
  • 2 Versorgungsteil2 supply part
  • 3 Tintenkanäle3 ink channels
  • 4 Düsenplatte4 nozzle plate
  • 5 Austrittsöffnungen5 outlet openings
  • 6 Dichtung6 seal
  • 7 Dichtplatte7 sealing plate
  • 8 Teflonfolie8 Teflon film
  • 9 federnder Bügel9 spring clips
  • 10,11 Ansätze10.11 approaches
  • 12 Spannfeder12 tension spring
  • 13 Stift13 pin
  • 14 Ausschnitt14 detail
  • 15 Kurbelstift15 crank pin
  • 16 schlitzförmige Ausnehmung16 slot-shaped recess
  • 17 Kurbelmechanismus17 crank mechanism
  • 18, 19 Anschläge18, 19 stops

Claims (4)

1. Vorrichtung-zum Abdichten und zum Reinigen der Austrittsöffnungen einer Düsenplatte in einem Tintenschreibkopf unter Verwendung eines, die Austrittsöffnungen abdeckenden Abdichtelementes,
dadurch gekennzeichnet , daß das Abdichtelement eine auf der Düsenplatte (4) verschiebbare Dichtplatte (7) ist, daß die Dichtplatte (7) einen Ausschnitt (14) aufweist, der während der Schreibperioden vor die Austrittsöffnungen (5) gelangt und diese freigibt, daß der Ausschnitt (14) scharfkantig ausgebildet ist, und bei einer Verschiebung auf der Düsenplatte (4) eine Reinigungsfunktion ausführt, daß die Dichtplatte (7) und die Düsenplatte (4) durch ein gemeinsames Andrückelement (9,12) an die Begrenzungsfläche des Schreibkopfes (1), an der die Tintenkanäle (3) enden, andrückbar sind, und daß zwischen der Begrenzungsfläche des Schreibkopfes und der Düsenplatte (4) ein Dichtring (6) vorgesehen ist, der durch das Andruckelement (9) deformiert wird. 1. Device for sealing and for cleaning the outlet openings of a nozzle plate in an ink writing head using a sealing element which covers the outlet openings,
characterized in that the sealing element is a sealing plate (7) which can be displaced on the nozzle plate (4), that the sealing plate (7) has a cutout (14) that reaches the outlet openings (5) during the writing periods and releases them, that the cutout (14) is sharp-edged and performs a cleaning function when displaced on the nozzle plate (4), that the sealing plate (7) and the nozzle plate (4) can be pressed by a common pressing element (9, 12) onto the boundary surface of the writing head (1) at which the ink channels (3) end, and that between the boundary surface of the write head and the nozzle plate (4) a sealing ring (6) is provided, which is deformed by the pressure element (9). 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet , daß die Dichtplatte (7) auf einem am Schreibkopf (1) befestigten Stift (13) drehbar gelagert ist,
daß die Dichtplatte (7) eine schlitzförmige Ausnehmung (16) aufweist, in die der Kurbelstift (15) eines Kurbelmechanismus (17) eingreift.2. Device according to claim 1,
characterized in that the sealing plate (7) is rotatably mounted on a pen (13) attached to the write head (1),
that the sealing plate (7) has a slot-shaped recess (16) into which the crank pin (15) of a crank mechanism (17) engages. 3. Vorrichtung nach Anspruch 1 und 2,
d adurch gekennzeichnet , daß die Dichtplatte (7) sowohl in der offenen als auch in der geschlossenen Stellung die Düsenplatte (4) abdeckt.3. Device according to claim 1 and 2,
d a characterized in that the sealing plate (7) covers the nozzle plate (4) both in the open and in the closed position. 4. Vorrichtung nach Anspruch 1 bis 3,
dadurch gekennzeichnet , daß die Dichtplatte (7) auf der der Düsenplatte (4) zugewandten Seite mit einer Teflonfolie (8) überzogen ist.4. The device according to claim 1 to 3,
characterized in that the sealing plate (7) is covered on the side facing the nozzle plate (4) with a Teflon film (8).
EP83101787A 1982-02-26 1983-02-23 Capping and cleaning device for ink jet print heads Expired EP0087759B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3207072 1982-02-26
DE19823207072 DE3207072A1 (en) 1982-02-26 1982-02-26 COVER AND CLEANING DEVICE FOR INK WRITING HEADS

Publications (3)

Publication Number Publication Date
EP0087759A2 true EP0087759A2 (en) 1983-09-07
EP0087759A3 EP0087759A3 (en) 1985-05-15
EP0087759B1 EP0087759B1 (en) 1987-01-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101787A Expired EP0087759B1 (en) 1982-02-26 1983-02-23 Capping and cleaning device for ink jet print heads

Country Status (4)

Country Link
US (1) US4500894A (en)
EP (1) EP0087759B1 (en)
JP (1) JPS58158262A (en)
DE (1) DE3207072A1 (en)

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EP0237876A2 (en) * 1986-03-17 1987-09-23 Agfa-Gevaert AG Microfilm camera provided with indicating means for the originals

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* Cited by examiner, † Cited by third party
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DE3522799A1 (en) * 1985-06-26 1987-01-08 Philips Patentverwaltung COVER DEVICE FOR PROTECTING THE NOZZLE AREA OF AN INK JET PRINT HEAD
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Also Published As

Publication number Publication date
EP0087759A3 (en) 1985-05-15
US4500894A (en) 1985-02-19
EP0087759B1 (en) 1987-01-28
JPS58158262A (en) 1983-09-20
JPH0351586B2 (en) 1991-08-07
DE3207072A1 (en) 1983-09-15

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