EP0008349B1 - Precision guidance for the electrodes of a multi-electrode recording head for metal paper printers - Google Patents

Precision guidance for the electrodes of a multi-electrode recording head for metal paper printers Download PDF

Info

Publication number
EP0008349B1
EP0008349B1 EP79102337A EP79102337A EP0008349B1 EP 0008349 B1 EP0008349 B1 EP 0008349B1 EP 79102337 A EP79102337 A EP 79102337A EP 79102337 A EP79102337 A EP 79102337A EP 0008349 B1 EP0008349 B1 EP 0008349B1
Authority
EP
European Patent Office
Prior art keywords
electrodes
guide
grooves
electrode
metal paper
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
Application number
EP79102337A
Other languages
German (de)
French (fr)
Other versions
EP0008349A1 (en
Inventor
Kurt Hartmann
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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=6046586&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0008349(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to AT79102337T priority Critical patent/ATE3703T1/en
Publication of EP0008349A1 publication Critical patent/EP0008349A1/en
Application granted granted Critical
Publication of EP0008349B1 publication Critical patent/EP0008349B1/en
Expired 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/39—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material using multi-stylus heads
    • B41J2/395—Structure of multi-stylus heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00—Work holders
    • Y10S269/902—Work holder member with v-shaped notch or groove
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641—Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/71—Rod side to plate or side
    • Y10T403/7129—Laterally spaced rods
    • Y10T403/7141—Plural channels in connector

Definitions

  • the invention relates to a precision guide for the electrodes of a multi-electrode writing head for metal paper printers, consisting of a guide part with grooves running parallel to one another, the electrodes receiving grooves, from the flanks of which the electrodes are guided laterally, and a cover part placed thereon.
  • Electrode print heads for metal paper printers are known in various designs. Among other things, you have to ensure a certain mutual distance between the electrodes and - if abrasion problems of the electrodes are to be taken into account - to provide a way to guide the electrodes.
  • the electrodes seen in cross section, do not protrude beyond the grooves, that the cover part near the point where the electrodes emerge from the write head has a recess which runs transversely to the longitudinal axis of the electrode and in which an elastically deformable, non-conductive Element is arranged, the areas lying on the guide part are deformed and that protrudes into the grooves, fixing the electrodes located therein, and allows the electrodes to be tracked in the direction of their longitudinal axis.
  • the solution according to the invention has the advantage that the electrode is fixed in its position in the guide groove, even if its diameter should fluctuate due to predetermined tolerances. It rests on the groove flanks and cannot move sideways. Furthermore, it is possible, by appropriate dimensioning of the elastically deformable, non-conductive element, to ensure that the electrode lies against the groove flanks in a large longitudinal section of the groove guide. For this purpose, only the elastically deformable element needs to have a dimension in the direction of the electrode longitudinal axis which is of the order of magnitude of this longitudinal section.
  • US Pat. No. 2,718,450 describes a guide in which electrodes guided in grooves are pressed down by a rubber roller lying transversely to them. Seen in cross-section, however, the upper parts of the electrodes stand out of the grooves.
  • the rubber roller has such a frictional contact with the protruding parts of the electrodes that it can advance the electrodes in the grooves upon rotation.
  • the rear end of the electrode protrudes from the groove guide and its end near the write.
  • a spring-loaded contact ball is provided for making an electrical contact. The spring force for this ball presses the electrode against the rubber roller.
  • the electrode At its front, near-writing end, the electrode lies tangentially on a record carrier guided over a roll.
  • This roller can be pivoted against the electrode in order to generate a corresponding contact pressure.
  • the position of the electrode in the groove is determined by three points: the front edge of the electrode guide, the rubber roller and the contact ball. This does not result in the electrode resting on the groove flanks along the entire groove length.
  • the electrode In the swiveled-in state of the roller, in order to achieve a contact pressure of the electrode on the recording medium, as is required for a secure recording process, the electrode is pressed somewhat out of the front part of the groove against the rubber roller. This results in the possibility of an undesirable lateral movement of the electrode in its groove guide.
  • the precision guide 1 consists of three main parts: a guide part 2, a cover part 3 formed by a cover and a flexible element 5 running in a recess 4 of the cover part 3. Furthermore, it can be seen from Fig. 1, that the guide part 2 is provided with a number of adjacent guide grooves 6 in which the electrodes 7 run. For the sake of clarity, some of these are guides grooves shown without associated electrodes. On the writing side, the cover part 3 and the guide part 2 are each provided with a bevel (8; 9).
  • the resulting actual mouthpiece 10 of the precision guide has a design that accommodates the writing process, that is, it is slightly rounded both in the writing direction (direction of the double arrow 11) and perpendicularly to it (direction of the double arrow 12) in order to ensure perfect sliding and locking to prevent writing residue and dirt.
  • Both parts, both the cover part 3 and the guide part 2 are fixed in their outer position by appropriate stops and supports (not shown).
  • the cover part 3 can be fixed on the guide part 2 by simple locking screws. Other fixing and fastening options are conceivable.
  • This precision guide can be used in particular in a device for tracking electrodes, as described in German patent application P 2758150.6.
  • the electrodes 7 running in the grooves 6 can be tracked in the direction of the arrow 13 indicated by the dashed line if the wear is corresponding.
  • the device for tracking the electrodes is not the subject of the invention, it is therefore not described in more detail.
  • the cross section of the electrodes does not protrude over the grooves with their upper part; they basically have a lateral range of motion within the groove.
  • the element 5 designed as a flexible holding tube is provided, which runs in a recess 4 of the cover part 3.
  • This recess 4 has a prismatic shape; it is transverse to the direction of the electrodes.
  • the elastic flexible holding tube made of electrically non-conductive material is preferably made of polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • This holding tube has such a dimension that it is deformed when the precision guide is assembled at points A, B and C (see sectional view in FIG. 3) in such a way that the lower part of the holding tube (deformation area C) is open the electrode 7 running in the guide groove 6 acts and holds it in a fixed position without lateral freedom of movement (FIG. 2). This ensures that the electrodes 7 are guided in the individual grooves 6 without lateral freedom of movement.
  • the flexible holding tube which is preferably made of PTFE, has the property that it is possible to track the electrodes in the assembled state of the precision guide.
  • the reason for this is the corresponding surface properties of the holding tube (sliding friction).
  • Guide part 2 and cover part 3 must be made of a non-conductive material for understandable reasons so that the individual electrodes remain isolated from each other. Ceramic is preferably considered for such a material, but solutions are also conceivable in which electrically conductive metals are rendered non-conductive by appropriate surface treatment in the area of their surface.
  • FIG. 2 shows an enlarged partial sectional view of the precision guide according to FIG. 1 according to section line XX. The position of the individual electrodes 7 within their guide grooves 6 can be seen from this illustration. These guide grooves have a simple triangular shape. It can be seen how the element 5 designed as a holding tube is pressed slightly into these grooves and touches the electrodes 7 in the upper part and fixes them in their position within the grooves.

Landscapes

  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Handling Of Cut Paper (AREA)
  • Facsimile Heads (AREA)
  • Electronic Switches (AREA)

Abstract

Guide for electrodes in a metal paper printer comprising a multipart arrangement of a guide portion, with parallel grooves for the electrodes, and of a cover portion assembled to the guide portion. The cover portion has a recess extending transversely of the electrodes and retains an elastic, nonconductive, and deformable tube frictionally restraining the electrodes, yet allowing electrode advancement as required.

Description

Die Erfindung betrifft eine Präzisionsführung für die Elektroden eines Vielfachelektrodenschreibkopfes für Metallpapierdrucker, bestehend aus einem Führungsteil mit parallel zueinander verlaufenden, die Elektroden aufnehmenden Rillen, von deren Flanken die Elektroden seitlich geführt werden, und aus einem darauf aufgesetzten Abdeckteil.The invention relates to a precision guide for the electrodes of a multi-electrode writing head for metal paper printers, consisting of a guide part with grooves running parallel to one another, the electrodes receiving grooves, from the flanks of which the electrodes are guided laterally, and a cover part placed thereon.

Vielfachelektrodenschreibköpfe für Metallpapierdrucker sind in verschiedensten Ausführungen bekannt. Sie haben u.a. einen bestimmten gegenseitigen Abstand der Elektroden zu gewährleisten und - sofern Abriebprobleme der Elektroden mit zu berücksichtigen sind-eine Möglichkeit vorzusehen, die Elektroden nachführbar zu führen.Multiple electrode print heads for metal paper printers are known in various designs. Among other things, you have to ensure a certain mutual distance between the electrodes and - if abrasion problems of the electrodes are to be taken into account - to provide a way to guide the electrodes.

Bei einer durch die Deutsche Offenlegungsschrift 2541921 bekanntgewordenen Führung der eingangs genannten Art sind die Elektroden des Vielfachelektrodenschreibkopfes in die parallel zueinander verlaufenden Rillen eingeklebt. Ein Nachführen der Elektroden ist bei dieser Führung daher nicht möglich.In the case of a guide of the type mentioned at the beginning, which is known from German Offenlegungsschrift 2541921, the electrodes of the multiple electrode writing head are glued into the grooves running parallel to one another. Tracking the electrodes is therefore not possible with this guide.

Es ist die Aufgabe der Erfindung, eine Präzisionsführung für die Elektroden eines Vielfachlektrodenschreibkopfes für Metallpapierdrucker anzugeben, welche nicht nur ein seitliches Bewegungsspiel der Elektroden in ihren Führungsrillen ausschliesst, sondern auch ein Nachführen der Elektroden zulässt.It is the object of the invention to provide a precision guide for the electrodes of a multiple electrode write head for metal paper printers, which not only excludes a lateral play of the electrodes in their guide grooves, but also allows the electrodes to be tracked.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, dass die Elektroden, im Querschnitt gesehen, nicht über die Rillen vorstehen, dass das Abdeckteil nahe der Austrittsstelle der Elektroden aus dem Schreibkopf eine quer zur Elektrodenlängsachse verlaufende Aussparung aufweist, in der ein elastisch verformbares, nicht leitendes Element angeordnet ist, dessen an dem Führungsteil anliegende Bereiche verformt sind und dass in die Rillen, unter Fixierung der darin befindlichen Elektroden, hineinragt und ein Nachführen der Elektroden in Richtung ihrer Längsachse erlaubt.This object is achieved according to the invention in that the electrodes, seen in cross section, do not protrude beyond the grooves, that the cover part near the point where the electrodes emerge from the write head has a recess which runs transversely to the longitudinal axis of the electrode and in which an elastically deformable, non-conductive Element is arranged, the areas lying on the guide part are deformed and that protrudes into the grooves, fixing the electrodes located therein, and allows the electrodes to be tracked in the direction of their longitudinal axis.

Die erfindungsgemässe Lösung hat den Vorteil, dass die Elektrode, auch wenn deren Durchmesser durch vorgegebene Toleranzen schwanken sollte, in ihrer Lage in der Führungsrille fixiert ist. Sie liegt an den Rillenflanken an und kann seitlich nicht ausweichen. Des weiteren ist es möglich, durch entsprechende Dimensionierung des elastisch verformbaren, nicht leitenden Elementes zu gewährleisten, dass die Elektrode in einem grossen Längsabschnitt der Rillenführung an den Rillenflanken anliegt. Hierzu braucht lediglich das elastisch verformbare Element eine Abmessung in Richtung der Elektrodenlängsachse aufzuweisen, die in der Grössenordnung dieses Längsabschnittes liegt.The solution according to the invention has the advantage that the electrode is fixed in its position in the guide groove, even if its diameter should fluctuate due to predetermined tolerances. It rests on the groove flanks and cannot move sideways. Furthermore, it is possible, by appropriate dimensioning of the elastically deformable, non-conductive element, to ensure that the electrode lies against the groove flanks in a large longitudinal section of the groove guide. For this purpose, only the elastically deformable element needs to have a dimension in the direction of the electrode longitudinal axis which is of the order of magnitude of this longitudinal section.

In der US-Patentschrift 2718450 ist eine Führung beschrieben, bei der in Rillen geführte Elektroden von einer quer zu ihnen liegenden Gummiwalze niedergedrückt werden. Dabei stehen, im Querschnitt gesehen, die oberen Teile der Elektroden jedoch aus den Rillen heraus. Die Gummiwalze hat mit den herausstehenden Teilen der Elektroden einen solchen Reibkontakt, dass sie bei einer Drehung die Elektroden in den Rillen vorschieben kann. Die Elektrode ragt mit ihrem hinteren schreibfernen Ende und mit ihrem schreibnahen Ende aus der Rillenführung heraus. An ihrem hinteren Ende ist eine federnd gelagerte Kontaktkugel zur Herstellung eines elektrischen Kontaktes vorgesehen. Die Federkraft für diese Kugel drückt die Elektrode gegen die Gummiwalze. An ihrem vorderen, schreibnahen Ende liegt die Elektrode tangential auf einem über eine Rolle geführten Aufzeichnungsträger auf. Diese Rolle ist gegen die Elektrode schwenkbar, um einen entsprechenden Kontaktdruck zu erzeugen. Bei weggeschwenkter Rolle ist die Lage der Elektrode in der Rille durch drei Punkte bestimmt: die Vorderkante der Elektrodenführung, die Gummiwalze und die Kontaktkugel. Ein Anliegen der Elektrode an den Rillenflanken entlang der gesamten Rillenlänge ist dadurch nicht gegeben.US Pat. No. 2,718,450 describes a guide in which electrodes guided in grooves are pressed down by a rubber roller lying transversely to them. Seen in cross-section, however, the upper parts of the electrodes stand out of the grooves. The rubber roller has such a frictional contact with the protruding parts of the electrodes that it can advance the electrodes in the grooves upon rotation. The rear end of the electrode protrudes from the groove guide and its end near the write. At its rear end, a spring-loaded contact ball is provided for making an electrical contact. The spring force for this ball presses the electrode against the rubber roller. At its front, near-writing end, the electrode lies tangentially on a record carrier guided over a roll. This roller can be pivoted against the electrode in order to generate a corresponding contact pressure. When the roll is swung away, the position of the electrode in the groove is determined by three points: the front edge of the electrode guide, the rubber roller and the contact ball. This does not result in the electrode resting on the groove flanks along the entire groove length.

Im eingeschwenkten Zustand der Rolle wird zur Erreichung eines Auflagedruckes der Elektrode auf dem Aufzeichnungsträger - wie er für einen gesicherten Aufzeichnungsvorgang erforderlich ist - die Elektrode etwas aus dem vorderen Teil der Rille gegen die Gummiwalze herausgedrückt. Hierdurch ergibt sich die Möglichkeit für ein unerwünschtes seitliches Bewegungsspiel der Elektrode in ihrer Rillenführung.In the swiveled-in state of the roller, in order to achieve a contact pressure of the electrode on the recording medium, as is required for a secure recording process, the electrode is pressed somewhat out of the front part of the groove against the rubber roller. This results in the possibility of an undesirable lateral movement of the electrode in its groove guide.

Ein solches seitliches Bewegungsspiel der Elektrode innerhalb ihrer Führungsrille ist bei der Erfindung vermieden. Es würde, insbesondere bei extrem dünnen Schreibelektroden, deren Durchmesser z. B. in der Grössenordnung von nur einigen hundertstel Millimetern liegt, nachteilige Auswirkungen bedingen: z. B. ein Auswandern des mit der Elektrode erzeugten Bildpunktelementes.Such lateral movement of the electrode within its guide groove is avoided in the invention. It would, especially with extremely thin writing electrodes, the diameter of z. B. is in the order of magnitude of only a few hundredths of a millimeter, cause adverse effects: z. B. emigration of the pixel element generated with the electrode.

Vorteilhafte Weiterbildungen der Erfindung sind den abhängigen Ansprüchen zu entnehmen.Advantageous developments of the invention can be found in the dependent claims.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawings and will be described in more detail below.

Es zeigt:

  • Fig. 1 eine schematische perspektivische Ansicht der Präzisionsführung;
  • Fig. 2 eine vergrösserte teilweise Schnittdarstellung der Präzisionsführung nach Fig. 1 entlang der Schnittlinie XX und
  • Fig. 3 eine vergrösserte Schnittdarstellung der Präzisionsführung entlang der Schnittlinie YY.
It shows:
  • Figure 1 is a schematic perspective view of the precision guide.
  • Fig. 2 is an enlarged partial sectional view of the precision guide of FIG. 1 along the section line XX and
  • Fig. 3 is an enlarged sectional view of the precision guide along the section line YY.

Aus Fig. 1 ist zu ersehen, dass die Präzisionsführung 1 aus drei Hauptteilen besteht: einem Führungsteil 2 einem von einem Deckel gebildeten Abdeckteil 3 und einem in einerAussparung 4 des Abdeckteils 3 verlaufenden flexiblen Element 5. Des weiteren ist aus Fig. 1 zu entnehmen, dass das Führungsteil 2 mit einer Anzahl von nebeneinanderliegenden Führungsrillen 6, in denen die Elektroden 7 verlaufen, versehen ist. Zur übersichtlicheren Darstellung sind einige dieser Führungsrillen ohne zugehörige Elektroden dargestellt. Zur Schreibseite hin sind das Abdeckteil 3 und das Führungsteil 2 mit je einer Abschrägung (8; 9) versehen. Das dadurch entstehende eigentliche Mundstück 10 der Präzisionsführung hat eine dem Schreibvorgang entgegenkommende Ausbildung, d.h., es ist sowohl in Schreibrichtung (Richtung des Doppelpfeiles 11) als auch senkrecht dazu (Richtung des Doppelpfeiles 12) leicht abgerundet, um ein einwandfreies Gleiten zu gewährleisten und ein Festsetzen von Schreibrückständen und Schmutz zu verhindern. Beide Teile, sowohl das Abdeckteil 3 als auch das Führungsteil 2, sind in ihrer äusseren Lage durch entsprechende Anschläge und Auflagen fixiert (nicht gezeichnet). Dabei kann das Abdeckteil 3 durch einfache Feststellschrauben auf dem Führungsteil 2 fixiert werden. Andere Fixier- und Befestigungsmöglichkeiten sind denkbar. Diese Präzisionsführung kann insbesondere bei einer Einrichtung zur Nachführung von Elektroden verwendet werden, wie sie in der Deutschen Patentanmeldung P 2758150.6 beschrieben wurde. Die in den Rillen 6 verlaufenden Elektroden 7 können bei entsprechendem Verschleiss in Richtung des gestrichelt angedeuteten Pfeiles 13 nachgeführt werden. Die Einrichtung zum Nachführen der Elektroden ist nicht Gegenstand der Erfindung, sie wird deshalb auch nicht näher beschrieben. Die Elektroden stehen - im Querschnitt gesehen - mit ihrem Oberteil nicht über die Rillen vor; sie haben grundsätzlich innerhalb der Rille einen seitlichen Bewegungsspielraum. Um die Elektroden 7 in den Rillen in einer fixierten Lage zu halten, sie an die Rillenwandungen zu drücken, ist das als flexibles Halterohr ausgebildete Element 5 vorgesehen, das in einer Aussparung 4 des Abdeckteils 3 verläuft. Diese Aussparung 4 hat eine prismatische Form; sie verläuft quer zur Richtung der Elektroden. Das elastische flexible Halterohr aus elektrisch nichtleitendem Material besteht vorzugsweise aus Polytetrafluoräthylen (PTFE). Dieses Halterohr hat eine derartige Abmessung, dass es bei zusammengebauter Präzisionsführung an den Stellen A, B und C (s. Schnittansicht in Fig. 3) deformiert ist, und zwar in einer solchen Weise, dass der untere Teil des Halterohres (Deformationsbereich C) auf die in der Führungsrille 6 verlaufende Elektrode 7 einwirkt und diese in einer fixierten Lage ohne seitlichen Bewegungsspielraum (Fig. 2) hält. Dadurch wird gewährleistet, dass die Elektroden 7 ohne seitlichen Bewegungsspielraum in den einzelnen Rillen 6 geführt werden.From Fig. 1 it can be seen that the precision guide 1 consists of three main parts: a guide part 2, a cover part 3 formed by a cover and a flexible element 5 running in a recess 4 of the cover part 3. Furthermore, it can be seen from Fig. 1, that the guide part 2 is provided with a number of adjacent guide grooves 6 in which the electrodes 7 run. For the sake of clarity, some of these are guides grooves shown without associated electrodes. On the writing side, the cover part 3 and the guide part 2 are each provided with a bevel (8; 9). The resulting actual mouthpiece 10 of the precision guide has a design that accommodates the writing process, that is, it is slightly rounded both in the writing direction (direction of the double arrow 11) and perpendicularly to it (direction of the double arrow 12) in order to ensure perfect sliding and locking to prevent writing residue and dirt. Both parts, both the cover part 3 and the guide part 2, are fixed in their outer position by appropriate stops and supports (not shown). The cover part 3 can be fixed on the guide part 2 by simple locking screws. Other fixing and fastening options are conceivable. This precision guide can be used in particular in a device for tracking electrodes, as described in German patent application P 2758150.6. The electrodes 7 running in the grooves 6 can be tracked in the direction of the arrow 13 indicated by the dashed line if the wear is corresponding. The device for tracking the electrodes is not the subject of the invention, it is therefore not described in more detail. The cross section of the electrodes does not protrude over the grooves with their upper part; they basically have a lateral range of motion within the groove. In order to keep the electrodes 7 in the grooves in a fixed position, to press them against the groove walls, the element 5 designed as a flexible holding tube is provided, which runs in a recess 4 of the cover part 3. This recess 4 has a prismatic shape; it is transverse to the direction of the electrodes. The elastic flexible holding tube made of electrically non-conductive material is preferably made of polytetrafluoroethylene (PTFE). This holding tube has such a dimension that it is deformed when the precision guide is assembled at points A, B and C (see sectional view in FIG. 3) in such a way that the lower part of the holding tube (deformation area C) is open the electrode 7 running in the guide groove 6 acts and holds it in a fixed position without lateral freedom of movement (FIG. 2). This ensures that the electrodes 7 are guided in the individual grooves 6 without lateral freedom of movement.

Ausserdem hat das vorzugsweise aus PTFE hergestellte flexible Halterohr die Eigenschaft, dass ein Nachführen der Elektroden im zusammengebauten Zustand der Präzisionsführung möglich ist. Als Grund hierfür sei die entsprechende Oberflächeneigenschaft des Halterohres (Gleitreibung) genannt. Führungsteil 2 und Abdeckteil 3 müssen aus verständlichen Gründen aus einem nichtleitenden Material hergestellt sein, damit die einzelnen Elektroden voneinander isoliert bleiben. Vorzugsweise kommt für ein solches Material Keramik in Betracht, jedoch sind auch Lösungen denkbar, bei denen elektrisch leitende Metalle durch entsprechende Oberflächenbehandlung im Bereich ihrer Oberfläche nichtleitend gemacht werden. Fig. 2 zeigt eine vergrösserte teilweise Schnittansicht der Präzisionsführung nach Fig. 1 gemäss Schnittlinie XX. Aus dieser Darstellung ist die Lage der einzelnen Elektroden 7 innerhalb ihrer Führungsrillen 6 zu erkennen. Diese Führungsrillen haben einen einfachen dreiecksförmigen Verlauf. Es ist zu erkennen, wie das als Halterohr ausgebildete Element 5 geringfügig in diese Rillen eingedrückt ist und die Elektroden 7 im oberen Teil berührt und sie dabei in ihrer Lage innerhalb der Rillen fixiert.In addition, the flexible holding tube, which is preferably made of PTFE, has the property that it is possible to track the electrodes in the assembled state of the precision guide. The reason for this is the corresponding surface properties of the holding tube (sliding friction). Guide part 2 and cover part 3 must be made of a non-conductive material for understandable reasons so that the individual electrodes remain isolated from each other. Ceramic is preferably considered for such a material, but solutions are also conceivable in which electrically conductive metals are rendered non-conductive by appropriate surface treatment in the area of their surface. FIG. 2 shows an enlarged partial sectional view of the precision guide according to FIG. 1 according to section line XX. The position of the individual electrodes 7 within their guide grooves 6 can be seen from this illustration. These guide grooves have a simple triangular shape. It can be seen how the element 5 designed as a holding tube is pressed slightly into these grooves and touches the electrodes 7 in the upper part and fixes them in their position within the grooves.

Modelle dieser Präzisionsführungen wurden gebaut und erfolgreich erprobt. Dabei hat sich herausgestellt, dass sie insbesondere bei Metallpapierdruckern hoher Druckauflösung, d. h. für sehr dünne Elektroden, vorteilhaft anzuwenden sind. Nach den vorstehenden Ausführungen muss bei solchen Präzisionsführungen zur Aufrechterhaltung eines exakten gegenseitigen Elektrodenabstandes der Abstand zwischen der Austrittsstelle der Elektroden aus dem Schreibkopf zur Kontaktstelle der Elektroden mit dem Halterohr sehr klein sein. Die Herstellungskosten der beschriebenen Elektrodenführung liegen nur bei einem Bruchteil der für herkömmliche Führungen aufzuwendenden Kosten, und der Aufwand, die einzelnen Elektroden in die Führungen einzufädeln, ist geringer als bei herkömmlichen Schreibköpfen. Der Grund hierfür liegt in der mehrteiligen Bauweise der Präzisionsführung.Models of these precision guides were built and successfully tested. It has been found that they are particularly useful in metal paper printers with high print resolution, i.e. H. for very thin electrodes, are advantageous to use. According to the above statements, in the case of such precision guides in order to maintain an exact mutual electrode spacing, the distance between the exit point of the electrodes from the write head and the contact point of the electrodes with the holding tube must be very small. The manufacturing costs of the electrode guide described are only a fraction of the costs to be expended for conventional guides, and the effort to thread the individual electrodes into the guides is less than with conventional writing heads. The reason for this is the multi-part construction of the precision guide.

Claims (4)

1. Precision quide for the electrodes (7) of a multiple electrode print head for metal paper printers, consisting of a guide part (2) with parallel grooves (6) for the electrodes (7), the electrodes being laterally guided by the walls of said grooves, and by a covering part (3) placed thereon, characterized in that the electrodes (7) seen in cross-section do not protrude over the grooves (6), that the covering part (3) comprises close to the electrode exit from the print head a recess (4) extending transversally to the longitudinal axis of the electrodes, and comprising an elastically deformable, non-conductive element (5) whose regions adjacent to the guide part (2) are deformable, and which protrudes into the grooves (6) fixing the electrodes therein, and which permits an advance of the electrodes in the directions of their longitudinal axis.
2. Guide as claimed in claim 1, characterized in that the deformable element (5) is tubularly shaped.
3. Guide as claimed in claim 2, characterized in that the tubular element (5) consists of PTFE.
4. Guide as claimed in any one of claims 1 to 3, characterized in that the recess (4) has a prismatic cross-section.
EP79102337A 1978-08-09 1979-07-09 Precision guidance for the electrodes of a multi-electrode recording head for metal paper printers Expired EP0008349B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102337T ATE3703T1 (en) 1978-08-09 1979-07-09 PRECISION GUIDE FOR ELECTRODES OF A MULTIPLE ELECTRODE WRITE HEAD FOR METAL PAPER PRINTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2834868 1978-08-09
DE19782834868 DE2834868A1 (en) 1978-08-09 1978-08-09 PRECISION GUIDE FOR ELECTRODES OF A MULTIPLE ELECTRODE WRITING HEAD FROM A METAL PAPER PRINTER

Publications (2)

Publication Number Publication Date
EP0008349A1 EP0008349A1 (en) 1980-03-05
EP0008349B1 true EP0008349B1 (en) 1983-06-08

Family

ID=6046586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102337A Expired EP0008349B1 (en) 1978-08-09 1979-07-09 Precision guidance for the electrodes of a multi-electrode recording head for metal paper printers

Country Status (7)

Country Link
US (1) US4243332A (en)
EP (1) EP0008349B1 (en)
JP (1) JPS6025269B2 (en)
AT (1) ATE3703T1 (en)
CA (1) CA1108930A (en)
DE (2) DE2834868A1 (en)
IT (1) IT1162568B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651418A (en) * 1984-08-29 1987-03-24 At&T Technologies, Inc. Methods of and apparatus for assembling contact elements to connector housing
JPS6157742U (en) * 1984-09-19 1986-04-18

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566358A (en) * 1924-09-05 1925-12-22 Vickerys 1920 Ltd Doctor for paper machines
US3058417A (en) * 1959-05-22 1962-10-16 Nils H V Norlin Mechanism for clamping plates to the cylinders of printing machines
US3187718A (en) * 1962-05-28 1965-06-08 Black Clawson Co Flexible doctor blade coating apparatus
US3715981A (en) * 1970-06-29 1973-02-13 Hamilton Tool Co Fluid actuator and lock for printing plate cylinders
US3826484A (en) * 1972-12-07 1974-07-30 Raycon Corp Workpiece positioning and holding apparatus
US3885859A (en) * 1974-06-24 1975-05-27 Northern Electric Co Optical fibre connectors
JPS543733B2 (en) * 1974-09-20 1979-02-26
US4046454A (en) * 1976-05-18 1977-09-06 Bell Telephone Laboratories, Incorporated Optical fiber connector
US4088312A (en) * 1977-09-27 1978-05-09 Nasa Variable contour securing system

Also Published As

Publication number Publication date
EP0008349A1 (en) 1980-03-05
CA1108930A (en) 1981-09-15
US4243332A (en) 1981-01-06
DE2834868A1 (en) 1980-02-21
ATE3703T1 (en) 1983-06-15
DE2965610D1 (en) 1983-07-14
JPS5525395A (en) 1980-02-23
JPS6025269B2 (en) 1985-06-17
IT1162568B (en) 1987-04-01
IT7924957A0 (en) 1979-08-07

Similar Documents

Publication Publication Date Title
DE3311956A1 (en) COLOR JET PRINTER HEAD
DE3843665A1 (en) MECHANISM FOR HOLDING A LONG, BENDABLE ELEMENT
EP0099120A2 (en) Universal paper feeding device for sheets and webs in line printers
DE2258977A1 (en) TYPE TAPE TYPEWRITER
EP0236773B1 (en) Print head platen distance adjusting device for a printer particularly for a matrix printer
EP0008349B1 (en) Precision guidance for the electrodes of a multi-electrode recording head for metal paper printers
EP0099587A2 (en) Squeegee for screen printing objects
DE2057961C3 (en) Guide device for the printing needles of a mosaic print head
DE2018834B2 (en) Device for electrosensitive recording
DE69101448T2 (en) Device for securing a contact between a record carrier and a guideway in a printer zone of a graphic printer.
DE1773927B1 (en) DEVICE FOR RECORDING RELATIVE MOVEMENTS
DE3018784A1 (en) COLOR DOSING DEVICE IN A COLOR BOX FOR OFFSET OR HIGH PRESSURE MACHINES
DE3933352A1 (en) SYNTHETIC RESIN PEN
DE2253470A1 (en) PRINTER HEAD ASSEMBLY FOR DOT MATRIX HIGH SPEED PRINTER
DE2129400A1 (en) Writing device
DE3527453A1 (en) DEVICE FOR SUPPLYING A NEEDLE POINT WRITING HEAD WITH INK
EP0178342B1 (en) Device for a matrix printer, in particular a matrix line printer
DE1773927C (en) Device for recording relative movements
DE2824621A1 (en) Office machine printing head clearance adjusting mechanism - has magnetic fixing device holding head during typing programme
DE1911950A1 (en) Tube recorder tip with compensation chamber
AT227732B (en) Device for straight guidance of a movable organ
EP0022924A1 (en) Ink metering device for a printing machine
DE2458761C3 (en) Paper holding plate arranged in front of a recording medium support
DE2337632C3 (en) Magnetic head assembly for an information transmission device
DE2026790C3 (en) Electrographic writing device

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

Designated state(s): AT DE FR GB

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT DE FR GB

REF Corresponds to:

Ref document number: 3703

Country of ref document: AT

Date of ref document: 19830615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2965610

Country of ref document: DE

Date of ref document: 19830714

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890628

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890630

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19890731

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890805

Year of fee payment: 11

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

Ref country code: GB

Effective date: 19900709

Ref country code: AT

Effective date: 19900709

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910329

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

Ref country code: DE

Effective date: 19910403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST