EP0388684A2 - Thermal print head - Google Patents

Thermal print head Download PDF

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Publication number
EP0388684A2
EP0388684A2 EP90104073A EP90104073A EP0388684A2 EP 0388684 A2 EP0388684 A2 EP 0388684A2 EP 90104073 A EP90104073 A EP 90104073A EP 90104073 A EP90104073 A EP 90104073A EP 0388684 A2 EP0388684 A2 EP 0388684A2
Authority
EP
European Patent Office
Prior art keywords
thermal printing
printing plate
line
thermal
holding frame
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
EP90104073A
Other languages
German (de)
French (fr)
Other versions
EP0388684B1 (en
EP0388684A3 (en
Inventor
Ulf Koch
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.)
Meto International GmbH
Original Assignee
Esselte Meto International GmbH
Esselte Meto International Produktions GmbH
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.)
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Publication date
Application filed by Esselte Meto International GmbH, Esselte Meto International Produktions GmbH filed Critical Esselte Meto International GmbH
Publication of EP0388684A2 publication Critical patent/EP0388684A2/en
Publication of EP0388684A3 publication Critical patent/EP0388684A3/en
Application granted granted Critical
Publication of EP0388684B1 publication Critical patent/EP0388684B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/34—Bodily-changeable print heads or carriages

Definitions

  • the invention relates to a thermal printhead with a holding frame, a thermal printing plate which has a plurality of individually controllable heating elements arranged along a line on a front side, and a counter-pressure roller rotatably mounted in the holding frame, against which the thermal printing plate is held in a force-fitting manner in such a way that the line of the heating elements touches the circumferential surface of the counter-pressure roller along an axially parallel surface line.
  • thermal print head is known from EP-A-0 191 493.
  • a thermal print board is mounted in a holding frame so as to be pivotable about an axis.
  • a spring holds the thermal printing plate in contact with a counter-pressure roller, the thermal printing plate being aligned with respect to this counter-pressure roller so that the line of the heating elements is identical to the line on which the thermal printing plate touches the counter-pressure roller.
  • the spring lies exactly in the known thermal print head Plane that runs through the axis of the counter-pressure roller and the line of contact between the thermal printing plate and the outer surface of the counter-pressure roller.
  • the thermal printing plate Due to this special arrangement of the spring, it generates a pure torque around the bearing axis of the thermal printing plate; Lateral forces on the bearing axis are not generated.
  • the thermal printing plate has a closed eyelet through which the bearing axis extends. Since the mode of operation of such a thermal printhead is known to the person skilled in the art, it is sufficient to point out here that the printing on the heat-sensitive paper takes place by moving it between the counterpressure roller and the thermal printing plate biased by the spring in the direction of the thermal printing roller, while the heating elements of the Thermal printing board can be selectively heated depending on the data to be printed by supplying electricity, the data supply being synchronized with the feed rate of the paper.
  • the thermal printing plate Due to the fastening of the thermal printing plate in the housing of the printhead by means of a closed eyelet and a bearing axis, the thermal printing plate can be pivoted about the bearing axis, but cannot be removed from the printhead without the bearing axis being pulled out.
  • the removal of bearing axles cannot be expected of every user, but it is usually reserved for maintenance personnel to carry out such operations. Therefore, the user cannot easily clean a dirty thermal printhead or remove paper that may be stuck.
  • the invention has for its object to provide a thermal print head of the type described, which allows a very easy removal of the thermal print board due to its structure.
  • this object is achieved in that at least one latching hook, which engages with a pin fastened to the holding frame, is attached to the thermal printing board at a location which is at a distance from the line of the heating elements, that in the region between the at least one latching hook and the Line of heating elements at least one compression spring between a stop firmly connected to the holding frame and the back of the thermal printing plate facing away from the front of the thermal printing plate is attached, and that the at least one compression spring is assigned a holding device which holds the compression spring on the thermal printing plate.
  • the thermal print board is held in the holding frame by means of at least one latching hook, which makes it possible to pull the thermal print board out of the holding frame simply by exerting a tensile force on the thermal printing board and thus also on the latching hook connected to it.
  • the locking hook slips under the action of the tensile force over the pin, so that the thermal printing plate is no longer fixed to the holding frame.
  • a secure hold in the holding frame is not only achieved by a suitable design of the locking hook, but also by the fact that the force-fitting contact of the thermal printing plate on the counter-pressure roller in addition to the torque around the pin encompassed by the locking hook also generates a transverse force which Presses the locking hook against the pin, so that an easy release of the locking hook from the pin is counteracted.
  • the holding device assigned to the spring ensures that the spring is not lost when the thermal printing plate is pulled out of the holding frame, but is held on the thermal printing plate.
  • thermal print head according to the invention is simple in construction and can therefore be produced inexpensively. This also makes it more reliable and easy to maintain elevated.
  • the thermal print head 10 shown in a top view in FIG. 1 and in section in FIG. 2 has a holding frame which contains two side plates 12 and 14.
  • the side plates 12 and 14 are connected to one another by a plurality of axes 16, 18, 20, 22.
  • an axis 24 is rotatably mounted in the two side plates, which carries a counter-pressure roller 26.
  • a thermal printing plate 28 is mounted in the holding frame, which carries a larger number of heating elements along a line 30 near its end on the left in FIG. 2 on a ceramic substrate.
  • Integrated circuits (not shown) are also attached to the ceramic substrate and are used to control the heating elements.
  • Printed connecting lines lead from the integrated circuits on the one hand to the heating elements and on the other hand to a connecting plug 32 which can be seen in FIG. 1 at the right end of the thermal printing board 28 and to which a book, not shown, is seated at the end of a cable se can be connected.
  • a heat sink 34 contained in the thermoplate 28 is used to dissipate excess heat.
  • a sheet metal 36 is fastened on the heat sink 34 and is provided with a latching hook 38, 40 in the area of the side plates 12, 14.
  • the latching hook 38 engages from above via an axis 42 which extends between the side plates 12 and 14.
  • the locking hook 40 also engages over this axis 42.
  • FIG. 3 From the sheet 36, two pins 44, 46 can be seen in FIG. 3, on which a holding device is slidably mounted, which has two plates 50, 52 connected by a web 48. Between the plates 50 and 52 and the sheet 36 there is a compression spring 54 and 56, respectively.
  • the springs 54 and 56 press the holding device with the web 48 and the plates 50, 52 as far away from the sheet metal 36 as two snap rings 58 and 60 attached to the pins 44, 46 allow.
  • stops 62 and 64 are attached, which, as shown in FIG. 1, reach over the plates 50, 52 and engage with the upper sides of these plates.
  • the distance between the sheet 36 and the stops 62, 64 is such that it is smaller than the distance that the holding device with the web 48 and the plates 50, 52 cover until the web 48 is applied to the locking rings 58, 60 can.
  • the compression springs 54, 56 Due to the arrangement of the compression springs 54, 56 in the area between the axis 42 and the line of contact between the thermal printing board 28 and the counter-pressure roller 26, the compression springs 54, 56 not only generate the force with which the thermal printing plate is held in contact with the counter-pressure roller 26, but they also generate a locking force between the locking hooks 38, 40 and the axis 42, which is easy to release the thermal printing board 28 prevented from the axis 42.
  • the generation of this transverse force on the axis 42 is important because when the thermal print head is operated on the thermal print plate 28, a tensile force is exerted to the left in FIG. 2, which releases the latching hooks 38, 40 from the axis 42 without generating the transverse force this axis 42 could result.
  • the aforementioned tensile force comes about as follows:
  • the dash-dotted line 66 shown in FIG. 2 indicates the path of the heat-sensitive paper to be printed through the thermal print head 10.
  • the counter-pressure roller 26 is rotated counterclockwise by means of a drive device, not shown, acting on the axis 24.
  • the paper is transported along the line 30 of the heating elements of the thermal printing board 28 by moving forward in the direction of the arrow shown in FIG. 2, so that the desired data due to the selective heating of the paper and the resulting blackening by appropriate electrical control of the individual heating elements can be generated.
  • a frictional force is also exerted on the thermal printing plate 28, which has the aforementioned tractive force to the left.
  • the release of the locking hooks 38, 40 from the axis 42 is prevented by the aforementioned transverse force, which is generated by the compression springs 54, 56.
  • the locking hooks 38, 40 do not necessarily have to cooperate with an axis extending between the two side plates 12 and 14; it is also easily possible to have one on each side plate Attach protruding pin that the locking hooks 38, 40 could overlap as shown in Fig. 2.
  • the provision of the axle 42 contributes to further stiffening and thus to increasing the stability of the holding frame.
  • a guide plate 68 which is fastened to the side plates 12 and 14, serves for the clean feeding of the recording medium.
  • FIG. 4 shows the basic arrangement of the thermal printing plate 28 relative to the counter-pressure roller 26 and to the axis 42.
  • the compressive forces generated by the compression springs 54, 56 are indicated by arrows.
  • the open design of the latching hooks 38, 40 and the provision of the holding device for the compression springs 54, 56 make it possible to pull the thermal printing plate 28 out of the holding frame without further ado.
  • the thermal printing plate 28 is provided with an extendable handle element 70 which has two elongated holes 72, 74, so that it can be shifted to the left in the illustration of FIGS. 1 and 2. This enables a better grip on the grip element 70 when the thermal printing board 28 is to be pulled out of the holding frame.
  • the plates 50, 52 of the holding device and the compression springs 54, 56 are provided with ends which are angled with respect to the removal direction of the thermal printing plate 28, the thermal printing plate 28 can easily be pushed back into the holding frame, since these angled ends act like chamfers.
  • the thermal print head described is very easy to use and maintain due to the fact that the thermal print board can be removed; in particular, the area in which the actual printing process takes place and in which soiling is caused by abrasion can be cleaned well.

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  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)

Abstract

Beschrieben wird ein Thermodruckkopf (10) mit einem Halterahmen (12, 14, 16, 18, 20, 22) und einer Thermodruckplatine (28). Auf der Vorderseite der Thermodruckplatine (28) sind längs einer Linie mehrere, einzeln ansteuerbare Heizelemente angebracht. Die Thermodruckplatine (28) ist kraftschlüssig in Anlage an eine in dem Halterahmen drehbar gelagerte Gegendruckwalze (26) gehalten. Die Linie der Heizelemente berührt dabei die Gegendruckwalze längs einer achsparallelen Mantellinie. An der Thermodruckplatine (28) ist im Abstand von der Linie der Heizelemente wenigstens ein mit einem am Halterahmen befestigten Stift in Eingriff stehender Rasthaken (38, 40) angebracht. Im Bereich zwischen dem wenigstens einen Rasthaken (38, 40) und der Linie der Heizelemente ist wenigstens eine Druckfeder (54, 56) zwischen einem fest mit dem Halterahmen verbundenen Anschlag (62, 64) und der Rückseite der Thermodruckplatine (28) angebracht. Die wenigstens eine Druckfeder (54, 56) ist mittels einer Haltevorrichtung (50, 52, 48) an der Thermodruckplatine (28) festgehalten.A thermal print head (10) with a holding frame (12, 14, 16, 18, 20, 22) and a thermal print circuit board (28) is described. On the front of the thermal printing board (28), several individually controllable heating elements are attached along a line. The thermal printing plate (28) is held non-positively in contact with a counter-pressure roller (26) rotatably mounted in the holding frame. The line of heating elements touches the counter-pressure roller along an axis-parallel surface line. At least one latching hook (38, 40), which engages with a pin fastened to the holding frame, is attached to the thermal printing board (28) at a distance from the line of the heating elements. In the area between the at least one latching hook (38, 40) and the line of the heating elements, at least one compression spring (54, 56) is attached between a stop (62, 64) fixedly connected to the holding frame and the back of the thermal printing plate (28). The at least one compression spring (54, 56) is held on the thermal printing plate (28) by means of a holding device (50, 52, 48).

Description

Die Erfindung bezieht sich auf einen Thermodruckkopf mit einem Halterahmen, einer Thermodruckplatine, die auf einer Vorderseite mehrere längs einer Linie angeordnete, einzeln ansteuerbare Heizelemente aufweist, und einer in dem Halte­rahmen drehbar gelagerten Gegendruckwalze, gegen die die Thermodruckplatine kraftschlüssig so in Anlage gehalten ist, daß die Linie der Heizelemente die Umfangsfläche der Gegen­druckwalze längs einer achsparallelen Mantellinie berührt.The invention relates to a thermal printhead with a holding frame, a thermal printing plate which has a plurality of individually controllable heating elements arranged along a line on a front side, and a counter-pressure roller rotatably mounted in the holding frame, against which the thermal printing plate is held in a force-fitting manner in such a way that the line of the heating elements touches the circumferential surface of the counter-pressure roller along an axially parallel surface line.

Ein solcher Thermodruckkopf ist aus der EP-A-0 191 493 be­kannt. Bei diesem bekannten Thermodruckkopf ist eine Thermo­druckplatine in einem Halterahmen um eine Achse schwenkbar gelagert. Eine Feder hält die Thermodruckplatine in Anlage an eine Gegendruckwalze, wobei die Thermodruckplatine bezüg­lich dieser Gegendruckwalze so ausgerichtet ist, daß die Linie der Heizelemente mit der Linie identisch ist, an der die Thermodruckplatine die Gegendruckwalze berührt. Die Fe­der liegt bei dem bekannten Thermodruckkopf genau in der Ebene, die durch die Achse der Gegendruckwalze und die Be­rührungslinie zwischen der Thermodruckplatine und der Man­telfläche der Gegendruckwalze verläuft. Aufgrund dieser spe­ziellen Anordnung der Feder erzeugt diese ein reines Dreh­moment um die Lagerachse der Thermodruckplatine; Querkräfte auf die Lagerachse werden nicht erzeugt. Als Lagerelement weist die Thermodruckplatine eine geschlossene Öse auf, durch die sich die Lagerachse erstreckt. Da die Wirkungs­weise eines solchen Thermodruckkopfs dem Fachmann bekannt ist, genügt es hier, darauf hinzuweisen, daß das Bedrucken des wärmeempfindlichen Papiers dadurch erfolgt, daß es zwi­schen der Gegendruckwalze und der von der Feder in Richtung zur Thermodruckwalze vorgespannten Thermodruckplatine hin­durchbewegt wird, während die Heizelemente der Thermodruck­platine in selektiver Weise in Abhängigkeit von den jeweils zu druckenden Daten durch Zuführung von Strom erhitzt wer­den, wobei die Datenzufuhr mit der Vorschubgeschwindigkeit des Papiers synchronisiert ist.Such a thermal print head is known from EP-A-0 191 493. In this known thermal print head, a thermal print board is mounted in a holding frame so as to be pivotable about an axis. A spring holds the thermal printing plate in contact with a counter-pressure roller, the thermal printing plate being aligned with respect to this counter-pressure roller so that the line of the heating elements is identical to the line on which the thermal printing plate touches the counter-pressure roller. The spring lies exactly in the known thermal print head Plane that runs through the axis of the counter-pressure roller and the line of contact between the thermal printing plate and the outer surface of the counter-pressure roller. Due to this special arrangement of the spring, it generates a pure torque around the bearing axis of the thermal printing plate; Lateral forces on the bearing axis are not generated. As a bearing element, the thermal printing plate has a closed eyelet through which the bearing axis extends. Since the mode of operation of such a thermal printhead is known to the person skilled in the art, it is sufficient to point out here that the printing on the heat-sensitive paper takes place by moving it between the counterpressure roller and the thermal printing plate biased by the spring in the direction of the thermal printing roller, while the heating elements of the Thermal printing board can be selectively heated depending on the data to be printed by supplying electricity, the data supply being synchronized with the feed rate of the paper.

Aufgrund der Befestigung der Thermodruckplatine im Gehäuse des Druckkopfs mittels einer geschlossenen Öse und einer Lagerachse kann die Thermodruckplatine zwar um die Lagerach­se geschwenkt werden, jedoch nicht aus dem Druckkopf heraus­genommen werden, ohne daß die Lagerachse herausgezogen wird. Das Entfernen von Lagerachsen kann aber nicht jedem Benutzer zugemutet werden, sondern es bleibt in der Regel dem War­tungspersonal vorbehalten, solche Handgriffe auszuführen. Der Benutzer kann daher nicht ohne weiteres einen verschmutz­ten Thermodruckkopf reinigen oder aus ihm möglicherweise hängengebliebenes Papier entfernen.Due to the fastening of the thermal printing plate in the housing of the printhead by means of a closed eyelet and a bearing axis, the thermal printing plate can be pivoted about the bearing axis, but cannot be removed from the printhead without the bearing axis being pulled out. However, the removal of bearing axles cannot be expected of every user, but it is usually reserved for maintenance personnel to carry out such operations. Therefore, the user cannot easily clean a dirty thermal printhead or remove paper that may be stuck.

Der Erfindung liegt die Aufgabe zugrunde, einen Thermodruck­kopf der geschilderten Art zu schaffen, der aufgrund seines Aufbaus eine sehr einfache Entnahme der Thermodruckplatine ermöglicht.The invention has for its object to provide a thermal print head of the type described, which allows a very easy removal of the thermal print board due to its structure.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß an der Thermodruckplatine wenigstens ein mit einem an dem Hal­terahmen befestigten Stift in Eingriff stehender Rasthaken an einer Stelle angebracht ist, die im Abstand von der Linie der Heizelemente liegt, daß im Bereich zwischen dem wenig­stens einen Rasthaken und der Linie der Heizelemente wenig­stens eine Druckfeder zwischen einem fest mit dem Halterah­men verbundenen Anschlag und der von der Vorderseite der Thermodruckplatine abgewandten Rückseite der Thermodruck­platine angebracht ist, und daß der wenigstens einen Druck­feder eine Haltevorrichtung zugeordnet ist, die die Druck­feder an der Thermodruckplatine festhält.According to the invention, this object is achieved in that at least one latching hook, which engages with a pin fastened to the holding frame, is attached to the thermal printing board at a location which is at a distance from the line of the heating elements, that in the region between the at least one latching hook and the Line of heating elements at least one compression spring between a stop firmly connected to the holding frame and the back of the thermal printing plate facing away from the front of the thermal printing plate is attached, and that the at least one compression spring is assigned a holding device which holds the compression spring on the thermal printing plate.

Beim erfindungsgemäßen Thermodruckkopf wird die Thermodruck­platine mittels wenigstens eines Rasthakens im Halterahmen festgehalten, was ermöglicht, die Thermodruckplatine einfach durch Ausüben einer Zugkraft auf die Thermodruckplatine und damit auch auf den mit ihr verbundenen Rasthaken aus dem Halterahmen herauszuziehen. Der Rasthaken rutscht dabei un­ter der Einwirkung der Zugkraft über den Stift hinweg, so daß die Thermodruckplatine nicht mehr am Halterahmen fixiert ist. Ein sicheres Festhalten im Halterahmen wird dabei nicht nur durch eine geeignete Ausgestaltung des Rasthakens er­reicht, sondern auch dadurch, daß die die kraftschlüssige Anlage der Thermodruckplatine an der Gegendruckwalze bewir­kende Feder zusätzlich zu dem Drehmoment um den vom Rastha­ken umfaßten Stift auch eine Querkraft erzeugt, die den Rast­haken gegen den Stift drückt, so daß einem leichten Lösen des Rasthakens von dem Stift entgegengewirkt wird. Die der Feder zugeordnete Haltevorrichtung sorgt dafür, daß die Fe­der beim Herausziehen der Thermodruckplatine aus dem Halte­rahmen nicht verlorengeht, sondern an der Thermodruckplatine festgehalten wird.In the thermal print head according to the invention, the thermal print board is held in the holding frame by means of at least one latching hook, which makes it possible to pull the thermal print board out of the holding frame simply by exerting a tensile force on the thermal printing board and thus also on the latching hook connected to it. The locking hook slips under the action of the tensile force over the pin, so that the thermal printing plate is no longer fixed to the holding frame. A secure hold in the holding frame is not only achieved by a suitable design of the locking hook, but also by the fact that the force-fitting contact of the thermal printing plate on the counter-pressure roller in addition to the torque around the pin encompassed by the locking hook also generates a transverse force which Presses the locking hook against the pin, so that an easy release of the locking hook from the pin is counteracted. The holding device assigned to the spring ensures that the spring is not lost when the thermal printing plate is pulled out of the holding frame, but is held on the thermal printing plate.

Zudem ist der erfindungsgemäße Thermodruckkopf einfach auf­gebaut und somit preisgünstig herstellbar. Auch dessen Be­triebssicherheit und Wartungsfreundlichkeit werden dadurch erhöht.In addition, the thermal print head according to the invention is simple in construction and can therefore be produced inexpensively. This also makes it more reliable and easy to maintain elevated.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unter­ansprüchen gekennzeichnet.Advantageous developments of the invention are characterized in the subclaims.

Die Erfindung wird nun anhand der Zeichnung beispielshalber erläutert. Es zeigen:

  • Fig. 1 eine Draufsicht auf den erfindungsgemäßen Thermo­druckkopf,
  • Fig. 2 einen Schnitt längs der Linie A-A von Fig. 1,
  • Fig. 3 eine Ansicht der Thermodruckplatine ohne Halte­rahmen bei Betrachtung in Fig. 1 von rechts,
  • Fig. 4 eine schematisch vereinfachte Darstellung zur Erläuterung des der Erfindung zugrunde liegenden Prinzips.
The invention will now be explained by way of example with reference to the drawing. Show it:
  • 1 is a plan view of the thermal print head according to the invention,
  • 2 shows a section along the line AA of FIG. 1,
  • 3 is a view of the thermal printing board without a holding frame when viewed in FIG. 1 from the right,
  • Fig. 4 is a schematically simplified representation to explain the principle underlying the invention.

Der in Fig. 1 in einer Draufsicht und in Fig. 2 im Schnitt dargestellte Thermodruckkopf 10 weist einen Halterahmen auf, der zwei Seitenplatten 12 und 14 enthält. Die Seitenplatten 12 und 14 sind durch mehrere Achsen 16, 18, 20, 22 miteinan­der verbunden. Außerdem ist in den beiden Seitenplatten eine Achse 24 drehbar gelagert, die eine Gegendruckwalze 26 trägt. Zwischen den Seitenplatten 12 und 14 ist in dem Halterahmen eine Thermodruckplatine 28 angebracht, die nahe ihres in Fig. 2 links liegenden Endes auf einem Keramiksubstrat längs einer Linie 30 eine größere Anzahl von Heizelementen trägt. Auf dem Keramiksubstrat sind auch nicht dargestellte inte­grierte Schaltungen angebracht, die der Ansteuerung der Heiz­elemente dienen. Gedruckte Verbindungsleitungen führen von den integrierten Schaltungen einerseits zu den Heizelementen und andererseits zu einem in Fig. 1 am rechten Ende der Ther­modruckplatine 28 erkennbaren Verbindungsstecker 32, an den eine am Ende eines Kabels sitzende, nicht dargestellte Buch­ se angeschlossen werden kann. Ein in der Thermoplatine 28 enthaltener Kühlkörper 34 dient der Ableitung überschüssiger Wärme. Auf dem Kühlkörper 34 ist ein Blech 36 befestigt, das im Bereich der Seitenplatten 12, 14 jeweils mit einem Rast­haken 38, 40 versehen ist. Wie Fig. 2 erkennen läßt, greift der Rasthaken 38 von oben her über eine Achse 42, die sich zwischen den Seitenplatten 12 und 14 erstreckt. In gleicher Weise greift auch der Rasthaken 40 über diese Achse 42.The thermal print head 10 shown in a top view in FIG. 1 and in section in FIG. 2 has a holding frame which contains two side plates 12 and 14. The side plates 12 and 14 are connected to one another by a plurality of axes 16, 18, 20, 22. In addition, an axis 24 is rotatably mounted in the two side plates, which carries a counter-pressure roller 26. Between the side plates 12 and 14, a thermal printing plate 28 is mounted in the holding frame, which carries a larger number of heating elements along a line 30 near its end on the left in FIG. 2 on a ceramic substrate. Integrated circuits (not shown) are also attached to the ceramic substrate and are used to control the heating elements. Printed connecting lines lead from the integrated circuits on the one hand to the heating elements and on the other hand to a connecting plug 32 which can be seen in FIG. 1 at the right end of the thermal printing board 28 and to which a book, not shown, is seated at the end of a cable se can be connected. A heat sink 34 contained in the thermoplate 28 is used to dissipate excess heat. A sheet metal 36 is fastened on the heat sink 34 and is provided with a latching hook 38, 40 in the area of the side plates 12, 14. As can be seen in FIG. 2, the latching hook 38 engages from above via an axis 42 which extends between the side plates 12 and 14. In the same way, the locking hook 40 also engages over this axis 42.

Von dem Blech 36 stehen zwei in Fig. 3 erkennbare Stifte 44, 46 nach oben, auf denen eine Haltevorrichtung verschiebbar angebracht ist, die zwei durch einen Steg 48 verbundene Plat­ten 50, 52 aufweist. Zwischen den Platten 50 und 52 und dem Blech 36 befindet sich jeweils eine Druckfeder 54 bzw. 56.From the sheet 36, two pins 44, 46 can be seen in FIG. 3, on which a holding device is slidably mounted, which has two plates 50, 52 connected by a web 48. Between the plates 50 and 52 and the sheet 36 there is a compression spring 54 and 56, respectively.

Wie Fig. 3 zeigt, drücken die Federn 54 und 56 die Haltevor­richtung mit dem Steg 48 und den Platten 50, 52 so weit vom Blech 36 weg, wie dies zwei auf den Stiften 44, 46 ange­brachte Sicherungsringe 58 bzw. 60 zulassen.As shown in FIG. 3, the springs 54 and 56 press the holding device with the web 48 and the plates 50, 52 as far away from the sheet metal 36 as two snap rings 58 and 60 attached to the pins 44, 46 allow.

An den Seitenplatten 12 und 14 sind Anschläge 62 bzw. 64 an­gebracht, die gemäß Fig. 1 über die Platten 50, 52 hinweg­greifen und mit den Oberseiten dieser Platten in Eingriff stehen. Der Abstand zwischen dem Blech 36 und den Anschlägen 62, 64 ist so bemessen, daß er kleiner als der Weg ist, den die Haltevorrichtung mit dem Steg 48 und den Platten 50, 52 bis zum Anlegen des Stegs 48 an den Sicherungsringen 58, 60 zurücklegen kann. Dies bedeutet, daß bei der Anordnung der Einzelkomponenten gemäß Fig. 2 aufgrund der Zusammenwirkung der Anschläge 62, 64 mit den Platten 50 bzw. 52 die Druck­federn 54, 56 zusammengedrückt sind und eine Druckkraft aus­üben, die die Thermodruckplatine 28 in der Darstellung Von Fig. 2 nach unten belastet. Die Thermodruckplatine 28 wird daher von der Feder längs der Linie 30 der Heizelemente in Anlage an die Gegendruckwalze 26 gehalten. Aufgrund der An­ordnung der Druckfedern 54, 56 im Bereich zwischen der Achse 42 und der Berührungslinie zwischen der Thermodruckplatine 28 und der Gegendruckwalze 26 erzeugen die Druckfedern 54, 56 nicht nur die Kraft, mit der die Thermodruckplatine in Anlage an die Gegendruckwalze 26 gehalten wird, sondern sie erzeugen zwischen den Rasthaken 38, 40 und der Achse 42 auch eine Rastkraft, die ein leichtes Lösen der Thermodruckpla­tine 28 von der Achse 42 verhindert. Das Erzeugen dieser Querkraft auf die Achse 42 ist deshalb wichtig, weil beim Betrieb des Thermodruckkopfs auf die Thermodruckplatine 28 eine in Fig. 2 nach links gerichtete Zugkraft ausgeübt wird, die ohne Erzeugen der Querkraft auf die Achse 42 ein Lösen der Rasthaken 38, 40 von dieser Achse 42 zur Folge haben könnte.On the side plates 12 and 14, stops 62 and 64 are attached, which, as shown in FIG. 1, reach over the plates 50, 52 and engage with the upper sides of these plates. The distance between the sheet 36 and the stops 62, 64 is such that it is smaller than the distance that the holding device with the web 48 and the plates 50, 52 cover until the web 48 is applied to the locking rings 58, 60 can. This means that in the arrangement of the individual components according to FIG. 2, due to the interaction of the stops 62, 64 with the plates 50 and 52, the compression springs 54, 56 are compressed and exert a compressive force which the thermal printing plate 28 in the representation from FIG. 2 charged down. The thermal printing plate 28 is therefore held by the spring along the line 30 of the heating elements in contact with the counter-pressure roller 26. Due to the arrangement of the compression springs 54, 56 in the area between the axis 42 and the line of contact between the thermal printing board 28 and the counter-pressure roller 26, the compression springs 54, 56 not only generate the force with which the thermal printing plate is held in contact with the counter-pressure roller 26, but they also generate a locking force between the locking hooks 38, 40 and the axis 42, which is easy to release the thermal printing board 28 prevented from the axis 42. The generation of this transverse force on the axis 42 is important because when the thermal print head is operated on the thermal print plate 28, a tensile force is exerted to the left in FIG. 2, which releases the latching hooks 38, 40 from the axis 42 without generating the transverse force this axis 42 could result.

Die erwähnte Zugkraft kommt wie folgt zustande: Die in Fig. 2 erkennbare strichpunktierte Linie 66 gibt den Weg des zu be­druckenden wärmeempfindlichen Papiers durch den Thermodruck­kopf 10 an. Bei der Durchführung eines Druckvorgangs wird die Gegendruckwalze 26 mittels einer auf die Achse 24 ein­wirkenden, nicht dargestellten Antriebsvorrichtung entgegen dem Uhrzeigersinn gedreht. Durch Reibmitnahme wird das Pa­pier an der Linie 30 der Heizelemente der Thermodruckplatine 28 durch Vorwärtsbewegen in Richtung des in Fig. 2 angegebe­nen Pfeils vorbeitransportiert, so daß durch eine entspre­chende elektrische Ansteuerung der einzelnen Heizelemente die gewünschten Daten aufgrund der selektiven Erwärmung des Papiers und der resultierenden Schwärzung erzeugt werden können. Bei dieser Transportbewegung des Papiers wird auch auf die Thermodruckplatine 28 eine Reibkraft ausgeübt, die die erwähnte Zugkraft nach links zur Folge hat. Das Lösen der Rasthaken 38, 40 von der Achse 42 wird durch die erwähn­te Querkraft verhindert, die durch die Druckfedern 54, 56 erzeugt wird.The aforementioned tensile force comes about as follows: The dash-dotted line 66 shown in FIG. 2 indicates the path of the heat-sensitive paper to be printed through the thermal print head 10. When a printing process is carried out, the counter-pressure roller 26 is rotated counterclockwise by means of a drive device, not shown, acting on the axis 24. By friction, the paper is transported along the line 30 of the heating elements of the thermal printing board 28 by moving forward in the direction of the arrow shown in FIG. 2, so that the desired data due to the selective heating of the paper and the resulting blackening by appropriate electrical control of the individual heating elements can be generated. During this transport movement of the paper, a frictional force is also exerted on the thermal printing plate 28, which has the aforementioned tractive force to the left. The release of the locking hooks 38, 40 from the axis 42 is prevented by the aforementioned transverse force, which is generated by the compression springs 54, 56.

Es ist zu erkennen, daß die Rasthaken 38, 40 nicht unbedingt mit einer sich zwischen den beiden Seitenplatten 12 und 14 erstreckenden Achse zusammenwirken müssen; es ist ohne wei­teres auch möglich, an jeder Seitenplatte einen nach innen vorstehenden Stift anzubringen, den die Rasthaken 38, 40 so übergreifen könnten, wie in Fig. 2 dargestellt ist. Das Vor­sehen der Achse 42 trägt jedoch zu einer weiteren Verstei­fung und somit zur Erhöhung der Stabilität des Halterahmens bei.It can be seen that the locking hooks 38, 40 do not necessarily have to cooperate with an axis extending between the two side plates 12 and 14; it is also easily possible to have one on each side plate Attach protruding pin that the locking hooks 38, 40 could overlap as shown in Fig. 2. The provision of the axle 42, however, contributes to further stiffening and thus to increasing the stability of the holding frame.

Dem sauberen Zuführen des Aufzeichnungsträgers dient ein Führungsblech 68, das an den Seitenplatten 12 und 14 befe­stigt ist.A guide plate 68, which is fastened to the side plates 12 and 14, serves for the clean feeding of the recording medium.

In der schematischen Darstellung von Fig. 4 ist die prinzi­pielle Anordnung der Thermodruckplatine 28 relativ zur Ge­gendruckwalze 26 und zur Achse 42 dargestellt. Mit Pfeilen sind dabei die von den Druckfedern 54, 56 erzeugten Druck­kräfte angegeben.The schematic arrangement of FIG. 4 shows the basic arrangement of the thermal printing plate 28 relative to the counter-pressure roller 26 and to the axis 42. The compressive forces generated by the compression springs 54, 56 are indicated by arrows.

Die offene Ausbildung der Rasthaken 38, 40 und das Vorsehen der Haltevorrichtung für die Druckfedern 54, 56 ermöglicht es, die Thermodruckplatine 28 ohne weiteres aus dem Halte­rahmen herauszuziehen. Die Thermodruckplatine 28 ist mit einem ausschiebbaren Griffelement 70 versehen, das zwei Langlöcher 72, 74 aufweist, so daß es in der Darstellung von Fig. 1 und 2 nach links verschoben werden kann. Dies ermög­licht ein besseres Anfassen des Griffelements 70, wenn die Thermodruckplatine 28 aus dem Halterahmen herausgezogen wer­den soll. Beim Ausüben einer Zugkraft auf das Griffelement 70 wird dies zunächst bis zum Anschlagen der Langlöcher 72, 74 an Trägerstiften 76, 78 nach links verschoben, und es wird dann eine Zugkraft auf die Thermodruckplatine 28 aus­geübt, die groß genug ist, um die von den Druckfedern 54, 56 über die Rasthaken 38, 40 auf die Achse 42 ausgeübte Quer­kraft zu überwinden. Die Rasthaken 38, 40 rutschen daher un­ter weiterem Zusammendrücken der Federn 54, 56 über die Ach­se 42 hinweg, so daß die Thermodruckplatine 28 nach links aus dem Halterahmen herausgezogen werden kann. Die Druckfe­dern 54, 56 werden dabei von der Haltevorrichtung 48, 50, 52 festgehalten, so daß sie nicht verlorengehen können. Im her­ ausgezogenen Zustand kann die Thermodruckplatine leicht ge­reinigt werden, und auch ein eventuell notwendiges Reinigen der Gegendruckwalze kann durchgeführt werden. Sollte sich das Papier im Halterahmen verklemmt haben, kann es bei her­ausgezogener Thermodruckplatine ohne weiteres erfaßt und wieder in die richtige Lage gebracht werden.The open design of the latching hooks 38, 40 and the provision of the holding device for the compression springs 54, 56 make it possible to pull the thermal printing plate 28 out of the holding frame without further ado. The thermal printing plate 28 is provided with an extendable handle element 70 which has two elongated holes 72, 74, so that it can be shifted to the left in the illustration of FIGS. 1 and 2. This enables a better grip on the grip element 70 when the thermal printing board 28 is to be pulled out of the holding frame. When a tensile force is exerted on the grip element 70, this is first shifted to the left until the elongated holes 72, 74 abut against the support pins 76, 78, and a tensile force is then exerted on the thermal printing plate 28 which is large enough to bear that of the compression springs 54, 56 over the locking hooks 38, 40 to overcome the transverse force exerted on the axle 42. The latching hooks 38, 40 therefore slide over the axis 42 with further compression of the springs 54, 56, so that the thermal printing plate 28 can be pulled out of the holding frame to the left. The compression springs 54, 56 are held by the holding device 48, 50, 52 so that they cannot be lost. Im forth pulled out state, the thermal printing plate can be easily cleaned, and any necessary cleaning of the counter-pressure roller can be carried out. If the paper is jammed in the holding frame, it can be easily grasped with the thermal printing plate pulled out and brought back into the correct position.

Da die Platten 50, 52 der Haltevorrichtung und die Druckfe­dern 54, 56, wie aus Fig. 2 ersichtlich ist, mit bezüglich der Entnahmerichtung der Thermodruckplatine 28 abgewinkelten Enden versehen sind, kann die Thermodruckplatine 28 ohne weiters wieder in den Halterahmen eingeschoben werden, da diese abgewinkelten Enden wie Einführungsschrägen wirken.Since the plates 50, 52 of the holding device and the compression springs 54, 56, as can be seen from FIG. 2, are provided with ends which are angled with respect to the removal direction of the thermal printing plate 28, the thermal printing plate 28 can easily be pushed back into the holding frame, since these angled ends act like chamfers.

Der beschriebene Thermodruckkopf ist wegen der Entnehmbar­keit der Thermodruckplatine sehr bedienungs- und wartungs­freundlich; insbesondere kann der Bereich, in dem der eigent­liche Druckvorgang stattfindet und in dem es durch Abrieb zu Verschmutzungen kommt, gut gereinigt werden.The thermal print head described is very easy to use and maintain due to the fact that the thermal print board can be removed; in particular, the area in which the actual printing process takes place and in which soiling is caused by abrasion can be cleaned well.

Claims (4)

1. Thermodruckkopf mit einem Halterahmen, einer Thermo­druckplatine, die auf einer Vorderseite mehrere längs einer Linie angeordnete, einzeln ansteuerbare Heizelemente auf­weist, und einer in dem Halterahmen drehbar gelagerten Ge­gendruckwalze, gegen die die Thermodruckplatine kraftschlüs­sig so in Anlage gehalten ist, daß die Linie der Heizelemen­te die Umfangsfläche der Gegendruckwalze längs einer achs­parallelen Mantellinie berührt, dadurch gekennzeichnet, daß an der Thermodruckplatine (28) wenigstens ein mit einem an dem Halterahmen (12, 14, 16, 18, 20, 22) befestigten Stift (42) in Eingriff stehender Rasthaken (38, 40) an einer Stel­le angebracht ist, die im Abstand von der Linie (30) der Heizelemente liegt, daß im Bereich zwischen dem wenigstens einen Rasthaken (38, 40) und der Linie (30) der Heizelemente wenigstens eine Druckfeder (54, 56) zwischen einem fest mit dem Halterahmen (12, 14, 16, 18, 20, 22) verbundenen An­schlag (62, 64) und der von der Vorderseite der Thermodruck­platine (28) abgewandten Rückseite der Thermodruckplatine (28) angebracht ist, und daß der wenigstens einen Druckfeder (54, 56) eine Haltevorrichtung (50, 52, 48) zugeordnet ist, die die Druckfeder (54, 56) an der Thermodruckplatine (28) festhält.1.Thermal print head with a holding frame, a thermal printing plate which has a plurality of individually controllable heating elements arranged along a line on a front side, and a counter-pressure roller which is rotatably mounted in the holding frame and against which the thermal printing plate is held non-positively so that the line of heating elements touches the peripheral surface of the counter-pressure roller along an axially parallel surface line, characterized in that on the thermal printing plate (28) at least one latching hook (42) which engages with a pin (42) fastened to the holding frame (12, 14, 16, 18, 20, 22) 38, 40) is attached at a point which is at a distance from the line (30) of the heating elements, that in the area between the at least one latching hook (38, 40) and the line (30) of the heating elements at least one compression spring (54, 56) between a stop (62, 64) which is fixedly connected to the holding frame (12, 14, 16, 18, 20, 22) and from the front of the thermal print latine (28) facing away from the thermal printing plate (28) is attached, and that the at least one compression spring (54, 56) is assigned a holding device (50, 52, 48), which the compression spring (54, 56) on the thermal printing plate (28 ) holds. 2. Thermodruckkopf nach Anspruch 1, dadurch gekennzeichnet, daß an der Thermodruckplatine (28) zwei Rasthaken (38, 40) angebracht sind und daß der Stift, mit dem die Rasthaken (38, 40) in Eingriff stehen, von einer sich zwischen zwei Seitenplatten des Halterahmens parallel zur Gegendruckwalze (26) erstreckenden Achse (42) gebildet ist.2. Thermal print head according to claim 1, characterized in that on the thermal printing plate (28) two latching hooks (38, 40) are attached and that the pin with which the latching hooks (38, 40) are engaged, one between two side plates of the holding frame is formed parallel to the counter-pressure roller (26) extending axis (42). 3. Thermodruckkopf nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Haltevorrichtung (50, 52, 48) von einer Platte gebildet ist, die auf wenigstens einem senkrecht zur Rückseite der Thermodruckplatine (28) verlaufenden Stift (44, 46) um einen vorbestimmten Weg verschiebbar ist und das von der Rückseite der Thermodruckplatine (28) abgewandte Ende der Druckfeder (54, 56) umfaßt, daß der Anschlag (62, 64) mit der die Haltevorrichtung bildenden Platte (50, 52) in Eingriff gehalten ist und daß der vorbestimmte Weg größer als der Abstand des Anschlags (62, 64) von der Rückseite der Thermodruckplatine (28) ist.3. Thermal print head according to claim 1 or 2, characterized in that the holding device (50, 52, 48) is formed by a plate which on at least one perpendicular to the back of the thermal printing plate (28) extending pin (44, 46) around a predetermined Is displaceable and the end of the compression spring (54, 56) facing away from the back of the thermal printing plate (28) comprises that the stop (62, 64) is held in engagement with the plate (50, 52) forming the holding device and that predetermined path is greater than the distance of the stop (62, 64) from the back of the thermal printing board (28). 4. Thermodruckkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei Druckfedern (54, 56) symme­trisch zu einer die Linie (30) der Heizelemente halbierenden und senkrecht zu dieser Linie verlaufenden Linie angebracht sind und daß die Haltevorrichtung für jede der Druckfedern (54, 56) eine Platte (50, 52) aufweist, wobei die beiden Platten (50, 52) durch einen Steg (48) miteinander verbunden sind.4. Thermal print head according to one of the preceding claims, characterized in that two compression springs (54, 56) are attached symmetrically to a line (30) of the heating elements bisecting and perpendicular to this line and that the holding device for each of the compression springs (54 , 56) has a plate (50, 52), the two plates (50, 52) being connected to one another by a web (48).
EP90104073A 1989-03-21 1990-03-02 Thermal print head Expired - Lifetime EP0388684B1 (en)

Applications Claiming Priority (2)

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DE3909286 1989-03-21
DE3909286A DE3909286A1 (en) 1989-03-21 1989-03-21 THERMAL PRINT HEAD

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EP0388684A2 true EP0388684A2 (en) 1990-09-26
EP0388684A3 EP0388684A3 (en) 1990-12-27
EP0388684B1 EP0388684B1 (en) 1994-01-26

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EP (1) EP0388684B1 (en)
DE (2) DE3909286A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032301A1 (en) * 1997-12-23 1999-07-01 Datacard Corporation Adjustable printhead mounting mechanism

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335002A (en) * 1991-09-30 1994-08-02 Rohm Co., Ltd. Printing head and printer incorporating the same
DE4139891C2 (en) * 1991-12-04 1996-05-09 Esselte Meto Int Gmbh Bracket arrangement for a thermal print head
DE4219798A1 (en) * 1992-06-17 1993-12-23 Esselte Meto Int Gmbh Thermal print head with mechanism for head access - has head mounted on lever arrangement with eccentric element turned to effect release
US5440328A (en) * 1992-10-05 1995-08-08 Atlantek, Inc. Single-pass multi-color thermal printer
GB2282568B (en) * 1993-09-22 1998-04-22 Asahi Optical Co Ltd Thermal line printer
DE4332576A1 (en) * 1993-09-24 1995-03-30 Esselte Meto Int Gmbh Thermal print head holder
US5631690A (en) * 1994-02-03 1997-05-20 Seikosha Precision Inc. Recording apparatus
US5541635A (en) * 1994-03-18 1996-07-30 Mettler-Toledo, Inc. Printer mechanism
KR0152471B1 (en) * 1995-08-28 1998-10-15 김광호 Thermal head pressing apparatus for fax
JP3309038B2 (en) * 1995-09-29 2002-07-29 アンリツ株式会社 Thermal head holding structure
DE19720671A1 (en) * 1996-05-29 1997-12-04 Eastman Kodak Co Adjustable print head holder for printer, copier, or facsimile device
FR2837423B1 (en) * 2002-03-21 2004-06-18 A P S Engineering THERMAL PRINTING MECHANISM, ESPECIALLY APPLICABLE TO PAYMENT TERMINALS

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199677A (en) * 1981-06-03 1982-12-07 Canon Inc Nonimpaction type printer
JPS58171978A (en) * 1982-04-02 1983-10-08 Nec Corp Transfer type heat-sensitive printer
JPS5939563A (en) * 1982-08-31 1984-03-03 Fuji Xerox Co Ltd Transfer type heat sensitive recorder
JPS60184867A (en) * 1984-03-02 1985-09-20 Matsushita Graphic Commun Syst Inc Thermal recorder
DE3609789A1 (en) * 1986-03-22 1987-10-01 Espera Werke Gmbh Thermal printer for labels mounted detachably on a backing strip, and for strip material
JPS63134274A (en) * 1986-11-26 1988-06-06 Tokyo Electric Co Ltd Thermal head supporter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630880A (en) * 1979-08-24 1981-03-28 Hitachi Ltd Positioning mechanism for heat-sensitive recorder
JPS61190431A (en) * 1985-02-13 1986-08-25 株式会社　サト− Table type thermal printer
DE3507782A1 (en) * 1985-03-05 1986-09-11 Hellige Gmbh, 7800 Freiburg BRACKET FOR A THERMAL PRINT HEAD
DE3735361A1 (en) * 1987-10-19 1989-05-03 Standard Elektrik Lorenz Ag Thermal printer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199677A (en) * 1981-06-03 1982-12-07 Canon Inc Nonimpaction type printer
JPS58171978A (en) * 1982-04-02 1983-10-08 Nec Corp Transfer type heat-sensitive printer
JPS5939563A (en) * 1982-08-31 1984-03-03 Fuji Xerox Co Ltd Transfer type heat sensitive recorder
JPS60184867A (en) * 1984-03-02 1985-09-20 Matsushita Graphic Commun Syst Inc Thermal recorder
DE3609789A1 (en) * 1986-03-22 1987-10-01 Espera Werke Gmbh Thermal printer for labels mounted detachably on a backing strip, and for strip material
JPS63134274A (en) * 1986-11-26 1988-06-06 Tokyo Electric Co Ltd Thermal head supporter

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, nr. 29 (M-451)[2086], 5. Februar 1986; & JP-A-60 184 867 (TAKAMIZAWA) 20-09-1985 *
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 381 (M-752)[3228], 12. Oktober 1988; & JP-A-63 134 274 (FUKUSHIMA) 06-06-1988 *
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 50 (M-197)[1195], 26. Februar 1983; & JP-A-57 199 677 (HASHIMOTO) 07-12-1982 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 143 (M-306)[1580], 4. Juli 1984; & JP-A-59 39 563 (ISHIKAWA) 03-03-1984 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 9 (M-268)[1446], 14. Januar 1984; & JP-A-58 171 978 (SAKAMOTO) 08-10-1983 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032301A1 (en) * 1997-12-23 1999-07-01 Datacard Corporation Adjustable printhead mounting mechanism
US6095701A (en) * 1997-12-23 2000-08-01 Datacard Corporation Adjustable print head mounting mechanism

Also Published As

Publication number Publication date
EP0388684B1 (en) 1994-01-26
DE3909286A1 (en) 1990-09-27
US5055858A (en) 1991-10-08
DE59004376D1 (en) 1994-03-10
EP0388684A3 (en) 1990-12-27
DE3909286C2 (en) 1991-09-12

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