EP0023268B1 - Punktdrucker mit einem schwenkbaren Druckkopf - Google Patents

Punktdrucker mit einem schwenkbaren Druckkopf Download PDF

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Publication number
EP0023268B1
EP0023268B1 EP80103542A EP80103542A EP0023268B1 EP 0023268 B1 EP0023268 B1 EP 0023268B1 EP 80103542 A EP80103542 A EP 80103542A EP 80103542 A EP80103542 A EP 80103542A EP 0023268 B1 EP0023268 B1 EP 0023268B1
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EP
European Patent Office
Prior art keywords
head
printer
print head
print
dots
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
EP80103542A
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English (en)
French (fr)
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EP0023268A1 (de
Inventor
John Mark Choberka
Donald Karl Rex
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International Business Machines Corp
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International Business Machines Corp
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Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0023268A1 publication Critical patent/EP0023268A1/de
Application granted granted Critical
Publication of EP0023268B1 publication Critical patent/EP0023268B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface

Definitions

  • the present invention relates to a printer with a print head by dots with a matrix of threads, and more particularly such a printer comprising a head which can be tilted.
  • Wire matrix dot printers are well known in the prior art. They generally include a print head with a matrix of threads mounted in a carriage which allows its lateral movement. The printer furthermore comprises a paper handling device allowing the paper to be fed, either in sheets or in continuous strip, around the platen. The print head moves laterally in front of the paper, either step by step or at constant speed. It has several thin wires, for example eight. One end of each wire is connected to an actuator which can be energized to drive the wire forward. The other ends of the wires are aligned vertically in the vicinity of the plate.
  • the ink ribbon is disposed between the ends of the wires and the paper so that when an actuator is energized, a wire is driven forward and strikes the ribbon against the paper on which a dot is printed.
  • characters can be printed by the wires on the paper in a manner well known to those skilled in the art.
  • a thread matrix dot print head is described for example in patent FR-A 2 253 629 and means controlling it for printing alpha-numeric characters are presented in patent FR-A 2 374 691.
  • patent US-A 3 987 883 the description of the mounting of the print head in the printer.
  • a thread matrix dot printer which controls several passes of its print head on the same line in order to print dots between those previously printed. This eliminates the free spaces existing between the points. It has been described in the "IBM Technical Disclosure Bulletin of May 1978, Vol. 20, No. 12 page 5097 and 5098, a printer of this type in which the printing threads are moved a distance equal to half a spacing measured between the centers of the dots previously printed so that during a second pass of the print head on the same line, dots are printed between the dots printed during the first pass. In addition, the printer speed is reduced by half, so that the horizontal distance between the dots is reduced by half and the printed dots overlap.
  • the print head In the printer described in the review "IBM Technical Disclosure Bulletin cited above and which includes a tilting print head used for printing dots between dots previously printed on a vertical line, the print head is rotatably mounted in a cradle and a solenoid is excited to cause it to rotate.
  • a stop means is provided to limit the rotation of the head so as to arrange the printing threads in an appropriate manner so that the printing of the dots takes place between the previously printed dots.
  • the second zone where the tolerances must be low or zero consists of the stop means.
  • the stop means must therefore be a precision machined part.
  • the repeated movement of the print head against the stop means will cause the periodic replacement of the latter due to its wear and deterioration.
  • the present invention relates to a printer comprising a dot matrix print head, a matrix of threads, this head comprising several print threads which are actuated to print a series of first dots on a recording medium, while the head is moves laterally in front of said medium, and said head can be tilted to print a series of second dots between the first printed dots.
  • the printing wires are such that the center of the end of each wire is separated from the center of the adjacent wires by a given distance.
  • the printer further comprises a carriage that can move in front of said medium and carrying the print head and rotation means for pivoting the print head relative to the carriage, and this, around an axis of rotation.
  • the rotation means comprise two cylindrical rotation shafts extending on either side of the print head and defining the axis of rotation, two receptacles for rotation shafts fixed to the carriage, each receptacle comprising an element of receiving one end of which defines a concave recess of angular shape in which is housed the rotation shaft associated therewith, flexible means respectively associated with said receptacles, each flexible means holding the rotation shaft in the angular recess, means for pivoting the head about the axis of rotation and means for limiting the pivoting of the head so that the printing threads print the series of first dots and then the series of second dots.
  • FIG 1 is a perspective view of a printer 10 having a print head 12 made according to the teachings of the present invention.
  • the printer 10 comprises a ribbon holder 14 which ensures the passage of the ink ribbon in front of the print head 12.
  • the printer 10 comprises. a plate 16 arranged on the side of the ribbon opposite the print head 12.
  • the printer 10 also includes a paper feeding system 18 comprising two drive elements 20 which feed the paper or any other recording medium around the plate 16 and in front of the print head 12 to allow printing. characters on paper.
  • the recording medium may consist of a strip of continuous paper with perforated marginal strips, entrained in the supply system 18 by the elements 20, or consist of sheets of paper introduced behind the plate 16 and entrained by pressure rollers when the plate 16 is rotated.
  • the movement of the paper in the feed system 18 is controlled by stepping motors (not shown) which respond to electrical signals.
  • the printing of the characters on the paper is caused by the actuation of one or more threads of the print head 12 in order to cause their movement forward and the striking of the ribbon against the paper which is held firmly by the plate 16. Then the wire is unconditioned and returns to its initial position, leaving a dot printed on the paper.
  • the print head 12 moves from the left margin to the right and the wires are actuated so as to cause the printing of adjacent dots which form characters on the paper arranged around the plate 16.
  • the print head 12 includes eight thin wires arranged in a vertical column on the side of the head 12 closest to the plate 16. One end of the seven upper wires of the vertical column is used for printing the characters while the remaining lower wire is used for underlining.
  • the opposite ends of the wires are connected to eight individual actuators mounted in a circle.
  • the actuating devices of the print head 12 are protected by a cover 22.
  • the print head 12 is described in detail in the patents FR-A 2 253 629 and US-A 3 987 883 cited above.
  • the print head 12 is driven from left to right and from right to left along the plate 16 on two rails 26 and 28 by a stepping motor (not shown) connected to a set of pulleys and belts 24 .
  • a single line of characters is printed when the print head 12 moves from the left, as seen in Figure 1, to the right. Then, the plate 16 is rotated to advance the paper by a line spacing and the print head 12 is brought back to the left in its position of FIG. 1. During its movement from right to left, a second line of characters is printed on the paper, and the characters are as shown in Figure 2. Since the threads must be physically separated from each other to avoid wear and deterioration, the printed dots are also separated from each other.
  • the horizontal spacing of the points is determined by the speed of the print head 12 when it travels laterally through the plate 16 and by the rate of excitation printing wire actuators.
  • Figures 4, 5 and 6 show a printhead assembly 12 which comprises the printhead itself 30 similar to that presented in patent FR-A 2 253 629 cited above and which rocks in a cradle 32.
  • the Figures 4, 5 and 6 are respectively perspective, top and side views of the print head 30 and its cradle 32.
  • the print head 30 comprises eight actuating devices 36 which can be of the type described in the patent FR-A 2 253 629 cited above.
  • the actuating devices 36 each control a particular print wire 38 and are arranged in a circle behind the print head 30.
  • the wires 38 are guided in vertical alignment in the housing 40 of the print head 30 and open out along a vertical line at the front 42 of the head 30. Each of them must be physically separated at all points from neighboring wires to avoid their wear and deterioration which could be caused by their friction.
  • the printed circuit panel 44 is placed between the actuating devices 36 and the casing 40 of the printhead 30. and the printed wires of this table connect each of the actuating devices 36 to the connector 46.
  • the print head 30 is mounted in the head support or cradle 32 by means of two support elements 48 and 50 and this assembly will be described in more detail later.
  • the head support or cradle 32 comprises an oil reservoir 52, the top of which is extended by an ear 54.
  • the cradle 32 also comprises two pivot axes 56 and 58 fixed in its sides.
  • a finger 60 having a cylindrical section part 62 and a diamond-shaped section part 64, the tips of which at the ends of the long diagonal are truncated, are fixed in the cradle 32 by a locking screw 66.
  • the part with a diamond-shaped section 64 of the finger 60 has a vertical axis parallel to the aligned wires 38 of the head, which is longer than its horizontal axis.
  • FIGS 7, 8, 9 and 10 show how the print head 30 is mounted in the cradle 32 via the support elements 48 and 50 which will now be described.
  • the cradle 32 has four legs, three of which, the legs 68, 70 and 72 are shown in the figures.
  • the legs 68 and 70 are lateral legs located on the left side when facing the direction of actuation of the wires and the leg 72 as well as the one which is not shown and which is similar to the leg 70, are the two straight side legs of the cradle 32.
  • the legs 68 and 72 constitute the two front legs while the leg 70 and the leg not shown, constitute the two rear legs.
  • Each of the legs 68, 70 and 72 has a passage 74.
  • each of the support elements is of cylindrical section with the exception of the support element 50 whose part 76 crossing the passage 74 of the leg 68 has a diamond-shaped section, its long vertical axis being parallel to the line of the wires 38.
  • the part 76 with diamond-shaped section aims to minimize alignment problems during the manufacture of the cradle 32.
  • the support elements 48 and 50 can be arranged in the passages made in the front legs 68 and 72 with a relatively large clearance compared to what it would be in the case of a part 76 which would be cylindrical.
  • the lateral play of the print head 12 is not as critical as the vertical play since the head 12 only rotates at a very small angle corresponding to half the center to center distance separating the adjacent printed dots.
  • Each of the support elements 48 and 50 has a conical front end 78 which is housed in a corresponding conical recess of an element 80.
  • the element 80 is made integral with the housing 40 by an arm 82.
  • the part of the support elements 48 and 50 comprised between the passages 74 of the lateral legs such as the legs 68 and 70 of FIGS. 8 to 10, comprises a stop 84 and a spring 86 which is arranged between the rear legs, such as the leg 70, and the stop 84.
  • the stop 84 is placed on the support elements 48 and 50 so that, when the print head 30 is mounted in the cradle 32, it is applied against the front legs 68 and 72 by the spring 86.
  • the rear end of the support elements 48 and 50 has a cylindrical section 88 of reduced diameter compared to that of the main part, and integral with the latter.
  • the rear end of the support elements 48 and 50 is introduced into a housing provided in the rear receiver block 90 connected to the circuit board 44 which is itself connected to the housing 40.
  • An insulator 92 is provided at the bottom of the housing of the block receiver 90 to isolate the printed circuit board 44 from the support elements 48 and 50. These are introduced into the receiver block 90 by pressing the spring 94.
  • the length of the support elements 48 and 50 is less than the distance separating on the one hand the bottom of the conical housing of the element 80 and, on the other hand, the rear part of the block 90, so that the spring 94, when it is disposed between the insulator 92 and the rear end 96 of the main part of the elements 48 and 50, exerts a force against the housing 40, which keeps the conical end 78 in the conical housing 80.
  • Each of the support elements 48 and 50 further comprises a hole 98 machined in its center so that said hole is disposed in the passage 74 of the rear legs of the cradle 32, for example in the leg 70, when the support elements 48 and 50 abut and rest on the conical housing 80 and that the spring 86 is extended to the maximum.
  • the hole 98 can be exposed by moving the print head 30 and the support elements 48 and 50 rearward relative to the cradle 32, which compresses the spring 86. This operation can be carried out quickly using the handle 97 .
  • the first step consists pushing back the print head 30 and the support elements 48 and 50 while maintaining the cradle 32 in the position of FIG. 9, which compresses the spring 86 and exposes the hole 98. Then a pin 100 is introduced into the hole 98.
  • the housing 40 and the support elements 48 and 50 are then driven forward by the force exerted by the spring 86 and brought into a position such that the pin 100 bears against the rear legs 70 of the cradle 32 Then, as seen in the Figu re 10, the housing 40 is pushed forward while the support elements 48 and 50 are held in a fixed position by the pin 100 which bears against the rear legs 70; this forward movement is large enough to cause withdrawal of the conical end 78 of the support elements of the conical housings 80. This position is shown in solid lines in FIG. 10. During this movement, the spring 94 is compressed and the rear end 88 of the support elements 48 and 50 moves towards the insulator 92 situated in the rear receiver block 90.
  • the complete housing is moved downwards, as indicated by arrow 102, so that the housing conical 80 is located in position 80A.
  • the spring 94 returns to its normal state, thus driving the housing in the direction indicated by the arrow 104, which causes the conical housing 80 to pass into position 80B.
  • the support elements 48 and 50 have been released from the rear receiver unit 90 which is now in position 90B and the print head 32 can be removed by lifting the rear side of the housing 40 and releasing it from the cradle 32 while removing the front side 82 from under the support elements 48 and 50.
  • Figure 4 shows the carriage 34.
  • the print head 30 and the cradle 32 assembled by the support elements 48 and 50 as described above, are pivotally mounted in the carriage 34.
  • the front side of the carriage 34 has a slide 106 mounted on the rail or shaft 28.
  • the slide 106 includes the bearing 108 and a support 110 for a second bearing (not shown) disposed under the carriage 34.
  • a third bearing similar to the bearing 108 is also provided on the side of the hidden slide 106 by the tree 28.
  • the other side of the carriage 34 also has the same bearings.
  • the carriage 34 also includes a second slide 112 mounted on the shaft 26 in a well known manner.
  • the right side of the carriage 34 comprises the ribbon drive mechanism 114 which comprises a hub 116 to be introduced into the ribbon holder 14.
  • the ribbon (not shown) is driven from the ribbon holder 14, around the front side 42 of the print head 30 and brought to the rear of the magazine 14 in a manner well known in the prior art.
  • the carriage 34 includes a member for receiving pivot axes 118 on both sides of the print head 30. In order to simplify the figure, only one of these two reception elements 118 has been shown, it being understood that a similar element is provided on the other side of the print head 30.
  • Figure 6 shows the rotational mounting of the cradle 32 on the carriage 34. As indicated above, it is a pivoting assembly, that is to say that the cradle 32 pivots around the axes 56 and 58.
  • the pivot axis receiving assembly 118 of the carriage 34 is crossed by two passages 152 and 154.
  • the pivot axis receiver 156 is introduced into the passage 152 and comprises a head 158 of large dimension and the base of which comprises a cutout 160.
  • the configuration of the cutout 160 is such that it can receive the head of the screw 162 which is introduced into the passage 154.
  • the other side of the pivot axis receiver 156 has a V-groove 164.
  • the V-groove 164 and the cutout 160 of the head 158 are aligned so that, when the head of the screw 162 is housed in the cutout, the V-groove 164 is in a position allowing it to receive the pivot axis 58 from cradle 32.
  • the pivot holder 166 is fixed to the receiving element 118 by the screw 162 and has a horizontal U-shaped groove 168 oriented perpendicular to the view in FIG. 6.
  • the diameter of the circular part of the U-shaped groove 168 is slightly greater than the diameter of the pivot axis 58 so that the latter can be housed in said U-shaped groove.
  • a bore 170 is provided for receiving the spring 172 and it is aligned with the pivot axis receiver 156 when the holder -pivot 166 is fixed by the screw 162.
  • the spring 172 is compressed when the pivot holder 166 is fixed by the screw 162 so that it applies a force against the pivot axis 58 and keeps it in the V-groove 164.
  • the carriage 34 also includes a distance control device 120 disposed on its left side as seen in Figure 4.
  • the plate 122 is fixed to the control device 120 and constitutes an extension thereof.
  • the height of the control device 120 and of the plate 122 is chosen so that the top of the plate 122 is disposed under the ear 54 of the cradle 32.
  • a solenoid 124 is fixed under the plate 122 by the screws 130 and 132 and the piston 126 of the solenoid 124 passes through a passage 128 formed in the plate 122.
  • a locking screw 134 is fixed in the ear 54 in alignment with the point where the piston 126 comes into contact with the plate 154. The locking screw 134 is adjusted so as to be in light contact with the piston 126 when the solenoid 124 is not excited.
  • the plate 122 is fixed to the device 120 by the screw 136.
  • the plate 122 has a vertical hole 138 and the device 120 a horizontal hole 140 aligned to receive the finger 60 of the cradle 32.
  • the hole 140 receives a socket 142 fixed by a locking screw 144 disposed in the vertical hole 138.
  • the length of the socket 142 and that of the diamond-shaped section portion 64 of the finger 60 are approximately equal so that the portion 64 of the finger 60 is movable in the socket 142.
  • the internal diameter of the sleeve 142 is slightly greater than the longest diameter of the part 64 of the finger 60.
  • the finger 60 also has a flat part 146 aligned with a bore 148 formed in the device 120 (see Figure 7).
  • the spring 150 is housed in the bore 148 and kept compressed against the flat part 146 by the plate 122. In this way the finger is kept in the normal low position as seen in FIG. 7.
  • the angle of rotation of the cradle 32 on the carriage 34 is controlled by the movement of the diamond-shaped section 64 of the finger 60 in the socket 142 and this is shown in Figures 7, 11 and 12.
  • the spring 150 applies a force against the flat part 146 of the finger 60 causing the application of the lower part of the part 64 of the finger 60 against the inner lower part of the sleeve 142 as shown in FIGS. 7 and 11.
  • the force applied against the ear 54 is greater than that applied by the spring 150 against the finger 60.
  • the ear 54 therefore moves upwards and carries with it the whole cradle 32, including finger 60.
  • the difference between the inside diameter of the sleeve 142 and the long axis of the part 64 of the finger 60, can be chosen to control the movement of the printing wires 38 over a distance corresponding to half the center to center distance separating the threads or, in other words, to half the center to center distance separating the printed dots.
  • This difference between the inside diameter of the sleeve 142 and the long vertical axis of the diamond-shaped section 64 of the finger 60 can be easily determined by rendering the ratio existing between the distance separating the axis of rotation from the axes 56 and 58, on the front side 42 and the distance separating this axis of rotation of the finger 60, equal to the ratio existing between on the one hand the desired movement of the wires 38 and on the other hand the difference between the internal diameter of the sleeve 142 and the axis vertical along the diamond section 64 of finger 60.
  • Figure 13 shows schematically the control circuit of the printer 10 which can be used with a processor 174 delivering signals to control the logic 176 in order to cause the printing of a line of characters.
  • the control logic 176 stores the characters to be printed and delivers the control signals from the tilting solenoid 124 to control the lateral movement of the print head 12, the feeding of the paper by the paper feeding system 18 and the triggering of the eight actuation devices of the printing wires 36.
  • This control system with the exception of the control of the tilting solenoid 124, is described in detail in patent FR-A 2 374 691.
  • the control of the solenoid tilting requires the conditioning of a rocker at the end or to the right of the movement from left to right of the printhead and the maintenance of this conditioning throughout the movement from right to left of said printhead.
  • the output of the flip-flop can be coupled, by appropriate excitation circuits, to the control solenoid 124.

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  • Common Mechanisms (AREA)
  • Impact Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Claims (7)

1. Druckvorrichtung mit einem Punktdruckkopf (30, 32), der eine Drahtpunktmatrix (38) aufweist,
wobei der Punktdruckkopf mehrere Punktdrähte zum Drucken einer Serie von ersten Punkten auf einem Aufzeichnungsmedium enthält, wenn sich der Punktdruckkopf gegenüber dem Aufzeichnungsmedium lateral bewegt,
und wobei der Punktdruckkopf derart verschwenkt werden kann, daß eine Serie von zweiten Punkten zwischen den genannten ersten Punkten gedruckt wird,
wobei die Mittelachse der Enden jedes Druckdrahtes des mehrere Druckdrähte (38) umfassenden Punktdruckkopfes (30, 32) von der Mittelachse des benachbarten Druckdrahtes entsprechend beabstandet ist,
und der Punktdruckkopf auf einem sich gegenüber dem Aufzeichnungsmedium bewegenden Wagen (34) angeordnet ist,
und die Drehmittel zum Verschwenken des Punktdruckkopfes um eine Drehachse gegenüber dem Wagen durch zwei zylindrische Verschwenkungsarme definiert sind, die sich beiderseits des Punktdruckkopfes erstrecken, dadurch gekennzeichnet,
daß die Drehmittel zwei an dem Wagen befestigte Aufnahmemittel (118) für die Verschwenkungsarme aufweisen, wobei jedes Aufnahmemittel ein Aufnahmeglied (156) für die Drehachsen enthält, dessen eines Ende eine winkelförmige Aushöhlung (164) aufweist, in der der Verschwenkungsarm (56 oder 58) aufgenommen ist,
daß mit den Aufnahmemitteln federnde Mittel (172) zusammenwirken, wobei jedes Aufnahmemittel den Verschwenkungsarm in der winkelförmigen Aushöhlung (164) hält,
daß die als Federelement ausgebildeten federnden Mittel in einem Gehäuse angeordnet sind und daß jedes Gehäuse eine Aufnahmeführung (168) für den entsprechenden Verschwenkungsarm (56 oder 58) und eine Aussparung (170) aufweist, die einen Raum für die Aufnahmeführung und den Verschwenkungsarm (56 oder 58) aufweist,
wobei das vorgespannte Federelement (172) und das Aufnahmeglied (156) für die Drehachse beidseits des Verschwenkungsarmes in der Aussparung (170) so angeordnet sind, daß das Federelement den Verschwenkungsarm in der winkelförmigen Aushöhlung (164) des Aufnahmegliedes (156) für die Drehachse hält, und
daß Mittel (124) vorgesehen sind zur Verschwenkung des Punktdruckkopfes um die Drehachse, sowie Mittel (64, 142) zur Begrenzung der Verschwenkungsbewegung des Punktdruckkopfes, so daß die Punktdrähte zunächst die Serie der ersten Punkte und dann die Serie der zweiten Punkte drucken.
2. Druckvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Serie der ersten Punkte gedruckt wird, wenn sich der Punktdruckkopf entlang des Aufzeichnungsmediums in eine erste Richtung bewegt, und daß die Serie der zweiten Punkte gedruckt wird, wenn sich der Punktdruckkopf in die zur ersten entgegengesetzte Richtung bewegt.
3. Druckvorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Aussparung (170) zylindrisch ist, und die Aufnahmeführung (168) eine U-förmige zwischen dem vorgespannten Federelement (172) und dem Verschwenkungsarm angeordnete Nut aufweist, wobei der Durchmesser des zylindrischen Teiles der Nut etwas grösser als der Durchmesser des Verschwenkungsarms (56 oder 58) ist.
4. Druckvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Aufnahmemittel (118) und das Gehäuse mittels des gleichen Befestigungselements (162) mit dem Wagen verbunden sind.
5. Druckvorrichtung nach Anspruch4, dadurch gekennzeichnet, daß das Aufnahmemittel (118) ein Finger (Stift) ist, dessen eines Ende auf einer Seite die Aushöhlung (164) und auf der anderen Seite einen Kopf mit einem Einschnitt aufweist, und daß das Befestigungselement eine Schraube (162) ist, die das Gehäuse an dem Wagen befestigt, wobei ein Teil des Schraubenkopfes den Einschnitt derart überlappt, daß er das Aufnahmemittel an dem Wagen befestigt.
6. Druckvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Einschnitt zur Aufnahme des Teiles des Schraubenkopfes derart gestaltet ist, daß bei Ausrichtung dieses Einschnittes zur winkeligen Aushöhlung (164) in der zueinander vorgeschriebenen Lage die Aushöhlung den Verschwenkungsarm (56 oder 58) aufnimmt, wenn die Schraube den Einschnitt paßgerecht überlappt, um die Schraube an dem Wagen zu befestigen.
7. Druckvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittel (124) zur Verschwenkung des Kopfes um die Drehachse erstens ein an dem Wagen befestigtes Solenoid, das bei Erregung den Kopf in eine Richtung antreibt, und zweitens ein Federelement aufweist, das den Kopf in der entgegengesetzten Richtung antreibt, wenn das Solenoid nicht mehr erregt ist.
EP80103542A 1979-07-30 1980-06-24 Punktdrucker mit einem schwenkbaren Druckkopf Expired EP0023268B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6225779A 1979-07-30 1979-07-30
US62257 1979-07-30

Publications (2)

Publication Number Publication Date
EP0023268A1 EP0023268A1 (de) 1981-02-04
EP0023268B1 true EP0023268B1 (de) 1983-11-16

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EP80103542A Expired EP0023268B1 (de) 1979-07-30 1980-06-24 Punktdrucker mit einem schwenkbaren Druckkopf

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EP (1) EP0023268B1 (de)
JP (1) JPS5621873A (de)
AU (1) AU530234B2 (de)
BR (1) BR8004722A (de)
CA (1) CA1153244A (de)
DE (1) DE3065600D1 (de)
ES (1) ES8105636A1 (de)
IT (1) IT1149808B (de)

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EP0031948B1 (de) * 1979-12-26 1986-10-15 Asahi Kasei Kogyo Kabushiki Kaisha Elektrode für die Wasserstoff-Erzeugung
US8126614B2 (en) 2005-09-08 2012-02-28 Volvo Lastvagnar Ab Selective anti-lock braking system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086997A (en) * 1977-03-07 1978-05-02 Wang Laboratories, Inc. Adjustable support for print head assembly

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ES493792A0 (es) 1981-06-16
JPS5621873A (en) 1981-02-28
DE3065600D1 (en) 1983-12-22
ES8105636A1 (es) 1981-06-16
BR8004722A (pt) 1981-02-10
IT8022713A0 (it) 1980-06-11
IT1149808B (it) 1986-12-10
AU530234B2 (en) 1983-07-07
EP0023268A1 (de) 1981-02-04
JPS6228753B2 (de) 1987-06-22
AU5908580A (en) 1981-02-05
CA1153244A (en) 1983-09-06

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