EP0052066B1 - Imprimante en matrice et tête d'impression à aiguilles y afférent - Google Patents

Imprimante en matrice et tête d'impression à aiguilles y afférent Download PDF

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Publication number
EP0052066B1
EP0052066B1 EP81730090A EP81730090A EP0052066B1 EP 0052066 B1 EP0052066 B1 EP 0052066B1 EP 81730090 A EP81730090 A EP 81730090A EP 81730090 A EP81730090 A EP 81730090A EP 0052066 B1 EP0052066 B1 EP 0052066B1
Authority
EP
European Patent Office
Prior art keywords
print head
needle
mouthpiece
head according
matrix
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
EP81730090A
Other languages
German (de)
English (en)
Other versions
EP0052066A3 (en
EP0052066A2 (fr
Inventor
Wolfgang Hendrischk
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
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Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0052066A2 publication Critical patent/EP0052066A2/fr
Publication of EP0052066A3 publication Critical patent/EP0052066A3/de
Application granted granted Critical
Publication of EP0052066B1 publication Critical patent/EP0052066B1/fr
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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/25—Print wires
    • B41J2/255—Arrangement of the print ends of the wires
    • 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
    • B41J25/005—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for serial printing movements superimposed to character- or line-spacing movements

Definitions

  • the invention relates to a matrix printer with a needle print head which can be moved in print passports and which is located in the print position relative to a record carrier which can be moved between the print passes, with an adjustable mouthpiece in which the needles are guided one above the other at intervals in bores, with a basic position of the mouthpiece for quick writing and the like different positions are provided for reciprocating print passes for fine writing.
  • Such a matrix printer serves the purpose. to produce different printing qualities of the characters at different writing speeds.
  • a matrix printer only ever serves one task, namely to print characters either at high speed (but the print quality of the characters is lower) or at high print quality (but the speed of writing is lower).
  • the offset with the size zero is selected for the fast writing, while an offset of the mouthpiece greater than zero is set for the writing.
  • the present invention is therefore based on the object of creating a matrix print head with an associated needle print head. which does not relate the smallest step of paper movement to half the needle pitch because it is relatively difficult to move the paper by such small pitches.
  • the printhead to be created for fine writing or quick writing should also be usable as desired and should furthermore improve the quick writing and / or fine writing.
  • the object is achieved in that with the adjustment of the mouthpiece by partial values of the distance between two consecutive pressure needles in a needle gap, i. H. with a mechanically finer division of the matrix in character height is also an electronic finer division of the matrix in character width.
  • the ratio of the division in character height and in character width for quick writing and for fine writing is at least 0.4: 1 or greater.
  • the invention accordingly allows a combined application of the method. refine the matrix both in the needle column direction and in the writing direction, transverse to the direction of the career of the recording medium.
  • the invention solves the problem of paper feed, which can take place outside the print movement of the print head. The paper can thus be held in place during printing. All of these influences work together. to create a faster and more beautiful font in combination based on the theory of the invention.
  • only one (replaceable) printhead is required for quick and fine writing.
  • the electronic fine division can preferably use two separate character generators, with the control system (e.g. a microprocessor with program memory) alternately calling up the finely or roughly divided clocks.
  • An embodiment of the invention is provided. that the refinement of the matrix from 9 x 7 to 18 x 40, 18 x 28 or 36 x 40 is carried out on an at least two-part mouthpiece with needle gaps.
  • a practical embodiment for the drive design consists in the fact that the organ transmitting the adjusting drive force consists of a pivotable lever mounted on the printhead base frame with pole faces which are opposite the poles of a magnet which can be switched on and off.
  • the organ transmitting the adjustment drive force consists of a shaft rotatably mounted on the printhead base frame. which carries the intermediate piece, the one with mutually facing pole faces opposite the magnetic poles of two mutually associated Magnets is arranged, the shaft being connected to two mouthpieces by means of a parallelogram linkage.
  • the adjustment drive consists of one or two electromagnets.
  • the intermediate member is designed in the form of a rocker.
  • the invention also allows the intermediate member to be designed in the form of a pointer.
  • a further embodiment of the invention is that the organ connected to the mouthpiece extends approximately in the direction of the needle bundle and can be moved back and forth by means of the adjustment drive transversely to the direction of flight of the printing needles by a fraction or a multiple of a needle distance measured in the direction of movement.
  • a further practical embodiment of the invention results from the fact that the adjusting drive for the back and forth movement of the organ is formed by means of an axially fixed screw spindle which drives in both directions of rotation and runs transversely to the direction of flight of the printing needles.
  • the rotary drive for the screw spindle can consist of an eccentric magnet arranged eccentrically to the screw spindle axis, the magnetic core of which is articulated to a lever which is itself non-rotatably connected to a screw spindle shaft.
  • the back and forth movement of the adjustable mouthpiece is effected in that the lever connected to the magnetic core or to the screw spindle shaft is double-armed and that a tension spring is connected to the second lever arm and is suspended on the base frame of the printhead.
  • a favorable use of space of the available space in the needle printhead can also be achieved if the lifting magnet is arranged approximately parallel to the longitudinal axis of the printhead base frame in the area of the mouthpiece.
  • the movement of the mouthpiece is also facilitated in that the organ to which the mouthpiece is attached consists of a resilient strip.
  • an adjustment of the adjustment path for the mouthpiece can be achieved in that the screw spindle is provided with a screwdriver slot at one free end.
  • the matrix printer according to the invention is provided with only one printing needle column 1, which according to FIG. 1 consists of nine printing needles 2. With normal division of the matrix within the character width 3 or the character height 3a, d. H. The matrix printer writes fast writing in a division into seven parts (matrix 9 x 7). The mouthpiece 6 with the printing needle column 1 is in its zero position in quick writing, in each case in reciprocating printing passes (printing directions).
  • the matrix printer works in an incoming print pass, as described for FIG. 1.
  • the mouthpiece is stiffened by an amount "x and the adjustment involves an electronic change in the matrix division within the character width 3, which roughly corresponds to a doubling of the pressure points within the character" V chosen as an example.
  • the matrix refinement in the direction of the character width is 3 in the sense of the invention selectable and can e.g. B. as shown starting from a matrix 9 x 7 on 18 x 28 or on 18 x 40 or on 36 x 40.
  • FIG. 3 The outline of the wire print head used for this purpose is shown in FIG. 3.
  • the magnetic drive for the individual printing pins 2 are located on the print head base frame 4, which are guided within a housing channel 5 and essentially terminate with the mouthpiece 6.
  • the individual print lines 2 can be recognized as a dot.
  • Each pressure needle 2 is associated with an electromagnet, which is not visible further, with all current leads 7 being combined in a common plug 8.
  • the adjustment drive 10 for the mouthpiece 6, which is enclosed in the housing 11 in FIG. 3, is assigned to the needle printhead according to the invention in the front region 9. Instead of the housing 11, an attachable ribbon guide is shown in FIG. 3a.
  • the adjustment drive 10 is shown in FIG. 3b without the print head base frame 4 and without the housing 11.
  • the mouthpiece 6 (without the pressure needles 2 drawn in the rear region) is held by an organ 12 which transmits the adjustment drive force, this consisting of the lever 13.
  • the lever 13 forms pole faces 13a. 13b, which are opposite to the magnetic poles 14a, 14b of the electromagnet 14.
  • the lever 13 is made of resilient material and is pivotally mounted about the axis 15.
  • the poles 14a. 14b are held by the cross member 16. When a voltage is applied between the magnetic connections 17a, 17b, the magnet 14 pulls the lever 13 into a position in which the pole faces 13a. 13b against the magnetic poles 14a. 14b.
  • the mouthpiece 6 assumes a corresponding position, wherein the adjusting screw 18 can serve either as an adjusting means with respect to the cross member 16 or as a stop in the pivoted-off position of the lever 13.
  • the magnetic poles 14a, 14b can also consist of permanent magnets, the magnetic field of which can be canceled in whole or in part by means of the electromagnet 14.
  • FIGS. 7a and 9a show a two-part mouthpiece 6 consisting of the mouthpiece parts 6a and 6b as an alternative solution.
  • the two mouthpiece parts 6a. 6b by a parallelogram linkage 19 with the joints 19a. 19b, 19c and 19d held together.
  • the pivot axis lies between the mouthpiece parts 6a. 6b.
  • the needle gaps 1 are each formed from nine printing needles 2.
  • the parallelogram linkage 19 is driven by a shaft 20 which is rotatably mounted on the printhead housing 4 in relation to the shaft 20 which is to be described in more detail in FIGS. 7a and 9a.
  • a slight arc movement that occurs when adjusting the parallelogram linkage 19 by the amount “x (distance between two printing needles 2 within a needle gap 1) is negligibly small.
  • the normal position of the mouthpiece parts 6a, 6b shown in FIG. 4a serves for quick writing, which can be written practically twice as fast according to the two existing needle gaps 1 as with the single-column mouthpiece 6 according to FIG. 1. For this reason, the pressure points in the in FIG 4a drawn 18 x 7 matrix drawn black filled.
  • the fine writing shown in FIG. 5a is therefore based on an 18 ⁇ 28 matrix.
  • the needle print head with two adjustable mouthpiece parts 6a and 6b can be designed in several configurations of the adjustment drive 10.
  • FIG. 7 shows the needle printhead according to the invention again with the printhead base frame 4, which has housing cooling fins 4a. with built-in magnetic drives, each for the printing needles 2 with the housing channel 5, in which the printing needles 2 are guided as usual. with the power supply lines 7 for the magnetic drives and with the collecting plug 8 and with the adjusting drive 10 arranged in the front area 9, which is surrounded by the housing 11. In order to also dissipate the heat, cooling air slots 11a are provided in the housing 11.
  • the actuator 10 is shown without the housing 11.
  • the mouthpieces 6a, 6b are adjusted by means of the parallelogram linkage 19 and the shaft 20 mentioned.
  • the intermediate member 21 is attached to the shaft 20 in a rotationally fixed manner. It has pole faces 22a and 22b. which cooperate with flattened cores of the magnetic poles 23a and 24a of the magnets 23 and 24 attached to the print head base frame 4.
  • the intermediate member 21 is designed in the form of a rocker 21a.
  • the needle print head is shown with the print head base frame 4 and without the housing 11 in the front area 9.
  • the two magnets 23 and 24 are arranged vertically with their magnetic core axis.
  • the magnetic poles 23a and 24a lie opposite the pole faces 22a and 22b of the intermediate member 21, which is also designed as a rocker 21a.
  • the movement path of the rocker 21 is set and limited by adjusting screws 25a and 25b arranged in the pole faces 22a and 22b.
  • a projection 26 is fastened to the rocker 21a, which by means of a pair of tension members 27, 28 on those which are not visible. in the space behind the magnets 23 and 24 lie the parallelogram linkage 19 is attached.
  • the exemplary embodiment according to FIG. 9, as far as the print head base frame 4, the housing cooling fins 4a, the housing channel 5, the mouthpiece parts 6a, 6b and the housing 11, the cooling air slots 11a are concerned, has the same design as the embodiments of the invention described above.
  • the flattened areas of the cores of the magnetic poles 23a and 23b are placed in vertical planes (FIG. 9a), and on the shaft 20 the intermediate member 21 is fastened in a rotationally fixed manner and in the form of a pointer 21b.
  • the pointer 21 swings back and forth in the direction of the arrow 29 after a pressure pass has ended, depending on the desired position of the mouthpiece parts 6a, 6b.
  • All of the needle print heads shown in FIGS. 3, 4, 7, 8 and 9 have fastening openings 30 and 31, respectively, through which screws are guided to the print head carriage, not shown, which is moved back and forth in front of the web-shaped recording medium in the print-fitting directions.

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  • Common Mechanisms (AREA)
  • Impact Printers (AREA)

Claims (16)

1. Imprimante matricielle munie d'une tête d'impression à aiguilles pouvant se mouvoir dans des passes d'impression, qui se trouve, en position d'impression, en face d'un support d'enregistrement pouvant se mouvoir entre les passes d'impression, d'une embouchure réglable dans laquelle les aiguilles, superposées avec espacements, sont guidées dans des perforations. une position de base de l'embouchure étant prévue pour l'écriture rapide et des positions différentes de celle-ci pour l'écriture de qualité, en des passes d'impression en va-et-vient, caractérisée par le fait qu'au réglage de l'embouchure (6, 6a. 6b) à raison de fractions de l'espacement entre des aiguilles d'impression (2) se succédant dans une colonne d'aiguilles (1), c'est-à-dire à une division mécanique plus fine de la matrice en hauteur de signe (3a), est combinée en même temps une division électronique plus fine de la matrice en largeur de signe (3), le rapport de la division en hauteur de signe et en largeur de signe pour l'écriture de qualité étant chaque fois d'au moins 0,4 : 1 ou plus grand.
2. Imprimante matricielle selon la revendication 1. caractérisée par le fait qu'avec une embouchure (6a, 6b) en au moins deux parties, avec deux colonnes d'aiguilles (1), l'affinage de la matrice est effectué de 9 x 7 à 18 x 28.18 x 40 ou 36 x 40.
3. Tête d'impression à aiguilles pour imprimante matricielle selon les revendications 1 et 2, caractérisée par le fait que l'embouchure réglable (6) est reliée à un organe (12) transmettant la force d'entraînement de réglage et que cet organe (12) est adjoint à l'entraînement de réglage (10) directement ou avec interposition d'un organe intermédiaire (21).
4. Tête d'impression à aiguilles selon la revendication 3. caractérisée par le fait que l'organe (12) transmettant la force d'entraînement de réglage. éventuellement l'organe intermédiaire (21) et le ou les entraînements de réglage (10) sont disposés dans la région antérieure (9) de la tête d'impression et sont enfermés par un carter (11
5. Tête d'impression à aiguilles selon les revendications 3 et 4, caractérisée par le fait que l'organe (12) transmettant la force d'entraînement de réglage est formé d'un levier pivotant (13) montré sur un bâti principal de tête d'impression (4) et muni de surfaces polaires (13a. 13b) qui sont placées en face des pôles (14a. 14b) d'un aimant (14) pouvant être branché et débranché.
6. Tête d'impression à aiguilles selon les revendications 3 et 4, caractérisée par le fait que l'organe (12) transmettant la force d'entraînement de réglage est formé d'un arbre (20) monté de manière à pouvoir tourner sur le bâti principal de tête d'impression (4) et qui porte l'élément intermédiaire (21) qui est disposé, par des surfaces polaires (22a. 22b) tournées à l'oppose l'une de l'autre. en face des pôles magnétiques (23a. 24a) de deux aimants (23, 24) adjoints l'un à autre. l'arbre (20) étant relié, au moyen d'un tringlage en parallélogramme (19), à deux embouchures (6a. 6b).
7. Tête d'impression à aiguilles selon les revendications 3 à 6, caractérisée par le fait que l'entraînement de réglage (10) est formé d'un ou de deux électro-aimants (14. 23. 24).
8. Tête d'impression à aiguilles selon les revendications 3 à 6, caractérisée par le fait que l'organe intermédiaire (21) est constitué sous la forme d'un balancier (21a) (Fig. 7a et 8).
9. Tête d'impression à aiguilles selon les revendications 3 à 6, caractérisée par le fait que l'organe intermédiaire (21) est constitué sous la forme d'une aiguille (21 b) (Fig. 9a).
10. Tête d'impression à aiguilles selon les revendications 3 et 4, caractérisée par le fait que l'organe (12) relié à l'embouchure (6) s'étend à peu près dans la direction du faisceau d'aiguilles et peut être réglé en va-et-vient, au moyen de l'entraînement de réglage (10), transversalement à la direction de vol des aiguilles d'impression (2). à raison d'une fraction ou d'un multiple d'un espacement d'aiguilles mesuré dans la direction de mouvement.
11. Tête d'impression à aiguilles selon la revendication 10, caractérisée par le fait que l'entraînement de réglage (10) pour le mouvement de réglage en va-et-vient de l'organe (12) est formé au moyen d'une tige filetée fixe axialement. dirigée transversalement à la direction de vol des aiguilles d'impression (2).
12, Tête d'impression à aiguilles selon les revendications 10 à 11, caractérisée par le fait que l'entraînement de rotation de la tige filetée est formé d'un aimant de levage disposé excentriquement par rapport à l'axe de la tige filetée et dont le noyau d'aimant est relié de façon articulée à un levier qui est lui-même relié à un corps de tige filetée.
13. Tête d'impression à aiguilles selon les revendications 10 à 12, caractérisée par le fait que le levier relié au noyau d'aimant ou au corps de tige filetée est à deux bras et qu'au deuxième bras de levier est relié un ressort de traction qui est accroché au bâti principal (4) de la tête d'impression.
14. Tête d'impression à aiguilles selon les revendications 10 à 13, caractérisée par le fait que l'aimant de levage est disposé à peu près parallèlement à l'axe longitudinal du bâti principal de tête d'impression (4), dans la région de l'embouchure (6).
15. Tête d'impression à aiguilles selon les revendications 10 à 14. caractérisée par le fait que l'organe (12) auquel est fixée l'embouchure (6) est formé d'une bande élastique.
16. Tête d'impression à aiguilles selon les revendications 10 à 15, caractérisée par le fait que la tige filetée est munie, à une extrémité libre. d'une fente de tournevis.
EP81730090A 1980-11-06 1981-09-09 Imprimante en matrice et tête d'impression à aiguilles y afférent Expired EP0052066B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803041877 DE3041877A1 (de) 1980-11-06 1980-11-06 Matrixdrucker und zugehoeriger nadeldruckkopf
DE3041877 1980-11-06

Publications (3)

Publication Number Publication Date
EP0052066A2 EP0052066A2 (fr) 1982-05-19
EP0052066A3 EP0052066A3 (en) 1983-03-09
EP0052066B1 true EP0052066B1 (fr) 1986-06-18

Family

ID=6116113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730090A Expired EP0052066B1 (fr) 1980-11-06 1981-09-09 Imprimante en matrice et tête d'impression à aiguilles y afférent

Country Status (4)

Country Link
US (1) US4929103A (fr)
EP (1) EP0052066B1 (fr)
JP (1) JPS57102370A (fr)
DE (1) DE3041877A1 (fr)

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DE3346297A1 (de) * 1983-12-19 1985-06-20 Mannesmann AG, 4000 Düsseldorf Verfahren und matrixdrucker zum verkleinern und/oder hoehenverschieben von schriftzeichen
DE3403795C2 (de) * 1984-02-01 1986-12-18 Mannesmann AG, 4000 Düsseldorf Matrixnadeldruckkopf mit einem in Spaltenrichtung verstellbaren Mundstück
US4640633A (en) * 1984-03-22 1987-02-03 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus
ATE74067T1 (de) * 1984-04-03 1992-04-15 Mannesmann Ag Matrixdruckkopf mit verstellbarer drucknadelfuehrung.
DE3412856A1 (de) * 1984-04-03 1985-10-03 Mannesmann AG, 4000 Düsseldorf Matrixdruckkopf mit verstellbarer drucknadelfuehrung
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JPH0755560B2 (ja) * 1985-05-09 1995-06-14 シャープ株式会社 インクジェットプリンタ
SE457340B (sv) * 1987-09-30 1988-12-19 Facit Ab Matrisskrivare och foerfarande foer att skriva med en matrisskrivare
WO1991004865A1 (fr) * 1989-09-29 1991-04-18 Siemens Aktiengesellschaft Dispositif d'impression en mosaïque a plusieurs tetes d'impression reglables
DE4020010A1 (de) * 1990-06-21 1992-01-09 Mannesmann Ag Matrixnadeldruckkopf
CN103481694B (zh) * 2013-08-22 2015-09-23 福建联迪商用设备有限公司 针式打印机的打印方法、设备以及针式打印机

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Also Published As

Publication number Publication date
US4929103A (en) 1990-05-29
JPS57102370A (en) 1982-06-25
DE3041877A1 (de) 1982-05-13
EP0052066A3 (en) 1983-03-09
EP0052066A2 (fr) 1982-05-19
JPH0419033B2 (fr) 1992-03-30

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