EP0041916A2 - Procédé et tête à imprimer pour produire des caractères imprimés d'après le procédé d'impression par matrice - Google Patents

Procédé et tête à imprimer pour produire des caractères imprimés d'après le procédé d'impression par matrice Download PDF

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Publication number
EP0041916A2
EP0041916A2 EP81730043A EP81730043A EP0041916A2 EP 0041916 A2 EP0041916 A2 EP 0041916A2 EP 81730043 A EP81730043 A EP 81730043A EP 81730043 A EP81730043 A EP 81730043A EP 0041916 A2 EP0041916 A2 EP 0041916A2
Authority
EP
European Patent Office
Prior art keywords
printing
mouthpieces
printhead
rows
needles
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
EP81730043A
Other languages
German (de)
English (en)
Other versions
EP0041916B1 (fr
EP0041916A3 (en
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0041916A2 publication Critical patent/EP0041916A2/fr
Publication of EP0041916A3 publication Critical patent/EP0041916A3/de
Application granted granted Critical
Publication of EP0041916B1 publication Critical patent/EP0041916B1/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
    • 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 method and a printhead for generating printing characters according to the matrix printing method, which is based on two or more vertical rows of printing needles which are vertically displaceable.
  • the aim of such a method is to generate printed characters at the highest possible speed. As is well known, this goal is in contrast to a clear representation of the printed sign. According to current considerations, a high printing speed can only be achieved using a large number of printing needles.
  • the object of the invention is to switch the operating mode from "quick writing” to "fine writing" within a print line, with a less obvious deterioration of the "fine writing” in "quick writing".
  • a particularly advantageous modification of the inventive concept is achieved if the numerical value of the offset during the one pressure pass is a / 2 to a / 5 and is maintained in absolute terms during the counterpressure pass.
  • the known print head is provided with a rigid and a movable row of printing needles (DE-OS 26 32 293).
  • the print head according to the invention is designed such that the rows of printing needles are mounted with their mouthpieces in separate, individually vertically adjustable guides.
  • a parallel guidance of the separately mounted mouthpieces is achieved according to further features in that the separate guides consist of paired parallel leaf springs, at the front end of which the mouthpieces are attached.
  • the drive device for the mouthpieces can be designed in different ways.
  • a particularly advantageous type is that the drive device for the mouthpieces consists of angle levers rotatably mounted on the printhead frame, which are articulated on the one hand with a mouthpiece and on the other hand with a pull magnet.
  • the printhead according to the invention allows three possible positions of the mouthpieces to be taken up by simply electrically switching an element on or off.
  • the mechanical requirements are created in such a way that several angle levers are each articulated with their free arm on a bracket, that only a part of the angle lever is driven by a pull magnet and that the driven angle levers are each connected to tension springs attached at a fixed position.
  • pull magnets are connected to the power supply of the print head.
  • connection with the pull magnet to form a structural unit.
  • the method is based on the system of the matrix printer, in which selected printing needles are activated at the same time or in succession in order to print a selected character.
  • the print head moves back to the starting position in one or more print passes over the recording medium and in a counter pressure pass (double print pass), which can be repeated one or more times over a line.
  • a multiplicity of positions of the two mouthpieces can be assumed relative to one another, the number of possibilities being able to be increased considerably by adding a third or further mouthpieces.
  • the mouthpiece 1 is offset from the mouthpiece 2 (FIG. 1) by half the distance "a" of the printing needles 3 or 4 or 5 or 6 to improve the character quality.
  • the printing needle 5 is therefore between the printing needles 3 and 4 during a pressure pass.
  • the adjusting drives 7 and 8 do not require any energy supply.
  • Such an idle state of the adjustment drives serves to generate a matrix n (x, y) in a pressure pass.
  • the mouthpiece 1 is lifted by a / 4 from the rest position before the start of the subsequent pressure yoke or before the start of the following back pressure yoke, and the mouthpiece 2 also reaches its new rest position by lifting (FIG. 2).
  • the distance between the two mouthpieces 1 and 2 is again a / 2.
  • the generated matrix n (x, y) is shifted upwards by a / 4 compared to that generated in FIG. 1. This process represents the second pass (return) of the double pass printing; both pressure passes together result in the matrix 2 n (x, y).
  • the invention makes it possible to move one of two (or more than two) mouthpieces per pressure passport, so that, where appropriate, the mouthpieces 1, 2 continuously swing up and down.
  • the positions of the rows of printing needles 3, 4 and 5, 6 can be varied. So z. B. in double pass printing in the first print pass the distance a / 4 and in the second 3a / 4 to increase the quality of the print even further.
  • the rows of printing needles include e.g. B. 7 and 7 printing needles, with which a 14 by 50 matrix and a 28 by 50 matrix for a double pass can be generated due to the one printhead.
  • the design of the print head corresponds to the existing mouthpieces 1 and 2, which are held in guides 10 and 11. 4, the guides consist of paired parallel leaf springs 10a, 10b and 11a, 11b, at the front ends 12a and 13a of which the mouthpieces 1, 2 are fastened.
  • the pressure needles 3, 4 run in tube guides 14 between the leaf springs 10a, 10b, 11a, 11b.
  • the rear ends of the leaf springs 10a, 10b and 11a, 11b are connected to the print head frame (not shown in more detail).
  • the drive device 15 for the mouthpieces 1 and 2 are shown in the embodiment of Figure 5.
  • the angle levers 16, 17 and 18 are rotatably supported by means of axes 19 on a component of the printhead frame.
  • At one lever arm 16a or 18a there is a connection 20 to the projection 21, which is part of the mouthpieces 1 and 2, respectively.
  • the adjusting drives 7 and 8 act on the other, free lever arm 16b and 17a and 18b in the form of pull magnets 22 and 23.
  • the free arms 16b, 17a and 18b of the angle lever are in the normal position of the mouthpieces 1 and 2 by means of tension springs 29 and 30 in a desired starting position, for. B. in the normal position shown in FIG. 3, the stops 26, 27 and 28 can be adjustable.
  • the energization of the pull magnets 22 and 23 effects the position of the mouthpieces 1 and 2 according to FIG. 2, the pivoting of the levers 16 and 17 by different amounts likewise resulting in different adjustments of the mouthpieces 1 and 2.
EP81730043A 1980-06-10 1981-04-09 Procédé et tête à imprimer pour produire des caractères imprimés d'après le procédé d'impression par matrice Expired EP0041916B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3022128A DE3022128C2 (de) 1980-06-10 1980-06-10 Druckkopf zum Erzeugen von Druckzeichen nach dem Matrix-Druckverfahren
DE3022128 1980-06-10

Publications (3)

Publication Number Publication Date
EP0041916A2 true EP0041916A2 (fr) 1981-12-16
EP0041916A3 EP0041916A3 (en) 1982-11-03
EP0041916B1 EP0041916B1 (fr) 1986-02-26

Family

ID=6104485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730043A Expired EP0041916B1 (fr) 1980-06-10 1981-04-09 Procédé et tête à imprimer pour produire des caractères imprimés d'après le procédé d'impression par matrice

Country Status (4)

Country Link
US (1) US4400101A (fr)
EP (1) EP0041916B1 (fr)
JP (1) JPS5727766A (fr)
DE (1) DE3022128C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052066A2 (fr) * 1980-11-06 1982-05-19 MANNESMANN Aktiengesellschaft Imprimante en matrice et tête d'impression à aiguilles y afférent

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59101368A (ja) * 1982-12-01 1984-06-11 Canon Inc プリンタ付計算機
DE3333252C2 (de) * 1983-09-14 1986-02-13 Nixdorf Computer Ag, 4790 Paderborn Verfahren zur Herstellung eines Nadeldruckkopfes
DE3412856A1 (de) * 1984-04-03 1985-10-03 Mannesmann AG, 4000 Düsseldorf Matrixdruckkopf mit verstellbarer drucknadelfuehrung
US4605323A (en) * 1985-07-02 1986-08-12 At&T Teletype Corporation Dual quality wire matrix print head
CH667618A5 (fr) * 1986-03-21 1988-10-31 Hermes Precisa International Tete d'ecriture commutable.
DE3736334A1 (de) * 1986-10-27 1988-05-05 Minolta Camera Kk Druckgeraet
US4860036A (en) * 1988-07-29 1989-08-22 Xerox Corporation Direct electrostatic printer (DEP) and printhead structure therefor
JP2890542B2 (ja) * 1989-10-26 1999-05-17 セイコーエプソン株式会社 シリアルプリンタ用ドット型印字ヘッド
US5241325A (en) * 1991-10-31 1993-08-31 Hewlett-Packard Company Print cartridge cam actuator linkage
US5880757A (en) * 1991-11-04 1999-03-09 Hewlett-Packard Company Print resolution enhancement by adjusting printhead position
EP0540987B1 (fr) * 1991-11-04 1996-03-27 Hewlett-Packard Company Imprimante/tracteur à grande portée utilisant plusieurs cartouches d'écriture
JP3205082B2 (ja) * 1992-10-13 2001-09-04 キヤノン株式会社 画像形成方法及び装置
US7448734B2 (en) * 2004-01-21 2008-11-11 Silverbrook Research Pty Ltd Inkjet printer cartridge with pagewidth printhead
KR100677579B1 (ko) * 2005-04-26 2007-02-02 삼성전자주식회사 잉크젯 화상형성장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2632293A1 (de) * 1975-08-01 1977-02-17 Ibm Druckkopf fuer matrixdrahtdrucker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1364646A (en) * 1971-10-07 1974-08-29 Creed Co Ltd Printed telegraph machine
DE2535699C3 (de) * 1975-08-09 1978-12-14 Olympia Werke Ag, 2940 Wilhelmshaven Verfahren und Drucker zur Herstellung von feingerasterten Schriftzeichen auf einem Aufzeichnungsträger
US4159882A (en) * 1977-06-30 1979-07-03 R. C. Sanders Technology Systems, Inc. High quality printer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2632293A1 (de) * 1975-08-01 1977-02-17 Ibm Druckkopf fuer matrixdrahtdrucker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052066A2 (fr) * 1980-11-06 1982-05-19 MANNESMANN Aktiengesellschaft Imprimante en matrice et tête d'impression à aiguilles y afférent
EP0052066B1 (fr) * 1980-11-06 1986-06-18 MANNESMANN Aktiengesellschaft Imprimante en matrice et tête d'impression à aiguilles y afférent

Also Published As

Publication number Publication date
DE3022128A1 (de) 1981-12-17
JPS5727766A (en) 1982-02-15
US4400101A (en) 1983-08-23
EP0041916B1 (fr) 1986-02-26
DE3022128C2 (de) 1983-12-08
EP0041916A3 (en) 1982-11-03

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