EP0075342B1 - Verschiebbarer Druckkopf - Google Patents

Verschiebbarer Druckkopf Download PDF

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Publication number
EP0075342B1
EP0075342B1 EP82201043A EP82201043A EP0075342B1 EP 0075342 B1 EP0075342 B1 EP 0075342B1 EP 82201043 A EP82201043 A EP 82201043A EP 82201043 A EP82201043 A EP 82201043A EP 0075342 B1 EP0075342 B1 EP 0075342B1
Authority
EP
European Patent Office
Prior art keywords
needles
recesses
parts
parallel
faces
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
EP82201043A
Other languages
English (en)
French (fr)
Other versions
EP0075342A2 (de
EP0075342A3 (en
Inventor
Stéphane Rossopoulos
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.)
Cessione precisa Sa
Original Assignee
Hermes Precisa International SA
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 Hermes Precisa International SA filed Critical Hermes Precisa International SA
Publication of EP0075342A2 publication Critical patent/EP0075342A2/de
Publication of EP0075342A3 publication Critical patent/EP0075342A3/fr
Application granted granted Critical
Publication of EP0075342B1 publication Critical patent/EP0075342B1/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
    • 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

  • Switchable needle writing heads comprising at least two rows of needles, these needles being slidably mounted in guide paths in a support in two parts, these rows being arranged substantially vertically with respect to the direction d writing a line by the head, means allowing at will to produce a relative displacement between the two parts of the support to align the positions of the needles of one row relative to the positions of the needles of another row parallel to the writing direction, or shift these positions between the two rows (see patent USA-A-4,010,835).
  • the object of the present invention is to provide a needle head of this type, the construction of which is very precise while being simple to produce.
  • the object is achieved by means of the writing head defined in claim 1.
  • the writing head shown comprises a support 1 formed by two parts 2 and 3, the part 2 being integral with the writing head which is not shown, because it is well known in itself.
  • Part 3 is slidably mounted on part 2.
  • This support has guide paths for two rows of needles, these paths being produced in an industrial ruby 4 which is shown on a larger scale in FIG. 3 and which comprises a fixed part 5 and a mobile part 6, the latter being mounted on the sliding part 3.
  • Part 3 is guided on part 2 by two tabs 7 and 8 of part 2, which are engaged in two recesses 9 and 10 of part 3.
  • the latter also carries a finger 11 intended to control its movement relative to in part 2.
  • the part 5 of the ruby 4 is itself made up of two parts 12 and 13 assembled by gluing 14.
  • Piece 5 has a series of nine parallel recesses 15 of substantially semi-circular section and constituting guide paths for the needles 16 of a first row of needles.
  • the part 13 also has a series of parallel recesses 17 arranged opposite the recesses 15, the section of which is arcuate so as to match the circular section of the needles 16, while leaving a play of a few hundredths of a millimeter to allow free sliding of the needles 16 in their respective guide paths.
  • Guide paths are provided between the part 13 and the part 3 to receive a second row of needles 18.
  • the needles of this second row can be moved vertically as a block with reference to FIG. 3 to be moved so as to be offset relative to the needles 16 of the first row, taking account of the writing direction A.
  • the needles 18 can be brought into a position aligned with the needles 16 in the direction A.
  • a rapid writing position is obtained when the needles 16 and 18 are aligned, since it is possible on the same line to carry out per unit of time, a double number of stitches than in the case where there is only one row of needles.
  • the writing speed remains the same as if there was only one row of needles, but the quality is better since it is possible to obtain an overlap points drawn by the needles and therefore to make continuous lines.
  • the two respective positions between parts 2 and 3 of the support are fixed by notching means made between parts 5 and 6 of the ruby 4.
  • These means are constituted by two groups and two grooves 19, 20, 21 and 22 parallel to each other and parallel to the recesses 15.
  • the bottoms of the grooves 19 and 20 and respectively 21 and 22 are spaced from each other by a value equal to half the spacing between the axes of the recesses 15.
  • Each group of two grooves is arranged opposite a groove 23, respectively 24, substantially semi-circular, of the same radius as that of the recesses 15 and serving as a housing for a rod 25, respectively 26.
  • These rods are glued in the grooves 23 and 24 and have a diameter corresponding to that of the needles 16 and 18, increased by the clearance provided to allow the latter to slide freely.
  • part 3 of the support is biased towards part 5 of the ruby by a leaf spring 27 bearing against a boss 28 of part 3 and whose free ends are supported in housings 29 and 30. The action of this spring pushes rods 25 and 26 against the bottom of grooves 19 to 22.
  • the writing head In needle printers, it is usual for the writing head to move along a cylinder on which the writing sheet is placed, this movement being limited at each of its ends by stops fixing the line margins of writings. This arrangement can be used to place the mobile row comprising the needles 18.
  • the means of displacement and notching of the part 3 can be varied to a great extent, the displacements of the mobile part 3 can for example be controlled by an electromagnet fixed on the writing head.

Landscapes

  • Impact Printers (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Claims (4)

1. Verschiebbarer Nadeldruckkopf, der zumindest zwei Nadelreihen (16, 18) aufweist, wobei diese Nadeln gleitend in Führungsgängen (15, 17) in einem aus zumindest zwei Teilen (5, 6) bestehenden Träger gelagert sind, wobei diese Reihen annähernd vertikal zur Schreibrichtung einer Linie vom Kopf angeordnet sind, und wobei Mittel (11) es nach Belieben erlauben, eine relative Verschiebung zwischen zumindest zwei Teilen des Trägers zu erzeugen, um die Lagen der Nadeln (16) einer Reihe gegenüber der Lagen der Nadeln (18) einer anderen Reihe parallel zur Schreibrichtung auszurichten, oder diese Lagen der zwei Reihen zu versetzen, dadurch gekennzeichnet, dass die zwei Teile (5, 6) des Trägers zwei sich gegenüberliegende Seiten aufweisen, wobei die eine dieser Seiten eine erste Serie von unter sich parallelen Vertiefungen (15) mit halbkreisförmigem Querschnitt aufweist, deren Radius dem der Nadeln entspricht und den letzteren erlaubt, frei zu gleiten, wobei die Nadeln (18) einer Reihe in diesen Vertiefungen gelagert sind und in diesen durch eine zweite Serie von im anderen, dem ersten Teil gegenüberliegenden Teil angeordneten parallelen Vertiefungen gehalten werden, und wobei diese zweite Serie sich über eine Länge erstreckt, die annähernd gleich der Länge dieser Nadelreihe ist.
2. Druckkopf gemäss Anspruch 1, dadurch gekennzeichnet, dass die zwei Teile (5, 6) des Trägers mittels zumindest einer Feder (27) gegeneinander gespannt sind, die anstrebt, die benannten Seiten gegeneinander zu drücken, wobei Einrastungsmittel (19 bis 26) zwischen den beiden Seiten vorgesehen sind, um die beiden Arbeitslagen festzulegen.
3. Druckkopf gemäss Anspruch 2, dadurch gekennzeichnet, dass die Einrastungsmittel (19 bis 26) aus zwei Gruppen von zwei unter sich parallelen und mit den Vertiefungen (15) parallelen Rillen (19 bis 22) besteht, wobei die tiefsten Stellen der Rillen einer Gruppe durch eine Distanz getrennt sind, deren Wert gleich dem Halbabstand zwischen den Achsen der halbkreisförmigen Vertiefungen ist, wobei jede der aus zwei Rillen (19 bis 22) bestehenden Gruppen gegenüber einer Rille (23, 24) von annähernd halbkreisförmigem Querschnitt und von gleichem Radius wie die Vertiefungen (15) angeordnet ist, und wobei ein Stift (25, 26) in jeder Rille (23, 24) mit halbkreisförmigem Querschnitt gleagert ist, welcher Stift einen Durchmesser aufweist, der dem der Nadeln (18), vergrössert durch das für das freie Gleiten der Nadeln notwendige Spiel, entspricht.
4. Druckkopf gemäss Anspruch 3, dadurch gekennzeichnet, dass der Träger von einem Rubin (4) gebildet ist und aus drei Teilen (12, 13, 6) besteht, von denen zwei (12, 13) fest zusammengehalten sind und zwei sich gegenüberliegende Seiten aufweisen, wobei beide der zwei Seiten unter sich parallele Vertiefungen (15, 17) aufweisen, deren halbkreisförmiger Querschnitt dieselbe Grösse hat wie die auf einer Seite der zwei gegeneinander beweglichen Teile (13, 6) vorgesehenen Vertiefungen.
EP82201043A 1981-09-18 1982-08-19 Verschiebbarer Druckkopf Expired EP0075342B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH603881A CH644307A5 (fr) 1981-09-18 1981-09-18 Tete d'ecriture commutable.
CH6038/81 1981-09-18

Publications (3)

Publication Number Publication Date
EP0075342A2 EP0075342A2 (de) 1983-03-30
EP0075342A3 EP0075342A3 (en) 1984-03-28
EP0075342B1 true EP0075342B1 (de) 1986-05-14

Family

ID=4303227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82201043A Expired EP0075342B1 (de) 1981-09-18 1982-08-19 Verschiebbarer Druckkopf

Country Status (5)

Country Link
US (1) US4470713A (de)
EP (1) EP0075342B1 (de)
JP (1) JPS5862071A (de)
CH (1) CH644307A5 (de)
DE (1) DE3271153D1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333252C2 (de) * 1983-09-14 1986-02-13 Nixdorf Computer Ag, 4790 Paderborn Verfahren zur Herstellung eines Nadeldruckkopfes
IT1176859B (it) * 1984-10-05 1987-08-18 Honeywell Inf Systems Rubino e gruppo guida aghi per testina stampante ad aghi
CH667618A5 (fr) * 1986-03-21 1988-10-31 Hermes Precisa International Tete d'ecriture commutable.
IT1247770B (it) * 1990-10-31 1994-12-30 Microlys Spa Testa di stampa a matrice di punti per stampa ad alta definizione o ad alta velocita'
US5880757A (en) * 1991-11-04 1999-03-09 Hewlett-Packard Company Print resolution enhancement by adjusting printhead position
JP2522231B2 (ja) * 1991-11-15 1996-08-07 株式会社精工舎 印字モ―ドを切換え可能なワイヤドットプリンタ
EP0580426B1 (de) * 1992-07-21 1998-09-16 Seiko Epson Corporation Punktdruckkopf für Anschlagdrucker und Anschlagpunktdrucker
JP2560681B2 (ja) * 1992-09-18 1996-12-04 セイコープレシジョン株式会社 印字モードを切換え可能なワイヤドットプリンタ
US5793392A (en) * 1995-06-13 1998-08-11 Tschida; Mark J. Printing apparatus and method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071162A5 (de) * 1969-12-19 1971-09-17 Radiotechnique Compelec
US3833105A (en) * 1970-05-15 1974-09-03 Centronics Data Computer Printer head assembly
US3625142A (en) * 1970-06-10 1971-12-07 Datascript Terminal Equipment High-speed printing apparatus having slidably mounted character-forming elements forming a dot matrix
GB1364646A (en) * 1971-10-07 1974-08-29 Creed Co Ltd Printed telegraph machine
DE2436970A1 (de) * 1974-07-31 1976-02-19 Siemens Ag Vorrichtung in mosaiknadeldruckkoepfen zum fuehren der druckernadeln
US4010835A (en) * 1975-08-01 1977-03-08 International Business Machines Corporation Matrix print head
DD128153A1 (de) * 1976-08-26 1977-11-02 Volker Flechtner Mosaikdruckkopf
SE408034B (sv) * 1977-03-15 1979-05-14 Philips Svenska Ab Lageranordning vid ett mosaiktryckhuvud
US4236836A (en) * 1979-03-30 1980-12-02 Teletype Corporation Dot impact printer and actuator therefor
DE3041877A1 (de) * 1980-11-06 1982-05-13 Mannesmann AG, 4000 Düsseldorf Matrixdrucker und zugehoeriger nadeldruckkopf

Also Published As

Publication number Publication date
JPS5862071A (ja) 1983-04-13
CH644307A5 (fr) 1984-07-31
EP0075342A2 (de) 1983-03-30
DE3271153D1 (en) 1986-06-19
JPH0229022B2 (de) 1990-06-27
EP0075342A3 (en) 1984-03-28
US4470713A (en) 1984-09-11

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