EP0075342A2 - Verschiebbarer Druckkopf - Google Patents

Verschiebbarer Druckkopf Download PDF

Info

Publication number
EP0075342A2
EP0075342A2 EP82201043A EP82201043A EP0075342A2 EP 0075342 A2 EP0075342 A2 EP 0075342A2 EP 82201043 A EP82201043 A EP 82201043A EP 82201043 A EP82201043 A EP 82201043A EP 0075342 A2 EP0075342 A2 EP 0075342A2
Authority
EP
European Patent Office
Prior art keywords
needles
recesses
parts
row
support
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
EP82201043A
Other languages
English (en)
French (fr)
Other versions
EP0075342B1 (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 direction of writing, or shift these positions between the two rows (see USA patent N ° 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 writing head according to the invention is characterized in that the two parts of the support have two faces arranged opposite one another, one of these faces having recesses parallel to each other and of substantially semi-circular section, with a radius corresponding to that of the needles and allowing the latter to slide freely, the needles of a row being placed in these recesses and retained in the latter by a hollow portion of the other part , this hollow portion having a length substantially equal to the length of this row of needles.
  • 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 in part 3.
  • the latter also carries a finger 11 intended to control its movement by compared to 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 arched 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 fast 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 produced between parts 5 and 6 of the ruby 4.
  • These means are constituted by two groups of two grooves 19, 20, 21 and 22 parallel to each other and parallel to the hollows 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 hollows 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 needles 16 and 18, increased by the expected clearance to allow the free sliding of these.
  • 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 the rods 25 and 26 against the bottom of the 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)
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 true EP0075342A2 (de) 1983-03-30
EP0075342A3 EP0075342A3 (en) 1984-03-28
EP0075342B1 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139190A1 (de) * 1983-09-14 1985-05-02 Siemens Nixdorf Informationssysteme Aktiengesellschaft Verfahren zur Herstellung einer Nadelführung für einen Nadeldruckkopf sowie nach diesem Verfahren hergestellte Nadelführung
EP0176974A3 (en) * 1984-10-05 1986-10-08 Honeywell Information Systems Italia S.P.A. Ruby and beedle guiding group for needle printing head
US4854752A (en) * 1986-03-21 1989-08-08 Hermes Precisa Internatinal S.A. Convertible print head
EP0483766A3 (en) * 1990-10-31 1993-04-14 Microlys S.P.A. Dot matrix printing head for high-definition or high-speed printing

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SG44608A1 (en) * 1992-07-21 1997-12-19 Seiko Epson Corp Impact dot printing head and impact dot printer
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139190A1 (de) * 1983-09-14 1985-05-02 Siemens Nixdorf Informationssysteme Aktiengesellschaft Verfahren zur Herstellung einer Nadelführung für einen Nadeldruckkopf sowie nach diesem Verfahren hergestellte Nadelführung
EP0176974A3 (en) * 1984-10-05 1986-10-08 Honeywell Information Systems Italia S.P.A. Ruby and beedle guiding group for needle printing head
US4854752A (en) * 1986-03-21 1989-08-08 Hermes Precisa Internatinal S.A. Convertible print head
EP0483766A3 (en) * 1990-10-31 1993-04-14 Microlys S.P.A. Dot matrix printing head for high-definition or high-speed printing

Also Published As

Publication number Publication date
JPH0229022B2 (de) 1990-06-27
EP0075342B1 (de) 1986-05-14
EP0075342A3 (en) 1984-03-28
CH644307A5 (fr) 1984-07-31
US4470713A (en) 1984-09-11
DE3271153D1 (en) 1986-06-19
JPS5862071A (ja) 1983-04-13

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