EP0104260A1 - Draht für punktdrucker - Google Patents

Draht für punktdrucker Download PDF

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Publication number
EP0104260A1
EP0104260A1 EP83901099A EP83901099A EP0104260A1 EP 0104260 A1 EP0104260 A1 EP 0104260A1 EP 83901099 A EP83901099 A EP 83901099A EP 83901099 A EP83901099 A EP 83901099A EP 0104260 A1 EP0104260 A1 EP 0104260A1
Authority
EP
European Patent Office
Prior art keywords
wire
dot printer
coating film
hard coating
leaf spring
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.)
Pending
Application number
EP83901099A
Other languages
English (en)
French (fr)
Other versions
EP0104260A4 (de
Inventor
Masahiko Sakakibara
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Publication of EP0104260A1 publication Critical patent/EP0104260A1/de
Publication of EP0104260A4 publication Critical patent/EP0104260A4/de
Pending 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
    • 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

Definitions

  • the present invention relates to an improvement in wire for use in dot printer and, more particularly, to an improvement in the wear resistance of such wire.
  • Figs. 1 and 2 show an example of printhead for dot printer which is presently used ordinarily. More specifically, Fig. 1 is a sectional view, while Fig. 2 is an exploded perspective view of the printhead.
  • a reference numeral 1 denotes a first plate forming a common magnetic path
  • 2 denotes a plurality of cores fixed to the plate
  • 3 denotes a ring-shaped permanent magnet fixed to the plate
  • 4 denotes magnet coils fitted to respective cores
  • 5 denotes a second plate forming a common magnetic path and provided with holes 5a at positions corresponding to the cores
  • 6 denotes a spacer
  • 7 denotes a leaf spring having one end connected in a ring-like form and having holes 7a corresponding to the holes 5a of the second plate 5 and slitted at the end 7b into sections which are deflectable independently
  • 8 denotes a wire fixed to the end 7b of the leaf spring 7 by, for example, brazing
  • 9 denotes armature pins fitted in the holes 7a in the leaf spring 7 and opposing to the holes 5a in the plate 5 and also to the cores
  • 10 denotes a guide frame
  • 11 denotes a pin guide
  • a plurality of wires are guided by the pin guide 11 and the arrayed substantially in a linear line.
  • the base end portions of the wires fixed to the leaf spring 7 are arranged substantially along an oval line, so that the wire is obliged to be slightly inclined to the print surface when printing.
  • a local wear of the wire end surface inevitably takes place as a result of repeated printing action,. resulting in a vagueness of the printed characters.
  • the present invention aims as its major object at providing a wire for use in dot printer having a superior impact strength and exhibiting a high resistance to local wear.
  • a wire for use in dot printer having a base member constituted by a metallic material and a hard coating film of ceramics on the base member so that a high toughness and small local wear are ensured by the toughness inherent in the metallic material and high wear resistance peculiar to the ceramics material.
  • the material of the wire for use in dot printer various materials known as the material of the wire for use in dot printer, such as high-speed tool steel, die steel, other tool steels, tungsten steel, piano wire and so forth.
  • the high-speed tool steel can be used most suitably as the material of the base member of the wire for use in dot printer of the invention, because it exhibits a high flexural toughness and large deflective strength, as well as good brazing characteristic.
  • the hard coating film it is possible to use various coating materials known as hard coating materials, such as carbides, nitrides, borides, oxides, carbonitrides and other compounds of various metallic elements.
  • hard coating materials such as carbides, nitrides, borides, oxides, carbonitrides and other compounds of various metallic elements.
  • a good results is obtained particularly when ceramics coating film such as of TiC, TiN, TiCN, TiB 2 , VC, Al 2 0 3 and the like are used.
  • the thickness of the coating As to the thickness of the coating, an appreciable effect is obtained even when the coating film thickness is less than 1 ⁇ m, but since a better property is obtained when the coating film thickness is in a range between 1 and 10 pm, the thickness in this range is preferable.
  • the structure of the coating film is selector in accordance with the materials of the base member and the coating film, it is needless to say that the coating film may be composed of a single layer or a multiplicity of layers.
  • the adhesion or affinity between the base member and the coating film is a matter of great significance. Therefore, the coating film is made preferably by chemical deposition method (CVD method), molten salt method, ion-plating method or the like.
  • a wire for use in dot printer made from a high-speed tool steel was cleaned and sufficiently degreased in a triqhlene bath under application of a ultrasonic cleaning.
  • the wire thus treated was placed in an ion-plating apparatus.
  • metallic Ti having purity of 99.9 % or higher as the evaporation material was set in the same.
  • the vacuum was decreased to 5 x 10 -4 Torr by introduction of argon gas and then to 1 x 10 -3 Torr by introduction of nitrogen gas.
  • Fig. 3 shows a microscopic photo of the cross- section of the coating film of this wire for use in dot printer. From this Figure, it will be seen that the coating film covers the base member with a high affinity or adhesion.
  • Table 1 shows the properties of the wire for use in dot printer of the invention in comparison with those of the conventional wire for use in dot printer.
  • the invention provides a distinctive effect in improving the wear resistance of the wire for use in dot printer.
  • the wire in accordance with the invention showed a good brazing characteristic, so that it could be fixed to the leaf spring easily and securely.
  • the invention makes it possible to provide a wire for use in dot printer which can stand much longer use than the conventionally used wire for use in dot printer.
  • the invention offers a great advantage from the industrial point of view.

Landscapes

  • Impact Printers (AREA)
EP19830901099 1982-04-01 1983-03-31 Draht für punktdrucker. Pending EP0104260A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP54082/82 1982-04-01
JP5408282A JPS58193166A (ja) 1982-04-01 1982-04-01 ドツトプリンタ−用ワイヤ−

Publications (2)

Publication Number Publication Date
EP0104260A1 true EP0104260A1 (de) 1984-04-04
EP0104260A4 EP0104260A4 (de) 1986-02-10

Family

ID=12960690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901099 Pending EP0104260A4 (de) 1982-04-01 1983-03-31 Draht für punktdrucker.

Country Status (3)

Country Link
EP (1) EP0104260A4 (de)
JP (1) JPS58193166A (de)
WO (1) WO1983003385A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274117A2 (de) * 1987-01-09 1988-07-13 Lexmark International, Inc. Druckkopf mit einem einteiligen Anker

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157237U (ja) * 1984-03-30 1985-10-19 ぺんてる株式会社 生インキ式ワイヤ−ドツトプリンタ用ヘツドのワイヤ−
JPS6181946U (de) * 1984-11-02 1986-05-30
JPS61172760A (ja) * 1985-01-25 1986-08-04 Hitachi Koki Co Ltd 印字ハンマ
JPS61133337U (de) * 1985-02-06 1986-08-20
JPS62154937U (de) * 1986-03-26 1987-10-01
JPS6430237U (de) * 1987-08-18 1989-02-23
JPH0379351A (ja) * 1989-08-22 1991-04-04 Kanai Hiroyuki ドットプリンタ用印字ワイヤ
JPH04371853A (ja) * 1991-06-18 1992-12-24 Internatl Business Mach Corp <Ibm> 印字用ワイヤー及びその製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5296119A (en) * 1976-02-04 1977-08-12 Brother Ind Ltd Type wire for wire printer
JPS5438238A (en) * 1977-08-31 1979-03-22 Pilot Pen Co Ltd Printing wire for dot printer and method of making same
JPS5725972A (en) * 1980-07-23 1982-02-10 Nippon Telegr & Teleph Corp <Ntt> Printing wire of wire dot printer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No relevant documents have been disclosed *
See also references of WO8303385A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274117A2 (de) * 1987-01-09 1988-07-13 Lexmark International, Inc. Druckkopf mit einem einteiligen Anker
EP0274117A3 (en) * 1987-01-09 1989-01-04 International Business Machines Corporation Print head incorporating a one piece armature

Also Published As

Publication number Publication date
WO1983003385A1 (en) 1983-10-13
JPS58193166A (ja) 1983-11-10
EP0104260A4 (de) 1986-02-10

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19831222

AK Designated contracting states

Designated state(s): DE FR GB

A4 Supplementary search report drawn up and despatched

Effective date: 19860210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SAKAKIBARA, MASAHIKO