(19)
(11)EP 0 252 722 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
22.03.1989 Bulletin 1989/12

(43)Date of publication A2:
13.01.1988 Bulletin 1988/02

(21)Application number: 87306003.2

(22)Date of filing:  07.07.1987
(51)International Patent Classification (IPC)4B41J 2/25, C22C 29/08
(84)Designated Contracting States:
DE FR GB

(30)Priority: 08.07.1986 JP 158766/86
18.12.1986 JP 300099/86

(71)Applicant: Oki Electric Industry Company, Limited
Tokyo 105 (JP)

(72)Inventors:
  • Omori, Yasuo Oki Electric Industry Co. Ltd.
    Tokyo (JP)
  • Hashimoto, Iwao Oki Electric Industry Co. Ltd.
    Tokyo (JP)
  • Andou, Hirokazu Oki Electric Industry Co. Ltd.
    Tokyo (JP)
  • Shino, Masakazu Oki Electric Industry Co. Ltd.
    Tokyo (JP)

(74)Representative: SERJEANTS 
25, The Crescent King Street
Leicester, LE1 6RX
Leicester, LE1 6RX (GB)


(56)References cited: : 
  
      


    (54)Wire-dot print head and wire therefor


    (57) In a wire-dot print head comprising a plurality of wires, an arbitrary subset of which can be driven to print a desired pattern of dots. the wire material is a superhard corrosion-resistant tungsten-carbide-cobalt (WC-Co) alloy with a chromium concentration ratio of 0.004 to 0.2





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