(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 |
(22) | Date of filing: 07.07.1987 |
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(84) | Designated Contracting States: | | DE FR GB |
(30) | Priority: | 08.07.1986 JP 158766/86 18.12.1986 JP 300099/86
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(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)
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(74) | Representative: SERJEANTS | | 25, The Crescent
King Street Leicester, LE1 6RX Leicester, LE1 6RX (GB) |
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(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