| (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 |
|
|
| (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) |
|
| |
|
| (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