| (19) |
 |
|
(11) |
EP 0 715 964 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.07.1996 Bulletin 1996/28 |
| (43) |
Date of publication A2: |
|
12.06.1996 Bulletin 1996/24 |
| (22) |
Date of filing: 14.06.1995 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL |
| (30) |
Priority: |
09.12.1994 JP 331852/94
14.12.1994 US 355974
|
| (71) |
Applicant: Ricoh Company, Ltd |
|
Ota-ku
Tokyo 143 (JP) |
|
| (72) |
Inventor: |
|
- Goto, Hiroshi
Fuji-shi,
Shizuoka-ken (JP)
|
| (74) |
Representative: Barz, Peter, Dr. et al |
|
Patentanwalt
Kaiserplatz 2
80803 München
80803 München (DE) |
|
| |
|
| (54) |
Thermosensible recording medium |
(57) A thermosensible recording layer is provided on a carrier body and is mainly composed
of electron donative coloration compound, and electron acceptor compound, together
with binder resin. The thermosensible recording medium includes 500 through 5,000
ppm of organic solvent, and the organic solvent has a dielectric constant of 2.0 through
25.0 at 20°C, and has a vapor pressure of 10 through 200 mmHg at 20°C. A protective
layer is provided on the thermosensible recording layer. The organic solvent is included
in the thermosensible layer and the protective layer.