| (19) |
 |
|
(11) |
EP 0 121 379 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.05.1985 Bulletin 1985/18 |
| (43) |
Date of publication A2: |
|
10.10.1984 Bulletin 1984/41 |
| (22) |
Date of filing: 21.03.1984 |
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|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
30.03.1983 IT 6735383
|
| (71) |
Applicant: Ing. C. Olivetti & C., S.p.A. |
|
() |
|
| (72) |
Inventors: |
|
- Knirsch, Franco
()
- Gianolini, Giovanni
()
|
|
| |
|
| (54) |
Heat-sensitive inked element for impactless printers of thermal type |
(57) The inked element in ribbon form comprises a flexible plastics base carrier of a
thickness of from 5 to 15µ, covered with a heat-transferable coating of a thickness
of 2 to 6µ. The mixture of the coating comprises a thermoadhesive polymeric resin
and a polymeric wax compatible with the resin and with the colouring pigment, in such
a way as to permit printing on carriers of any type, having a Bendtsen roughness of
between 10 and 500 ml/min. For improved efficient in respect of a black ribbon, added
to the black is a mixture of the three complementary colours: yellow, magenta and
cyan.