| (19) |
 |
|
(11) |
EP 0 747 223 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.03.1998 Bulletin 1998/10 |
| (43) |
Date of publication A2: |
|
11.12.1996 Bulletin 1996/50 |
| (22) |
Date of filing: 04.06.1996 |
|
| (51) |
International Patent Classification (IPC)6: B41J 2/175 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
06.06.1995 US 469099
|
| (71) |
Applicant: LEXMARK INTERNATIONAL, INC. |
|
Greenwich,
Connecticut 06836 (US) |
|
| (72) |
Inventors: |
|
- Elbert, Donald L.
Lexington,
Kentucky 40502 (US)
- Murthy, Ashok
Lexington,
Kentucky 40515-1202 (US)
|
| (74) |
Representative: Skailes, Humphrey John |
|
Frank B. Dehn & Co.,
European Patent Attorneys,
179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB) |
|
| |
|
| (54) |
Ink reservoir with coated open-cell foam |
(57) A thermal ink jet printhead cartridge employs open-cell malamine-formaldehyde foam
in its ink reservoir. This foam is precoated with unsubstituted polyparaxylylene or
polychloroparaxylylene to immobilize loose fiber and thereby prevent nozzle blockage.