| (19) |
 |
|
(11) |
EP 0 364 653 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
06.02.1991 Bulletin 1991/06 |
| (43) |
Date of publication A2: |
|
25.04.1990 Bulletin 1990/17 |
| (22) |
Date of filing: 21.02.1989 |
|
| (51) |
International Patent Classification (IPC)5: B41N 7/06 |
|
| (84) |
Designated Contracting States: |
|
AT CH DE FR GB IT LI |
| (30) |
Priority: |
30.09.1988 JP 246587/88
|
| (71) |
Applicant: KABUSHIKI KAISHA TOKYO KIKAI SEISAKUSHO |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Shiba, Noriyuki
Tokyo (JP)
- Okamura, Yuichi
Tokyo (JP)
|
| (74) |
Representative: Müller-Boré & Partner
Patentanwälte |
|
Grafinger Strasse 2
81671 München
81671 München (DE) |
|
| |
|
| (54) |
Inking cylinder used in a printing apparatus and method for producing the inking cylinder |
(57) An inking cylinder adapted for a keyless inking system of a printing apparatus comprises
a cylindrical base mumber, and an ink receiving layer covered over the surface of
the cylindrical base member. The ink receiving layer is composed of a flexible substrate
and many fine spherical members (and hard material powder) uniformly dispersed in
the flexible substrate. External shell of each the fine spherical members is partially
ruptured by grinding force and its hollow interior is opened. The ink on the cylinder
surface is caught by this opened hollow interior of each the fine spherical members.
A method for producing the above inking cylinder comprises a a first step for uniformly
dispersing fine spherical members (and hard material powder) in a substrate, a second
step for covering the substrate dispersed with the fine spherical members on a surface
of a cylindrical base member to form an ink receiving layer on the base member, and
a third step for grinding the surface of the ink receiving layer so that the fine
spherical members in the surface region are partially grinded and their shells are
ruptured to open the hollow interior of the fine spherical members.
