Title:
BALL FOR BALL−POINT PEN
Document Type and Number:
WIPO Patent Application WO/2003/041971
Kind Code:
A1
Abstract:
A ball for a ball−point pen having a plurality of holes in the surface thereof, wherein the surface of the ball is formed of the holes and a flat part without the holes, the flat part is formed of a smooth mirror surface, the holes have opening parts with a major axis of less than 10 μm, Ra, Ry, or Rz indicating the smoothness of the flat part on the surface of the ball is 0.01 μm or below, 0.08 μm or below, or 0.06 μm or below, respectively, and a boundary between the holes and the flat part is generally curved.
Inventors:
NAKATANI YASUNORI (JP)
Application Number:
PCT/JP2002/011926
Publication Date:
May 22, 2003
Filing Date:
November 15, 2002
Export Citation:
Assignee:
SAKURA COLOR PROD CORP (JP)
NAKATANI YASUNORI (JP)
NAKATANI YASUNORI (JP)
International Classes:
B43K1/08; (IPC1-7): B43K1/08
Foreign References:
| JPH10147091A | 1998-06-02 | |||
| JP2001080261A | 2001-03-27 | |||
| US6299376B1 | 2001-10-09 | |||
| JPS59135195A | 1984-08-03 | |||
| JP2001287490A | 2001-10-16 | |||
| JPH11139068A | 1999-05-25 | |||
| JPH10236063A | 1998-09-08 |
Attorney, Agent or Firm:
Miyazaki, Tadaaki (23-43 Esaka cho 1 chome Suita shi, Osaka, JP)
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