| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means capable of preventing a ball surface from corroding even if the pen top of a ballpoint pen filled with ink to which an oxygen scavenger is added is blocked by a pen top sealing member, in the ballpoint pen in which a cemented carbide ball is used. <P>SOLUTION: The ballpoint is manufactured by adding the oxygen scavenger formed of the same material of an equal molar quantity to both of at least ink and a pen top sealing member. <P>COPYRIGHT: (C)2012,JPO&INPIT |
