| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball-point pen tip equipped with both ink-following property and write-starting property. <P>SOLUTION: In the ball-point pen tip which holds a ball in the ball holding chamber of the tip end in a freely rotatable manner and has an ink flowing hole communicating with the inner hole of the tip rear end part at the center of the bottom wall of the ball holding chamber, the ink flowing hole is formed in a substantially polygonal cross section and ink flowing grooves which radially extend from the ink flowing hole and do not reach the inner hole of the tip rear end part are formed on each side of the ink flowing hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
