| 摘要 |
<p>A ball-point pen adapted to use an aqueous solution based low viscosity ink is uneffected by foreign substances involved around the ball during pen writing. The ball-point pen includes a hollow pen shaft, a pen tip section inserted in the pen shaft and composed of a ball retaining portion, an ink guide portion, and an ink guide stem retaining portion. The ink guide portion has a relatively large diameter central bore connecting the ball retaining portion and the ink guide stem retaining portion and a plurality of radially extending narrow width ink guide grooves for capillary action. The ink guide stem retaining portion is charged with a porous ink guide stem having its tip end extending into the rear end of the ink guide grooves and its rear end extending into an inkholder contained in the pen shaft.</p> |
