| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly pressure-resistant pen point member which does not wear out easily even when the writing pressure is repeatedly applied to the pen point. <P>SOLUTION: In the writing utensil having an elastic valve with an ink passage hole which elastically opens by the application of a pressurizing force and elastically recovers its original shape and closes by the release of the pressurizing force, interposed between an ink tank for storing an ink under a free condition and the pen point member, a harder bar-like body than the peripheral edge part of the pen point member is arranged at its core part. <P>COPYRIGHT: (C)2004,JPO |
