| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a writing instrument which suppresses ink flowing out of a valve mechanism even while an operation for discharging the ink is kept, to suppress the dripping of the ink due to excessive discharging from a pen nib. <P>SOLUTION: A valve mechanism for releasing an ink path with a predetermined pressure and closing the passage of the ink through the ink path when the pressure is released is provided on an ink feed port to the pen nib on an ink tank whose capacity can be manipulatively varied. <P>COPYRIGHT: (C)2004,JPO |
