| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide writing utensils that can surely prevent ink leakage from a pen point by eliminating rolling in of air, that has no dust generated in the pen point, and that facilitates exchange of an ink tank as well as confirmation of a remaining quantity through flexibility of the ink tank. <P>SOLUTION: An ink feeding mechanism 14 has, in a cylindrical storing shaft 20, a storing space 16 for temporarily holding ink made to flow in from the ink tank 12 and a valve body 18 for preventing the ink in the storing space 16 from returning back to the ink tank 12 and for delivering the ink only to a pen core 10 side. By moving the pen core 10 to the rear end side, the ink in the storing space 16 is supplied to the pen core 10, with the valve body 18 engaged with a guide piston body 22 to block the passage of the guide piston body 22. Thereafter, the pen core 10 is moved from the rear end side to the front end side, thereby moving the ink in the ink tank 12 into the storing space 16. <P>COPYRIGHT: (C)2011,JPO&INPIT |
