| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressurization type writing implement which prevents pressurized air on the occasion of fitting a cap from intruding through a penpoint and moreover can seal up the penpoint properly by fitting the cap. <P>SOLUTION: An ink holding tube 3 is held inside a holder tube 2. The penpoint 4 is made to project from a tip hole 21a of the holder tube 2. Ink 31 and a follower 32 are held inside the ink holding tube 3. An annular space 7 is formed between the inner surface of the holder tube 2 and the outer surface of the ink holding tube 3. The annular space 7 or the rear space of the follower 32 in the ink holding tube 3 is pressurized by a pressurizing operation of pressurizing equipment. A valve device 8 is provided in the space 7 between the tip hole 21a and the pressurizing equipment. When fitting the cap, the valve device 8 is brought temporarily into an opened state from a closed state and releases the pressurized air in the cap 9 into the space 7. In the pressurizing operation, the valve device 8 is put in the closed state and obstructs an air flow from the space 7 to the tip hole 21a. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
