| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball-point pen having an elastic ink tank which enables a user to completely use up ink without causing the intrusion of air into the ink tank and without causing a writing failure. <P>SOLUTION: In a ball-point pen 10 which includes an ink cartridge 30 housed in a shaft tube 11, an elastic ink tank 40 containing ink 41, and a ballpoint pen chip 60 provided with a writing ball 65 mounted to the tip of the elastic ink tank 40, the inside of the ballpoint pen chip 60 has an ink circulation hole 64 as an internal space that communicates from the elastic ink tank 40 to the writing ball 65, and a core 70 formed of a porous body is press-fitted into the ink circulation hole 64. <P>COPYRIGHT: (C)2013,JPO&INPIT |
