| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direct liquid type writing implement surely preventing ink leakage from a penpoint side even when the pressure in an ink tank rises. <P>SOLUTION: The direct liquid type writing implement 1 comprises a penpoint 2, an ink occluding body 3 inserted with a rear end of the penpoint 2, an ink tank 8 disposed in the rear of the ink occluding body 3 and storing the ink 9 directly, and a plurality of communication tubes 6 connecting the ink tank 8 with the ink occluding body 3. The front end of each communication tube 6 is inserted from the rear end of the ink occluding body 3 forward to pressurizingly compress the inside of the ink occluding body 3. Each front end of the communication pipes 6 is positioned inside the ink occluding body 3. V2/V1 is in a range of 0.02-0.3, and (V2+V3)/V1 is in a range of 0.03-0.4, wherein, V1 is the volume of the ink occluding body 3, and V2 is the volume of the insertion part of the communication tube 6 into the ink occluding body 3. <P>COPYRIGHT: (C)2009,JPO&INPIT |
