| 摘要 |
A writing instrument has a housing containing an ink reservoir. The writing instrument further has a writing nib in communication with one (or both) end of the ink reservoir by an ink induction device. In connection with the ink reservoir, there is also at least one set of pressure balance system. The pressure balance system includes a nano hydrophobic venting material that allows air to flow in and out of the reservoir to compensate pressure differential between ambient atmosphere and the interior of the ink reservoir, while prevents ink to flow from the ink reservoir to the atmosphere.
|
