Free ink writing instrument with nano technology
AssigneeToyo Pen International Ltd.
InventorZhao Zhang Dai
Life of this patent
Estimating the term…
Abstract
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.
Claims18
A writing instrument comprising:
- housing means having a reservoir therein for containing ink in a free-flowing state;
- writing nib means secured with respect to a front end of the housing, and in communication with the reservoir for drawing ink from the reservoir to a writing medium;
- and
- pressure balance system attached to a rear end of the housing, and in connection with the reservoir for venting the reservoir to atmosphere;
- the pressure balance system having a nano hydrophobic venting material for preventing ink flow from the reservoir to atmosphere, and permitting air flow into and out of the reservoir to compensate pressure differentials between the ambient atmosphere and the interior of the reservoir.
A writing instrument comprising:
- housing means having a reservoir therein for containing ink in a free-flowing state;
- at least one writing nib each of which at a corresponding end of the housing;
- ink guiding system connecting to the corresponding writing nib at a first end and to the reservoir at a second end for drawing ink from the reservoir to the corresponding writing nib;
- and
- pressure balance system in connection with the reservoir for venting the reservoir to atmosphere;
- the pressure balance system having a nano hydrophobic venting material for preventing ink flow from the reservoir to atmosphere, and permitting air flow into and out of the reservoir to compensate pressure differentials between the atmosphere and the interior of the reservoir.
Dependencies are inferred from the claim text.