| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct liquid type double headed writing utensil, in which the residual amount of ink can be recognized, stable flow rate is ensured until just before the end of writing, the writing from both the pen points (or tips) can always be possible until the ink in an ink tank can be suppressed and further the blowing-off due to the reduced pressure and the temperature rise at the ink tank is reduced. SOLUTION: In the double head type direct liquid writing utensil equipped with the ink tank and inducing means, which are equipped on both the sides of the ink tank and each of which consisting of the pen point (or the tip), an ink reserving body, an inner lead or the like, an means for checking the flowing of air in the ink tank through an upper ink receiving body air-liquid exchanging part under the state that no writing is executed, is equipped. |
