| 摘要 |
An applicator that makes it unlikely for an ink, particularly water-based or alcohol solvent ink, to become blurred and assures smooth writing, including an ink reservoir accommodating an ink, a penpoint tip for ink application, and a valve mechanism, wherein the valve mechanism has an axially movable valve body, a valve seat situated on the side of the ink reservoir with respect to the valve body, and a valve support situated on the side of the tip with respect to the valve body; the valve support can anchor the valve body and has an interstice between it and the valve body through which the ink passes; when the tip is disposed upward, the valve body contacts the valve seat to prevent backflow of ink from the tip toward the ink reservoir; and when the tip is disposed downward, the valve body contacts the valve support, allowing the ink to flow through the interstice toward the tip; characterized in that a portion of the valve body that contacts the valve support is formed spherical, and the projected area of the interstice not covered by the valve body produced by projecting the valve body and the interstice onto a plane perpendicular to the axis is 0.035 mm<2> or more. <IMAGE> |
