| 摘要 |
PROBLEM TO BE SOLVED: To provide a tip for a high-quality ballpoint pen without remaining any bubble in centrifugal separation process upon manufacturing a refill. SOLUTION: In the tip for the ballpoint pen wherein a transfer ball 1, retained in the fore end ball house 11 in a holder 10, is energized by a resilient member 20 from the rear end of the same, the rear end of the resilient member 20 is received by a plurality of small projections 13a provided on the inner peripheral surface of the metallic holder 10 integrally in the peripheral direction thereof whereby bubbles in the holder 10 are passed between the plurality of small projections 13a, 13a and are moved smoothly rearward upon deaeration in the centrifugal separation process in the manufacturing process of the refill. |
