| 摘要 |
<p>A ball point pen (10) includes a tubular member (12) with a hollow interior placeable in fluid communication with an ink supply (16), a socket (18) formed at one end of the member having a seat (20) and a cylindrical wall extending from the seat (20) and a rim structure (22') disposed at the end of the cylindrical wall opposite the seat (20), a spherical ball (24) disposed in the socket (18), rotatably engageable with the seat (20) and captured by the rim structure (22'), the diameter of the ball (24) being at least three percent smaller than the diameter of the seat (20) at the intersection of the seat (20) and the cylindrical wall.</p> |
