| 摘要 |
<p>A roll-point pen has a roll-tip (4) which has an ellipsoidal portion (3) and which is mounted for rotation about the longer axis of the ellipsoidal portion (3) in the end of a tubular holder (2) providing an ink reservoir (5). The surface of the ellipsoidal portion (3) may be formed with ridges (7) extending obliquely to the longer axis of the roll-tip so that a rotational force is applied to the roll-tip due to friction between it and the surface of a paper sheet when the roll-tip is moved in the direction of the longer axis thereof. <IMAGE></p> |
