| 摘要 |
<p>A device for edging points of ball point pens wherein three equivangularly spaced rollers run on a conical surface. The point to be worked is moved into a working zone defined by regions of the three rollers in a direction along the axis of the conical surface in a direction from the apex to the conical surface towards the wider end of the conical surface. The rollers either react against a rotatable disc or a fixed shaft, in which latter case the conical surface is rotatable.</p> |
