| 摘要 |
<p>PURPOSE: To provide a high friction roller and its manufacture with which height of projections are comparatively freely adjusted, an acute leading end is provided for high feeding accuracy of paper, bringing about a low manufacturing cost. CONSTITUTION: A tool 21 penetrates into an outer peripheral surface 13 of a metal cylindrical or columnar body 11 by applying shock. A recession 14a is prepared by plastic deformation through biting of the leading end of the tool 21. A projection 14 is formed adjacent thereto. The projections 14 are formed on the outer peripheral surface 13 of the cylindrical body 11 with specified spacings or at rondam, for obtaining a high friction roller. By adjusting angle or pressure of penetration of the tool 21, the projections 14 of desired shape and height are evenly formed.</p> |
