| 摘要 |
<p>PURPOSE:To prevent the surface of a copying paper from being stained at the time of a resetting oscillation of a main body part of a data type, by a method wherein a member for interrupting the pressing force of a pressing roll in response to a recerse oscillation of an excentric cam integral with the main body of the data type. CONSTITUTION:A projected part of a stamper-operating cam 50 is brought into contact with a roller 52 immediately before a type on the main body of the data type integral with the oscillatable shaft 3 approaches to the copying paper. A pushing-up cam 62 is rotated clockwise through a link mechanism to push a stamper roller 63 upwards. After performing a predetermined printing, the shaft 3 is rotated in the reverse direction, and the roller 52 is pushed again onto the projected part of the cam 50. The roller 52 is pushed downwards, a release lever 53 is oscillated clockwise, the cam action of the cam 50 is not transmitted to a stamper cam shaft 4, and the stamper roller 63 is maintained at the lowest position.</p> |
