| 摘要 |
PURPOSE:To brush an ink repulsive layer from every direction with simple structure and to execute developing excellent in dot reproduction. CONSTITUTION:When a driving shaft 158 is rotated by the driving force of a motor 182, a cam plate 146 is also rotated at the same time. At such a time, a supporting shaft 138 is revolved around the driving shaft 158. When the shaft 138 is revolved, the rotation of the brush 134 is prevented because the brush 134 is supported by two points(a pair of supporting shafts 138), so that the shaft 138 is rotated in an opposite direction to the revolving direction in order to absorb the prevention of the rotation. Thus, the brush 134 is moved around the shaft 158 while forming a loop in a state where it is moved in parallel. Namely, such movement is the same at every point of a brush material 130, so that rubbing degree(amount) to a waterless PS plate 12 which is rubbed by the brush 134 becomes the same and the PS plate 12 is rubbed from every direction. |
