| 摘要 |
<p>PURPOSE: To prevent the generation of breakdown of a supporting shaft of a driving roller and the generation of noise in the case where a presser member is operated to freely contact with a rotated driving roller and separate therefrom. CONSTITUTION: A member supporting mechanism 24 for operating a presser member 12 to contact with a driving roller 7 and separate therefrom in the nearly tangential direction is provided so as to prevent the application of the impact force, which is to be generated at the time of abutment of the presser member 12 and the driving roller 7, toward the center of the driving roller 7.</p> |
