| 摘要 |
<p>This invention is directed to a rotary device including a stylus, support means for supporting a record sheet, and drive means for creating rotary motion of the stylus and the support means relative to one another. It includes stylus positioning means for positioning the stylus near the support means to contact the sheet during the rotary motion, and for positioning the stylus away from the support means when the speed of the rotary motion is below a predetermined level.</p> |
