| 摘要 |
<p>An electrostatographic printing system (40) is disclosed as having a document-supporting drum (43) and an optical means (20,21) for scanning a document for exposing the same to a moving photoreceptor belt (15). The belt and the drum have their surfaces moved in synchronism by a motor drive for each, and including a control system devised to sense the relative speeds of the belt and drum surfaces, and to produce a correction signal for one of the motor drives.</p> |
