| 摘要 |
An endless belt is disposed closely above and parallel to a transparent platen. The belt is rotatably driven to move an original document for electrophotography or the like from an inlet onto the platen into engagement with a stopper. Pressure means cause the belt to initially press against the document with a large force to ensure document transport across the platen. The belt drive means is de-energized and the pressure force reduced just before the document engages the stopper to prevent jamming of the leading edge of the document against the stopper as the belt overtravels the document due to its inertia. After an imaging exposure of the document, the stopper is retracted and the belts driven to discharge the document from the platen into a tray provided at an outlet. Means are provided to discharge static electricity from the document and facilitate document stacking in the tray. A spacer plate limits upward and lateral movement of the belt, thereby preventing rebound and lateral displacement of the document when the document engages the stopper. The document feed means is designed to ensure that one document will be discharged completely before a subsequent document engages the stopper. The inertia of the belt and drive means is selected such that, even though a predetermined error range is unavoidable in the timing of de-energizing the drive means before the document engages the stopper, the drive means will be de-energized before the document engages the stopper and said inertia will be great enough to carry the document to the stopper.
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