| 摘要 |
<p>The device comprises a transport chain (1) for the sheets to be monitored (3) by a detector (5). The support bars (4, 4') on which the sheet to be examined (3) slides are equipped, in the monitoring area, with suction nozzles (4a) and in the gap between two support bars (4) movable arms (10) are provided, equipped at their extremity with suction nozzles (10a) which, in operating position, are aligned with the suction nozzles (4a) of the support bars and arranged in the transfer plane of the sheets in order to hold the sheet to be examined (3) in this plane. In order to avoid the clips (2a) which pull the sheet (3) touching the arms (10), means are provided for tilting the said arms (10) when the clips (2a) pass above these arms. <IMAGE></p> |
