| 摘要 |
The invention relates to apparatus for the lateral registration and registration in the feed direction of sheets which are fed in a sheet stream across a feed table to a sheet treating machine, e.g. a printing press. They stretch out the sheet transversely to the feed direction. The apparatus includes two suction plates arranged at a distance one from another at right angles to the feed direction, which are each respectively drivable in rotation about an axis. By use of suction openings which can be subjected to suction, the respective frontmost sheet of the sheet stream can be grasped in the region of its front edge and moved to bring its side edge to lie against a side stop and to bring its front edge to lie against a front stop. In accordance with the invention, one suction plate is drivable rotatably in a first rotational sense and the second suction plate in the opposite rotational sense. The suction openings of one suction plate can be subjected to greater suction than the suction openings of the other plate, so that the correct desired stretching of the sheet and registration against front stops an a side stop is achieved. |
