Patent ID: 6460842
Filing Date: 2002-10-08
Classification: B65H

Abstract:
A device for superposing of sheets of paper, comprising:longitudinal transport devices for transporting sheets of paper that lie side-by-side in two parallel rows in a paper path (Eâ€”E) in a direction of movement (P) of the sheets of paper that extends in the direction of the rows, said transporting devices moving the sheets of paper from the corresponding row one after the other, an assembly station for receiving the sheets of paper comprising: a lower vacuum conveyance unit arranged below the paper path and associated with one of the rows, the lower vacuum conveyance unit receiving the sheets of paper coming from the one row; and a discharge device for receiving the sheets of paper, which are superposed in pairs, and discharged simultaneously from the assembly station, wherein the lower vacuum conveyance unit includes a first continuous conveyor belt provided with perforations, said conveyor belt being guided over two guide rollers supported in a carrier and through a lower vacuum chamber arranged therebetween, said vacuum chamber being open toward an upper operating strand of the first conveyor belt that borders the paper path, wherein at least one upper vacuum conveyance unit arranged above the paper path (Eâ€”E) is associated with the other row of sheets of paper, wherein a lower operating strand of a second conveyor belt borders the paper path, and an upper vacuum chamber opens toward the lower operating strand, wherein two ends of the carriers each carry one of the guide rollers of the respective conveyor belt, are arranged one behind the other in the direction of movement (P) of the sheets of paper, and are adjustable independently from one another transversely with respect to the direction of movement of the sheets of paper by respective adjusting devices, wherein in the assembly station between the lower and the upper vacuum conveyance units, a separating plate is provided extending in the paper path (Eâ€”E), and wherein a guiding device is provided in the direction of movement (P) of the paper in front of the separating plate for each row of the sheets of paper, the guiding devices operating so that the sheets of paper originating from each row are each fed to the respective operating strand of the respective conveyor belt of the respective vacuum conveyance unit associated with the row, and wherein, to superpose the sheets of paper, at least the carrier of one of said vacuum conveyance units is adjustable transversely with respect to the direction of movement (P) of the paper by the adjusting device so that the conveyor belt crosses, in an outlet-side area of the assembly station, the corresponding conveyor belt of the other vacuum conveyance unit arranged on the opposite side of the separating plate.