Abstract: A device for superposing sheets of paper comprising a lower vacuum conveyance unit for one row of sheets of paper (R1) and an upper vacuum conveyance unit for another row of sheets of paper (R2). The ends of the vacuum conveyance units can be adjusted independently from each other, crosswise to the direction in which the paper advances (P). One vacuum conveyance unit can be adjusted in a slanted position in relation to the direction in which the paper advances (P) so that it cuts across the vacuum conveyance unit on the opposite side.