Patent ID: 7055819

Claim:
A device for the alignment of a sheet comprising: a first sheet alignment actuator; an alignment cylinder, said alignment cylinder being positioned after, in a direction of sheet travel, said first sheet alignment actuator; a downstream sheet handling device, said downstream sheet handling device being positioned after, in said direction of sheet travel, said alignment cylinder and adapted to receive sheets from said alignment cylinder, and at least first, second and third sensors, each of said at least first, second and third sensors being adapted to measure a position of the sheet, said at least first, second and third sensors being arranged one behind the other in said direction of sheet travel, said first sensor being positioned to measure an edge offset of a front edge of the sheet during entry of the sheet into said first sheet alignment actuator, said first sheet alignment actuator aligning the sheet in response to said first sensor, said second sensor being positioned to measure said edge offset of said front edge of the sheet during, transfer of the sheet from said first sheet alignment actuator to said alignment cylinder, said alignment cylinder aligning said front edge of the sheet in accordance with said second sensor, said third sensor being positioned to measure said edge offset of said front edge of the sheet during transfer of the sheet to said downstream sheet handling device.