Patent ID: 7819399

Claim:
In a high speed apparatus for registering a sheet in a feed path, including first and second sheet drive rolls rotatably mounted in the feed path for rotation about respective first and second coaxial axes transverse to the feed path, a first motor for moving the first and second sheet drive rolls transversely with respect to the feed path, second and third motors for independently rotatably driving the first and second sheet drive rolls, sensors for detecting the transverse, longitudinal and skew positioning of a sheet in the feed path, a controller responsive to detection of longitudinal mispositioning of a sheet in the feed path by said sensors to change the drive speed of the first and second sheet drive rolls, responsive to the detection of skew mispositioning of a sheet in the feed path by the sensors to change the speed of one sheet drive roll with respect to the other and responsive to the detection of transverse mispositioning to initiate movement of the first and second sheet drive rolls transversely, the improvement comprising; pre-registration sheet drive rolls positioned upstream of said first and second sheet drive rolls and adapted to cooperate with said first and second sheet drive rolls to create a buckle in a sheet captured therebetween, and wherein the velocities of each of said pre-registration sheet drive rolls and said first and second sheet drive rolls are adjusted by said controller in order to control the magnitude of said buckle.