Patent ID: 8366102
Filing Date: 2013-02-05
Classification: B65H

Abstract:
1. An apparatus for registering the leading edge of a sheet moved substantially in a process direction along a path in a media handling assembly, a lateral direction extending perpendicular to the process direction, the apparatus comprising: a first nip assembly and a second nip assembly, the first and second nip assemblies being spaced apart from one another; a first sheet leading edge sensor, the first sheet leading edge sensor detecting an arrival of a leading edge of a sheet at a point in the process direction, wherein the arrival is associated with engagement of the first and second nip assemblies with the sheet, the first sheet leading edge sensor being disposed laterally between opposed lateral edges of the sheet upon arrival, the first and second nip assemblies imparting a rotational skew velocity to the sheet, a center of rotation of the skew velocity being offset laterally from a center of the sheet leading edge, the skew velocity center of rotation being coincident with a lateral position of a virtual point, the virtual point lateral position being laterally disposed between the first and second nip assemblies; a second sheet leading edge sensor laterally spaced from the first sheet leading edge sensor, the virtual point lateral position being offset laterally from a lateral position of both the first and second sheet leading edge sensors; and a controller operatively connected to the first nip assembly, the second nip assembly, the first sheet leading edge sensor, and the second sheet leading edge sensor, the controller signaling at least one of the first and second nip assemblies to impart the rotational skew velocity to the sheet, wherein the virtual point lateral position is determined based upon which of the first and second sheet leading edge sensors initially detected the leading edge of the sheet.