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AssigneeXerox Corporation
InventorsPaul N. Richards, Lawrence R. Benedict, Brian R. Ford, David A. D'Angelantonio
Estimating the term…
A sheet handling system for correcting the skew and/or transverse position of sequential sheets, especially those moving in a process direction in a sheet transport path of a reproduction apparatus to be registered for image printing, of the type in which the deskewing and/or side registration is accomplished by partially rotating the sheet with a transversely spaced pair of differentially driven sheet steering nips. The effective range of sheet size capabilities of such systems may be increased without steering nip slippage or other problems by applying a control signal proportional to the width of the sheet to a system for automatically increasing or decreasing the transverse spacing between the pair of sheet steering nips, so as to provide a much wider spacing for larger sheets yet still be able to handle small sheets. This may be provided as shown by automatically engaging only a selected pair of steering nips out of a selectable plurality of different fixed position sheet steering nips and disengaging the others by lifting their idlers out of the sheet path with cams rotated by a stepper motor with a rotation controlled by the sheet width signal.
In a sheet handling method for correcting the skew or transverse position of sequential image substrate sheets moving in a process direction in a sheet transport path of a reproduction apparatus, in which selected sheets are partially rotated by a transversely spaced-apart pair of differentially driven sheet steering nips, and said image substrate sheets have a variety of sheet widths transversely of said sheet path, the improvement comprising:
In a sheet handling system for a reproduction apparatus sheet transport path for correcting the skew or transverse position of image substrate sheets moving in a process direction in said sheet transport path, wherein said sheet handling system includes two transversely spaced apart differentially driven and engaged sheet steering nips for partially rotating selected sheets for correcting their skew or transverse position, and wherein said image substrate sheets have a variety of sheet widths transversely of said sheet path, the improvement in said sheet handling system for increasing the range of said widths of said image substrate sheets which can be effectively handled by said sheet handling system, comprising:
In a sheet handling system for feeding and deskewing and/or transversely registering various sizes of image substrate sheets in a sheet path in which the image substrate sheets are being fed in a sheet movement direction, comprising a pair of engaged sheet steering nips transversely spaced apart by a distance from one another relative to said sheet movement direction, which sheet steering nips are differentially driven for controlled partial rotation of said image substrate sheets in said sheet path, the improvement for increasing the range of sheet sizes which may be reliably handled by said sheet handling system comprising:
Dependencies are inferred from the claim text.