Calibration method and system for sheet registration and deskewing
AssigneeXerox Corporation
InventorsLloyd A. Williams, Joannes N. M. deJong, Barry M. Wolf
Life of this patent
Estimating the term…
Abstract
There is provided a calibration system for a deskewing and registering device for an electrophotographic printing machine. The method includes a.) moving a sheet from a first position to a second position along a paper path; b.) sensing the position of the sheet at the first position and the second position; c.) choosing a correction value to cause the sheet to change a lateral position from the first position to the second position; d.) repeating the moving, sensing, and choosing steps until a predetermined adjustment is made when moving the sheet from the first position to the second position to determine a proper calibration value.
Claims12
A method for calibrating a sheet registration device, comprising:
- a.) moving a sheet from a first position to a second position along a paper path;
- b.) sensing the position of the sheet at the first position and the second position;
- c.) choosing a correction value to cause the sheet to change position from the first position to the second position;
- d.) repeating the moving, sensing, and choosing steps until the sheet reaches a desired position when moving from the first position to the second position to determine a proper calibration value.
An apparatus for calibrating a sheet registering and deskewing device, comprising:
- a plurality of sensors, located along a paper path, to sense a position of a sheet in the paper path at a first position and a second position, and to generate a signal indicative thereof;
- a pair of independently driven drive nips located in the paper path for forwarding the sheet from the first position to the second position;
- a controller, to receive signals from said plurality of sensors and to generate motor control drive signals for said pair of independently driven drive nips so as to induce a corrective action in the movement of the sheet from the first position to the second position in the paper path and to repeat the corrective action until a predetermined position is attained by said sheet to calibrate said plurality of sensors.
An electrophotographic printing machine having a system for calibrating a sheet registering and deskewing device, comprising:
- a plurality of sensors, located along a paper path, to sense a position of a sheet in the paper path at a first position and a second position, and to generate a signal indicative thereof;
- a pair of independently driven drive nips located in the paper path for forwarding the sheet from the first position to the second position;
- a controller, to receive signals from said plurality of sensors and to generate motor control drive signals for said pair of independently driven drive nips so as to induce a corrective action in the movement of the sheet from the first position to the second position in the paper path and to repeat the corrective action until a predetermined position is attained by said sheet to calibrate said plurality of sensors.
Dependencies are inferred from the claim text.