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US 7,398,047 B2Granted
Image tracking control algorithm
AssigneeXerox Corporation
InventorsMartin Krucinski, Joannes N. M. DeJong, Lloyd A. Williams
Life of this patent
Estimating the term…
Abstract
An image-to-sheet closed loop registration system tracking the image drum position and/or velocity and coordinating movement of the sheet into the transfer nip based on such information.
Claims9
A system comprising:
- an image carrying member operationally configured to receive and transfer an image at an image transfer point of said image carrying member to a sheet material;
- a sheet registration system operationally configured to be capable of varying the arrival time of said sheet material at said image transfer point on said image carrying member;
- one or more sensors for detecting, with respect to time, a position and/or velocity of said image carrying member;
- and
- a processor arranged to receive the detected position and/or velocity from the one or more sensors and to communicate with said sheet registration system, the processor configured to:
- determine correction information based on a difference between the detected position and a nominal position of the image carrying member and/or a difference between the detected velocity and a nominal velocity of the image carrying member,
- forward the correction information to the sheet registration system to control the velocity of movement of the sheet material, and
- receive feedback information from the sheet registration system regarding actual velocity of the sheet material to refine the forwarded correction information and provide a more accurate transfer of the image at the image transfer point of the image carrying member.
5 more elements
A method for controlling image-to-sheet registration in a printing device employing a transfix roller operationally associated with an image transfer drum and a sheet registration system for supplying sheet material, said method comprising:
- detecting a position and/or velocity of the image transfer drum;
- determining correction information based on a difference between the detected position and a nominal position of the image transfer drum and/or a difference between the detected velocity and a nominal velocity of the image transfer drum;
- forwarding the correction information to the sheet registration system to control the velocity of movement of the sheet material, and
- receiving feedback information from the sheet registration system regarding actual velocity of the sheet material to refine the forwarded correction information and provide a more accurate transfer of the image at an image transfer point of the image transfer drum.
1 more element
Dependencies are inferred from the claim text.