The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2011
Filed:
May. 27, 2010
Marina Tharayil, Rochester, NY (US);
Barry P. Mandel, Fairport, NY (US);
Joannes N. Dejong, Hopewell Junction, NY (US);
Lloyd A. Williams, Mahopac, NY (US);
Marina Tharayil, Rochester, NY (US);
Barry P. Mandel, Fairport, NY (US);
Joannes N. deJong, Hopewell Junction, NY (US);
Lloyd A. Williams, Mahopac, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
A printing system and method using alternating control modes for one or more, but not all, sheet transport devices in order to avoid contention. In a printer having first, second and third sheet transport devices in series (e.g., registration, image transfer and image fixing devices), the second device can always operate in a velocity control mode. However, the first and/or third devices can alternate between velocity and torque control modes. For example, the first device can operate in a torque control mode, when a sheet is concurrently engaged by both the first and second devices, and in a velocity control mode at other times. Additionally or alternatively, the third device can operate in a torque control mode, when a sheet is concurrently engaged by both the second and third devices, and in a velocity control mode at other times. Transition control modes can be implemented to generate smooth transitions between modes.