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:
Apr. 13, 2010
Filed:
Jun. 03, 2008
Eric M Gross, Rochester, NY (US);
Jack T Lestrange, Macedon, NY (US);
Charles a Radulski, Macedon, NY (US);
Eric M Gross, Rochester, NY (US);
Jack T Lestrange, Macedon, NY (US);
Charles A Radulski, Macedon, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
A method and apparatus for sensor calibration to obtain transfer efficiency measurements in a reprographic device from a pair of optical toner mass sensors, one located before and one located after transfer. Individual sensors differ (mounting variation, electrical component variation, etc.) in their response to a common sample. Because of low mass levels in transfer efficiency measurements it is essential to reduce sensor to sensor differences. Disclosed is a method of calibrating the sensors to each other by utilizing each sensor's response to at least two identical mass levels. Actual mass levels do not need to be known (except for the zero mass which is easy to ensure) and the individual sensor sensitivities do not need to be known since the ratio of responses yields the necessary sensor characterization. This method does not require unique calibrations among sensors and results in a more accurate and precise measurement of transfer efficiency.