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:
Aug. 10, 2004
Filed:
Aug. 27, 2001
James J. Franzen, Fairport, NY (US);
Paul A. Garsin, Webster, NY (US);
Edward W. Smith, Jr., Rochester, NY (US);
Eric M. Gross, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An apparatus ( ) for measuring toner concentration in a developer contained in a developer housing ( ) includes a developer sample container ( ) that receives a portion of developer extracted from the developer housing ( ). A spectrophotometer ( ) measures spectrophotometric data for the portion of the developer in the developer sample container ( ). A processor ( ) estimates the toner concentration based on the measured spectrophotometric data and a pre-determined relationship ( ) between the spectrophotometric data and the toner concentration. A method ( ) for estimating the toner concentration in a developer comprising a toner and a carrier includes measuring ( ) a color characteristic of the developer, comparing ( ) the measured color characteristic with a pre-determined relationship between the color characteristic and the toner concentration, and estimating ( ) the toner concentration based on the comparing.