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:
May. 11, 1993
Filed:
Sep. 05, 1991
Daniel W MacDonald, Farmington, NY (US);
Mark A Scheuer, Williamson, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
The Infra-Red Densitometer (IRD) readings of developed toner patches in a tri-level imaging apparatus are compared to target values stored in Non-Volatile Memory (NVM) and are also compared to the previous IRD reading. Toner dispensing decisions (i.e. addition or reduction) are based on both comparisons. In this manner, not only are IRD readings examined as to how far the reading is from the target, they are examined as to current trend (i.e. whether the reading is moving away from or toward the target). Thus, if the IRD reading indicates that the toner concentration is low but is heading toward the target then the amount of added toner is somewhat reduced. If the IRD reading indicates that the toner concentration is low and is heading away from target (getting lower) then some extra toner is dispensed