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:
Oct. 17, 2000
Filed:
Dec. 22, 1998
Robert E Grace, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A method and apparatus in an electrostatographic reproduction machine having a plurality of development units for reliably producing high quality toner particle images under varying sustained area toner coverage conditions. The apparatus employing the method includes a control system (a) for reading a stored area toner coverage level threshold value; a first operating time control algorithm and a second operating time control algorithm for adding and admixing in each development unit of the plurality of development units; (b) for measuring sustained area toner coverage levels of images being reproduced during a reproduction job; (c) for comparing the measured sustained area toner coverage levels of images being reproduced with the stored area toner coverage level threshold value; and (d) for changing the operating time control algorithm for adding and admixing in each development unit between the first operating time control algorithm and the second operating time control algorithm depending on a result of comparing the measured sustained area toner coverage levels of images being reproduced with the stored threshold value.