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:
Dec. 07, 1999
Filed:
Jul. 14, 1998
Andrew J Binder, Lake Zurich, IL (US);
Quintin T Phillips, Boise, ID (US);
K Trent Christensen, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An image forming apparatus in accordance with the invention includes a print engine with a photoreceptor, a laser exposure device for creating an image on the photoreceptor and one or more toning stations for toning the photoreceptor, after imaging. A system for enabling adjustment of the apparatus performance characteristics further includes a sensor for detecting characteristics of a toned image on the photoreceptor. A memory is provided for storing control parameters used to adjust operations of the printer; desired image characteristic parameters and previously measured image parameters. A processor is responsive to a performance assessment procedure for causing the print engine to create a toned test image on the photoreceptor. The processor then compares signals that are indicative of characteristic parameters of the toned test image with desired image characteristic parameters from the memory. Thereafter, in accordance with the comparison, the processor adjusts printer control parameters to bring the characteristics of the printed image closer to those which are dictated by the desired image characteristic parameters.