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. 18, 2000
Filed:
Oct. 23, 1998
Clint S Cuzzo, Star, ID (US);
W K Meade, II, Eagle, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
The invention accurately meters usage of an electrophotographic printer/copier (EPC) by counting the number of pages that are ejected to an output bin of the EPC and incrementing a user charge value accordingly. Further, the invention determines a toner parameter value that is related to an amount of toner used on each page and bases the user charge value, at least in part, on such toner parameter value. The toner parameter value is preferably determined by counting a number of pixels that are imaged on a page. The invention further utilizes a non-volatile memory to maintain copies of usage total values, while concurrently storing such usage total values on a disk memory. If an attempt is made to substitute a different disk memory in the EPC, usage parameter values are updated thereon through use of values stored in the nonvolatile memory.