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:
Sep. 22, 1998
Filed:
Dec. 26, 1996
Kunio Yamada, Ashigarakami-gun, JP;
Atsushi Ogihara, Ashigarakami-gun, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
Operation variables such as laser power, grid voltage, and developing bias are corrected by using image-density controlling rules so as to control the image density. Control of toner supply is also effected by using the image-density controlling rules. A solid density reference pattern corresponding to actual values of the operation variables is measured, and a rule which fits the solid density is used to correct the operation variables. A solid density to be obtained with standard values of the operation variables is calculated by using the composed rule. A standard solid density for a standard toner concentration or a standard toner charge amount is outputted, and is compared with the calculated solid density. The toner supply is controlled in such a manner that an error between the two solid densities becomes zero, to thereby ensure that the toner concentration in a developing device or the toner charge amount reaches a standard value.