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:
Mar. 21, 1995
Filed:
Nov. 13, 1992
Kazushige Narazaki, Katano, JP;
Yoshikazu Kawabe, Nagahama, JP;
Masafumi Yoshizawa, Kadoma, JP;
Osamu Ito, Kadoma, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma City, JP;
Abstract
Qualitative relations between changes in a charge voltage, a developer bias voltage and an exposure light intensity control voltage and change in an image density are investigated in advance, and a density error is derived by a difference between the density of the image of a reference mark and a target density. Respective variations of the charge voltage, developer bias voltage and exposure light intensity control voltage are derived on the basis of the qualitative relations and the density error, and thereby the charge voltage, developer bias voltage and exposure light intensity voltage are changed so as to decrease the density error.