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:
Feb. 16, 2010
Filed:
Aug. 30, 2005
Keiichi Taguchi, Nagano-ken, JP;
Masahiro Maeda, Nagano-ken, JP;
Isao Inaba, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An image forming apparatus and an image forming method, which are capable of forming images at stable image quality by executing adjustment of operating conditions at appropriate timings, are provided. When a Vsync count corresponding to an integrated value of a rotation count of an intermediate transfer belt reaches a predetermined value Vor V, a charging current Iw is increased by one level and an adjusting operation of a developing bias is executed (at a time tor t), to thereby stabilize an image density. Further, when remaining service life of a developer reaches a predetermined value (50%) (at a time t), if the Vsync count at that moment suggests that the time to change the charging current Iw is drawing near, the change thereof is executed ahead of the schedule, whereby the adjusting operation of the developing bias, which should otherwise be executed at the time t, is omitted.