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:
Nov. 17, 1998
Filed:
Apr. 01, 1996
Masato Asanuma, Nara, JP;
Toshiaki Ino, Yamatokoriyama, JP;
Kanshiro Okamoto, Memphis, JP;
Hideji Saiko, Yamatokoriyama, JP;
Toshihisa Ishida, Kashiba, JP;
Katsuaki Sumida, Kitakatsuragi-gun, JP;
Motoyuki Itoyama, Yamatokoriyama, JP;
Hiroo Naoi, Yamatokoriyama, JP;
Mitsuru Tokuyama, Nara, JP;
Eisaku Hatanaka, Yamatokoriyama, JP;
Yuichiro Takesue, Nara, JP;
Jitsuo Masuda, Yamatotakada, JP;
Masayasu Narimatsu, Nara, JP;
Yasuo Kitabatake, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The image forming apparatus of the invention controls the toner density by any one of the following configurations: by correcting the toner density of the developer in association with the agitation total; by controlling a process parameter so that the density of a toner patch formed on the photoreceptor corresponds to a prescribed density value and determining that developing performance of the developer is improved and canceling the toner density correction when the process parameter reaches the prescribed value; by changing the toner density reference value when the variation as to the charger output is equal to or greater than a first predetermined value and maintaining the changed toner density reference value until the variation of the charger output again becomes equal to or greater than the first predetermined value; or by prohibiting toner supply for a constant duration to prevent excessive toner supply if time from the end of the last operation of the developing unit to the start of a next operation, inclusive of the power-activation is equal to or longer the a predetermined period when the developing unit is activated to commence agitation of the developer.