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:
Jun. 12, 2012
Filed:
Dec. 02, 2009
Takeshi Maeyama, Ikeda, JP;
Toshiya Natsuhara, Takarazuka, JP;
Junya Hirayama, Takarazuka, JP;
Shigeo Uetake, Takatsuki, JP;
Makiko Watanabe, Uji, JP;
Takeshi Maeyama, Ikeda, JP;
Toshiya Natsuhara, Takarazuka, JP;
Junya Hirayama, Takarazuka, JP;
Shigeo Uetake, Takatsuki, JP;
Makiko Watanabe, Uji, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
In a hybrid development method using a plurality of toner carriers, a development device and image forming apparatus are provided, wherein high image quality in which toner density is not reduced even in the case of high speed printing and the occurrence of development hysteresis (ghost) is controlled is ensured by accelerating the collection of the post-development residual toner on the toner carrier. The counter-charge having occurred in the developer remains in the developer without decreasing to disappear until the developer moves to the second toner carrier on the downstream-side, wherein this counter-charge is caused by supplying toner to the first toner carrier upstream in the rotating direction of the developer carrier.