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. 28, 2012
Filed:
May. 05, 2009
Shigeo Uetake, Takatsuki, JP;
Toshiya Natsuhara, Takarazuka, JP;
Junya Hirayama, Takarazuka, JP;
Takeshi Maeyama, Ikeda, JP;
Makiko Watanabe, Uji, JP;
Shigeo Uetake, Takatsuki, JP;
Toshiya Natsuhara, Takarazuka, JP;
Junya Hirayama, Takarazuka, JP;
Takeshi Maeyama, Ikeda, JP;
Makiko Watanabe, Uji, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
Provided are a developing device and an image forming apparatus which employ a hybrid development method, have a toner-collecting developer supporting member and keep toner collecting ability stable for a long period of time to form high-quality images without development hysteresis (ghost) over a long period of time. A toner separation member abutting the toner-collecting developer supporting member through a toner-collecting developer layer is provided, and the toner separation member is applied with a bias voltage to form an electric field in such a direction as to pull toner away from the toner-collecting developer supporting member to prevent the toner from accumulating on the surface of the toner-collecting developer supporting member.