Title:
DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2016/042717
Kind Code:
A1
Abstract:
A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10X) (Ω・cm) of carrier is 11.5－16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.
Inventors:
IWATSUKI HITOSHI (JP)
SAKATA KOICHI (JP)
TOHMATSU HIROSHI (JP)
TANO TOYOAKI (JP)
MASHIKO KENICHI (JP)
TAKII MARIKO (JP)
KISHIDA HIROYUKI (JP)
MURASAWA YOSHIHIRO (JP)
KONDOH KEINOSUKE (JP)
KOIKE TOSHIO (JP)
TAKAHASHI YUTAKA (JP)
SAKATA KOICHI (JP)
TOHMATSU HIROSHI (JP)
TANO TOYOAKI (JP)
MASHIKO KENICHI (JP)
TAKII MARIKO (JP)
KISHIDA HIROYUKI (JP)
MURASAWA YOSHIHIRO (JP)
KONDOH KEINOSUKE (JP)
KOIKE TOSHIO (JP)
TAKAHASHI YUTAKA (JP)
Application Number:
PCT/JP2015/004422
Publication Date:
March 24, 2016
Filing Date:
August 31, 2015
Export Citation:
Assignee:
RICOH CO LTD (JP)
IWATSUKI HITOSHI (JP)
SAKATA KOICHI (JP)
TOHMATSU HIROSHI (JP)
TANO TOYOAKI (JP)
MASHIKO KENICHI (JP)
TAKII MARIKO (JP)
KISHIDA HIROYUKI (JP)
MURASAWA YOSHIHIRO (JP)
KONDOH KEINOSUKE (JP)
KOIKE TOSHIO (JP)
TAKAHASHI YUTAKA (JP)
IWATSUKI HITOSHI (JP)
SAKATA KOICHI (JP)
TOHMATSU HIROSHI (JP)
TANO TOYOAKI (JP)
MASHIKO KENICHI (JP)
TAKII MARIKO (JP)
KISHIDA HIROYUKI (JP)
MURASAWA YOSHIHIRO (JP)
KONDOH KEINOSUKE (JP)
KOIKE TOSHIO (JP)
TAKAHASHI YUTAKA (JP)
International Classes:
G03G15/09; G03G9/10; G03G9/113; G03G15/06; G03G15/08
Foreign References:
| US20120058423A1 | 2012-03-08 | |||
| US20010055503A1 | 2001-12-27 | |||
| JPH0519604A | 1993-01-29 | |||
| US20140072910A1 | 2014-03-13 | |||
| JP2012168225A | 2012-09-06 |
Other References:
See also references of EP 3195063A4
Attorney, Agent or Firm:
HIROTA, Koichi (NAGARE & ASSOCIATES 4th Floor, TS Bldg., 1-24-10, Yoyogi, Shibuya-k, Tokyo 53, JP)
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