Electrophotography – Image formation – Development
Reexamination Certificate
2008-07-10
2011-10-18
Gray, David (Department: 2852)
Electrophotography
Image formation
Development
C399S291000
Reexamination Certificate
active
08041268
ABSTRACT:
A developing device comprises a latent image carrier that carries a latent image, a toner carrier opposing the latent image carrier while carrying toner to develop the latent image, and plural electrodes arranged in a prescribed direction insulated from each other on the surface of the toner carrier to create an electric field therebetween. An alternating voltage supplying device is provided to supply n number of phases (n ≧2) of an alternating voltage to the plural electrodes, respectively. The alternating voltage changes the electric field to cause the toner to hop and form toner cloud on the surface of the toner carrier. The toner hopping is halted at a prescribed time period during the toner cloud formation.
REFERENCES:
patent: 5860040 (1999-01-01), Shimizu et al.
patent: 5884131 (1999-03-01), Shimizu et al.
patent: 6658227 (2003-12-01), Oyama et al.
patent: 7313336 (2007-12-01), Kadota et al.
patent: 7340204 (2008-03-01), Nakazato et al.
patent: 2006/0088337 (2006-04-01), Nakazato et al.
patent: 2006/0216071 (2006-09-01), Yamada et al.
patent: 2006/0251449 (2006-11-01), Takahashi et al.
patent: 2007/0013924 (2007-01-01), Sakai et al.
patent: 2007/0015071 (2007-01-01), Tsukamoto et al.
patent: 2007/0086811 (2007-04-01), Tsukamoto et al.
patent: 2007/0212121 (2007-09-01), Takahashi et al.
patent: 2007/0242985 (2007-10-01), Aoki et al.
patent: 2008/0124138 (2008-05-01), Kosugi et al.
patent: 3-21967 (1991-01-01), None
patent: 3-100575 (1991-04-01), None
patent: 3-113474 (1991-05-01), None
patent: 9-269661 (1997-10-01), None
patent: 2002-341656 (2002-11-01), None
patent: 2003-15419 (2003-01-01), None
patent: 2003-84560 (2003-03-01), None
patent: 2004-101933 (2004-04-01), None
patent: 2004-286837 (2004-10-01), None
U.S. Appl. No. 12/205,314, filed Sep. 5, 2008, Nakagawa, et al.
U.S. Appl. No. 12/205,240, filed Sep. 5, 2008, Takahashi, et al.
Ishii Yasuyuki
Kadota Ichiroh
Kosugi Hideki
Nakagawa Yoshinori
Takahashi Tomoko
Bonnette Rodney
Gray David
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh Company Limited
LandOfFree
Developing device, process cartridge, and image forming... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Developing device, process cartridge, and image forming..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing device, process cartridge, and image forming... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4291823